(defvar comint-last-output-start)
(defgroup ansi-colors nil
"Translating SGR control sequences to faces.
This translation effectively colorizes strings and regions based upon
SGR control sequences embedded in the text. SGR (Select Graphic
Rendition) control sequences are defined in section 3.8.117 of the
ECMA-48 standard \(identical to ISO/IEC 6429), which is freely available
as a PDF file <URL:http://www.ecma.ch/ecma1/STAND/ECMA-048.HTM>."
:version "21.1"
:group 'processes)
(defcustom ansi-color-faces-vector
[default bold default italic underline bold bold-italic modeline]
"Faces used for SGR control sequences determining a face.
This vector holds the faces used for SGR control sequence parameters 0
to 7.
Parameter Description Face used by default
0 default default
1 bold bold
2 faint default
3 italic italic
4 underlined underline
5 slowly blinking bold
6 rapidly blinking bold-italic
7 negative image modeline
Note that the symbol `default' is special: It will not be combined
with the current face.
This vector is used by `ansi-color-make-color-map' to create a color
map. This color map is stored in the variable `ansi-color-map'."
:type '(vector face face face face face face face face)
:set 'ansi-color-map-update
:initialize 'custom-initialize-default
:group 'ansi-colors)
(defcustom ansi-color-names-vector
["black" "red" "green" "yellow" "blue" "magenta" "cyan" "white"]
"Colors used for SGR control sequences determining a color.
This vector holds the colors used for SGR control sequences parameters
30 to 37 \(foreground colors) and 40 to 47 (background colors).
Parameter Color
30 40 black
31 41 red
32 42 green
33 43 yellow
34 44 blue
35 45 magenta
36 46 cyan
37 47 white
This vector is used by `ansi-color-make-color-map' to create a color
map. This color map is stored in the variable `ansi-color-map'."
:type '(vector string string string string string string string string)
:set 'ansi-color-map-update
:initialize 'custom-initialize-default
:group 'ansi-colors)
(defconst ansi-color-regexp "\033\\[\\([0-9;]*\\)m"
"Regexp that matches SGR control sequences.")
(defconst ansi-color-parameter-regexp "\\([0-9]*\\)[m;]"
"Regexp that matches SGR control sequence parameters.")
(defcustom ansi-color-for-comint-mode nil
"Determines what to do with comint output.
If nil, do nothing.
If the symbol `filter', then filter all SGR control sequences.
If anything else (such as t), then translate SGR control sequences
into text-properties.
In order for this to have any effect, `ansi-color-process-output' must
be in `comint-output-filter-functions'.
This can be used to enable colorized ls --color=yes output
in shell buffers. You set this variable by calling one of:
\\[ansi-color-for-comint-mode-on]
\\[ansi-color-for-comint-mode-off]
\\[ansi-color-for-comint-mode-filter]"
:type '(choice (const :tag "Do nothing" nil)
(const :tag "Filter" filter)
(const :tag "Translate" t))
:group 'ansi-colors)
(defun ansi-color-for-comint-mode-on ()
"Set `ansi-color-for-comint-mode' to t."
(interactive)
(setq ansi-color-for-comint-mode t))
(defun ansi-color-for-comint-mode-off ()
"Set `ansi-color-for-comint-mode' to nil."
(interactive)
(setq ansi-color-for-comint-mode nil))
(defun ansi-color-for-comint-mode-filter ()
"Set `ansi-color-for-comint-mode' to symbol `filter'."
(interactive)
(setq ansi-color-for-comint-mode 'filter))
(defun ansi-color-process-output (string)
"Maybe translate SGR control sequences of comint output into text-properties.
Depending on variable `ansi-color-for-comint-mode' the comint output is
either not processed, SGR control sequences are filtered using
`ansi-color-filter-region', or SGR control sequences are translated into
text-properties using `ansi-color-apply-on-region'.
The comint output is assumed to lie between the marker
`comint-last-output-start' and the process-mark.
This is a good function to put in `comint-output-filter-functions'."
(let ((start-marker (or comint-last-output-start
(point-min-marker)))
(end-marker (process-mark (get-buffer-process (current-buffer)))))
(cond ((eq ansi-color-for-comint-mode nil))
((eq ansi-color-for-comint-mode 'filter)
(ansi-color-filter-region start-marker end-marker))
(t
(ansi-color-apply-on-region start-marker end-marker)))))
(add-hook 'comint-output-filter-functions
'ansi-color-process-output)
(defun ansi-color-unfontify-region (beg end &rest xemacs-stuff)
"Replacement function for `font-lock-default-unfontify-region'.
As text-properties are implemented using extents in XEmacs, this
function is probably not needed. In Emacs, however, things are a bit
different: When font-lock is active in a buffer, you cannot simply add
face text-properties to the buffer. Font-lock will remove the face
text-property using `font-lock-unfontify-region-function'. If you want
to insert the strings returned by `ansi-color-apply' into such buffers,
you must set `font-lock-unfontify-region-function' to
`ansi-color-unfontify-region'. This function will not remove all face
text-properties unconditionally. It will keep the face text-properties
if the property `ansi-color' is set.
The region from BEG to END is unfontified. XEMACS-STUFF is ignored.
A possible way to install this would be:
\(add-hook 'font-lock-mode-hook
\(function (lambda ()
\(setq font-lock-unfontify-region-function
'ansi-color-unfontify-region))))"
(when (boundp 'font-lock-syntactic-keywords)
(remove-text-properties beg end '(syntax-table nil)))
(while (setq beg (text-property-not-all beg end 'face nil))
(setq beg (or (text-property-not-all beg end 'ansi-color t) end))
(when (get-text-property beg 'face)
(let ((end-face (or (text-property-any beg end 'face nil)
end)))
(remove-text-properties beg end-face '(face nil))
(setq beg end-face)))))
(defvar ansi-color-context nil
"Context saved between two calls to `ansi-color-apply'.
This is a list of the form (FACES FRAGMENT) or nil. FACES is a list of
faces the last call to `ansi-color-apply' ended with, and FRAGMENT is a
string starting with an escape sequence, possibly the start of a new
escape sequence.")
(make-variable-buffer-local 'ansi-color-context)
(defun ansi-color-filter-apply (string)
"Filter out all SGR control sequences from STRING.
Every call to this function will set and use the buffer-local variable
`ansi-color-context' to save partial escape sequences. This information
will be used for the next call to `ansi-color-apply'. Set
`ansi-color-context' to nil if you don't want this.
This function can be added to `comint-preoutput-filter-functions'."
(let ((start 0) end result)
(if (cadr ansi-color-context)
(setq string (concat (cadr ansi-color-context) string)
ansi-color-context nil))
(while (setq end (string-match ansi-color-regexp string start))
(setq result (concat result (substring string start end))
start (match-end 0)))
(let (fragment)
(if (string-match "\033" string start)
(let ((pos (match-beginning 0)))
(setq fragment (substring string pos)
result (concat result (substring string start pos))))
(setq result (concat result (substring string start))))
(if fragment
(setq ansi-color-context (list nil fragment))
(setq ansi-color-context nil)))
result))
(defun ansi-color-apply (string)
"Translates SGR control sequences into text-properties.
Applies SGR control sequences setting foreground and background colors
to STRING using text-properties and returns the result. The colors used
are given in `ansi-color-faces-vector' and `ansi-color-names-vector'.
See function `ansi-color-apply-sequence' for details.
Every call to this function will set and use the buffer-local variable
`ansi-color-context' to save partial escape sequences and current face.
This information will be used for the next call to `ansi-color-apply'.
Set `ansi-color-context' to nil if you don't want this.
This function can be added to `comint-preoutput-filter-functions'.
You cannot insert the strings returned into buffers using font-lock.
See `ansi-color-unfontify-region' for a way around this."
(let ((face (car ansi-color-context))
(start 0) end escape-sequence result)
(if (cadr ansi-color-context)
(setq string (concat (cadr ansi-color-context) string)
ansi-color-context nil))
(while (setq end (string-match ansi-color-regexp string start))
(setq escape-sequence (match-string 1 string))
(when face
(put-text-property start end 'ansi-color t string)
(put-text-property start end 'face face string))
(setq result (concat result (substring string start end))
start (match-end 0))
(setq face (ansi-color-apply-sequence escape-sequence face)))
(when face
(put-text-property start (length string) 'ansi-color t string)
(put-text-property start (length string) 'face face string))
(let (fragment)
(if (string-match "\033" string start)
(let ((pos (match-beginning 0)))
(setq fragment (substring string pos)
result (concat result (substring string start pos))))
(setq result (concat result (substring string start))))
(if (or face fragment)
(setq ansi-color-context (list face fragment))
(setq ansi-color-context nil)))
result))
(defvar ansi-color-context-region nil
"Context saved between two calls to `ansi-color-apply-on-region'.
This is a list of the form (FACES MARKER) or nil. FACES is a list of
faces the last call to `ansi-color-apply-on-region' ended with, and
MARKER is a buffer position within an escape sequence or the last
position processed.")
(make-variable-buffer-local 'ansi-color-context-region)
(defun ansi-color-filter-region (begin end)
"Filter out all SGR control sequences from region BEGIN to END.
Every call to this function will set and use the buffer-local variable
`ansi-color-context-region' to save position. This information will be
used for the next call to `ansi-color-apply-on-region'. Specifically,
it will override BEGIN, the start of the region. Set
`ansi-color-context-region' to nil if you don't want this."
(let ((end-marker (copy-marker end))
(start (or (cadr ansi-color-context-region) begin)))
(save-excursion
(goto-char start)
(while (re-search-forward ansi-color-regexp end-marker t)
(replace-match ""))
(if (re-search-forward "\033" end-marker t)
(setq ansi-color-context-region (list nil (match-beginning 0)))
(setq ansi-color-context-region nil)))))
(defun ansi-color-apply-on-region (begin end)
"Translates SGR control sequences into overlays or extents.
Applies SGR control sequences setting foreground and background colors
to text in region between BEGIN and END using extents or overlays.
Emacs will use overlays, XEmacs will use extents. The colors used are
given in `ansi-color-faces-vector' and `ansi-color-names-vector'. See
function `ansi-color-apply-sequence' for details.
Every call to this function will set and use the buffer-local variable
`ansi-color-context-region' to save position and current face. This
information will be used for the next call to
`ansi-color-apply-on-region'. Specifically, it will override BEGIN, the
start of the region and set the face with which to start. Set
`ansi-color-context-region' to nil if you don't want this."
(let ((face (car ansi-color-context-region))
(start-marker (or (cadr ansi-color-context-region)
(copy-marker begin)))
(end-marker (copy-marker end))
escape-sequence)
(save-excursion
(goto-char start-marker)
(while (re-search-forward ansi-color-regexp end-marker t)
(when face
(ansi-color-set-extent-face
(ansi-color-make-extent start-marker (match-beginning 0))
face))
(setq escape-sequence (match-string 1)
start-marker (copy-marker (match-end 0)))
(replace-match "")
(setq face (ansi-color-apply-sequence escape-sequence face)))
(if (re-search-forward "\033" end-marker t)
(progn
(when face
(ansi-color-set-extent-face
(ansi-color-make-extent start-marker (point))
face))
(setq ansi-color-context-region
(list face (copy-marker (match-beginning 0)))))
(if face
(progn
(ansi-color-set-extent-face
(ansi-color-make-extent start-marker end-marker)
face)
(setq ansi-color-context-region (list face)))
(setq ansi-color-context-region nil))))))
(defun ansi-color-make-face (property color)
"Return a face with PROPERTY set to COLOR.
PROPERTY can be either symbol `foreground' or symbol `background'.
For Emacs, we just return the cons cell \(PROPERTY . COLOR).
For XEmacs, we create a temporary face and return it."
(if (featurep 'xemacs)
(let ((face (make-face (intern (concat color "-" (symbol-name property)))
"Temporary face created by ansi-color."
t)))
(set-face-property face property color)
face)
(cond ((eq property 'foreground)
(cons 'foreground-color color))
((eq property 'background)
(cons 'background-color color))
(t
(cons property color)))))
(defun ansi-color-make-extent (from to &optional object)
"Make an extent for the range [FROM, TO) in OBJECT.
OBJECT defaults to the current buffer. XEmacs uses `make-extent', Emacs
uses `make-overlay'. XEmacs can use a buffer or a string for OBJECT,
Emacs requires OBJECT to be a buffer."
(if (fboundp 'make-extent)
(make-extent from to object)
(let ((overlay (make-overlay from to object)))
(overlay-put overlay 'modification-hooks '(ansi-color-freeze-overlay))
overlay)))
(defun ansi-color-freeze-overlay (overlay is-after begin end &optional len)
"Prevent OVERLAY from being extended.
This function can be used for the `modification-hooks' overlay
property."
(when (and is-after
(= 0 len)
(= end (overlay-end overlay)))
(move-overlay overlay (overlay-start overlay) begin)))
(defun ansi-color-set-extent-face (extent face)
"Set the `face' property of EXTENT to FACE.
XEmacs uses `set-extent-face', Emacs uses `overlay-put'."
(if (fboundp 'set-extent-face)
(set-extent-face extent face)
(overlay-put extent 'face face)))
(defun ansi-color-apply-sequence (escape-sequence faces)
"Apply ESCAPE-SEQ to FACES and return the new list of faces.
ESCAPE-SEQ is an escape sequences parsed by `ansi-color-get-face'.
If the new faces start with the symbol `default', then the new
faces are returned. If the faces start with something else,
they are appended to the front of the FACES list, and the new
list of faces is returned.
If `ansi-color-get-face' returns nil, then we either got a
null-sequence, or we stumbled upon some garbage. In either
case we return nil."
(let ((new-faces (ansi-color-get-face escape-sequence)))
(cond ((null new-faces)
nil)
((eq (car new-faces) 'default)
(cdr new-faces))
(t
(let ((modified-faces (copy-sequence faces)))
(dolist (face (nreverse new-faces))
(setq modified-faces (delete face modified-faces))
(push face modified-faces))
modified-faces)))))
(defun ansi-color-make-color-map ()
"Creates a vector of face definitions and returns it.
The index into the vector is an ANSI code. See the documentation of
`ansi-color-map' for an example.
The face definitions are based upon the variables
`ansi-color-faces-vector' and `ansi-color-names-vector'."
(let ((ansi-color-map (make-vector 50 nil))
(index 0))
(mapcar
(function (lambda (e)
(aset ansi-color-map index e)
(setq index (1+ index)) ))
ansi-color-faces-vector)
(setq index 30)
(mapcar
(function (lambda (e)
(aset ansi-color-map index
(ansi-color-make-face 'foreground e))
(setq index (1+ index)) ))
ansi-color-names-vector)
(setq index 40)
(mapcar
(function (lambda (e)
(aset ansi-color-map index
(ansi-color-make-face 'background e))
(setq index (1+ index)) ))
ansi-color-names-vector)
ansi-color-map))
(defvar ansi-color-map (ansi-color-make-color-map)
"A brand new color map suitable for `ansi-color-get-face'.
The value of this variable is usually constructed by
`ansi-color-make-color-map'. The values in the array are such that the
numbers included in an SGR control sequences point to the correct
foreground or background colors.
Example: The sequence \033[34m specifies a blue foreground. Therefore:
(aref ansi-color-map 34)
=> \(foreground-color . \"blue\")")
(defun ansi-color-map-update (symbol value)
"Update `ansi-color-map'.
Whenever the vectors used to construct `ansi-color-map' are changed,
this function is called. Therefore this function is listed as the :set
property of `ansi-color-faces-vector' and `ansi-color-names-vector'."
(set-default symbol value)
(setq ansi-color-map (ansi-color-make-color-map)))
(defun ansi-color-get-face-1 (ansi-code)
"Get face definition from `ansi-color-map'.
ANSI-CODE is used as an index into the vector."
(condition-case nil
(aref ansi-color-map ansi-code)
('args-out-of-range nil)))
(defun ansi-color-get-face (escape-seq)
"Create a new face by applying all the parameters in ESCAPE-SEQ.
Should any of the parameters result in the default face (usually this is
the parameter 0), then the effect of all previous parameters is cancelled.
ESCAPE-SEQ is a SGR control sequences such as \\033[34m. The parameter
34 is used by `ansi-color-get-face-1' to return a face definition."
(let ((ansi-color-r "[0-9][0-9]?")
(i 0)
f val)
(while (string-match ansi-color-r escape-seq i)
(setq i (match-end 0)
val (ansi-color-get-face-1
(string-to-number (match-string 0 escape-seq) 10)))
(cond ((not val))
((eq val 'default)
(setq f (list val)))
(t
(unless (member val f)
(push val f)))))
f))
(provide 'ansi-color)