-This function returns value of `load-path' augmented with the
-path to IMAGE. If PATH is given, it is used instead of
-`load-path'."
- (unless library (error "No library specified."))
- (unless image (error "No image specified."))
- (cond (gmm-image-load-path) ;; User setting exists.
- ((let (gmm-library-name d1ei d2ei)
- ;; Try relative setting
- ;; First, find library in the load-path.
- (setq gmm-library-name (locate-library library))
- (if (not gmm-library-name)
- (error "Cannot find library `%s' in load-path" library))
- ;; And then set gmm-image-load-path relative to that.
- (setq
- ;; Go down 2 levels...
- d2ei (expand-file-name
- (concat (file-name-directory gmm-library-name)
- "../../etc/images"))
- ;; Go down 1 level...
- d1ei (expand-file-name
- (concat (file-name-directory gmm-library-name)
- "../etc/images")))
- (setq gmm-image-load-path
- ;; Set it to nil if image is not found...
- (cond ((file-exists-p (expand-file-name image d2ei)) d2ei)
- ((file-exists-p (expand-file-name image d1ei)) d1ei)))))
- ((let ((img image)
- (dir (or
- ;; Images in image-load-path.
- (gmm-image-search-load-path image)
- ;; Images in load-path.
- (locate-library image)))
- parent)
- (and dir
- (setq dir (file-name-directory dir))
- (progn
- ;; Remove subdirectories.
- (while (setq parent (file-name-directory img))
- (setq img (directory-file-name parent)
- dir (expand-file-name "../" dir)))
- (setq gmm-image-load-path dir))))))
- ;;
- (unless (file-exists-p gmm-image-load-path)
- (error "Directory `%s' in gmm-image-load-path does not exist"
- gmm-image-load-path))
- (unless (file-exists-p (expand-file-name image gmm-image-load-path))
- (error "Directory `%s' in gmm-image-load-path does not contain image `%s'."
- gmm-image-load-path image))
- ;; Return augmented `image-load-path' or `load-path'.
- (cond ((and path (symbolp path))
- (nconc (list gmm-image-load-path)
- (delete gmm-image-load-path
- (if (boundp path)
- (copy-sequence (symbol-value path))
- nil))))
- (t
- (nconc (list gmm-image-load-path)
- (delete gmm-image-load-path
- (copy-sequence load-path))))))
+If NO-ERROR is non-nil and a suitable path can't be found, don't
+signal an error. Instead, return a list of directories as before,
+except that nil appears in place of the image directory.
+
+Here is an example that uses a common idiom to provide
+compatibility with versions of Emacs that lack the variable
+`image-load-path':
+
+ ;; Shush compiler.
+ (defvar image-load-path)
+
+ (let* ((load-path (image-load-path-for-library \"mh-e\" \"mh-logo.xpm\"))
+ (image-load-path (cons (car load-path)
+ (when (boundp 'image-load-path)
+ image-load-path))))
+ (mh-tool-bar-folder-buttons-init))"
+ (unless library (error "No library specified"))
+ (unless image (error "No image specified"))
+ (let (image-directory image-directory-load-path)
+ ;; Check for images in image-load-path or load-path.
+ (let ((img image)
+ (dir (or
+ ;; Images in image-load-path.
+ (gmm-image-search-load-path image) ;; "gmm-" prefix!
+ ;; Images in load-path.
+ (locate-library image)))
+ parent)
+ ;; Since the image might be in a nested directory (for
+ ;; example, mail/attach.pbm), adjust `image-directory'
+ ;; accordingly.
+ (when dir
+ (setq dir (file-name-directory dir))
+ (while (setq parent (file-name-directory img))
+ (setq img (directory-file-name parent)
+ dir (expand-file-name "../" dir))))
+ (setq image-directory-load-path dir))
+
+ ;; If `image-directory-load-path' isn't Emacs' image directory,
+ ;; it's probably a user preference, so use it. Then use a
+ ;; relative setting if possible; otherwise, use
+ ;; `image-directory-load-path'.
+ (cond
+ ;; User-modified image-load-path?
+ ((and image-directory-load-path
+ (not (equal image-directory-load-path
+ (file-name-as-directory
+ (expand-file-name "images" data-directory)))))
+ (setq image-directory image-directory-load-path))
+ ;; Try relative setting.
+ ((let (library-name d1ei d2ei)
+ ;; First, find library in the load-path.
+ (setq library-name (locate-library library))
+ (if (not library-name)
+ (error "Cannot find library %s in load-path" library))
+ ;; And then set image-directory relative to that.
+ (setq
+ ;; Go down 2 levels.
+ d2ei (file-name-as-directory
+ (expand-file-name
+ (concat (file-name-directory library-name) "../../etc/images")))
+ ;; Go down 1 level.
+ d1ei (file-name-as-directory
+ (expand-file-name
+ (concat (file-name-directory library-name) "../etc/images"))))
+ (setq image-directory
+ ;; Set it to nil if image is not found.
+ (cond ((file-exists-p (expand-file-name image d2ei)) d2ei)
+ ((file-exists-p (expand-file-name image d1ei)) d1ei)))))
+ ;; Use Emacs' image directory.
+ (image-directory-load-path
+ (setq image-directory image-directory-load-path))
+ (no-error
+ (message "Could not find image %s for library %s" image library))
+ (t
+ (error "Could not find image %s for library %s" image library)))
+
+ ;; Return an augmented `path' or `load-path'.
+ (nconc (list image-directory)
+ (delete image-directory (copy-sequence (or path load-path))))))
+
+(defun gmm-customize-mode (&optional mode)
+ "Customize customization group for MODE.
+If mode is nil, use `major-mode' of the current buffer."
+ (interactive)
+ (customize-group
+ (or mode
+ (intern (let ((mode (symbol-name major-mode)))
+ (string-match "^\\(.+\\)-mode$" mode)
+ (match-string 1 mode))))))
+
+(defun gmm-write-region (start end filename &optional append visit
+ lockname mustbenew)
+ "Compatibility function for `write-region'.
+
+In XEmacs, the seventh argument of `write-region' specifies the
+coding-system."
+ (if (and mustbenew
+ (or (featurep 'xemacs)
+ (= emacs-major-version 20)))
+ (if (file-exists-p filename)
+ (signal 'file-already-exists
+ (list "File exists" filename))
+ (write-region start end filename append visit lockname))
+ (write-region start end filename append visit lockname mustbenew)))