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1 | ;;; doc-view.el --- View PDF/PostScript/DVI files in Emacs |
2 | ||
069b4ce3 | 3 | ;; Copyright (C) 2007, 2008 Free Software Foundation, Inc. |
94dbe99c TTN |
4 | ;; |
5 | ;; Author: Tassilo Horn <tassilo@member.fsf.org> | |
6 | ;; Maintainer: Tassilo Horn <tassilo@member.fsf.org> | |
7 | ;; Keywords: files, pdf, ps, dvi | |
94dbe99c TTN |
8 | |
9 | ;; This file is part of GNU Emacs. | |
10 | ||
eb3fa2cf | 11 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
94dbe99c | 12 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
13 | ;; the Free Software Foundation, either version 3 of the License, or |
14 | ;; (at your option) any later version. | |
94dbe99c TTN |
15 | |
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
eb3fa2cf | 22 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
94dbe99c TTN |
23 | |
24 | ;;; Requirements: | |
25 | ||
4b378e75 | 26 | ;; doc-view.el requires GNU Emacs 22.1 or newer. You also need Ghostscript, |
1ecc9da7 TH |
27 | ;; `dvipdf' (comes with Ghostscript) or `dvipdfm' (comes with teTeX or TeXLive) |
28 | ;; and `pdftotext', which comes with xpdf (http://www.foolabs.com/xpdf/) or | |
29 | ;; poppler (http://poppler.freedesktop.org/). | |
94dbe99c TTN |
30 | |
31 | ;;; Commentary: | |
32 | ||
33 | ;; DocView is a document viewer for Emacs. It converts PDF, PS and DVI files | |
34 | ;; to a set of PNG files, one PNG for each page, and displays the PNG images | |
35 | ;; inside an Emacs buffer. This buffer uses `doc-view-mode' which provides | |
36 | ;; convenient key bindings for browsing the document. | |
37 | ;; | |
640602f7 | 38 | ;; To use it simply open a document file with |
94dbe99c | 39 | ;; |
640602f7 | 40 | ;; C-x C-f ~/path/to/document RET |
94dbe99c | 41 | ;; |
640602f7 RS |
42 | ;; and the document will be converted and displayed, if your emacs supports png |
43 | ;; images. With `C-c C-c' you can toggle between the rendered images | |
1f75e53d | 44 | ;; representation and the source text representation of the document. |
94dbe99c TTN |
45 | ;; |
46 | ;; Since conversion may take some time all the PNG images are cached in a | |
47 | ;; subdirectory of `doc-view-cache-directory' and reused when you want to view | |
640602f7 RS |
48 | ;; that file again. To reconvert a document hit `g' (`doc-view-reconvert-doc') |
49 | ;; when displaying the document. To delete all cached files use | |
94dbe99c TTN |
50 | ;; `doc-view-clear-cache'. To open the cache with dired, so that you can tidy |
51 | ;; it out use `doc-view-dired-cache'. | |
52 | ;; | |
53 | ;; When conversion in underway the first page will be displayed as soon as it | |
54 | ;; is available and the available pages are refreshed every | |
55 | ;; `doc-view-conversion-refresh-interval' seconds. If that variable is nil the | |
56 | ;; pages won't be displayed before conversion of the document finished | |
57 | ;; completely. | |
58 | ;; | |
59 | ;; DocView lets you select a slice of the displayed pages. This slice will be | |
60 | ;; remembered and applied to all pages of the current document. This enables | |
61 | ;; you to cut away the margins of a document to save some space. To select a | |
62 | ;; slice you can use `doc-view-set-slice' (bound to `s s') which will query you | |
63 | ;; for the coordinates of the slice's top-left corner and its width and height. | |
64 | ;; A much more convenient way to do the same is offered by the command | |
65 | ;; `doc-view-set-slice-using-mouse' (bound to `s m'). After invokation you | |
66 | ;; only have to press mouse-1 at the top-left corner and drag it to the | |
67 | ;; bottom-right corner of the desired slice. To reset the slice use | |
68 | ;; `doc-view-reset-slice' (bound to `s r'). | |
69 | ;; | |
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70 | ;; You can also search within the document. The command `doc-view-search' |
71 | ;; (bound to `C-s') queries for a search regexp and initializes a list of all | |
72 | ;; matching pages and messages how many match-pages were found. After that you | |
7baca0fa JL |
73 | ;; can jump to the next page containing a match with an additional `C-s'. With |
74 | ;; `C-r' you can do the same, but backwards. To search for a new regexp give a | |
75 | ;; prefix arg to one of the search functions, e.g. by typing `C-u C-s'. The | |
76 | ;; searching works by using a plain text representation of the document. If | |
77 | ;; that doesn't already exist the first invokation of `doc-view-search' (or | |
78 | ;; `doc-view-search-backward') starts the conversion. When that finishes and | |
79 | ;; you're still viewing the document (i.e. you didn't switch to another buffer) | |
80 | ;; you're queried for the regexp then. | |
640602f7 RS |
81 | ;; |
82 | ;; Dired users can simply hit `v' on a document file. If it's a PS, PDF or DVI | |
83 | ;; it will be opened using `doc-view-mode'. | |
84 | ;; | |
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85 | |
86 | ;;; Configuration: | |
87 | ||
640602f7 RS |
88 | ;; If the images are too small or too big you should set the "-rXXX" option in |
89 | ;; `doc-view-ghostscript-options' to another value. (The bigger your screen, | |
90 | ;; the higher the value.) | |
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91 | ;; |
92 | ;; This and all other options can be set with the customization interface. | |
93 | ;; Simply do | |
94 | ;; | |
95 | ;; M-x customize-group RET doc-view RET | |
96 | ;; | |
97 | ;; and modify them to your needs. | |
98 | ||
34065e5e | 99 | ;;; Todo: |
94dbe99c | 100 | |
56741510 SM |
101 | ;; - add print command. |
102 | ;; - share more code with image-mode. | |
f4c75497 | 103 | ;; - better menu. |
f4c75497 | 104 | ;; - Bind slicing to a drag event. |
eb79098b | 105 | ;; - doc-view-fit-doc-to-window and doc-view-fit-window-to-doc? |
cec1df02 | 106 | ;; - zoom the region around the cursor (like xdvi). |
c17587fe SM |
107 | ;; - get rid of the silly arrow in the fringe. |
108 | ;; - improve anti-aliasing (pdf-utils gets it better). | |
f4c75497 | 109 | |
34065e5e JL |
110 | ;;;; About isearch support |
111 | ||
112 | ;; I tried implementing isearch by setting | |
113 | ;; `isearch-search-fun-function' buffer-locally, but that didn't | |
114 | ;; work too good. The function doing the real search was called | |
115 | ;; endlessly somehow. But even if we'd get that working no real | |
116 | ;; isearch feeling comes up due to the missing match highlighting. | |
117 | ;; Currently I display all lines containing a match in a tooltip and | |
118 | ;; each C-s or C-r jumps directly to the next/previous page with a | |
119 | ;; match. With isearch we could only display the current match. So | |
120 | ;; we had to decide if another C-s jumps to the next page with a | |
121 | ;; match (thus only the first match in a page will be displayed in a | |
122 | ;; tooltip) or to the next match, which would do nothing visible | |
123 | ;; (except the tooltip) if the next match is on the same page. | |
124 | ||
125 | ;; And it's much slower than the current search facility, because | |
126 | ;; isearch really searches for each step forward or backward wheras | |
127 | ;; the current approach searches once and then it knows to which | |
128 | ;; pages to jump. | |
129 | ||
130 | ;; Anyway, if someone with better isearch knowledge wants to give it a try, | |
131 | ;; feel free to do it. --Tassilo | |
132 | ||
133 | ;;; Code: | |
134 | ||
23cda572 | 135 | (eval-when-compile (require 'cl)) |
94dbe99c | 136 | (require 'dired) |
414dd971 | 137 | (require 'image-mode) |
7baca0fa | 138 | (require 'jka-compr) |
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139 | |
140 | ;;;; Customization Options | |
141 | ||
142 | (defgroup doc-view nil | |
143 | "In-buffer viewer for PDF, PostScript and DVI files." | |
144 | :link '(function-link doc-view) | |
145 | :version "22.2" | |
146 | :group 'applications | |
147 | :group 'multimedia | |
148 | :prefix "doc-view-") | |
149 | ||
c9a9a5e3 | 150 | (defcustom doc-view-ghostscript-program (executable-find "gs") |
94dbe99c | 151 | "Program to convert PS and PDF files to PNG." |
c9a9a5e3 | 152 | :type 'file |
94dbe99c TTN |
153 | :group 'doc-view) |
154 | ||
155 | (defcustom doc-view-ghostscript-options | |
6a658a30 RS |
156 | '("-dSAFER" ;; Avoid security problems when rendering files from untrusted |
157 | ;; sources. | |
158 | "-dNOPAUSE" "-sDEVICE=png16m" "-dTextAlphaBits=4" | |
05477667 | 159 | "-dBATCH" "-dGraphicsAlphaBits=4" "-dQUIET") |
4b378e75 | 160 | "A list of options to give to ghostscript." |
c9a9a5e3 | 161 | :type '(repeat string) |
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162 | :group 'doc-view) |
163 | ||
05477667 SM |
164 | (defcustom doc-view-resolution 100 |
165 | "Dots per inch resolution used to render the documents. | |
166 | Higher values result in larger images." | |
9efa445f DN |
167 | :type 'number |
168 | :group 'doc-view) | |
05477667 | 169 | |
c9a9a5e3 | 170 | (defcustom doc-view-dvipdfm-program (executable-find "dvipdfm") |
94dbe99c TTN |
171 | "Program to convert DVI files to PDF. |
172 | ||
173 | DVI file will be converted to PDF before the resulting PDF is | |
53d4c024 TH |
174 | converted to PNG. |
175 | ||
176 | If this and `doc-view-dvipdf-program' are set, | |
177 | `doc-view-dvipdf-program' will be preferred." | |
178 | :type 'file | |
179 | :group 'doc-view) | |
180 | ||
181 | (defcustom doc-view-dvipdf-program (executable-find "dvipdf") | |
182 | "Program to convert DVI files to PDF. | |
183 | ||
184 | DVI file will be converted to PDF before the resulting PDF is | |
185 | converted to PNG. | |
186 | ||
187 | If this and `doc-view-dvipdfm-program' are set, | |
188 | `doc-view-dvipdf-program' will be preferred." | |
c9a9a5e3 | 189 | :type 'file |
94dbe99c TTN |
190 | :group 'doc-view) |
191 | ||
c9a9a5e3 | 192 | (defcustom doc-view-ps2pdf-program (executable-find "ps2pdf") |
94dbe99c TTN |
193 | "Program to convert PS files to PDF. |
194 | ||
195 | PS files will be converted to PDF before searching is possible." | |
c9a9a5e3 | 196 | :type 'file |
94dbe99c TTN |
197 | :group 'doc-view) |
198 | ||
c9a9a5e3 | 199 | (defcustom doc-view-pdftotext-program (executable-find "pdftotext") |
94dbe99c TTN |
200 | "Program to convert PDF files to plain text. |
201 | ||
202 | Needed for searching." | |
c9a9a5e3 | 203 | :type 'file |
94dbe99c TTN |
204 | :group 'doc-view) |
205 | ||
c17587fe | 206 | (defcustom doc-view-cache-directory |
8aafd651 | 207 | (expand-file-name (format "docview%d" (user-uid)) |
bce6be12 | 208 | temporary-file-directory) |
94dbe99c | 209 | "The base directory, where the PNG images will be saved." |
c9a9a5e3 | 210 | :type 'directory |
94dbe99c TTN |
211 | :group 'doc-view) |
212 | ||
56741510 SM |
213 | (defvar doc-view-conversion-buffer " *doc-view conversion output*" |
214 | "The buffer where messages from the converter programs go to.") | |
94dbe99c | 215 | |
56741510 | 216 | (defcustom doc-view-conversion-refresh-interval 1 |
1f75e53d GM |
217 | "Interval in seconds between refreshes of the DocView buffer while converting. |
218 | After such a refresh newly converted pages will be available for | |
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219 | viewing. If set to nil there won't be any refreshes and the |
220 | pages won't be displayed before conversion of the whole document | |
221 | has finished." | |
c9a9a5e3 | 222 | :type 'integer |
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223 | :group 'doc-view) |
224 | ||
225 | ;;;; Internal Variables | |
226 | ||
de171465 SM |
227 | (defun doc-view-new-window-function (winprops) |
228 | (let ((ol (image-mode-window-get 'overlay winprops))) | |
229 | (if ol | |
230 | (setq ol (copy-overlay ol)) | |
10b6e7c1 | 231 | (assert (not (get-char-property (point-min) 'display))) |
de171465 SM |
232 | (setq ol (make-overlay (point-min) (point-max) nil t)) |
233 | (overlay-put ol 'doc-view t)) | |
234 | (overlay-put ol 'window (car winprops)) | |
235 | (image-mode-window-put 'overlay ol winprops))) | |
94dbe99c | 236 | |
de171465 | 237 | (defvar doc-view-current-files nil |
94dbe99c | 238 | "Only used internally.") |
ec4853ab | 239 | (make-variable-buffer-local 'doc-view-current-files) |
94dbe99c | 240 | |
ec4853ab | 241 | (defvar doc-view-current-converter-processes nil |
94dbe99c | 242 | "Only used internally.") |
ec4853ab | 243 | (make-variable-buffer-local 'doc-view-current-converter-processes) |
94dbe99c TTN |
244 | |
245 | (defvar doc-view-current-timer nil | |
246 | "Only used internally.") | |
ec4853ab | 247 | (make-variable-buffer-local 'doc-view-current-timer) |
94dbe99c | 248 | |
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249 | (defvar doc-view-current-cache-dir nil |
250 | "Only used internally.") | |
ec4853ab | 251 | (make-variable-buffer-local 'doc-view-current-cache-dir) |
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252 | |
253 | (defvar doc-view-current-search-matches nil | |
254 | "Only used internally.") | |
ec4853ab | 255 | (make-variable-buffer-local 'doc-view-current-search-matches) |
94dbe99c | 256 | |
d99abf1b RS |
257 | (defvar doc-view-pending-cache-flush nil |
258 | "Only used internally.") | |
94dbe99c | 259 | |
937cb3fb | 260 | (defvar doc-view-previous-major-mode nil |
640602f7 RS |
261 | "Only used internally.") |
262 | ||
39a402e3 TH |
263 | (defvar doc-view-buffer-file-name nil |
264 | "Only used internally. | |
265 | The file name used for conversion. Normally it's the same as | |
266 | `buffer-file-name', but for remote files, compressed files and | |
267 | files inside an archive it is a temporary copy of | |
268 | the (uncompressed, extracted) file residing in | |
269 | `doc-view-cache-directory'.") | |
270 | ||
eb79098b SM |
271 | (defvar doc-view-doc-type nil |
272 | "The type of document in the current buffer. | |
273 | Can be `dvi', `pdf', or `ps'.") | |
274 | ||
640602f7 | 275 | ;;;; DocView Keymaps |
94dbe99c TTN |
276 | |
277 | (defvar doc-view-mode-map | |
278 | (let ((map (make-sparse-keymap))) | |
d2d7e96c | 279 | (set-keymap-parent map image-mode-map) |
94dbe99c TTN |
280 | ;; Navigation in the document |
281 | (define-key map (kbd "n") 'doc-view-next-page) | |
282 | (define-key map (kbd "p") 'doc-view-previous-page) | |
eb8d0216 SM |
283 | (define-key map (kbd "<next>") 'forward-page) |
284 | (define-key map (kbd "<prior>") 'backward-page) | |
285 | (define-key map [remap forward-page] 'doc-view-next-page) | |
286 | (define-key map [remap backward-page] 'doc-view-previous-page) | |
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287 | (define-key map (kbd "SPC") 'doc-view-scroll-up-or-next-page) |
288 | (define-key map (kbd "DEL") 'doc-view-scroll-down-or-previous-page) | |
289 | (define-key map (kbd "M-<") 'doc-view-first-page) | |
290 | (define-key map (kbd "M->") 'doc-view-last-page) | |
7656fe61 | 291 | (define-key map [remap goto-line] 'doc-view-goto-page) |
05477667 SM |
292 | ;; Zoom in/out. |
293 | (define-key map "+" 'doc-view-enlarge) | |
294 | (define-key map "-" 'doc-view-shrink) | |
d2d7e96c | 295 | ;; Killing the buffer (and the process) |
94dbe99c | 296 | (define-key map (kbd "k") 'doc-view-kill-proc-and-buffer) |
937cb3fb | 297 | (define-key map (kbd "K") 'doc-view-kill-proc) |
94dbe99c TTN |
298 | ;; Slicing the image |
299 | (define-key map (kbd "s s") 'doc-view-set-slice) | |
300 | (define-key map (kbd "s m") 'doc-view-set-slice-using-mouse) | |
301 | (define-key map (kbd "s r") 'doc-view-reset-slice) | |
302 | ;; Searching | |
303 | (define-key map (kbd "C-s") 'doc-view-search) | |
304 | (define-key map (kbd "<find>") 'doc-view-search) | |
7baca0fa | 305 | (define-key map (kbd "C-r") 'doc-view-search-backward) |
94dbe99c TTN |
306 | ;; Show the tooltip |
307 | (define-key map (kbd "C-t") 'doc-view-show-tooltip) | |
640602f7 RS |
308 | ;; Toggle between text and image display or editing |
309 | (define-key map (kbd "C-c C-c") 'doc-view-toggle-display) | |
515357c2 TH |
310 | ;; Open a new buffer with doc's text contents |
311 | (define-key map (kbd "C-c C-t") 'doc-view-open-text) | |
640602f7 | 312 | ;; Reconvert the current document |
7656fe61 SM |
313 | (define-key map (kbd "g") 'revert-buffer) |
314 | (define-key map (kbd "r") 'revert-buffer) | |
94dbe99c | 315 | map) |
640602f7 RS |
316 | "Keymap used by `doc-view-mode' when displaying a doc as a set of images.") |
317 | ||
f4c75497 SM |
318 | (easy-menu-define doc-view-menu doc-view-mode-map |
319 | "Menu for Doc View mode." | |
320 | '("DocView" | |
321 | ["Set Slice" doc-view-set-slice-using-mouse] | |
322 | ["Set Slice (manual)" doc-view-set-slice] | |
323 | ["Reset Slice" doc-view-reset-slice] | |
324 | "---" | |
325 | ["Search" doc-view-search] | |
7baca0fa | 326 | ["Search Backwards" doc-view-search-backward] |
f4c75497 | 327 | ["Toggle display" doc-view-toggle-display] |
f4c75497 SM |
328 | )) |
329 | ||
937cb3fb | 330 | (defvar doc-view-minor-mode-map |
640602f7 RS |
331 | (let ((map (make-sparse-keymap))) |
332 | ;; Toggle between text and image display or editing | |
333 | (define-key map (kbd "C-c C-c") 'doc-view-toggle-display) | |
640602f7 | 334 | map) |
937cb3fb | 335 | "Keymap used by `doc-minor-view-mode'.") |
94dbe99c TTN |
336 | |
337 | ;;;; Navigation Commands | |
338 | ||
160dfe43 SM |
339 | (defmacro doc-view-current-page (&optional win) |
340 | `(image-mode-window-get 'page ,win)) | |
de171465 SM |
341 | (defmacro doc-view-current-info () `(image-mode-window-get 'info)) |
342 | (defmacro doc-view-current-overlay () `(image-mode-window-get 'overlay)) | |
343 | (defmacro doc-view-current-image () `(image-mode-window-get 'image)) | |
344 | (defmacro doc-view-current-slice () `(image-mode-window-get 'slice)) | |
345 | ||
94dbe99c TTN |
346 | (defun doc-view-goto-page (page) |
347 | "View the page given by PAGE." | |
348 | (interactive "nPage: ") | |
349 | (let ((len (length doc-view-current-files))) | |
350 | (if (< page 1) | |
1ca678aa | 351 | (setq page 1) |
56741510 SM |
352 | (when (and (> page len) |
353 | ;; As long as the converter is running, we don't know | |
354 | ;; how many pages will be available. | |
ec4853ab | 355 | (null doc-view-current-converter-processes)) |
1ca678aa | 356 | (setq page len))) |
de171465 SM |
357 | (setf (doc-view-current-page) page |
358 | (doc-view-current-info) | |
1ca678aa MC |
359 | (concat |
360 | (propertize | |
de171465 | 361 | (format "Page %d of %d." page len) 'face 'bold) |
1ca678aa | 362 | ;; Tell user if converting isn't finished yet |
ec4853ab | 363 | (if doc-view-current-converter-processes |
1ca678aa MC |
364 | " (still converting...)\n" |
365 | "\n") | |
366 | ;; Display context infos if this page matches the last search | |
367 | (when (and doc-view-current-search-matches | |
de171465 | 368 | (assq page doc-view-current-search-matches)) |
1ca678aa MC |
369 | (concat (propertize "Search matches:\n" 'face 'bold) |
370 | (let ((contexts "")) | |
de171465 | 371 | (dolist (m (cdr (assq page |
1ca678aa MC |
372 | doc-view-current-search-matches))) |
373 | (setq contexts (concat contexts " - \"" m "\"\n"))) | |
374 | contexts))))) | |
94dbe99c | 375 | ;; Update the buffer |
56741510 SM |
376 | ;; We used to find the file name from doc-view-current-files but |
377 | ;; that's not right if the pages are not generated sequentially | |
378 | ;; or if the page isn't in doc-view-current-files yet. | |
ec4853ab SM |
379 | (let ((file (expand-file-name (format "page-%d.png" page) |
380 | (doc-view-current-cache-dir)))) | |
381 | (doc-view-insert-image file :pointer 'arrow) | |
382 | (when (and (not (file-exists-p file)) | |
383 | doc-view-current-converter-processes) | |
384 | ;; The PNG file hasn't been generated yet. | |
385 | (doc-view-pdf->png-1 doc-view-buffer-file-name file page | |
386 | (lexical-let ((page page) | |
387 | (win (selected-window))) | |
388 | (lambda () | |
389 | (and (eq (current-buffer) (window-buffer win)) | |
390 | ;; If we changed page in the mean | |
391 | ;; time, don't mess things up. | |
392 | (eq (doc-view-current-page win) page) | |
393 | (with-selected-window win | |
394 | (doc-view-goto-page page)))))))) | |
de171465 SM |
395 | (overlay-put (doc-view-current-overlay) |
396 | 'help-echo (doc-view-current-info)))) | |
94dbe99c TTN |
397 | |
398 | (defun doc-view-next-page (&optional arg) | |
399 | "Browse ARG pages forward." | |
400 | (interactive "p") | |
de171465 | 401 | (doc-view-goto-page (+ (doc-view-current-page) (or arg 1)))) |
94dbe99c TTN |
402 | |
403 | (defun doc-view-previous-page (&optional arg) | |
404 | "Browse ARG pages backward." | |
405 | (interactive "p") | |
de171465 | 406 | (doc-view-goto-page (- (doc-view-current-page) (or arg 1)))) |
94dbe99c TTN |
407 | |
408 | (defun doc-view-first-page () | |
409 | "View the first page." | |
410 | (interactive) | |
411 | (doc-view-goto-page 1)) | |
412 | ||
413 | (defun doc-view-last-page () | |
414 | "View the last page." | |
415 | (interactive) | |
416 | (doc-view-goto-page (length doc-view-current-files))) | |
417 | ||
418 | (defun doc-view-scroll-up-or-next-page () | |
419 | "Scroll page up if possible, else goto next page." | |
420 | (interactive) | |
89663176 | 421 | (when (= (window-vscroll) (image-scroll-up nil)) |
de171465 | 422 | (let ((cur-page (doc-view-current-page))) |
bcc758ec | 423 | (doc-view-next-page) |
de171465 | 424 | (when (/= cur-page (doc-view-current-page)) |
d5793be3 | 425 | (image-scroll-down nil))))) |
94dbe99c TTN |
426 | |
427 | (defun doc-view-scroll-down-or-previous-page () | |
428 | "Scroll page down if possible, else goto previous page." | |
429 | (interactive) | |
89663176 | 430 | (when (= (window-vscroll) (image-scroll-down nil)) |
de171465 | 431 | (let ((cur-page (doc-view-current-page))) |
bcc758ec | 432 | (doc-view-previous-page) |
de171465 | 433 | (when (/= cur-page (doc-view-current-page)) |
bcc758ec | 434 | (image-scroll-up nil))))) |
94dbe99c | 435 | |
937cb3fb GM |
436 | ;;;; Utility Functions |
437 | ||
640602f7 | 438 | (defun doc-view-kill-proc () |
ec4853ab | 439 | "Kill the current converter process(es)." |
640602f7 | 440 | (interactive) |
ec4853ab | 441 | (while doc-view-current-converter-processes |
56741510 | 442 | (ignore-errors ;; Maybe it's dead already? |
ec4853ab | 443 | (kill-process (pop doc-view-current-converter-processes)))) |
640602f7 RS |
444 | (when doc-view-current-timer |
445 | (cancel-timer doc-view-current-timer) | |
446 | (setq doc-view-current-timer nil)) | |
447 | (setq mode-line-process nil)) | |
448 | ||
94dbe99c TTN |
449 | (defun doc-view-kill-proc-and-buffer () |
450 | "Kill the current converter process and buffer." | |
451 | (interactive) | |
640602f7 | 452 | (doc-view-kill-proc) |
94dbe99c | 453 | (when (eq major-mode 'doc-view-mode) |
94dbe99c TTN |
454 | (kill-buffer (current-buffer)))) |
455 | ||
c17587fe SM |
456 | (defun doc-view-make-safe-dir (dir) |
457 | (condition-case nil | |
458 | (let ((umask (default-file-modes))) | |
459 | (unwind-protect | |
460 | (progn | |
461 | ;; Create temp files with strict access rights. It's easy to | |
462 | ;; loosen them later, whereas it's impossible to close the | |
463 | ;; time-window of loose permissions otherwise. | |
464 | (set-default-file-modes #o0700) | |
465 | (make-directory dir)) | |
466 | ;; Reset the umask. | |
467 | (set-default-file-modes umask))) | |
468 | (file-already-exists | |
469 | (if (file-symlink-p dir) | |
470 | (error "Danger: %s points to a symbolic link" dir)) | |
471 | ;; In case it was created earlier with looser rights. | |
472 | ;; We could check the mode info returned by file-attributes, but it's | |
473 | ;; a pain to parse and it may not tell you what we want under | |
474 | ;; non-standard file-systems. So let's just say what we want and let | |
475 | ;; the underlying C code and file-system figure it out. | |
476 | ;; This also ends up checking a bunch of useful conditions: it makes | |
477 | ;; sure we have write-access to the directory and that we own it, thus | |
478 | ;; closing a bunch of security holes. | |
479 | (set-file-modes dir #o0700)))) | |
480 | ||
937cb3fb GM |
481 | (defun doc-view-current-cache-dir () |
482 | "Return the directory where the png files of the current doc should be saved. | |
483 | It's a subdirectory of `doc-view-cache-directory'." | |
484 | (if doc-view-current-cache-dir | |
485 | doc-view-current-cache-dir | |
c17587fe SM |
486 | ;; Try and make sure doc-view-cache-directory exists and is safe. |
487 | (doc-view-make-safe-dir doc-view-cache-directory) | |
488 | ;; Now compute the subdirectory to use. | |
937cb3fb GM |
489 | (setq doc-view-current-cache-dir |
490 | (file-name-as-directory | |
c17587fe | 491 | (expand-file-name |
39a402e3 TH |
492 | (concat (file-name-nondirectory buffer-file-name) |
493 | "-" | |
494 | (let ((file doc-view-buffer-file-name)) | |
495 | (with-temp-buffer | |
86903c81 | 496 | (set-buffer-multibyte nil) |
39a402e3 TH |
497 | (insert-file-contents-literally file) |
498 | (md5 (current-buffer))))) | |
c17587fe | 499 | doc-view-cache-directory))))) |
937cb3fb GM |
500 | |
501 | (defun doc-view-remove-if (predicate list) | |
502 | "Return LIST with all items removed that satisfy PREDICATE." | |
503 | (let (new-list) | |
504 | (dolist (item list (nreverse new-list)) | |
505 | (when (not (funcall predicate item)) | |
506 | (setq new-list (cons item new-list)))))) | |
507 | ||
789ab9d4 RS |
508 | ;;;###autoload |
509 | (defun doc-view-mode-p (type) | |
510 | "Return non-nil if image type TYPE is available for `doc-view'. | |
511 | Image types are symbols like `dvi', `postscript' or `pdf'." | |
512 | (and (display-graphic-p) | |
513 | (image-type-available-p 'png) | |
514 | (cond | |
515 | ((eq type 'dvi) | |
516 | (and (doc-view-mode-p 'pdf) | |
53d4c024 TH |
517 | (or (and doc-view-dvipdf-program |
518 | (executable-find doc-view-dvipdf-program)) | |
519 | (and doc-view-dvipdfm-program | |
520 | (executable-find doc-view-dvipdfm-program))))) | |
622face2 | 521 | ((or (eq type 'postscript) (eq type 'ps) (eq type 'eps) |
789ab9d4 RS |
522 | (eq type 'pdf)) |
523 | (and doc-view-ghostscript-program | |
524 | (executable-find doc-view-ghostscript-program))) | |
525 | (t ;; unknown image type | |
526 | nil)))) | |
527 | ||
94dbe99c TTN |
528 | ;;;; Conversion Functions |
529 | ||
05477667 SM |
530 | (defvar doc-view-shrink-factor 1.125) |
531 | ||
532 | (defun doc-view-enlarge (factor) | |
533 | "Enlarge the document." | |
534 | (interactive (list doc-view-shrink-factor)) | |
535 | (set (make-local-variable 'doc-view-resolution) | |
536 | (* factor doc-view-resolution)) | |
537 | (doc-view-reconvert-doc)) | |
538 | ||
539 | (defun doc-view-shrink (factor) | |
540 | "Shrink the document." | |
541 | (interactive (list doc-view-shrink-factor)) | |
542 | (doc-view-enlarge (/ 1.0 factor))) | |
543 | ||
c17587fe | 544 | (defun doc-view-reconvert-doc () |
640602f7 RS |
545 | "Reconvert the current document. |
546 | Should be invoked when the cached images aren't up-to-date." | |
547 | (interactive) | |
f4c75497 SM |
548 | (doc-view-kill-proc) |
549 | ;; Clear the old cached files | |
550 | (when (file-exists-p (doc-view-current-cache-dir)) | |
551 | (dired-delete-file (doc-view-current-cache-dir) 'always)) | |
c17587fe | 552 | (doc-view-initiate-display)) |
94dbe99c | 553 | |
b4cb319f SM |
554 | (defun doc-view-sentinel (proc event) |
555 | "Generic sentinel for doc-view conversion processes." | |
94dbe99c | 556 | (if (not (string-match "finished" event)) |
b4cb319f SM |
557 | (message "DocView: process %s changed status to %s." |
558 | (process-name proc) event) | |
ec4853ab SM |
559 | (when (buffer-live-p (process-get proc 'buffer)) |
560 | (with-current-buffer (process-get proc 'buffer) | |
561 | (setq doc-view-current-converter-processes | |
562 | (delq proc doc-view-current-converter-processes)) | |
563 | (setq mode-line-process | |
564 | (if doc-view-current-converter-processes | |
565 | (format ":%s" (car doc-view-current-converter-processes)))) | |
566 | (funcall (process-get proc 'callback)))))) | |
567 | ||
568 | (defun doc-view-start-process (name program args callback) | |
3c03f2ce TH |
569 | ;; Make sure the process is started in an existing directory, (rather than |
570 | ;; some file-name-handler-managed dir, for example). | |
571 | (let* ((default-directory (if (file-readable-p default-directory) | |
572 | default-directory | |
573 | (expand-file-name "~/"))) | |
ec4853ab SM |
574 | (proc (apply 'start-process name doc-view-conversion-buffer |
575 | program args))) | |
576 | (push proc doc-view-current-converter-processes) | |
577 | (setq mode-line-process (list (format ":%s" proc))) | |
578 | (set-process-sentinel proc 'doc-view-sentinel) | |
579 | (process-put proc 'buffer (current-buffer)) | |
580 | (process-put proc 'callback callback))) | |
b4cb319f SM |
581 | |
582 | (defun doc-view-dvi->pdf (dvi pdf callback) | |
583 | "Convert DVI to PDF asynchronously and call CALLBACK when finished." | |
53d4c024 TH |
584 | ;; Prefer dvipdf over dvipdfm, because the latter has problems if the DVI |
585 | ;; references and includes other PS files. | |
586 | (if (and doc-view-dvipdf-program | |
587 | (executable-find doc-view-dvipdf-program)) | |
588 | (doc-view-start-process "dvi->pdf" doc-view-dvipdf-program | |
589 | (list dvi pdf) | |
590 | callback) | |
591 | (doc-view-start-process "dvi->pdf" doc-view-dvipdfm-program | |
592 | (list "-o" pdf dvi) | |
593 | callback))) | |
ec4853ab | 594 | |
94dbe99c TTN |
595 | |
596 | (defun doc-view-pdf/ps->png (pdf-ps png) | |
1f75e53d | 597 | "Convert PDF-PS to PNG asynchronously." |
ec4853ab SM |
598 | (doc-view-start-process |
599 | "pdf/ps->png" doc-view-ghostscript-program | |
600 | (append doc-view-ghostscript-options | |
601 | (list (format "-r%d" (round doc-view-resolution)) | |
602 | (concat "-sOutputFile=" png) | |
603 | pdf-ps)) | |
3c03f2ce | 604 | (lambda () |
ec4853ab SM |
605 | (when doc-view-current-timer |
606 | (cancel-timer doc-view-current-timer) | |
607 | (setq doc-view-current-timer nil)) | |
608 | (doc-view-display (current-buffer) 'force))) | |
609 | ;; Update the displayed pages as soon as they're done generating. | |
94dbe99c TTN |
610 | (when doc-view-conversion-refresh-interval |
611 | (setq doc-view-current-timer | |
ec4853ab SM |
612 | (run-at-time "1 secs" doc-view-conversion-refresh-interval |
613 | 'doc-view-display | |
614 | (current-buffer))))) | |
615 | ||
616 | (defun doc-view-pdf->png-1 (pdf png page callback) | |
617 | "Convert a PAGE of a PDF file to PNG asynchronously. | |
618 | Call CALLBACK with no arguments when done." | |
619 | (doc-view-start-process | |
620 | "pdf->png-1" doc-view-ghostscript-program | |
621 | (append doc-view-ghostscript-options | |
622 | (list (format "-r%d" (round doc-view-resolution)) | |
623 | ;; Sadly, `gs' only supports the page-range | |
624 | ;; for PDF files. | |
625 | (format "-dFirstPage=%d" page) | |
626 | (format "-dLastPage=%d" page) | |
627 | (concat "-sOutputFile=" png) | |
628 | pdf)) | |
629 | callback)) | |
630 | ||
aa360da1 GM |
631 | (declare-function clear-image-cache "image.c" (&optional filter)) |
632 | ||
ec4853ab SM |
633 | (defun doc-view-pdf->png (pdf png pages) |
634 | "Convert a PDF file to PNG asynchronously. | |
635 | Start by converting PAGES, and then the rest." | |
636 | (if (null pages) | |
637 | (doc-view-pdf/ps->png pdf png) | |
638 | ;; We could render several `pages' with a single process if they're | |
639 | ;; (almost) consecutive, but since in 99% of the cases, there'll be only | |
640 | ;; a single page anyway, and of the remaining 1%, few cases will have | |
641 | ;; consecutive pages, it's not worth the trouble. | |
642 | (lexical-let ((pdf pdf) (png png) (rest (cdr pages))) | |
643 | (doc-view-pdf->png-1 | |
644 | pdf (format png (car pages)) (car pages) | |
645 | (lambda () | |
646 | (if rest | |
647 | (doc-view-pdf->png pdf png rest) | |
648 | ;; Yippie, the important pages are done, update the display. | |
649 | (clear-image-cache) | |
650 | ;; Convert the rest of the pages. | |
651 | (doc-view-pdf/ps->png pdf png))))))) | |
94dbe99c | 652 | |
b4cb319f SM |
653 | (defun doc-view-pdf->txt (pdf txt callback) |
654 | "Convert PDF to TXT asynchronously and call CALLBACK when finished." | |
ec4853ab SM |
655 | (doc-view-start-process "pdf->txt" doc-view-pdftotext-program |
656 | (list "-raw" pdf txt) | |
657 | callback)) | |
515357c2 | 658 | |
b4cb319f SM |
659 | (defun doc-view-doc->txt (txt callback) |
660 | "Convert the current document to text and call CALLBACK when done." | |
7edd6b92 | 661 | (make-directory (doc-view-current-cache-dir) t) |
b4cb319f SM |
662 | (case doc-view-doc-type |
663 | ||
664 | ;; Doc is a PDF, so convert it to TXT | |
665 | (doc-view-pdf->txt doc-view-buffer-file-name txt callback)) | |
666 | (ps | |
667 | ;; Doc is a PS, so convert it to PDF (which will be converted to | |
668 | ;; TXT thereafter). | |
669 | (lexical-let ((pdf (expand-file-name "doc.pdf" | |
670 | (doc-view-current-cache-dir))) | |
671 | (txt txt) | |
672 | (callback callback)) | |
673 | (doc-view-ps->pdf doc-view-buffer-file-name pdf | |
674 | (lambda () (doc-view-pdf->txt pdf txt callback))))) | |
675 | (dvi | |
676 | ;; Doc is a DVI. This means that a doc.pdf already exists in its | |
677 | ;; cache subdirectory. | |
678 | (doc-view-pdf->txt (expand-file-name "doc.pdf" | |
679 | (doc-view-current-cache-dir)) | |
680 | txt callback)) | |
681 | (t (error "DocView doesn't know what to do")))) | |
682 | ||
683 | (defun doc-view-ps->pdf (ps pdf callback) | |
684 | "Convert PS to PDF asynchronously and call CALLBACK when finished." | |
ec4853ab SM |
685 | (doc-view-start-process "ps->pdf" doc-view-ps2pdf-program |
686 | (list | |
687 | ;; Avoid security problems when rendering files from | |
688 | ;; untrusted sources. | |
689 | "-dSAFER" | |
690 | ;; in-file and out-file | |
691 | ps pdf) | |
692 | callback)) | |
693 | ||
694 | (defun doc-view-active-pages () | |
695 | (let ((pages ())) | |
696 | (dolist (win (get-buffer-window-list (current-buffer) nil 'visible)) | |
697 | (let ((page (image-mode-window-get 'page win))) | |
698 | (unless (memq page pages) (push page pages)))) | |
699 | pages)) | |
94dbe99c | 700 | |
640602f7 | 701 | (defun doc-view-convert-current-doc () |
39a402e3 | 702 | "Convert `doc-view-buffer-file-name' to a set of png files, one file per page. |
640602f7 RS |
703 | Those files are saved in the directory given by the function |
704 | `doc-view-current-cache-dir'." | |
c17587fe SM |
705 | ;; Let stale files still display while we recompute the new ones, so only |
706 | ;; flush the cache when the conversion is over. One of the reasons why it | |
707 | ;; is important to keep displaying the stale page is so that revert-buffer | |
708 | ;; preserves the horizontal/vertical scroll settings (which are otherwise | |
709 | ;; resets during the redisplay). | |
710 | (setq doc-view-pending-cache-flush t) | |
711 | (let ((png-file (expand-file-name "page-%d.png" | |
712 | (doc-view-current-cache-dir)))) | |
7edd6b92 | 713 | (make-directory (doc-view-current-cache-dir) t) |
eb79098b SM |
714 | (case doc-view-doc-type |
715 | (dvi | |
716 | ;; DVI files have to be converted to PDF before Ghostscript can process | |
717 | ;; it. | |
b4cb319f SM |
718 | (lexical-let |
719 | ((pdf (expand-file-name "doc.pdf" doc-view-current-cache-dir)) | |
720 | (png-file png-file)) | |
721 | (doc-view-dvi->pdf doc-view-buffer-file-name pdf | |
722 | (lambda () (doc-view-pdf/ps->png pdf png-file))))) | |
ec4853ab SM |
723 | |
724 | (let ((pages (doc-view-active-pages))) | |
725 | ;; Convert PDF to PNG images starting with the active pages. | |
726 | (doc-view-pdf->png doc-view-buffer-file-name png-file pages))) | |
eb79098b SM |
727 | (t |
728 | ;; Convert to PNG images. | |
729 | (doc-view-pdf/ps->png doc-view-buffer-file-name png-file))))) | |
94dbe99c | 730 | |
94dbe99c TTN |
731 | ;;;; Slicing |
732 | ||
aa360da1 GM |
733 | (declare-function image-size "image.c" (spec &optional pixels frame)) |
734 | ||
94dbe99c TTN |
735 | (defun doc-view-set-slice (x y width height) |
736 | "Set the slice of the images that should be displayed. | |
737 | You can use this function to tell doc-view not to display the | |
738 | margins of the document. It prompts for the top-left corner (X | |
739 | and Y) of the slice to display and its WIDTH and HEIGHT. | |
740 | ||
741 | See `doc-view-set-slice-using-mouse' for a more convenient way to | |
742 | do that. To reset the slice use `doc-view-reset-slice'." | |
743 | (interactive | |
de171465 | 744 | (let* ((size (image-size (doc-view-current-image) t)) |
1ca678aa MC |
745 | (a (read-number (format "Top-left X (0..%d): " (car size)))) |
746 | (b (read-number (format "Top-left Y (0..%d): " (cdr size)))) | |
747 | (c (read-number (format "Width (0..%d): " (- (car size) a)))) | |
748 | (d (read-number (format "Height (0..%d): " (- (cdr size) b))))) | |
94dbe99c | 749 | (list a b c d))) |
de171465 | 750 | (setf (doc-view-current-slice) (list x y width height)) |
94dbe99c | 751 | ;; Redisplay |
de171465 | 752 | (doc-view-goto-page (doc-view-current-page))) |
94dbe99c TTN |
753 | |
754 | (defun doc-view-set-slice-using-mouse () | |
755 | "Set the slice of the images that should be displayed. | |
756 | You set the slice by pressing mouse-1 at its top-left corner and | |
757 | dragging it to its bottom-right corner. See also | |
758 | `doc-view-set-slice' and `doc-view-reset-slice'." | |
759 | (interactive) | |
760 | (let (x y w h done) | |
761 | (while (not done) | |
762 | (let ((e (read-event | |
1ca678aa MC |
763 | (concat "Press mouse-1 at the top-left corner and " |
764 | "drag it to the bottom-right corner!")))) | |
765 | (when (eq (car e) 'drag-mouse-1) | |
766 | (setq x (car (posn-object-x-y (event-start e)))) | |
767 | (setq y (cdr (posn-object-x-y (event-start e)))) | |
768 | (setq w (- (car (posn-object-x-y (event-end e))) x)) | |
769 | (setq h (- (cdr (posn-object-x-y (event-end e))) y)) | |
770 | (setq done t)))) | |
94dbe99c TTN |
771 | (doc-view-set-slice x y w h))) |
772 | ||
773 | (defun doc-view-reset-slice () | |
e48a5bf9 | 774 | "Reset the current slice. |
1f75e53d | 775 | After calling this function whole pages will be visible again." |
94dbe99c | 776 | (interactive) |
de171465 | 777 | (setf (doc-view-current-slice) nil) |
94dbe99c | 778 | ;; Redisplay |
de171465 | 779 | (doc-view-goto-page (doc-view-current-page))) |
94dbe99c TTN |
780 | |
781 | ;;;; Display | |
782 | ||
783 | (defun doc-view-insert-image (file &rest args) | |
784 | "Insert the given png FILE. | |
e48a5bf9 | 785 | ARGS is a list of image descriptors." |
c17587fe SM |
786 | (when doc-view-pending-cache-flush |
787 | (clear-image-cache) | |
788 | (setq doc-view-pending-cache-flush nil)) | |
de171465 | 789 | (let ((ol (doc-view-current-overlay)) |
56741510 SM |
790 | (image (if (and file (file-readable-p file)) |
791 | (apply 'create-image file 'png nil args))) | |
de171465 SM |
792 | (slice (doc-view-current-slice))) |
793 | (setf (doc-view-current-image) image) | |
56741510 | 794 | (move-overlay ol (point-min) (point-max)) |
de171465 | 795 | (overlay-put ol 'display |
56741510 SM |
796 | (cond |
797 | (image | |
de171465 SM |
798 | (if slice |
799 | (list (cons 'slice slice) image) | |
56741510 SM |
800 | image)) |
801 | ;; We're trying to display a page that doesn't exist. | |
ec4853ab | 802 | (doc-view-current-converter-processes |
56741510 SM |
803 | ;; Maybe the page doesn't exist *yet*. |
804 | "Cannot display this page (yet)!") | |
805 | (t | |
806 | ;; Typically happens if the conversion process somehow | |
807 | ;; failed. Better not signal an error here because it | |
808 | ;; could prevent a subsequent reconversion from fixing | |
809 | ;; the problem. | |
810 | (concat "Cannot display this page!\n" | |
811 | "Maybe because of a conversion failure!")))) | |
812 | (let ((win (overlay-get ol 'window))) | |
813 | (if (stringp (overlay-get ol 'display)) | |
814 | (progn ;Make sure the text is not scrolled out of view. | |
815 | (set-window-hscroll win 0) | |
816 | (set-window-vscroll win 0)) | |
817 | (let ((hscroll (image-mode-window-get 'hscroll win)) | |
818 | (vscroll (image-mode-window-get 'vscroll win))) | |
819 | ;; Reset scroll settings, in case they were changed. | |
820 | (if hscroll (set-window-hscroll win hscroll)) | |
821 | (if vscroll (set-window-vscroll win vscroll))))))) | |
94dbe99c TTN |
822 | |
823 | (defun doc-view-sort (a b) | |
824 | "Return non-nil if A should be sorted before B. | |
825 | Predicate for sorting `doc-view-current-files'." | |
f4c75497 SM |
826 | (or (< (length a) (length b)) |
827 | (and (= (length a) (length b)) | |
828 | (string< a b)))) | |
94dbe99c | 829 | |
65073003 SM |
830 | (defun doc-view-display (buffer &optional force) |
831 | "Start viewing the document in BUFFER. | |
214abdd4 SM |
832 | If FORCE is non-nil, start viewing even if the document does not |
833 | have the page we want to view." | |
65073003 | 834 | (with-current-buffer buffer |
56741510 SM |
835 | (let ((prev-pages doc-view-current-files)) |
836 | (setq doc-view-current-files | |
837 | (sort (directory-files (doc-view-current-cache-dir) t | |
838 | "page-[0-9]+\\.png" t) | |
839 | 'doc-view-sort)) | |
10b6e7c1 CY |
840 | (dolist (win (or (get-buffer-window-list buffer nil t) |
841 | (list (selected-window)))) | |
842 | (let* ((page (doc-view-current-page win)) | |
843 | (pagefile (expand-file-name (format "page-%d.png" page) | |
844 | (doc-view-current-cache-dir)))) | |
845 | (when (or force | |
846 | (and (not (member pagefile prev-pages)) | |
847 | (member pagefile doc-view-current-files))) | |
848 | (with-selected-window win | |
849 | (assert (eq (current-buffer) buffer)) | |
850 | (doc-view-goto-page page)))))))) | |
94dbe99c TTN |
851 | |
852 | (defun doc-view-buffer-message () | |
c17587fe SM |
853 | ;; Only show this message initially, not when refreshing the buffer (in which |
854 | ;; case it's better to keep displaying the "stale" page while computing | |
855 | ;; the fresh new ones). | |
de171465 SM |
856 | (unless (overlay-get (doc-view-current-overlay) 'display) |
857 | (overlay-put (doc-view-current-overlay) 'display | |
c17587fe SM |
858 | (concat (propertize "Welcome to DocView!" 'face 'bold) |
859 | "\n" | |
860 | " | |
1f75e53d | 861 | If you see this buffer it means that the document you want to view is being |
f4c75497 | 862 | converted to PNG and the conversion of the first page hasn't finished yet or |
94dbe99c TTN |
863 | `doc-view-conversion-refresh-interval' is set to nil. |
864 | ||
865 | For now these keys are useful: | |
866 | ||
1ca678aa | 867 | `q' : Bury this buffer. Conversion will go on in background. |
937cb3fb | 868 | `k' : Kill the conversion process and this buffer. |
c17587fe | 869 | `K' : Kill the conversion process.\n")))) |
94dbe99c | 870 | |
aa360da1 GM |
871 | (declare-function tooltip-show "tooltip" (text &optional use-echo-area)) |
872 | ||
94dbe99c TTN |
873 | (defun doc-view-show-tooltip () |
874 | (interactive) | |
de171465 | 875 | (tooltip-show (doc-view-current-info))) |
94dbe99c | 876 | |
515357c2 TH |
877 | (defun doc-view-open-text () |
878 | "Open a buffer with the current doc's contents as text." | |
879 | (interactive) | |
ec4853ab | 880 | (if doc-view-current-converter-processes |
515357c2 TH |
881 | (message "DocView: please wait till conversion finished.") |
882 | (let ((txt (expand-file-name "doc.txt" (doc-view-current-cache-dir)))) | |
883 | (if (file-readable-p txt) | |
884 | (find-file txt) | |
b4cb319f | 885 | (doc-view-doc->txt txt 'doc-view-open-text))))) |
515357c2 | 886 | |
937cb3fb | 887 | ;;;;; Toggle between editing and viewing |
640602f7 | 888 | |
515357c2 | 889 | |
640602f7 | 890 | (defun doc-view-toggle-display () |
937cb3fb | 891 | "Toggle between editing a document as text or viewing it." |
640602f7 | 892 | (interactive) |
937cb3fb GM |
893 | (if (eq major-mode 'doc-view-mode) |
894 | ;; Switch to editing mode | |
895 | (progn | |
896 | (doc-view-kill-proc) | |
897 | (setq buffer-read-only nil) | |
515357c2 TH |
898 | (remove-overlays (point-min) (point-max) 'doc-view t) |
899 | (set (make-local-variable 'image-mode-winprops-alist) t) | |
937cb3fb GM |
900 | ;; Switch to the previously used major mode or fall back to fundamental |
901 | ;; mode. | |
902 | (if doc-view-previous-major-mode | |
903 | (funcall doc-view-previous-major-mode) | |
904 | (fundamental-mode)) | |
c17587fe | 905 | (doc-view-minor-mode 1)) |
937cb3fb GM |
906 | ;; Switch to doc-view-mode |
907 | (when (and (buffer-modified-p) | |
908 | (y-or-n-p "The buffer has been modified. Save the changes? ")) | |
909 | (save-buffer)) | |
937cb3fb | 910 | (doc-view-mode))) |
640602f7 | 911 | |
94dbe99c TTN |
912 | ;;;; Searching |
913 | ||
515357c2 | 914 | |
94dbe99c TTN |
915 | (defun doc-view-search-internal (regexp file) |
916 | "Return a list of FILE's pages that contain text matching REGEXP. | |
1ca678aa MC |
917 | The value is an alist of the form (PAGE CONTEXTS) where PAGE is |
918 | the pagenumber and CONTEXTS are all lines of text containing a match." | |
94dbe99c TTN |
919 | (with-temp-buffer |
920 | (insert-file-contents file) | |
921 | (let ((page 1) | |
1ca678aa MC |
922 | (lastpage 1) |
923 | matches) | |
94dbe99c | 924 | (while (re-search-forward (concat "\\(?:\\([\f]\\)\\|\\(" |
1ca678aa | 925 | regexp "\\)\\)") nil t) |
069b4ce3 | 926 | (when (match-string 1) (setq page (1+ page))) |
1ca678aa MC |
927 | (when (match-string 2) |
928 | (if (/= page lastpage) | |
c17587fe | 929 | (push (cons page |
515357c2 TH |
930 | (list (buffer-substring |
931 | (line-beginning-position) | |
932 | (line-end-position)))) | |
933 | matches) | |
1ca678aa MC |
934 | (setq matches (cons |
935 | (append | |
936 | (or | |
937 | ;; This page already is a match. | |
938 | (car matches) | |
939 | ;; This is the first match on page. | |
940 | (list page)) | |
941 | (list (buffer-substring | |
942 | (line-beginning-position) | |
943 | (line-end-position)))) | |
944 | (cdr matches)))) | |
945 | (setq lastpage page))) | |
94dbe99c TTN |
946 | (nreverse matches)))) |
947 | ||
948 | (defun doc-view-search-no-of-matches (list) | |
949 | "Extract the number of matches from the search result LIST." | |
950 | (let ((no 0)) | |
951 | (dolist (p list) | |
952 | (setq no (+ no (1- (length p))))) | |
953 | no)) | |
954 | ||
7baca0fa JL |
955 | (defun doc-view-search-backward (new-query) |
956 | "Call `doc-view-search' for backward search. | |
957 | If prefix NEW-QUERY is given, ask for a new regexp." | |
958 | (interactive "P") | |
da99b369 | 959 | (doc-view-search new-query t)) |
7baca0fa JL |
960 | |
961 | (defun doc-view-search (new-query &optional backward) | |
962 | "Jump to the next match or initiate a new search if NEW-QUERY is given. | |
94dbe99c | 963 | If the current document hasn't been transformed to plain text |
7baca0fa JL |
964 | till now do that first. |
965 | If BACKWARD is non-nil, jump to the previous match." | |
966 | (interactive "P") | |
da99b369 | 967 | (if (and (not new-query) |
7baca0fa JL |
968 | doc-view-current-search-matches) |
969 | (if backward | |
970 | (doc-view-search-previous-match 1) | |
971 | (doc-view-search-next-match 1)) | |
972 | ;; New search, so forget the old results. | |
973 | (setq doc-view-current-search-matches nil) | |
974 | (let ((txt (expand-file-name "doc.txt" | |
975 | (doc-view-current-cache-dir)))) | |
976 | (if (file-readable-p txt) | |
977 | (progn | |
978 | (setq doc-view-current-search-matches | |
979 | (doc-view-search-internal | |
980 | (read-from-minibuffer "Regexp: ") | |
981 | txt)) | |
982 | (message "DocView: search yielded %d matches." | |
983 | (doc-view-search-no-of-matches | |
984 | doc-view-current-search-matches))) | |
985 | ;; We must convert to TXT first! | |
ec4853ab | 986 | (if doc-view-current-converter-processes |
7baca0fa | 987 | (message "DocView: please wait till conversion finished.") |
b4cb319f | 988 | (doc-view-doc->txt txt (lambda () (doc-view-search nil)))))))) |
94dbe99c TTN |
989 | |
990 | (defun doc-view-search-next-match (arg) | |
991 | "Go to the ARGth next matching page." | |
992 | (interactive "p") | |
937cb3fb | 993 | (let* ((next-pages (doc-view-remove-if |
de171465 | 994 | (lambda (i) (<= (car i) (doc-view-current-page))) |
937cb3fb | 995 | doc-view-current-search-matches)) |
1ca678aa | 996 | (page (car (nth (1- arg) next-pages)))) |
94dbe99c | 997 | (if page |
1ca678aa | 998 | (doc-view-goto-page page) |
94dbe99c | 999 | (when (and |
1ca678aa MC |
1000 | doc-view-current-search-matches |
1001 | (y-or-n-p "No more matches after current page. Wrap to first match? ")) | |
1002 | (doc-view-goto-page (caar doc-view-current-search-matches)))))) | |
94dbe99c TTN |
1003 | |
1004 | (defun doc-view-search-previous-match (arg) | |
1005 | "Go to the ARGth previous matching page." | |
1006 | (interactive "p") | |
937cb3fb | 1007 | (let* ((prev-pages (doc-view-remove-if |
de171465 | 1008 | (lambda (i) (>= (car i) (doc-view-current-page))) |
937cb3fb | 1009 | doc-view-current-search-matches)) |
1ca678aa | 1010 | (page (car (nth (1- arg) (nreverse prev-pages))))) |
94dbe99c | 1011 | (if page |
1ca678aa | 1012 | (doc-view-goto-page page) |
94dbe99c | 1013 | (when (and |
1ca678aa MC |
1014 | doc-view-current-search-matches |
1015 | (y-or-n-p "No more matches before current page. Wrap to last match? ")) | |
1016 | (doc-view-goto-page (caar (last doc-view-current-search-matches))))))) | |
94dbe99c | 1017 | |
640602f7 | 1018 | ;;;; User interface commands and the mode |
94dbe99c | 1019 | |
c17587fe SM |
1020 | ;; (put 'doc-view-mode 'mode-class 'special) |
1021 | ||
515357c2 TH |
1022 | (defun doc-view-already-converted-p () |
1023 | "Return non-nil if the current doc was already converted." | |
1024 | (and (file-exists-p (doc-view-current-cache-dir)) | |
1ecc9da7 | 1025 | (> (length (directory-files (doc-view-current-cache-dir) nil "\\.png$")) 0))) |
515357c2 | 1026 | |
c17587fe SM |
1027 | (defun doc-view-initiate-display () |
1028 | ;; Switch to image display if possible | |
322f4559 | 1029 | (if (doc-view-mode-p doc-view-doc-type) |
c17587fe SM |
1030 | (progn |
1031 | (doc-view-buffer-message) | |
de171465 | 1032 | (setf (doc-view-current-page) (or (doc-view-current-page) 1)) |
515357c2 | 1033 | (if (doc-view-already-converted-p) |
c17587fe SM |
1034 | (progn |
1035 | (message "DocView: using cached files!") | |
65073003 | 1036 | (doc-view-display (current-buffer) 'force)) |
c17587fe SM |
1037 | (doc-view-convert-current-doc)) |
1038 | (message | |
1039 | "%s" | |
1040 | (substitute-command-keys | |
1041 | (concat "Type \\[doc-view-toggle-display] to toggle between " | |
1042 | "editing or viewing the document.")))) | |
1043 | (message | |
1044 | "%s" | |
1045 | (substitute-command-keys | |
d99abf1b | 1046 | (concat "No image (png) support available or some conversion utility for " |
39a402e3 | 1047 | (file-name-extension doc-view-buffer-file-name)" files is missing. " |
515357c2 TH |
1048 | "Type \\[doc-view-toggle-display] to switch to an editing mode or " |
1049 | "\\[doc-view-open-text] to open a buffer showing the doc as text."))))) | |
94dbe99c | 1050 | |
e0385bf4 | 1051 | (defvar bookmark-make-record-function) |
069b4ce3 | 1052 | |
65073003 SM |
1053 | (defun doc-view-clone-buffer-hook () |
1054 | ;; FIXME: There are several potential problems linked with reconversion | |
1055 | ;; and auto-revert when we have indirect buffers because they share their | |
1056 | ;; /tmp cache directory. This sharing is good (you'd rather not reconvert | |
1057 | ;; for each clone), but that means that clones need to collaborate a bit. | |
1058 | ;; I guess it mostly means: detect when a reconversion process is already | |
1059 | ;; running, and run the sentinel in all clones. | |
515357c2 | 1060 | ;; |
de171465 | 1061 | ;; Maybe the clones should really have a separate /tmp directory |
65073003 SM |
1062 | ;; so they could have a different resolution and you could use clones |
1063 | ;; for zooming. | |
de171465 SM |
1064 | (remove-overlays (point-min) (point-max) 'doc-view t) |
1065 | (if (consp image-mode-winprops-alist) (setq image-mode-winprops-alist nil))) | |
65073003 | 1066 | |
eb79098b SM |
1067 | (defun doc-view-intersection (l1 l2) |
1068 | (let ((l ())) | |
1069 | (dolist (x l1) (if (memq x l2) (push x l))) | |
1070 | l)) | |
1071 | ||
640602f7 | 1072 | ;;;###autoload |
937cb3fb | 1073 | (defun doc-view-mode () |
640602f7 RS |
1074 | "Major mode in DocView buffers. |
1075 | You can use \\<doc-view-mode-map>\\[doc-view-toggle-display] to | |
5c1f16b0 SM |
1076 | toggle between displaying the document or editing it as text. |
1077 | \\{doc-view-mode-map}" | |
937cb3fb | 1078 | (interactive) |
f9adf05b TH |
1079 | |
1080 | (let* ((prev-major-mode (if (eq major-mode 'doc-view-mode) | |
1081 | doc-view-previous-major-mode | |
1082 | major-mode))) | |
1083 | (kill-all-local-variables) | |
1084 | (set (make-local-variable 'doc-view-previous-major-mode) prev-major-mode)) | |
1085 | ||
eb79098b SM |
1086 | ;; Figure out the document type. |
1087 | (let ((name-types | |
1088 | (when buffer-file-name | |
1089 | (cdr (assoc (file-name-extension buffer-file-name) | |
1090 | '(("dvi" dvi) | |
1091 | ("pdf" pdf) | |
1092 | ("epdf" pdf) | |
1093 | ("ps" ps) | |
1094 | ("eps" ps)))))) | |
1095 | (content-types | |
1096 | (save-excursion | |
1097 | (goto-char (point-min)) | |
1098 | (cond | |
1099 | ((looking-at "%!") '(ps)) | |
1100 | ((looking-at "%PDF") '(pdf)) | |
1101 | ((looking-at "\367\002") '(dvi)))))) | |
1102 | (set (make-local-variable 'doc-view-doc-type) | |
1103 | (car (or (doc-view-intersection name-types content-types) | |
1104 | (when (and name-types content-types) | |
1105 | (error "Conflicting types: name says %s but content says %s" | |
1106 | name-types content-types)) | |
1107 | name-types content-types | |
1108 | (error "Cannot determine the document type"))))) | |
5986c5c6 | 1109 | |
56741510 | 1110 | (doc-view-make-safe-dir doc-view-cache-directory) |
39a402e3 TH |
1111 | ;; Handle compressed files, remote files, files inside archives |
1112 | (set (make-local-variable 'doc-view-buffer-file-name) | |
1113 | (cond | |
1114 | (jka-compr-really-do-compress | |
1115 | (expand-file-name | |
1116 | (file-name-nondirectory | |
1117 | (file-name-sans-extension buffer-file-name)) | |
1118 | doc-view-cache-directory)) | |
cec1df02 SM |
1119 | ;; Is the file readable by local processes? |
1120 | ;; We used to use `file-remote-p' but it's unclear what it's | |
1121 | ;; supposed to return nil for things like local files accessed via | |
1122 | ;; `su' or via file://... | |
1123 | ((let ((file-name-handler-alist nil)) | |
1124 | (not (file-readable-p buffer-file-name))) | |
39a402e3 TH |
1125 | (expand-file-name |
1126 | (file-name-nondirectory buffer-file-name) | |
1127 | doc-view-cache-directory)) | |
1128 | (t buffer-file-name))) | |
1129 | (when (not (string= doc-view-buffer-file-name buffer-file-name)) | |
1130 | (write-region nil nil doc-view-buffer-file-name)) | |
1131 | ||
f9adf05b | 1132 | (add-hook 'change-major-mode-hook |
ec4853ab SM |
1133 | (lambda () |
1134 | (doc-view-kill-proc) | |
1135 | (remove-overlays (point-min) (point-max) 'doc-view t)) | |
f9adf05b | 1136 | nil t) |
65073003 | 1137 | (add-hook 'clone-indirect-buffer-hook 'doc-view-clone-buffer-hook nil t) |
ec4853ab | 1138 | (add-hook 'kill-buffer 'doc-view-kill-proc nil t) |
6f70aa33 | 1139 | |
de171465 SM |
1140 | (remove-overlays (point-min) (point-max) 'doc-view t) ;Just in case. |
1141 | ;; Keep track of display info ([vh]scroll, page number, overlay, ...) | |
1142 | ;; for each window in which this document is shown. | |
1143 | (add-hook 'image-mode-new-window-functions | |
1144 | 'doc-view-new-window-function nil t) | |
1145 | (image-mode-setup-winprops) | |
515357c2 | 1146 | |
f9adf05b | 1147 | (set (make-local-variable 'mode-line-position) |
de171465 | 1148 | '(" P" (:eval (number-to-string (doc-view-current-page))) |
f9adf05b | 1149 | "/" (:eval (number-to-string (length doc-view-current-files))))) |
38b5ca4a SM |
1150 | ;; Don't scroll unless the user specifically asked for it. |
1151 | (set (make-local-variable 'auto-hscroll-mode) nil) | |
f9adf05b TH |
1152 | (set (make-local-variable 'cursor-type) nil) |
1153 | (use-local-map doc-view-mode-map) | |
1154 | (set (make-local-variable 'after-revert-hook) 'doc-view-reconvert-doc) | |
e0385bf4 KF |
1155 | (set (make-local-variable 'bookmark-make-record-function) |
1156 | 'doc-view-bookmark-make-record) | |
f9adf05b TH |
1157 | (setq mode-name "DocView" |
1158 | buffer-read-only t | |
1159 | major-mode 'doc-view-mode) | |
1160 | (doc-view-initiate-display) | |
1161 | (run-mode-hooks 'doc-view-mode-hook)) | |
937cb3fb GM |
1162 | |
1163 | ;;;###autoload | |
1164 | (define-minor-mode doc-view-minor-mode | |
1165 | "Toggle Doc view minor mode. | |
1166 | With arg, turn Doc view minor mode on if arg is positive, off otherwise. | |
1167 | See the command `doc-view-mode' for more information on this mode." | |
1168 | nil " DocView" doc-view-minor-mode-map | |
1169 | :group 'doc-view | |
1170 | (when doc-view-minor-mode | |
1171 | (add-hook 'change-major-mode-hook (lambda () (doc-view-minor-mode -1)) nil t) | |
1172 | (message | |
1173 | "%s" | |
1174 | (substitute-command-keys | |
1175 | "Type \\[doc-view-toggle-display] to toggle between editing or viewing the document.")))) | |
94dbe99c TTN |
1176 | |
1177 | (defun doc-view-clear-cache () | |
1178 | "Delete the whole cache (`doc-view-cache-directory')." | |
1179 | (interactive) | |
515357c2 | 1180 | (dired-delete-file doc-view-cache-directory 'always)) |
94dbe99c TTN |
1181 | |
1182 | (defun doc-view-dired-cache () | |
1183 | "Open `dired' in `doc-view-cache-directory'." | |
1184 | (interactive) | |
1185 | (dired doc-view-cache-directory)) | |
1186 | ||
94dbe99c | 1187 | |
1666a6b3 TH |
1188 | ;;;; Bookmark integration |
1189 | ||
c123f7fe GM |
1190 | (declare-function bookmark-make-record-default "bookmark" |
1191 | (&optional point-only)) | |
a9f8b49b | 1192 | (declare-function bookmark-prop-get "bookmark" (bookmark prop)) |
43f8b275 | 1193 | (declare-function bookmark-default-handler "bookmark" (bmk)) |
a9f8b49b | 1194 | |
32a091dd | 1195 | (defun doc-view-bookmark-make-record () |
43f8b275 SM |
1196 | (nconc (bookmark-make-record-default) |
1197 | `((page . ,(doc-view-current-page)) | |
1198 | (handler . doc-view-bookmark-jump)))) | |
1666a6b3 | 1199 | |
069b4ce3 | 1200 | |
1666a6b3 TH |
1201 | ;;;###autoload |
1202 | (defun doc-view-bookmark-jump (bmk) | |
03e26a79 | 1203 | ;; This implements the `handler' function interface for record type |
e0385bf4 | 1204 | ;; returned by `doc-view-bookmark-make-record', which see. |
43f8b275 SM |
1205 | (prog1 (bookmark-default-handler bmk) |
1206 | (let ((page (bookmark-prop-get bmk 'page))) | |
1666a6b3 | 1207 | (when (not (eq major-mode 'doc-view-mode)) |
43f8b275 | 1208 | (doc-view-toggle-display)) |
a9f8b49b SM |
1209 | (with-selected-window |
1210 | (or (get-buffer-window (current-buffer) 0) | |
1211 | (selected-window)) | |
43f8b275 | 1212 | (doc-view-goto-page page))))) |
1666a6b3 | 1213 | |
069b4ce3 GM |
1214 | |
1215 | (provide 'doc-view) | |
1216 | ||
1217 | ;; Local Variables: | |
1218 | ;; mode: outline-minor | |
1219 | ;; End: | |
1220 | ||
aab2236f | 1221 | ;; arch-tag: 5d6e5c5e-095f-489e-b4e4-1ca90a7d79be |
94dbe99c | 1222 | ;;; doc-view.el ends here |