+2006-03-14 Bill Wohler <wohler@newt.com>
+
+ * mh-compat.el (mh-image-load-path-for-library): Incorporate
+ changes from image-load-path-for-library, which are:
+ (image-load-path-for-library): Pass value of path rather than
+ symbol. Always return list of directories. Guarantee that image
+ directory comes first.
+
+ * mh-e.el (image-load-path): Define on those Emacsen that lack it
+ to avoid compile and run-time errors.
+
+ * mh-folder.el (mh-folder-mode): Use new idiom for setting
+ image-load-path.
+
+ * mh-letter.el (mh-letter-mode): Ditto.
+
+ * mh-utils.el (mh-logo-display): Ditto.
+
2006-03-12 Bill Wohler <wohler@newt.com>
* mh-utils.el (mh-folder-list): Fix docstring (closes SF
image-load-path-for-library (library image &optional path no-error)
"Return a suitable search path for images relative to LIBRARY.
-Images for LIBRARY are searched for in \"../../etc/images\" and
-\"../etc/images\" relative to the files in \"lisp/LIBRARY\" as
-well as in `image-load-path' and `load-path'.
+First it searches for IMAGE in a path suitable for LIBRARY, which
+includes \"../../etc/images\" and \"../etc/images\" relative to
+the library file itself, followed by `image-load-path' and
+`load-path'.
-This function returns the value of `load-path' augmented with the
-directory containing IMAGE. If PATH is given, it is used instead
-of `load-path'. If PATH is t, just return the directory that
-contains IMAGE.
+Then this function returns a list of directories which contains
+first the directory in which IMAGE was found, followed by the
+value of `load-path'. If PATH is given, it is used instead of
+`load-path'.
-If NO-ERROR is non-nil, return nil if a suitable path can't be
-found rather than signaling an error.
+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':
- (let ((load-path
- (image-load-path-for-library \"mh-e\" \"mh-logo.xpm\"))
- (image-load-path
- (image-load-path-for-library \"mh-e\" \"mh-logo.xpm\" 'image-load-path)))
- (mh-tool-bar-folder-buttons-init))
+ ;; Avoid errors on Emacsen without `image-load-path'.
+ (if (not (boundp 'image-load-path)) (defvar image-load-path nil))
-This function is used by Emacs versions that don't have
-`image-load-path-for-library'."
+ (let* ((load-path (image-load-path-for-library \"mh-e\" \"mh-logo.xpm\"))
+ (image-load-path (cons (car 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))
dir (expand-file-name "../" dir)))
(setq image-directory dir)))))
(no-error
- ;; In this case we will return nil.
(message "Could not find image %s for library %s" image library))
(t
(error "Could not find image %s for library %s" image library)))
- ;; Return the directory, nil if no-error was non-nil and a
- ;; suitable path could not be found, or an augmented
- ;; `image-load-path' or `load-path'.
- (cond ((or (null image-directory)
- (eq path t))
- image-directory)
- ((and path (symbolp path))
- (nconc (list image-directory)
- (delete image-directory
- (if (boundp path)
- (copy-sequence (symbol-value path))
- nil))))
- (t
- (nconc (list image-directory)
- (delete image-directory (copy-sequence load-path)))))))
+ ;; Return an augmented `path' or `load-path'.
+ (nconc (list image-directory)
+ (delete image-directory (copy-sequence (or path load-path))))))
(mh-defun-compat mh-image-search-load-path
image-search-load-path (file &optional path)
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