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[Emacs-diffs] Changes to emacs/lisp/composite.el,v
From: |
Miles Bader |
Subject: |
[Emacs-diffs] Changes to emacs/lisp/composite.el,v |
Date: |
Fri, 01 Feb 2008 16:02:54 +0000 |
CVSROOT: /cvsroot/emacs
Module name: emacs
Changes by: Miles Bader <miles> 08/02/01 16:01:31
Index: lisp/composite.el
===================================================================
RCS file: /cvsroot/emacs/emacs/lisp/composite.el,v
retrieving revision 1.24
retrieving revision 1.25
diff -u -b -r1.24 -r1.25
--- lisp/composite.el 8 Jan 2008 20:44:59 -0000 1.24
+++ lisp/composite.el 1 Feb 2008 16:01:10 -0000 1.25
@@ -28,7 +28,6 @@
;;; Code:
-;;;###autoload
(defconst reference-point-alist
'((tl . 0) (tc . 1) (tr . 2)
(Bl . 3) (Bc . 4) (Br . 5)
@@ -43,8 +42,7 @@
(mid-left . 3) (mid-center . 10) (mid-right . 5))
"Alist of symbols vs integer codes of glyph reference points.
A glyph reference point symbol is to be used to specify a composition
-rule in COMPONENTS argument to such functions as `compose-region' and
-`make-composition'.
+rule in COMPONENTS argument to such functions as `compose-region'.
Meanings of glyph reference point codes are as follows:
@@ -77,7 +75,12 @@
| | new |
| |glyph|
+----+-----+ <--- new descent
-")
+
+A composition rule may have the form \(GLOBAL-REF-POINT
+NEW-REF-POINT XOFF YOFF), where XOFF and YOFF specifies how much
+to shift NEW-REF-POINT from GLOBAL-REF-POINT. In this case, XOFF
+and YOFF are integers in the range -100..100 representing the
+shifting percentage against the font size.")
;;;###autoload
@@ -92,17 +95,29 @@
(if (and (integerp rule) (< rule 144))
;; Already encoded.
rule
- (or (consp rule)
- (error "Invalid composition rule: %S" rule))
+ (if (consp rule)
(let ((gref (car rule))
- (nref (cdr rule)))
+ (nref (cdr rule))
+ xoff yoff)
+ (if (consp nref) ; (GREF NREF XOFF YOFF)
+ (progn
+ (setq xoff (nth 1 nref)
+ yoff (nth 2 nref)
+ nref (car nref))
+ (or (and (>= xoff -100) (<= xoff 100)
+ (>= yoff -100) (<= yoff 100))
+ (error "Invalid compostion rule: %s" rule))
+ (setq xoff (+ xoff 128) yoff (+ yoff 128)))
+ ;; (GREF . NREF)
+ (setq xoff 0 yoff 0))
(or (integerp gref)
(setq gref (cdr (assq gref reference-point-alist))))
(or (integerp nref)
(setq nref (cdr (assq nref reference-point-alist))))
(or (and (>= gref 0) (< gref 12) (>= nref 0) (< nref 12))
(error "Invalid composition rule: %S" rule))
- (+ (* gref 12) nref))))
+ (logior (lsh xoff 16) (lsh yoff 8) (+ (* gref 12) nref)))
+ (error "Invalid composition rule: %S" rule))))
;; Decode encoded composition rule RULE-CODE. The value is a cons of
;; global and new reference point symbols.
@@ -110,13 +125,20 @@
;; defined in composite.h.
(defun decode-composition-rule (rule-code)
- (or (and (natnump rule-code) (< rule-code 144))
+ (or (and (natnump rule-code) (< rule-code #x1000000))
(error "Invalid encoded composition rule: %S" rule-code))
- (let ((gref (car (rassq (/ rule-code 12) reference-point-alist)))
- (nref (car (rassq (% rule-code 12) reference-point-alist))))
+ (let ((xoff (lsh rule-code -16))
+ (yoff (logand (lsh rule-code -8) #xFF))
+ gref nref)
+ (setq rule-code (logand rule-code #xFF)
+ gref (car (rassq (/ rule-code 12) reference-point-alist))
+ nref (car (rassq (% rule-code 12) reference-point-alist)))
(or (and gref (symbolp gref) nref (symbolp nref))
(error "Invalid composition rule code: %S" rule-code))
- (cons gref nref)))
+ (if (and (= xoff 0) (= yoff 0))
+ (cons gref nref)
+ (setq xoff (- xoff 128) yoff (- yoff 128))
+ (list gref xoff yoff nref))))
;; Encode composition rules in composition components COMPONENTS. The
;; value is a copy of COMPONENTS, where composition rules (cons of
@@ -160,7 +182,6 @@
(setq i (+ i 2))))
components)
-;;;###autoload
(defun compose-region (start end &optional components modification-func)
"Compose characters in the current region.
@@ -172,9 +193,8 @@
First two arguments START and END are positions (integers or markers)
specifying the region.
-Optional 3rd argument COMPONENTS, if non-nil, is a character or a
-sequence (vector, list, or string) of integers. In this case,
-characters are composed not relatively but according to COMPONENTS.
+Optional 3rd argument COMPONENTS, if non-nil, is a character, a string
+or a vector or list of integers and rules.
If it is a character, it is an alternate character to display instead
of the text in the region.
@@ -201,7 +221,6 @@
(compose-region-internal start end components modification-func)
(restore-buffer-modified-p modified-p)))
-;;;###autoload
(defun decompose-region (start end)
"Decompose text in the current region.
@@ -213,11 +232,10 @@
(remove-text-properties start end '(composition nil))
(restore-buffer-modified-p modified-p)))
-;;;###autoload
(defun compose-string (string &optional start end components modification-func)
"Compose characters in string STRING.
-The return value is STRING where `composition' property is put on all
+The return value is STRING with the `composition' property put on all
the characters in it.
Optional 2nd and 3rd arguments START and END specify the range of
@@ -238,13 +256,11 @@
(compose-string-internal string start end components modification-func)
string)
-;;;###autoload
(defun decompose-string (string)
"Return STRING where `composition' property is removed."
(remove-text-properties 0 (length string) '(composition nil) string)
string)
-;;;###autoload
(defun compose-chars (&rest args)
"Return a string from arguments in which all characters are composed.
For relative composition, arguments are characters.
@@ -268,7 +284,6 @@
(setq str (concat args)))
(compose-string-internal str 0 (length str) components)))
-;;;###autoload
(defun find-composition (pos &optional limit string detail-p)
"Return information about a composition at or nearest to buffer position POS.
@@ -308,7 +323,6 @@
result))
-;;;###autoload
(defun compose-chars-after (pos &optional limit object)
"Compose characters in current buffer after position POS.
@@ -329,7 +343,7 @@
Optional 2nd arg LIMIT, if non-nil, limits the matching of text.
Optional 3rd arg OBJECT, if non-nil, is a string that contains the
-text to compose. In that case, POS and LIMIT index to the string.
+text to compose. In that case, POS and LIMIT index into the string.
This function is the default value of `compose-chars-after-function'."
(let ((tail (aref composition-function-table (char-after pos)))
@@ -349,7 +363,6 @@
(setq func nil tail (cdr tail)))))))
result))
-;;;###autoload
(defun compose-last-chars (args)
"Compose last characters.
The argument is a parameterized event of the form
@@ -370,13 +383,294 @@
(compose-region (- (point) chars) (point) (nth 2 args))
(compose-chars-after (- (point) chars) (point))))))
-;;;###autoload(global-set-key [compose-last-chars] 'compose-last-chars)
+(global-set-key [compose-last-chars] 'compose-last-chars)
+
+
+;;; Automatic character composition.
+
+(defvar composition-function-table
+ (make-char-table nil)
+ "Char table of functions for automatic character composition.
+For each character that has to be composed automatically with
+preceding and/or following characters, this char table contains
+a function to call to compose that character.
+
+An element, if non-nil, is FUNC or an alist of PATTERNs vs FUNCs,
+where PATTERNs are regular expressions and FUNCs are functions.
+If the element is FUNC, FUNC itself determines the region to
+compose.
+
+Each function is called with 5 arguments, FROM, TO, FONT-OBJECT,
+and STRING.
+
+If STRING is nil, FROM and TO are positions specifying the region
+maching with PATTERN in the current buffer, and the function has
+to compose character in that region (possibly with characters
+preceding FROM). The return value of the function is the end
+position where characters are composed.
+
+Otherwise, STRING is a string, and FROM and TO are indices into
+the string. In this case, the function has to compose a
+character in the string.
+
+FONT-OBJECT may be nil if not available (e.g. for the case of
+terminal).
+
+See also the command `toggle-auto-composition'.")
+
+;; Copied from font-lock.el.
+(eval-when-compile
+ ;; Borrowed from lazy-lock.el.
+ ;; We use this to preserve or protect things when modifying text properties.
+ (defmacro save-buffer-state (varlist &rest body)
+ "Bind variables according to VARLIST and eval BODY restoring buffer state."
+ `(let* ,(append varlist
+ '((modified (buffer-modified-p)) (buffer-undo-list t)
+ (inhibit-read-only t) (inhibit-point-motion-hooks t)
+ (inhibit-modification-hooks t)
+ deactivate-mark buffer-file-name buffer-file-truename))
+ ,@body
+ (unless modified
+ (restore-buffer-modified-p nil))))
+ ;; Fixme: This makes bootstrapping fail with this error.
+ ;; Symbol's function definition is void: eval-defun
+ ;;(def-edebug-spec save-buffer-state let)
+ )
+
+(put 'save-buffer-state 'lisp-indent-function 1)
+
+(defun terminal-composition-function (from to font-object string)
+ "General composition function used on terminal.
+Non-spacing characters are composed with the preceding spacing
+character. All non-spacing characters has this function in
+`terminal-composition-function-table'."
+ (let ((pos (1+ from)))
+ (if string
+ (progn
+ (while (and (< pos to)
+ (= (aref char-width-table (aref string pos)) 0))
+ (setq pos (1+ pos)))
+ (if (> from 0)
+ (compose-string string (1- from) pos)
+ (compose-string string from pos
+ (concat " " (buffer-substring from pos)))))
+ (while (and (< pos to)
+ (= (aref char-width-table (char-after pos)) 0))
+ (setq pos (1+ pos)))
+ (if (> from (point-min))
+ (compose-region (1- from) pos (buffer-substring from pos))
+ (compose-region from pos
+ (concat " " (buffer-substring from pos)))))
+ pos))
+
+(defvar terminal-composition-function-table
+ (let ((table (make-char-table nil)))
+ (map-char-table
+ #'(lambda (key val)
+ (if (= val 0) (set-char-table-range table key
+ 'terminal-composition-function)))
+ char-width-table)
+ table)
+ "Char table of functions for automatic character composition on terminal.
+This is like `composition-function-table' but used when Emacs is running
+on a terminal.")
+
+(defun auto-compose-chars (from to window string)
+ "Compose characters in the region between FROM and TO.
+WINDOW is a window displaying the current buffer.
+If STRING is non-nil, it is a string, and FROM and TO are indices
+into the string. In that case, compose characters in the string.
+
+This function is the default value of `auto-composition-function' (which see)."
+ (save-buffer-state nil
+ (save-excursion
+ (save-restriction
+ (save-match-data
+ (let ((table (if (display-graphic-p)
+ composition-function-table
+ terminal-composition-function-table))
+ (start from))
+ (setq to (or (text-property-any (1+ from) to 'auto-composed t
+ string)
+ to))
+ (if string
+ (while (< from to)
+ (let* ((ch (aref string from))
+ (elt (aref table ch))
+ font-obj newpos)
+ (when elt
+ (if window
+ (setq font-obj (font-at from window string)))
+ (if (functionp elt)
+ (setq newpos (funcall elt from to font-obj string))
+ (while (and elt
+ (or (not (eq (string-match (caar elt) string
+ from)
+ from))
+ (not (setq newpos
+ (funcall (cdar elt) from
+ (match-end 0)
+ font-obj string)))))
+ (setq elt (cdr elt)))))
+ (if (and newpos (> newpos from))
+ (setq from newpos)
+ (setq from (1+ from)))))
+ (narrow-to-region from to)
+ (while (< from to)
+ (let* ((ch (char-after from))
+ (elt (aref table ch))
+ func pattern font-obj newpos)
+ (when elt
+ (if window
+ (setq font-obj (font-at from window)))
+ (if (functionp elt)
+ (setq newpos (funcall elt from to font-obj nil))
+ (goto-char from)
+ (while (and elt
+ (or (not (looking-at (caar elt)))
+ (not (setq newpos
+ (funcall (cdar elt) from
+ (match-end 0)
+ font-obj nil)))))
+ (setq elt (cdr elt)))))
+ (if (and newpos (> newpos from))
+ (setq from newpos)
+ (setq from (1+ from))))))
+ (put-text-property start to 'auto-composed t string)))))))
+
+(make-variable-buffer-local 'auto-composition-function)
+
+;;;###autoload
+(define-minor-mode auto-composition-mode
+ "Toggle Auto Compostion mode.
+With arg, turn Auto Compostion mode off if and only if arg is a non-positive
+number; if arg is nil, toggle Auto Compostion mode; anything else turns Auto
+Compostion on.
+
+When Auto Composition is enabled, text characters are automatically composed
+by functions registered in `composition-function-table' (which see).
+
+You can use Global Auto Composition mode to automagically turn on
+Auto Composition mode in all buffers (this is the default)."
+ nil nil nil
+ (if noninteractive
+ (setq auto-composition-mode nil))
+ (cond (auto-composition-mode
+ (add-hook 'after-change-functions 'auto-composition-after-change nil t)
+ (setq auto-composition-function 'auto-compose-chars))
+ (t
+ (remove-hook 'after-change-functions 'auto-composition-after-change t)
+ (setq auto-composition-function nil)))
+ (save-buffer-state nil
+ (save-restriction
+ (widen)
+ (remove-text-properties (point-min) (point-max) '(auto-composed nil))
+ (decompose-region (point-min) (point-max)))))
+
+(defun auto-composition-after-change (start end old-len)
+ (save-buffer-state nil
+ (if (< start (point-min))
+ (setq start (point-min)))
+ (if (> end (point-max))
+ (setq end (point-max)))
+ (when (and auto-composition-mode (not memory-full))
+ (let (func1 func2)
+ (when (and (> start (point-min))
+ (setq func2 (aref composition-function-table
+ (char-after (1- start))))
+ (or (= start (point-max))
+ (not (setq func1 (aref composition-function-table
+ (char-after start))))
+ (eq func1 func2)))
+ (setq start (1- start)
+ func1 func2)
+ (while (eq func1 func2)
+ (if (> start (point-min))
+ (setq start (1- start)
+ func2 (aref composition-function-table
+ (char-after start)))
+ (setq func2 nil))))
+ (when (and (< end (point-max))
+ (setq func2 (aref composition-function-table
+ (char-after end)))
+ (or (= end (point-min))
+ (not (setq func1 (aref composition-function-table
+ (char-after (1- end)))))
+ (eq func1 func2)))
+ (setq end (1+ end)
+ func1 func2)
+ (while (eq func1 func2)
+ (if (< end (point-max))
+ (setq func2 (aref composition-function-table
+ (char-after end))
+ end (1+ end))
+ (setq func2 nil))))
+ (if (< start end)
+ (remove-text-properties start end '(auto-composed nil)))))))
+
+(defun turn-on-auto-composition-if-enabled ()
+ (if enable-multibyte-characters
+ (auto-composition-mode 1)))
+
+;;;###autoload
+(define-global-minor-mode global-auto-composition-mode
+ auto-composition-mode turn-on-auto-composition-if-enabled
+ :extra-args (dummy)
+ :initialize 'custom-initialize-safe-default
+ :init-value (not noninteractive)
+ :group 'auto-composition
+ :version "23.1")
+
+(defun toggle-auto-composition (&optional arg)
+ "Change whether automatic character composition is enabled in this buffer.
+With arg, enable it iff arg is positive."
+ (interactive "P")
+ (let ((enable (if (null arg) (not auto-composition-function)
+ (> (prefix-numeric-value arg) 0))))
+ (if enable
+ (kill-local-variable 'auto-composition-function)
+ (make-local-variable 'auto-composition-function)
+ (setq auto-composition-function nil)
+ (save-buffer-state nil
+ (save-restriction
+ (widen)
+ (decompose-region (point-min) (point-max)))))
+
+ (save-buffer-state nil
+ (save-restriction
+ (widen)
+ (remove-text-properties (point-min) (point-max)
+ '(auto-composed nil))))))
+
+(defun auto-compose-region (from to)
+ "Force automatic character composition on the region FROM and TO."
+ (save-excursion
+ (if (get-text-property from 'auto-composed)
+ (setq from (next-single-property-change from 'auto-composed nil to)))
+ (goto-char from)
+ (let ((modified-p (buffer-modified-p))
+ (inhibit-read-only '(composition auto-composed))
+ (stop (next-single-property-change (point) 'auto-composed nil to)))
+ (while (< (point) to)
+ (if (= (point) stop)
+ (progn
+ (goto-char (next-single-property-change (point)
+ 'auto-composed nil to))
+ (setq stop (next-single-property-change (point)
+ 'auto-composed nil to)))
+ (let ((func (aref composition-function-table (following-char)))
+ (pos (point)))
+ (if (functionp func)
+ (goto-char (funcall func (point) nil)))
+ (if (<= (point) pos)
+ (forward-char 1)))))
+ (put-text-property from to 'auto-composed t)
+ (set-buffer-modified-p modified-p))))
;; The following codes are only for backward compatibility with Emacs
;; 20.4 and earlier.
-;;;###autoload
(defun decompose-composite-char (char &optional type with-composition-rule)
"Convert CHAR to string.
@@ -388,7 +682,6 @@
((eq type 'list) (list char))
(t (vector char))))
-;;;###autoload
(make-obsolete 'decompose-composite-char 'char-to-string "21.1")
- [Emacs-diffs] Changes to emacs/lisp/composite.el,v,
Miles Bader <=