;;; hide-ifdef-mode.el --- hides selected code within ifdef.
-;;; Copyright (C) 1988 Free Software Foundation, Inc.
+;;; Copyright (C) 1988, 1994 Free Software Foundation, Inc.
;; Author: Dan LaLiberte <liberte@a.cs.uiuc.edu>
+;; Maintainer: FSF
;; Keywords: c
;; This file is part of GNU Emacs.
;;; Code:
+(defvar hide-ifdef-mode-submap nil
+ "Keymap used with Hide-Ifdef mode.")
+
(defvar hide-ifdef-mode-map nil
- "Keymap used with Hide-Ifdef mode")
+ "Keymap used with Hide-Ifdef mode.")
(defconst hide-ifdef-mode-prefix-key "\C-c"
"Prefix key for all Hide-Ifdef mode commands.")
-(defvar hide-ifdef-mode-map-before nil
- "Buffer-local variable to store a copy of the local keymap
-before `hide-ifdef-mode' modifies it.")
-
-(defun define-hide-ifdef-mode-map ()
- (if hide-ifdef-mode-map
- () ; dont redefine it.
- (setq hide-ifdef-mode-map (make-sparse-keymap))
- (define-key hide-ifdef-mode-map "\ed" 'hide-ifdef-define)
- (define-key hide-ifdef-mode-map "\eu" 'hide-ifdef-undef)
- (define-key hide-ifdef-mode-map "\eD" 'hide-ifdef-set-define-alist)
- (define-key hide-ifdef-mode-map "\eU" 'hide-ifdef-use-define-alist)
-
- (define-key hide-ifdef-mode-map "\eh" 'hide-ifdefs)
- (define-key hide-ifdef-mode-map "\es" 'show-ifdefs)
- (define-key hide-ifdef-mode-map "\C-h" 'hide-ifdef-block)
- (define-key hide-ifdef-mode-map "\C-s" 'show-ifdef-block)
-
- (define-key hide-ifdef-mode-map "\C-f" 'forward-ifdef)
- (define-key hide-ifdef-mode-map "\C-b" 'backward-ifdef)
- (define-key hide-ifdef-mode-map "\C-d" 'down-ifdef)
- (define-key hide-ifdef-mode-map "\C-u" 'up-ifdef)
- (define-key hide-ifdef-mode-map "\C-n" 'next-ifdef)
- (define-key hide-ifdef-mode-map "\C-p" 'previous-ifdef)
- (define-key hide-ifdef-mode-map "\C-q" 'hide-ifdef-toggle-read-only)
- (let ((where (where-is-internal 'toggle-read-only nil nil t)))
- (if where
- (define-key hide-ifdef-mode-map
- where
- 'hide-ifdef-toggle-outside-read-only)))
- )
- (fset 'hide-ifdef-mode-map hide-ifdef-mode-map) ; the function is the map
+;; Set up the submap that goes after the prefix key.
+(if hide-ifdef-mode-submap
+ () ; dont redefine it.
+ (setq hide-ifdef-mode-submap (make-sparse-keymap))
+ (define-key hide-ifdef-mode-submap "\ed" 'hide-ifdef-define)
+ (define-key hide-ifdef-mode-submap "\eu" 'hide-ifdef-undef)
+ (define-key hide-ifdef-mode-submap "\eD" 'hide-ifdef-set-define-alist)
+ (define-key hide-ifdef-mode-submap "\eU" 'hide-ifdef-use-define-alist)
+
+ (define-key hide-ifdef-mode-submap "\eh" 'hide-ifdefs)
+ (define-key hide-ifdef-mode-submap "\es" 'show-ifdefs)
+ (define-key hide-ifdef-mode-submap "\C-d" 'hide-ifdef-block)
+ (define-key hide-ifdef-mode-submap "\C-s" 'show-ifdef-block)
+
+ (define-key hide-ifdef-mode-submap "\C-q" 'hide-ifdef-toggle-read-only)
+ (let ((where (where-is-internal 'toggle-read-only '(keymap) t)))
+ (if where
+ (define-key hide-ifdef-mode-submap
+ where
+ 'hide-ifdef-toggle-outside-read-only)))
)
+;; Set up the mode's main map, which leads via the prefix key to the submap.
+(if hide-ifdef-mode-map
+ ()
+ (setq hide-ifdef-mode-map (make-sparse-keymap))
+ (define-key hide-ifdef-mode-map hide-ifdef-mode-prefix-key
+ hide-ifdef-mode-submap))
+
(defun hif-update-mode-line ()
"Update mode-line by setting buffer-modified to itself."
(set-buffer-modified-p (buffer-modified-p)))
(defvar hide-ifdef-mode nil
- "non-nil when hide-ifdef-mode is activated.")
+ "Non-nil when hide-ifdef-mode is activated.")
(defvar hide-ifdef-hiding nil
- "non-nil when text may be hidden.")
+ "Non-nil when text may be hidden.")
+
+;; Arrange to use the mode's map when the mode is enabled.
+(or (assq 'hide-ifdef-mode minor-mode-map-alist)
+ (setq minor-mode-map-alist
+ (cons (cons hide-ifdef-mode hide-ifdef-mode-map)
+ minor-mode-map-alist)))
(or (assq 'hide-ifdef-hiding minor-mode-alist)
(setq minor-mode-alist
(not hide-ifdef-mode)
(> (prefix-numeric-value arg) 0)))
- (hif-update-mode-line)
+ (force-mode-line-update)
(if hide-ifdef-mode
(progn
(make-local-variable 'hif-outside-read-only)
(setq hif-outside-read-only buffer-read-only)
- (make-local-variable 'hide-ifdef-mode-map-before)
- (setq hide-ifdef-mode-map-before (current-local-map))
- (use-local-map (copy-keymap (current-local-map)))
- (local-unset-key hide-ifdef-mode-prefix-key)
- (local-set-key hide-ifdef-mode-prefix-key 'hide-ifdef-mode-map)
- (define-hide-ifdef-mode-map)
-
(run-hooks 'hide-ifdef-mode-hook)
(if hide-ifdef-initially
; else end hide-ifdef-mode
(if hide-ifdef-hiding
(show-ifdefs))
- (use-local-map hide-ifdef-mode-map-before)
(message "Exit hide-ifdef-mode.")
))
(hide-ifdef-mode 1)) ; turn on hide-ifdef-mode
(if hide-ifdef-hiding
(show-ifdefs)) ; Otherwise, deep confusion.
- (if buffer-read-only (toggle-read-only)) ; make it writable temporarily
- (setq selective-display t)
- (setq hide-ifdef-hiding t)
- (hide-ifdef-guts)
- (if (or hide-ifdef-read-only hif-outside-read-only)
- (toggle-read-only)) ; make it read only
+ (let ((inhibit-read-only t))
+ (setq selective-display t)
+ (setq hide-ifdef-hiding t)
+ (hide-ifdef-guts))
+ (setq buffer-read-only (or hide-ifdef-read-only hif-outside-read-only))
(message "Hiding done"))
(defun show-ifdefs ()
"Cancel the effects of `hide-ifdef'. The contents of all #ifdefs is shown."
(interactive)
- (if buffer-read-only (toggle-read-only)) ; make it writable temporarily
+ (setq buffer-read-only hif-outside-read-only)
(setq selective-display nil) ; defaults
- (hif-show-all)
- (if hif-outside-read-only
- (toggle-read-only)) ; make it read only
+ (let ((inhibit-read-only t))
+ (hif-show-all))
(setq hide-ifdef-hiding nil))
(interactive)
(if (not hide-ifdef-mode)
(hide-ifdef-mode 1))
- (if buffer-read-only (toggle-read-only))
(setq selective-display t)
- (let (top bottom)
+ (let (top bottom (inhibit-read-only t))
(hif-find-ifdef-block) ; set top and bottom - dynamic scoping
(hide-ifdef-region top bottom)
(if hide-ifdef-lines
(hif-hide-line top)
(hif-hide-line (1+ bottom))))
(setq hide-ifdef-hiding t))
- (if (or hide-ifdef-read-only hif-outside-read-only)
- (toggle-read-only)))
+ (setq buffer-read-only (or hide-ifdef-read-only hif-outside-read-only)))
(defun show-ifdef-block ()
"Show the ifdef block (true or false part) enclosing or before the cursor."
(interactive)
- (let ((old-read-only buffer-read-only))
- (if old-read-only (toggle-read-only))
+ (let ((inhibit-read-only t))
(if hide-ifdef-lines
(save-excursion
(beginning-of-line)
(let (top bottom)
(hif-find-ifdef-block)
- (hif-show-ifdef-region (1- top) bottom))
- )
-
- ; restore read only status since we dont know if all is shown.
- (if old-read-only (toggle-read-only))))
+ (hif-show-ifdef-region (1- top) bottom)))))
;;; definition alist support