(eval-when-compile (require 'cl))
(require 'url-parse)
(autoload 'url-do-setup "url")
(defgroup url-history nil
"History variables in the URL package."
:prefix "url-history"
:group 'url)
(defcustom url-history-track nil
"*Controls whether to keep a list of all the URLs being visited.
If non-nil, the URL package will keep track of all the URLs visited.
If set to t, then the list is saved to disk at the end of each Emacs
session."
:set #'(lambda (var val)
(set-default var val)
(and (bound-and-true-p url-setup-done)
(url-history-setup-save-timer)))
:type '(choice (const :tag "off" nil)
(const :tag "on" t)
(const :tag "within session" 'session))
:group 'url-history)
(defcustom url-history-file nil
"*The global history file for the URL package.
This file contains a list of all the URLs you have visited. This file
is parsed at startup and used to provide URL completion."
:type '(choice (const :tag "Default" :value nil) file)
:group 'url-history)
(defcustom url-history-save-interval 3600
"*The number of seconds between automatic saves of the history list.
Default is 1 hour. Note that if you change this variable outside of
the `customize' interface after `url-do-setup' has been run, you need
to run the `url-history-setup-save-timer' function manually."
:set #'(lambda (var val)
(set-default var val)
(if (bound-and-true-p url-setup-done)
(url-history-setup-save-timer)))
:type 'integer
:group 'url-history)
(defvar url-history-timer nil)
(defvar url-history-changed-since-last-save nil
"Whether the history list has changed since the last save operation.")
(defvar url-history-hash-table (make-hash-table :size 31 :test 'equal)
"Hash table for global history completion.")
(defun url-history-setup-save-timer ()
"Reset the history list timer."
(interactive)
(ignore-errors
(cancel-timer url-history-timer))
(setq url-history-timer nil)
(if (and (eq url-history-track t) url-history-save-interval)
(setq url-history-timer (run-at-time url-history-save-interval
url-history-save-interval
'url-history-save-history))))
(defun url-history-parse-history (&optional fname)
"Parse a history file stored in FNAME."
(or fname (setq fname (expand-file-name url-history-file)))
(cond
((not (file-exists-p fname))
)
((not (file-readable-p fname))
(message "%s is unreadable." fname))
(t
(condition-case nil
(load fname nil t)
(error (message "Could not load %s" fname))))))
(defun url-history-update-url (url time)
(setq url-history-changed-since-last-save t)
(puthash (if (vectorp url) (url-recreate-url url) url) time
url-history-hash-table))
(defun url-history-save-history (&optional fname)
"Write the global history file into `url-history-file'.
The type of data written is determined by what is in the file to begin
with. If the type of storage cannot be determined, then prompt the
user for what type to save as."
(interactive)
(or fname (setq fname (expand-file-name url-history-file)))
(unless (file-directory-p (file-name-directory fname))
(ignore-errors (make-directory (file-name-directory fname))))
(cond
((not url-history-changed-since-last-save) nil)
((not (file-writable-p fname))
(message "%s is unwritable." fname))
(t
(let ((make-backup-files nil)
(version-control nil)
(require-final-newline t))
(with-current-buffer (get-buffer-create " *url-tmp*")
(erase-buffer)
(let ((count 0))
(maphash (lambda (key value)
(while (string-match "[\r\n]+" key)
(setq key (concat (substring key 0 (match-beginning 0))
(substring key (match-end 0) nil))))
(setq count (1+ count))
(insert "(puthash \"" key "\""
(if (not (stringp value)) " '" "")
(prin1-to-string value)
" url-history-hash-table)\n"))
url-history-hash-table)
(insert "\n")
(write-file fname))
(kill-buffer (current-buffer))))))
(setq url-history-changed-since-last-save nil))
(defun url-have-visited-url (url)
(url-do-setup)
(gethash url url-history-hash-table nil))
(defun url-completion-function (string predicate function)
(url-do-setup)
(cond
((eq function nil)
(let ((list nil))
(maphash (lambda (key val) (push key list))
url-history-hash-table)
(try-completion string (nreverse list) predicate)))
((eq function t)
(let ((stub (concat "\\`" (regexp-quote string)))
(retval nil))
(maphash
(lambda (url time)
(if (string-match stub url) (push url retval)))
url-history-hash-table)
retval))
((eq function 'lambda)
(and (gethash string url-history-hash-table) t))
(t
(error "url-completion-function very confused"))))
(provide 'url-history)