info.el

gcc-2.95.3 Linux下最常用的C编译器

	  (save-restriction
	    (if (marker-buffer Info-tag-table-marker)
		(let ((marker Info-tag-table-marker))
		  (set-buffer (marker-buffer marker))
		  (widen)
		  (goto-char marker)
		  (while (re-search-forward "\nNode: \\(.*\\)\177" nil t)
		    (setq compl
			  (cons (list (buffer-substring (match-beginning 1)
							(match-end 1)))
				compl))))
	      (widen)
	      (goto-char (point-min))
	      (while (search-forward "\n\^_" nil t)
		(forward-line 1)
		(let ((beg (point)))
		  (forward-line 1)
		  (if (re-search-backward "Node: *\\([^,\n]*\\) *[,\n\t]"
					  beg t)
		      (setq compl 
			    (cons (list (buffer-substring (match-beginning 1)
							  (match-end 1)))
				  compl))))))))
	(setq Info-current-file-completions compl))))

(defun Info-restore-point (hl)
  "If this node has been visited, restore the point value when we left."
  (while hl
    (if (and (equal (nth 0 (car hl)) Info-current-file)
	     ;; Use string-equal, not equal, to ignore text props.
	     (string-equal (nth 1 (car hl)) Info-current-node))
	(progn
	  (goto-char (nth 2 (car hl)))
	  (setq hl nil))		;terminate the while at next iter
      (setq hl (cdr hl)))))

(defvar Info-last-search nil
  "Default regexp for \\<Info-mode-map>\\[Info-search] command to search for.")

(defun Info-search (regexp)
  "Search for REGEXP, starting from point, and select node it's found in."
  (interactive "sSearch (regexp): ")
  (if transient-mark-mode (deactivate-mark))
  (if (equal regexp "")
      (setq regexp Info-last-search)
    (setq Info-last-search regexp))
  (let ((found ()) current
	(onode Info-current-node)
	(ofile Info-current-file)
	(opoint (point))
	(ostart (window-start))
	(osubfile Info-current-subfile))
    (save-excursion
      (save-restriction
	(widen)
	(if (null Info-current-subfile)
	    (progn (re-search-forward regexp) (setq found (point)))
	  (condition-case err
	      (progn (re-search-forward regexp) (setq found (point)))
	    (search-failed nil)))))
    (if (not found) ;can only happen in subfile case -- else would have erred
	(unwind-protect
	    (let ((list ()))
	      (save-excursion
		(set-buffer (marker-buffer Info-tag-table-marker))
		(goto-char (point-min))
		(search-forward "\n\^_\nIndirect:")
		(save-restriction
		  (narrow-to-region (point)
				    (progn (search-forward "\n\^_")
					   (1- (point))))
		  (goto-char (point-min))
		  (search-forward (concat "\n" osubfile ": "))
		  (beginning-of-line)
		  (while (not (eobp))
		    (re-search-forward "\\(^.*\\): [0-9]+$")
		    (goto-char (+ (match-end 1) 2))
		    (setq list (cons (cons (read (current-buffer))
					   (buffer-substring
					    (match-beginning 1) (match-end 1)))
				     list))
		    (goto-char (1+ (match-end 0))))
		  (setq list (nreverse list)
			current (car (car list))
			list (cdr list))))
	      (while list
		(message "Searching subfile %s..." (cdr (car list)))
		(Info-read-subfile (car (car list)))
		(setq list (cdr list))
;;		(goto-char (point-min))
		(if (re-search-forward regexp nil t)
		    (setq found (point) list ())))
	      (if found
		  (message "")
		(signal 'search-failed (list regexp))))
	  (if (not found)
	      (progn (Info-read-subfile osubfile)
		     (goto-char opoint)
		     (Info-select-node)
		     (set-window-start (selected-window) ostart)))))
    (widen)
    (goto-char found)
    (Info-select-node)
    ;; Use string-equal, not equal, to ignore text props.
    (or (and (string-equal onode Info-current-node)
	     (equal ofile Info-current-file))
	(setq Info-history (cons (list ofile onode opoint)
				 Info-history)))))

;; Extract the value of the node-pointer named NAME.
;; If there is none, use ERRORNAME in the error message; 
;; if ERRORNAME is nil, just return nil.
(defun Info-extract-pointer (name &optional errorname)
  (save-excursion
   (goto-char (point-min))
   (forward-line 1)
   (if (re-search-backward (concat name ":") nil t)
       (progn
	 (goto-char (match-end 0))
	 (Info-following-node-name))
     (if (eq errorname t)
	 nil
       (error "Node has no %s" (capitalize (or errorname name)))))))

;; Return the node name in the buffer following point.
;; ALLOWEDCHARS, if non-nil, goes within [...] to make a regexp
;; saying which chars may appear in the node name.
(defun Info-following-node-name (&optional allowedchars)
  (skip-chars-forward " \t")
  (buffer-substring-no-properties
   (point)
   (progn
     (while (looking-at (concat "[" (or allowedchars "^,\t\n") "]"))
       (skip-chars-forward (concat (or allowedchars "^,\t\n") "("))
       (if (looking-at "(")
	   (skip-chars-forward "^)")))
     (skip-chars-backward " ")
     (point))))

(defun Info-next ()
  "Go to the next node of this node."
  (interactive)
  (Info-goto-node (Info-extract-pointer "next")))

(defun Info-prev ()
  "Go to the previous node of this node."
  (interactive)
  (Info-goto-node (Info-extract-pointer "prev[ious]*" "previous")))

(defun Info-up ()
  "Go to the superior node of this node."
  (interactive)
  (Info-goto-node (Info-extract-pointer "up"))
  (Info-restore-point Info-history))

(defun Info-last ()
  "Go back to the last node visited."
  (interactive)
  (or Info-history
      (error "This is the first Info node you looked at"))
  (let (filename nodename opoint)
    (setq filename (car (car Info-history)))
    (setq nodename (car (cdr (car Info-history))))
    (setq opoint (car (cdr (cdr (car Info-history)))))
    (setq Info-history (cdr Info-history))
    (Info-find-node filename nodename)
    (setq Info-history (cdr Info-history))
    (goto-char opoint)))

(defun Info-directory ()
  "Go to the Info directory node."
  (interactive)
  (Info-find-node "dir" "top"))

(defun Info-follow-reference (footnotename)
  "Follow cross reference named NAME to the node it refers to.
NAME may be an abbreviation of the reference name."
  (interactive
   (let ((completion-ignore-case t)
	 completions default alt-default (start-point (point)) str i bol eol)
     (save-excursion
       ;; Store end and beginning of line.
       (end-of-line)
       (setq eol (point))
       (beginning-of-line)
       (setq bol (point))

       (goto-char (point-min))
       (while (re-search-forward "\\*note[ \n\t]*\\([^:]*\\):" nil t)
	 (setq str (buffer-substring
		    (match-beginning 1)
		    (1- (point))))
	 ;; See if this one should be the default.
	 (and (null default)
	      (<= (match-beginning 0) start-point)
	      (<= start-point (point))
	      (setq default t))
	 ;; See if this one should be the alternate default.
	 (and (null alt-default)
	      (and (<= bol (match-beginning 0))
		   (<= (point) eol))
	      (setq alt-default t))
	 (setq i 0)
	 (while (setq i (string-match "[ \n\t]+" str i))
	   (setq str (concat (substring str 0 i) " "
			     (substring str (match-end 0))))
	   (setq i (1+ i)))
	 ;; Record as a completion and perhaps as default.
	 (if (eq default t) (setq default str))
	 (if (eq alt-default t) (setq alt-default str))
	 ;; Don't add this string if it's a duplicate.
	 ;; We use a loop instead of "(assoc str completions)" because
	 ;; we want to do a case-insensitive compare.
	 (let ((tail completions)
	       (tem (downcase str)))
	   (while (and tail
		       (not (string-equal tem (downcase (car (car tail))))))
	     (setq tail (cdr tail)))
	   (or tail
	       (setq completions
		     (cons (cons str nil)
			   completions))))))
     ;; If no good default was found, try an alternate.
     (or default
	 (setq default alt-default))
     ;; If only one cross-reference found, then make it default.
     (if (eq (length completions) 1)
         (setq default (car (car completions))))
     (if completions
	 (let ((input (completing-read (if default
					   (concat "Follow reference named: ("
						   default ") ")
					 "Follow reference named: ")
				       completions nil t)))
	   (list (if (equal input "")
		     default input)))
       (error "No cross-references in this node"))))
  (let (target beg i (str (concat "\\*note " (regexp-quote footnotename))))
    (while (setq i (string-match " " str i))
      (setq str (concat (substring str 0 i) "[ \t\n]+" (substring str (1+ i))))
      (setq i (+ i 6)))
    (save-excursion
      (goto-char (point-min))
      (or (re-search-forward str nil t)
	  (error "No cross-reference named %s" footnotename))
      (goto-char (+ (match-beginning 0) 5))
      (setq target
	    (Info-extract-menu-node-name "Bad format cross reference" t)))
    (while (setq i (string-match "[ \t\n]+" target i))
      (setq target (concat (substring target 0 i) " "
			   (substring target (match-end 0))))
      (setq i (+ i 1)))
    (Info-goto-node target)))

(defun Info-extract-menu-node-name (&optional errmessage multi-line)
  (skip-chars-forward " \t\n")
  (let ((beg (point))
	str i)
    (skip-chars-forward "^:")
    (forward-char 1)
    (setq str
	  (if (looking-at ":")
	      (buffer-substring-no-properties beg (1- (point)))
	    (skip-chars-forward " \t\n")
	    (Info-following-node-name (if multi-line "^.,\t" "^.,\t\n"))))
    (while (setq i (string-match "\n" str i))
      (aset str i ?\ ))
    ;; Collapse multiple spaces.
    (while (string-match "  +" str)
      (setq str (replace-match " " t t str)))
    str))

;; No one calls this.
;;(defun Info-menu-item-sequence (list)
;;  (while list
;;    (Info-menu (car list))
;;    (setq list (cdr list))))

(defun Info-complete-menu-item (string predicate action)
  (let ((case-fold-search t))
    (cond ((eq action nil)
	   (let (completions
		 (pattern (concat "\n\\* \\("
				  (regexp-quote string)
				  "[^:\t\n]*\\):")))
	     (save-excursion
	       (set-buffer Info-complete-menu-buffer)
	       (goto-char (point-min))
	       (search-forward "\n* Menu:")
	       (while (re-search-forward pattern nil t)
		 (setq completions (cons (cons (format "%s"
						       (buffer-substring
							(match-beginning 1)
							(match-end 1)))
					       (match-beginning 1))
					 completions))))
	     (try-completion string completions predicate)))
	  ((eq action t)
	   (let (completions
		 (pattern (concat "\n\\* \\("
				  (regexp-quote string)
				  "[^:\t\n]*\\):")))
	     (save-excursion
	       (set-buffer Info-complete-menu-buffer)
	       (goto-char (point-min))
	       (search-forward "\n* Menu:")
	       (while (re-search-forward pattern nil t)
		 (setq completions (cons (cons (format "%s"
						       (buffer-substring
							(match-beginning 1)
							(match-end 1)))
					       (match-beginning 1))
					 completions))))
	     (all-completions string completions predicate)))
	  (t
	   (save-excursion
	     (set-buffer Info-complete-menu-buffer)
	     (goto-char (point-min))
	     (search-forward "\n* Menu:")
	     (re-search-forward (concat "\n\\* "
					(regexp-quote string)
					":")
				nil t))))))


(defun Info-menu (menu-item)
  "Go to node for menu item named (or abbreviated) NAME.
Completion is allowed, and the menu item point is on is the default."
  (interactive
   (let ((completions '())
	 ;; If point is within a menu item, use that item as the default
	 (default nil)
	 (p (point))
	 beg
	 (last nil))
     (save-excursion
       (goto-char (point-min))
       (if (not (search-forward "\n* menu:" nil t))
	   (error "No menu in this node"))
       (setq beg (point))
       (and (< (point) p)
	    (save-excursion
	      (goto-char p)
	      (end-of-line)
	      (re-search-backward "\n\\* \\([^:\t\n]*\\):" beg t)
	      (setq default (format "%s" (buffer-substring
					  (match-beginning 1)
					  (match-end 1)))))))
     (let ((item nil))
       (while (null item)
	 (setq item (let ((completion-ignore-case t)
			  (Info-complete-menu-buffer (current-buffer)))
		      (completing-read (if default
					   (format "Menu item (default %s): "
						   default)
					   "Menu item: ")
				       'Info-complete-menu-item nil t)))
	 ;; we rely on the fact that completing-read accepts an input
	 ;; of "" even when the require-match argument is true and ""
	 ;; is not a valid possibility
	 (if (string= item "")
	     (if default
		 (setq item default)
	         ;; ask again
	         (setq item nil))))
       (list item))))