X-Git-Url: https://cgit.sxemacs.org/?p=gnus;a=blobdiff_plain;f=lisp%2Fshr.el;h=bacb9d9ee906c97842a730067ced892aa0ae3c96;hp=4a778b892de1ac4afa57345f177b041878630935;hb=76b6b2b0a969b427bb993110f6d8c05060cf5f64;hpb=2596d578acd0e2f3d659b332a866d227010e6ce4

diff --git a/lisp/shr.el b/lisp/shr.el
index 4a778b892..bacb9d9ee 100644
--- a/lisp/shr.el
+++ b/lisp/shr.el
@@ -53,6 +53,7 @@ fit these criteria."
 (defvar shr-folding-mode nil)
 (defvar shr-state nil)
 (defvar shr-start nil)
+(defvar shr-indentation 0)
 
 (defvar shr-width 70)
 
@@ -75,7 +76,7 @@ fit these criteria."
     (shr-descend (shr-transform-dom dom))))
 
 (defun shr-descend (dom)
-  (let ((function (intern (concat "shr-" (symbol-name (car dom))) obarray)))
+  (let ((function (intern (concat "shr-tag-" (symbol-name (car dom))) obarray)))
     (if (fboundp function)
 	(funcall function (cdr dom))
       (shr-generic (cdr dom)))))
@@ -85,37 +86,48 @@ fit these criteria."
     (cond
      ((eq (car sub) :text)
       (shr-insert (cdr sub)))
-     ((consp (cdr sub))
+     ((listp (cdr sub))
       (shr-descend sub)))))
 
-(defun shr-p (cont)
-  (shr-ensure-newline)
-  (insert "\n")
+(defun shr-tag-p (cont)
+  (shr-ensure-paragraph)
   (shr-generic cont)
-  (insert "\n"))
-
-(defun shr-b (cont)
+  (shr-ensure-paragraph))
+
+(defun shr-ensure-paragraph ()
+  (unless (bobp)
+    (if (bolp)
+	(unless (eql (char-after (- (point) 2)) ?\n)
+	  (insert "\n"))
+      (if (save-excursion
+	    (beginning-of-line)
+	    (looking-at " *$"))
+	  (insert "\n")
+	(insert "\n\n")))))
+
+(defun shr-tag-b (cont)
   (shr-fontize-cont cont 'bold))
 
-(defun shr-i (cont)
+(defun shr-tag-i (cont)
   (shr-fontize-cont cont 'italic))
 
-(defun shr-u (cont)
+(defun shr-tag-u (cont)
   (shr-fontize-cont cont 'underline))
 
-(defun shr-s (cont)
-  (shr-fontize-cont cont 'strikethru))
+(defun shr-tag-s (cont)
+  (shr-fontize-cont cont 'strike-through))
 
-(defun shr-fontize-cont (cont type)
+(defun shr-fontize-cont (cont &rest types)
   (let (shr-start)
     (shr-generic cont)
-    (shr-add-font shr-start (point) type)))
+    (dolist (type types)
+      (shr-add-font (or shr-start (point)) (point) type))))
 
 (defun shr-add-font (start end type)
   (let ((overlay (make-overlay start end)))
     (overlay-put overlay 'face type)))
 
-(defun shr-a (cont)
+(defun shr-tag-a (cont)
   (let ((url (cdr (assq :href cont)))
 	shr-start)
     (shr-generic cont)
@@ -129,7 +141,10 @@ fit these criteria."
 (defun shr-browse-url (widget &rest stuff)
   (browse-url (widget-get widget :url)))
 
-(defun shr-img (cont)
+(defun shr-tag-img (cont)
+  (when (and (> (current-column) 0)
+	     (not (eq shr-state 'image)))
+    (insert "\n"))
   (let ((start (point-marker)))
     (let ((alt (cdr (assq :alt cont)))
 	  (url (cdr (assq :src cont))))
@@ -166,15 +181,17 @@ fit these criteria."
 (defun shr-put-image (data point alt)
   (if (not (display-graphic-p))
       (insert alt)
-    (let ((image (shr-rescale-image data)))
-      (put-image image point alt))))
+    (let ((image (ignore-errors
+		   (shr-rescale-image data))))
+      (when image
+	(put-image image point alt)))))
 
 (defun shr-rescale-image (data)
   (if (or (not (fboundp 'imagemagick-types))
 	  (not (get-buffer-window (current-buffer))))
       (create-image data nil t)
     (let* ((image (create-image data nil t))
-	   (size (image-size image))
+	   (size (image-size image t))
 	   (width (car size))
 	   (height (cdr size))
 	   (edges (window-inside-pixel-edges
@@ -196,14 +213,16 @@ fit these criteria."
 		     image)))
       image)))
 
-(defun shr-pre (cont)
-  (let ((shr-folding-mode nil))
+(defun shr-tag-pre (cont)
+  (let ((shr-folding-mode 'none))
     (shr-ensure-newline)
     (shr-generic cont)
     (shr-ensure-newline)))
 
-(defun shr-blockquote (cont)
-  (shr-pre cont))
+(defun shr-tag-blockquote (cont)
+  (shr-ensure-paragraph)
+  (let ((shr-indentation (+ shr-indentation 4)))
+    (shr-generic cont)))
 
 (defun shr-ensure-newline ()
   (unless (zerop (current-column))
@@ -215,21 +234,41 @@ fit these criteria."
     (setq shr-state nil))
   (cond
    ((eq shr-folding-mode 'none)
-    (insert t))
+    (insert text))
    (t
-    (let (column)
+    (let ((first t)
+	  column)
+      (when (and (string-match "\\`[ \t\n]" text)
+		 (not (bolp)))
+	(insert " "))
       (dolist (elem (split-string text))
 	(setq column (current-column))
-	(when (plusp column)
-	  (if (> (+ column (length elem) 1) shr-width)
-	      (insert "\n")
-	    (insert " ")))
+	(when (> column 0)
+	  (cond
+	   ((and (or (not first)
+		     (eq shr-state 'space))
+		 (> (+ column (length elem) 1) shr-width))
+	    (insert "\n"))
+	   ((not first)
+	    (insert " "))))
+	(setq first nil)
+	(when (and (bolp)
+		   (> shr-indentation 0))
+	  (shr-indent))
 	;; The shr-start is a special variable that is used to pass
 	;; upwards the first point in the buffer where the text really
 	;; starts.
 	(unless shr-start
 	  (setq shr-start (point)))
-	(insert elem))))))
+	(insert elem))
+      (setq shr-state nil)
+      (when (and (string-match "[ \t\n]\\'" text)
+		 (not (bolp)))
+	(insert " ")
+	(setq shr-state 'space))))))
+
+(defun shr-indent ()
+  (insert (make-string shr-indentation ? )))
 
 (defun shr-get-image-data (url)
   "Get image data for URL.
@@ -241,6 +280,189 @@ Return a string with image data."
               (search-forward "\r\n\r\n" nil t))
       (buffer-substring (point) (point-max)))))
 
+(defvar shr-list-mode nil)
+
+(defun shr-tag-ul (cont)
+  (shr-ensure-paragraph)
+  (let ((shr-list-mode 'ul))
+    (shr-generic cont)))
+
+(defun shr-tag-ol (cont)
+  (let ((shr-list-mode 1))
+    (shr-generic cont)))
+
+(defun shr-tag-li (cont)
+  (shr-ensure-newline)
+  (let* ((bullet
+	  (if (numberp shr-list-mode)
+	      (prog1
+		  (format "%d " shr-list-mode)
+		(setq shr-list-mode (1+ shr-list-mode)))
+	    "* "))
+	 (shr-indentation (+ shr-indentation (length bullet))))
+    (insert bullet)
+    (shr-generic cont)))
+
+(defun shr-tag-br (cont)
+  (unless (bobp)
+    (insert "\n"))
+  (shr-generic cont))
+
+(defun shr-tag-h1 (cont)
+  (shr-heading cont 'bold 'underline))
+
+(defun shr-tag-h2 (cont)
+  (shr-heading cont 'bold))
+
+(defun shr-tag-h3 (cont)
+  (shr-heading cont 'italic))
+
+(defun shr-tag-h4 (cont)
+  (shr-heading cont))
+
+(defun shr-tag-h5 (cont)
+  (shr-heading cont))
+
+(defun shr-tag-h6 (cont)
+  (shr-heading cont))
+
+(defun shr-heading (cont &rest types)
+  (shr-ensure-paragraph)
+  (apply #'shr-fontize-cont cont types)
+  (shr-ensure-paragraph))
+
+(defun shr-tag-table (cont)
+  (shr-ensure-paragraph)
+  (setq cont (or (cdr (assq 'tbody cont))
+		 cont))
+  (let* ((columns (shr-column-specs cont))
+	 (suggested-widths (shr-pro-rate-columns columns))
+	 (sketch (shr-make-table cont suggested-widths))
+	 (sketch-widths (shr-table-widths sketch (length suggested-widths))))
+    (shr-insert-table (shr-make-table cont sketch-widths t) sketch-widths)))
+
+(defun shr-insert-table (table widths)
+  (shr-insert-table-ruler widths)
+  (dolist (row table)
+    (let ((start (point))
+	  (height (let ((max 0))
+		    (dolist (column row)
+		      (setq max (max max (cadr column))))
+		    max)))
+      (dotimes (i height)
+	(shr-indent)
+	(insert "|\n"))
+      (dolist (column row)
+	(goto-char start)
+	(let ((lines (split-string (nth 2 column) "\n")))
+	  (dolist (line lines)
+	    (when (> (length line) 0)
+	      (end-of-line)
+	      (insert line "|")
+	      (forward-line 1)))
+	  ;; Add blank lines at padding at the bottom of the TD,
+	  ;; possibly.
+	  (dotimes (i (- height (length lines)))
+	    (end-of-line)
+	    (insert (make-string (length (car lines)) ? ) "|")
+	    (forward-line 1)))))
+    (shr-insert-table-ruler widths)))
+
+(defun shr-insert-table-ruler (widths)
+  (shr-indent)
+  (insert "+")
+  (dotimes (i (length widths))
+    (insert (make-string (aref widths i) ?-) ?+))
+  (insert "\n"))
+
+(defun shr-table-widths (table length)
+  (let ((widths (make-vector length 0)))
+    (dolist (row table)
+      (let ((i 0))
+	(dolist (column row)
+	  (aset widths i (max (aref widths i)
+			      (car column)))
+	  (incf i))))
+    widths))
+
+(defun shr-make-table (cons widths &optional fill)
+  (let ((trs nil))
+    (dolist (row cont)
+      (when (eq (car row) 'tr)
+	(let ((i 0)
+	      (tds nil))
+	  (dolist (column (cdr row))
+	    (when (memq (car column) '(td th))
+	      (push (shr-render-td (cdr column) (aref widths i) fill)
+		    tds)
+	      (setq i (1+ i))))
+	  (push (nreverse tds) trs))))
+    (nreverse trs)))
+
+(defun shr-render-td (cont width fill)
+  (with-temp-buffer
+    (let ((shr-width width))
+      (shr-generic cont))
+    (while (re-search-backward "\n *$" nil t)
+      (delete-region (match-beginning 0) (match-end 0)))
+    (goto-char (point-min))
+    (let ((max 0))
+      (while (not (eobp))
+	(end-of-line)
+	(setq max (max max (current-column)))
+	(forward-line 1))
+      (when fill
+	(goto-char (point-min))
+	(while (not (eobp))
+	  (end-of-line)
+	  (insert (make-string (- width (current-column)) ? ))
+	  (forward-line 1)))
+      (list max (count-lines (point-min) (point-max)) (buffer-string)))))
+
+(defun shr-pro-rate-columns (columns)
+  (let ((total-percentage 0)
+	(widths (make-vector (length columns) 0)))
+    (dotimes (i (length columns))
+      (incf total-percentage (aref columns i)))
+    (setq total-percentage (/ 1.0 total-percentage))
+    (dotimes (i (length columns))
+      (aset widths i (max (truncate (* (aref columns i)
+				       total-percentage
+				       shr-width))
+			  10)))
+    widths))
+
+;; Return a summary of the number and shape of the TDs in the table.
+(defun shr-column-specs (cont)
+  (let ((columns (make-vector (shr-max-columns cont) 1)))
+    (dolist (row cont)
+      (when (eq (car row) 'tr)
+	(let ((i 0))
+	  (dolist (column (cdr row))
+	    (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)))))
+	    (setq i (1+ i))))))
+    columns))
+
+(defun shr-count (cont elem)
+  (let ((i 0))
+    (dolist (sub cont)
+      (when (eq (car sub) elem)
+	(setq i (1+ i))))
+    i))
+
+(defun shr-max-columns (cont)
+  (let ((max 0))
+    (dolist (row cont)
+      (when (eq (car row) 'tr)
+	(setq max (max max (shr-count (cdr row) 'td)))))
+    max))
+
 (provide 'shr)
 
 ;;; shr.el ends here