;;; allout.el --- extensive outline mode for use alone and with other modes ;; Copyright (C) 1992, 1993, 1994, 2001, 2002, 2003, 2004, ;; 2005, 2006, 2007 Free Software Foundation, Inc. ;; Author: Ken Manheimer ;; Maintainer: Ken Manheimer ;; Created: Dec 1991 - first release to usenet ;; Version: 2.2.1 ;; Keywords: outlines wp languages ;; Website: http://myriadicity.net/Sundry/EmacsAllout ;; This file is part of GNU Emacs. ;; GNU Emacs is free software; you can redistribute it and/or modify ;; it under the terms of the GNU General Public License as published by ;; the Free Software Foundation; either version 2, or (at your option) ;; any later version. ;; GNU Emacs is distributed in the hope that it will be useful, ;; but WITHOUT ANY WARRANTY; without even the implied warranty of ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;; GNU General Public License for more details. ;; You should have received a copy of the GNU General Public License ;; along with GNU Emacs; see the file COPYING. If not, write to the ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, ;; Boston, MA 02110-1301, USA. ;;; Commentary: ;; Allout outline minor mode provides extensive outline formatting and ;; and manipulation beyond standard emacs outline mode. Some features: ;; ;; - Classic outline-mode topic-oriented navigation and exposure adjustment ;; - Topic-oriented editing including coherent topic and subtopic ;; creation, promotion, demotion, cut/paste across depths, etc. ;; - Incremental search with dynamic exposure and reconcealment of text ;; - Customizable bullet format - enables programming-language specific ;; outlining, for code-folding editing. (Allout code itself is to try it; ;; formatted as an outline - do ESC-x eval-buffer in allout.el; but ;; emacs local file variables need to be enabled when the ;; file was visited - see `enable-local-variables'.) ;; - Configurable per-file initial exposure settings ;; - Symmetric-key and key-pair topic encryption, plus symmetric passphrase ;; mnemonic support, with verification against an established passphrase ;; (using a stashed encrypted dummy string) and user-supplied hint ;; maintenance. (See allout-toggle-current-subtree-encryption docstring. ;; Currently only GnuPG encryption is supported, and integration ;; with gpg-agent is not yet implemented.) ;; - Automatic topic-number maintenance ;; - "Hot-spot" operation, for single-keystroke maneuvering and ;; exposure control (see the allout-mode docstring) ;; - Easy rendering of exposed portions into numbered, latex, indented, etc ;; outline styles ;; - Careful attention to whitespace - enabling blank lines between items ;; and maintenance of hanging indentation (in paragraph auto-fill and ;; across topic promotion and demotion) of topic bodies consistent with ;; indentation of their topic header. ;; ;; and more. ;; ;; See the `allout-mode' function's docstring for an introduction to the ;; mode. ;; ;; The latest development version and helpful notes are available at ;; http://myriadicity.net/Sundry/EmacsAllout . ;; ;; The outline menubar additions provide quick reference to many of ;; the features, and see the docstring of the variable `allout-init' ;; for instructions on priming your Emacs session for automatic ;; activation of allout-mode. ;; ;; See the docstring of the variables `allout-layout' and ;; `allout-auto-activation' for details on automatic activation of ;; `allout-mode' as a minor mode. (It has changed since allout ;; 3.x, for those of you that depend on the old method.) ;; ;; Note - the lines beginning with `;;;_' are outline topic headers. ;; Just `ESC-x eval-buffer' to give it a whirl. ;; ken manheimer (ken dot manheimer at gmail dot com) ;;; Code: ;;;_* Dependency autoloads (require 'overlay) (eval-when-compile ;; Most of the requires here are for stuff covered by autoloads. ;; Since just byte-compiling doesn't trigger autoloads, so that ;; "function not found" warnings would occur without these requires. (progn (require 'pgg) (require 'pgg-gpg) (require 'overlay) ;; `cl' is required for `assert'. `assert' is not covered by a standard ;; autoload, but it is a macro, so that eval-when-compile is sufficient ;; to byte-compile it in, or to do the require when the buffer evalled. (require 'cl) )) ;;;_* USER CUSTOMIZATION VARIABLES: ;;;_ > defgroup allout (defgroup allout nil "Extensive outline mode for use alone and with other modes." :prefix "allout-" :group 'outlines) ;;;_ + Layout, Mode, and Topic Header Configuration ;;;_ = allout-auto-activation (defcustom allout-auto-activation nil "*Regulates auto-activation modality of allout outlines - see `allout-init'. Setq-default by `allout-init' to regulate whether or not allout outline mode is automatically activated when the buffer-specific variable `allout-layout' is non-nil, and whether or not the layout dictated by `allout-layout' should be imposed on mode activation. With value t, auto-mode-activation and auto-layout are enabled. \(This also depends on `allout-find-file-hook' being installed in `find-file-hook', which is also done by `allout-init'.) With value `ask', auto-mode-activation is enabled, and endorsement for performing auto-layout is asked of the user each time. With value `activate', only auto-mode-activation is enabled, auto-layout is not. With value nil, neither auto-mode-activation nor auto-layout are enabled. See the docstring for `allout-init' for the proper interface to this variable." :type '(choice (const :tag "On" t) (const :tag "Ask about layout" "ask") (const :tag "Mode only" "activate") (const :tag "Off" nil)) :group 'allout) ;;;_ = allout-default-layout (defcustom allout-default-layout '(-2 : 0) "*Default allout outline layout specification. This setting specifies the outline exposure to use when `allout-layout' has the local value `t'. This docstring describes the layout specifications. A list value specifies a default layout for the current buffer, to be applied upon activation of `allout-mode'. Any non-nil value will automatically trigger `allout-mode', provided `allout-init' has been called to enable this behavior. The types of elements in the layout specification are: integer - dictate the relative depth to open the corresponding topic(s), where: - negative numbers force the topic to be closed before opening to the absolute value of the number, so all siblings are open only to that level. - positive numbers open to the relative depth indicated by the number, but do not force already opened subtopics to be closed. - 0 means to close topic - hide all subitems. : - repeat spec - apply the preceeding element to all siblings at current level, *up to* those siblings that would be covered by specs following the `:' on the list. Ie, apply to all topics at level but trailing ones accounted for by trailing specs. (Only the first of multiple colons at the same level is honored - later ones are ignored.) * - completely exposes the topic, including bodies + - exposes all subtopics, but not the bodies - - exposes the body of the corresponding topic, but not subtopics list - a nested layout spec, to be applied intricately to its corresponding item(s) Examples: '(-2 : 0) Collapse the top-level topics to show their children and grandchildren, but completely collapse the final top-level topic. '(-1 () : 1 0) Close the first topic so only the immediate subtopics are shown, leave the subsequent topics exposed as they are until the second second to last topic, which is exposed at least one level, and completely close the last topic. '(-2 : -1 *) Expose children and grandchildren of all topics at current level except the last two; expose children of the second to last and completely expose the last one, including its subtopics. See `allout-expose-topic' for more about the exposure process. Also, allout's mode-specific provisions will make topic prefixes default to the comment-start string, if any, of the language of the file. This is modulo the setting of `allout-use-mode-specific-leader', which see." :type 'allout-layout-type :group 'allout) ;;;_ : allout-layout-type (define-widget 'allout-layout-type 'lazy "Allout layout format customization basic building blocks." :type '(repeat (choice (integer :tag "integer (<= zero is strict)") (const :tag ": (repeat prior)" :) (const :tag "* (completely expose)" *) (const :tag "+ (expose all offspring, headlines only)" +) (const :tag "- (expose topic body but not offspring)" -) (allout-layout-type :tag "")))) ;;;_ = allout-show-bodies (defcustom allout-show-bodies nil "*If non-nil, show entire body when exposing a topic, rather than just the header." :type 'boolean :group 'allout) (make-variable-buffer-local 'allout-show-bodies) ;;;###autoload (put 'allout-show-bodies 'safe-local-variable (if (fboundp 'booleanp) 'booleanp '(lambda (x) (member x '(t nil))))) ;;;_ = allout-beginning-of-line-cycles (defcustom allout-beginning-of-line-cycles t "*If non-nil, \\[allout-beginning-of-line] will cycle through smart-placement options. Cycling only happens on when the command is repeated, not when it follows a different command. Smart-placement means that repeated calls to this function will advance as follows: - if the cursor is on a non-headline body line and not on the first column: then it goes to the first column - if the cursor is on the first column of a non-headline body line: then it goes to the start of the headline within the item body - if the cursor is on the headline and not the start of the headline: then it goes to the start of the headline - if the cursor is on the start of the headline: then it goes to the bullet character (for hotspot navigation) - if the cursor is on the bullet character: then it goes to the first column of that line (the headline) - if the cursor is on the first column of the headline: then it goes to the start of the headline within the item body. In this fashion, you can use the beginning-of-line command to do its normal job and then, when repeated, advance through the entry, cycling back to start. If this configuration variable is nil, then the cursor is just advanced to the beginning of the line and remains there on repeated calls." :type 'boolean :group 'allout) ;;;_ = allout-end-of-line-cycles (defcustom allout-end-of-line-cycles t "*If non-nil, \\[allout-end-of-line] will cycle through smart-placement options. Cycling only happens on when the command is repeated, not when it follows a different command. Smart-placement means that repeated calls to this function will advance as follows: - if the cursor is not on the end-of-line, then it goes to the end-of-line - if the cursor is on the end-of-line but not the end-of-entry, then it goes to the end-of-entry, exposing it if necessary - if the cursor is on the end-of-entry, then it goes to the end of the head line In this fashion, you can use the end-of-line command to do its normal job and then, when repeated, advance through the entry, cycling back to start. If this configuration variable is nil, then the cursor is just advanced to the end of the line and remains there on repeated calls." :type 'boolean :group 'allout) ;;;_ = allout-header-prefix (defcustom allout-header-prefix "." ;; this string is treated as literal match. it will be `regexp-quote'd, so ;; one cannot use regular expressions to match varying header prefixes. "*Leading string which helps distinguish topic headers. Outline topic header lines are identified by a leading topic header prefix, which mostly have the value of this var at their front. Level 1 topics are exceptions. They consist of only a single character, which is typically set to the `allout-primary-bullet'." :type 'string :group 'allout) (make-variable-buffer-local 'allout-header-prefix) ;;;###autoload (put 'allout-header-prefix 'safe-local-variable 'stringp) ;;;_ = allout-primary-bullet (defcustom allout-primary-bullet "*" "Bullet used for top-level outline topics. Outline topic header lines are identified by a leading topic header prefix, which is concluded by bullets that includes the value of this var and the respective allout-*-bullets-string vars. The value of an asterisk (`*') provides for backwards compatibility with the original Emacs outline mode. See `allout-plain-bullets-string' and `allout-distinctive-bullets-string' for the range of available bullets." :type 'string :group 'allout) (make-variable-buffer-local 'allout-primary-bullet) ;;;###autoload (put 'allout-primary-bullet 'safe-local-variable 'stringp) ;;;_ = allout-plain-bullets-string (defcustom allout-plain-bullets-string ".," "*The bullets normally used in outline topic prefixes. See `allout-distinctive-bullets-string' for the other kind of bullets. DO NOT include the close-square-bracket, `]', as a bullet. Outline mode has to be reactivated in order for changes to the value of this var to take effect." :type 'string :group 'allout) (make-variable-buffer-local 'allout-plain-bullets-string) ;;;###autoload (put 'allout-plain-bullets-string 'safe-local-variable 'stringp) ;;;_ = allout-distinctive-bullets-string (defcustom allout-distinctive-bullets-string "*+-=>()[{}&!?#%\"X@$~_\\:;^" "*Persistent outline header bullets used to distinguish special topics. These bullets are distinguish topics with particular character. They are not used by default in the topic creation routines, but are offered as options when you modify topic creation with a universal argument \(\\[universal-argument]), or during rebulleting \(\\[allout-rebullet-current-heading]). Distinctive bullets are not cycled when topics are shifted or otherwise automatically rebulleted, so their marking is persistent until deliberately changed. Their significance is purely by convention, however. Some conventions suggest themselves: `(' - open paren - an aside or incidental point `?' - question mark - uncertain or outright question `!' - exclamation point/bang - emphatic `[' - open square bracket - meta-note, about item instead of item's subject `\"' - double quote - a quotation or other citation `=' - equal sign - an assignement, equating a name with some connotation `^' - carat - relates to something above Some are more elusive, but their rationale may be recognizable: `+' - plus - pending consideration, completion `_' - underscore - done, completed `&' - ampersand - addendum, furthermore \(Some other non-plain bullets have special meaning to the software. By default: `~' marks encryptable topics - see `allout-topic-encryption-bullet' `#' marks auto-numbered bullets - see `allout-numbered-bullet'.) See `allout-plain-bullets-string' for the standard, alternating bullets. You must run `set-allout-regexp' in order for outline mode to adopt changes of this value. DO NOT include the close-square-bracket, `]', on either of the bullet strings." :type 'string :group 'allout) (make-variable-buffer-local 'allout-distinctive-bullets-string) ;;;###autoload (put 'allout-distinctive-bullets-string 'safe-local-variable 'stringp) ;;;_ = allout-use-mode-specific-leader (defcustom allout-use-mode-specific-leader t "*When non-nil, use mode-specific topic-header prefixes. Allout outline mode will use the mode-specific `allout-mode-leaders' or comment-start string, if any, to lead the topic prefix string, so topic headers look like comments in the programming language. It will also use the comment-start string, with an '_' appended, for `allout-primary-bullet'. String values are used as literals, not regular expressions, so do not escape any regulare-expression characters. Value t means to first check for assoc value in `allout-mode-leaders' alist, then use comment-start string, if any, then use default (`.'). \(See note about use of comment-start strings, below.) Set to the symbol for either of `allout-mode-leaders' or `comment-start' to use only one of them, respectively. Value nil means to always use the default (`.') and leave `allout-primary-bullet' unaltered. comment-start strings that do not end in spaces are tripled in the header-prefix, and an `_' underscore is tacked on the end, to distinguish them from regular comment strings. comment-start strings that do end in spaces are not tripled, but an underscore is substituted for the space. [This presumes that the space is for appearance, not comment syntax. You can use `allout-mode-leaders' to override this behavior, when undesired.]" :type '(choice (const t) (const nil) string (const allout-mode-leaders) (const comment-start)) :group 'allout) ;;;###autoload (put 'allout-use-mode-specific-leader 'safe-local-variable '(lambda (x) (or (memq x '(t nil allout-mode-leaders comment-start)) (stringp x)))) ;;;_ = allout-mode-leaders (defvar allout-mode-leaders '() "Specific allout-prefix leading strings per major modes. Use this if the mode's comment-start string isn't what you prefer, or if the mode lacks a comment-start string. See `allout-use-mode-specific-leader' for more details. If you're constructing a string that will comment-out outline structuring so it can be included in program code, append an extra character, like an \"_\" underscore, to distinguish the lead string from regular comments that start at the beginning-of-line.") ;;;_ = allout-old-style-prefixes (defcustom allout-old-style-prefixes nil "*When non-nil, use only old-and-crusty `outline-mode' `*' topic prefixes. Non-nil restricts the topic creation and modification functions to asterix-padded prefixes, so they look exactly like the original Emacs-outline style prefixes. Whatever the setting of this variable, both old and new style prefixes are always respected by the topic maneuvering functions." :type 'boolean :group 'allout) (make-variable-buffer-local 'allout-old-style-prefixes) ;;;###autoload (put 'allout-old-style-prefixes 'safe-local-variable (if (fboundp 'booleanp) 'booleanp '(lambda (x) (member x '(t nil))))) ;;;_ = allout-stylish-prefixes - alternating bullets (defcustom allout-stylish-prefixes t "*Do fancy stuff with topic prefix bullets according to level, etc. Non-nil enables topic creation, modification, and repositioning functions to vary the topic bullet char (the char that marks the topic depth) just preceding the start of the topic text) according to level. Otherwise, only asterisks (`*') and distinctive bullets are used. This is how an outline can look (but sans indentation) with stylish prefixes: * Top level .* A topic . + One level 3 subtopic . . One level 4 subtopic . . A second 4 subtopic . + Another level 3 subtopic . #1 A numbered level 4 subtopic . #2 Another . ! Another level 4 subtopic with a different distinctive bullet . #4 And another numbered level 4 subtopic This would be an outline with stylish prefixes inhibited (but the numbered and other distinctive bullets retained): * Top level .* A topic . * One level 3 subtopic . * One level 4 subtopic . * A second 4 subtopic . * Another level 3 subtopic . #1 A numbered level 4 subtopic . #2 Another . ! Another level 4 subtopic with a different distinctive bullet . #4 And another numbered level 4 subtopic Stylish and constant prefixes (as well as old-style prefixes) are always respected by the topic maneuvering functions, regardless of this variable setting. The setting of this var is not relevant when `allout-old-style-prefixes' is non-nil." :type 'boolean :group 'allout) (make-variable-buffer-local 'allout-stylish-prefixes) ;;;###autoload (put 'allout-stylish-prefixes 'safe-local-variable (if (fboundp 'booleanp) 'booleanp '(lambda (x) (member x '(t nil))))) ;;;_ = allout-numbered-bullet (defcustom allout-numbered-bullet "#" "*String designating bullet of topics that have auto-numbering; nil for none. Topics having this bullet have automatic maintenance of a sibling sequence-number tacked on, just after the bullet. Conventionally set to \"#\", you can set it to a bullet of your choice. A nil value disables numbering maintenance." :type '(choice (const nil) string) :group 'allout) (make-variable-buffer-local 'allout-numbered-bullet) ;;;###autoload (put 'allout-numbered-bullet 'safe-local-variable (if (fboundp 'string-or-null-p) 'string-or-null-p '(lambda (x) (or (stringp x) (null x))))) ;;;_ = allout-file-xref-bullet (defcustom allout-file-xref-bullet "@" "*Bullet signifying file cross-references, for `allout-resolve-xref'. Set this var to the bullet you want to use for file cross-references." :type '(choice (const nil) string) :group 'allout) ;;;###autoload (put 'allout-file-xref-bullet 'safe-local-variable (if (fboundp 'string-or-null-p) 'string-or-null-p '(lambda (x) (or (stringp x) (null x))))) ;;;_ = allout-presentation-padding (defcustom allout-presentation-padding 2 "*Presentation-format white-space padding factor, for greater indent." :type 'integer :group 'allout) (make-variable-buffer-local 'allout-presentation-padding) ;;;###autoload (put 'allout-presentation-padding 'safe-local-variable 'integerp) ;;;_ = allout-abbreviate-flattened-numbering (defcustom allout-abbreviate-flattened-numbering nil "*If non-nil, `allout-flatten-exposed-to-buffer' abbreviates topic numbers to minimal amount with some context. Otherwise, entire numbers are always used." :type 'boolean :group 'allout) ;;;_ + LaTeX formatting ;;;_ - allout-number-pages (defcustom allout-number-pages nil "*Non-nil turns on page numbering for LaTeX formatting of an outline." :type 'boolean :group 'allout) ;;;_ - allout-label-style (defcustom allout-label-style "\\large\\bf" "*Font and size of labels for LaTeX formatting of an outline." :type 'string :group 'allout) ;;;_ - allout-head-line-style (defcustom allout-head-line-style "\\large\\sl " "*Font and size of entries for LaTeX formatting of an outline." :type 'string :group 'allout) ;;;_ - allout-body-line-style (defcustom allout-body-line-style " " "*Font and size of entries for LaTeX formatting of an outline." :type 'string :group 'allout) ;;;_ - allout-title-style (defcustom allout-title-style "\\Large\\bf" "*Font and size of titles for LaTeX formatting of an outline." :type 'string :group 'allout) ;;;_ - allout-title (defcustom allout-title '(or buffer-file-name (buffer-name)) "*Expression to be evaluated to determine the title for LaTeX formatted copy." :type 'sexp :group 'allout) ;;;_ - allout-line-skip (defcustom allout-line-skip ".05cm" "*Space between lines for LaTeX formatting of an outline." :type 'string :group 'allout) ;;;_ - allout-indent (defcustom allout-indent ".3cm" "*LaTeX formatted depth-indent spacing." :type 'string :group 'allout) ;;;_ + Topic encryption ;;;_ = allout-encryption group (defgroup allout-encryption nil "Settings for topic encryption features of allout outliner." :group 'allout) ;;;_ = allout-topic-encryption-bullet (defcustom allout-topic-encryption-bullet "~" "*Bullet signifying encryption of the entry's body." :type '(choice (const nil) string) :version "22.0" :group 'allout-encryption) ;;;_ = allout-passphrase-verifier-handling (defcustom allout-passphrase-verifier-handling t "*Enable use of symmetric encryption passphrase verifier if non-nil. See the docstring for the `allout-enable-file-variable-adjustment' variable for details about allout ajustment of file variables." :type 'boolean :version "22.0" :group 'allout-encryption) (make-variable-buffer-local 'allout-passphrase-verifier-handling) ;;;_ = allout-passphrase-hint-handling (defcustom allout-passphrase-hint-handling 'always "*Dictate outline encryption passphrase reminder handling: always - always show reminder when prompting needed - show reminder on passphrase entry failure disabled - never present or adjust reminder See the docstring for the `allout-enable-file-variable-adjustment' variable for details about allout ajustment of file variables." :type '(choice (const always) (const needed) (const disabled)) :version "22.0" :group 'allout-encryption) (make-variable-buffer-local 'allout-passphrase-hint-handling) ;;;_ = allout-encrypt-unencrypted-on-saves (defcustom allout-encrypt-unencrypted-on-saves t "*When saving, should topics pending encryption be encrypted? The idea is to prevent file-system exposure of any un-encrypted stuff, and mostly covers both deliberate file writes and auto-saves. - Yes: encrypt all topics pending encryption, even if it's the one currently being edited. (In that case, the currently edited topic will be automatically decrypted before any user interaction, so they can continue editing but the copy on the file system will be encrypted.) Auto-saves will use the \"All except current topic\" mode if this one is selected, to avoid practical difficulties - see below. - All except current topic: skip the topic currently being edited, even if it's pending encryption. This may expose the current topic on the file sytem, but avoids the nuisance of prompts for the encryption passphrase in the middle of editing for, eg, autosaves. This mode is used for auto-saves for both this option and \"Yes\". - No: leave it to the user to encrypt any unencrypted topics. For practical reasons, auto-saves always use the 'except-current policy when auto-encryption is enabled. (Otherwise, spurious passphrase prompts and unavoidable timing collisions are too disruptive.) If security for a file requires that even the current topic is never auto-saved in the clear, disable auto-saves for that file." :type '(choice (const :tag "Yes" t) (const :tag "All except current topic" except-current) (const :tag "No" nil)) :version "22.0" :group 'allout-encryption) (make-variable-buffer-local 'allout-encrypt-unencrypted-on-saves) ;;;_ + Developer ;;;_ = allout-developer group (defgroup allout-developer nil "Settings for topic encryption features of allout outliner." :group 'allout) ;;;_ = allout-run-unit-tests-on-load (defcustom allout-run-unit-tests-on-load nil "*When non-nil, unit tests will be run at end of loading the allout module. Generally, allout code developers are the only ones who'll want to set this. \(If set, this makes it an even better practice to exercise changes by doing byte-compilation with a repeat count, so the file is loaded after compilation.) See `allout-run-unit-tests' to see what's run." :type 'boolean :group 'allout-developer) ;;;_ + Miscellaneous customization ;;;_ = allout-command-prefix (defcustom allout-command-prefix "\C-c " "*Key sequence to be used as prefix for outline mode command key bindings. Default is '\C-c'; just '\C-c' is more short-and-sweet, if you're willing to let allout use a bunch of \C-c keybindings." :type 'string :group 'allout) ;;;_ = allout-keybindings-list ;;; You have to reactivate allout-mode - `(allout-mode t)' - to ;;; institute changes to this var. (defvar allout-keybindings-list () "*List of `allout-mode' key / function bindings, for `allout-mode-map'. String or vector key will be prefaced with `allout-command-prefix', unless optional third, non-nil element is present.") (setq allout-keybindings-list '( ; Motion commands: ("\C-n" allout-next-visible-heading) ("\C-p" allout-previous-visible-heading) ("\C-u" allout-up-current-level) ("\C-f" allout-forward-current-level) ("\C-b" allout-backward-current-level) ("\C-a" allout-beginning-of-current-entry) ("\C-e" allout-end-of-entry) ; Exposure commands: ("\C-i" allout-show-children) ("\C-s" allout-show-current-subtree) ("\C-h" allout-hide-current-subtree) ("h" allout-hide-current-subtree) ("\C-o" allout-show-current-entry) ("!" allout-show-all) ("x" allout-toggle-current-subtree-encryption) ; Alteration commands: (" " allout-open-sibtopic) ("." allout-open-subtopic) ("," allout-open-supertopic) ("'" allout-shift-in) (">" allout-shift-in) ("<" allout-shift-out) ("\C-m" allout-rebullet-topic) ("*" allout-rebullet-current-heading) ("#" allout-number-siblings) ("\C-k" allout-kill-line t) ("\M-k" allout-copy-line-as-kill t) ("\C-y" allout-yank t) ("\M-y" allout-yank-pop t) ("\C-k" allout-kill-topic) ("\M-k" allout-copy-topic-as-kill) ; Miscellaneous commands: ;([?\C-\ ] allout-mark-topic) ("@" allout-resolve-xref) ("=c" allout-copy-exposed-to-buffer) ("=i" allout-indented-exposed-to-buffer) ("=t" allout-latexify-exposed) ("=p" allout-flatten-exposed-to-buffer))) ;;;_ = allout-inhibit-auto-fill (defcustom allout-inhibit-auto-fill nil "*If non-nil, auto-fill will be inhibited in the allout buffers. You can customize this setting to set it for all allout buffers, or set it in individual buffers if you want to inhibit auto-fill only in particular buffers. (You could use a function on `allout-mode-hook' to inhibit auto-fill according, eg, to the major mode.) If you don't set this and auto-fill-mode is enabled, allout will use the value that `normal-auto-fill-function', if any, when allout mode starts, or else allout's special hanging-indent maintaining auto-fill function, `allout-auto-fill'." :type 'boolean :group 'allout) (make-variable-buffer-local 'allout-inhibit-auto-fill) ;;;_ = allout-use-hanging-indents (defcustom allout-use-hanging-indents t "*If non-nil, topic body text auto-indent defaults to indent of the header. Ie, it is indented to be just past the header prefix. This is relevant mostly for use with indented-text-mode, or other situations where auto-fill occurs." :type 'boolean :group 'allout) (make-variable-buffer-local 'allout-use-hanging-indents) ;;;###autoload (put 'allout-use-hanging-indents 'safe-local-variable (if (fboundp 'booleanp) 'booleanp '(lambda (x) (member x '(t nil))))) ;;;_ = allout-reindent-bodies (defcustom allout-reindent-bodies (if allout-use-hanging-indents 'text) "*Non-nil enables auto-adjust of topic body hanging indent with depth shifts. When active, topic body lines that are indented even with or beyond their topic header are reindented to correspond with depth shifts of the header. A value of t enables reindent in non-programming-code buffers, ie those that do not have the variable `comment-start' set. A value of `force' enables reindent whether or not `comment-start' is set." :type '(choice (const nil) (const t) (const text) (const force)) :group 'allout) (make-variable-buffer-local 'allout-reindent-bodies) ;;;###autoload (put 'allout-reindent-bodies 'safe-local-variable '(lambda (x) (memq x '(nil t text force)))) ;;;_ = allout-enable-file-variable-adjustment (defcustom allout-enable-file-variable-adjustment t "*If non-nil, some allout outline actions edit Emacs local file var text. This can range from changes to existing entries, addition of new ones, and creation of a new local variables section when necessary. Emacs file variables adjustments are also inhibited if `enable-local-variables' is nil. Operations potentially causing edits include allout encryption routines. For details, see `allout-toggle-current-subtree-encryption's docstring." :type 'boolean :group 'allout) (make-variable-buffer-local 'allout-enable-file-variable-adjustment) ;;;_* CODE - no user customizations below. ;;;_ #1 Internal Outline Formatting and Configuration ;;;_ : Version ;;;_ = allout-version (defvar allout-version "2.2.1" "Version of currently loaded outline package. (allout.el)") ;;;_ > allout-version (defun allout-version (&optional here) "Return string describing the loaded outline version." (interactive "P") (let ((msg (concat "Allout Outline Mode v " allout-version))) (if here (insert msg)) (message "%s" msg) msg)) ;;;_ : Mode activation (defined here because it's referenced early) ;;;_ = allout-mode (defvar allout-mode nil "Allout outline mode minor-mode flag.") (make-variable-buffer-local 'allout-mode) ;;;_ = allout-layout nil (defvar allout-layout nil ; LEAVE GLOBAL VALUE NIL - see docstring. "Buffer-specific setting for allout layout. In buffers where this is non-nil (and if `allout-init' has been run, to enable this behavior), `allout-mode' will be automatically activated. The layout dictated by the value will be used to set the initial exposure when `allout-mode' is activated. \*You should not setq-default this variable non-nil unless you want every visited file to be treated as an allout file.* The value would typically be set by a file local variable. For example, the following lines at the bottom of an Emacs Lisp file: ;;;Local variables: ;;;allout-layout: (0 : -1 -1 0) ;;;End: dictate activation of `allout-mode' mode when the file is visited \(presuming allout-init was already run), followed by the equivalent of `(allout-expose-topic 0 : -1 -1 0)'. (This is the layout used for the allout.el source file.) `allout-default-layout' describes the specification format. `allout-layout' can additionally have the value `t', in which case the value of `allout-default-layout' is used.") (make-variable-buffer-local 'allout-layout) ;;;###autoload (put 'allout-layout 'safe-local-variable '(lambda (x) (or (numberp x) (listp x) (memq x '(: * + -))))) ;;;_ : Topic header format ;;;_ = allout-regexp (defvar allout-regexp "" "*Regular expression to match the beginning of a heading line. Any line whose beginning matches this regexp is considered a heading. This var is set according to the user configuration vars by `set-allout-regexp'.") (make-variable-buffer-local 'allout-regexp) ;;;_ = allout-bullets-string (defvar allout-bullets-string "" "A string dictating the valid set of outline topic bullets. This var should *not* be set by the user - it is set by `set-allout-regexp', and is produced from the elements of `allout-plain-bullets-string' and `allout-distinctive-bullets-string'.") (make-variable-buffer-local 'allout-bullets-string) ;;;_ = allout-bullets-string-len (defvar allout-bullets-string-len 0 "Length of current buffers' `allout-plain-bullets-string'.") (make-variable-buffer-local 'allout-bullets-string-len) ;;;_ = allout-depth-specific-regexp (defvar allout-depth-specific-regexp "" "*Regular expression to match a heading line prefix for a particular depth. This expression is used to search for depth-specific topic headers at depth 2 and greater. Use `allout-depth-one-regexp' for to seek topics at depth one. This var is set according to the user configuration vars by `set-allout-regexp'. It is prepared with format strings for two decimal numbers, which should each be one less than the depth of the topic prefix to be matched.") (make-variable-buffer-local 'allout-depth-specific-regexp) ;;;_ = allout-depth-one-regexp (defvar allout-depth-one-regexp "" "*Regular expression to match a heading line prefix for depth one. This var is set according to the user configuration vars by `set-allout-regexp'. It is prepared with format strings for two decimal numbers, which should each be one less than the depth of the topic prefix to be matched.") (make-variable-buffer-local 'allout-depth-one-regexp) ;;;_ = allout-line-boundary-regexp (defvar allout-line-boundary-regexp () "`allout-regexp' with outline style beginning-of-line anchor. This is properly set by `set-allout-regexp'.") (make-variable-buffer-local 'allout-line-boundary-regexp) ;;;_ = allout-bob-regexp (defvar allout-bob-regexp () "Like `allout-line-boundary-regexp', for headers at beginning of buffer.") (make-variable-buffer-local 'allout-bob-regexp) ;;;_ = allout-header-subtraction (defvar allout-header-subtraction (1- (length allout-header-prefix)) "Allout-header prefix length to subtract when computing topic depth.") (make-variable-buffer-local 'allout-header-subtraction) ;;;_ = allout-plain-bullets-string-len (defvar allout-plain-bullets-string-len (length allout-plain-bullets-string) "Length of `allout-plain-bullets-string', updated by `set-allout-regexp'.") (make-variable-buffer-local 'allout-plain-bullets-string-len) ;;;_ = allout-doublecheck-at-and-shallower (defconst allout-doublecheck-at-and-shallower 2 "Validate apparent topics of this depth and shallower as being non-aberrant. Verified with `allout-aberrant-container-p'. This check's usefulness is limited to shallow depths, because the determination of aberrance is according to the mistaken item being followed by a legitimate item of excessively greater depth.") ;;;_ X allout-reset-header-lead (header-lead) (defun allout-reset-header-lead (header-lead) "*Reset the leading string used to identify topic headers." (interactive "sNew lead string: ") (setq allout-header-prefix header-lead) (setq allout-header-subtraction (1- (length allout-header-prefix))) (set-allout-regexp)) ;;;_ X allout-lead-with-comment-string (header-lead) (defun allout-lead-with-comment-string (&optional header-lead) "*Set the topic-header leading string to specified string. Useful when for encapsulating outline structure in programming language comments. Returns the leading string." (interactive "P") (if (not (stringp header-lead)) (setq header-lead (read-string "String prefix for topic headers: "))) (setq allout-reindent-bodies nil) (allout-reset-header-lead header-lead) header-lead) ;;;_ > allout-infer-header-lead-and-primary-bullet () (defun allout-infer-header-lead-and-primary-bullet () "Determine appropriate `allout-header-prefix' and `allout-primary-bullet'. Works according to settings of: `comment-start' `allout-header-prefix' (default) `allout-use-mode-specific-leader' and `allout-mode-leaders'. Apply this via (re)activation of `allout-mode', rather than invoking it directly." (let* ((use-leader (and (boundp 'allout-use-mode-specific-leader) (if (or (stringp allout-use-mode-specific-leader) (memq allout-use-mode-specific-leader '(allout-mode-leaders comment-start t))) allout-use-mode-specific-leader ;; Oops - garbled value, equate with effect of 't: t))) (leader (cond ((not use-leader) nil) ;; Use the explicitly designated leader: ((stringp use-leader) use-leader) (t (or (and (memq use-leader '(t allout-mode-leaders)) ;; Get it from outline mode leaders? (cdr (assq major-mode allout-mode-leaders))) ;; ... didn't get from allout-mode-leaders... (and (memq use-leader '(t comment-start)) comment-start ;; Use comment-start, maybe tripled, and with ;; underscore: (concat (if (string= " " (substring comment-start (1- (length comment-start)))) ;; Use comment-start, sans trailing space: (substring comment-start 0 -1) (concat comment-start comment-start comment-start)) ;; ... and append underscore, whichever: "_"))))))) (if (not leader) nil (setq allout-header-prefix leader) (if (not allout-old-style-prefixes) ;; setting allout-primary-bullet makes the top level topics use - ;; actually, be - the special prefix: (setq allout-primary-bullet leader)) allout-header-prefix))) (defalias 'allout-infer-header-lead 'allout-infer-header-lead-and-primary-bullet) ;;;_ > allout-infer-body-reindent () (defun allout-infer-body-reindent () "Determine proper setting for `allout-reindent-bodies'. Depends on default setting of `allout-reindent-bodies' (which see) and presence of setting for `comment-start', to tell whether the file is programming code." (if (and allout-reindent-bodies comment-start (not (eq 'force allout-reindent-bodies))) (setq allout-reindent-bodies nil))) ;;;_ > set-allout-regexp () (defun set-allout-regexp () "Generate proper topic-header regexp form for outline functions. Works with respect to `allout-plain-bullets-string' and `allout-distinctive-bullets-string'. Also refresh various data structures that hinge on the regexp." (interactive) ;; Derive allout-bullets-string from user configured components: (setq allout-bullets-string "") (let ((strings (list 'allout-plain-bullets-string 'allout-distinctive-bullets-string 'allout-primary-bullet)) cur-string cur-len cur-char index) (while strings (setq index 0) (setq cur-len (length (setq cur-string (symbol-value (car strings))))) (while (< index cur-len) (setq cur-char (aref cur-string index)) (setq allout-bullets-string (concat allout-bullets-string (cond ; Single dash would denote a ; sequence, repeated denotes ; a dash: ((eq cur-char ?-) "--") ; literal close-square-bracket ; doesn't work right in the ; expr, exclude it: ((eq cur-char ?\]) "") (t (regexp-quote (char-to-string cur-char)))))) (setq index (1+ index))) (setq strings (cdr strings))) ) ;; Derive next for repeated use in allout-pending-bullet: (setq allout-plain-bullets-string-len (length allout-plain-bullets-string)) (setq allout-header-subtraction (1- (length allout-header-prefix))) (let (new-part old-part) (setq new-part (concat "\\(" (regexp-quote allout-header-prefix) "[ \t]*" ;; already regexp-quoted in a custom way: "[" allout-bullets-string "]" "\\)") old-part (concat "\\(" (regexp-quote allout-primary-bullet) "\\|" (regexp-quote allout-header-prefix) "\\)" "+" " ?[^" allout-primary-bullet "]") allout-regexp (concat new-part "\\|" old-part "\\|\^l") allout-line-boundary-regexp (concat "\n" new-part "\\|" "\n" old-part) allout-bob-regexp (concat "\\`" new-part "\\|" "\\`" old-part)) (setq allout-depth-specific-regexp (concat "\\(^\\|\\`\\)" "\\(" ;; new-style spacers-then-bullet string: "\\(" (allout-format-quote (regexp-quote allout-header-prefix)) " \\{%s\\}" "[" (allout-format-quote allout-bullets-string) "]" "\\)" ;; old-style all-bullets string, if primary not multi-char: (if (< 0 allout-header-subtraction) "" (concat "\\|\\(" (allout-format-quote (regexp-quote allout-primary-bullet)) (allout-format-quote (regexp-quote allout-primary-bullet)) (allout-format-quote (regexp-quote allout-primary-bullet)) "\\{%s\\}" ;; disqualify greater depths: "[^" (allout-format-quote allout-primary-bullet) "]\\)" )) "\\)" )) (setq allout-depth-one-regexp (concat "\\(^\\|\\`\\)" "\\(" "\\(" (regexp-quote allout-header-prefix) ;; disqualify any bullet char following any amount of ;; intervening whitespace: " *" (concat "[^ " allout-bullets-string "]") "\\)" (if (< 0 allout-header-subtraction) ;; Need not support anything like the old ;; bullet style if the prefix is multi-char. "" (concat "\\|" (regexp-quote allout-primary-bullet) ;; disqualify deeper primary-bullet sequences: "[^" allout-primary-bullet "]")) "\\)" )))) ;;;_ : Key bindings ;;;_ = allout-mode-map (defvar allout-mode-map nil "Keybindings for (allout) outline minor mode.") ;;;_ > produce-allout-mode-map (keymap-alist &optional base-map) (defun produce-allout-mode-map (keymap-list &optional base-map) "Produce keymap for use as allout-mode-map, from KEYMAP-LIST. Built on top of optional BASE-MAP, or empty sparse map if none specified. See doc string for allout-keybindings-list for format of binding list." (let ((map (or base-map (make-sparse-keymap))) (pref (list allout-command-prefix))) (mapcar (function (lambda (cell) (let ((add-pref (null (cdr (cdr cell)))) (key-suff (list (car cell)))) (apply 'define-key (list map (apply 'concat (if add-pref (append pref key-suff) key-suff)) (car (cdr cell))))))) keymap-list) map)) ;;;_ : Menu bar (defvar allout-mode-exposure-menu) (defvar allout-mode-editing-menu) (defvar allout-mode-navigation-menu) (defvar allout-mode-misc-menu) (defun produce-allout-mode-menubar-entries () (require 'easymenu) (easy-menu-define allout-mode-exposure-menu allout-mode-map "Allout outline exposure menu." '("Exposure" ["Show Entry" allout-show-current-entry t] ["Show Children" allout-show-children t] ["Show Subtree" allout-show-current-subtree t] ["Hide Subtree" allout-hide-current-subtree t] ["Hide Leaves" allout-hide-current-leaves t] "----" ["Show All" allout-show-all t])) (easy-menu-define allout-mode-editing-menu allout-mode-map "Allout outline editing menu." '("Headings" ["Open Sibling" allout-open-sibtopic t] ["Open Subtopic" allout-open-subtopic t] ["Open Supertopic" allout-open-supertopic t] "----" ["Shift Topic In" allout-shift-in t] ["Shift Topic Out" allout-shift-out t] ["Rebullet Topic" allout-rebullet-topic t] ["Rebullet Heading" allout-rebullet-current-heading t] ["Number Siblings" allout-number-siblings t] "----" ["Toggle Topic Encryption" allout-toggle-current-subtree-encryption (> (allout-current-depth) 1)])) (easy-menu-define allout-mode-navigation-menu allout-mode-map "Allout outline navigation menu." '("Navigation" ["Next Visible Heading" allout-next-visible-heading t] ["Previous Visible Heading" allout-previous-visible-heading t] "----" ["Up Level" allout-up-current-level t] ["Forward Current Level" allout-forward-current-level t] ["Backward Current Level" allout-backward-current-level t] "----" ["Beginning of Entry" allout-beginning-of-current-entry t] ["End of Entry" allout-end-of-entry t] ["End of Subtree" allout-end-of-current-subtree t])) (easy-menu-define allout-mode-misc-menu allout-mode-map "Allout outlines miscellaneous bindings." '("Misc" ["Version" allout-version t] "----" ["Duplicate Exposed" allout-copy-exposed-to-buffer t] ["Duplicate Exposed, numbered" allout-flatten-exposed-to-buffer t] ["Duplicate Exposed, indented" allout-indented-exposed-to-buffer t] "----" ["Set Header Lead" allout-reset-header-lead t] ["Set New Exposure" allout-expose-topic t]))) ;;;_ : Allout Modal-Variables Utilities ;;;_ = allout-mode-prior-settings (defvar allout-mode-prior-settings nil "Internal `allout-mode' use; settings to be resumed on mode deactivation. See `allout-add-resumptions' and `allout-do-resumptions'.") (make-variable-buffer-local 'allout-mode-prior-settings) ;;;_ > allout-add-resumptions (&rest pairs) (defun allout-add-resumptions (&rest pairs) "Set name/value PAIRS. Old settings are preserved for later resumption using `allout-do-resumptions'. The new values are set as a buffer local. On resumption, the prior buffer scope of the variable is restored along with its value. If it was a void buffer-local value, then it is left as nil on resumption. The pairs are lists whose car is the name of the variable and car of the cdr is the new value: '(some-var some-value)'. The pairs can actually be triples, where the third element qualifies the disposition of the setting, as described further below. If the optional third element is the symbol 'extend, then the new value created by `cons'ing the second element of the pair onto the front of the existing value. If the optional third element is the symbol 'append, then the new value is extended from the existing one by `append'ing a list containing the second element of the pair onto the end of the existing value. Extension, and resumptions in general, should not be used for hook functions - use the 'local mode of `add-hook' for that, instead. The settings are stored on `allout-mode-prior-settings'." (while pairs (let* ((pair (pop pairs)) (name (car pair)) (value (cadr pair)) (qualifier (if (> (length pair) 2) (caddr pair))) prior-value) (if (not (symbolp name)) (error "Pair's name, %S, must be a symbol, not %s" name (type-of name))) (setq prior-value (condition-case nil (symbol-value name) (void-variable nil))) (when (not (assoc name allout-mode-prior-settings)) ;; Not already added as a resumption, create the prior setting entry. (if (local-variable-p name) ;; is already local variable - preserve the prior value: (push (list name prior-value) allout-mode-prior-settings) ;; wasn't local variable, indicate so for resumption by killing ;; local value, and make it local: (push (list name) allout-mode-prior-settings) (make-local-variable name))) (if qualifier (cond ((eq qualifier 'extend) (if (not (listp prior-value)) (error "extension of non-list prior value attempted") (set name (cons value prior-value)))) ((eq qualifier 'append) (if (not (listp prior-value)) (error "appending of non-list prior value attempted") (set name (append prior-value (list value))))) (t (error "unrecognized setting qualifier `%s' encountered" qualifier))) (set name value))))) ;;;_ > allout-do-resumptions () (defun allout-do-resumptions () "Resume all name/value settings registered by `allout-add-resumptions'. This is used when concluding allout-mode, to resume selected variables to their settings before allout-mode was started." (while allout-mode-prior-settings (let* ((pair (pop allout-mode-prior-settings)) (name (car pair)) (value-cell (cdr pair))) (if (not value-cell) ;; Prior value was global: (kill-local-variable name) ;; Prior value was explicit: (set name (car value-cell)))))) ;;;_ : Mode-specific incidentals ;;;_ > allout-unprotected (expr) (defmacro allout-unprotected (expr) "Enable internal outline operations to alter invisible text." `(let ((inhibit-read-only (if (not buffer-read-only) t)) (inhibit-field-text-motion t)) ,expr)) ;;;_ = allout-mode-hook (defvar allout-mode-hook nil "*Hook that's run when allout mode starts.") ;;;_ = allout-mode-deactivate-hook (defvar allout-mode-deactivate-hook nil "*Hook that's run when allout mode ends.") ;;;_ = allout-exposure-category (defvar allout-exposure-category nil "Symbol for use as allout invisible-text overlay category.") ;;;_ x allout-view-change-hook (defvar allout-view-change-hook nil "*(Deprecated) A hook run after allout outline exposure changes. Switch to using `allout-exposure-change-hook' instead. Both hooks are currently respected, but the other conveys the details of the exposure change via explicit parameters, and this one will eventually be disabled in a subsequent allout version.") ;;;_ = allout-exposure-change-hook (defvar allout-exposure-change-hook nil "*Hook that's run after allout outline subtree exposure changes. It is run at the conclusion of `allout-flag-region'. Functions on the hook must take three arguments: - from - integer indicating the point at the start of the change. - to - integer indicating the point of the end of the change. - flag - change mode: nil for exposure, otherwise concealment. This hook might be invoked multiple times by a single command. This hook is replacing `allout-view-change-hook', which is being deprecated and eventually will not be invoked.") ;;;_ = allout-structure-added-hook (defvar allout-structure-added-hook nil "*Hook that's run after addition of items to the outline. Functions on the hook should take two arguments: - new-start - integer indicating the point at the start of the first new item. - new-end - integer indicating the point of the end of the last new item. Some edits that introduce new items may missed by this hook - specifically edits that native allout routines do not control. This hook might be invoked multiple times by a single command.") ;;;_ = allout-structure-deleted-hook (defvar allout-structure-deleted-hook nil "*Hook that's run after disciplined deletion of subtrees from the outline. Functions on the hook must take two arguments: - depth - integer indicating the depth of the subtree that was deleted. - removed-from - integer indicating the point where the subtree was removed. Some edits that remove or invalidate items may missed by this hook - specifically edits that native allout routines do not control. This hook might be invoked multiple times by a single command.") ;;;_ = allout-structure-shifted-hook (defvar allout-structure-shifted-hook nil "*Hook that's run after shifting of items in the outline. Functions on the hook should take two arguments: - depth-change - integer indicating depth increase, negative for decrease - start - integer indicating the start point of the shifted parent item. Some edits that shift items can be missed by this hook - specifically edits that native allout routines do not control. This hook might be invoked multiple times by a single command.") ;;;_ = allout-outside-normal-auto-fill-function (defvar allout-outside-normal-auto-fill-function nil "Value of normal-auto-fill-function outside of allout mode. Used by allout-auto-fill to do the mandated normal-auto-fill-function wrapped within allout's automatic fill-prefix setting.") (make-variable-buffer-local 'allout-outside-normal-auto-fill-function) ;;;_ = file-var-bug hack (defvar allout-v18/19-file-var-hack nil "Horrible hack used to prevent invalid multiple triggering of outline mode from prop-line file-var activation. Used by `allout-mode' function to track repeats.") ;;;_ = allout-passphrase-verifier-string (defvar allout-passphrase-verifier-string nil "Setting used to test solicited encryption passphrases against the one already associated with a file. It consists of an encrypted random string useful only to verify that a passphrase entered by the user is effective for decryption. The passphrase itself is \*not* recorded in the file anywhere, and the encrypted contents are random binary characters to avoid exposing greater susceptibility to search attacks. The verifier string is retained as an Emacs file variable, as well as in the Emacs buffer state, if file variable adjustments are enabled. See `allout-enable-file-variable-adjustment' for details about that.") (make-variable-buffer-local 'allout-passphrase-verifier-string) ;;;###autoload (put 'allout-passphrase-verifier-string 'safe-local-variable 'stringp) ;;;_ = allout-passphrase-hint-string (defvar allout-passphrase-hint-string "" "Variable used to retain reminder string for file's encryption passphrase. See the description of `allout-passphrase-hint-handling' for details about how the reminder is deployed. The hint is retained as an Emacs file variable, as well as in the Emacs buffer state, if file variable adjustments are enabled. See `allout-enable-file-variable-adjustment' for details about that.") (make-variable-buffer-local 'allout-passphrase-hint-string) (setq-default allout-passphrase-hint-string "") ;;;###autoload (put 'allout-passphrase-hint-string 'safe-local-variable 'stringp) ;;;_ = allout-after-save-decrypt (defvar allout-after-save-decrypt nil "Internal variable, is nil or has the value of two points: - the location of a topic to be decrypted after saving is done - where to situate the cursor after the decryption is performed This is used to decrypt the topic that was currently being edited, if it was encrypted automatically as part of a file write or autosave.") (make-variable-buffer-local 'allout-after-save-decrypt) ;;;_ = allout-encryption-plaintext-sanitization-regexps (defvar allout-encryption-plaintext-sanitization-regexps nil "List of regexps whose matches are removed from plaintext before encryption. This is for the sake of removing artifacts, like escapes, that are added on and not actually part of the original plaintext. The removal is done just prior to encryption. Entries must be symbols that are bound to the desired values. Each value can be a regexp or a list with a regexp followed by a substitution string. If it's just a regexp, all its matches are removed before the text is encrypted. If it's a regexp and a substitution, the substition is used against the regexp matches, a la `replace-match'.") (make-variable-buffer-local 'allout-encryption-text-removal-regexps) ;;;_ = allout-encryption-ciphertext-rejection-regexps (defvar allout-encryption-ciphertext-rejection-regexps nil "Variable for regexps matching plaintext to remove before encryption. This is for the sake of redoing encryption in cases where the ciphertext incidentally contains strings that would disrupt mode operation - for example, a line that happens to look like an allout-mode topic prefix. Entries must be symbols that are bound to the desired regexp values. The encryption will be retried up to `allout-encryption-ciphertext-rejection-limit' times, after which an error is raised.") (make-variable-buffer-local 'allout-encryption-ciphertext-rejection-regexps) ;;;_ = allout-encryption-ciphertext-rejection-ceiling (defvar allout-encryption-ciphertext-rejection-ceiling 5 "Limit on number of times encryption ciphertext is rejected. See `allout-encryption-ciphertext-rejection-regexps' for rejection reasons.") (make-variable-buffer-local 'allout-encryption-ciphertext-rejection-ceiling) ;;;_ > allout-mode-p () ;; Must define this macro above any uses, or byte compilation will lack ;; proper def, if file isn't loaded - eg, during emacs build! (defmacro allout-mode-p () "Return t if `allout-mode' is active in current buffer." 'allout-mode) ;;;_ > allout-write-file-hook-handler () (defun allout-write-file-hook-handler () "Implement `allout-encrypt-unencrypted-on-saves' policy for file writes." (if (or (not (allout-mode-p)) (not (boundp 'allout-encrypt-unencrypted-on-saves)) (not allout-encrypt-unencrypted-on-saves)) nil (let ((except-mark (and (equal allout-encrypt-unencrypted-on-saves 'except-current) (point-marker)))) (if (save-excursion (goto-char (point-min)) (allout-next-topic-pending-encryption except-mark)) (progn (message "auto-encrypting pending topics") (sit-for 0) (condition-case failure (setq allout-after-save-decrypt (allout-encrypt-decrypted except-mark)) (error (progn (message "allout-write-file-hook-handler suppressing error %s" failure) (sit-for 2)))))) )) nil) ;;;_ > allout-auto-save-hook-handler () (defun allout-auto-save-hook-handler () "Implement `allout-encrypt-unencrypted-on-saves' policy for auto save." (if (and (allout-mode-p) allout-encrypt-unencrypted-on-saves) ;; Always implement 'except-current policy when enabled. (let ((allout-encrypt-unencrypted-on-saves 'except-current)) (allout-write-file-hook-handler)))) ;;;_ > allout-after-saves-handler () (defun allout-after-saves-handler () "Decrypt topic encrypted for save, if it's currently being edited. Ie, if it was pending encryption and contained the point in its body before the save. We use values stored in `allout-after-save-decrypt' to locate the topic and the place for the cursor after the decryption is done." (if (not (and (allout-mode-p) (boundp 'allout-after-save-decrypt) allout-after-save-decrypt)) t (goto-char (car allout-after-save-decrypt)) (let ((was-modified (buffer-modified-p))) (allout-toggle-subtree-encryption) (if (not was-modified) (set-buffer-modified-p nil))) (goto-char (cadr allout-after-save-decrypt)) (setq allout-after-save-decrypt nil)) ) ;;;_ = allout-inhibit-aberrance-doublecheck nil ;; In some exceptional moments, disparate topic depths need to be allowed ;; momentarily, eg when one topic is being yanked into another and they're ;; about to be reconciled. let-binding allout-inhibit-aberrance-doublecheck ;; prevents the aberrance doublecheck to allow, eg, the reconciliation ;; processing to happen in the presence of such discrepancies. It should ;; almost never be needed, however. (defvar allout-inhibit-aberrance-doublecheck nil "Internal state, for momentarily inhibits aberrance doublecheck. This should only be momentarily let-bound non-nil, not set non-nil in a lasting way.") ;;;_ #2 Mode activation ;;;_ = allout-explicitly-deactivated (defvar allout-explicitly-deactivated nil "If t, `allout-mode's last deactivation was deliberate. So `allout-post-command-business' should not reactivate it...") (make-variable-buffer-local 'allout-explicitly-deactivated) ;;;_ > allout-init (&optional mode) (defun allout-init (&optional mode) "Prime `allout-mode' to enable/disable auto-activation, wrt `allout-layout'. MODE is one of the following symbols: - nil (or no argument) deactivate auto-activation/layout; - `activate', enable auto-activation only; - `ask', enable auto-activation, and enable auto-layout but with confirmation for layout operation solicited from user each time; - `report', just report and return the current auto-activation state; - anything else (eg, t) for auto-activation and auto-layout, without any confirmation check. Use this function to setup your Emacs session for automatic activation of allout outline mode, contingent to the buffer-specific setting of the `allout-layout' variable. (See `allout-layout' and `allout-expose-topic' docstrings for more details on auto layout). `allout-init' works by setting up (or removing) the `allout-mode' find-file-hook, and giving `allout-auto-activation' a suitable setting. To prime your Emacs session for full auto-outline operation, include the following two lines in your Emacs init file: \(require 'allout) \(allout-init t)" (interactive) (if (interactive-p) (progn (setq mode (completing-read (concat "Select outline auto setup mode " "(empty for report, ? for options) ") '(("nil")("full")("activate")("deactivate") ("ask") ("report") ("")) nil t)) (if (string= mode "") (setq mode 'report) (setq mode (intern-soft mode))))) (let ;; convenience aliases, for consistent ref to respective vars: ((hook 'allout-find-file-hook) (find-file-hook-var-name (if (boundp 'find-file-hook) 'find-file-hook 'find-file-hooks)) (curr-mode 'allout-auto-activation)) (cond ((not mode) (set find-file-hook-var-name (delq hook (symbol-value find-file-hook-var-name))) (if (interactive-p) (message "Allout outline mode auto-activation inhibited."))) ((eq mode 'report) (if (not (memq hook (symbol-value find-file-hook-var-name))) (allout-init nil) ;; Just punt and use the reports from each of the modes: (allout-init (symbol-value curr-mode)))) (t (add-hook find-file-hook-var-name hook) (set curr-mode ; `set', not `setq'! (cond ((eq mode 'activate) (message "Outline mode auto-activation enabled.") 'activate) ((eq mode 'report) ;; Return the current mode setting: (allout-init mode)) ((eq mode 'ask) (message (concat "Outline mode auto-activation and " "-layout (upon confirmation) enabled.")) 'ask) ((message "Outline mode auto-activation and -layout enabled.") 'full))))))) ;;;_ > allout-setup-menubar () (defun allout-setup-menubar () "Populate the current buffer's menubar with `allout-mode' stuff." (let ((menus (list allout-mode-exposure-menu allout-mode-editing-menu allout-mode-navigation-menu allout-mode-misc-menu)) cur) (while menus (setq cur (car menus) menus (cdr menus)) (easy-menu-add cur)))) ;;;_ > allout-overlay-preparations (defun allout-overlay-preparations () "Set the properties of the allout invisible-text overlay and others." (setplist 'allout-exposure-category nil) (put 'allout-exposure-category 'invisible 'allout) (put 'allout-exposure-category 'evaporate t) ;; XXX We use isearch-open-invisible *and* isearch-mode-end-hook. The ;; latter would be sufficient, but it seems that a separate behavior - ;; the _transient_ opening of invisible text during isearch - is keyed to ;; presence of the isearch-open-invisible property - even though this ;; property controls the isearch _arrival_ behavior. This is the case at ;; least in emacs 21, 22.0, and xemacs 21.4. (put 'allout-exposure-category 'isearch-open-invisible 'allout-isearch-end-handler) (if (featurep 'xemacs) (put 'allout-exposure-category 'start-open t) (put 'allout-exposure-category 'insert-in-front-hooks '(allout-overlay-insert-in-front-handler))) (put 'allout-exposure-category 'modification-hooks '(allout-overlay-interior-modification-handler))) ;;;_ > allout-mode (&optional toggle) ;;;_ : Defun: ;;;###autoload (defun allout-mode (&optional toggle) ;;;_ . Doc string: "Toggle minor mode for controlling exposure and editing of text outlines. \\ Optional arg forces mode to re-initialize iff arg is positive num or symbol. Allout outline mode always runs as a minor mode. Allout outline mode provides extensive outline oriented formatting and manipulation. It enables structural editing of outlines, as well as navigation and exposure. It also is specifically aimed at accommodating syntax-sensitive text like programming languages. (For an example, see the allout code itself, which is organized as an allout outline.) In addition to typical outline navigation and exposure, allout includes: - topic-oriented authoring, including keystroke-based topic creation, repositioning, promotion/demotion, cut, and paste - incremental search with dynamic exposure and reconcealment of hidden text - adjustable format, so programming code can be developed in outline-structure - easy topic encryption and decryption - \"Hot-spot\" operation, for single-keystroke maneuvering and exposure control - integral outline layout, for automatic initial exposure when visiting a file - independent extensibility, using comprehensive exposure and authoring hooks and many other features. Below is a description of the key bindings, and then explanation of special `allout-mode' features and terminology. See also the outline menubar additions for quick reference to many of the features, and see the docstring of the function `allout-init' for instructions on priming your emacs session for automatic activation of `allout-mode'. The bindings are dictated by the customizable `allout-keybindings-list' variable. We recommend customizing `allout-command-prefix' to use just `\\C-c' as the command prefix, if the allout bindings don't conflict with any personal bindings you have on \\C-c. In any case, outline structure navigation and authoring is simplified by positioning the cursor on an item's bullet character, the \"hot-spot\" - then you can invoke allout commands with just the un-prefixed, un-control-shifted command letters. This is described further in the HOT-SPOT Operation section. Exposure Control: ---------------- \\[allout-hide-current-subtree] `allout-hide-current-subtree' \\[allout-show-children] `allout-show-children' \\[allout-show-current-subtree] `allout-show-current-subtree' \\[allout-show-current-entry] `allout-show-current-entry' \\[allout-show-all] `allout-show-all' Navigation: ---------- \\[allout-next-visible-heading] `allout-next-visible-heading' \\[allout-previous-visible-heading] `allout-previous-visible-heading' \\[allout-up-current-level] `allout-up-current-level' \\[allout-forward-current-level] `allout-forward-current-level' \\[allout-backward-current-level] `allout-backward-current-level' \\[allout-end-of-entry] `allout-end-of-entry' \\[allout-beginning-of-current-entry] `allout-beginning-of-current-entry' (alternately, goes to hot-spot) \\[allout-beginning-of-line] `allout-beginning-of-line' - like regular beginning-of-line, but if immediately repeated cycles to the beginning of the current item and then to the hot-spot (if `allout-beginning-of-line-cycles' is set). Topic Header Production: ----------------------- \\[allout-open-sibtopic] `allout-open-sibtopic' Create a new sibling after current topic. \\[allout-open-subtopic] `allout-open-subtopic' ... an offspring of current topic. \\[allout-open-supertopic] `allout-open-supertopic' ... a sibling of the current topic's parent. Topic Level and Prefix Adjustment: --------------------------------- \\[allout-shift-in] `allout-shift-in' Shift current topic and all offspring deeper \\[allout-shift-out] `allout-shift-out' ... less deep \\[allout-rebullet-current-heading] `allout-rebullet-current-heading' Prompt for alternate bullet for current topic \\[allout-rebullet-topic] `allout-rebullet-topic' Reconcile bullets of topic and its' offspring - distinctive bullets are not changed, others are alternated according to nesting depth. \\[allout-number-siblings] `allout-number-siblings' Number bullets of topic and siblings - the offspring are not affected. With repeat count, revoke numbering. Topic-oriented Killing and Yanking: ---------------------------------- \\[allout-kill-topic] `allout-kill-topic' Kill current topic, including offspring. \\[allout-copy-topic-as-kill] `allout-copy-topic-as-kill' Copy current topic, including offspring. \\[allout-kill-line] `allout-kill-line' kill-line, attending to outline structure. \\[allout-copy-line-as-kill] `allout-copy-line-as-kill' Copy line but don't delete it. \\[allout-yank] `allout-yank' Yank, adjusting depth of yanked topic to depth of heading if yanking into bare topic heading (ie, prefix sans text). \\[allout-yank-pop] `allout-yank-pop' Is to allout-yank as yank-pop is to yank Topic-oriented Encryption: ------------------------- \\[allout-toggle-current-subtree-encryption] `allout-toggle-current-subtree-encryption' Encrypt/Decrypt topic content Misc commands: ------------- M-x outlineify-sticky Activate outline mode for current buffer, and establish a default file-var setting for `allout-layout'. \\[allout-mark-topic] `allout-mark-topic' \\[allout-copy-exposed-to-buffer] `allout-copy-exposed-to-buffer' Duplicate outline, sans concealed text, to buffer with name derived from derived from that of current buffer - \"*BUFFERNAME exposed*\". \\[allout-flatten-exposed-to-buffer] `allout-flatten-exposed-to-buffer' Like above 'copy-exposed', but convert topic prefixes to section.subsection... numeric format. \\[eval-expression] (allout-init t) Setup Emacs session for outline mode auto-activation. Topic Encryption Outline mode supports gpg encryption of topics, with support for symmetric and key-pair modes, passphrase timeout, passphrase consistency checking, user-provided hinting for symmetric key mode, and auto-encryption of topics pending encryption on save. Topics pending encryption are, by default, automatically encrypted during file saves. If the contents of the topic containing the cursor was encrypted for a save, it is automatically decrypted for continued editing. The aim of these measures is reliable topic privacy while preventing accidents like neglected encryption before saves, forgetting which passphrase was used, and other practical pitfalls. See `allout-toggle-current-subtree-encryption' function docstring and `allout-encrypt-unencrypted-on-saves' customization variable for details. HOT-SPOT Operation Hot-spot operation provides a means for easy, single-keystroke outline navigation and exposure control. When the text cursor is positioned directly on the bullet character of a topic, regular characters (a to z) invoke the commands of the corresponding allout-mode keymap control chars. For example, \"f\" would invoke the command typically bound to \"C-cC-f\" \(\\[allout-forward-current-level] `allout-forward-current-level'). Thus, by positioning the cursor on a topic bullet, you can execute the outline navigation and manipulation commands with a single keystroke. Regular navigation keys (eg, \\[forward-char], \\[next-line]) don't get this special translation, so you can use them to get out of the hot-spot and back to normal editing operation. In allout-mode, the normal beginning-of-line command (\\[allout-beginning-of-line]]) is replaced with one that makes it easy to get to the hot-spot. If you repeat it immediately it cycles (if `allout-beginning-of-line-cycles' is set) to the beginning of the item and then, if you hit it again immediately, to the hot-spot. Similarly, `allout-beginning-of-current-entry' \(\\[allout-beginning-of-current-entry]) moves to the hot-spot when the cursor is already located at the beginning of the current entry. Extending Allout Allout exposure and authoring activites all have associated hooks, by which independent code can cooperate with allout without changes to the allout core. Here are key ones: `allout-mode-hook' `allout-mode-deactivate-hook' `allout-exposure-change-hook' `allout-structure-added-hook' `allout-structure-deleted-hook' `allout-structure-shifted-hook' Terminology Topic hierarchy constituents - TOPICS and SUBTOPICS: ITEM: A unitary outline element, including the HEADER and ENTRY text. TOPIC: An ITEM and any ITEMs contained within it, ie having greater DEPTH and with no intervening items of lower DEPTH than the container. CURRENT ITEM: The visible ITEM most immediately containing the cursor. DEPTH: The degree of nesting of an ITEM; it increases with containment. The DEPTH is determined by the HEADER PREFIX. The DEPTH is also called the: LEVEL: The same as DEPTH. ANCESTORS: Those ITEMs whose TOPICs contain an ITEM. PARENT: An ITEM's immediate ANCESTOR. It has a DEPTH one less than that of the ITEM. OFFSPRING: The ITEMs contained within an ITEM's TOPIC. SUBTOPIC: An OFFSPRING of its ANCESTOR TOPICs. CHILD: An immediate SUBTOPIC of its PARENT. SIBLINGS: TOPICs having the same PARENT and DEPTH. Topic text constituents: HEADER: The first line of an ITEM, include the ITEM PREFIX and HEADER text. ENTRY: The text content of an ITEM, before any OFFSPRING, but including the HEADER text and distinct from the ITEM PREFIX. BODY: Same as ENTRY. PREFIX: The leading text of an ITEM which distinguishes it from normal ENTRY text. Allout recognizes the outline structure according to the strict PREFIX format. It consists of a PREFIX-LEAD string, PREFIX-PADDING, and a BULLET. The BULLET might be followed by a number, indicating the ordinal number of the topic among its siblings, or an asterisk indicating encryption, plus an optional space. After that is the ITEM HEADER text, which is not part of the PREFIX. The relative length of the PREFIX determines the nesting DEPTH of the ITEM. PREFIX-LEAD: The string at the beginning of a HEADER PREFIX, by default a `.'. It can be customized by changing the setting of `allout-header-prefix' and then reinitializing `allout-mode'. When the PREFIX-LEAD is set to the comment-string of a programming language, outline structuring can be embedded in program code without interfering with processing of the text (by emacs or the language processor) as program code. This setting happens automatically when allout mode is used in programming-mode buffers. See `allout-use-mode-specific-leader' docstring for more detail. PREFIX-PADDING: Spaces or asterisks which separate the PREFIX-LEAD and the bullet, determining the ITEM's DEPTH. BULLET: A character at the end of the ITEM PREFIX, it must be one of the characters listed on `allout-plain-bullets-string' or `allout-distinctive-bullets-string'. When creating a TOPIC, plain BULLETs are by default used, according to the DEPTH of the TOPIC. Choice among the distinctive BULLETs is offered when you provide a universal argugment \(\\[universal-argument]) to the TOPIC creation command, or when explictly rebulleting a TOPIC. The significance of the various distinctive bullets is purely by convention. See the documentation for the above bullet strings for more details. EXPOSURE: The state of a TOPIC which determines the on-screen visibility of its OFFSPRING and contained ENTRY text. CONCEALED: TOPICs and ENTRY text whose EXPOSURE is inhibited. Concealed text is represented by \"...\" ellipses. CONCEALED TOPICs are effectively collapsed within an ANCESTOR. CLOSED: A TOPIC whose immediate OFFSPRING and body-text is CONCEALED. OPEN: A TOPIC that is not CLOSED, though its OFFSPRING or BODY may be." ;;;_ . Code (interactive "P") (let* ((active (and (not (equal major-mode 'outline)) (allout-mode-p))) ; Massage universal-arg `toggle' val: (toggle (and toggle (or (and (listp toggle)(car toggle)) toggle))) ; Activation specifically demanded? (explicit-activation (and toggle (or (symbolp toggle) (and (wholenump toggle) (not (zerop toggle)))))) ;; allout-mode already called once during this complex command? (same-complex-command (eq allout-v18/19-file-var-hack (car command-history))) (write-file-hook-var-name (cond ((boundp 'write-file-functions) 'write-file-functions) ((boundp 'write-file-hooks) 'write-file-hooks) (t 'local-write-file-hooks))) do-layout ) ; See comments below re v19.18,.19 bug. (setq allout-v18/19-file-var-hack (car command-history)) (cond ;; Provision for v19.18, 19.19 bug - ;; Emacs v 19.18, 19.19 file-var code invokes prop-line-designated ;; modes twice when file is visited. We have to avoid toggling mode ;; off on second invocation, so we detect it as best we can, and ;; skip everything. ((and same-complex-command ; Still in same complex command ; as last time `allout-mode' invoked. active ; Already activated. (not explicit-activation) ; Prop-line file-vars don't have args. (string-match "^19.1[89]" ; Bug only known to be in v19.18 and emacs-version)); 19.19. t) ;; Deactivation: ((and (not explicit-activation) (or active toggle)) ; Activation not explicitly ; requested, and either in ; active state or *de*activation ; specifically requested: (setq allout-explicitly-deactivated t) (allout-do-resumptions) (remove-from-invisibility-spec '(allout . t)) (remove-hook 'pre-command-hook 'allout-pre-command-business t) (remove-hook 'post-command-hook 'allout-post-command-business t) (remove-hook 'before-change-functions 'allout-before-change-handler t) (remove-hook 'isearch-mode-end-hook 'allout-isearch-end-handler t) (remove-hook write-file-hook-var-name 'allout-write-file-hook-handler t) (remove-hook 'auto-save-hook 'allout-auto-save-hook-handler t) (remove-overlays (point-min) (point-max) 'category 'allout-exposure-category) (setq allout-mode nil) (run-hooks 'allout-mode-deactivate-hook)) ;; Activation: ((not active) (setq allout-explicitly-deactivated nil) (if allout-old-style-prefixes ;; Inhibit all the fancy formatting: (allout-add-resumptions '(allout-primary-bullet "*"))) (allout-overlay-preparations) ; Doesn't hurt to redo this. (allout-infer-header-lead-and-primary-bullet) (allout-infer-body-reindent) (set-allout-regexp) (allout-add-resumptions '(allout-encryption-ciphertext-rejection-regexps allout-line-boundary-regexp extend) '(allout-encryption-ciphertext-rejection-regexps allout-bob-regexp extend)) ;; Produce map from current version of allout-keybindings-list: (allout-setup-mode-map) (produce-allout-mode-menubar-entries) ;; Include on minor-mode-map-alist, if not already there: (if (not (member '(allout-mode . allout-mode-map) minor-mode-map-alist)) (setq minor-mode-map-alist (cons '(allout-mode . allout-mode-map) minor-mode-map-alist))) (add-to-invisibility-spec '(allout . t)) (allout-add-resumptions '(line-move-ignore-invisible t)) (add-hook 'pre-command-hook 'allout-pre-command-business nil t) (add-hook 'post-command-hook 'allout-post-command-business nil t) (add-hook 'before-change-functions 'allout-before-change-handler nil t) (add-hook 'isearch-mode-end-hook 'allout-isearch-end-handler nil t) (add-hook write-file-hook-var-name 'allout-write-file-hook-handler nil t) (add-hook 'auto-save-hook 'allout-auto-save-hook-handler nil t) ;; Stash auto-fill settings and adjust so custom allout auto-fill ;; func will be used if auto-fill is active or activated. (The ;; custom func respects topic headline, maintains hanging-indents, ;; etc.) (if (and auto-fill-function (not allout-inhibit-auto-fill)) ;; allout-auto-fill will use the stashed values and so forth. (allout-add-resumptions '(auto-fill-function allout-auto-fill))) (allout-add-resumptions (list 'allout-former-auto-filler auto-fill-function) ;; Register allout-auto-fill to be used if ;; filling is active: (list 'allout-outside-normal-auto-fill-function normal-auto-fill-function) '(normal-auto-fill-function allout-auto-fill) ;; Paragraphs are broken by topic headlines. (list 'paragraph-start (concat paragraph-start "\\|^\\(" allout-regexp "\\)")) (list 'paragraph-separate (concat paragraph-separate "\\|^\\(" allout-regexp "\\)"))) (or (assq 'allout-mode minor-mode-alist) (setq minor-mode-alist (cons '(allout-mode " Allout") minor-mode-alist))) (allout-setup-menubar) (if allout-layout (setq do-layout t)) (setq allout-mode t) (run-hooks 'allout-mode-hook)) ;; Reactivation: ((setq do-layout t) (allout-infer-body-reindent)) ) ;; end of activation-mode cases. ;; Do auto layout if warranted: (let ((use-layout (if (listp allout-layout) allout-layout allout-default-layout))) (if (and do-layout allout-auto-activation use-layout (and (not (eq allout-auto-activation 'activate)) (if (eq allout-auto-activation 'ask) (if (y-or-n-p (format "Expose %s with layout '%s'? " (buffer-name) use-layout)) t (message "Skipped %s layout." (buffer-name)) nil) t))) (save-excursion (message "Adjusting '%s' exposure..." (buffer-name)) (goto-char 0) (allout-this-or-next-heading) (condition-case err (progn (apply 'allout-expose-topic (list use-layout)) (message "Adjusting '%s' exposure... done." (buffer-name))) ;; Problem applying exposure - notify user, but don't ;; interrupt, eg, file visit: (error (message "%s" (car (cdr err))) (sit-for 1)))))) allout-mode ) ; let* ) ; defun (defun allout-setup-mode-map () "Establish allout-mode bindings." (setq-default allout-mode-map (produce-allout-mode-map allout-keybindings-list)) (setq allout-mode-map (produce-allout-mode-map allout-keybindings-list)) (substitute-key-definition 'beginning-of-line 'allout-beginning-of-line allout-mode-map global-map) (substitute-key-definition 'move-beginning-of-line 'allout-beginning-of-line allout-mode-map global-map) (substitute-key-definition 'end-of-line 'allout-end-of-line allout-mode-map global-map) (substitute-key-definition 'move-end-of-line 'allout-end-of-line allout-mode-map global-map) (fset 'allout-mode-map allout-mode-map)) ;; ensure that allout-mode-map has some setting even if allout-mode hasn't ;; been invoked: (allout-setup-mode-map) ;;;_ > allout-minor-mode (defalias 'allout-minor-mode 'allout-mode) ;;;_ - Position Assessment ;;;_ > allout-hidden-p (&optional pos) (defsubst allout-hidden-p (&optional pos) "Non-nil if the character after point is invisible." (eq (get-char-property (or pos (point)) 'invisible) 'allout)) ;;;_ > allout-overlay-insert-in-front-handler (ol after beg end ;;; &optional prelen) (defun allout-overlay-insert-in-front-handler (ol after beg end &optional prelen) "Shift the overlay so stuff inserted in front of it are excluded." (if after (move-overlay ol (1+ beg) (overlay-end ol)))) ;;;_ > allout-overlay-interior-modification-handler (ol after beg end ;;; &optional prelen) (defun allout-overlay-interior-modification-handler (ol after beg end &optional prelen) "Get confirmation before making arbitrary changes to invisible text. We expose the invisible text and ask for confirmation. Refusal or keyboard-quit abandons the changes, with keyboard-quit additionally reclosing the opened text. No confirmation is necessary when inhibit-read-only is set - eg, allout internal functions use this feature cohesively bunch changes." (when (and (not inhibit-read-only) (not after)) (let ((start (point)) (ol-start (overlay-start ol)) (ol-end (overlay-end ol)) first) (goto-char beg) (while (< (point) end) (when (allout-hidden-p) (allout-show-to-offshoot) (if (allout-hidden-p) (save-excursion (forward-char 1) (allout-show-to-offshoot))) (when (not first) (setq first (point)))) (goto-char (if (featurep 'xemacs) (next-property-change (1+ (point)) nil end) (next-char-property-change (1+ (point)) end)))) (when first (goto-char first) (condition-case nil (if (not (yes-or-no-p (substitute-command-keys (concat "Modify concealed text? (\"no\" just aborts," " \\[keyboard-quit] also reconceals) ")))) (progn (goto-char start) (error "Concealed-text change refused."))) (quit (allout-flag-region ol-start ol-end nil) (allout-flag-region ol-start ol-end t) (error "Concealed-text change abandoned, text reconcealed.")))) (goto-char start)))) ;;;_ > allout-before-change-handler (beg end) (defun allout-before-change-handler (beg end) "Protect against changes to invisible text. See allout-overlay-interior-modification-handler for details." (if (and (allout-mode-p) undo-in-progress (allout-hidden-p)) (allout-show-to-offshoot)) ;; allout-overlay-interior-modification-handler on an overlay handles ;; this in other emacs, via `allout-exposure-category's 'modification-hooks. (when (and (featurep 'xemacs) (allout-mode-p)) ;; process all of the pending overlays: (save-excursion (got-char beg) (let ((overlay (allout-get-invisibility-overlay))) (allout-overlay-interior-modification-handler overlay nil beg end nil))))) ;;;_ > allout-isearch-end-handler (&optional overlay) (defun allout-isearch-end-handler (&optional overlay) "Reconcile allout outline exposure on arriving in hidden text after isearch. Optional OVERLAY parameter is for when this function is used by `isearch-open-invisible' overlay property. It is otherwise unused, so this function can also be used as an `isearch-mode-end-hook'." (if (and (allout-mode-p) (allout-hidden-p)) (allout-show-to-offshoot))) ;;;_ #3 Internal Position State-Tracking - "allout-recent-*" funcs ;;; All the basic outline functions that directly do string matches to ;;; evaluate heading prefix location set the variables ;;; `allout-recent-prefix-beginning' and `allout-recent-prefix-end' ;;; when successful. Functions starting with `allout-recent-' all ;;; use this state, providing the means to avoid redundant searches ;;; for just-established data. This optimization can provide ;;; significant speed improvement, but it must be employed carefully. ;;;_ = allout-recent-prefix-beginning (defvar allout-recent-prefix-beginning 0 "Buffer point of the start of the last topic prefix encountered.") (make-variable-buffer-local 'allout-recent-prefix-beginning) ;;;_ = allout-recent-prefix-end (defvar allout-recent-prefix-end 0 "Buffer point of the end of the last topic prefix encountered.") (make-variable-buffer-local 'allout-recent-prefix-end) ;;;_ = allout-recent-depth (defvar allout-recent-depth 0 "Depth of the last topic prefix encountered.") (make-variable-buffer-local 'allout-recent-depth) ;;;_ = allout-recent-end-of-subtree (defvar allout-recent-end-of-subtree 0 "Buffer point last returned by `allout-end-of-current-subtree'.") (make-variable-buffer-local 'allout-recent-end-of-subtree) ;;;_ > allout-prefix-data () (defsubst allout-prefix-data () "Register allout-prefix state data. For reference by `allout-recent' funcs. Returns BEGINNING." (setq allout-recent-prefix-end (or (match-end 1) (match-end 2)) allout-recent-prefix-beginning (or (match-beginning 1) (match-beginning 2)) allout-recent-depth (max 1 (- allout-recent-prefix-end allout-recent-prefix-beginning allout-header-subtraction))) allout-recent-prefix-beginning) ;;;_ > nullify-allout-prefix-data () (defsubst nullify-allout-prefix-data () "Mark allout prefix data as being uninformative." (setq allout-recent-prefix-end (point) allout-recent-prefix-beginning (point) allout-recent-depth 0) allout-recent-prefix-beginning) ;;;_ > allout-recent-depth () (defsubst allout-recent-depth () "Return depth of last heading encountered by an outline maneuvering function. All outline functions which directly do string matches to assess headings set the variables `allout-recent-prefix-beginning' and `allout-recent-prefix-end' if successful. This function uses those settings to return the current depth." allout-recent-depth) ;;;_ > allout-recent-prefix () (defsubst allout-recent-prefix () "Like `allout-recent-depth', but returns text of last encountered prefix. All outline functions which directly do string matches to assess headings set the variables `allout-recent-prefix-beginning' and `allout-recent-prefix-end' if successful. This function uses those settings to return the current prefix." (buffer-substring-no-properties allout-recent-prefix-beginning allout-recent-prefix-end)) ;;;_ > allout-recent-bullet () (defmacro allout-recent-bullet () "Like allout-recent-prefix, but returns bullet of last encountered prefix. All outline functions which directly do string matches to assess headings set the variables `allout-recent-prefix-beginning' and `allout-recent-prefix-end' if successful. This function uses those settings to return the current depth of the most recently matched topic." '(buffer-substring-no-properties (1- allout-recent-prefix-end) allout-recent-prefix-end)) ;;;_ #4 Navigation ;;;_ - Position Assessment ;;;_ : Location Predicates ;;;_ > allout-do-doublecheck () (defsubst allout-do-doublecheck () "True if current item conditions qualify for checking on topic aberrance." (and ;; presume integrity of outline and yanked content during yank - necessary, ;; to allow for level disparity of yank location and yanked text: (not allout-inhibit-aberrance-doublecheck) ;; allout-doublecheck-at-and-shallower is ceiling for doublecheck: (<= allout-recent-depth allout-doublecheck-at-and-shallower))) ;;;_ > allout-aberrant-container-p () (defun allout-aberrant-container-p () "True if topic, or next sibling with children, contains them discontinuously. Discontinuous means an immediate offspring that is nested more than one level deeper than the topic. If topic has no offspring, then the next sibling with offspring will determine whether or not this one is determined to be aberrant. If true, then the allout-recent-* settings are calibrated on the offspring that qaulifies it as aberrant, ie with depth that exceeds the topic by more than one." ;; This is most clearly understood when considering standard-prefix-leader ;; low-level topics, which can all too easily match text not intended as ;; headers. For example, any line with a leading '.' or '*' and lacking a ;; following bullet qualifies without this protection. (A sequence of ;; them can occur naturally, eg a typical textual bullet list.) We ;; disqualify such low-level sequences when they are followed by a ;; discontinuously contained child, inferring that the sequences are not ;; actually connected with their prospective context. (let ((depth (allout-depth)) (start-point (point)) done aberrant) (save-excursion (while (and (not done) (re-search-forward allout-line-boundary-regexp nil 0)) (allout-prefix-data) (goto-char allout-recent-prefix-beginning) (cond ;; sibling - continue: ((eq allout-recent-depth depth)) ;; first offspring is excessive - aberrant: ((> allout-recent-depth (1+ depth)) (setq done t aberrant t)) ;; next non-sibling is lower-depth - not aberrant: (t (setq done t))))) (if aberrant aberrant (goto-char start-point) ;; recalibrate allout-recent-* (allout-depth) nil))) ;;;_ > allout-on-current-heading-p () (defun allout-on-current-heading-p () "Return non-nil if point is on current visible topics' header line. Actually, returns prefix beginning point." (save-excursion (allout-beginning-of-current-line) (and (looking-at allout-regexp) (allout-prefix-data) (or (not (allout-do-doublecheck)) (not (allout-aberrant-container-p)))))) ;;;_ > allout-on-heading-p () (defalias 'allout-on-heading-p 'allout-on-current-heading-p) ;;;_ > allout-e-o-prefix-p () (defun allout-e-o-prefix-p () "True if point is located where current topic prefix ends, heading begins." (and (save-excursion (let ((inhibit-field-text-motion t)) (beginning-of-line)) (looking-at allout-regexp)) (= (point)(save-excursion (allout-end-of-prefix)(point))))) ;;;_ : Location attributes ;;;_ > allout-depth () (defun allout-depth () "Return depth of topic most immediately containing point. Return zero if point is not within any topic. Like `allout-current-depth', but respects hidden as well as visible topics." (save-excursion (let ((start-point (point))) (if (and (allout-goto-prefix) (not (< start-point (point)))) allout-recent-depth (progn ;; Oops, no prefix, nullify it: (nullify-allout-prefix-data) ;; ... and return 0: 0))))) ;;;_ > allout-current-depth () (defun allout-current-depth () "Return depth of visible topic most immediately containing point. Return zero if point is not within any topic." (save-excursion (if (allout-back-to-current-heading) (max 1 (- allout-recent-prefix-end allout-recent-prefix-beginning allout-header-subtraction)) 0))) ;;;_ > allout-get-current-prefix () (defun allout-get-current-prefix () "Topic prefix of the current topic." (save-excursion (if (allout-goto-prefix) (allout-recent-prefix)))) ;;;_ > allout-get-bullet () (defun allout-get-bullet () "Return bullet of containing topic (visible or not)." (save-excursion (and (allout-goto-prefix) (allout-recent-bullet)))) ;;;_ > allout-current-bullet () (defun allout-current-bullet () "Return bullet of current (visible) topic heading, or none if none found." (condition-case nil (save-excursion (allout-back-to-current-heading) (buffer-substring-no-properties (- allout-recent-prefix-end 1) allout-recent-prefix-end)) ;; Quick and dirty provision, ostensibly for missing bullet: (args-out-of-range nil)) ) ;;;_ > allout-get-prefix-bullet (prefix) (defun allout-get-prefix-bullet (prefix) "Return the bullet of the header prefix string PREFIX." ;; Doesn't make sense if we're old-style prefixes, but this just ;; oughtn't be called then, so forget about it... (if (string-match allout-regexp prefix) (substring prefix (1- (match-end 2)) (match-end 2)))) ;;;_ > allout-sibling-index (&optional depth) (defun allout-sibling-index (&optional depth) "Item number of this prospective topic among its siblings. If optional arg DEPTH is greater than current depth, then we're opening a new level, and return 0. If less than this depth, ascend to that depth and count..." (save-excursion (cond ((and depth (<= depth 0) 0)) ((or (null depth) (= depth (allout-depth))) (let ((index 1)) (while (allout-previous-sibling allout-recent-depth nil) (setq index (1+ index))) index)) ((< depth allout-recent-depth) (allout-ascend-to-depth depth) (allout-sibling-index)) (0)))) ;;;_ > allout-topic-flat-index () (defun allout-topic-flat-index () "Return a list indicating point's numeric section.subsect.subsubsect... Outermost is first." (let* ((depth (allout-depth)) (next-index (allout-sibling-index depth)) (rev-sibls nil)) (while (> next-index 0) (setq rev-sibls (cons next-index rev-sibls)) (setq depth (1- depth)) (setq next-index (allout-sibling-index depth))) rev-sibls) ) ;;;_ - Navigation routines ;;;_ > allout-beginning-of-current-line () (defun allout-beginning-of-current-line () "Like beginning of line, but to visible text." ;; This combination of move-beginning-of-line and beginning-of-line is ;; deliberate, but the (beginning-of-line) may now be superfluous. (let ((inhibit-field-text-motion t)) (move-beginning-of-line 1) (beginning-of-line) (while (and (not (bobp)) (or (not (bolp)) (allout-hidden-p))) (beginning-of-line) (if (or (allout-hidden-p) (not (bolp))) (forward-char -1))))) ;;;_ > allout-end-of-current-line () (defun allout-end-of-current-line () "Move to the end of line, past concealed text if any." ;; XXX This is for symmetry with `allout-beginning-of-current-line' - ;; `move-end-of-line' doesn't suffer the same problem as ;; `move-beginning-of-line'. (let ((inhibit-field-text-motion t)) (end-of-line) (while (allout-hidden-p) (end-of-line) (if (allout-hidden-p) (forward-char 1))))) ;;;_ > allout-beginning-of-line () (defun allout-beginning-of-line () "Beginning-of-line with `allout-beginning-of-line-cycles' behavior, if set." (interactive) (if (or (not allout-beginning-of-line-cycles) (not (equal last-command this-command))) (move-beginning-of-line 1) (allout-depth) (let ((beginning-of-body (save-excursion (while (and (allout-do-doublecheck) (allout-aberrant-container-p) (allout-previous-visible-heading 1))) (allout-beginning-of-current-entry) (point)))) (cond ((= (current-column) 0) (goto-char beginning-of-body)) ((< (point) beginning-of-body) (allout-beginning-of-current-line)) ((= (point) beginning-of-body) (goto-char (allout-current-bullet-pos))) (t (allout-beginning-of-current-line) (if (< (point) beginning-of-body) ;; we were on the headline after its start: (goto-char beginning-of-body))))))) ;;;_ > allout-end-of-line () (defun allout-end-of-line () "End-of-line with `allout-end-of-line-cycles' behavior, if set." (interactive) (if (or (not allout-end-of-line-cycles) (not (equal last-command this-command))) (allout-end-of-current-line) (let ((end-of-entry (save-excursion (allout-end-of-entry) (point)))) (cond ((not (eolp)) (allout-end-of-current-line)) ((or (allout-hidden-p) (save-excursion (forward-char -1) (allout-hidden-p))) (allout-back-to-current-heading) (allout-show-current-entry) (allout-show-children) (allout-end-of-entry)) ((>= (point) end-of-entry) (allout-back-to-current-heading) (allout-end-of-current-line)) (t (allout-end-of-entry)))))) ;;;_ > allout-next-heading () (defsubst allout-next-heading () "Move to the heading for the topic (possibly invisible) after this one. Returns the location of the heading, or nil if none found. We skip anomolous low-level topics, a la `allout-aberrant-container-p'." (if (looking-at allout-regexp) (forward-char 1)) (when (re-search-forward allout-line-boundary-regexp nil 0) (allout-prefix-data) (and (allout-do-doublecheck) ;; this will set allout-recent-* on the first non-aberrant topic, ;; whether it's the current one or one that disqualifies it: (allout-aberrant-container-p)) (goto-char allout-recent-prefix-beginning))) ;;;_ > allout-this-or-next-heading (defun allout-this-or-next-heading () "Position cursor on current or next heading." ;; A throwaway non-macro that is defined after allout-next-heading ;; and usable by allout-mode. (if (not (allout-goto-prefix-doublechecked)) (allout-next-heading))) ;;;_ > allout-previous-heading () (defun allout-previous-heading () "Move to the prior (possibly invisible) heading line. Return the location of the beginning of the heading, or nil if not found. We skip anomolous low-level topics, a la `allout-aberrant-container-p'." (if (bobp) nil (let ((start-point (point))) ;; allout-goto-prefix-doublechecked calls us, so we can't use it here. (allout-goto-prefix) (when (or (re-search-backward allout-line-boundary-regexp nil 0) (looking-at allout-bob-regexp)) (goto-char (allout-prefix-data)) (if (and (allout-do-doublecheck) (allout-aberrant-container-p)) (or (allout-previous-heading) (and (goto-char start-point) ;; recalibrate allout-recent-*: (allout-depth) nil)) (point)))))) ;;;_ > allout-get-invisibility-overlay () (defun allout-get-invisibility-overlay () "Return the overlay at point that dictates allout invisibility." (let ((overlays (overlays-at (point))) got) (while (and overlays (not got)) (if (equal (overlay-get (car overlays) 'invisible) 'allout) (setq got (car overlays)) (pop overlays))) got)) ;;;_ > allout-back-to-visible-text () (defun allout-back-to-visible-text () "Move to most recent prior character that is visible, and return point." (if (allout-hidden-p) (goto-char (overlay-start (allout-get-invisibility-overlay)))) (point)) ;;;_ - Subtree Charting ;;;_ " These routines either produce or assess charts, which are ;;; nested lists of the locations of topics within a subtree. ;;; ;;; Charts enable efficient subtree navigation by providing a reusable basis ;;; for elaborate, compound assessment and adjustment of a subtree. ;;;_ > allout-chart-subtree (&optional levels visible orig-depth prev-depth) (defun allout-chart-subtree (&optional levels visible orig-depth prev-depth) "Produce a location \"chart\" of subtopics of the containing topic. Optional argument LEVELS specifies a depth limit (relative to start depth) for the chart. Null LEVELS means no limit. When optional argument VISIBLE is non-nil, the chart includes only the visible subelements of the charted subjects. The remaining optional args are for internal use by the function. Point is left at the end of the subtree. Charts are used to capture outline structure, so that outline-altering routines need assess the structure only once, and then use the chart for their elaborate manipulations. The chart entries for the topics are in reverse order, so the last topic is listed first. The entry for each topic consists of an integer indicating the point at the beginning of the topic prefix. Charts for offspring consists of a list containing, recursively, the charts for the respective subtopics. The chart for a topics' offspring precedes the entry for the topic itself. The other function parameters are for internal recursion, and should not be specified by external callers. ORIG-DEPTH is depth of topic at starting point, and PREV-DEPTH is depth of prior topic." (let ((original (not orig-depth)) ; `orig-depth' set only in recursion. chart curr-depth) (if original ; Just starting? ; Register initial settings and ; position to first offspring: (progn (setq orig-depth (allout-depth)) (or prev-depth (setq prev-depth (1+ orig-depth))) (if visible (allout-next-visible-heading 1) (allout-next-heading)))) ;; Loop over the current levels' siblings. Besides being more ;; efficient than tail-recursing over a level, it avoids exceeding ;; the typically quite constrained Emacs max-lisp-eval-depth. ;; ;; Probably would speed things up to implement loop-based stack ;; operation rather than recursing for lower levels. Bah. (while (and (not (eobp)) ; Still within original topic? (< orig-depth (setq curr-depth allout-recent-depth)) (cond ((= prev-depth curr-depth) ;; Register this one and move on: (setq chart (cons allout-recent-prefix-beginning chart)) (if (and levels (<= levels 1)) ;; At depth limit - skip sublevels: (or (allout-next-sibling curr-depth) ;; or no more siblings - proceed to ;; next heading at lesser depth: (while (and (<= curr-depth allout-recent-depth) (if visible (allout-next-visible-heading 1) (allout-next-heading))))) (if visible (allout-next-visible-heading 1) (allout-next-heading)))) ((and (< prev-depth curr-depth) (or (not levels) (> levels 0))) ;; Recurse on deeper level of curr topic: (setq chart (cons (allout-chart-subtree (and levels (1- levels)) visible orig-depth curr-depth) chart)) ;; ... then continue with this one. ) ;; ... else nil if we've ascended back to prev-depth. ))) (if original ; We're at the last sibling on ; the original level. Position ; to the end of it: (progn (and (not (eobp)) (forward-char -1)) (and (= (preceding-char) ?\n) (= (aref (buffer-substring (max 1 (- (point) 3)) (point)) 1) ?\n) (forward-char -1)) (setq allout-recent-end-of-subtree (point)))) chart ; (nreverse chart) not necessary, ; and maybe not preferable. )) ;;;_ > allout-chart-siblings (&optional start end) (defun allout-chart-siblings (&optional start end) "Produce a list of locations of this and succeeding sibling topics. Effectively a top-level chart of siblings. See `allout-chart-subtree' for an explanation of charts." (save-excursion (when (allout-goto-prefix-doublechecked) (let ((chart (list (point)))) (while (allout-next-sibling) (setq chart (cons (point) chart))) (if chart (setq chart (nreverse chart))))))) ;;;_ > allout-chart-to-reveal (chart depth) (defun allout-chart-to-reveal (chart depth) "Return a flat list of hidden points in subtree CHART, up to DEPTH. If DEPTH is nil, include hidden points at any depth. Note that point can be left at any of the points on chart, or at the start point." (let (result here) (while (and (or (null depth) (> depth 0)) chart) (setq here (car chart)) (if (listp here) (let ((further (allout-chart-to-reveal here (if (null depth) depth (1- depth))))) ;; We're on the start of a subtree - recurse with it, if there's ;; more depth to go: (if further (setq result (append further result))) (setq chart (cdr chart))) (goto-char here) (if (allout-hidden-p) (setq result (cons here result))) (setq chart (cdr chart)))) result)) ;;;_ X allout-chart-spec (chart spec &optional exposing) ;; (defun allout-chart-spec (chart spec &optional exposing) ;; "Not yet (if ever) implemented. ;; Produce exposure directives given topic/subtree CHART and an exposure SPEC. ;; Exposure spec indicates the locations to be exposed and the prescribed ;; exposure status. Optional arg EXPOSING is an integer, with 0 ;; indicating pending concealment, anything higher indicating depth to ;; which subtopic headers should be exposed, and negative numbers ;; indicating (negative of) the depth to which subtopic headers and ;; bodies should be exposed. ;; The produced list can have two types of entries. Bare numbers ;; indicate points in the buffer where topic headers that should be ;; exposed reside. ;; - bare negative numbers indicates that the topic starting at the ;; point which is the negative of the number should be opened, ;; including their entries. ;; - bare positive values indicate that this topic header should be ;; opened. ;; - Lists signify the beginning and end points of regions that should ;; be flagged, and the flag to employ. (For concealment: `(\?r)', and ;; exposure:" ;; (while spec ;; (cond ((listp spec) ;; ) ;; ) ;; (setq spec (cdr spec))) ;; ) ;;;_ - Within Topic ;;;_ > allout-goto-prefix () (defun allout-goto-prefix () "Put point at beginning of immediately containing outline topic. Goes to most immediate subsequent topic if none immediately containing. Not sensitive to topic visibility. Returns the point at the beginning of the prefix, or nil if none." (let (done) (while (and (not done) (search-backward "\n" nil 1)) (forward-char 1) (if (looking-at allout-regexp) (setq done (allout-prefix-data)) (forward-char -1))) (if (bobp) (cond ((looking-at allout-regexp) (allout-prefix-data)) ((allout-next-heading)) (done)) done))) ;;;_ > allout-goto-prefix-doublechecked () (defun allout-goto-prefix-doublechecked () "Put point at beginning of immediately containing outline topic. Like `allout-goto-prefix', but shallow topics (according to `allout-doublecheck-at-and-shallower') are checked and disqualified for child containment discontinuity, according to `allout-aberrant-container-p'." (if (allout-goto-prefix) (if (and (allout-do-doublecheck) (allout-aberrant-container-p)) (allout-previous-heading) (point)))) ;;;_ > allout-end-of-prefix () (defun allout-end-of-prefix (&optional ignore-decorations) "Position cursor at beginning of header text. If optional IGNORE-DECORATIONS is non-nil, put just after bullet, otherwise skip white space between bullet and ensuing text." (if (not (allout-goto-prefix-doublechecked)) nil (goto-char allout-recent-prefix-end) (if ignore-decorations t (while (looking-at "[0-9]") (forward-char 1)) (if (and (not (eolp)) (looking-at "\\s-")) (forward-char 1))) ;; Reestablish where we are: (allout-current-depth))) ;;;_ > allout-current-bullet-pos () (defun allout-current-bullet-pos () "Return position of current (visible) topic's bullet." (if (not (allout-current-depth)) nil (1- allout-recent-prefix-end))) ;;;_ > allout-back-to-current-heading () (defun allout-back-to-current-heading () "Move to heading line of current topic, or beginning if not in a topic. If interactive, we position at the end of the prefix. Return value of resulting point, unless we started outside of (before any) topics, in which case we return nil." (allout-beginning-of-current-line) (let ((bol-point (point))) (if (allout-goto-prefix-doublechecked) (if (<= (point) bol-point) (if (interactive-p) (allout-end-of-prefix) (point)) (goto-char (point-min)) nil)))) ;;;_ > allout-back-to-heading () (defalias 'allout-back-to-heading 'allout-back-to-current-heading) ;;;_ > allout-pre-next-prefix () (defun allout-pre-next-prefix () "Skip forward to just before the next heading line. Returns that character position." (if (allout-next-heading) (goto-char (1- allout-recent-prefix-beginning)))) ;;;_ > allout-end-of-subtree (&optional current include-trailing-blank) (defun allout-end-of-subtree (&optional current include-trailing-blank) "Put point at the end of the last leaf in the containing topic. Optional CURRENT means put point at the end of the containing visible topic. Optional INCLUDE-TRAILING-BLANK means include a trailing blank line, if any, as part of the subtree. Otherwise, that trailing blank will be excluded as delimiting whitespace between topics. Returns the value of point." (interactive "P") (if current (allout-back-to-current-heading) (allout-goto-prefix-doublechecked)) (let ((level allout-recent-depth)) (allout-next-heading) (while (and (not (eobp)) (> allout-recent-depth level)) (allout-next-heading)) (if (eobp) (allout-end-of-entry) (forward-char -1)) (if (and (not include-trailing-blank) (= ?\n (preceding-char))) (forward-char -1)) (setq allout-recent-end-of-subtree (point)))) ;;;_ > allout-end-of-current-subtree (&optional include-trailing-blank) (defun allout-end-of-current-subtree (&optional include-trailing-blank) "Put point at end of last leaf in currently visible containing topic. Optional INCLUDE-TRAILING-BLANK means include a trailing blank line, if any, as part of the subtree. Otherwise, that trailing blank will be excluded as delimiting whitespace between topics. Returns the value of point." (interactive) (allout-end-of-subtree t include-trailing-blank)) ;;;_ > allout-beginning-of-current-entry () (defun allout-beginning-of-current-entry () "When not already there, position point at beginning of current topic header. If already there, move cursor to bullet for hot-spot operation. \(See `allout-mode' doc string for details of hot-spot operation.)" (interactive) (let ((start-point (point))) (move-beginning-of-line 1) (if (< 0 (allout-current-depth)) (goto-char allout-recent-prefix-end) (goto-char (point-min))) (allout-end-of-prefix) (if (and (interactive-p) (= (point) start-point)) (goto-char (allout-current-bullet-pos))))) ;;;_ > allout-end-of-entry (&optional inclusive) (defun allout-end-of-entry (&optional inclusive) "Position the point at the end of the current topics' entry. Optional INCLUSIVE means also include trailing empty line, if any. When unset, whitespace between items separates them even when the items are collapsed." (interactive) (allout-pre-next-prefix) (if (and (not inclusive) (not (bobp)) (= ?\n (preceding-char))) (forward-char -1)) (point)) ;;;_ > allout-end-of-current-heading () (defun allout-end-of-current-heading () (interactive) (allout-beginning-of-current-entry) (search-forward "\n" nil t) (forward-char -1)) (defalias 'allout-end-of-heading 'allout-end-of-current-heading) ;;;_ > allout-get-body-text () (defun allout-get-body-text () "Return the unmangled body text of the topic immediately containing point." (save-excursion (allout-end-of-prefix) (if (not (search-forward "\n" nil t)) nil (backward-char 1) (let ((pre-body (point))) (if (not pre-body) nil (allout-end-of-entry t) (if (not (= pre-body (point))) (buffer-substring-no-properties (1+ pre-body) (point)))) ) ) ) ) ;;;_ - Depth-wise ;;;_ > allout-ascend-to-depth (depth) (defun allout-ascend-to-depth (depth) "Ascend to depth DEPTH, returning depth if successful, nil if not." (if (and (> depth 0)(<= depth (allout-depth))) (let (last-ascended) (while (and (< depth allout-recent-depth) (setq last-ascended (allout-ascend)))) (goto-char allout-recent-prefix-beginning) (if (interactive-p) (allout-end-of-prefix)) (and last-ascended allout-recent-depth)))) ;;;_ > allout-ascend () (defun allout-ascend (&optional dont-move-if-unsuccessful) "Ascend one level, returning resulting depth if successful, nil if not. Point is left at the beginning of the level whether or not successful, unless optional DONT-MOVE-IF-UNSUCCESSFUL is set, in which case point is returned to its original starting location." (if dont-move-if-unsuccessful (setq dont-move-if-unsuccessful (point))) (prog1 (if (allout-beginning-of-level) (let ((bolevel (point)) (bolevel-depth allout-recent-depth)) (allout-previous-heading) (cond ((< allout-recent-depth bolevel-depth) allout-recent-depth) ((= allout-recent-depth bolevel-depth) (if dont-move-if-unsuccessful (goto-char dont-move-if-unsuccessful)) (allout-depth) nil) (t ;; some topic after very first is lower depth than first: (goto-char bolevel) (allout-depth) nil)))) (if (interactive-p) (allout-end-of-prefix)))) ;;;_ > allout-descend-to-depth (depth) (defun allout-descend-to-depth (depth) "Descend to depth DEPTH within current topic. Returning depth if successful, nil if not." (let ((start-point (point)) (start-depth (allout-depth))) (while (and (> (allout-depth) 0) (not (= depth allout-recent-depth)) ; ... not there yet (allout-next-heading) ; ... go further (< start-depth allout-recent-depth))) ; ... still in topic (if (and (> (allout-depth) 0) (= allout-recent-depth depth)) depth (goto-char start-point) nil)) ) ;;;_ > allout-up-current-level (arg) (defun allout-up-current-level (arg) "Move out ARG levels from current visible topic." (interactive "p") (let ((start-point (point))) (allout-back-to-current-heading) (if (not (allout-ascend)) (progn (goto-char start-point) (error "Can't ascend past outermost level")) (if (interactive-p) (allout-end-of-prefix)) allout-recent-prefix-beginning))) ;;;_ - Linear ;;;_ > allout-next-sibling (&optional depth backward) (defun allout-next-sibling (&optional depth backward) "Like `allout-forward-current-level', but respects invisible topics. Traverse at optional DEPTH, or current depth if none specified. Go backward if optional arg BACKWARD is non-nil. Return the start point of the new topic if successful, nil otherwise." (if (if backward (bobp) (eobp)) nil (let ((target-depth (or depth (allout-depth))) (start-point (point)) (start-prefix-beginning allout-recent-prefix-beginning) (count 0) leaping last-depth) (while (and ;; done too few single steps to resort to the leap routine: (not leaping) ;; not at limit: (not (if backward (bobp) (eobp))) ;; still traversable: (if backward (allout-previous-heading) (allout-next-heading)) ;; we're below the target depth (> (setq last-depth allout-recent-depth) target-depth)) (setq count (1+ count)) (if (> count 7) ; lists are commonly 7 +- 2, right?-) (setq leaping t))) (cond (leaping (or (allout-next-sibling-leap target-depth backward) (progn (goto-char start-point) (if depth (allout-depth) target-depth) nil))) ((and (not (eobp)) (and (> (or last-depth (allout-depth)) 0) (= allout-recent-depth target-depth)) (not (= start-prefix-beginning allout-recent-prefix-beginning))) allout-recent-prefix-beginning) (t (goto-char start-point) (if depth (allout-depth) target-depth) nil))))) ;;;_ > allout-next-sibling-leap (&optional depth backward) (defun allout-next-sibling-leap (&optional depth backward) "Like `allout-next-sibling', but by direct search for topic at depth. Traverse at optional DEPTH, or current depth if none specified. Go backward if optional arg BACKWARD is non-nil. Return the start point of the new topic if successful, nil otherwise. Costs more than regular `allout-next-sibling' for short traversals: - we have to check the prior (next, if travelling backwards) item to confirm connectivity with the prior topic, and - if confirmed, we have to reestablish the allout-recent-* settings with some extra navigation - if confirmation fails, we have to do more work to recover It is an increasingly big win when there are many intervening offspring before the next sibling, however, so `allout-next-sibling' resorts to this if it finds itself in that situation." (if (if backward (bobp) (eobp)) nil (let* ((start-point (point)) (target-depth (or depth (allout-depth))) (search-whitespace-regexp nil) (depth-biased (- target-depth 2)) (expression (if (<= target-depth 1) allout-depth-one-regexp (format allout-depth-specific-regexp depth-biased depth-biased))) found done) (while (not done) (setq found (if backward (re-search-backward expression nil 'to-limit) (forward-char 1) (re-search-forward expression nil 'to-limit))) (if (and found (allout-aberrant-container-p)) (setq found nil)) (setq done (or found (if backward (bobp) (eobp))))) (if (not found) (progn (goto-char start-point) nil) ;; rationale: if any intervening items were at a lower depth, we ;; would now be on the first offspring at the target depth - ie, ;; the preceeding item (per the search direction) must be at a ;; lesser depth. that's all we need to check. (if backward (allout-next-heading) (allout-previous-heading)) (if (< allout-recent-depth target-depth) ;; return to start and reestablish allout-recent-*: (progn (goto-char start-point) (allout-depth) nil) (goto-char found) ;; locate cursor and set allout-recent-*: (allout-goto-prefix)))))) ;;;_ > allout-previous-sibling (&optional depth backward) (defun allout-previous-sibling (&optional depth backward) "Like `allout-forward-current-level' backwards, respecting invisible topics. Optional DEPTH specifies depth to traverse, default current depth. Optional BACKWARD reverses direction. Return depth if successful, nil otherwise." (allout-next-sibling depth (not backward)) ) ;;;_ > allout-snug-back () (defun allout-snug-back () "Position cursor at end of previous topic. Presumes point is at the start of a topic prefix." (if (or (bobp) (eobp)) nil (forward-char -1)) (if (or (bobp) (not (= ?\n (preceding-char)))) nil (forward-char -1)) (point)) ;;;_ > allout-beginning-of-level () (defun allout-beginning-of-level () "Go back to the first sibling at this level, visible or not." (allout-end-of-level 'backward)) ;;;_ > allout-end-of-level (&optional backward) (defun allout-end-of-level (&optional backward) "Go to the last sibling at this level, visible or not." (let ((depth (allout-depth))) (while (allout-previous-sibling depth nil)) (prog1 allout-recent-depth (if (interactive-p) (allout-end-of-prefix))))) ;;;_ > allout-next-visible-heading (arg) (defun allout-next-visible-heading (arg) "Move to the next ARG'th visible heading line, backward if arg is negative. Move to buffer limit in indicated direction if headings are exhausted." (interactive "p") (let* ((inhibit-field-text-motion t) (backward (if (< arg 0) (setq arg (* -1 arg)))) (step (if backward -1 1)) prev got) (while (> arg 0) (while (and ;; Boundary condition: (not (if backward (bobp)(eobp))) ;; Move, skipping over all concealed lines in one fell swoop: (prog1 (condition-case nil (or (line-move step) t) (error nil)) (allout-beginning-of-current-line)) ;; Deal with apparent header line: (if (not (looking-at allout-regexp)) ;; not a header line, keep looking: t (allout-prefix-data) (if (and (allout-do-doublecheck) (allout-aberrant-container-p)) ;; skip this aberrant prospective header line: t ;; this prospective headerline qualifies - register: (setq got allout-recent-prefix-beginning) ;; and break the loop: nil)))) ;; Register this got, it may be the last: (if got (setq prev got)) (setq arg (1- arg))) (cond (got ; Last move was to a prefix: (allout-end-of-prefix)) (prev ; Last move wasn't, but prev was: (goto-char prev) (allout-end-of-prefix)) ((not backward) (end-of-line) nil)))) ;;;_ > allout-previous-visible-heading (arg) (defun allout-previous-visible-heading (arg) "Move to the previous heading line. With argument, repeats or can move forward if negative. A heading line is one that starts with a `*' (or that `allout-regexp' matches)." (interactive "p") (prog1 (allout-next-visible-heading (- arg)) (if (interactive-p) (allout-end-of-prefix)))) ;;;_ > allout-forward-current-level (arg) (defun allout-forward-current-level (arg) "Position point at the next heading of the same level. Takes optional repeat-count, goes backward if count is negative. Returns resulting position, else nil if none found." (interactive "p") (let ((start-depth (allout-current-depth)) (start-arg arg) (backward (> 0 arg))) (if (= 0 start-depth) (error "No siblings, not in a topic...")) (if backward (setq arg (* -1 arg))) (allout-back-to-current-heading) (while (and (not (zerop arg)) (if backward (allout-previous-sibling) (allout-next-sibling))) (setq arg (1- arg))) (if (not (interactive-p)) nil (allout-end-of-prefix) (if (not (zerop arg)) (error "Hit %s level %d topic, traversed %d of %d requested" (if backward "first" "last") allout-recent-depth (- (abs start-arg) arg) (abs start-arg)))))) ;;;_ > allout-backward-current-level (arg) (defun allout-backward-current-level (arg) "Inverse of `allout-forward-current-level'." (interactive "p") (if (interactive-p) (let ((current-prefix-arg (* -1 arg))) (call-interactively 'allout-forward-current-level)) (allout-forward-current-level (* -1 arg)))) ;;;_ #5 Alteration ;;;_ - Fundamental ;;;_ = allout-post-goto-bullet (defvar allout-post-goto-bullet nil "Outline internal var, for `allout-pre-command-business' hot-spot operation. When set, tells post-processing to reposition on topic bullet, and then unset it. Set by `allout-pre-command-business' when implementing hot-spot operation, where literal characters typed over a topic bullet are mapped to the command of the corresponding control-key on the `allout-mode-map'.") (make-variable-buffer-local 'allout-post-goto-bullet) ;;;_ = allout-command-counter (defvar allout-command-counter 0 "Counter that monotonically increases in allout-mode buffers. Set by `allout-pre-command-business', to support allout addons in coordinating with allout activity.") (make-variable-buffer-local 'allout-command-counter) ;;;_ > allout-post-command-business () (defun allout-post-command-business () "Outline `post-command-hook' function. - Implement (and clear) `allout-post-goto-bullet', for hot-spot outline commands. - Decrypt topic currently being edited if it was encrypted for a save." ; Apply any external change func: (if (not (allout-mode-p)) ; In allout-mode. nil (if (and (boundp 'allout-after-save-decrypt) allout-after-save-decrypt) (allout-after-saves-handler)) ;; Implement allout-post-goto-bullet, if set: (if (and allout-post-goto-bullet (allout-current-bullet-pos)) (progn (goto-char (allout-current-bullet-pos)) (setq allout-post-goto-bullet nil))) )) ;;;_ > allout-pre-command-business () (defun allout-pre-command-business () "Outline `pre-command-hook' function for outline buffers. Among other things, implements special behavior when the cursor is on the topic bullet character. When the cursor is on the bullet character, self-insert characters are reinterpreted as the corresponding control-character in the `allout-mode-map'. The `allout-mode' `post-command-hook' insures that the cursor which has moved as a result of such reinterpretation is positioned on the bullet character of the destination topic. The upshot is that you can get easy, single (ie, unmodified) key outline maneuvering operations by positioning the cursor on the bullet char. When in this mode you can use regular cursor-positioning command/keystrokes to relocate the cursor off of a bullet character to return to regular interpretation of self-insert characters." (if (not (allout-mode-p)) nil ;; Increment allout-command-counter (setq allout-command-counter (1+ allout-command-counter)) ;; Do hot-spot navigation. (if (and (eq this-command 'self-insert-command) (eq (point)(allout-current-bullet-pos))) (allout-hotspot-key-handler)))) ;;;_ > allout-hotspot-key-handler () (defun allout-hotspot-key-handler () "Catchall handling of key bindings in hot-spots. Translates unmodified keystrokes to corresponding allout commands, when they would qualify if prefixed with the allout-command-prefix, and sets this-command accordingly. Returns the qualifying command, if any, else nil." (interactive) (let* ((key-string (if (numberp last-command-char) (char-to-string last-command-char))) (key-num (cond ((numberp last-command-char) last-command-char) ;; for XEmacs character type: ((and (fboundp 'characterp) (apply 'characterp (list last-command-char))) (apply 'char-to-int (list last-command-char))) (t 0))) mapped-binding) (if (zerop key-num) nil (if (and ;; exclude control chars and escape: (<= 33 key-num) (setq mapped-binding (or (and (assoc key-string allout-keybindings-list) ;; translate literal membership on list: (cadr (assoc key-string allout-keybindings-list))) ;; translate as a keybinding: (key-binding (concat allout-command-prefix (char-to-string (if (and (<= 97 key-num) ; "a" (>= 122 key-num)) ; "z" (- key-num 96) key-num))) t)))) ;; Qualified as an allout command - do hot-spot operation. (setq allout-post-goto-bullet t) ;; accept-defaults nil, or else we'll get allout-item-icon-key-handler. (setq mapped-binding (key-binding (char-to-string key-num)))) (while (keymapp mapped-binding) (setq mapped-binding (lookup-key mapped-binding (vector (read-char))))) (if mapped-binding (setq this-command mapped-binding))))) ;;;_ > allout-find-file-hook () (defun allout-find-file-hook () "Activate `allout-mode' on non-nil `allout-auto-activation', `allout-layout'. See `allout-init' for setup instructions." (if (and allout-auto-activation (not (allout-mode-p)) allout-layout) (allout-mode t))) ;;;_ - Topic Format Assessment ;;;_ > allout-solicit-alternate-bullet (depth &optional current-bullet) (defun allout-solicit-alternate-bullet (depth &optional current-bullet) "Prompt for and return a bullet char as an alternative to the current one. Offer one suitable for current depth DEPTH as default." (let* ((default-bullet (or (and (stringp current-bullet) current-bullet) (allout-bullet-for-depth depth))) (sans-escapes (regexp-sans-escapes allout-bullets-string)) choice) (save-excursion (goto-char (allout-current-bullet-pos)) (setq choice (solicit-char-in-string (format "Select bullet: %s ('%s' default): " sans-escapes (substring-no-properties default-bullet)) sans-escapes t))) (message "") (if (string= choice "") default-bullet choice)) ) ;;;_ > allout-distinctive-bullet (bullet) (defun allout-distinctive-bullet (bullet) "True if BULLET is one of those on `allout-distinctive-bullets-string'." (string-match (regexp-quote bullet) allout-distinctive-bullets-string)) ;;;_ > allout-numbered-type-prefix (&optional prefix) (defun allout-numbered-type-prefix (&optional prefix) "True if current header prefix bullet is numbered bullet." (and allout-numbered-bullet (string= allout-numbered-bullet (if prefix (allout-get-prefix-bullet prefix) (allout-get-bullet))))) ;;;_ > allout-encrypted-type-prefix (&optional prefix) (defun allout-encrypted-type-prefix (&optional prefix) "True if current header prefix bullet is for an encrypted entry (body)." (and allout-topic-encryption-bullet (string= allout-topic-encryption-bullet (if prefix (allout-get-prefix-bullet prefix) (allout-get-bullet))))) ;;;_ > allout-bullet-for-depth (&optional depth) (defun allout-bullet-for-depth (&optional depth) "Return outline topic bullet suited to optional DEPTH, or current depth." ;; Find bullet in plain-bullets-string modulo DEPTH. (if allout-stylish-prefixes (char-to-string (aref allout-plain-bullets-string (% (max 0 (- depth 2)) allout-plain-bullets-string-len))) allout-primary-bullet) ) ;;;_ - Topic Production ;;;_ > allout-make-topic-prefix (&optional prior-bullet (defun allout-make-topic-prefix (&optional prior-bullet new depth solicit number-control index) ;; Depth null means use current depth, non-null means we're either ;; opening a new topic after current topic, lower or higher, or we're ;; changing level of current topic. ;; Solicit dominates specified bullet-char. ;;;_ . Doc string: "Generate a topic prefix suitable for optional arg DEPTH, or current depth. All the arguments are optional. PRIOR-BULLET indicates the bullet of the prefix being changed, or nil if none. This bullet may be preserved (other options notwithstanding) if it is on the `allout-distinctive-bullets-string', for instance. Second arg NEW indicates that a new topic is being opened after the topic at point, if non-nil. Default bullet for new topics, eg, may be set (contingent to other args) to numbered bullets if previous sibling is one. The implication otherwise is that the current topic is being adjusted - shifted or rebulleted - and we don't consider bullet or previous sibling. Third arg DEPTH forces the topic prefix to that depth, regardless of the current topics' depth. If SOLICIT is non-nil, then the choice of bullet is solicited from user. If it's a character, then that character is offered as the default, otherwise the one suited to the context (according to distinction or depth) is offered. (This overrides other options, including, eg, a distinctive PRIOR-BULLET.) If non-nil, then the context-specific bullet is used. Fifth arg, NUMBER-CONTROL, matters only if `allout-numbered-bullet' is non-nil *and* soliciting was not explicitly invoked. Then NUMBER-CONTROL non-nil forces prefix to either numbered or denumbered format, depending on the value of the sixth arg, INDEX. \(Note that NUMBER-CONTROL does *not* apply to level 1 topics. Sorry...) If NUMBER-CONTROL is non-nil and sixth arg INDEX is non-nil then the prefix of the topic is forced to be numbered. Non-nil NUMBER-CONTROL and nil INDEX forces non-numbered format on the bullet. Non-nil NUMBER-CONTROL and non-nil, non-number INDEX means that the index for the numbered prefix will be derived, by counting siblings back to start of level. If INDEX is a number, then that number is used as the index for the numbered prefix (allowing, eg, sequential renumbering to not require this function counting back the index for each successive sibling)." ;;;_ . Code: ;; The options are ordered in likely frequence of use, most common ;; highest, least lowest. Ie, more likely to be doing prefix ;; adjustments than soliciting, and yet more than numbering. ;; Current prefix is least dominant, but most likely to be commonly ;; specified... (let* (body numbering denumbering (depth (or depth (allout-depth))) (header-lead allout-header-prefix) (bullet-char ;; Getting value for bullet char is practically the whole job: (cond ; Simplest situation - level 1: ((<= depth 1) (setq header-lead "") allout-primary-bullet) ; Simple, too: all asterisks: (allout-old-style-prefixes ;; Cheat - make body the whole thing, null out header-lead and ;; bullet-char: (setq body (make-string depth (string-to-char allout-primary-bullet))) (setq header-lead "") "") ;; (Neither level 1 nor old-style, so we're space padding. ;; Sneak it in the condition of the next case, whatever it is.) ;; Solicitation overrides numbering and other cases: ((progn (setq body (make-string (- depth 2) ?\ )) ;; The actual condition: solicit) (let* ((got (allout-solicit-alternate-bullet depth solicit))) ;; Gotta check whether we're numbering and got a numbered bullet: (setq numbering (and allout-numbered-bullet (not (and number-control (not index))) (string= got allout-numbered-bullet))) ;; Now return what we got, regardless: got)) ;; Numbering invoked through args: ((and allout-numbered-bullet number-control) (if (setq numbering (not (setq denumbering (not index)))) allout-numbered-bullet (if (and prior-bullet (not (string= allout-numbered-bullet prior-bullet))) prior-bullet (allout-bullet-for-depth depth)))) ;;; Neither soliciting nor controlled numbering ;;; ;;; (may be controlled denumbering, tho) ;;; ;; Check wrt previous sibling: ((and new ; only check for new prefixes (<= depth (allout-depth)) allout-numbered-bullet ; ... & numbering enabled (not denumbering) (let ((sibling-bullet (save-excursion ;; Locate correct sibling: (or (>= depth (allout-depth)) (allout-ascend-to-depth depth)) (allout-get-bullet)))) (if (and sibling-bullet (string= allout-numbered-bullet sibling-bullet)) (setq numbering sibling-bullet))))) ;; Distinctive prior bullet? ((and prior-bullet (allout-distinctive-bullet prior-bullet) ;; Either non-numbered: (or (not (and allout-numbered-bullet (string= prior-bullet allout-numbered-bullet))) ;; or numbered, and not denumbering: (setq numbering (not denumbering))) ;; Here 'tis: prior-bullet)) ;; Else, standard bullet per depth: ((allout-bullet-for-depth depth))))) (concat header-lead body bullet-char (if numbering (format "%d" (cond ((and index (numberp index)) index) (new (1+ (allout-sibling-index depth))) ((allout-sibling-index)))))) ) ) ;;;_ > allout-open-topic (relative-depth &optional before offer-recent-bullet) (defun allout-open-topic (relative-depth &optional before offer-recent-bullet) "Open a new topic at depth DEPTH. New topic is situated after current one, unless optional flag BEFORE is non-nil, or unless current line is completely empty - lacking even whitespace - in which case open is done on the current line. When adding an offspring, it will be added immediately after the parent if the other offspring are exposed, or after the last child if the offspring are hidden. (The intervening offspring will be exposed in the latter case.) If OFFER-RECENT-BULLET is true, offer to use the bullet of the prior sibling. Nuances: - Creation of new topics is with respect to the visible topic containing the cursor, regardless of intervening concealed ones. - New headers are generally created after/before the body of a topic. However, they are created right at cursor location if the cursor is on a blank line, even if that breaks the current topic body. This is intentional, to provide a simple means for deliberately dividing topic bodies. - Double spacing of topic lists is preserved. Also, the first level two topic is created double-spaced (and so would be subsequent siblings, if that's left intact). Otherwise, single-spacing is used. - Creation of sibling or nested topics is with respect to the topic you're starting from, even when creating backwards. This way you can easily create a sibling in front of the current topic without having to go to its preceding sibling, and then open forward from there." (allout-beginning-of-current-line) (let* ((inhibit-field-text-motion t) (depth (+ (allout-current-depth) relative-depth)) (opening-on-blank (if (looking-at "^\$") (not (setq before nil)))) ;; bunch o vars set while computing ref-topic opening-numbered ref-depth ref-bullet (ref-topic (save-excursion (cond ((< relative-depth 0) (allout-ascend-to-depth depth)) ((>= relative-depth 1) nil) (t (allout-back-to-current-heading))) (setq ref-depth allout-recent-depth) (setq ref-bullet (if (> allout-recent-prefix-end 1) (allout-recent-bullet) "")) (setq opening-numbered (save-excursion (and allout-numbered-bullet (or (<= relative-depth 0) (allout-descend-to-depth depth)) (if (allout-numbered-type-prefix) allout-numbered-bullet)))) (point))) dbl-space doing-beginning start end) (if (not opening-on-blank) ; Positioning and vertical ; padding - only if not ; opening-on-blank: (progn (goto-char ref-topic) (setq dbl-space ; Determine double space action: (or (and (<= relative-depth 0) ; not descending; (save-excursion ;; at b-o-b or preceded by a blank line? (or (> 0 (forward-line -1)) (looking-at "^\\s-*$") (bobp))) (save-excursion ;; succeeded by a blank line? (allout-end-of-current-subtree) (looking-at "\n\n"))) (and (= ref-depth 1) (or before (= depth 1) (save-excursion ;; Don't already have following ;; vertical padding: (not (allout-pre-next-prefix))))))) ;; Position to prior heading, if inserting backwards, and not ;; going outwards: (if (and before (>= relative-depth 0)) (progn (allout-back-to-current-heading) (setq doing-beginning (bobp)) (if (not (bobp)) (allout-previous-heading))) (if (and before (bobp)) (open-line 1))) (if (<= relative-depth 0) ;; Not going inwards, don't snug up: (if doing-beginning (if (not dbl-space) (open-line 1) (open-line 2)) (if before (progn (end-of-line) (allout-pre-next-prefix) (while (and (= ?\n (following-char)) (save-excursion (forward-char 1) (allout-hidden-p))) (forward-char 1)) (if (not (looking-at "^$")) (open-line 1))) (allout-end-of-current-subtree) (if (looking-at "\n\n") (forward-char 1)))) ;; Going inwards - double-space if first offspring is ;; double-spaced, otherwise snug up. (allout-end-of-entry) (if (eobp) (newline 1) (line-move 1)) (allout-beginning-of-current-line) (backward-char 1) (if (bolp) ;; Blank lines between current header body and next ;; header - get to last substantive (non-white-space) ;; line in body: (progn (setq dbl-space t) (re-search-backward "[^ \t\n]" nil t))) (if (looking-at "\n\n") (setq dbl-space t)) (if (save-excursion (allout-next-heading) (when (> allout-recent-depth ref-depth) ;; This is an offspring. (forward-line -1) (looking-at "^\\s-*$"))) (progn (forward-line 1) (open-line 1) (forward-line 1))) (allout-end-of-current-line)) ;;(if doing-beginning (goto-char doing-beginning)) (if (not (bobp)) ;; We insert a newline char rather than using open-line to ;; avoid rear-stickiness inheritence of read-only property. (progn (if (and (not (> depth ref-depth)) (not before)) (open-line 1) (if (and (not dbl-space) (> depth ref-depth)) (newline 1) (if dbl-space (open-line 1) (if (not before) (newline 1))))) (if (and dbl-space (not (> relative-depth 0))) (newline 1)) (if (and (not (eobp)) (or (not (bolp)) (and (not (bobp)) ;; bolp doesnt detect concealed ;; trailing newlines, compensate: (save-excursion (forward-char -1) (allout-hidden-p))))) (forward-char 1)))) )) (setq start (point)) (insert (concat (allout-make-topic-prefix opening-numbered t depth) " ")) (setq end (1+ (point))) (allout-rebullet-heading (and offer-recent-bullet ref-bullet) depth nil nil t) (if (> relative-depth 0) (save-excursion (goto-char ref-topic) (allout-show-children))) (end-of-line) (run-hook-with-args 'allout-structure-added-hook start end) ) ) ;;;_ > allout-open-subtopic (arg) (defun allout-open-subtopic (arg) "Open new topic header at deeper level than the current one. Negative universal arg means to open deeper, but place the new topic prior to the current one." (interactive "p") (allout-open-topic 1 (> 0 arg) (< 1 arg))) ;;;_ > allout-open-sibtopic (arg) (defun allout-open-sibtopic (arg) "Open new topic header at same level as the current one. Positive universal arg means to use the bullet of the prior sibling. Negative universal arg means to place the new topic prior to the current one." (interactive "p") (allout-open-topic 0 (> 0 arg) (not (= 1 arg)))) ;;;_ > allout-open-supertopic (arg) (defun allout-open-supertopic (arg) "Open new topic header at shallower level than the current one. Negative universal arg means to open shallower, but place the new topic prior to the current one." (interactive "p") (allout-open-topic -1 (> 0 arg) (< 1 arg))) ;;;_ - Outline Alteration ;;;_ : Topic Modification ;;;_ = allout-former-auto-filler (defvar allout-former-auto-filler nil "Name of modal fill function being wrapped by `allout-auto-fill'.") ;;;_ > allout-auto-fill () (defun allout-auto-fill () "`allout-mode' autofill function. Maintains outline hanging topic indentation if `allout-use-hanging-indents' is set." (when (not allout-inhibit-auto-fill) (let ((fill-prefix (if allout-use-hanging-indents ;; Check for topic header indentation: (save-excursion (beginning-of-line) (if (looking-at allout-regexp) ;; ... construct indentation to account for ;; length of topic prefix: (make-string (progn (allout-end-of-prefix) (current-column)) ?\ ))))) (use-auto-fill-function (or allout-outside-normal-auto-fill-function auto-fill-function 'do-auto-fill))) (if (or allout-former-auto-filler allout-use-hanging-indents) (funcall use-auto-fill-function))))) ;;;_ > allout-reindent-body (old-depth new-depth &optional number) (defun allout-reindent-body (old-depth new-depth &optional number) "Reindent body lines which were indented at OLD-DEPTH to NEW-DEPTH. Optional arg NUMBER indicates numbering is being added, and it must be accommodated. Note that refill of indented paragraphs is not done." (save-excursion (allout-end-of-prefix) (let* ((new-margin (current-column)) excess old-indent-begin old-indent-end ;; We want the column where the header-prefix text started ;; *before* the prefix was changed, so we infer it relative ;; to the new margin and the shift in depth: (old-margin (+ old-depth (- new-margin new-depth)))) ;; Process lines up to (but excluding) next topic header: (allout-unprotected (save-match-data (while (and (re-search-forward "\n\\(\\s-*\\)" nil t) ;; Register the indent data, before we reset the ;; match data with a subsequent `looking-at': (setq old-indent-begin (match-beginning 1) old-indent-end (match-end 1)) (not (looking-at allout-regexp))) (if (> 0 (setq excess (- (- old-indent-end old-indent-begin) old-margin))) ;; Text starts left of old margin - don't adjust: nil ;; Text was hanging at or right of old left margin - ;; reindent it, preserving its existing indentation ;; beyond the old margin: (delete-region old-indent-begin old-indent-end) (indent-to (+ new-margin excess (current-column)))))))))) ;;;_ > allout-rebullet-current-heading (arg) (defun allout-rebullet-current-heading (arg) "Solicit new bullet for current visible heading." (interactive "p") (let ((initial-col (current-column)) (on-bullet (eq (point)(allout-current-bullet-pos))) from to (backwards (if (< arg 0) (setq arg (* arg -1))))) (while (> arg 0) (save-excursion (allout-back-to-current-heading) (allout-end-of-prefix) (setq from allout-recent-prefix-beginning to allout-recent-prefix-end) (allout-rebullet-heading t ;;; solicit nil ;;; depth nil ;;; number-control nil ;;; index t) ;;; do-successors (run-hook-with-args 'allout-exposure-change-hook from to t)) (setq arg (1- arg)) (if (<= arg 0) nil (setq initial-col nil) ; Override positioning back to init col (if (not backwards) (allout-next-visible-heading 1) (allout-goto-prefix-doublechecked) (allout-next-visible-heading -1)))) (message "Done.") (cond (on-bullet (goto-char (allout-current-bullet-pos))) (initial-col (move-to-column initial-col))))) ;;;_ > allout-rebullet-heading (&optional solicit ...) (defun allout-rebullet-heading (&optional solicit new-depth number-control index do-successors) "Adjust bullet of current topic prefix. All args are optional. If SOLICIT is non-nil, then the choice of bullet is solicited from user. If it's a character, then that character is offered as the default, otherwise the one suited to the context (according to distinction or depth) is offered. If non-nil, then the context-specific bullet is just used. Second arg DEPTH forces the topic prefix to that depth, regardless of the topic's current depth. Third arg NUMBER-CONTROL can force the prefix to or away from numbered form. It has effect only if `allout-numbered-bullet' is non-nil and soliciting was not explicitly invoked (via first arg). Its effect, numbering or denumbering, then depends on the setting of the forth arg, INDEX. If NUMBER-CONTROL is non-nil and forth arg INDEX is nil, then the prefix of the topic is forced to be non-numbered. Null index and non-nil NUMBER-CONTROL forces denumbering. Non-nil INDEX (and non-nil NUMBER-CONTROL) forces a numbered-prefix form. If non-nil INDEX is a number, then that number is used for the numbered prefix. Non-nil and non-number means that the index for the numbered prefix will be derived by allout-make-topic-prefix. Fifth arg DO-SUCCESSORS t means re-resolve count on succeeding siblings. Cf vars `allout-stylish-prefixes', `allout-old-style-prefixes', and `allout-numbered-bullet', which all affect the behavior of this function." (let* ((current-depth (allout-depth)) (new-depth (or new-depth current-depth)) (mb allout-recent-prefix-beginning) (me allout-recent-prefix-end) (current-bullet (buffer-substring-no-properties (- me 1) me)) (has-annotation (get-text-property mb 'allout-was-hidden)) (new-prefix (allout-make-topic-prefix current-bullet nil new-depth solicit number-control index))) ;; Is new one is identical to old? (if (and (= current-depth new-depth) (string= current-bullet (substring new-prefix (1- (length new-prefix))))) ;; Nothing to do: t ;; New prefix probably different from old: ; get rid of old one: (allout-unprotected (delete-region mb me)) (goto-char mb) ; Dispense with number if ; numbered-bullet prefix: (if (and allout-numbered-bullet (string= allout-numbered-bullet current-bullet) (looking-at "[0-9]+")) (allout-unprotected (delete-region (match-beginning 0)(match-end 0)))) ;; convey 'allout-was-hidden annotation, if original had it: (if has-annotation (put-text-property 0 (length new-prefix) 'allout-was-hidden t new-prefix)) ; Put in new prefix: (allout-unprotected (insert new-prefix)) ;; Reindent the body if elected, margin changed, and not encrypted body: (if (and allout-reindent-bodies (not (= new-depth current-depth)) (not (allout-encrypted-topic-p))) (allout-reindent-body current-depth new-depth)) ;; Recursively rectify successive siblings of orig topic if ;; caller elected for it: (if do-successors (save-excursion (while (allout-next-sibling new-depth nil) (setq index (cond ((numberp index) (1+ index)) ((not number-control) (allout-sibling-index)))) (if (allout-numbered-type-prefix) (allout-rebullet-heading nil ;;; solicit new-depth ;;; new-depth number-control;;; number-control index ;;; index nil))))) ;;;(dont!)do-successors ) ; (if (and (= current-depth new-depth)...)) ) ; let* ((current-depth (allout-depth))...) ) ; defun ;;;_ > allout-rebullet-topic (arg) (defun allout-rebullet-topic (arg &optional sans-offspring) "Rebullet the visible topic containing point and all contained subtopics. Descends into invisible as well as visible topics, however. When optional sans-offspring is non-nil, subtopics are not shifted. (Shifting a topic outwards without shifting its offspring is disallowed, since this would create a \"containment discontinuity\", where the depth difference between a topic and its immediate offspring is greater than one.) With repeat count, shift topic depth by that amount." (interactive "P") (let ((start-col (current-column))) (save-excursion ;; Normalize arg: (cond ((null arg) (setq arg 0)) ((listp arg) (setq arg (car arg)))) ;; Fill the user in, in case we're shifting a big topic: (if (not (zerop arg)) (message "Shifting...")) (allout-back-to-current-heading) (if (<= (+ allout-recent-depth arg) 0) (error "Attempt to shift topic below level 1")) (allout-rebullet-topic-grunt arg nil nil nil nil sans-offspring) (if (not (zerop arg)) (message "Shifting... done."))) (move-to-column (max 0 (+ start-col arg))))) ;;;_ > allout-rebullet-topic-grunt (&optional relative-depth ...) (defun allout-rebullet-topic-grunt (&optional relative-depth starting-depth starting-point index do-successors sans-offspring) "Like `allout-rebullet-topic', but on nearest containing topic \(visible or not). See `allout-rebullet-heading' for rebulleting behavior. All arguments are optional. First arg RELATIVE-DEPTH means to shift the depth of the entire topic that amount. Several subsequent args are for internal recursive use by the function itself: STARTING-DEPTH, STARTING-POINT, and INDEX. Finally, if optional SANS-OFFSPRING is non-nil then the offspring are not shifted. (Shifting a topic outwards without shifting its offspring is disallowed, since this would create a \"containment discontinuity\", where the depth difference between a topic and its immediate offspring is greater than one..)" ;; XXX the recursion here is peculiar, and in general the routine may ;; need simplification with refactoring. (if (and sans-offspring relative-depth (< relative-depth 0)) (error (concat "Attempt to shift topic outwards without offspring," " would cause containment discontinuity."))) (let* ((relative-depth (or relative-depth 0)) (new-depth (allout-depth)) (starting-depth (or starting-depth new-depth)) (on-starting-call (null starting-point)) (index (or index ;; Leave index null on starting call, so rebullet-heading ;; calculates it at what might be new depth: (and (or (zerop relative-depth) (not on-starting-call)) (allout-sibling-index)))) (starting-index index) (moving-outwards (< 0 relative-depth)) (starting-point (or starting-point (point))) (local-point (point))) ;; Sanity check for excessive promotion done only on starting call: (and on-starting-call moving-outwards (> 0 (+ starting-depth relative-depth)) (error "Attempt to shift topic out beyond level 1")) (cond ((= starting-depth new-depth) ;; We're at depth to work on this one. ;; When shifting out we work on the children before working on ;; the parent to avoid interim `allout-aberrant-container-p' ;; aberrancy, and vice-versa when shifting in: (if (>= relative-depth 0) (allout-rebullet-heading nil (+ starting-depth relative-depth) nil ;;; number index nil)) ;;; do-successors (when (not sans-offspring) ;; ... and work on subsequent ones which are at greater depth: (setq index 0) (allout-next-heading) (while (and (not (eobp)) (< starting-depth (allout-depth))) (setq index (1+ index)) (allout-rebullet-topic-grunt relative-depth (1+ starting-depth) starting-point index))) (when (< relative-depth 0) (save-excursion (goto-char local-point) (allout-rebullet-heading nil ;;; solicit (+ starting-depth relative-depth) nil ;;; number starting-index nil)))) ;;; do-successors ((< starting-depth new-depth) ;; Rare case - subtopic more than one level deeper than parent. ;; Treat this one at an even deeper level: (allout-rebullet-topic-grunt relative-depth new-depth starting-point index sans-offspring))) (if on-starting-call (progn ;; Rectify numbering of former siblings of the adjusted topic, ;; if topic has changed depth (if (or do-successors (and (not (zerop relative-depth)) (or (= allout-recent-depth starting-depth) (= allout-recent-depth (+ starting-depth relative-depth))))) (allout-rebullet-heading nil nil nil nil t)) ;; Now rectify numbering of new siblings of the adjusted topic, ;; if depth has been changed: (progn (goto-char starting-point) (if (not (zerop relative-depth)) (allout-rebullet-heading nil nil nil nil t))))) ) ) ;;;_ > allout-renumber-to-depth (&optional depth) (defun allout-renumber-to-depth (&optional depth) "Renumber siblings at current depth. Affects superior topics if optional arg DEPTH is less than current depth. Returns final depth." ;; Proceed by level, processing subsequent siblings on each, ;; ascending until we get shallower than the start depth: (let ((ascender (allout-depth)) was-eobp) (while (and (not (eobp)) (allout-depth) (>= allout-recent-depth depth) (>= ascender depth)) ; Skip over all topics at ; lesser depths, which can not ; have been disturbed: (while (and (not (setq was-eobp (eobp))) (> allout-recent-depth ascender)) (allout-next-heading)) ; Prime ascender for ascension: (setq ascender (1- allout-recent-depth)) (if (>= allout-recent-depth depth) (allout-rebullet-heading nil ;;; solicit nil ;;; depth nil ;;; number-control nil ;;; index t)) ;;; do-successors (if was-eobp (goto-char (point-max))))) allout-recent-depth) ;;;_ > allout-number-siblings (&optional denumber) (defun allout-number-siblings (&optional denumber) "Assign numbered topic prefix to this topic and its siblings. With universal argument, denumber - assign default bullet to this topic and its siblings. With repeated universal argument (`^U^U'), solicit bullet for each rebulleting each topic at this level." (interactive "P") (save-excursion (allout-back-to-current-heading) (allout-beginning-of-level) (let ((depth allout-recent-depth) (index (if (not denumber) 1)) (use-bullet (equal '(16) denumber)) (more t)) (while more (allout-rebullet-heading use-bullet ;;; solicit depth ;;; depth t ;;; number-control index ;;; index nil) ;;; do-successors (if index (setq index (1+ index))) (setq more (allout-next-sibling depth nil)))))) ;;;_ > allout-shift-in (arg) (defun allout-shift-in (arg) "Increase depth of current heading and any items collapsed within it. With a negative argument, the item is shifted out using `allout-shift-out', instead. With an argument greater than one, shift-in the item but not its offspring, making the item into a sibling of its former children, and a child of sibling that formerly preceeded it. You are not allowed to shift the first offspring of a topic inwards, because that would yield a \"containment discontinuity\", where the depth difference between a topic and its immediate offspring is greater than one. The first topic in the file can be adjusted to any positive depth, however." (interactive "p") (if (< arg 0) (allout-shift-out (* arg -1)) ;; refuse to create a containment discontinuity: (save-excursion (allout-back-to-current-heading) (if (not (bobp)) (let* ((current-depth allout-recent-depth) (start-point (point)) (predecessor-depth (progn (forward-char -1) (allout-goto-prefix-doublechecked) (if (< (point) start-point) allout-recent-depth 0)))) (if (and (> predecessor-depth 0) (> (1+ current-depth) (1+ predecessor-depth))) (error (concat "Disallowed shift deeper than" " containing topic's children.")) (allout-back-to-current-heading) (if (< allout-recent-depth (1+ current-depth)) (allout-show-children)))))) (let ((where (point))) (allout-rebullet-topic 1 (and (> arg 1) 'sans-offspring)) (run-hook-with-args 'allout-structure-shifted-hook arg where)))) ;;;_ > allout-shift-out (arg) (defun allout-shift-out (arg) "Decrease depth of current heading and any topics collapsed within it. This will make the item a sibling of its former container. With a negative argument, the item is shifted in using `allout-shift-in', instead. With an argument greater than one, shift-out the item's offspring but not the item itself, making the former children siblings of the item. With an argument greater than 1, the item's offspring are shifted out without shifting the item. This will make the immediate subtopics into siblings of the item." (interactive "p") (if (< arg 0) (allout-shift-in (* arg -1)) ;; Get proper exposure in this area: (save-excursion (if (allout-ascend) (allout-show-children))) ;; Show collapsed children if there's a successor which will become ;; their sibling: (if (and (allout-current-topic-collapsed-p) (save-excursion (allout-next-sibling))) (allout-show-children)) (let ((where (and (allout-depth) allout-recent-prefix-beginning))) (save-excursion (if (> arg 1) ;; Shift the offspring but not the topic: (let ((children-chart (allout-chart-subtree 1))) (if (listp (car children-chart)) ;; whoops: (setq children-chart (allout-flatten children-chart))) (save-excursion (dolist (child-point children-chart) (goto-char child-point) (allout-shift-out 1)))) (allout-rebullet-topic (* arg -1)))) (run-hook-with-args 'allout-structure-shifted-hook (* arg -1) where)))) ;;;_ : Surgery (kill-ring) functions with special provisions for outlines: ;;;_ > allout-kill-line (&optional arg) (defun allout-kill-line (&optional arg) "Kill line, adjusting subsequent lines suitably for outline mode." (interactive "*P") (if (or (not (allout-mode-p)) (not (bolp)) (not (looking-at allout-regexp))) ;; Just do a regular kill: (kill-line arg) ;; Ah, have to watch out for adjustments: (let* ((beg (point)) end (beg-hidden (allout-hidden-p)) (end-hidden (save-excursion (allout-end-of-current-line) (setq end (point)) (allout-hidden-p))) (depth (allout-depth))) (allout-annotate-hidden beg end) (if (and (not beg-hidden) (not end-hidden)) (allout-unprotected (kill-line arg)) (kill-line arg)) (allout-deannotate-hidden beg end) (if allout-numbered-bullet (save-excursion ; Renumber subsequent topics if needed: (if (not (looking-at allout-regexp)) (allout-next-heading)) (allout-renumber-to-depth depth))) (run-hook-with-args 'allout-structure-deleted-hook depth (point))))) ;;;_ > allout-copy-line-as-kill () (defun allout-copy-line-as-kill () "Like allout-kill-topic, but save to kill ring instead of deleting." (interactive) (let ((buffer-read-only t)) (condition-case nil (allout-kill-line) (buffer-read-only nil)))) ;;;_ > allout-kill-topic () (defun allout-kill-topic () "Kill topic together with subtopics. Trailing whitespace is killed with a topic if that whitespace: - would separate the topic from a subsequent sibling - would separate the topic from the end of buffer - would not be added to whitespace already separating the topic from the previous one. Topic exposure is marked with text-properties, to be used by allout-yank-processing for exposure recovery." (interactive) (let* ((inhibit-field-text-motion t) (beg (prog1 (allout-back-to-current-heading) (beginning-of-line))) end (depth allout-recent-depth)) (allout-end-of-current-subtree) (if (and (/= (current-column) 0) (not (eobp))) (forward-char 1)) (if (not (eobp)) (if (and (looking-at "\n") (or (save-excursion (or (not (allout-next-heading)) (= depth allout-recent-depth))) (and (> (- beg (point-min)) 3) (string= (buffer-substring (- beg 2) beg) "\n\n")))) (forward-char 1))) (allout-annotate-hidden beg (setq end (point))) (unwind-protect (allout-unprotected (kill-region beg end)) (if buffer-read-only ;; eg, during copy-as-kill. (allout-deannotate-hidden beg end))) (save-excursion (allout-renumber-to-depth depth)) (run-hook-with-args 'allout-structure-deleted-hook depth (point)))) ;;;_ > allout-copy-topic-as-kill () (defun allout-copy-topic-as-kill () "Like allout-kill-topic, but save to kill ring instead of deleting." (interactive) (let ((buffer-read-only t)) (condition-case nil (allout-kill-topic) (buffer-read-only (message "Topic copied..."))))) ;;;_ > allout-annotate-hidden (begin end) (defun allout-annotate-hidden (begin end) "Qualify text with properties to indicate exposure status." (let ((was-modified (buffer-modified-p)) (buffer-read-only nil)) (allout-deannotate-hidden begin end) (save-excursion (goto-char begin) (let (done next prev overlay) (while (not done) ;; at or advance to start of next hidden region: (if (not (allout-hidden-p)) (setq next (max (1+ (point)) (next-single-char-property-change (point) 'invisible nil end)))) (if (or (not next) (eq prev next)) ;; still not at start of hidden area - must not be any left. (setq done t) (goto-char next) (setq prev next) (if (not (allout-hidden-p)) ;; still not at start of hidden area. (setq done t) (setq overlay (allout-get-invisibility-overlay)) (setq next (overlay-end overlay) prev next) ;; advance to end of this hidden area: (when next (goto-char next) (allout-unprotected (let ((buffer-undo-list t)) (put-text-property (overlay-start overlay) next 'allout-was-hidden t))))))))) (set-buffer-modified-p was-modified))) ;;;_ > allout-deannotate-hidden (begin end) (defun allout-deannotate-hidden (begin end) "Remove allout hidden-text annotation between BEGIN and END." (allout-unprotected (let ((inhibit-read-only t) (buffer-undo-list t)) ;(remove-text-properties begin end '(allout-was-hidden t)) ))) ;;;_ > allout-hide-by-annotation (begin end) (defun allout-hide-by-annotation (begin end) "Translate text properties indicating exposure status into actual exposure." (save-excursion (goto-char begin) (let ((was-modified (buffer-modified-p)) done next prev) (while (not done) ;; at or advance to start of next annotation: (if (not (get-text-property (point) 'allout-was-hidden)) (setq next (next-single-char-property-change (point) 'allout-was-hidden nil end))) (if (or (not next) (eq prev next)) ;; no more or not advancing - must not be any left. (setq done t) (goto-char next) (setq prev next) (if (not (get-text-property (point) 'allout-was-hidden)) ;; still not at start of annotation. (setq done t) ;; advance to just after end of this annotation: (setq next (next-single-char-property-change (point) 'allout-was-hidden nil end)) (overlay-put (make-overlay prev next) 'category 'allout-exposure-category) (allout-deannotate-hidden prev next) (setq prev next) (if next (goto-char next))))) (set-buffer-modified-p was-modified)))) ;;;_ > allout-yank-processing () (defun allout-yank-processing (&optional arg) "Incidental allout-specific business to be done just after text yanks. Does depth adjustment of yanked topics, when: 1 the stuff being yanked starts with a valid outline header prefix, and 2 it is being yanked at the end of a line which consists of only a valid topic prefix. Also, adjusts numbering of subsequent siblings when appropriate. Depth adjustment alters the depth of all the topics being yanked the amount it takes to make the first topic have the depth of the header into which it's being yanked. The point is left in front of yanked, adjusted topics, rather than at the end (and vice-versa with the mark). Non-adjusted yanks, however, are left exactly like normal, non-allout-specific yanks." (interactive "*P") ; Get to beginning, leaving ; region around subject: (if (< (allout-mark-marker t) (point)) (exchange-point-and-mark)) (let* ((subj-beg (point)) (into-bol (bolp)) (subj-end (allout-mark-marker t)) ;; 'resituate' if yanking an entire topic into topic header: (resituate (and (let ((allout-inhibit-aberrance-doublecheck t)) (allout-e-o-prefix-p)) (looking-at allout-regexp) (allout-prefix-data))) ;; `rectify-numbering' if resituating (where several topics may ;; be resituating) or yanking a topic into a topic slot (bol): (rectify-numbering (or resituate (and into-bol (looking-at allout-regexp))))) (if resituate ;; Yanking a topic into the start of a topic - reconcile to fit: (let* ((inhibit-field-text-motion t) (prefix-len (if (not (match-end 1)) 1 (- (match-end 1) subj-beg))) (subj-depth allout-recent-depth) (prefix-bullet (allout-recent-bullet)) (adjust-to-depth ;; Nil if adjustment unnecessary, otherwise depth to which ;; adjustment should be made: (save-excursion (and (goto-char subj-end) (eolp) (goto-char subj-beg) (and (looking-at allout-regexp) (progn (beginning-of-line) (not (= (point) subj-beg))) (looking-at allout-regexp) (allout-prefix-data)) allout-recent-depth))) (more t)) (setq rectify-numbering allout-numbered-bullet) (if adjust-to-depth ; Do the adjustment: (progn (save-restriction (narrow-to-region subj-beg subj-end) ; Trim off excessive blank ; line at end, if any: (goto-char (point-max)) (if (looking-at "^$") (allout-unprotected (delete-char -1))) ; Work backwards, with each ; shallowest level, ; successively excluding the ; last processed topic from ; the narrow region: (while more (allout-back-to-current-heading) ; go as high as we can in each bunch: (while (allout-ascend t)) (save-excursion (allout-unprotected (allout-rebullet-topic-grunt (- adjust-to-depth subj-depth))) (allout-depth)) (if (setq more (not (bobp))) (progn (widen) (forward-char -1) (narrow-to-region subj-beg (point)))))) ;; Preserve new bullet if it's a distinctive one, otherwise ;; use old one: (if (string-match (regexp-quote prefix-bullet) allout-distinctive-bullets-string) ; Delete from bullet of old to ; before bullet of new: (progn (beginning-of-line) (allout-unprotected (delete-region (point) subj-beg)) (set-marker (allout-mark-marker t) subj-end) (goto-char subj-beg) (allout-end-of-prefix)) ; Delete base subj prefix, ; leaving old one: (allout-unprotected (progn (delete-region (point) (+ (point) prefix-len (- adjust-to-depth subj-depth))) ; and delete residual subj ; prefix digits and space: (while (looking-at "[0-9]") (delete-char 1)) (if (looking-at " ") (delete-char 1)))))) (exchange-point-and-mark)))) (if rectify-numbering (progn (save-excursion ; Give some preliminary feedback: (message "... reconciling numbers") ; ... and renumber, in case necessary: (goto-char subj-beg) (if (allout-goto-prefix-doublechecked) (allout-unprotected (allout-rebullet-heading nil ;;; solicit (allout-depth) ;;; depth nil ;;; number-control nil ;;; index t))) (message "")))) (if (or into-bol resituate) (allout-hide-by-annotation (point) (allout-mark-marker t)) (allout-deannotate-hidden (allout-mark-marker t) (point))) (if (not resituate) (exchange-point-and-mark)) (run-hook-with-args 'allout-structure-added-hook subj-beg subj-end))) ;;;_ > allout-yank (&optional arg) (defun allout-yank (&optional arg) "`allout-mode' yank, with depth and numbering adjustment of yanked topics. Non-topic yanks work no differently than normal yanks. If a topic is being yanked into a bare topic prefix, the depth of the yanked topic is adjusted to the depth of the topic prefix. 1 we're yanking in an `allout-mode' buffer 2 the stuff being yanked starts with a valid outline header prefix, and 3 it is being yanked at the end of a line which consists of only a valid topic prefix. If these conditions hold then the depth of the yanked topics are all adjusted the amount it takes to make the first one at the depth of the header into which it's being yanked. The point is left in front of yanked, adjusted topics, rather than at the end (and vice-versa with the mark). Non-adjusted yanks, however, (ones that don't qualify for adjustment) are handled exactly like normal yanks. Numbering of yanked topics, and the successive siblings at the depth into which they're being yanked, is adjusted. `allout-yank-pop' works with `allout-yank' just like normal `yank-pop' works with normal `yank' in non-outline buffers." (interactive "*P") (setq this-command 'yank) (allout-unprotected (yank arg)) (if (allout-mode-p) (allout-yank-processing))) ;;;_ > allout-yank-pop (&optional arg) (defun allout-yank-pop (&optional arg) "Yank-pop like `allout-yank' when popping to bare outline prefixes. Adapts level of popped topics to level of fresh prefix. Note - prefix changes to distinctive bullets will stick, if followed by pops to non-distinctive yanks. Bug..." (interactive "*p") (setq this-command 'yank) (yank-pop arg) (if (allout-mode-p) (allout-yank-processing))) ;;;_ - Specialty bullet functions ;;;_ : File Cross references ;;;_ > allout-resolve-xref () (defun allout-resolve-xref () "Pop to file associated with current heading, if it has an xref bullet. \(Works according to setting of `allout-file-xref-bullet')." (interactive) (if (not allout-file-xref-bullet) (error "Outline cross references disabled - no `allout-file-xref-bullet'") (if (not (string= (allout-current-bullet) allout-file-xref-bullet)) (error "Current heading lacks cross-reference bullet `%s'" allout-file-xref-bullet) (let ((inhibit-field-text-motion t) file-name) (save-excursion (let* ((text-start allout-recent-prefix-end) (heading-end (progn (end-of-line) (point)))) (goto-char text-start) (setq file-name (if (re-search-forward "\\s-\\(\\S-*\\)" heading-end t) (buffer-substring (match-beginning 1) (match-end 1)))))) (setq file-name (expand-file-name file-name)) (if (or (file-exists-p file-name) (if (file-writable-p file-name) (y-or-n-p (format "%s not there, create one? " file-name)) (error "%s not found and can't be created" file-name))) (condition-case failure (find-file-other-window file-name) (error failure)) (error "%s not found" file-name)) ) ) ) ) ;;;_ #6 Exposure Control ;;;_ - Fundamental ;;;_ > allout-flag-region (from to flag) (defun allout-flag-region (from to flag) "Conceal text between FROM and TO if FLAG is non-nil, else reveal it. Exposure-change hook `allout-exposure-change-hook' is run with the same arguments as this function, after the exposure changes are made. (The old `allout-view-change-hook' is being deprecated, and eventually will not be invoked.)" ;; We use outline invisibility spec. (remove-overlays from to 'category 'allout-exposure-category) (when flag (let ((o (make-overlay from to))) (overlay-put o 'category 'allout-exposure-category) (when (featurep 'xemacs) (let ((props (symbol-plist 'allout-exposure-category))) (while props (overlay-put o (pop props) (pop props))))))) (run-hooks 'allout-view-change-hook) (run-hook-with-args 'allout-exposure-change-hook from to flag)) ;;;_ > allout-flag-current-subtree (flag) (defun allout-flag-current-subtree (flag) "Conceal currently-visible topic's subtree if FLAG non-nil, else reveal it." (save-excursion (allout-back-to-current-heading) (let ((inhibit-field-text-motion t)) (end-of-line)) (allout-flag-region (point) ;; Exposing must not leave trailing blanks hidden, ;; but can leave them exposed when hiding, so we ;; can use flag's inverse as the ;; include-trailing-blank cue: (allout-end-of-current-subtree (not flag)) flag))) ;;;_ - Topic-specific ;;;_ > allout-show-entry () (defun allout-show-entry () "Like `allout-show-current-entry', but reveals entries in hidden topics. This is a way to give restricted peek at a concealed locality without the expense of exposing its context, but can leave the outline with aberrant exposure. `allout-show-offshoot' should be used after the peek to rectify the exposure." (interactive) (save-excursion (let (beg end) (allout-goto-prefix-doublechecked) (setq beg (if (allout-hidden-p) (1- (point)) (point))) (setq end (allout-pre-next-prefix)) (allout-flag-region beg end nil) (list beg end)))) ;;;_ > allout-show-children (&optional level strict) (defun allout-show-children (&optional level strict) "If point is visible, show all direct subheadings of this heading. Otherwise, do `allout-show-to-offshoot', and then show subheadings. Optional LEVEL specifies how many levels below the current level should be shown, or all levels if t. Default is 1. Optional STRICT means don't resort to -show-to-offshoot, no matter what. This is basically so -show-to-offshoot, which is called by this function, can employ the pure offspring-revealing capabilities of it. Returns point at end of subtree that was opened, if any. (May get a point of non-opened subtree?)" (interactive "p") (let ((start-point (point))) (if (and (not strict) (allout-hidden-p)) (progn (allout-show-to-offshoot) ; Point's concealed, open to ; expose it. ;; Then recurse, but with "strict" set so we don't ;; infinite regress: (allout-show-children level t)) (save-excursion (allout-beginning-of-current-line) (save-restriction (let* (depth ;; translate the level spec for this routine to the ones ;; used by -chart-subtree and -chart-to-reveal: (chart-level (cond ((not level) 1) ((eq level t) nil) (t level))) (chart (allout-chart-subtree chart-level)) (to-reveal (or (allout-chart-to-reveal chart chart-level) ;; interactive, show discontinuous children: (and chart (interactive-p) (save-excursion (allout-back-to-current-heading) (setq depth (allout-current-depth)) (and (allout-next-heading) (> allout-recent-depth (1+ depth)))) (message "Discontinuous offspring; use `%s %s'%s." (substitute-command-keys "\\[universal-argument]") (substitute-command-keys "\\[allout-shift-out]") " to elevate them.") (allout-chart-to-reveal chart (- allout-recent-depth depth)))))) (goto-char start-point) (when (and strict (allout-hidden-p)) ;; Concealed root would already have been taken care of, ;; unless strict was set. (allout-flag-region (point) (allout-snug-back) nil) (when allout-show-bodies (goto-char (car to-reveal)) (allout-show-current-entry))) (while to-reveal (goto-char (car to-reveal)) (allout-flag-region (save-excursion (allout-snug-back) (point)) (progn (search-forward "\n" nil t) (1- (point))) nil) (when allout-show-bodies (goto-char (car to-reveal)) (allout-show-current-entry)) (setq to-reveal (cdr to-reveal))))))) ;; Compensate for `save-excursion's maintenance of point ;; within invisible text: (goto-char start-point))) ;;;_ > allout-show-to-offshoot () (defun allout-show-to-offshoot () "Like `allout-show-entry', but reveals all concealed ancestors, as well. Useful for coherently exposing to a random point in a hidden region." (interactive) (save-excursion (let ((inhibit-field-text-motion t) (orig-pt (point)) (orig-pref (allout-goto-prefix-doublechecked)) (last-at (point)) (bag-it 0)) (while (or (> bag-it 1) (allout-hidden-p)) (while (allout-hidden-p) (move-beginning-of-line 1) (if (allout-hidden-p) (forward-char -1))) (if (= last-at (setq last-at (point))) ;; Oops, we're not making any progress! Show the current topic ;; completely, and try one more time here, if we haven't already. (progn (beginning-of-line) (allout-show-current-subtree) (goto-char orig-pt) (setq bag-it (1+ bag-it)) (if (> bag-it 1) (error "allout-show-to-offshoot: %s" "Stumped by aberrant nesting."))) (if (> bag-it 0) (setq bag-it 0)) (allout-show-children) (goto-char orig-pref))) (goto-char orig-pt))) (if (allout-hidden-p) (allout-show-entry))) ;;;_ > allout-hide-current-entry () (defun allout-hide-current-entry () "Hide the body directly following this heading." (interactive) (allout-back-to-current-heading) (save-excursion (let ((inhibit-field-text-motion t)) (end-of-line)) (allout-flag-region (point) (progn (allout-end-of-entry) (point)) t))) ;;;_ > allout-show-current-entry (&optional arg) (defun allout-show-current-entry (&optional arg) "Show body following current heading, or hide entry with universal argument." (interactive "P") (if arg (allout-hide-current-entry) (save-excursion (allout-show-to-offshoot)) (save-excursion (allout-flag-region (point) (progn (allout-end-of-entry t) (point)) nil) ))) ;;;_ > allout-show-current-subtree (&optional arg) (defun allout-show-current-subtree (&optional arg) "Show everything within the current topic. With a repeat-count, expose this topic and its siblings." (interactive "P") (save-excursion (if (<= (allout-current-depth) 0) ;; Outside any topics - try to get to the first: (if (not (allout-next-heading)) (error "No topics") ;; got to first, outermost topic - set to expose it and siblings: (message "Above outermost topic - exposing all.") (allout-flag-region (point-min)(point-max) nil)) (allout-beginning-of-current-line) (if (not arg) (allout-flag-current-subtree nil) (allout-beginning-of-level) (allout-expose-topic '(* :)))))) ;;;_ > allout-current-topic-collapsed-p (&optional include-single-liners) (defun allout-current-topic-collapsed-p (&optional include-single-liners) "True if the currently visible containing topic is already collapsed. Single line topics intrinsically can be considered as being both collapsed and uncollapsed. If optional INCLUDE-SINGLE-LINERS is true, then single-line topics are considered to be collapsed. By default, they are treated as being uncollapsed." (save-excursion (and ;; Is the topic all on one line (allowing for trailing blank line)? (>= (progn (allout-back-to-current-heading) (move-end-of-line 1) (point)) (allout-end-of-current-subtree (not (looking-at "\n\n")))) (or include-single-liners (progn (backward-char 1) (allout-hidden-p)))))) ;;;_ > allout-hide-current-subtree (&optional just-close) (defun allout-hide-current-subtree (&optional just-close) "Close the current topic, or containing topic if this one is already closed. If this topic is closed and it's a top level topic, close this topic and its siblings. If optional arg JUST-CLOSE is non-nil, do not close the parent or siblings, even if the target topic is already closed." (interactive) (let* ((from (point)) (sibs-msg "Top-level topic already closed - closing siblings...") (current-exposed (not (allout-current-topic-collapsed-p t)))) (cond (current-exposed (allout-flag-current-subtree t)) (just-close nil) ((allout-ascend) (allout-hide-current-subtree)) (t (goto-char 0) (message sibs-msg) (allout-goto-prefix-doublechecked) (allout-expose-topic '(0 :)) (message (concat sibs-msg " Done.")))) (goto-char from))) ;;;_ > allout-show-current-branches () (defun allout-show-current-branches () "Show all subheadings of this heading, but not their bodies." (interactive) (let ((inhibit-field-text-motion t)) (beginning-of-line)) (allout-show-children t)) ;;;_ > allout-hide-current-leaves () (defun allout-hide-current-leaves () "Hide the bodies of the current topic and all its offspring." (interactive) (allout-back-to-current-heading) (allout-hide-region-body (point) (progn (allout-end-of-current-subtree) (point)))) ;;;_ - Region and beyond ;;;_ > allout-show-all () (defun allout-show-all () "Show all of the text in the buffer." (interactive) (message "Exposing entire buffer...") (allout-flag-region (point-min) (point-max) nil) (message "Exposing entire buffer... Done.")) ;;;_ > allout-hide-bodies () (defun allout-hide-bodies () "Hide all of buffer except headings." (interactive) (allout-hide-region-body (point-min) (point-max))) ;;;_ > allout-hide-region-body (start end) (defun allout-hide-region-body (start end) "Hide all body lines in the region, but not headings." (save-excursion (save-restriction (narrow-to-region start end) (goto-char (point-min)) (let ((inhibit-field-text-motion t)) (while (not (eobp)) (end-of-line) (allout-flag-region (point) (allout-end-of-entry) t) (if (not (eobp)) (forward-char (if (looking-at "\n\n") 2 1)))))))) ;;;_ > allout-expose-topic (spec) (defun allout-expose-topic (spec) "Apply exposure specs to successive outline topic items. Use the more convenient frontend, `allout-new-exposure', if you don't need evaluation of the arguments, or even better, the `allout-layout' variable-keyed mode-activation/auto-exposure feature of allout outline mode. See the respective documentation strings for more details. Cursor is left at start position. SPEC is either a number or a list. Successive specs on a list are applied to successive sibling topics. A simple spec (either a number, one of a few symbols, or the null list) dictates the exposure for the corresponding topic. Non-null lists recursively designate exposure specs for respective subtopics of the current topic. The `:' repeat spec is used to specify exposure for any number of successive siblings, up to the trailing ones for which there are explicit specs following the `:'. Simple (numeric and null-list) specs are interpreted as follows: Numbers indicate the relative depth to open the corresponding topic. - negative numbers force the topic to be closed before opening to the absolute value of the number, so all siblings are open only to that level. - positive numbers open to the relative depth indicated by the number, but do not force already opened subtopics to be closed. - 0 means to close topic - hide all offspring. : - `repeat' apply prior element to all siblings at current level, *up to* those siblings that would be covered by specs following the `:' on the list. Ie, apply to all topics at level but the last ones. (Only first of multiple colons at same level is respected - subsequent ones are discarded.) * - completely opens the topic, including bodies. + - shows all the sub headers, but not the bodies - - exposes the body of the corresponding topic. Examples: \(allout-expose-topic '(-1 : 0)) Close this and all following topics at current level, exposing only their immediate children, but close down the last topic at this current level completely. \(allout-expose-topic '(-1 () : 1 0)) Close current topic so only the immediate subtopics are shown; show the children in the second to last topic, and completely close the last one. \(allout-expose-topic '(-2 : -1 *)) Expose children and grandchildren of all topics at current level except the last two; expose children of the second to last and completely open the last one." (interactive "xExposure spec: ") (if (not (listp spec)) nil (let ((depth (allout-depth)) (max-pos 0) prev-elem curr-elem stay) (while spec (setq prev-elem curr-elem curr-elem (car spec) spec (cdr spec)) (cond ; Do current element: ((null curr-elem) nil) ((symbolp curr-elem) (cond ((eq curr-elem '*) (allout-show-current-subtree) (if (> allout-recent-end-of-subtree max-pos) (setq max-pos allout-recent-end-of-subtree))) ((eq curr-elem '+) (if (not (allout-hidden-p)) (save-excursion (allout-hide-current-subtree t))) (allout-show-current-branches) (if (> allout-recent-end-of-subtree max-pos) (setq max-pos allout-recent-end-of-subtree))) ((eq curr-elem '-) (allout-show-current-entry)) ((eq curr-elem ':) (setq stay t) ;; Expand the `repeat' spec to an explicit version, ;; w.r.t. remaining siblings: (let ((residue ; = # of sibs not covered by remaining spec ;; Dang - could be nice to make use of the chart, sigh: (- (length (allout-chart-siblings)) (length spec)))) (if (< 0 residue) ;; Some residue - cover it with prev-elem: (setq spec (append (make-list residue prev-elem) spec))))))) ((numberp curr-elem) (if (and (>= 0 curr-elem) (not (allout-hidden-p))) (save-excursion (allout-hide-current-subtree t) (if (> 0 curr-elem) nil (if (> allout-recent-end-of-subtree max-pos) (setq max-pos allout-recent-end-of-subtree))))) (if (> (abs curr-elem) 0) (progn (allout-show-children (abs curr-elem)) (if (> allout-recent-end-of-subtree max-pos) (setq max-pos allout-recent-end-of-subtree))))) ((listp curr-elem) (if (allout-descend-to-depth (1+ depth)) (let ((got (allout-expose-topic curr-elem))) (if (and got (> got max-pos)) (setq max-pos got)))))) (cond (stay (setq stay nil)) ((listp (car spec)) nil) ((> max-pos (point)) ;; Capitalize on max-pos state to get us nearer next sibling: (progn (goto-char (min (point-max) max-pos)) (allout-next-heading))) ((allout-next-sibling depth)))) max-pos))) ;;;_ > allout-old-expose-topic (spec &rest followers) (defun allout-old-expose-topic (spec &rest followers) "Deprecated. Use `allout-expose-topic' (with different schema format) instead. Dictate wholesale exposure scheme for current topic, according to SPEC. SPEC is either a number or a list. Optional successive args dictate exposure for subsequent siblings of current topic. A simple spec (either a number, a special symbol, or the null list) dictates the overall exposure for a topic. Non null lists are composite specs whose first element dictates the overall exposure for a topic, with the subsequent elements in the list interpreted as specs that dictate the exposure for the successive offspring of the topic. Simple (numeric and null-list) specs are interpreted as follows: - Numbers indicate the relative depth to open the corresponding topic: - negative numbers force the topic to be close before opening to the absolute value of the number. - positive numbers just open to the relative depth indicated by the number. - 0 just closes - `*' completely opens the topic, including bodies. - `+' shows all the sub headers, but not the bodies - `-' exposes the body and immediate offspring of the corresponding topic. If the spec is a list, the first element must be a number, which dictates the exposure depth of the topic as a whole. Subsequent elements of the list are nested SPECs, dictating the specific exposure for the corresponding offspring of the topic. Optional FOLLOWERS arguments dictate exposure for succeeding siblings." (interactive "xExposure spec: ") (let ((inhibit-field-text-motion t) (depth (allout-current-depth)) max-pos) (cond ((null spec) nil) ((symbolp spec) (if (eq spec '*) (allout-show-current-subtree)) (if (eq spec '+) (allout-show-current-branches)) (if (eq spec '-) (allout-show-current-entry))) ((numberp spec) (if (>= 0 spec) (save-excursion (allout-hide-current-subtree t) (end-of-line) (if (or (not max-pos) (> (point) max-pos)) (setq max-pos (point))) (if (> 0 spec) (setq spec (* -1 spec))))) (if (> spec 0) (allout-show-children spec))) ((listp spec) ;(let ((got (allout-old-expose-topic (car spec)))) ; (if (and got (or (not max-pos) (> got max-pos))) ; (setq max-pos got))) (let ((new-depth (+ (allout-current-depth) 1)) got) (setq max-pos (allout-old-expose-topic (car spec))) (setq spec (cdr spec)) (if (and spec (allout-descend-to-depth new-depth) (not (allout-hidden-p))) (progn (setq got (apply 'allout-old-expose-topic spec)) (if (and got (or (not max-pos) (> got max-pos))) (setq max-pos got))))))) (while (and followers (progn (if (and max-pos (< (point) max-pos)) (progn (goto-char max-pos) (setq max-pos nil))) (end-of-line) (allout-next-sibling depth))) (allout-old-expose-topic (car followers)) (setq followers (cdr followers))) max-pos)) ;;;_ > allout-new-exposure '() (defmacro allout-new-exposure (&rest spec) "Literal frontend for `allout-expose-topic', doesn't evaluate arguments. Some arguments that would need to be quoted in `allout-expose-topic' need not be quoted in `allout-new-exposure'. Cursor is left at start position. Use this instead of obsolete `allout-exposure'. Examples: \(allout-new-exposure (-1 () () () 1) 0) Close current topic at current level so only the immediate subtopics are shown, except also show the children of the third subtopic; and close the next topic at the current level. \(allout-new-exposure : -1 0) Close all topics at current level to expose only their immediate children, except for the last topic at the current level, in which even its immediate children are hidden. \(allout-new-exposure -2 : -1 *) Expose children and grandchildren of first topic at current level, and expose children of subsequent topics at current level *except* for the last, which should be opened completely." (list 'save-excursion '(if (not (or (allout-goto-prefix-doublechecked) (allout-next-heading))) (error "allout-new-exposure: Can't find any outline topics")) (list 'allout-expose-topic (list 'quote spec)))) ;;;_ #7 Systematic outline presentation - copying, printing, flattening ;;;_ - Mapping and processing of topics ;;;_ ( See also Subtree Charting, in Navigation code.) ;;;_ > allout-stringify-flat-index (flat-index) (defun allout-stringify-flat-index (flat-index &optional context) "Convert list representing section/subsection/... to document string. Optional arg CONTEXT indicates interior levels to include." (let ((delim ".") result numstr (context-depth (or (and context 2) 1))) ;; Take care of the explicit context: (while (> context-depth 0) (setq numstr (int-to-string (car flat-index)) flat-index (cdr flat-index) result (if flat-index (cons delim (cons numstr result)) (cons numstr result)) context-depth (if flat-index (1- context-depth) 0))) (setq delim " ") ;; Take care of the indentation: (if flat-index (progn (while flat-index (setq result (cons delim (cons (make-string (1+ (truncate (if (zerop (car flat-index)) 1 (log10 (car flat-index))))) ? ) result))) (setq flat-index (cdr flat-index))) ;; Dispose of single extra delim: (setq result (cdr result)))) (apply 'concat result))) ;;;_ > allout-stringify-flat-index-plain (flat-index) (defun allout-stringify-flat-index-plain (flat-index) "Convert list representing section/subsection/... to document string." (let ((delim ".") result) (while flat-index (setq result (cons (int-to-string (car flat-index)) (if result (cons delim result)))) (setq flat-index (cdr flat-index))) (apply 'concat result))) ;;;_ > allout-stringify-flat-index-indented (flat-index) (defun allout-stringify-flat-index-indented (flat-index) "Convert list representing section/subsection/... to document string." (let ((delim ".") result numstr) ;; Take care of the explicit context: (setq numstr (int-to-string (car flat-index)) flat-index (cdr flat-index) result (if flat-index (cons delim (cons numstr result)) (cons numstr result))) (setq delim " ") ;; Take care of the indentation: (if flat-index (progn (while flat-index (setq result (cons delim (cons (make-string (1+ (truncate (if (zerop (car flat-index)) 1 (log10 (car flat-index))))) ? ) result))) (setq flat-index (cdr flat-index))) ;; Dispose of single extra delim: (setq result (cdr result)))) (apply 'concat result))) ;;;_ > allout-listify-exposed (&optional start end format) (defun allout-listify-exposed (&optional start end format) "Produce a list representing exposed topics in current region. This list can then be used by `allout-process-exposed' to manipulate the subject region. Optional START and END indicate bounds of region. optional arg, FORMAT, designates an alternate presentation form for the prefix: list - Present prefix as numeric section.subsection..., starting with section indicated by the list, innermost nesting first. `indent' (symbol) - Convert header prefixes to all white space, except for distinctive bullets. The elements of the list produced are lists that represents a topic header and body. The elements of that list are: - a number representing the depth of the topic, - a string representing the header-prefix, including trailing whitespace and bullet. - a string representing the bullet character, - and a series of strings, each containing one line of the exposed portion of the topic entry." (interactive "r") (save-excursion (let* ((inhibit-field-text-motion t) ;; state vars: strings prefix result depth new-depth out gone-out bullet beg next done) (goto-char start) (beginning-of-line) ;; Goto initial topic, and register preceeding stuff, if any: (if (> (allout-goto-prefix-doublechecked) start) ;; First topic follows beginning point - register preliminary stuff: (setq result (list (list 0 "" nil (buffer-substring start (1- (point))))))) (while (and (not done) (not (eobp)) ; Loop until we've covered the region. (not (> (point) end))) (setq depth allout-recent-depth ; Current topics depth, bullet (allout-recent-bullet) ; ... bullet, prefix (allout-recent-prefix) beg (progn (allout-end-of-prefix t) (point))) ; and beginning. (setq done ; The boundary for the current topic: (not (allout-next-visible-heading 1))) (setq new-depth allout-recent-depth) (setq gone-out out out (< new-depth depth)) (beginning-of-line) (setq next (point)) (goto-char beg) (setq strings nil) (while (> next (point)) ; Get all the exposed text in (setq strings (cons (buffer-substring beg ;To hidden text or end of line: (progn (end-of-line) (allout-back-to-visible-text))) strings)) (when (< (point) next) ; Resume from after hid text, if any. (line-move 1) (beginning-of-line)) (setq beg (point))) ;; Accumulate list for this topic: (setq strings (nreverse strings)) (setq result (cons (if format (let ((special (if (string-match (regexp-quote bullet) allout-distinctive-bullets-string) bullet))) (cond ((listp format) (list depth (if allout-abbreviate-flattened-numbering (allout-stringify-flat-index format gone-out) (allout-stringify-flat-index-plain format)) strings special)) ((eq format 'indent) (if special (list depth (concat (make-string (1+ depth) ? ) (substring prefix -1)) strings) (list depth (make-string depth ? ) strings))) (t (error "allout-listify-exposed: %s %s" "invalid format" format)))) (list depth prefix strings)) result)) ;; Reasses format, if any: (if (and format (listp format)) (cond ((= new-depth depth) (setq format (cons (1+ (car format)) (cdr format)))) ((> new-depth depth) ; descending - assume by 1: (setq format (cons 1 format))) (t ; Pop the residue: (while (< new-depth depth) (setq format (cdr format)) (setq depth (1- depth))) ; And increment the current one: (setq format (cons (1+ (or (car format) -1)) (cdr format))))))) ;; Put the list with first at front, to last at back: (nreverse result)))) ;;;_ > my-region-active-p () (defmacro my-region-active-p () (if (fboundp 'region-active-p) '(region-active-p) 'mark-active)) ;;;_ > allout-process-exposed (&optional func from to frombuf ;;; tobuf format) (defun allout-process-exposed (&optional func from to frombuf tobuf format start-num) "Map function on exposed parts of current topic; results to another buffer. All args are options; default values itemized below. Apply FUNCTION to exposed portions FROM position TO position in buffer FROMBUF to buffer TOBUF. Sixth optional arg, FORMAT, designates an alternate presentation form: `flat' - Present prefix as numeric section.subsection..., starting with section indicated by the start-num, innermost nesting first. X`flat-indented' - Prefix is like `flat' for first topic at each X level, but subsequent topics have only leaf topic X number, padded with blanks to line up with first. `indent' (symbol) - Convert header prefixes to all white space, except for distinctive bullets. Defaults: FUNCTION: `allout-insert-listified' FROM: region start, if region active, else start of buffer TO: region end, if region active, else end of buffer FROMBUF: current buffer TOBUF: buffer name derived: \"*current-buffer-name exposed*\" FORMAT: nil" ; Resolve arguments, ; defaulting if necessary: (if (not func) (setq func 'allout-insert-listified)) (if (not (and from to)) (if (my-region-active-p) (setq from (region-beginning) to (region-end)) (setq from (point-min) to (point-max)))) (if frombuf (if (not (bufferp frombuf)) ;; Specified but not a buffer - get it: (let ((got (get-buffer frombuf))) (if (not got) (error (concat "allout-process-exposed: source buffer " frombuf " not found.")) (setq frombuf got)))) ;; not specified - default it: (setq frombuf (current-buffer))) (if tobuf (if (not (bufferp tobuf)) (setq tobuf (get-buffer-create tobuf))) ;; not specified - default it: (setq tobuf (concat "*" (buffer-name frombuf) " exposed*"))) (if (listp format) (nreverse format)) (let* ((listified (progn (set-buffer frombuf) (allout-listify-exposed from to format)))) (set-buffer tobuf) (mapcar func listified) (pop-to-buffer tobuf))) ;;;_ - Copy exposed ;;;_ > allout-insert-listified (listified) (defun allout-insert-listified (listified) "Insert contents of listified outline portion in current buffer. LISTIFIED is a list representing each topic header and body: \`(depth prefix text)' or \`(depth prefix text bullet-plus)' If `bullet-plus' is specified, it is inserted just after the entire prefix." (setq listified (cdr listified)) (let ((prefix (prog1 (car listified) (setq listified (cdr listified)))) (text (prog1 (car listified) (setq listified (cdr listified)))) (bullet-plus (car listified))) (insert prefix) (if bullet-plus (insert (concat " " bullet-plus))) (while text (insert (car text)) (if (setq text (cdr text)) (insert "\n"))) (insert "\n"))) ;;;_ > allout-copy-exposed-to-buffer (&optional arg tobuf format) (defun allout-copy-exposed-to-buffer (&optional arg tobuf format) "Duplicate exposed portions of current outline to another buffer. Other buffer has current buffers name with \" exposed\" appended to it. With repeat count, copy the exposed parts of only the current topic. Optional second arg TOBUF is target buffer name. Optional third arg FORMAT, if non-nil, symbolically designates an alternate presentation format for the outline: `flat' - Convert topic header prefixes to numeric section.subsection... identifiers. `indent' - Convert header prefixes to all white space, except for distinctive bullets. `indent-flat' - The best of both - only the first of each level has the full path, the rest have only the section number of the leaf, preceded by the right amount of indentation." (interactive "P") (if (not tobuf) (setq tobuf (get-buffer-create (concat "*" (buffer-name) " exposed*")))) (let* ((start-pt (point)) (beg (if arg (allout-back-to-current-heading) (point-min))) (end (if arg (allout-end-of-current-subtree) (point-max))) (buf (current-buffer)) (start-list ())) (if (eq format 'flat) (setq format (if arg (save-excursion (goto-char beg) (allout-topic-flat-index)) '(1)))) (save-excursion (set-buffer tobuf)(erase-buffer)) (allout-process-exposed 'allout-insert-listified beg end (current-buffer) tobuf format start-list) (goto-char (point-min)) (pop-to-buffer buf) (goto-char start-pt))) ;;;_ > allout-flatten-exposed-to-buffer (&optional arg tobuf) (defun allout-flatten-exposed-to-buffer (&optional arg tobuf) "Present numeric outline of outline's exposed portions in another buffer. The resulting outline is not compatible with outline mode - use `allout-copy-exposed-to-buffer' if you want that. Use `allout-indented-exposed-to-buffer' for indented presentation. With repeat count, copy the exposed portions of only current topic. Other buffer has current buffer's name with \" exposed\" appended to it, unless optional second arg TOBUF is specified, in which case it is used verbatim." (interactive "P") (allout-copy-exposed-to-buffer arg tobuf 'flat)) ;;;_ > allout-indented-exposed-to-buffer (&optional arg tobuf) (defun allout-indented-exposed-to-buffer (&optional arg tobuf) "Present indented outline of outline's exposed portions in another buffer. The resulting outline is not compatible with outline mode - use `allout-copy-exposed-to-buffer' if you want that. Use `allout-flatten-exposed-to-buffer' for numeric sectional presentation. With repeat count, copy the exposed portions of only current topic. Other buffer has current buffer's name with \" exposed\" appended to it, unless optional second arg TOBUF is specified, in which case it is used verbatim." (interactive "P") (allout-copy-exposed-to-buffer arg tobuf 'indent)) ;;;_ - LaTeX formatting ;;;_ > allout-latex-verb-quote (string &optional flow) (defun allout-latex-verb-quote (string &optional flow) "Return copy of STRING for literal reproduction across LaTeX processing. Expresses the original characters (including carriage returns) of the string across LaTeX processing." (mapconcat (function (lambda (char) (cond ((memq char '(?\\ ?$ ?% ?# ?& ?{ ?} ?_ ?^ ?- ?*)) (concat "\\char" (number-to-string char) "{}")) ((= char ?\n) "\\\\") (t (char-to-string char))))) string "")) ;;;_ > allout-latex-verbatim-quote-curr-line () (defun allout-latex-verbatim-quote-curr-line () "Express line for exact (literal) representation across LaTeX processing. Adjust line contents so it is unaltered (from the original line) across LaTeX processing, within the context of a `verbatim' environment. Leaves point at the end of the line." (let ((inhibit-field-text-motion t)) (beginning-of-line) (let ((beg (point)) (end (progn (end-of-line)(point)))) (goto-char beg) (while (re-search-forward "\\\\" ;;"\\\\\\|\\{\\|\\}\\|\\_\\|\\$\\|\\\"\\|\\&\\|\\^\\|\\-\\|\\*\\|#" end ; bounded by end-of-line 1) ; no matches, move to end & return nil (goto-char (match-beginning 2)) (insert "\\") (setq end (1+ end)) (goto-char (1+ (match-end 2))))))) ;;;_ > allout-insert-latex-header (buffer) (defun allout-insert-latex-header (buffer) "Insert initial LaTeX commands at point in BUFFER." ;; Much of this is being derived from the stuff in appendix of E in ;; the TeXBook, pg 421. (set-buffer buffer) (let ((doc-style (format "\n\\documentstyle{%s}\n" "report")) (page-numbering (if allout-number-pages "\\pagestyle{empty}\n" "")) (titlecmd (format "\\newcommand{\\titlecmd}[1]{{%s #1}}\n" allout-title-style)) (labelcmd (format "\\newcommand{\\labelcmd}[1]{{%s #1}}\n" allout-label-style)) (headlinecmd (format "\\newcommand{\\headlinecmd}[1]{{%s #1}}\n" allout-head-line-style)) (bodylinecmd (format "\\newcommand{\\bodylinecmd}[1]{{%s #1}}\n" allout-body-line-style)) (setlength (format "%s%s%s%s" "\\newlength{\\stepsize}\n" "\\setlength{\\stepsize}{" allout-indent "}\n")) (oneheadline (format "%s%s%s%s%s%s%s" "\\newcommand{\\OneHeadLine}[3]{%\n" "\\noindent%\n" "\\hspace*{#2\\stepsize}%\n" "\\labelcmd{#1}\\hspace*{.2cm}" "\\headlinecmd{#3}\\\\[" allout-line-skip "]\n}\n")) (onebodyline (format "%s%s%s%s%s%s" "\\newcommand{\\OneBodyLine}[2]{%\n" "\\noindent%\n" "\\hspace*{#1\\stepsize}%\n" "\\bodylinecmd{#2}\\\\[" allout-line-skip "]\n}\n")) (begindoc "\\begin{document}\n\\begin{center}\n") (title (format "%s%s%s%s" "\\titlecmd{" (allout-latex-verb-quote (if allout-title (condition-case nil (eval allout-title) (error "")) "Unnamed Outline")) "}\n" "\\end{center}\n\n")) (hsize "\\hsize = 7.5 true in\n") (hoffset "\\hoffset = -1.5 true in\n") (vspace "\\vspace{.1cm}\n\n")) (insert (concat doc-style page-numbering titlecmd labelcmd headlinecmd bodylinecmd setlength oneheadline onebodyline begindoc title hsize hoffset vspace) ))) ;;;_ > allout-insert-latex-trailer (buffer) (defun allout-insert-latex-trailer (buffer) "Insert concluding LaTeX commands at point in BUFFER." (set-buffer buffer) (insert "\n\\end{document}\n")) ;;;_ > allout-latexify-one-item (depth prefix bullet text) (defun allout-latexify-one-item (depth prefix bullet text) "Insert LaTeX commands for formatting one outline item. Args are the topics numeric DEPTH, the header PREFIX lead string, the BULLET string, and a list of TEXT strings for the body." (let* ((head-line (if text (car text))) (body-lines (cdr text)) (curr-line) body-content bop) ; Do the head line: (insert (concat "\\OneHeadLine{\\verb\1 " (allout-latex-verb-quote bullet) "\1}{" depth "}{\\verb\1 " (if head-line (allout-latex-verb-quote head-line) "") "\1}\n")) (if (not body-lines) nil ;;(insert "\\beginlines\n") (insert "\\begin{verbatim}\n") (while body-lines (setq curr-line (car body-lines)) (if (and (not body-content) (not (string-match "^\\s-*$" curr-line))) (setq body-content t)) ; Mangle any occurrences of ; "\end{verbatim}" in text, ; it's special: (if (and body-content (setq bop (string-match "\\end{verbatim}" curr-line))) (setq curr-line (concat (substring curr-line 0 bop) ">" (substring curr-line bop)))) ;;(insert "|" (car body-lines) "|") (insert curr-line) (allout-latex-verbatim-quote-curr-line) (insert "\n") (setq body-lines (cdr body-lines))) (if body-content (setq body-content nil) (forward-char -1) (insert "\\ ") (forward-char 1)) ;;(insert "\\endlines\n") (insert "\\end{verbatim}\n") ))) ;;;_ > allout-latexify-exposed (arg &optional tobuf) (defun allout-latexify-exposed (arg &optional tobuf) "Format current topics exposed portions to TOBUF for LaTeX processing. TOBUF defaults to a buffer named the same as the current buffer, but with \"*\" prepended and \" latex-formed*\" appended. With repeat count, copy the exposed portions of entire buffer." (interactive "P") (if (not tobuf) (setq tobuf (get-buffer-create (concat "*" (buffer-name) " latexified*")))) (let* ((start-pt (point)) (beg (if arg (point-min) (allout-back-to-current-heading))) (end (if arg (point-max) (allout-end-of-current-subtree))) (buf (current-buffer))) (set-buffer tobuf) (erase-buffer) (allout-insert-latex-header tobuf) (goto-char (point-max)) (allout-process-exposed 'allout-latexify-one-item beg end buf tobuf) (goto-char (point-max)) (allout-insert-latex-trailer tobuf) (goto-char (point-min)) (pop-to-buffer buf) (goto-char start-pt))) ;;;_ #8 Encryption ;;;_ > allout-toggle-current-subtree-encryption (&optional fetch-pass) (defun allout-toggle-current-subtree-encryption (&optional fetch-pass) "Encrypt clear or decrypt encoded text of visibly-containing topic's contents. Optional FETCH-PASS universal argument provokes key-pair encryption with single universal argument. With doubled universal argument (value = 16), it forces prompting for the passphrase regardless of availability from the passphrase cache. With no universal argument, the appropriate passphrase is obtained from the cache, if available, else from the user. Only GnuPG encryption is supported. \*NOTE WELL* that the encrypted text must be ascii-armored. For gnupg encryption, include the option ``armor'' in your ~/.gnupg/gpg.conf file. Both symmetric-key and key-pair encryption is implemented. Symmetric is the default, use a single (x4) universal argument for keypair mode. Encrypted topic's bullet is set to a `~' to signal that the contents of the topic (body and subtopics, but not heading) is pending encryption or encrypted. `*' asterisk immediately after the bullet signals that the body is encrypted, its' absence means the topic is meant to be encrypted but is not. When a file with topics pending encryption is saved, topics pending encryption are encrypted. See allout-encrypt-unencrypted-on-saves for auto-encryption specifics. \*NOTE WELL* that automatic encryption that happens during saves will default to symmetric encryption - you must deliberately (re)encrypt key-pair encrypted topics if you want them to continue to use the key-pair cipher. Level-one topics, with prefix consisting solely of an `*' asterisk, cannot be encrypted. If you want to encrypt the contents of a top-level topic, use \\[allout-shift-in] to increase its depth. Passphrase Caching The encryption passphrase is solicited if not currently available in the passphrase cache from a recent encryption action. The solicited passphrase is retained for reuse in a cache, if enabled. See `pgg-cache-passphrase' and `pgg-passphrase-cache-expiry' for details. Symmetric Passphrase Hinting and Verification If the file previously had no associated passphrase, or had a different passphrase than specified, the user is prompted to repeat the new one for corroboration. A random string encrypted by the new passphrase is set on the buffer-specific variable `allout-passphrase-verifier-string', for confirmation of the passphrase when next obtained, before encrypting or decrypting anything with it. This helps avoid mistakenly shifting between keys. If allout customization var `allout-passphrase-verifier-handling' is non-nil, an entry for `allout-passphrase-verifier-string' and its value is added to an Emacs 'local variables' section at the end of the file, which is created if necessary. That setting is for retention of the passphrase verifier across Emacs sessions. Similarly, `allout-passphrase-hint-string' stores a user-provided reminder about their passphrase, and `allout-passphrase-hint-handling' specifies when the hint is presented, or if passphrase hints are disabled. If enabled (see the `allout-passphrase-hint-handling' docstring for details), the hint string is stored in the local-variables section of the file, and solicited whenever the passphrase is changed." (interactive "P") (save-excursion (allout-back-to-current-heading) (allout-toggle-subtree-encryption fetch-pass) ) ) ;;;_ > allout-toggle-subtree-encryption (&optional fetch-pass) (defun allout-toggle-subtree-encryption (&optional fetch-pass) "Encrypt clear text or decrypt encoded topic contents (body and subtopics.) Optional FETCH-PASS universal argument provokes key-pair encryption with single universal argument. With doubled universal argument (value = 16), it forces prompting for the passphrase regardless of availability from the passphrase cache. With no universal argument, the appropriate passphrase is obtained from the cache, if available, else from the user. Currently only GnuPG encryption is supported, and integration with gpg-agent is not yet implemented. \**NOTE WELL** that the encrypted text must be ascii-armored. For gnupg encryption, include the option ``armor'' in your ~/.gnupg/gpg.conf file. See `allout-toggle-current-subtree-encryption' for more details." (interactive "P") (save-excursion (allout-end-of-prefix t) (if (= allout-recent-depth 1) (error (concat "Cannot encrypt or decrypt level 1 topics -" " shift it in to make it encryptable"))) (let* ((allout-buffer (current-buffer)) ;; Assess location: (bullet-pos allout-recent-prefix-beginning) (after-bullet-pos (point)) (was-encrypted (progn (if (= (point-max) after-bullet-pos) (error "no body to encrypt")) (allout-encrypted-topic-p))) (was-collapsed (if (not (search-forward "\n" nil t)) nil (backward-char 1) (allout-hidden-p))) (subtree-beg (1+ (point))) (subtree-end (allout-end-of-subtree)) (subject-text (buffer-substring-no-properties subtree-beg subtree-end)) (subtree-end-char (char-after (1- subtree-end))) (subtree-trailing-char (char-after subtree-end)) ;; kluge - result-text needs to be nil, but we also want to ;; check for the error condition (result-text (if (or (string= "" subject-text) (string= "\n" subject-text)) (error "No topic contents to %scrypt" (if was-encrypted "de" "en")) nil)) ;; Assess key parameters: (key-info (or ;; detect the type by which it is already encrypted (and was-encrypted (allout-encrypted-key-info subject-text)) (and (member fetch-pass '(4 (4))) '(keypair nil)) '(symmetric nil))) (for-key-type (car key-info)) (for-key-identity (cadr key-info)) (fetch-pass (and fetch-pass (member fetch-pass '(16 (16))))) (was-coding-system buffer-file-coding-system)) (when (not was-encrypted) ;; ensure that non-ascii chars pending encryption are noticed before ;; they're encrypted, so the coding system is set to accomodate ;; them. (setq buffer-file-coding-system (select-safe-coding-system subtree-beg subtree-end)) ;; if the coding system for the text being encrypted is different ;; than that prevailing, then there a real risk that the coding ;; system can't be noticed by emacs when the file is visited. to ;; mitigate that, offer to preserve the coding system using a file ;; local variable. (if (and (not (equal buffer-file-coding-system was-coding-system)) (yes-or-no-p (format (concat "Register coding system %s as file local" " var? Necessary when only encrypted text" " is in that coding system. ") buffer-file-coding-system))) (allout-adjust-file-variable "buffer-file-coding-system" buffer-file-coding-system))) (setq result-text (allout-encrypt-string subject-text was-encrypted (current-buffer) for-key-type for-key-identity fetch-pass)) ;; Replace the subtree with the processed product. (allout-unprotected (progn (set-buffer allout-buffer) (delete-region subtree-beg subtree-end) (insert result-text) (if was-collapsed (allout-flag-region (1- subtree-beg) (point) t)) ;; adjust trailing-blank-lines to preserve topic spacing: (if (not was-encrypted) (if (and (= subtree-end-char ?\n) (= subtree-trailing-char ?\n)) (insert subtree-trailing-char))) ;; Ensure that the item has an encrypted-entry bullet: (if (not (string= (buffer-substring-no-properties (1- after-bullet-pos) after-bullet-pos) allout-topic-encryption-bullet)) (progn (goto-char (1- after-bullet-pos)) (delete-char 1) (insert allout-topic-encryption-bullet))) (if was-encrypted ;; Remove the is-encrypted bullet qualifier: (progn (goto-char after-bullet-pos) (delete-char 1)) ;; Add the is-encrypted bullet qualifier: (goto-char after-bullet-pos) (insert "*")))) (run-hook-with-args 'allout-structure-added-hook bullet-pos subtree-end)))) ;;;_ > allout-encrypt-string (text decrypt allout-buffer key-type for-key ;;; fetch-pass &optional retried verifying ;;; passphrase) (defun allout-encrypt-string (text decrypt allout-buffer key-type for-key fetch-pass &optional retried rejected verifying passphrase) "Encrypt or decrypt message TEXT. If DECRYPT is true (default false), then decrypt instead of encrypt. FETCH-PASS (default false) forces fresh prompting for the passphrase. KEY-TYPE indicates whether to use a 'symmetric or 'keypair cipher. FOR-KEY is human readable identification of the first of the user's eligible secret keys a keypair decryption targets, or else nil. Optional RETRIED is for internal use - conveys the number of failed keys that have been solicited in sequence leading to this current call. Optional PASSPHRASE enables explicit delivery of the decryption passphrase, for verification purposes. Optional REJECTED is for internal use - conveys the number of rejections due to matches against `allout-encryption-ciphertext-rejection-regexps', as limited by `allout-encryption-ciphertext-rejection-ceiling'. Returns the resulting string, or nil if the transformation fails." (require 'pgg) (if (not (fboundp 'pgg-encrypt-symmetric)) (error "Allout encryption depends on a newer version of pgg")) (let* ((scheme (upcase (format "%s" (or pgg-scheme pgg-default-scheme "GPG")))) (for-key (and (equal key-type 'keypair) (or for-key (split-string (read-string (format "%s message recipients: " scheme)) "[ \t,]+")))) (target-prompt-id (if (equal key-type 'keypair) (if (= (length for-key) 1) (car for-key) for-key) (buffer-name allout-buffer))) (target-cache-id (format "%s-%s" key-type (if (equal key-type 'keypair) target-prompt-id (or (buffer-file-name allout-buffer) target-prompt-id)))) (encoding (with-current-buffer allout-buffer buffer-file-coding-system)) (multibyte (with-current-buffer allout-buffer enable-multibyte-characters)) (strip-plaintext-regexps (if (not decrypt) (allout-get-configvar-values 'allout-encryption-plaintext-sanitization-regexps))) (reject-ciphertext-regexps (if (not decrypt) (allout-get-configvar-values 'allout-encryption-ciphertext-rejection-regexps))) (rejected (or rejected 0)) (rejections-left (- allout-encryption-ciphertext-rejection-ceiling rejected)) result-text status ) (if (and fetch-pass (not passphrase)) ;; Force later fetch by evicting passphrase from the cache. (pgg-remove-passphrase-from-cache target-cache-id t)) (catch 'encryption-failed ;; We handle only symmetric-key passphrase caching. (if (and (not passphrase) (not (equal key-type 'keypair))) (setq passphrase (allout-obtain-passphrase for-key target-cache-id target-prompt-id key-type allout-buffer retried fetch-pass))) (with-temp-buffer (insert text) ;; convey the text characteristics of the original buffer: (set-buffer-multibyte multibyte) (when encoding (set-buffer-file-coding-system encoding) (if (not decrypt) (encode-coding-region (point-min) (point-max) encoding))) (when (and strip-plaintext-regexps (not decrypt)) (dolist (re strip-plaintext-regexps) (let ((re (if (listp re) (car re) re)) (replacement (if (listp re) (cadr re) ""))) (goto-char (point-min)) (while (re-search-forward re nil t) (replace-match replacement nil nil))))) (cond ;; symmetric: ((equal key-type 'symmetric) (setq status (if decrypt (pgg-decrypt (point-min) (point-max) passphrase) (pgg-encrypt-symmetric (point-min) (point-max) passphrase))) (if status (pgg-situate-output (point-min) (point-max)) ;; failed - handle passphrase caching (if verifying (throw 'encryption-failed nil) (pgg-remove-passphrase-from-cache target-cache-id t) (error "Symmetric-cipher %scryption failed - %s" (if decrypt "de" "en") "try again with different passphrase.")))) ;; encrypt 'keypair: ((not decrypt) (setq status (pgg-encrypt for-key nil (point-min) (point-max) passphrase)) (if status (pgg-situate-output (point-min) (point-max)) (error (pgg-remove-passphrase-from-cache target-cache-id t) (error "encryption failed")))) ;; decrypt 'keypair: (t (setq status (pgg-decrypt (point-min) (point-max) passphrase)) (if status (pgg-situate-output (point-min) (point-max)) (error (pgg-remove-passphrase-from-cache target-cache-id t) (error "decryption failed"))))) (setq result-text (buffer-substring-no-properties 1 (- (point-max) (if decrypt 0 1)))) ) ;; validate result - non-empty (cond ((not result-text) (if verifying nil ;; transform was fruitless, retry w/new passphrase. (pgg-remove-passphrase-from-cache target-cache-id t) (allout-encrypt-string text decrypt allout-buffer key-type for-key nil (if retried (1+ retried) 1) rejected verifying nil))) ;; Retry (within limit) if ciphertext contains rejections: ((and (not decrypt) ;; Check for disqualification of this ciphertext: (let ((regexps reject-ciphertext-regexps) reject-it) (while (and regexps (not reject-it)) (setq reject-it (string-match (car regexps) result-text)) (pop regexps)) reject-it)) (setq rejections-left (1- rejections-left)) (if (<= rejections-left 0) (error (concat "Ciphertext rejected too many times" " (%s), per `%s'") allout-encryption-ciphertext-rejection-ceiling 'allout-encryption-ciphertext-rejection-regexps) (allout-encrypt-string text decrypt allout-buffer key-type for-key nil retried (1+ rejected) verifying passphrase))) ;; Barf if encryption yields extraordinary control chars: ((and (not decrypt) (string-match "[\C-a\C-k\C-o-\C-z\C-@]" result-text)) (error (concat "Encryption produced non-armored text, which" "conflicts with allout mode - reconfigure!"))) ;; valid result and just verifying or non-symmetric: ((or verifying (not (equal key-type 'symmetric))) (if (or verifying decrypt) (pgg-add-passphrase-to-cache target-cache-id passphrase t)) result-text) ;; valid result and regular symmetric - "register" ;; passphrase with mnemonic aids/cache. (t (set-buffer allout-buffer) (if passphrase (pgg-add-passphrase-to-cache target-cache-id passphrase t)) (allout-update-passphrase-mnemonic-aids for-key passphrase allout-buffer) result-text) ) ) ) ) ;;;_ > allout-obtain-passphrase (for-key cache-id prompt-id key-type ;;; allout-buffer retried fetch-pass) (defun allout-obtain-passphrase (for-key cache-id prompt-id key-type allout-buffer retried fetch-pass) "Obtain passphrase for a key from the cache or else from the user. When obtaining from the user, symmetric-cipher passphrases are verified against either, if available and enabled, a random string that was encrypted against the passphrase, or else against repeated entry by the user for corroboration. FOR-KEY is the key for which the passphrase is being obtained. CACHE-ID is the cache id of the key for the passphrase. PROMPT-ID is the id for use when prompting the user. KEY-TYPE is either 'symmetric or 'keypair. ALLOUT-BUFFER is the buffer containing the entry being en/decrypted. RETRIED is the number of this attempt to obtain this passphrase. FETCH-PASS causes the passphrase to be solicited from the user, regardless of the availability of a cached copy." (if (not (equal key-type 'symmetric)) ;; do regular passphrase read on non-symmetric passphrase: (pgg-read-passphrase (format "%s passphrase%s: " (upcase (format "%s" (or pgg-scheme pgg-default-scheme "GPG"))) (if prompt-id (format " for %s" prompt-id) "")) cache-id t) ;; Symmetric hereon: (save-excursion (set-buffer allout-buffer) (let* ((hint (if (and (not (string= allout-passphrase-hint-string "")) (or (equal allout-passphrase-hint-handling 'always) (and (equal allout-passphrase-hint-handling 'needed) retried))) (format " [%s]" allout-passphrase-hint-string) "")) (retry-message (if retried (format " (%s retry)" retried) "")) (prompt-sans-hint (format "'%s' symmetric passphrase%s: " prompt-id retry-message)) (full-prompt (format "'%s' symmetric passphrase%s%s: " prompt-id hint retry-message)) (prompt full-prompt) (verifier-string (allout-get-encryption-passphrase-verifier)) (cached (and (not fetch-pass) (pgg-read-passphrase-from-cache cache-id t))) (got-pass (or cached (pgg-read-passphrase full-prompt cache-id t))) confirmation) (if (not got-pass) nil ;; Duplicate our handle on the passphrase so it's not clobbered by ;; deactivate-passwd memory clearing: (setq got-pass (copy-sequence got-pass)) (cond (verifier-string (save-window-excursion (if (allout-encrypt-string verifier-string 'decrypt allout-buffer 'symmetric for-key nil 0 0 'verifying (copy-sequence got-pass)) (setq confirmation (format "%s" got-pass)))) (if (and (not confirmation) (if (yes-or-no-p (concat "Passphrase differs from established" " - use new one instead? ")) ;; deactivate password for subsequent ;; confirmation: (progn (pgg-remove-passphrase-from-cache cache-id t) (setq prompt prompt-sans-hint) nil) t)) (progn (pgg-remove-passphrase-from-cache cache-id t) (error "Wrong passphrase.")))) ;; No verifier string - force confirmation by repetition of ;; (new) passphrase: ((or fetch-pass (not cached)) (pgg-remove-passphrase-from-cache cache-id t)))) ;; confirmation vs new input - doing pgg-read-passphrase will do the ;; right thing, in either case: (if (not confirmation) (setq confirmation (pgg-read-passphrase (concat prompt " ... confirm spelling: ") cache-id t))) (prog1 (if (equal got-pass confirmation) confirmation (if (yes-or-no-p (concat "spelling of original and" " confirmation differ - retry? ")) (progn (setq retried (if retried (1+ retried) 1)) (pgg-remove-passphrase-from-cache cache-id t) ;; recurse to this routine: (pgg-read-passphrase prompt-sans-hint cache-id t)) (pgg-remove-passphrase-from-cache cache-id t) (error "Confirmation failed.")))))))) ;;;_ > allout-encrypted-topic-p () (defun allout-encrypted-topic-p () "True if the current topic is encryptable and encrypted." (save-excursion (allout-end-of-prefix t) (and (string= (buffer-substring-no-properties (1- (point)) (point)) allout-topic-encryption-bullet) (looking-at "\\*")) ) ) ;;;_ > allout-encrypted-key-info (text) ;; XXX gpg-specific, alas (defun allout-encrypted-key-info (text) "Return a pair of the key type and identity of a recipient's secret key. The key type is one of 'symmetric or 'keypair. if 'keypair, and some of the user's secret keys are among those for which the message was encoded, return the identity of the first. otherwise, return nil for the second item of the pair. An error is raised if the text is not encrypted." (require 'pgg-parse) (save-excursion (with-temp-buffer (insert text) (let* ((parsed-armor (pgg-parse-armor-region (point-min) (point-max))) (type (if (pgg-gpg-symmetric-key-p parsed-armor) 'symmetric 'keypair)) secret-keys first-secret-key for-key-owner) (if (equal type 'keypair) (setq secret-keys (pgg-gpg-lookup-all-secret-keys) first-secret-key (pgg-gpg-select-matching-key parsed-armor secret-keys) for-key-owner (and first-secret-key (pgg-gpg-lookup-key-owner first-secret-key)))) (list type (pgg-gpg-key-id-from-key-owner for-key-owner)) ) ) ) ) ;;;_ > allout-create-encryption-passphrase-verifier (passphrase) (defun allout-create-encryption-passphrase-verifier (passphrase) "Encrypt random message for later validation of symmetric key's passphrase." ;; use 20 random ascii characters, across the entire ascii range. (random t) (let ((spew (make-string 20 ?\0))) (dotimes (i (length spew)) (aset spew i (1+ (random 254)))) (allout-encrypt-string spew nil (current-buffer) 'symmetric nil nil 0 0 passphrase)) ) ;;;_ > allout-update-passphrase-mnemonic-aids (for-key passphrase ;;; outline-buffer) (defun allout-update-passphrase-mnemonic-aids (for-key passphrase outline-buffer) "Update passphrase verifier and hint strings if necessary. See `allout-passphrase-verifier-string' and `allout-passphrase-hint-string' settings. PASSPHRASE is the passphrase being mnemonicized OUTLINE-BUFFER is the buffer of the outline being adjusted. These are used to help the user keep track of the passphrase they use for symmetric encryption in the file. Behavior is governed by `allout-passphrase-verifier-handling', `allout-passphrase-hint-handling', and also, controlling whether the values are preserved on Emacs local file variables, `allout-enable-file-variable-adjustment'." ;; If passphrase doesn't agree with current verifier: ;; - adjust the verifier ;; - if passphrase hint handling is enabled, adjust the passphrase hint ;; - if file var settings are enabled, adjust the file vars (let* ((new-verifier-needed (not (allout-verify-passphrase for-key passphrase outline-buffer))) (new-verifier-string (if new-verifier-needed ;; Collapse to a single line and enclose in string quotes: (subst-char-in-string ?\n ?\C-a (allout-create-encryption-passphrase-verifier passphrase)))) new-hint) (when new-verifier-string ;; do the passphrase hint first, since it's interactive (when (and allout-passphrase-hint-handling (not (equal allout-passphrase-hint-handling 'disabled))) (setq new-hint (read-from-minibuffer "Passphrase hint to jog your memory: " allout-passphrase-hint-string)) (when (not (string= new-hint allout-passphrase-hint-string)) (setq allout-passphrase-hint-string new-hint) (allout-adjust-file-variable "allout-passphrase-hint-string" allout-passphrase-hint-string))) (when allout-passphrase-verifier-handling (setq allout-passphrase-verifier-string new-verifier-string) (allout-adjust-file-variable "allout-passphrase-verifier-string" allout-passphrase-verifier-string)) ) ) ) ;;;_ > allout-get-encryption-passphrase-verifier () (defun allout-get-encryption-passphrase-verifier () "Return text of the encrypt passphrase verifier, unmassaged, or nil if none. Derived from value of `allout-passphrase-verifier-string'." (let ((verifier-string (and (boundp 'allout-passphrase-verifier-string) allout-passphrase-verifier-string))) (if verifier-string ;; Return it uncollapsed (subst-char-in-string ?\C-a ?\n verifier-string)) ) ) ;;;_ > allout-verify-passphrase (key passphrase allout-buffer) (defun allout-verify-passphrase (key passphrase allout-buffer) "True if passphrase successfully decrypts verifier, nil otherwise. \"Otherwise\" includes absence of passphrase verifier." (save-excursion (set-buffer allout-buffer) (and (boundp 'allout-passphrase-verifier-string) allout-passphrase-verifier-string (allout-encrypt-string (allout-get-encryption-passphrase-verifier) 'decrypt allout-buffer 'symmetric key nil 0 0 'verifying passphrase) t))) ;;;_ > allout-next-topic-pending-encryption (&optional except-mark) (defun allout-next-topic-pending-encryption (&optional except-mark) "Return the point of the next topic pending encryption, or nil if none. EXCEPT-MARK identifies a point whose containing topics should be excluded from encryption. This supports 'except-current mode of `allout-encrypt-unencrypted-on-saves'. Such a topic has the allout-topic-encryption-bullet without an immediately following '*' that would mark the topic as being encrypted. It must also have content." (let (done got content-beg) (while (not done) (if (not (re-search-forward (format "\\(\\`\\|\n\\)%s *%s[^*]" (regexp-quote allout-header-prefix) (regexp-quote allout-topic-encryption-bullet)) nil t)) (setq got nil done t) (goto-char (setq got (match-beginning 0))) (if (looking-at "\n") (forward-char 1)) (setq got (point))) (cond ((not got) (setq done t)) ((not (search-forward "\n")) (setq got nil done t)) ((eobp) (setq got nil done t)) (t (setq content-beg (point)) (backward-char 1) (allout-end-of-subtree) (if (or (<= (point) content-beg) (and except-mark (<= content-beg except-mark) (>= (point) except-mark))) ;; Continue looking (setq got nil) ;; Got it! (setq done t))) ) ) (if got (goto-char got)) ) ) ;;;_ > allout-encrypt-decrypted (&optional except-mark) (defun allout-encrypt-decrypted (&optional except-mark) "Encrypt topics pending encryption except those containing exemption point. EXCEPT-MARK identifies a point whose containing topics should be excluded from encryption. This supports 'except-current mode of `allout-encrypt-unencrypted-on-saves'. If a topic that is currently being edited was encrypted, we return a list containing the location of the topic and the location of the cursor just before the topic was encrypted. This can be used, eg, to decrypt the topic and exactly resituate the cursor if this is being done as part of a file save. See `allout-encrypt-unencrypted-on-saves' for more info." (interactive "p") (save-excursion (let* ((current-mark (point-marker)) (current-mark-position (marker-position current-mark)) was-modified bo-subtree editing-topic editing-point) (goto-char (point-min)) (while (allout-next-topic-pending-encryption except-mark) (setq was-modified (buffer-modified-p)) (when (save-excursion (and (boundp 'allout-encrypt-unencrypted-on-saves) allout-encrypt-unencrypted-on-saves (setq bo-subtree (re-search-forward "$")) (not (allout-hidden-p)) (>= current-mark (point)) (allout-end-of-current-subtree) (<= current-mark (point)))) (setq editing-topic (point) ;; we had to wait for this 'til now so prior topics are ;; encrypted, any relevant text shifts are in place: editing-point (- current-mark-position (count-trailing-whitespace-region bo-subtree current-mark-position)))) (allout-toggle-subtree-encryption) (if (not was-modified) (set-buffer-modified-p nil)) ) (if (not was-modified) (set-buffer-modified-p nil)) (if editing-topic (list editing-topic editing-point)) ) ) ) ;;;_ #9 miscellaneous ;;;_ : Mode: ;;;_ > outlineify-sticky () ;; outlinify-sticky is correct spelling; provide this alias for sticklers: ;;;###autoload (defalias 'outlinify-sticky 'outlineify-sticky) ;;;###autoload (defun outlineify-sticky (&optional arg) "Activate outline mode and establish file var so it is started subsequently. See doc-string for `allout-layout' and `allout-init' for details on setup for auto-startup." (interactive "P") (allout-mode t) (save-excursion (goto-char (point-min)) (if (allout-goto-prefix) t (allout-open-topic 2) (insert (concat "Dummy outline topic header - see" "`allout-mode' docstring: `^Hm'.")) (allout-adjust-file-variable "allout-layout" (or allout-layout '(-1 : 0)))))) ;;;_ > allout-file-vars-section-data () (defun allout-file-vars-section-data () "Return data identifying the file-vars section, or nil if none. Returns list `(beginning-point prefix-string suffix-string)'." ;; minimally gleaned from emacs 21.4 files.el hack-local-variables function. (let (beg prefix suffix) (save-excursion (goto-char (point-max)) (search-backward "\n\^L" (max (- (point-max) 3000) (point-min)) 'move) (if (let ((case-fold-search t)) (not (search-forward "Local Variables:" nil t))) nil (setq beg (- (point) 16)) (setq suffix (buffer-substring-no-properties (point) (progn (if (search-forward "\n" nil t) (forward-char -1)) (point)))) (setq prefix (buffer-substring-no-properties (progn (if (search-backward "\n" nil t) (forward-char 1)) (point)) beg)) (list beg prefix suffix)) ) ) ) ;;;_ > allout-adjust-file-variable (varname value) (defun allout-adjust-file-variable (varname value) "Adjust the setting of an Emacs file variable named VARNAME to VALUE. This activity is inhibited if either `enable-local-variables' `allout-enable-file-variable-adjustment' are nil. When enabled, an entry for the variable is created if not already present, or changed if established with a different value. The section for the file variables, itself, is created if not already present. When created, the section lines (including the section line) exist as second-level topics in a top-level topic at the end of the file. `enable-local-variables' must be true for any of this to happen." (if (not (and enable-local-variables allout-enable-file-variable-adjustment)) nil (save-excursion (let ((inhibit-field-text-motion t) (section-data (allout-file-vars-section-data)) beg prefix suffix) (if section-data (setq beg (car section-data) prefix (cadr section-data) suffix (car (cddr section-data))) ;; create the section (goto-char (point-max)) (open-line 1) (allout-open-topic 0) (end-of-line) (insert "Local emacs vars.\n") (allout-open-topic 1) (setq beg (point) suffix "" prefix (buffer-substring-no-properties (progn (beginning-of-line) (point)) beg)) (goto-char beg) (insert "Local variables:\n") (allout-open-topic 0) (insert "End:\n") ) ;; look for existing entry or create one, leaving point for insertion ;; of new value: (goto-char beg) (allout-show-to-offshoot) (if (search-forward (concat "\n" prefix varname ":") nil t) (let* ((value-beg (point)) (line-end (progn (if (search-forward "\n" nil t) (forward-char -1)) (point))) (value-end (- line-end (length suffix)))) (if (> value-end value-beg) (delete-region value-beg value-end))) (end-of-line) (open-line 1) (forward-line 1) (insert (concat prefix varname ":"))) (insert (format " %S%s" value suffix)) ) ) ) ) ;;;_ > allout-get-configvar-values (varname) (defun allout-get-configvar-values (configvar-name) "Return a list of values of the symbols in list bound to CONFIGVAR-NAME. The user is prompted for removal of symbols that are unbound, and they otherwise are ignored. CONFIGVAR-NAME should be the name of the configuration variable, not its value." (let ((configvar-value (symbol-value configvar-name)) got) (dolist (sym configvar-value) (if (not (boundp sym)) (if (yes-or-no-p (format "%s entry `%s' is unbound - remove it? " configvar-name sym)) (delq sym (symbol-value configvar-name))) (push (symbol-value sym) got))) (reverse got))) ;;;_ : Topics: ;;;_ > allout-mark-topic () (defun allout-mark-topic () "Put the region around topic currently containing point." (interactive) (let ((inhibit-field-text-motion t)) (beginning-of-line)) (allout-goto-prefix-doublechecked) (push-mark (point)) (allout-end-of-current-subtree) (exchange-point-and-mark)) ;;;_ : UI: ;;;_ > solicit-char-in-string (prompt string &optional do-defaulting) (defun solicit-char-in-string (prompt string &optional do-defaulting) "Solicit (with first arg PROMPT) choice of a character from string STRING. Optional arg DO-DEFAULTING indicates to accept empty input (CR)." (let ((new-prompt prompt) got) (while (not got) (message "%s" new-prompt) ;; We do our own reading here, so we can circumvent, eg, special ;; treatment for `?' character. (Oughta use minibuffer keymap instead.) (setq got (char-to-string (let ((cursor-in-echo-area nil)) (read-char)))) (setq got (cond ((string-match (regexp-quote got) string) got) ((and do-defaulting (string= got "\r")) ;; Return empty string to default: "") ((string= got "\C-g") (signal 'quit nil)) (t (setq new-prompt (concat prompt got " ...pick from: " string "")) nil)))) ;; got something out of loop - return it: got) ) ;;;_ : Strings: ;;;_ > regexp-sans-escapes (string) (defun regexp-sans-escapes (regexp &optional successive-backslashes) "Return a copy of REGEXP with all character escapes stripped out. Representations of actual backslashes - '\\\\\\\\' - are left as a single backslash. Optional arg SUCCESSIVE-BACKSLASHES is used internally for recursion." (if (string= regexp "") "" ;; Set successive-backslashes to number if current char is ;; backslash, or else to nil: (setq successive-backslashes (if (= (aref regexp 0) ?\\) (if successive-backslashes (1+ successive-backslashes) 1) nil)) (if (or (not successive-backslashes) (= 2 successive-backslashes)) ;; Include first char: (concat (substring regexp 0 1) (regexp-sans-escapes (substring regexp 1))) ;; Exclude first char, but maintain count: (regexp-sans-escapes (substring regexp 1) successive-backslashes)))) ;;;_ > count-trailing-whitespace-region (beg end) (defun count-trailing-whitespace-region (beg end) "Return number of trailing whitespace chars between BEG and END. If BEG is bigger than END we return 0." (if (> beg end) 0 (save-excursion (goto-char beg) (let ((count 0)) (while (re-search-forward "[ ][ ]*$" end t) (goto-char (1+ (match-beginning 2))) (setq count (1+ count))) count)))) ;;;_ > allout-format-quote (string) (defun allout-format-quote (string) "Return a copy of string with all \"%\" characters doubled." (apply 'concat (mapcar (lambda (char) (if (= char ?%) "%%" (char-to-string char))) string))) ;;;_ : lists ;;;_ > allout-flatten (list) (defun allout-flatten (list) "Return a list of all atoms in list." ;; classic. (cond ((null list) nil) ((atom (car list)) (cons (car list) (allout-flatten (cdr list)))) (t (append (allout-flatten (car list)) (allout-flatten (cdr list)))))) ;;;_ : Compatability: ;;;_ > allout-mark-marker to accommodate divergent emacsen: (defun allout-mark-marker (&optional force buffer) "Accommodate the different signature for `mark-marker' across Emacsen. XEmacs takes two optional args, while mainline GNU Emacs does not, so pass them along when appropriate." (if (featurep 'xemacs) (apply 'mark-marker force buffer) (mark-marker))) ;;;_ > subst-char-in-string if necessary (if (not (fboundp 'subst-char-in-string)) (defun subst-char-in-string (fromchar tochar string &optional inplace) "Replace FROMCHAR with TOCHAR in STRING each time it occurs. Unless optional argument INPLACE is non-nil, return a new string." (let ((i (length string)) (newstr (if inplace string (copy-sequence string)))) (while (> i 0) (setq i (1- i)) (if (eq (aref newstr i) fromchar) (aset newstr i tochar))) newstr))) ;;;_ > wholenump if necessary (if (not (fboundp 'wholenump)) (defalias 'wholenump 'natnump)) ;;;_ > remove-overlays if necessary (if (not (fboundp 'remove-overlays)) (defun remove-overlays (&optional beg end name val) "Clear BEG and END of overlays whose property NAME has value VAL. Overlays might be moved and/or split. BEG and END default respectively to the beginning and end of buffer." (unless beg (setq beg (point-min))) (unless end (setq end (point-max))) (if (< end beg) (setq beg (prog1 end (setq end beg)))) (save-excursion (dolist (o (overlays-in beg end)) (when (eq (overlay-get o name) val) ;; Either push this overlay outside beg...end ;; or split it to exclude beg...end ;; or delete it entirely (if it is contained in beg...end). (if (< (overlay-start o) beg) (if (> (overlay-end o) end) (progn (move-overlay (copy-overlay o) (overlay-start o) beg) (move-overlay o end (overlay-end o))) (move-overlay o (overlay-start o) beg)) (if (> (overlay-end o) end) (move-overlay o end (overlay-end o)) (delete-overlay o))))))) ) ;;;_ > copy-overlay if necessary - xemacs ~ 21.4 (if (not (fboundp 'copy-overlay)) (defun copy-overlay (o) "Return a copy of overlay O." (let ((o1 (make-overlay (overlay-start o) (overlay-end o) ;; FIXME: there's no easy way to find the ;; insertion-type of the two markers. (overlay-buffer o))) (props (overlay-properties o))) (while props (overlay-put o1 (pop props) (pop props))) o1))) ;;;_ > add-to-invisibility-spec if necessary - xemacs ~ 21.4 (if (not (fboundp 'add-to-invisibility-spec)) (defun add-to-invisibility-spec (element) "Add ELEMENT to `buffer-invisibility-spec'. See documentation for `buffer-invisibility-spec' for the kind of elements that can be added." (if (eq buffer-invisibility-spec t) (setq buffer-invisibility-spec (list t))) (setq buffer-invisibility-spec (cons element buffer-invisibility-spec)))) ;;;_ > remove-from-invisibility-spec if necessary - xemacs ~ 21.4 (if (not (fboundp 'remove-from-invisibility-spec)) (defun remove-from-invisibility-spec (element) "Remove ELEMENT from `buffer-invisibility-spec'." (if (consp buffer-invisibility-spec) (setq buffer-invisibility-spec (delete element buffer-invisibility-spec))))) ;;;_ > move-beginning-of-line if necessary - older emacs, xemacs (if (not (fboundp 'move-beginning-of-line)) (defun move-beginning-of-line (arg) "Move point to beginning of current line as displayed. \(This disregards invisible newlines such as those which are part of the text that an image rests on.) With argument ARG not nil or 1, move forward ARG - 1 lines first. If point reaches the beginning or end of buffer, it stops there. To ignore intangibility, bind `inhibit-point-motion-hooks' to t." (interactive "p") (or arg (setq arg 1)) (if (/= arg 1) (condition-case nil (line-move (1- arg)) (error nil))) ;; Move to beginning-of-line, ignoring fields and invisibles. (skip-chars-backward "^\n") (while (and (not (bobp)) (line-move-invisible-p (1- (point)))) (goto-char (if (featurep 'xemacs) (previous-property-change (point)) (previous-char-property-change (point)))) (skip-chars-backward "^\n")) (vertical-motion 0)) ) ;;;_ > move-end-of-line if necessary - older emacs, xemacs (if (not (fboundp 'move-end-of-line)) (defun move-end-of-line (arg) "Move point to end of current line as displayed. \(This disregards invisible newlines such as those which are part of the text that an image rests on.) With argument ARG not nil or 1, move forward ARG - 1 lines first. If point reaches the beginning or end of buffer, it stops there. To ignore intangibility, bind `inhibit-point-motion-hooks' to t." (interactive "p") (or arg (setq arg 1)) (let (done) (while (not done) (let ((newpos (save-excursion (let ((goal-column 0)) (and (condition-case nil (or (line-move arg) t) (error nil)) (not (bobp)) (progn (while (and (not (bobp)) (line-move-invisible-p (1- (point)))) (goto-char (previous-char-property-change (point)))) (backward-char 1))) (point))))) (goto-char newpos) (if (and (> (point) newpos) (eq (preceding-char) ?\n)) (backward-char 1) (if (and (> (point) newpos) (not (eobp)) (not (eq (following-char) ?\n))) ;; If we skipped something intangible ;; and now we're not really at eol, ;; keep going. (setq arg 1) (setq done t))))))) ) ;;;_ > line-move-invisible-p if necessary (if (not (fboundp 'line-move-invisible-p)) (defun line-move-invisible-p (pos) "Return non-nil if the character after POS is currently invisible." (let ((prop (get-char-property pos 'invisible))) (if (eq buffer-invisibility-spec t) prop (or (memq prop buffer-invisibility-spec) (assq prop buffer-invisibility-spec)))))) ;;;_ #10 Unfinished ;;;_ > allout-bullet-isearch (&optional bullet) (defun allout-bullet-isearch (&optional bullet) "Isearch (regexp) for topic with bullet BULLET." (interactive) (if (not bullet) (setq bullet (solicit-char-in-string "ISearch for topic with bullet: " (regexp-sans-escapes allout-bullets-string)))) (let ((isearch-regexp t) (isearch-string (concat "^" allout-header-prefix "[ \t]*" bullet))) (isearch-repeat 'forward) (isearch-mode t))) ;;;_ #11 Unit tests - this should be last item before "Provide" ;;;_ > allout-run-unit-tests () (defun allout-run-unit-tests () "Run the various allout unit tests." (message "Running allout tests...") (allout-test-resumptions) (message "Running allout tests... Done.") (sit-for .5)) ;;;_ : test resumptions: ;;;_ > allout-tests-obliterate-variable (name) (defun allout-tests-obliterate-variable (name) "Completely unbind variable with NAME." (if (local-variable-p name) (kill-local-variable name)) (while (boundp name) (makunbound name))) ;;;_ > allout-test-resumptions () (defvar allout-tests-globally-unbound nil "Fodder for allout resumptions tests - defvar just for byte compiler.") (defvar allout-tests-globally-true nil "Fodder for allout resumptions tests - defvar just just for byte compiler.") (defvar allout-tests-locally-true nil "Fodder for allout resumptions tests - defvar just for byte compiler.") (defun allout-test-resumptions () "Exercise allout resumptions." ;; for each resumption case, we also test that the right local/global ;; scopes are affected during resumption effects: ;; ensure that previously unbound variables return to the unbound state. (with-temp-buffer (allout-tests-obliterate-variable 'allout-tests-globally-unbound) (allout-add-resumptions '(allout-tests-globally-unbound t)) (assert (not (default-boundp 'allout-tests-globally-unbound))) (assert (local-variable-p 'allout-tests-globally-unbound)) (assert (boundp 'allout-tests-globally-unbound)) (assert (equal allout-tests-globally-unbound t)) (allout-do-resumptions) (assert (not (local-variable-p 'allout-tests-globally-unbound))) (assert (not (boundp 'allout-tests-globally-unbound)))) ;; ensure that variable with prior global value is resumed (with-temp-buffer (allout-tests-obliterate-variable 'allout-tests-globally-true) (setq allout-tests-globally-true t) (allout-add-resumptions '(allout-tests-globally-true nil)) (assert (equal (default-value 'allout-tests-globally-true) t)) (assert (local-variable-p 'allout-tests-globally-true)) (assert (equal allout-tests-globally-true nil)) (allout-do-resumptions) (assert (not (local-variable-p 'allout-tests-globally-true))) (assert (boundp 'allout-tests-globally-true)) (assert (equal allout-tests-globally-true t))) ;; ensure that prior local value is resumed (with-temp-buffer (allout-tests-obliterate-variable 'allout-tests-locally-true) (set (make-local-variable 'allout-tests-locally-true) t) (assert (not (default-boundp 'allout-tests-locally-true)) nil (concat "Test setup mistake - variable supposed to" " not have global binding, but it does.")) (assert (local-variable-p 'allout-tests-locally-true) nil (concat "Test setup mistake - variable supposed to have" " local binding, but it lacks one.")) (allout-add-resumptions '(allout-tests-locally-true nil)) (assert (not (default-boundp 'allout-tests-locally-true))) (assert (local-variable-p 'allout-tests-locally-true)) (assert (equal allout-tests-locally-true nil)) (allout-do-resumptions) (assert (boundp 'allout-tests-locally-true)) (assert (local-variable-p 'allout-tests-locally-true)) (assert (equal allout-tests-locally-true t)) (assert (not (default-boundp 'allout-tests-locally-true)))) ;; ensure that last of multiple resumptions holds, for various scopes. (with-temp-buffer (allout-tests-obliterate-variable 'allout-tests-globally-unbound) (allout-tests-obliterate-variable 'allout-tests-globally-true) (setq allout-tests-globally-true t) (allout-tests-obliterate-variable 'allout-tests-locally-true) (set (make-local-variable 'allout-tests-locally-true) t) (allout-add-resumptions '(allout-tests-globally-unbound t) '(allout-tests-globally-true nil) '(allout-tests-locally-true nil)) (allout-add-resumptions '(allout-tests-globally-unbound 2) '(allout-tests-globally-true 3) '(allout-tests-locally-true 4)) ;; reestablish many of the basic conditions are maintained after re-add: (assert (not (default-boundp 'allout-tests-globally-unbound))) (assert (local-variable-p 'allout-tests-globally-unbound)) (assert (equal allout-tests-globally-unbound 2)) (assert (default-boundp 'allout-tests-globally-true)) (assert (local-variable-p 'allout-tests-globally-true)) (assert (equal allout-tests-globally-true 3)) (assert (not (default-boundp 'allout-tests-locally-true))) (assert (local-variable-p 'allout-tests-locally-true)) (assert (equal allout-tests-locally-true 4)) (allout-do-resumptions) (assert (not (local-variable-p 'allout-tests-globally-unbound))) (assert (not (boundp 'allout-tests-globally-unbound))) (assert (not (local-variable-p 'allout-tests-globally-true))) (assert (boundp 'allout-tests-globally-true)) (assert (equal allout-tests-globally-true t)) (assert (boundp 'allout-tests-locally-true)) (assert (local-variable-p 'allout-tests-locally-true)) (assert (equal allout-tests-locally-true t)) (assert (not (default-boundp 'allout-tests-locally-true)))) ;; ensure that deliberately unbinding registered variables doesn't foul things (with-temp-buffer (allout-tests-obliterate-variable 'allout-tests-globally-unbound) (allout-tests-obliterate-variable 'allout-tests-globally-true) (setq allout-tests-globally-true t) (allout-tests-obliterate-variable 'allout-tests-locally-true) (set (make-local-variable 'allout-tests-locally-true) t) (allout-add-resumptions '(allout-tests-globally-unbound t) '(allout-tests-globally-true nil) '(allout-tests-locally-true nil)) (allout-tests-obliterate-variable 'allout-tests-globally-unbound) (allout-tests-obliterate-variable 'allout-tests-globally-true) (allout-tests-obliterate-variable 'allout-tests-locally-true) (allout-do-resumptions)) ) ;;;_ % Run unit tests if `allout-run-unit-tests-after-load' is true: (when allout-run-unit-tests-on-load (allout-run-unit-tests)) ;;;_ #12 Provide (provide 'allout) ;;;_* Local emacs vars. ;; The following `allout-layout' local variable setting: ;; - closes all topics from the first topic to just before the third-to-last, ;; - shows the children of the third to last (config vars) ;; - and the second to last (code section), ;; - and closes the last topic (this local-variables section). ;;Local variables: ;;allout-layout: (0 : -1 -1 0) ;;End: ;; arch-tag: cf38fbc3-c044-450f-8bff-afed8ba5681c ;;; allout.el ends here