*** empty log message ***

[bpt/emacs.git] / lisp / image.el

diff --git a/lisp/image.el b/lisp/image.el
index d111f7e..c824b18 100644 (file)
--- a/lisp/image.el
+++ b/lisp/image.el
@@ -34,7 +34,7 @@
 
 
 (defconst image-type-header-regexps
-  '(("\\`/[\t\n\r ]*\\*.*XPM.\\*/" . xpm)
+  `(("\\`/[\t\n\r ]*\\*.*XPM.\\*/" . xpm)
     ("\\`P[1-6][[:space:]]+\\(?:#.*[[:space:]]+\\)*[0-9]+[[:space:]]+[0-9]+" . pbm)
     ("\\`GIF8[79]a" . gif)
     ("\\`\x89PNG\r\n\x1a\n" . png)
@@ -43,7 +43,15 @@
 static char \\1_bits" . xbm)
     ("\\`\\(?:MM\0\\*\\|II\\*\0\\)" . tiff)
     ("\\`[\t\n\r ]*%!PS" . postscript)
-    ("\\`\xff\xd8" . (image-jpeg-p . jpeg)))
+    ("\\`\xff\xd8" . (image-jpeg-p . jpeg))
+    (,(let* ((incomment-re "\\(?:[^-]\\|-[^-]\\)")
+            (comment-re (concat "\\(?:!--" incomment-re "*-->[ \t\r\n]*<\\)")))
+       (concat "\\(?:<\\?xml[ \t\r\n]+[^>]*>\\)?[ \t\r\n]*<"
+               comment-re "*"
+               "\\(?:!DOCTYPE[ \t\r\n]+[^>]*>[ \t\r\n]*<[ \t\r\n]*" comment-re "*\\)?"
+               "[Ss][Vv][Gg]"))
+     . svg)
+    )
   "Alist of (REGEXP . IMAGE-TYPE) pairs used to auto-detect image types.
 When the first bytes of an image file match REGEXP, it is assumed to
 be of image type IMAGE-TYPE if IMAGE-TYPE is a symbol.  If not a symbol,
@@ -60,7 +68,9 @@ a non-nil value, TYPE is the image's type.")
     ("\\.pbm\\'" . pbm)
     ("\\.xbm\\'" . xbm)
     ("\\.ps\\'" . postscript)
-    ("\\.tiff?\\'" . tiff))
+    ("\\.tiff?\\'" . tiff)
+    ("\\.svgz?\\'" . svg)
+    )
   "Alist of (REGEXP . IMAGE-TYPE) pairs used to identify image files.
 When the name of an image file match REGEXP, it is assumed to
 be of image type IMAGE-TYPE.")
@@ -77,6 +87,7 @@ be of image type IMAGE-TYPE.")
     (xpm . nil)
     (jpeg . maybe)
     (tiff . maybe)
+    (svg . maybe)
     (postscript . nil))
   "Alist of (IMAGE-TYPE . AUTODETECT) pairs used to auto-detect image files.
 \(See `image-type-auto-detected-p').
@@ -292,33 +303,26 @@ be determined."
   "Determine the type of image file FILE from its name.
 Value is a symbol specifying the image type, or nil if type cannot
 be determined."
-  (let ((types image-type-file-name-regexps)
-       type)
-    (while types
-      (if (string-match (car (car types)) file)
-         (setq type (cdr (car types))
-               types nil)
-       (setq types (cdr types))))
-    type))
+  (assoc-default file image-type-file-name-regexps 'string-match))
 
 
 ;;;###autoload
-(defun image-type (file-or-data &optional type data-p)
+(defun image-type (source &optional type data-p)
   "Determine and return image type.
-FILE-OR-DATA is an image file name or image data.
+SOURCE is an image file name or image data.
 Optional TYPE is a symbol describing the image type.  If TYPE is omitted
 or nil, try to determine the image type from its first few bytes
-of image data.  If that doesn't work, and FILE-OR-DATA is a file name,
+of image data.  If that doesn't work, and SOURCE is a file name,
 use its file extension as image type.
-Optional DATA-P non-nil means FILE-OR-DATA is a string containing image data."
-  (when (and (not data-p) (not (stringp file-or-data)))
-    (error "Invalid image file name `%s'" file-or-data))
+Optional DATA-P non-nil means SOURCE is a string containing image data."
+  (when (and (not data-p) (not (stringp source)))
+    (error "Invalid image file name `%s'" source))
   (unless type
-    (setq type (if data-p 
-                   (image-type-from-data file-or-data)
-                 (or (image-type-from-file-header file-or-data)
-                     (image-type-from-file-name file-or-data))))
-    (or type(error "Cannot determine image type")))
+    (setq type (if data-p
+                  (image-type-from-data source)
+                (or (image-type-from-file-header source)
+                    (image-type-from-file-name source))))
+    (or type (error "Cannot determine image type")))
   (or (memq type (and (boundp 'image-types) image-types))
       (error "Invalid image type `%s'" type))
   type)
@@ -339,7 +343,9 @@ This function is intended to be used from `magic-fallback-mode-alist'.
 
 The buffer is considered to contain an auto-detectable image if
 its beginning matches an image type in `image-type-header-regexps',
-and that image type is present in `image-type-auto-detectable'."
+and that image type is present in `image-type-auto-detectable' with a
+non-nil value.  If that value is non-nil, but not t, then the image type
+must be available."
   (let* ((type (image-type-from-buffer))
         (auto (and type (cdr (assq type image-type-auto-detectable)))))
     (and auto
@@ -359,7 +365,12 @@ Optional PROPS are additional image attributes to assign to the image,
 like, e.g. `:mask MASK'.
 Value is the image created, or nil if images of type TYPE are not supported.
 
-Images should not be larger than specified by `max-image-size'."
+Images should not be larger than specified by `max-image-size'.
+
+Image file names that are not absolute are searched for in the
+\"images\" sub-directory of `data-directory' and
+`x-bitmap-file-path' (in that order)."
+  ;; It is x_find_image_file in image.c that sets the search path.
   (setq type (image-type file-or-data type data-p))
   (when (image-type-available-p type)
     (append (list 'image :type type (if data-p :data :file) file-or-data)