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367f7f81 LMI |
1 | ;;; shr.el --- Simple HTML Renderer |
2 | ||
3 | ;; Copyright (C) 2010 Free Software Foundation, Inc. | |
4 | ||
5 | ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org> | |
6 | ;; Keywords: html | |
7 | ||
8 | ;; This file is part of GNU Emacs. | |
9 | ||
10 | ;; GNU Emacs is free software: you can redistribute it and/or modify | |
11 | ;; it under the terms of the GNU General Public License as published by | |
12 | ;; the Free Software Foundation, either version 3 of the License, or | |
13 | ;; (at your option) any later version. | |
14 | ||
15 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;; GNU General Public License for more details. | |
19 | ||
20 | ;; You should have received a copy of the GNU General Public License | |
21 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. | |
22 | ||
23 | ;;; Commentary: | |
24 | ||
25 | ;; This package takes a HTML parse tree (as provided by | |
26 | ;; libxml-parse-html-region) and renders it in the current buffer. It | |
27 | ;; does not do CSS, JavaScript or anything advanced: It's geared | |
28 | ;; towards rendering typical short snippets of HTML, like what you'd | |
29 | ;; find in HTML email and the like. | |
30 | ||
31 | ;;; Code: | |
32 | ||
71e691a5 G |
33 | (require 'browse-url) |
34 | ||
870409d4 G |
35 | (defgroup shr nil |
36 | "Simple HTML Renderer" | |
37 | :group 'mail) | |
38 | ||
39 | (defcustom shr-max-image-proportion 0.9 | |
40 | "How big pictures displayed are in relation to the window they're in. | |
41 | A value of 0.7 means that they are allowed to take up 70% of the | |
42 | width and height of the window. If they are larger than this, | |
43 | and Emacs supports it, then the images will be rescaled down to | |
44 | fit these criteria." | |
45 | :version "24.1" | |
46 | :group 'shr | |
47 | :type 'float) | |
48 | ||
49 | (defcustom shr-blocked-images nil | |
50 | "Images that have URLs matching this regexp will be blocked." | |
51 | :version "24.1" | |
52 | :group 'shr | |
53 | :type 'regexp) | |
54 | ||
130e977f LMI |
55 | (defvar shr-content-function nil |
56 | "If bound, this should be a function that will return the content. | |
57 | This is used for cid: URLs, and the function is called with the | |
58 | cid: URL as the argument.") | |
59 | ||
66627fa9 G |
60 | (defvar shr-width 70 |
61 | "Frame width to use for rendering.") | |
62 | ||
63 | ;;; Internal variables. | |
64 | ||
870409d4 G |
65 | (defvar shr-folding-mode nil) |
66 | (defvar shr-state nil) | |
67 | (defvar shr-start nil) | |
a41c2e6d | 68 | (defvar shr-indentation 0) |
130e977f | 69 | (defvar shr-inhibit-images nil) |
66627fa9 | 70 | (defvar shr-list-mode nil) |
870409d4 | 71 | |
71e691a5 G |
72 | (defvar shr-map |
73 | (let ((map (make-sparse-keymap))) | |
74 | (define-key map "a" 'shr-show-alt-text) | |
75 | (define-key map "i" 'shr-browse-image) | |
76 | (define-key map "I" 'shr-insert-image) | |
77 | (define-key map "u" 'shr-copy-url) | |
78 | (define-key map "v" 'shr-browse-url) | |
79 | (define-key map "\r" 'shr-browse-url) | |
80 | map)) | |
81 | ||
66627fa9 G |
82 | ;; Public functions and commands. |
83 | ||
84 | ;;;###autoload | |
85 | (defun shr-insert-document (dom) | |
86 | (let ((shr-state nil) | |
87 | (shr-start nil)) | |
88 | (shr-descend (shr-transform-dom dom)))) | |
89 | ||
90 | (defun shr-copy-url () | |
91 | "Copy the URL under point to the kill ring. | |
92 | If called twice, then try to fetch the URL and see whether it | |
93 | redirects somewhere else." | |
94 | (interactive) | |
95 | (let ((url (get-text-property (point) 'shr-url))) | |
96 | (cond | |
97 | ((not url) | |
98 | (message "No URL under point")) | |
99 | ;; Resolve redirected URLs. | |
100 | ((equal url (car kill-ring)) | |
101 | (url-retrieve | |
102 | url | |
103 | (lambda (a) | |
104 | (when (and (consp a) | |
105 | (eq (car a) :redirect)) | |
106 | (with-temp-buffer | |
107 | (insert (cadr a)) | |
108 | (goto-char (point-min)) | |
109 | ;; Remove common tracking junk from the URL. | |
110 | (when (re-search-forward ".utm_.*" nil t) | |
111 | (replace-match "" t t)) | |
112 | (message "Copied %s" (buffer-string)) | |
113 | (copy-region-as-kill (point-min) (point-max))))))) | |
114 | ;; Copy the URL to the kill ring. | |
115 | (t | |
116 | (with-temp-buffer | |
117 | (insert url) | |
118 | (copy-region-as-kill (point-min) (point-max)) | |
119 | (message "Copied %s" url)))))) | |
120 | ||
121 | (defun shr-show-alt-text () | |
122 | "Show the ALT text of the image under point." | |
123 | (interactive) | |
124 | (let ((text (get-text-property (point) 'shr-alt))) | |
125 | (if (not text) | |
126 | (message "No image under point") | |
127 | (message "%s" text)))) | |
128 | ||
129 | (defun shr-browse-image () | |
130 | "Browse the image under point." | |
131 | (interactive) | |
132 | (let ((url (get-text-property (point) 'shr-image))) | |
133 | (if (not url) | |
134 | (message "No image under point") | |
135 | (message "Browsing %s..." url) | |
136 | (browse-url url)))) | |
137 | ||
138 | ;;; Utility functions. | |
139 | ||
870409d4 G |
140 | (defun shr-transform-dom (dom) |
141 | (let ((result (list (pop dom)))) | |
142 | (dolist (arg (pop dom)) | |
143 | (push (cons (intern (concat ":" (symbol-name (car arg))) obarray) | |
144 | (cdr arg)) | |
145 | result)) | |
146 | (dolist (sub dom) | |
147 | (if (stringp sub) | |
148 | (push (cons :text sub) result) | |
149 | (push (shr-transform-dom sub) result))) | |
150 | (nreverse result))) | |
151 | ||
870409d4 | 152 | (defun shr-descend (dom) |
a41c2e6d | 153 | (let ((function (intern (concat "shr-tag-" (symbol-name (car dom))) obarray))) |
870409d4 G |
154 | (if (fboundp function) |
155 | (funcall function (cdr dom)) | |
156 | (shr-generic (cdr dom))))) | |
157 | ||
158 | (defun shr-generic (cont) | |
159 | (dolist (sub cont) | |
160 | (cond | |
161 | ((eq (car sub) :text) | |
162 | (shr-insert (cdr sub))) | |
a41c2e6d | 163 | ((listp (cdr sub)) |
870409d4 G |
164 | (shr-descend sub))))) |
165 | ||
66627fa9 G |
166 | (defun shr-insert (text) |
167 | (when (eq shr-state 'image) | |
168 | (insert "\n") | |
169 | (setq shr-state nil)) | |
170 | (cond | |
171 | ((eq shr-folding-mode 'none) | |
172 | (insert text)) | |
173 | (t | |
174 | (let ((first t) | |
175 | column) | |
176 | (when (and (string-match "\\`[ \t\n]" text) | |
177 | (not (bolp))) | |
178 | (insert " ") | |
179 | (setq shr-state 'space)) | |
180 | (dolist (elem (split-string text)) | |
181 | (setq column (current-column)) | |
182 | (when (> column 0) | |
183 | (cond | |
184 | ((and (or (not first) | |
185 | (eq shr-state 'space)) | |
186 | (> (+ column (length elem) 1) shr-width)) | |
187 | (insert "\n")) | |
188 | ((not first) | |
189 | (insert " ")))) | |
190 | (setq first nil) | |
191 | (when (and (bolp) | |
192 | (> shr-indentation 0)) | |
193 | (shr-indent)) | |
194 | ;; The shr-start is a special variable that is used to pass | |
195 | ;; upwards the first point in the buffer where the text really | |
196 | ;; starts. | |
197 | (unless shr-start | |
198 | (setq shr-start (point))) | |
199 | (insert elem)) | |
200 | (setq shr-state nil) | |
201 | (when (and (string-match "[ \t\n]\\'" text) | |
202 | (not (bolp))) | |
203 | (insert " ") | |
204 | (setq shr-state 'space)))))) | |
205 | ||
206 | (defun shr-ensure-newline () | |
207 | (unless (zerop (current-column)) | |
208 | (insert "\n"))) | |
a41c2e6d G |
209 | |
210 | (defun shr-ensure-paragraph () | |
211 | (unless (bobp) | |
212 | (if (bolp) | |
71e691a5 G |
213 | (unless (save-excursion |
214 | (forward-line -1) | |
215 | (looking-at " *$")) | |
a41c2e6d G |
216 | (insert "\n")) |
217 | (if (save-excursion | |
218 | (beginning-of-line) | |
5d2ef6db | 219 | (looking-at " *$")) |
a41c2e6d G |
220 | (insert "\n") |
221 | (insert "\n\n"))))) | |
222 | ||
66627fa9 G |
223 | (defun shr-indent () |
224 | (insert (make-string shr-indentation ? ))) | |
870409d4 | 225 | |
a41c2e6d | 226 | (defun shr-fontize-cont (cont &rest types) |
870409d4 G |
227 | (let (shr-start) |
228 | (shr-generic cont) | |
a41c2e6d G |
229 | (dolist (type types) |
230 | (shr-add-font (or shr-start (point)) (point) type)))) | |
870409d4 G |
231 | |
232 | (defun shr-add-font (start end type) | |
233 | (let ((overlay (make-overlay start end))) | |
234 | (overlay-put overlay 'face type))) | |
235 | ||
71e691a5 G |
236 | (defun shr-browse-url () |
237 | "Browse the URL under point." | |
238 | (interactive) | |
239 | (let ((url (get-text-property (point) 'shr-url))) | |
240 | (if (not url) | |
241 | (message "No link under point") | |
242 | (browse-url url)))) | |
243 | ||
870409d4 G |
244 | (defun shr-image-fetched (status buffer start end) |
245 | (when (and (buffer-name buffer) | |
246 | (not (plist-get status :error))) | |
247 | (url-store-in-cache (current-buffer)) | |
248 | (when (or (search-forward "\n\n" nil t) | |
249 | (search-forward "\r\n\r\n" nil t)) | |
250 | (let ((data (buffer-substring (point) (point-max)))) | |
251 | (with-current-buffer buffer | |
252 | (let ((alt (buffer-substring start end)) | |
253 | (inhibit-read-only t)) | |
254 | (delete-region start end) | |
255 | (shr-put-image data start alt)))))) | |
256 | (kill-buffer (current-buffer))) | |
257 | ||
258 | (defun shr-put-image (data point alt) | |
259 | (if (not (display-graphic-p)) | |
260 | (insert alt) | |
a41c2e6d G |
261 | (let ((image (ignore-errors |
262 | (shr-rescale-image data)))) | |
263 | (when image | |
264 | (put-image image point alt))))) | |
870409d4 G |
265 | |
266 | (defun shr-rescale-image (data) | |
267 | (if (or (not (fboundp 'imagemagick-types)) | |
268 | (not (get-buffer-window (current-buffer)))) | |
269 | (create-image data nil t) | |
270 | (let* ((image (create-image data nil t)) | |
a41c2e6d | 271 | (size (image-size image t)) |
870409d4 G |
272 | (width (car size)) |
273 | (height (cdr size)) | |
274 | (edges (window-inside-pixel-edges | |
275 | (get-buffer-window (current-buffer)))) | |
276 | (window-width (truncate (* shr-max-image-proportion | |
277 | (- (nth 2 edges) (nth 0 edges))))) | |
278 | (window-height (truncate (* shr-max-image-proportion | |
279 | (- (nth 3 edges) (nth 1 edges))))) | |
280 | scaled-image) | |
281 | (when (> height window-height) | |
282 | (setq image (or (create-image data 'imagemagick t | |
283 | :height window-height) | |
284 | image)) | |
285 | (setq size (image-size image t))) | |
286 | (when (> (car size) window-width) | |
287 | (setq image (or | |
288 | (create-image data 'imagemagick t | |
289 | :width window-width) | |
290 | image))) | |
291 | image))) | |
292 | ||
870409d4 G |
293 | (defun shr-get-image-data (url) |
294 | "Get image data for URL. | |
295 | Return a string with image data." | |
296 | (with-temp-buffer | |
297 | (mm-disable-multibyte) | |
71e691a5 G |
298 | (when (ignore-errors |
299 | (url-cache-extract (url-cache-create-filename url)) | |
300 | t) | |
301 | (when (or (search-forward "\n\n" nil t) | |
302 | (search-forward "\r\n\r\n" nil t)) | |
303 | (buffer-substring (point) (point-max)))))) | |
870409d4 | 304 | |
66627fa9 G |
305 | (defun shr-heading (cont &rest types) |
306 | (shr-ensure-paragraph) | |
307 | (apply #'shr-fontize-cont cont types) | |
308 | (shr-ensure-paragraph)) | |
309 | ||
310 | ;;; Tag-specific rendering rules. | |
311 | ||
312 | (defun shr-tag-p (cont) | |
313 | (shr-ensure-paragraph) | |
314 | (shr-generic cont) | |
315 | (shr-ensure-paragraph)) | |
316 | ||
317 | (defun shr-tag-b (cont) | |
318 | (shr-fontize-cont cont 'bold)) | |
319 | ||
320 | (defun shr-tag-i (cont) | |
321 | (shr-fontize-cont cont 'italic)) | |
322 | ||
323 | (defun shr-tag-em (cont) | |
324 | (shr-fontize-cont cont 'bold)) | |
325 | ||
326 | (defun shr-tag-u (cont) | |
327 | (shr-fontize-cont cont 'underline)) | |
328 | ||
329 | (defun shr-tag-s (cont) | |
330 | (shr-fontize-cont cont 'strike-through)) | |
331 | ||
332 | (defun shr-tag-a (cont) | |
333 | (let ((url (cdr (assq :href cont))) | |
334 | (start (point)) | |
335 | shr-start) | |
336 | (shr-generic cont) | |
337 | (widget-convert-button | |
338 | 'link (or shr-start start) (point) | |
339 | :help-echo url) | |
340 | (put-text-property (or shr-start start) (point) 'keymap shr-map) | |
341 | (put-text-property (or shr-start start) (point) 'shr-url url))) | |
342 | ||
343 | (defun shr-tag-img (cont) | |
344 | (when (and (> (current-column) 0) | |
345 | (not (eq shr-state 'image))) | |
346 | (insert "\n")) | |
347 | (let ((start (point-marker))) | |
348 | (let ((alt (cdr (assq :alt cont))) | |
349 | (url (cdr (assq :src cont)))) | |
350 | (when (zerop (length alt)) | |
351 | (setq alt "[img]")) | |
352 | (cond | |
353 | ((and (not shr-inhibit-images) | |
354 | (string-match "\\`cid:" url)) | |
355 | (let ((url (substring url (match-end 0))) | |
356 | image) | |
357 | (if (or (not shr-content-function) | |
358 | (not (setq image (funcall shr-content-function url)))) | |
359 | (insert alt) | |
360 | (shr-put-image image (point) alt)))) | |
361 | ((or shr-inhibit-images | |
362 | (and shr-blocked-images | |
363 | (string-match shr-blocked-images url))) | |
364 | (setq shr-start (point)) | |
365 | (let ((shr-state 'space)) | |
366 | (if (> (length alt) 8) | |
367 | (shr-insert (substring alt 0 8)) | |
368 | (shr-insert alt)))) | |
369 | ((url-is-cached (browse-url-url-encode-chars url "[&)$ ]")) | |
370 | (shr-put-image (shr-get-image-data url) (point) alt)) | |
371 | (t | |
372 | (insert alt) | |
373 | (ignore-errors | |
374 | (url-retrieve url 'shr-image-fetched | |
375 | (list (current-buffer) start (point-marker)) | |
376 | t)))) | |
377 | (insert " ") | |
378 | (put-text-property start (point) 'keymap shr-map) | |
379 | (put-text-property start (point) 'shr-alt alt) | |
380 | (put-text-property start (point) 'shr-image url) | |
381 | (setq shr-state 'image)))) | |
382 | ||
383 | (defun shr-tag-pre (cont) | |
384 | (let ((shr-folding-mode 'none)) | |
385 | (shr-ensure-newline) | |
386 | (shr-generic cont) | |
387 | (shr-ensure-newline))) | |
388 | ||
389 | (defun shr-tag-blockquote (cont) | |
390 | (shr-ensure-paragraph) | |
391 | (let ((shr-indentation (+ shr-indentation 4))) | |
392 | (shr-generic cont)) | |
393 | (shr-ensure-paragraph)) | |
a41c2e6d G |
394 | |
395 | (defun shr-tag-ul (cont) | |
396 | (shr-ensure-paragraph) | |
397 | (let ((shr-list-mode 'ul)) | |
398 | (shr-generic cont))) | |
399 | ||
400 | (defun shr-tag-ol (cont) | |
401 | (let ((shr-list-mode 1)) | |
402 | (shr-generic cont))) | |
403 | ||
404 | (defun shr-tag-li (cont) | |
405 | (shr-ensure-newline) | |
8028ed5c LMI |
406 | (let* ((bullet |
407 | (if (numberp shr-list-mode) | |
408 | (prog1 | |
409 | (format "%d " shr-list-mode) | |
410 | (setq shr-list-mode (1+ shr-list-mode))) | |
411 | "* ")) | |
412 | (shr-indentation (+ shr-indentation (length bullet)))) | |
413 | (insert bullet) | |
414 | (shr-generic cont))) | |
a41c2e6d G |
415 | |
416 | (defun shr-tag-br (cont) | |
1e463294 LMI |
417 | (unless (bobp) |
418 | (insert "\n")) | |
a41c2e6d G |
419 | (shr-generic cont)) |
420 | ||
421 | (defun shr-tag-h1 (cont) | |
422 | (shr-heading cont 'bold 'underline)) | |
423 | ||
424 | (defun shr-tag-h2 (cont) | |
425 | (shr-heading cont 'bold)) | |
426 | ||
427 | (defun shr-tag-h3 (cont) | |
428 | (shr-heading cont 'italic)) | |
429 | ||
430 | (defun shr-tag-h4 (cont) | |
431 | (shr-heading cont)) | |
432 | ||
433 | (defun shr-tag-h5 (cont) | |
434 | (shr-heading cont)) | |
435 | ||
436 | (defun shr-tag-h6 (cont) | |
437 | (shr-heading cont)) | |
438 | ||
66627fa9 | 439 | ;;; Table rendering algorithm. |
a41c2e6d | 440 | |
a0ec382a LMI |
441 | ;; Table rendering is the only complicated thing here. We do this by |
442 | ;; first counting how many TDs there are in each TR, and registering | |
443 | ;; how wide they think they should be ("width=45%", etc). Then we | |
444 | ;; render each TD separately (this is done in temporary buffers, so | |
445 | ;; that we can use all the rendering machinery as if we were in the | |
446 | ;; main buffer). Now we know how much space each TD really takes, so | |
447 | ;; we then render everything again with the new widths, and finally | |
448 | ;; insert all these boxes into the main buffer. | |
71e691a5 G |
449 | (defun shr-tag-table (cont) |
450 | (shr-ensure-paragraph) | |
451 | (setq cont (or (cdr (assq 'tbody cont)) | |
452 | cont)) | |
130e977f | 453 | (let* ((shr-inhibit-images t) |
a0ec382a | 454 | ;; Find all suggested widths. |
130e977f | 455 | (columns (shr-column-specs cont)) |
a0ec382a | 456 | ;; Compute how many characters wide each TD should be. |
71e691a5 | 457 | (suggested-widths (shr-pro-rate-columns columns)) |
a0ec382a LMI |
458 | ;; Do a "test rendering" to see how big each TD is (this can |
459 | ;; be smaller (if there's little text) or bigger (if there's | |
460 | ;; unbreakable text). | |
71e691a5 G |
461 | (sketch (shr-make-table cont suggested-widths)) |
462 | (sketch-widths (shr-table-widths sketch (length suggested-widths)))) | |
a0ec382a | 463 | ;; Then render the table again with these new "hard" widths. |
130e977f | 464 | (shr-insert-table (shr-make-table cont sketch-widths t) sketch-widths)) |
a0ec382a LMI |
465 | ;; Finally, insert all the images after the table. The Emacs buffer |
466 | ;; model isn't strong enough to allow us to put the images actually | |
467 | ;; into the tables. | |
130e977f LMI |
468 | (dolist (elem (shr-find-elements cont 'img)) |
469 | (shr-tag-img (cdr elem)))) | |
470 | ||
471 | (defun shr-find-elements (cont type) | |
472 | (let (result) | |
473 | (dolist (elem cont) | |
474 | (cond ((eq (car elem) type) | |
475 | (push elem result)) | |
476 | ((consp (cdr elem)) | |
477 | (setq result (nconc (shr-find-elements (cdr elem) type) result))))) | |
478 | (nreverse result))) | |
71e691a5 G |
479 | |
480 | (defun shr-insert-table (table widths) | |
481 | (shr-insert-table-ruler widths) | |
482 | (dolist (row table) | |
483 | (let ((start (point)) | |
484 | (height (let ((max 0)) | |
485 | (dolist (column row) | |
486 | (setq max (max max (cadr column)))) | |
487 | max))) | |
488 | (dotimes (i height) | |
489 | (shr-indent) | |
490 | (insert "|\n")) | |
491 | (dolist (column row) | |
492 | (goto-char start) | |
130e977f LMI |
493 | (let ((lines (split-string (nth 2 column) "\n")) |
494 | (overlay-lines (nth 3 column)) | |
495 | overlay overlay-line) | |
71e691a5 | 496 | (dolist (line lines) |
130e977f | 497 | (setq overlay-line (pop overlay-lines)) |
71e691a5 G |
498 | (when (> (length line) 0) |
499 | (end-of-line) | |
500 | (insert line "|") | |
130e977f LMI |
501 | (dolist (overlay overlay-line) |
502 | (let ((o (make-overlay (- (point) (nth 0 overlay) 1) | |
503 | (- (point) (nth 1 overlay) 1))) | |
504 | (properties (nth 2 overlay))) | |
505 | (while properties | |
506 | (overlay-put o (pop properties) (pop properties))))) | |
71e691a5 G |
507 | (forward-line 1))) |
508 | ;; Add blank lines at padding at the bottom of the TD, | |
509 | ;; possibly. | |
510 | (dotimes (i (- height (length lines))) | |
511 | (end-of-line) | |
512 | (insert (make-string (length (car lines)) ? ) "|") | |
513 | (forward-line 1))))) | |
514 | (shr-insert-table-ruler widths))) | |
515 | ||
516 | (defun shr-insert-table-ruler (widths) | |
517 | (shr-indent) | |
518 | (insert "+") | |
519 | (dotimes (i (length widths)) | |
520 | (insert (make-string (aref widths i) ?-) ?+)) | |
521 | (insert "\n")) | |
522 | ||
523 | (defun shr-table-widths (table length) | |
524 | (let ((widths (make-vector length 0))) | |
525 | (dolist (row table) | |
526 | (let ((i 0)) | |
527 | (dolist (column row) | |
528 | (aset widths i (max (aref widths i) | |
529 | (car column))) | |
530 | (incf i)))) | |
531 | widths)) | |
532 | ||
533 | (defun shr-make-table (cont widths &optional fill) | |
534 | (let ((trs nil)) | |
535 | (dolist (row cont) | |
536 | (when (eq (car row) 'tr) | |
a0ec382a LMI |
537 | (let ((tds nil) |
538 | (columns (cdr row)) | |
539 | (i 0) | |
540 | column) | |
541 | (while (< i (length widths)) | |
542 | (setq column (pop columns)) | |
543 | (when (or (memq (car column) '(td th)) | |
544 | (null column)) | |
71e691a5 G |
545 | (push (shr-render-td (cdr column) (aref widths i) fill) |
546 | tds) | |
547 | (setq i (1+ i)))) | |
548 | (push (nreverse tds) trs)))) | |
549 | (nreverse trs))) | |
550 | ||
551 | (defun shr-render-td (cont width fill) | |
552 | (with-temp-buffer | |
553 | (let ((shr-width width) | |
554 | (shr-indentation 0)) | |
555 | (shr-generic cont)) | |
35624242 LMI |
556 | (delete-region |
557 | (point) | |
558 | (+ (point) | |
559 | (skip-chars-backward " \t\n"))) | |
71e691a5 G |
560 | (goto-char (point-min)) |
561 | (let ((max 0)) | |
562 | (while (not (eobp)) | |
563 | (end-of-line) | |
564 | (setq max (max max (current-column))) | |
565 | (forward-line 1)) | |
566 | (when fill | |
567 | (goto-char (point-min)) | |
a0ec382a LMI |
568 | ;; If the buffer is totally empty, then put a single blank |
569 | ;; line here. | |
570 | (if (zerop (buffer-size)) | |
571 | (insert (make-string width ? )) | |
572 | ;; Otherwise, fill the buffer. | |
573 | (while (not (eobp)) | |
574 | (end-of-line) | |
575 | (when (> (- width (current-column)) 0) | |
576 | (insert (make-string (- width (current-column)) ? ))) | |
577 | (forward-line 1)))) | |
130e977f LMI |
578 | (list max |
579 | (count-lines (point-min) (point-max)) | |
580 | (buffer-string) | |
581 | (and fill | |
582 | (shr-collect-overlays)))))) | |
583 | ||
584 | (defun shr-collect-overlays () | |
585 | (save-excursion | |
586 | (goto-char (point-min)) | |
587 | (let ((overlays nil)) | |
588 | (while (not (eobp)) | |
589 | (push (shr-overlays-in-region (point) (line-end-position)) | |
590 | overlays) | |
591 | (forward-line 1)) | |
592 | (nreverse overlays)))) | |
593 | ||
594 | (defun shr-overlays-in-region (start end) | |
595 | (let (result) | |
596 | (dolist (overlay (overlays-in start end)) | |
597 | (push (list (if (> start (overlay-start overlay)) | |
598 | (- end start) | |
599 | (- end (overlay-start overlay))) | |
600 | (if (< end (overlay-end overlay)) | |
601 | 0 | |
602 | (- end (overlay-end overlay))) | |
603 | (overlay-properties overlay)) | |
604 | result)) | |
605 | (nreverse result))) | |
71e691a5 G |
606 | |
607 | (defun shr-pro-rate-columns (columns) | |
608 | (let ((total-percentage 0) | |
609 | (widths (make-vector (length columns) 0))) | |
610 | (dotimes (i (length columns)) | |
611 | (incf total-percentage (aref columns i))) | |
612 | (setq total-percentage (/ 1.0 total-percentage)) | |
613 | (dotimes (i (length columns)) | |
614 | (aset widths i (max (truncate (* (aref columns i) | |
615 | total-percentage | |
616 | shr-width)) | |
617 | 10))) | |
618 | widths)) | |
619 | ||
620 | ;; Return a summary of the number and shape of the TDs in the table. | |
621 | (defun shr-column-specs (cont) | |
622 | (let ((columns (make-vector (shr-max-columns cont) 1))) | |
623 | (dolist (row cont) | |
624 | (when (eq (car row) 'tr) | |
625 | (let ((i 0)) | |
626 | (dolist (column (cdr row)) | |
627 | (when (memq (car column) '(td th)) | |
628 | (let ((width (cdr (assq :width (cdr column))))) | |
629 | (when (and width | |
630 | (string-match "\\([0-9]+\\)%" width)) | |
631 | (aset columns i | |
632 | (/ (string-to-number (match-string 1 width)) | |
130e977f LMI |
633 | 100.0)))) |
634 | (setq i (1+ i))))))) | |
71e691a5 G |
635 | columns)) |
636 | ||
637 | (defun shr-count (cont elem) | |
638 | (let ((i 0)) | |
639 | (dolist (sub cont) | |
640 | (when (eq (car sub) elem) | |
641 | (setq i (1+ i)))) | |
642 | i)) | |
643 | ||
644 | (defun shr-max-columns (cont) | |
645 | (let ((max 0)) | |
646 | (dolist (row cont) | |
647 | (when (eq (car row) 'tr) | |
130e977f LMI |
648 | (setq max (max max (+ (shr-count (cdr row) 'td) |
649 | (shr-count (cdr row) 'th)))))) | |
71e691a5 G |
650 | max)) |
651 | ||
f3fd95db | 652 | (provide 'shr) |
367f7f81 LMI |
653 | |
654 | ;;; shr.el ends here |