(setq i (1+ i)))
(setcar alist entry)
(if branches
- (if (cdr alist)
- (error "Can't set branches for keyseq %s" keyseq)
- (setcdr alist branches)))))
+ (setcdr (last alist) branches))))
;;;###autoload
(defun lookup-nested-alist (keyseq alist &optional len start nil-for-too-long)
(detect-coding-region from to))))
\f
-;;; Composite character manipulations.
-
-;;;###autoload
-(defun compose-region (start end)
- "Compose all characters in the current region into one composite character.
-When called from a program, expects two arguments,
-positions (integers or markers) specifying the region."
- (interactive "r")
- (save-excursion
- (let ((str (buffer-substring start end)))
- (goto-char start)
- (insert (compose-string str))
- (delete-char (- end start)))))
-
-;;;###autoload
-(defun decompose-region (start end)
- "Decompose all composite characters in the current region.
-Composite characters are broken up into individual components.
-When called from a program, expects two arguments,
-positions (integers or markers) specifying the region."
- (interactive "r")
- (let ((buf (current-buffer))
- (cmpchar-head (char-to-string leading-code-composition)))
- (with-temp-buffer
- (insert-buffer-substring buf start end)
- (set-buffer-multibyte nil)
- (goto-char (point-min))
- (while (search-forward cmpchar-head nil t)
- (if (looking-at "[\240-\377][\240-\377][\240-\377][\240-\377]+")
- (let* ((from (1- (point)))
- (to (match-end 0))
- (str (string-as-multibyte (buffer-substring from to))))
- (if (cmpcharp (string-to-char str))
- (progn
- (delete-region from to)
- (insert (string-as-unibyte (decompose-string str))))
- (goto-char to)))))
- (set-buffer-multibyte t)
- (let ((tempbuf (current-buffer)))
- (save-excursion
- (set-buffer buf)
- (goto-char start)
- (delete-region start end)
- (insert-buffer-substring tempbuf))))))
-
-;;;###autoload
-(defun decompose-string (string)
- "Decompose all composite characters in STRING."
- (let ((len (length string))
- (idx 0)
- (i 0)
- (str-list nil)
- ch)
- (while (< idx len)
- (setq ch (aref string idx))
- (if (>= ch min-composite-char)
- (progn
- (if (> idx i)
- (setq str-list (cons (substring string i idx) str-list)))
- (setq str-list (cons (decompose-composite-char ch) str-list))
- (setq i (1+ idx))))
- (setq idx (1+ idx)))
- (if (not str-list)
- (copy-sequence string)
- (if (> idx i)
- (setq str-list (cons (substring string i idx) str-list)))
- (apply 'concat (nreverse str-list)))))
-
-;;;###autoload
-(defconst reference-point-alist
- '((tl . 0) (tc . 1) (tr . 2)
- (ml . 3) (mc . 4) (mr . 5)
- (bl . 6) (bc . 7) (br . 8)
- (top-left . 0) (top-center . 1) (top-right . 2)
- (mid-left . 3) (mid-center . 4) (mid-right . 5)
- (bottom-left . 6) (bottom-center . 7) (bottom-right . 8)
- (0 . 0) (1 . 1) (2 . 2)
- (3 . 3) (4 . 4) (5 . 5)
- (6 . 6) (7 . 7) (8 . 8))
- "Alist of reference point symbols vs reference point codes.
-A reference point symbol is to be used to specify a composition rule
-while making a composite character by the function `compose-chars'
-(which see).
-
-Meanings of reference point codes are as follows:
-
- 0----1----2 <-- ascent 0:tl or top-left
- | | 1:tc or top-center
- | | 2:tr or top-right
- | | 3:ml or mid-left
- | 4 <--+---- center 4:mc or mid-center
- | | 5:mr or mid-right
---- 3 5 <-- baseline 6:bl or bottom-left
- | | 7:bc or bottom-center
- 6----7----8 <-- descent 8:br or bottom-right
-
-Reference point symbols are to be used to specify composition rule of
-the form \(GLOBAL-REF-POINT . NEW-REF-POINT), where GLOBAL-REF-POINT
-is a reference point in the overall glyphs already composed, and
-NEW-REF-POINT is a reference point in the new glyph to be added.
-
-For instance, if GLOBAL-REF-POINT is 8 and NEW-REF-POINT is 1, the
-overall glyph is updated as follows:
-
- +-------+--+ <--- new ascent
- | | |
- | global| |
- | glyph | |
---- | | | <--- baseline (doesn't change)
- +----+--+--+
- | | new |
- | |glyph|
- +----+-----+ <--- new descent
-")
-
-;; Return a string for char CH to be embedded in multibyte form of
-;; composite character.
-;;;###autoload
-(defun compose-chars-component (ch)
- (if (< ch 128)
- (format "\240%c" (+ ch 128))
- (let ((str (string-as-unibyte (char-to-string ch))))
- (if (cmpcharp ch)
- (if (= (aref str 1) ?\xFF)
- (error "Can't compose a rule-based composition character")
- (substring str (if (= (aref str 1) ?\xFF) 2 1)))
- (aset str 0 (+ (aref str 0) ?\x20))
- str))))
-
-;; Return a string for composition rule RULE to be embedded in
-;; multibyte form of composite character.
-(defsubst compose-chars-rule (rule)
- (char-to-string (+ ?\xA0
- (* (cdr (assq (car rule) reference-point-alist)) 9)
- (cdr (assq (cdr rule) reference-point-alist)))))
-
-;;;###autoload
-(defun compose-chars (first-component &rest args)
- "Return one char string composed from the arguments.
-For relative composition, each argument should be a non-composition character
-or a relative-composition character.
-For rule-based composition, Nth (where N is odd) argument should be
-a non-composition character or a rule-based-composition character,
-and Mth (where M is even) argument should be a composition rule.
-A composition rule has the form \(GLOBAL-REF-POINT . NEW-REF-POINT).
-See the documentation of `reference-point-alist' for more detail."
- (if (= (length args) 0)
- (char-to-string first-component)
- (let* ((with-rule (consp (car args)))
- (str (if (cmpcharp first-component)
- (string-as-unibyte (char-to-string first-component))
- (if with-rule
- (concat (vector leading-code-composition ?\xFF)
- (compose-chars-component first-component))
- (concat (char-to-string leading-code-composition)
- (compose-chars-component first-component))))))
- (if (and (cmpcharp first-component)
- (eq with-rule (/= (aref str 1) ?\xFF)))
- (error "%s-compostion-character is not allowed in %s composition: %c"
- (if with-rule "relative" "rule-based")
- (if with-rule "rule-based" "relative")
- first-component))
- (while args
- (if with-rule
- (setq str (concat str (compose-chars-rule (car args)))
- args (cdr args)))
- (if (cmpcharp (car args))
- (let ((cmp-str (string-as-unibyte (char-to-string (car args)))))
- (if (eq with-rule (/= (aref cmp-str 1) ?\xFF))
- (error "%s-compostion-character is not allowed in %s composition: %c"
- (if with-rule "relative" "rule-based")
- (if with-rule "rule-based" "relative")
- (car args)))
- (setq str (concat str (substring cmp-str
- (if with-rule 2 1)))))
- (setq str (concat str (compose-chars-component (car args)))))
- (setq args (cdr args)))
- (string-as-multibyte str))))
-
-;;;###autoload
-(defun decompose-composite-char (char &optional type with-composition-rule)
- "Convert composite character CHAR to a sequence of the components.
-Optional 1st arg TYPE specifies the type of sequence returned.
-It should be `string' (default), `list', or `vector'.
-Optional 2nd arg WITH-COMPOSITION-RULE non-nil means the returned
-sequence contains embedded composition rules if any. In this case, the
-order of elements in the sequence is the same as arguments for
-`compose-chars' to create CHAR.
-If TYPE is omitted or is `string', composition rules are omitted
-even if WITH-COMPOSITION-RULE is t."
- (or type
- (setq type 'string))
- (let* ((len (composite-char-component-count char))
- (i (1- len))
- l)
- (setq with-composition-rule (and with-composition-rule
- (not (eq type 'string))
- (composite-char-composition-rule-p char)))
- (while (> i 0)
- (setq l (cons (composite-char-component char i) l))
- (if with-composition-rule
- (let ((rule (- (composite-char-composition-rule char i) ?\xA0)))
- (setq l (cons (cons (/ rule 9) (% rule 9)) l))))
- (setq i (1- i)))
- (setq l (cons (composite-char-component char 0) l))
- (cond ((eq type 'string)
- (apply 'string l))
- ((eq type 'list)
- l)
- (t ; i.e. TYPE is vector
- (vconcat l)))))
-
;;; mule-util.el ends here
+
projects / emacs.git / commitdiff