;;; whitespace.el --- minor mode to visualize TAB, (HARD) SPACE, NEWLINE
-;; Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
-;; Free Software Foundation, Inc.
+;; Copyright (C) 2000-2011 Free Software Foundation, Inc.
;; Author: Vinicius Jose Latorre <viniciusjl@ig.com.br>
;; Maintainer: Vinicius Jose Latorre <viniciusjl@ig.com.br>
;; Keywords: data, wp
-;; Version: 11.2.2
+;; Version: 13.2
;; X-URL: http://www.emacswiki.org/cgi-bin/wiki/ViniciusJoseLatorre
;; This file is part of GNU Emacs.
;; characters over the default mechanism of `nobreak-char-display'
;; (which see) and `show-trailing-whitespace' (which see).
;;
+;; The trailing spaces are not highlighted while point is at end of line.
+;; Also the spaces at beginning of buffer are not highlighted while point is at
+;; beginning of buffer; and the spaces at end of buffer are not highlighted
+;; while point is at end of buffer.
+;;
;; There are two ways of using whitespace: local and global.
;;
;; * Local whitespace affects only the current buffer.
;;
;; To use whitespace, insert in your ~/.emacs:
;;
-;; (require 'whitespace-mode)
+;; (require 'whitespace)
;;
;; Or autoload at least one of the commands`whitespace-mode',
;; `whitespace-toggle-options', `global-whitespace-mode' or
"Visualize blanks (TAB, (HARD) SPACE and NEWLINE)."
:link '(emacs-library-link :tag "Source Lisp File" "whitespace.el")
:version "23.1"
- :group 'wp
- :group 'data)
+ :group 'convenience)
(defcustom whitespace-style
- '(tabs spaces trailing lines space-before-tab newline
- indentation empty space-after-tab
- space-mark tab-mark newline-mark)
+ '(face
+ tabs spaces trailing lines space-before-tab newline
+ indentation empty space-after-tab
+ space-mark tab-mark newline-mark)
"Specify which kind of blank is visualized.
It's a list containing some or all of the following values:
+ face enable all visualization via faces (see below).
+
trailing trailing blanks are visualized via faces.
+ It has effect only if `face' (see above)
+ is present in `whitespace-style'.
tabs TABs are visualized via faces.
+ It has effect only if `face' (see above)
+ is present in `whitespace-style'.
spaces SPACEs and HARD SPACEs are visualized via
faces.
+ It has effect only if `face' (see above)
+ is present in `whitespace-style'.
- lines lines whose have columns beyond
+ lines lines which have columns beyond
`whitespace-line-column' are highlighted via
- faces .
+ faces.
Whole line is highlighted.
It has precedence over `lines-tail' (see
below).
+ It has effect only if `face' (see above)
+ is present in `whitespace-style'.
- lines-tail lines whose have columns beyond
+ lines-tail lines which have columns beyond
`whitespace-line-column' are highlighted via
faces.
But only the part of line which goes
beyond `whitespace-line-column' column.
It has effect only if `lines' (see above)
- is not present in `whitespace-style'.
+ is not present in `whitespace-style'
+ and if `face' (see above) is present in
+ `whitespace-style'.
newline NEWLINEs are visualized via faces.
+ It has effect only if `face' (see above)
+ is present in `whitespace-style'.
empty empty lines at beginning and/or end of buffer
are visualized via faces.
+ It has effect only if `face' (see above)
+ is present in `whitespace-style'.
indentation::tab 8 or more SPACEs at beginning of line are
visualized via faces.
+ It has effect only if `face' (see above)
+ is present in `whitespace-style'.
indentation::space TABs at beginning of line are visualized via
faces.
+ It has effect only if `face' (see above)
+ is present in `whitespace-style'.
indentation 8 or more SPACEs at beginning of line are
visualized, if `indent-tabs-mode' (which see)
is non-nil; otherwise, TABs at beginning of
line are visualized via faces.
+ It has effect only if `face' (see above)
+ is present in `whitespace-style'.
space-after-tab::tab 8 or more SPACEs after a TAB are
visualized via faces.
+ It has effect only if `face' (see above)
+ is present in `whitespace-style'.
space-after-tab::space TABs are visualized when 8 or more
SPACEs occur after a TAB, via faces.
+ It has effect only if `face' (see above)
+ is present in `whitespace-style'.
space-after-tab 8 or more SPACEs after a TAB are
visualized, if `indent-tabs-mode'
(which see) is non-nil; otherwise,
the TABs are visualized via faces.
+ It has effect only if `face' (see above)
+ is present in `whitespace-style'.
space-before-tab::tab SPACEs before TAB are visualized via
faces.
+ It has effect only if `face' (see above)
+ is present in `whitespace-style'.
space-before-tab::space TABs are visualized when SPACEs occur
before TAB, via faces.
+ It has effect only if `face' (see above)
+ is present in `whitespace-style'.
space-before-tab SPACEs before TAB are visualized, if
`indent-tabs-mode' (which see) is
non-nil; otherwise, the TABs are
visualized via faces.
+ It has effect only if `face' (see above)
+ is present in `whitespace-style'.
space-mark SPACEs and HARD SPACEs are visualized via
display table.
If nil, don't visualize TABs, (HARD) SPACEs and NEWLINEs via faces and
via display table.
-There is an evaluation order for some values, if some values are
+There is an evaluation order for some values, if they are
included in `whitespace-style' list. For example, if
indentation, indentation::tab and/or indentation::space are
included in `whitespace-style' list. The evaluation order for
included in `whitespace-style' list, the indentation value is
evaluated instead of indentation::space value.
+One reason for not visualize spaces via faces (if `face' is not
+included in `whitespace-style') is to use exclusively for
+cleanning up a buffer. See `whitespace-cleanup' and
+`whitespace-cleanup-region' for documentation.
+
See also `whitespace-display-mappings' for documentation."
:type '(repeat :tag "Kind of Blank"
(choice :tag "Kind of Blank Face"
+ (const :tag "(Face) Face visualization"
+ face)
(const :tag "(Face) Trailing TABs, SPACEs and HARD SPACEs"
trailing)
(const :tag "(Face) SPACEs and HARD SPACEs"
(defface whitespace-space
'((((class color) (background dark))
- (:background "grey20" :foreground "aquamarine3"))
+ (:background "grey20" :foreground "darkgray"))
(((class color) (background light))
- (:background "LightYellow" :foreground "aquamarine3"))
+ (:background "LightYellow" :foreground "lightgray"))
(t (:inverse-video t)))
"Face used to visualize SPACE."
:group 'whitespace)
(defface whitespace-hspace ; 'nobreak-space
'((((class color) (background dark))
- (:background "grey24" :foreground "aquamarine3"))
+ (:background "grey24" :foreground "darkgray"))
(((class color) (background light))
- (:background "LemonChiffon3" :foreground "aquamarine3"))
+ (:background "LemonChiffon3" :foreground "lightgray"))
(t (:inverse-video t)))
"Face used to visualize HARD SPACE."
:group 'whitespace)
(defface whitespace-tab
'((((class color) (background dark))
- (:background "grey22" :foreground "aquamarine3"))
+ (:background "grey22" :foreground "darkgray"))
(((class color) (background light))
- (:background "beige" :foreground "aquamarine3"))
+ (:background "beige" :foreground "lightgray"))
(t (:inverse-video t)))
"Face used to visualize TAB."
:group 'whitespace)
:group 'whitespace)
-(defcustom whitespace-empty-at-bob-regexp "\\`\\(\\([ \t]*\n\\)+\\)"
+(defcustom whitespace-empty-at-bob-regexp "^\\(\\([ \t]*\n\\)+\\)"
"Specify regexp for empty lines at beginning of buffer.
If you're using `mule' package, there may be other characters besides:
:group 'whitespace)
-(defcustom whitespace-empty-at-eob-regexp "^\\([ \t\n]+\\)\\'"
+(defcustom whitespace-empty-at-eob-regexp "^\\([ \t\n]+\\)"
"Specify regexp for empty lines at end of buffer.
If you're using `mule' package, there may be other characters besides:
(defcustom whitespace-line-column 80
"Specify column beyond which the line is highlighted.
+It must be an integer or nil. If nil, the `fill-column' variable value is
+used.
+
Used when `whitespace-style' includes `lines' or `lines-tail'."
- :type '(integer :tag "Line Length")
+ :type '(choice :tag "Line Length Limit"
+ (integer :tag "Line Length")
+ (const :tag "Use fill-column" nil))
:group 'whitespace)
;; Hacked from `visible-whitespace-mappings' in visws.el
(defcustom whitespace-display-mappings
'(
- (space-mark ?\ [?\xB7] [?.]) ; space - centered dot
- (space-mark ?\xA0 [?\xA4] [?_]) ; hard space - currency
+ (space-mark ?\ [?\u00B7] [?.]) ; space - centered dot
+ (space-mark ?\xA0 [?\u00A4] [?_]) ; hard space - currency
(space-mark ?\x8A0 [?\x8A4] [?_]) ; hard space - currency
(space-mark ?\x920 [?\x924] [?_]) ; hard space - currency
(space-mark ?\xE20 [?\xE24] [?_]) ; hard space - currency
;; NEWLINE is displayed using the face `whitespace-newline'
(newline-mark ?\n [?$ ?\n]) ; eol - dollar sign
;; (newline-mark ?\n [?\u21B5 ?\n] [?$ ?\n]) ; eol - downwards arrow
- ;; (newline-mark ?\n [?\xB6 ?\n] [?$ ?\n]) ; eol - pilcrow
+ ;; (newline-mark ?\n [?\u00B6 ?\n] [?$ ?\n]) ; eol - pilcrow
;; (newline-mark ?\n [?\x8AF ?\n] [?$ ?\n]) ; eol - overscore
;; (newline-mark ?\n [?\x8AC ?\n] [?$ ?\n]) ; eol - negation
;; (newline-mark ?\n [?\x8B0 ?\n] [?$ ?\n]) ; eol - grade
;; character ?\xBB at that column followed by a TAB which goes to
;; the next TAB column.
;; If this is a problem for you, please, comment the line below.
- (tab-mark ?\t [?\xBB ?\t] [?\\ ?\t]) ; tab - left quote mark
+ (tab-mark ?\t [?\u00BB ?\t] [?\\ ?\t]) ; tab - left quote mark
)
"Specify an alist of mappings for displaying characters.
If ARG is null, toggle whitespace visualization.
If ARG is a number greater than zero, turn on visualization;
otherwise, turn off visualization.
-Only useful with a windowing system.
See also `whitespace-style', `whitespace-newline' and
`whitespace-display-mappings'."
If ARG is null, toggle NEWLINE visualization.
If ARG is a number greater than zero, turn on visualization;
otherwise, turn off visualization.
-Only useful with a windowing system.
Use `whitespace-newline-mode' only for NEWLINE visualization
exclusively. For other visualizations, including NEWLINE
:init-value nil
:global nil
:group 'whitespace
- (let ((whitespace-style '(newline-mark newline)))
+ (let ((whitespace-style '(face newline-mark newline)))
(whitespace-mode whitespace-newline-mode)
;; sync states (running a batch job)
(setq whitespace-newline-mode whitespace-mode)))
If ARG is null, toggle whitespace visualization.
If ARG is a number greater than zero, turn on visualization;
otherwise, turn off visualization.
-Only useful with a windowing system.
See also `whitespace-style', `whitespace-newline' and
`whitespace-display-mappings'."
If ARG is null, toggle NEWLINE visualization.
If ARG is a number greater than zero, turn on visualization;
otherwise, turn off visualization.
-Only useful with a windowing system.
Use `global-whitespace-newline-mode' only for NEWLINE
visualization exclusively. For other visualizations, including
NEWLINE visualization together with (HARD) SPACEs and/or TABs,
-please, use `global-whitespace-mode'.
+please use `global-whitespace-mode'.
See also `whitespace-newline' and `whitespace-display-mappings'."
:lighter " NL"
:global t
:group 'whitespace
(let ((whitespace-style '(newline-mark newline)))
- (global-whitespace-mode global-whitespace-newline-mode)
+ (global-whitespace-mode (if global-whitespace-newline-mode
+ 1 -1))
;; sync states (running a batch job)
(setq global-whitespace-newline-mode global-whitespace-mode)))
(defconst whitespace-style-value-list
- '(tabs
+ '(face
+ tabs
spaces
trailing
lines
(defconst whitespace-toggle-option-alist
- '((?t . tabs)
+ '((?f . face)
+ (?t . tabs)
(?s . spaces)
(?r . trailing)
(?l . lines)
(defvar whitespace-tab-width tab-width
"Used to save locally `tab-width' value.")
+(defvar whitespace-point (point)
+ "Used to save locally current point value.
+Used by `whitespace-trailing-regexp' function (which see).")
+
+(defvar whitespace-font-lock-refontify nil
+ "Used to save locally the font-lock refontify state.
+Used by `whitespace-post-command-hook' function (which see).")
+
+(defvar whitespace-bob-marker nil
+ "Used to save locally the bob marker value.
+Used by `whitespace-post-command-hook' function (which see).")
+
+(defvar whitespace-eob-marker nil
+ "Used to save locally the eob marker value.
+Used by `whitespace-post-command-hook' function (which see).")
+
+(defvar whitespace-buffer-changed nil
+ "Used to indicate locally if buffer changed.
+Used by `whitespace-post-command-hook' and `whitespace-buffer-changed'
+functions (which see).")
+
;;;###autoload
(defun whitespace-toggle-options (arg)
CHAR MEANING
(VIA FACES)
+ f toggle face visualization
t toggle TAB visualization
s toggle SPACE and HARD SPACE visualization
r toggle trailing blanks visualization
Non-interactively, ARG should be a symbol or a list of symbols.
The valid symbols are:
+ face toggle face visualization
tabs toggle TAB visualization
spaces toggle SPACE and HARD SPACE visualization
trailing toggle trailing blanks visualization
whitespace-style restore `whitespace-style' value
-Only useful with a windowing system.
-
See `whitespace-style' and `indent-tabs-mode' for documentation."
(interactive (whitespace-interactive-char t))
(let ((whitespace-style
CHAR MEANING
(VIA FACES)
+ f toggle face visualization
t toggle TAB visualization
s toggle SPACE and HARD SPACE visualization
r toggle trailing blanks visualization
Non-interactively, ARG should be a symbol or a list of symbols.
The valid symbols are:
+ face toggle face visualization
tabs toggle TAB visualization
spaces toggle SPACE and HARD SPACE visualization
trailing toggle trailing blanks visualization
whitespace-style restore `whitespace-style' value
-Only useful with a windowing system.
-
See `whitespace-style' and `indent-tabs-mode' for documentation."
(interactive (whitespace-interactive-char nil))
(let ((whitespace-style
(let (overwrite-mode) ; enforce no overwrite
(goto-char (point-min))
(when (re-search-forward
- whitespace-empty-at-bob-regexp nil t)
+ (concat "\\`" whitespace-empty-at-bob-regexp) nil t)
(delete-region (match-beginning 1) (match-end 1)))
(when (re-search-forward
- whitespace-empty-at-eob-regexp nil t)
+ (concat whitespace-empty-at-eob-regexp "\\'") nil t)
(delete-region (match-beginning 1) (match-end 1)))))))
;; PROBLEM 3: 8 or more SPACEs at bol
;; PROBLEM 4: SPACEs before TAB
(whitespace-replace-action
(if whitespace-indent-tabs-mode 'tabify 'untabify)
rstart rend whitespace-space-before-tab-regexp
- (if whitespace-indent-tabs-mode 1 2)))
+ (if whitespace-indent-tabs-mode 0 2)))
;; ACTION: replace SPACEs before TAB by TABs.
((memq 'space-before-tab::tab whitespace-style)
(whitespace-replace-action
'tabify rstart rend
- whitespace-space-before-tab-regexp 1))
+ whitespace-space-before-tab-regexp 0))
;; ACTION: replace TABs by SPACEs.
((memq 'space-before-tab::space whitespace-style)
(whitespace-replace-action
(defconst whitespace-help-text
"\
- Whitespace Toggle Options
-
- FACES
+ Whitespace Toggle Options | scroll up : SPC or > |
+ | scroll down: M-SPC or < |
+ FACES \\__________________________/
+ [] f - toggle face visualization
[] t - toggle TAB visualization
[] s - toggle SPACE and HARD SPACE visualization
[] r - toggle trailing blanks visualization
(unless (get-buffer whitespace-help-buffer-name)
(delete-other-windows)
(let ((buffer (get-buffer-create whitespace-help-buffer-name)))
- (save-excursion
- (set-buffer buffer)
+ (with-current-buffer buffer
(erase-buffer)
(insert whitespace-help-text)
(whitespace-insert-option-mark
"Display BUFFER in a new window."
(goto-char (point-min))
(set-buffer-modified-p nil)
- (let ((size (- (window-height)
- (max window-min-height
- (1+ (count-lines (point-min)
- (point-max)))))))
- (when (<= size 0)
- (kill-buffer buffer)
- (error "Frame height is too small; \
+ (when (< (window-height) (* 2 window-min-height))
+ (kill-buffer buffer)
+ (error "Window height is too small; \
can't split window to display whitespace toggle options"))
- (set-window-buffer (split-window nil size) buffer)))
+ (let ((win (split-window)))
+ (set-window-buffer win buffer)
+ (shrink-window-if-larger-than-buffer win)))
(defun whitespace-kill-buffer (buffer-name)
(whitespace-kill-buffer whitespace-help-buffer-name))
+(defun whitespace-help-scroll (&optional up)
+ "Scroll help window, if it exists.
+
+If UP is non-nil, scroll up; otherwise, scroll down."
+ (condition-case data-help
+ (let ((buffer (get-buffer whitespace-help-buffer-name)))
+ (if buffer
+ (with-selected-window (get-buffer-window buffer)
+ (if up
+ (scroll-up 3)
+ (scroll-down 3)))
+ (ding)))
+ ;; handler
+ ((error)
+ ;; just ignore error
+ )))
+
+
(defun whitespace-interactive-char (local-p)
"Interactive function to read a char and return a symbol.
CHAR MEANING
(VIA FACES)
+ f toggle face visualization
t toggle TAB visualization
s toggle SPACE and HARD SPACE visualization
r toggle trailing blanks visualization
(cdr
(assq ch whitespace-toggle-option-alist)))))
;; while body
- (if (eq ch ?\?)
- (whitespace-help-on style)
- (ding)))
+ (cond
+ ((eq ch ?\?) (whitespace-help-on style))
+ ((eq ch ?\ ) (whitespace-help-scroll t))
+ ((eq ch ?\M- ) (whitespace-help-scroll))
+ ((eq ch ?>) (whitespace-help-scroll t))
+ ((eq ch ?<) (whitespace-help-scroll))
+ (t (ding))))
(whitespace-help-off)
(message " ")) ; clean echo area
;; handler
((quit error)
(whitespace-help-off)
(error (error-message-string data)))))
- (list sym))) ; return the apropriate symbol
+ (list sym))) ; return the appropriate symbol
(defun whitespace-toggle-list (local-p arg the-list)
(defun whitespace-style-face-p ()
"Return t if there is some visualization via face."
- (or (memq 'tabs whitespace-active-style)
- (memq 'spaces whitespace-active-style)
- (memq 'trailing whitespace-active-style)
- (memq 'lines whitespace-active-style)
- (memq 'lines-tail whitespace-active-style)
- (memq 'newline whitespace-active-style)
- (memq 'empty whitespace-active-style)
- (memq 'indentation whitespace-active-style)
- (memq 'indentation::tab whitespace-active-style)
- (memq 'indentation::space whitespace-active-style)
- (memq 'space-after-tab whitespace-active-style)
- (memq 'space-after-tab::tab whitespace-active-style)
- (memq 'space-after-tab::space whitespace-active-style)
- (memq 'space-before-tab whitespace-active-style)
- (memq 'space-before-tab::tab whitespace-active-style)
- (memq 'space-before-tab::space whitespace-active-style)))
+ (and (memq 'face whitespace-active-style)
+ (or (memq 'tabs whitespace-active-style)
+ (memq 'spaces whitespace-active-style)
+ (memq 'trailing whitespace-active-style)
+ (memq 'lines whitespace-active-style)
+ (memq 'lines-tail whitespace-active-style)
+ (memq 'newline whitespace-active-style)
+ (memq 'empty whitespace-active-style)
+ (memq 'indentation whitespace-active-style)
+ (memq 'indentation::tab whitespace-active-style)
+ (memq 'indentation::space whitespace-active-style)
+ (memq 'space-after-tab whitespace-active-style)
+ (memq 'space-after-tab::tab whitespace-active-style)
+ (memq 'space-after-tab::space whitespace-active-style)
+ (memq 'space-before-tab whitespace-active-style)
+ (memq 'space-before-tab::tab whitespace-active-style)
+ (memq 'space-before-tab::space whitespace-active-style))))
(defun whitespace-color-on ()
(setq whitespace-font-lock t
whitespace-font-lock-keywords
(copy-sequence font-lock-keywords)))
+ ;; save current point and refontify when necessary
+ (set (make-local-variable 'whitespace-point)
+ (point))
+ (set (make-local-variable 'whitespace-font-lock-refontify)
+ 0)
+ (set (make-local-variable 'whitespace-bob-marker)
+ (point-min-marker))
+ (set (make-local-variable 'whitespace-eob-marker)
+ (point-max-marker))
+ (set (make-local-variable 'whitespace-buffer-changed)
+ nil)
+ (add-hook 'post-command-hook #'whitespace-post-command-hook nil t)
+ (add-hook 'before-change-functions #'whitespace-buffer-changed nil t)
;; turn off font lock
(set (make-local-variable 'whitespace-font-lock-mode)
font-lock-mode)
nil
(list
;; Show trailing blanks
- (list whitespace-trailing-regexp 1 whitespace-trailing t))
+ (list #'whitespace-trailing-regexp 1 whitespace-trailing t))
t))
(when (or (memq 'lines whitespace-active-style)
(memq 'lines-tail whitespace-active-style))
(list
;; Show "long" lines
(list
- (format
- "^\\([^\t\n]\\{%s\\}\\|[^\t\n]\\{0,%s\\}\t\\)\\{%d\\}%s\\(.+\\)$"
- whitespace-tab-width (1- whitespace-tab-width)
- (/ whitespace-line-column tab-width)
- (let ((rem (% whitespace-line-column whitespace-tab-width)))
- (if (zerop rem)
- ""
- (format ".\\{%d\\}" rem))))
+ (let ((line-column (or whitespace-line-column fill-column)))
+ (format
+ "^\\([^\t\n]\\{%s\\}\\|[^\t\n]\\{0,%s\\}\t\\)\\{%d\\}%s\\(.+\\)$"
+ whitespace-tab-width
+ (1- whitespace-tab-width)
+ (/ line-column whitespace-tab-width)
+ (let ((rem (% line-column whitespace-tab-width)))
+ (if (zerop rem)
+ ""
+ (format ".\\{%d\\}" rem)))))
(if (memq 'lines whitespace-active-style)
0 ; whole line
2) ; line tail
nil
(list
;; Show empty lines at beginning of buffer
- (list whitespace-empty-at-bob-regexp
+ (list #'whitespace-empty-at-bob-regexp
1 whitespace-empty t))
t)
(font-lock-add-keywords
nil
(list
;; Show empty lines at end of buffer
- (list whitespace-empty-at-eob-regexp
+ (list #'whitespace-empty-at-eob-regexp
1 whitespace-empty t))
t))
(cond
;; turn off font lock
(when (whitespace-style-face-p)
(font-lock-mode 0)
+ (remove-hook 'post-command-hook #'whitespace-post-command-hook t)
+ (remove-hook 'before-change-functions #'whitespace-buffer-changed t)
(when whitespace-font-lock
(setq whitespace-font-lock nil
font-lock-keywords whitespace-font-lock-keywords))
;; restore original font lock state
(font-lock-mode whitespace-font-lock-mode)))
+
+(defun whitespace-trailing-regexp (limit)
+ "Match trailing spaces which do not contain the point at end of line."
+ (let ((status t))
+ (while (if (re-search-forward whitespace-trailing-regexp limit t)
+ (save-match-data
+ (= whitespace-point (match-end 1))) ;; loop if point at eol
+ (setq status nil))) ;; end of buffer
+ status))
+
+
+(defun whitespace-empty-at-bob-regexp (limit)
+ "Match spaces at beginning of buffer which do not contain the point at \
+beginning of buffer."
+ (let ((b (point))
+ r)
+ (cond
+ ;; at bob
+ ((= b 1)
+ (setq r (and (/= whitespace-point 1)
+ (looking-at whitespace-empty-at-bob-regexp)))
+ (if r
+ (set-marker whitespace-bob-marker (match-end 1))
+ (set-marker whitespace-bob-marker b)))
+ ;; inside bob empty region
+ ((<= limit whitespace-bob-marker)
+ (setq r (looking-at whitespace-empty-at-bob-regexp))
+ (if r
+ (when (< (match-end 1) limit)
+ (set-marker whitespace-bob-marker (match-end 1)))
+ (set-marker whitespace-bob-marker b)))
+ ;; intersection with end of bob empty region
+ ((<= b whitespace-bob-marker)
+ (setq r (looking-at whitespace-empty-at-bob-regexp))
+ (if r
+ (set-marker whitespace-bob-marker (match-end 1))
+ (set-marker whitespace-bob-marker b)))
+ ;; it is not inside bob empty region
+ (t
+ (setq r nil)))
+ ;; move to end of matching
+ (and r (goto-char (match-end 1)))
+ r))
+
+
+(defsubst whitespace-looking-back (regexp limit)
+ (save-excursion
+ (when (/= 0 (skip-chars-backward " \t\n" limit))
+ (unless (bolp)
+ (forward-line 1))
+ (looking-at regexp))))
+
+
+(defun whitespace-empty-at-eob-regexp (limit)
+ "Match spaces at end of buffer which do not contain the point at end of \
+buffer."
+ (let ((b (point))
+ (e (1+ (buffer-size)))
+ r)
+ (cond
+ ;; at eob
+ ((= limit e)
+ (when (/= whitespace-point e)
+ (goto-char limit)
+ (setq r (whitespace-looking-back whitespace-empty-at-eob-regexp b)))
+ (if r
+ (set-marker whitespace-eob-marker (match-beginning 1))
+ (set-marker whitespace-eob-marker limit)
+ (goto-char b))) ; return back to initial position
+ ;; inside eob empty region
+ ((>= b whitespace-eob-marker)
+ (goto-char limit)
+ (setq r (whitespace-looking-back whitespace-empty-at-eob-regexp b))
+ (if r
+ (when (> (match-beginning 1) b)
+ (set-marker whitespace-eob-marker (match-beginning 1)))
+ (set-marker whitespace-eob-marker limit)
+ (goto-char b))) ; return back to initial position
+ ;; intersection with beginning of eob empty region
+ ((>= limit whitespace-eob-marker)
+ (goto-char limit)
+ (setq r (whitespace-looking-back whitespace-empty-at-eob-regexp b))
+ (if r
+ (set-marker whitespace-eob-marker (match-beginning 1))
+ (set-marker whitespace-eob-marker limit)
+ (goto-char b))) ; return back to initial position
+ ;; it is not inside eob empty region
+ (t
+ (setq r nil)))
+ r))
+
+
+(defun whitespace-buffer-changed (beg end)
+ "Set `whitespace-buffer-changed' variable to t."
+ (setq whitespace-buffer-changed t))
+
+
+(defun whitespace-post-command-hook ()
+ "Save current point into `whitespace-point' variable.
+Also refontify when necessary."
+ (setq whitespace-point (point)) ; current point position
+ (let ((refontify
+ (or
+ ;; it is at end of line ...
+ (and (eolp)
+ ;; ... with trailing SPACE or TAB
+ (or (= (preceding-char) ?\ )
+ (= (preceding-char) ?\t)))
+ ;; it is at beginning of buffer (bob)
+ (= whitespace-point 1)
+ ;; the buffer was modified and ...
+ (and whitespace-buffer-changed
+ (or
+ ;; ... or inside bob whitespace region
+ (<= whitespace-point whitespace-bob-marker)
+ ;; ... or at bob whitespace region border
+ (and (= whitespace-point (1+ whitespace-bob-marker))
+ (= (preceding-char) ?\n))))
+ ;; it is at end of buffer (eob)
+ (= whitespace-point (1+ (buffer-size)))
+ ;; the buffer was modified and ...
+ (and whitespace-buffer-changed
+ (or
+ ;; ... or inside eob whitespace region
+ (>= whitespace-point whitespace-eob-marker)
+ ;; ... or at eob whitespace region border
+ (and (= whitespace-point (1- whitespace-eob-marker))
+ (= (following-char) ?\n)))))))
+ (when (or refontify (> whitespace-font-lock-refontify 0))
+ (setq whitespace-buffer-changed nil)
+ ;; adjust refontify counter
+ (setq whitespace-font-lock-refontify
+ (if refontify
+ 1
+ (1- whitespace-font-lock-refontify)))
+ ;; refontify
+ (jit-lock-refontify))))
+
\f
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;; Hacked from visws.el (Miles Bader <miles@gnu.org>)
(unless whitespace-display-table-was-local
(setq whitespace-display-table-was-local t
whitespace-display-table
+ (copy-sequence buffer-display-table))
+ ;; asure `buffer-display-table' is unique
+ ;; when two or more windows are visible.
+ (setq buffer-display-table
(copy-sequence buffer-display-table)))
(unless buffer-display-table
(setq buffer-display-table (make-display-table)))
(run-hooks 'whitespace-load-hook)
-;; arch-tag: 1b1e2500-dbd4-4a26-8f7a-5a5edfd3c97e
;;; whitespace.el ends here