X-Git-Url: http://cgit.sxemacs.org/?p=gnus;a=blobdiff_plain;f=lisp%2Fshr.el;h=ba1ca1b380b7ebb6da22654a593efb88127085c9;hp=588b0e2cf1a0dad58420bef97d57a703c0fb59e9;hb=0083071bc8c341265712e48a4cd128d280fbec94;hpb=8ecd8a22b45347aadc240489f1506c0effe02ca9

diff --git a/lisp/shr.el b/lisp/shr.el
index 588b0e2cf..ba1ca1b38 100644
--- a/lisp/shr.el
+++ b/lisp/shr.el
@@ -1,6 +1,6 @@
 ;;; shr.el --- Simple HTML Renderer
 
-;; Copyright (C) 2010-2011 Free Software Foundation, Inc.
+;; Copyright (C) 2010-2012 Free Software Foundation, Inc.
 
 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
 ;; Keywords: html
@@ -35,6 +35,7 @@
 
 (defgroup shr nil
   "Simple HTML Renderer"
+  :version "24.1"
   :group 'mail)
 
 (defcustom shr-max-image-proportion 0.9
@@ -53,17 +54,17 @@ fit these criteria."
   :group 'shr
   :type 'regexp)
 
-(defcustom shr-table-horizontal-line ? 
+(defcustom shr-table-horizontal-line ?\s
   "Character used to draw horizontal table lines."
   :group 'shr
   :type 'character)
 
-(defcustom shr-table-vertical-line ? 
+(defcustom shr-table-vertical-line ?\s
   "Character used to draw vertical table lines."
   :group 'shr
   :type 'character)
 
-(defcustom shr-table-corner ? 
+(defcustom shr-table-corner ?\s
   "Character used to draw table corners."
   :group 'shr
   :type 'character)
@@ -118,6 +119,7 @@ cid: URL as the argument.")
   (let ((map (make-sparse-keymap)))
     (define-key map "a" 'shr-show-alt-text)
     (define-key map "i" 'shr-browse-image)
+    (define-key map "z" 'shr-zoom-image)
     (define-key map "I" 'shr-insert-image)
     (define-key map "u" 'shr-copy-url)
     (define-key map "v" 'shr-browse-url)
@@ -128,22 +130,42 @@ cid: URL as the argument.")
 ;; Public functions and commands.
 
 (defun shr-visit-file (file)
+  "Parse FILE as an HTML document, and render it in a new buffer."
   (interactive "fHTML file name: ")
   (pop-to-buffer "*html*")
   (erase-buffer)
   (shr-insert-document
    (with-temp-buffer
      (insert-file-contents file)
-     (libxml-parse-html-region (point-min) (point-max)))))
+     (libxml-parse-html-region (point-min) (point-max))))
+  (goto-char (point-min)))
 
 ;;;###autoload
 (defun shr-insert-document (dom)
+  "Render the parsed document DOM into the current buffer.
+DOM should be a parse tree as generated by
+`libxml-parse-html-region' or similar."
   (setq shr-content-cache nil)
-  (let ((shr-state nil)
+  (let ((start (point))
+	(shr-state nil)
 	(shr-start nil)
 	(shr-base nil)
 	(shr-width (or shr-width (window-width))))
-    (shr-descend (shr-transform-dom dom))))
+    (shr-descend (shr-transform-dom dom))
+    (shr-remove-trailing-whitespace start (point))))
+
+(defun shr-remove-trailing-whitespace (start end)
+  (let ((width (window-width)))
+    (save-restriction
+      (narrow-to-region start end)
+      (goto-char start)
+      (while (not (eobp))
+	(end-of-line)
+	(when (> (shr-previous-newline-padding-width (current-column)) width)
+	  (dolist (overlay (overlays-at (point)))
+	    (when (overlay-get overlay 'before-string)
+	      (overlay-put overlay 'before-string nil))))
+	(forward-line 1)))))
 
 (defun shr-copy-url ()
   "Copy the URL under point to the kill ring.
@@ -168,7 +190,8 @@ redirects somewhere else."
 	     (when (re-search-forward ".utm_.*" nil t)
 	       (replace-match "" t t))
 	     (message "Copied %s" (buffer-string))
-	     (copy-region-as-kill (point-min) (point-max)))))))
+	     (copy-region-as-kill (point-min) (point-max)))))
+       nil t))
      ;; Copy the URL to the kill ring.
      (t
       (with-temp-buffer
@@ -211,6 +234,40 @@ the URL of the image to the kill buffer instead."
       (message "Inserting %s..." url)
       (url-retrieve url 'shr-image-fetched
 		    (list (current-buffer) (1- (point)) (point-marker))
+		    t t))))
+
+(defun shr-zoom-image ()
+  "Toggle the image size.
+The size will be rotated between the default size, the original
+size, and full-buffer size."
+  (interactive)
+  (let ((url (get-text-property (point) 'image-url))
+	(size (get-text-property (point) 'image-size))
+	(buffer-read-only nil))
+    (if (not url)
+	(message "No image under point")
+      ;; Delete the old picture.
+      (while (get-text-property (point) 'image-url)
+	(forward-char -1))
+      (forward-char 1)
+      (let ((start (point)))
+	(while (get-text-property (point) 'image-url)
+	  (forward-char 1))
+	(forward-char -1)
+	(put-text-property start (point) 'display nil)
+	(when (> (- (point) start) 2)
+	  (delete-region start (1- (point)))))
+      (message "Inserting %s..." url)
+      (url-retrieve url 'shr-image-fetched
+		    (list (current-buffer) (1- (point)) (point-marker)
+			  (list (cons 'size
+				      (cond ((or (eq size 'default)
+						 (null size))
+					     'original)
+					    ((eq size 'original)
+					     'full)
+					    ((eq size 'full)
+					     'default)))))
 		    t))))
 
 ;;; Utility functions.
@@ -276,6 +333,7 @@ the URL of the image to the kill buffer instead."
 
 (defun shr-insert (text)
   (when (and (eq shr-state 'image)
+	     (not (bolp))
 	     (not (string-match "\\`[ \t\n]+\\'" text)))
     (insert "\n")
     (setq shr-state nil))
@@ -283,11 +341,11 @@ the URL of the image to the kill buffer instead."
    ((eq shr-folding-mode 'none)
     (insert text))
    (t
-    (when (and (string-match "\\`[ \t\n]" text)
+    (when (and (string-match "\\`[ \t\n ]" text)
 	       (not (bolp))
 	       (not (eq (char-after (1- (point))) ? )))
       (insert " "))
-    (dolist (elem (split-string text))
+    (dolist (elem (split-string text "[ \f\t\n\r\v ]+" t))
       (when (and (bolp)
 		 (> shr-indentation 0))
 	(shr-indent))
@@ -310,6 +368,7 @@ the URL of the image to the kill buffer instead."
       (unless shr-start
 	(setq shr-start (point)))
       (insert elem)
+      (setq shr-state nil)
       (let (found)
 	(while (and (> (current-column) shr-width)
 		    (progn
@@ -319,7 +378,6 @@ the URL of the image to the kill buffer instead."
 	    (delete-char -1))
 	  (insert "\n")
 	  (unless found
-	    (put-text-property (1- (point)) (point) 'shr-break t)
 	    ;; No space is needed at the beginning of a line.
 	    (when (eq (following-char) ? )
 	      (delete-char 1)))
@@ -327,7 +385,7 @@ the URL of the image to the kill buffer instead."
 	    (shr-indent))
 	  (end-of-line))
 	(insert " ")))
-    (unless (string-match "[ \t\n]\\'" text)
+    (unless (string-match "[ \t\n ]\\'" text)
       (delete-char -1)))))
 
 (defun shr-find-fill-point ()
@@ -479,7 +537,7 @@ the URL of the image to the kill buffer instead."
      ((not url)
       (message "No link under point"))
      ((string-match "^mailto:" url)
-      (browse-url-mailto url))
+      (browse-url-mail url))
      (t
       (browse-url url)))))
 
@@ -490,7 +548,8 @@ the URL of the image to the kill buffer instead."
     (if (not url)
 	(message "No link under point")
       (url-retrieve (shr-encode-url url)
-		    'shr-store-contents (list url directory)))))
+		    'shr-store-contents (list url directory)
+		    nil t))))
 
 (defun shr-store-contents (status url directory)
   (unless (plist-get status :error)
@@ -500,72 +559,97 @@ the URL of the image to the kill buffer instead."
 		    (expand-file-name (file-name-nondirectory url)
 				      directory)))))
 
-(defun shr-image-fetched (status buffer start end)
-  (when (and (buffer-name buffer)
-	     (not (plist-get status :error)))
-    (url-store-in-cache (current-buffer))
-    (when (or (search-forward "\n\n" nil t)
-	      (search-forward "\r\n\r\n" nil t))
-      (let ((data (buffer-substring (point) (point-max))))
-        (with-current-buffer buffer
-	  (save-excursion
-	    (let ((alt (buffer-substring start end))
-		  (inhibit-read-only t))
-	      (delete-region start end)
-	      (goto-char start)
-	      (funcall shr-put-image-function data alt)))))))
-  (kill-buffer (current-buffer)))
-
-(defun shr-put-image (data alt)
+(defun shr-image-fetched (status buffer start end &optional flags)
+  (let ((image-buffer (current-buffer)))
+    (when (and (buffer-name buffer)
+	       (not (plist-get status :error)))
+      (url-store-in-cache image-buffer)
+      (when (or (search-forward "\n\n" nil t)
+		(search-forward "\r\n\r\n" nil t))
+	(let ((data (buffer-substring (point) (point-max))))
+	  (with-current-buffer buffer
+	    (save-excursion
+	      (let ((alt (buffer-substring start end))
+		    (properties (text-properties-at start))
+		    (inhibit-read-only t))
+		(delete-region start end)
+		(goto-char start)
+		(funcall shr-put-image-function data alt flags)
+		(while properties
+		  (let ((type (pop properties))
+			(value (pop properties)))
+		    (unless (memq type '(display image-size))
+		      (put-text-property start (point) type value))))))))))
+    (kill-buffer image-buffer)))
+
+(defun shr-put-image (data alt &optional flags)
   "Put image DATA with a string ALT.  Return image."
   (if (display-graphic-p)
-      (let ((image (ignore-errors
-                     (shr-rescale-image data))))
+      (let* ((size (cdr (assq 'size flags)))
+	     (start (point))
+	     (image (cond
+		     ((eq size 'original)
+		      (create-image data nil t :ascent 100))
+		     ((eq size 'full)
+		      (ignore-errors
+			(shr-rescale-image data t)))
+		     (t
+		      (ignore-errors
+			(shr-rescale-image data))))))
         (when image
 	  ;; When inserting big-ish pictures, put them at the
 	  ;; beginning of the line.
 	  (when (and (> (current-column) 0)
 		     (> (car (image-size image t)) 400))
 	    (insert "\n"))
-	  (insert-image image (or alt "*"))
+	  (if (eq size 'original)
+	      (let ((overlays (overlays-at (point))))
+		(insert-sliced-image image (or alt "*") nil 20 1)
+		(dolist (overlay overlays)
+		  (overlay-put overlay 'face 'default)))
+	    (insert-image image (or alt "*")))
+	  (put-text-property start (point) 'image-size size)
 	  (when (image-animated-p image)
 	    (image-animate image nil 60)))
 	image)
     (insert alt)))
 
-(defun shr-rescale-image (data)
-  (if (or (not (fboundp 'imagemagick-types))
-	  (not (get-buffer-window (current-buffer))))
-      (create-image data nil t
-		    :ascent 100)
-    (let* ((image (create-image data nil t :ascent 100))
-	   (size (image-size image t))
-	   (width (car size))
-	   (height (cdr size))
-	   (edges (window-inside-pixel-edges
-		   (get-buffer-window (current-buffer))))
-	   (window-width (truncate (* shr-max-image-proportion
-				      (- (nth 2 edges) (nth 0 edges)))))
-	   (window-height (truncate (* shr-max-image-proportion
-				       (- (nth 3 edges) (nth 1 edges)))))
-	   scaled-image)
-      (when (> height window-height)
-	(setq image (or (create-image data 'imagemagick t
-				      :height window-height)
-			image))
-	(setq size (image-size image t)))
-      (when (> (car size) window-width)
-	(setq image (or
-		     (create-image data 'imagemagick t
-				   :width window-width
-				   :ascent 100)
-		     image)))
-      image)))
+(defun shr-rescale-image (data &optional force)
+  "Rescale DATA, if too big, to fit the current buffer.
+If FORCE, rescale the image anyway."
+  (let ((image (create-image data nil t :ascent 100)))
+    (if (or (not (fboundp 'imagemagick-types))
+	    (not (get-buffer-window (current-buffer))))
+	image
+      (let* ((size (image-size image t))
+	     (width (car size))
+	     (height (cdr size))
+	     (edges (window-inside-pixel-edges
+		     (get-buffer-window (current-buffer))))
+	     (window-width (truncate (* shr-max-image-proportion
+					(- (nth 2 edges) (nth 0 edges)))))
+	     (window-height (truncate (* shr-max-image-proportion
+					 (- (nth 3 edges) (nth 1 edges)))))
+	     scaled-image)
+	(when (or force
+		  (> height window-height))
+	  (setq image (or (create-image data 'imagemagick t
+					:height window-height
+					:ascent 100)
+			  image))
+	  (setq size (image-size image t)))
+	(when (> (car size) window-width)
+	  (setq image (or
+		       (create-image data 'imagemagick t
+				     :width window-width
+				     :ascent 100)
+		       image)))
+	image))))
 
 ;; url-cache-extract autoloads url-cache.
 (declare-function url-cache-create-filename "url-cache" (url))
 (autoload 'mm-disable-multibyte "mm-util")
-(autoload 'browse-url-mailto "browse-url")
+(autoload 'browse-url-mail "browse-url")
 
 (defun shr-get-image-data (url)
   "Get image data for URL.
@@ -597,7 +681,7 @@ START, and END.  Note that START and END should be markers."
 		   (delete-region (point) end))))
 	 (url-retrieve url 'shr-image-fetched
 		       (list (current-buffer) start end)
-		       t)))))
+		       t t)))))
 
 (defun shr-heading (cont &rest types)
   (shr-ensure-paragraph)
@@ -687,7 +771,7 @@ ones, in case fg and bg are nil."
     (forward-line 1)
     (setq end (point))
     (narrow-to-region start end)
-    (let ((width (shr-natural-width))
+    (let ((width (shr-buffer-width))
 	  column)
       (goto-char (point-min))
       (while (not (eobp))
@@ -907,13 +991,10 @@ ones, in case fg and bg are nil."
 	    (let ((file (url-cache-create-filename (shr-encode-url url))))
 	      (when (file-exists-p file)
 		(delete-file file))))
-	  (funcall
-	   (if (fboundp 'url-queue-retrieve)
-	       'url-queue-retrieve
-	     'url-retrieve)
+	  (url-queue-retrieve
 	   (shr-encode-url url) 'shr-image-fetched
 	   (list (current-buffer) start (set-marker (make-marker) (1- (point))))
-	   t)))
+	   t t)))
 	(when (zerop shr-table-depth) ;; We are not in a table.
 	  (put-text-property start (point) 'keymap shr-map)
 	  (put-text-property start (point) 'shr-alt alt)
@@ -963,7 +1044,7 @@ ones, in case fg and bg are nil."
     (shr-generic cont)))
 
 (defun shr-tag-br (cont)
-  (unless (bobp)
+  (unless (bolp)
     (insert "\n")
     (shr-indent))
   (shr-generic cont))
@@ -1027,7 +1108,10 @@ ones, in case fg and bg are nil."
 	 ;; be smaller (if there's little text) or bigger (if there's
 	 ;; unbreakable text).
 	 (sketch (shr-make-table cont suggested-widths))
-	 (sketch-widths (shr-table-widths sketch suggested-widths)))
+	 ;; Compute the "natural" width by setting each column to 500
+	 ;; characters and see how wide they really render.
+	 (natural (shr-make-table cont (make-vector (length columns) 500)))
+	 (sketch-widths (shr-table-widths sketch natural suggested-widths)))
     ;; This probably won't work very well.
     (when (> (+ (loop for width across sketch-widths
 		      summing (1+ width))
@@ -1165,31 +1249,35 @@ ones, in case fg and bg are nil."
 	    shr-table-corner))
   (insert "\n"))
 
-(defun shr-table-widths (table suggested-widths)
+(defun shr-table-widths (table natural-table suggested-widths)
   (let* ((length (length suggested-widths))
 	 (widths (make-vector length 0))
 	 (natural-widths (make-vector length 0)))
     (dolist (row table)
       (let ((i 0))
 	(dolist (column row)
-	  (aset widths i (max (aref widths i)
-			      (car column)))
-	  (aset natural-widths i (max (aref natural-widths i)
-				      (cadr column)))
+	  (aset widths i (max (aref widths i) column))
+	  (setq i (1+ i)))))
+    (dolist (row natural-table)
+      (let ((i 0))
+	(dolist (column row)
+	  (aset natural-widths i (max (aref natural-widths i) column))
 	  (setq i (1+ i)))))
     (let ((extra (- (apply '+ (append suggested-widths nil))
 		    (apply '+ (append widths nil))))
 	  (expanded-columns 0))
+      ;; We have extra, unused space, so divide this space amongst the
+      ;; columns.
       (when (> extra 0)
+	;; If the natural width is wider than the rendered width, we
+	;; want to allow the column to expand.
 	(dotimes (i length)
-	  ;; If the natural width is wider than the rendered width, we
-	  ;; want to allow the column to expand.
 	  (when (> (aref natural-widths i) (aref widths i))
 	    (setq expanded-columns (1+ expanded-columns))))
 	(dotimes (i length)
 	  (when (> (aref natural-widths i) (aref widths i))
 	    (aset widths i (min
-			    (1+ (aref natural-widths i))
+			    (aref natural-widths i)
 			    (+ (/ extra expanded-columns)
 			       (aref widths i))))))))
     widths))
@@ -1244,10 +1332,13 @@ ones, in case fg and bg are nil."
 	  (let ((shr-width width)
 		(shr-indentation 0))
 	    (shr-descend (cons 'td cont)))
+	  ;; Delete padding at the bottom of the TDs.
 	  (delete-region
 	   (point)
-	   (+ (point)
-	      (skip-chars-backward " \t\n")))
+	   (progn
+	     (skip-chars-backward " \t\n")
+	     (end-of-line)
+	     (point)))
 	  (push (list (cons width cont) (buffer-string)
 		      (shr-overlays-in-region (point-min) (point-max)))
 		shr-content-cache)))
@@ -1281,19 +1372,14 @@ ones, in case fg and bg are nil."
 		  (split-string (buffer-string) "\n")
 		  (shr-collect-overlays)
 		  (car actual-colors))
-	  (list max
-		(shr-natural-width)))))))
+	  max)))))
 
-(defun shr-natural-width ()
+(defun shr-buffer-width ()
   (goto-char (point-min))
-  (let ((current 0)
-	(max 0))
+  (let ((max 0))
     (while (not (eobp))
       (end-of-line)
-      (setq current (+ current (current-column)))
-      (unless (get-text-property (point) 'shr-break)
-	(setq max (max max current)
-	      current 0))
+      (setq max (max max (current-column)))
       (forward-line 1))
     max))
 
@@ -1343,10 +1429,10 @@ ones, in case fg and bg are nil."
 	    (when (memq (car column) '(td th))
 	      (let ((width (cdr (assq :width (cdr column)))))
 		(when (and width
-			   (string-match "\\([0-9]+\\)%" width))
-		  (aset columns i
-			(/ (string-to-number (match-string 1 width))
-			   100.0))))
+			   (string-match "\\([0-9]+\\)%" width)
+			   (not (zerop (setq width (string-to-number
+						    (match-string 1 width))))))
+		  (aset columns i (/ width 100.0))))
 	      (setq i (1+ i)))))))
     columns))