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b38b1ec0 SM |
1 | ;;; doc-view.el --- View PDF/PostScript/DVI files in Emacs -*- lexical-binding: t -*- |
2 | ||
94dbe99c | 3 | |
acaf905b | 4 | ;; Copyright (C) 2007-2012 Free Software Foundation, Inc. |
94dbe99c | 5 | ;; |
db8a5a18 TH |
6 | ;; Author: Tassilo Horn <tsdh@gnu.org> |
7 | ;; Maintainer: Tassilo Horn <tsdh@gnu.org> | |
94dbe99c | 8 | ;; Keywords: files, pdf, ps, dvi |
94dbe99c TTN |
9 | |
10 | ;; This file is part of GNU Emacs. | |
11 | ||
eb3fa2cf | 12 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
94dbe99c | 13 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
14 | ;; the Free Software Foundation, either version 3 of the License, or |
15 | ;; (at your option) any later version. | |
94dbe99c TTN |
16 | |
17 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;; GNU General Public License for more details. | |
21 | ||
22 | ;; You should have received a copy of the GNU General Public License | |
eb3fa2cf | 23 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
94dbe99c TTN |
24 | |
25 | ;;; Requirements: | |
26 | ||
4b378e75 | 27 | ;; doc-view.el requires GNU Emacs 22.1 or newer. You also need Ghostscript, |
1ecc9da7 TH |
28 | ;; `dvipdf' (comes with Ghostscript) or `dvipdfm' (comes with teTeX or TeXLive) |
29 | ;; and `pdftotext', which comes with xpdf (http://www.foolabs.com/xpdf/) or | |
30 | ;; poppler (http://poppler.freedesktop.org/). | |
94dbe99c TTN |
31 | |
32 | ;;; Commentary: | |
33 | ||
34 | ;; DocView is a document viewer for Emacs. It converts PDF, PS and DVI files | |
35 | ;; to a set of PNG files, one PNG for each page, and displays the PNG images | |
36 | ;; inside an Emacs buffer. This buffer uses `doc-view-mode' which provides | |
37 | ;; convenient key bindings for browsing the document. | |
38 | ;; | |
640602f7 | 39 | ;; To use it simply open a document file with |
94dbe99c | 40 | ;; |
640602f7 | 41 | ;; C-x C-f ~/path/to/document RET |
94dbe99c | 42 | ;; |
640602f7 RS |
43 | ;; and the document will be converted and displayed, if your emacs supports png |
44 | ;; images. With `C-c C-c' you can toggle between the rendered images | |
1f75e53d | 45 | ;; representation and the source text representation of the document. |
94dbe99c TTN |
46 | ;; |
47 | ;; Since conversion may take some time all the PNG images are cached in a | |
48 | ;; subdirectory of `doc-view-cache-directory' and reused when you want to view | |
640602f7 RS |
49 | ;; that file again. To reconvert a document hit `g' (`doc-view-reconvert-doc') |
50 | ;; when displaying the document. To delete all cached files use | |
94dbe99c TTN |
51 | ;; `doc-view-clear-cache'. To open the cache with dired, so that you can tidy |
52 | ;; it out use `doc-view-dired-cache'. | |
53 | ;; | |
54 | ;; When conversion in underway the first page will be displayed as soon as it | |
55 | ;; is available and the available pages are refreshed every | |
56 | ;; `doc-view-conversion-refresh-interval' seconds. If that variable is nil the | |
57 | ;; pages won't be displayed before conversion of the document finished | |
58 | ;; completely. | |
59 | ;; | |
db8a5a18 TH |
60 | ;; DocView lets you select a slice of the displayed pages. This slice |
61 | ;; will be remembered and applied to all pages of the current | |
62 | ;; document. This enables you to cut away the margins of a document | |
63 | ;; to save some space. To select a slice you can use | |
64 | ;; `doc-view-set-slice' (bound to `s s') which will query you for the | |
65 | ;; coordinates of the slice's top-left corner and its width and | |
66 | ;; height. A much more convenient way to do the same is offered by | |
67 | ;; the command `doc-view-set-slice-using-mouse' (bound to `s m'). | |
68 | ;; After invocation you only have to press mouse-1 at the top-left | |
69 | ;; corner and drag it to the bottom-right corner of the desired slice. | |
70 | ;; Even more accurate and convenient is to use | |
71 | ;; `doc-view-set-slice-from-bounding-box' (bound to `s b') which uses | |
72 | ;; the BoundingBox information of the current page to set an optimal | |
73 | ;; slice. To reset the slice use `doc-view-reset-slice' (bound to `s | |
74 | ;; r'). | |
94dbe99c | 75 | ;; |
94dbe99c TTN |
76 | ;; You can also search within the document. The command `doc-view-search' |
77 | ;; (bound to `C-s') queries for a search regexp and initializes a list of all | |
78 | ;; matching pages and messages how many match-pages were found. After that you | |
7baca0fa JL |
79 | ;; can jump to the next page containing a match with an additional `C-s'. With |
80 | ;; `C-r' you can do the same, but backwards. To search for a new regexp give a | |
81 | ;; prefix arg to one of the search functions, e.g. by typing `C-u C-s'. The | |
82 | ;; searching works by using a plain text representation of the document. If | |
a8ce3d17 | 83 | ;; that doesn't already exist the first invocation of `doc-view-search' (or |
7baca0fa JL |
84 | ;; `doc-view-search-backward') starts the conversion. When that finishes and |
85 | ;; you're still viewing the document (i.e. you didn't switch to another buffer) | |
86 | ;; you're queried for the regexp then. | |
640602f7 RS |
87 | ;; |
88 | ;; Dired users can simply hit `v' on a document file. If it's a PS, PDF or DVI | |
89 | ;; it will be opened using `doc-view-mode'. | |
90 | ;; | |
94dbe99c TTN |
91 | |
92 | ;;; Configuration: | |
93 | ||
640602f7 RS |
94 | ;; If the images are too small or too big you should set the "-rXXX" option in |
95 | ;; `doc-view-ghostscript-options' to another value. (The bigger your screen, | |
96 | ;; the higher the value.) | |
94dbe99c TTN |
97 | ;; |
98 | ;; This and all other options can be set with the customization interface. | |
99 | ;; Simply do | |
100 | ;; | |
101 | ;; M-x customize-group RET doc-view RET | |
102 | ;; | |
103 | ;; and modify them to your needs. | |
104 | ||
34065e5e | 105 | ;;; Todo: |
94dbe99c | 106 | |
56741510 SM |
107 | ;; - add print command. |
108 | ;; - share more code with image-mode. | |
f4c75497 | 109 | ;; - better menu. |
f4c75497 | 110 | ;; - Bind slicing to a drag event. |
cec1df02 | 111 | ;; - zoom the region around the cursor (like xdvi). |
c17587fe SM |
112 | ;; - get rid of the silly arrow in the fringe. |
113 | ;; - improve anti-aliasing (pdf-utils gets it better). | |
f4c75497 | 114 | |
34065e5e JL |
115 | ;;;; About isearch support |
116 | ||
117 | ;; I tried implementing isearch by setting | |
118 | ;; `isearch-search-fun-function' buffer-locally, but that didn't | |
119 | ;; work too good. The function doing the real search was called | |
120 | ;; endlessly somehow. But even if we'd get that working no real | |
121 | ;; isearch feeling comes up due to the missing match highlighting. | |
122 | ;; Currently I display all lines containing a match in a tooltip and | |
123 | ;; each C-s or C-r jumps directly to the next/previous page with a | |
124 | ;; match. With isearch we could only display the current match. So | |
125 | ;; we had to decide if another C-s jumps to the next page with a | |
126 | ;; match (thus only the first match in a page will be displayed in a | |
127 | ;; tooltip) or to the next match, which would do nothing visible | |
128 | ;; (except the tooltip) if the next match is on the same page. | |
129 | ||
130 | ;; And it's much slower than the current search facility, because | |
ee7683eb | 131 | ;; isearch really searches for each step forward or backward whereas |
34065e5e JL |
132 | ;; the current approach searches once and then it knows to which |
133 | ;; pages to jump. | |
134 | ||
135 | ;; Anyway, if someone with better isearch knowledge wants to give it a try, | |
136 | ;; feel free to do it. --Tassilo | |
137 | ||
138 | ;;; Code: | |
139 | ||
f58e0fd5 | 140 | (eval-when-compile (require 'cl-lib)) |
94dbe99c | 141 | (require 'dired) |
414dd971 | 142 | (require 'image-mode) |
7baca0fa | 143 | (require 'jka-compr) |
94dbe99c TTN |
144 | |
145 | ;;;; Customization Options | |
146 | ||
147 | (defgroup doc-view nil | |
148 | "In-buffer viewer for PDF, PostScript and DVI files." | |
149 | :link '(function-link doc-view) | |
150 | :version "22.2" | |
151 | :group 'applications | |
ff90f4b0 | 152 | :group 'data |
94dbe99c TTN |
153 | :group 'multimedia |
154 | :prefix "doc-view-") | |
155 | ||
d0af9f77 | 156 | (defcustom doc-view-ghostscript-program "gs" |
94dbe99c | 157 | "Program to convert PS and PDF files to PNG." |
c9a9a5e3 | 158 | :type 'file |
94dbe99c TTN |
159 | :group 'doc-view) |
160 | ||
161 | (defcustom doc-view-ghostscript-options | |
6a658a30 | 162 | '("-dSAFER" ;; Avoid security problems when rendering files from untrusted |
94d11cb5 | 163 | ;; sources. |
6a658a30 | 164 | "-dNOPAUSE" "-sDEVICE=png16m" "-dTextAlphaBits=4" |
05477667 | 165 | "-dBATCH" "-dGraphicsAlphaBits=4" "-dQUIET") |
4b378e75 | 166 | "A list of options to give to ghostscript." |
c9a9a5e3 | 167 | :type '(repeat string) |
94dbe99c TTN |
168 | :group 'doc-view) |
169 | ||
05477667 SM |
170 | (defcustom doc-view-resolution 100 |
171 | "Dots per inch resolution used to render the documents. | |
172 | Higher values result in larger images." | |
9efa445f DN |
173 | :type 'number |
174 | :group 'doc-view) | |
05477667 | 175 | |
875c044a TH |
176 | (defcustom doc-view-image-width 850 |
177 | "Default image width. | |
178 | Has only an effect if imagemagick support is compiled into emacs." | |
2bed3f04 | 179 | :version "24.1" |
875c044a TH |
180 | :type 'number |
181 | :group 'doc-view) | |
182 | ||
d0af9f77 | 183 | (defcustom doc-view-dvipdfm-program "dvipdfm" |
94dbe99c TTN |
184 | "Program to convert DVI files to PDF. |
185 | ||
186 | DVI file will be converted to PDF before the resulting PDF is | |
53d4c024 TH |
187 | converted to PNG. |
188 | ||
189 | If this and `doc-view-dvipdf-program' are set, | |
190 | `doc-view-dvipdf-program' will be preferred." | |
191 | :type 'file | |
192 | :group 'doc-view) | |
193 | ||
d0af9f77 | 194 | (defcustom doc-view-dvipdf-program "dvipdf" |
53d4c024 TH |
195 | "Program to convert DVI files to PDF. |
196 | ||
197 | DVI file will be converted to PDF before the resulting PDF is | |
198 | converted to PNG. | |
199 | ||
200 | If this and `doc-view-dvipdfm-program' are set, | |
201 | `doc-view-dvipdf-program' will be preferred." | |
c9a9a5e3 | 202 | :type 'file |
94dbe99c TTN |
203 | :group 'doc-view) |
204 | ||
d0af9f77 | 205 | (defcustom doc-view-unoconv-program "unoconv" |
95e16d17 TH |
206 | "Program to convert any file type readable by OpenOffice.org to PDF. |
207 | ||
208 | Needed for viewing OpenOffice.org (and MS Office) files." | |
2bed3f04 | 209 | :version "24.1" |
95e16d17 TH |
210 | :type 'file |
211 | :group 'doc-view) | |
212 | ||
d0af9f77 | 213 | (defcustom doc-view-ps2pdf-program "ps2pdf" |
94dbe99c TTN |
214 | "Program to convert PS files to PDF. |
215 | ||
216 | PS files will be converted to PDF before searching is possible." | |
c9a9a5e3 | 217 | :type 'file |
94dbe99c TTN |
218 | :group 'doc-view) |
219 | ||
d0af9f77 | 220 | (defcustom doc-view-pdftotext-program "pdftotext" |
94dbe99c TTN |
221 | "Program to convert PDF files to plain text. |
222 | ||
223 | Needed for searching." | |
c9a9a5e3 | 224 | :type 'file |
94dbe99c TTN |
225 | :group 'doc-view) |
226 | ||
c17587fe | 227 | (defcustom doc-view-cache-directory |
8aafd651 | 228 | (expand-file-name (format "docview%d" (user-uid)) |
bce6be12 | 229 | temporary-file-directory) |
94dbe99c | 230 | "The base directory, where the PNG images will be saved." |
c9a9a5e3 | 231 | :type 'directory |
94dbe99c TTN |
232 | :group 'doc-view) |
233 | ||
56741510 SM |
234 | (defvar doc-view-conversion-buffer " *doc-view conversion output*" |
235 | "The buffer where messages from the converter programs go to.") | |
94dbe99c | 236 | |
56741510 | 237 | (defcustom doc-view-conversion-refresh-interval 1 |
1f75e53d GM |
238 | "Interval in seconds between refreshes of the DocView buffer while converting. |
239 | After such a refresh newly converted pages will be available for | |
94dbe99c TTN |
240 | viewing. If set to nil there won't be any refreshes and the |
241 | pages won't be displayed before conversion of the whole document | |
242 | has finished." | |
c9a9a5e3 | 243 | :type 'integer |
94dbe99c TTN |
244 | :group 'doc-view) |
245 | ||
0a745733 | 246 | (defcustom doc-view-continuous nil |
aefcadb6 JL |
247 | "In Continuous mode reaching the page edge advances to next/previous page. |
248 | When non-nil, scrolling a line upward at the bottom edge of the page | |
249 | moves to the next page, and scrolling a line downward at the top edge | |
250 | of the page moves to the previous page." | |
251 | :type 'boolean | |
252 | :group 'doc-view | |
253 | :version "23.2") | |
254 | ||
94dbe99c TTN |
255 | ;;;; Internal Variables |
256 | ||
de171465 | 257 | (defun doc-view-new-window-function (winprops) |
83600dc8 SM |
258 | ;; (message "New window %s for buf %s" (car winprops) (current-buffer)) |
259 | (cl-assert (or (eq t (car winprops)) | |
260 | (eq (window-buffer (car winprops)) (current-buffer)))) | |
de171465 SM |
261 | (let ((ol (image-mode-window-get 'overlay winprops))) |
262 | (if ol | |
0bca393f | 263 | (progn |
83600dc8 SM |
264 | (setq ol (copy-overlay ol)) |
265 | ;; `ol' might actually be dead. | |
266 | (move-overlay ol (point-min) (point-max))) | |
de171465 SM |
267 | (setq ol (make-overlay (point-min) (point-max) nil t)) |
268 | (overlay-put ol 'doc-view t)) | |
269 | (overlay-put ol 'window (car winprops)) | |
83600dc8 SM |
270 | (unless (windowp (car winprops)) |
271 | ;; It's a pseudo entry. Let's make sure it's not displayed (the | |
272 | ;; `window' property is only effective if its value is a window). | |
273 | (cl-assert (eq t (car winprops))) | |
274 | (delete-overlay ol)) | |
de171465 | 275 | (image-mode-window-put 'overlay ol winprops))) |
94dbe99c | 276 | |
de171465 | 277 | (defvar doc-view-current-files nil |
94dbe99c | 278 | "Only used internally.") |
ec4853ab | 279 | (make-variable-buffer-local 'doc-view-current-files) |
94dbe99c | 280 | |
ec4853ab | 281 | (defvar doc-view-current-converter-processes nil |
94dbe99c | 282 | "Only used internally.") |
ec4853ab | 283 | (make-variable-buffer-local 'doc-view-current-converter-processes) |
94dbe99c TTN |
284 | |
285 | (defvar doc-view-current-timer nil | |
286 | "Only used internally.") | |
ec4853ab | 287 | (make-variable-buffer-local 'doc-view-current-timer) |
94dbe99c | 288 | |
94dbe99c TTN |
289 | (defvar doc-view-current-cache-dir nil |
290 | "Only used internally.") | |
ec4853ab | 291 | (make-variable-buffer-local 'doc-view-current-cache-dir) |
94dbe99c TTN |
292 | |
293 | (defvar doc-view-current-search-matches nil | |
294 | "Only used internally.") | |
ec4853ab | 295 | (make-variable-buffer-local 'doc-view-current-search-matches) |
94dbe99c | 296 | |
d99abf1b RS |
297 | (defvar doc-view-pending-cache-flush nil |
298 | "Only used internally.") | |
94dbe99c | 299 | |
937cb3fb | 300 | (defvar doc-view-previous-major-mode nil |
640602f7 RS |
301 | "Only used internally.") |
302 | ||
39a402e3 TH |
303 | (defvar doc-view-buffer-file-name nil |
304 | "Only used internally. | |
305 | The file name used for conversion. Normally it's the same as | |
306 | `buffer-file-name', but for remote files, compressed files and | |
307 | files inside an archive it is a temporary copy of | |
308 | the (uncompressed, extracted) file residing in | |
309 | `doc-view-cache-directory'.") | |
310 | ||
eb79098b SM |
311 | (defvar doc-view-doc-type nil |
312 | "The type of document in the current buffer. | |
313 | Can be `dvi', `pdf', or `ps'.") | |
314 | ||
640602f7 | 315 | ;;;; DocView Keymaps |
94dbe99c TTN |
316 | |
317 | (defvar doc-view-mode-map | |
318 | (let ((map (make-sparse-keymap))) | |
d2d7e96c | 319 | (set-keymap-parent map image-mode-map) |
94dbe99c TTN |
320 | ;; Navigation in the document |
321 | (define-key map (kbd "n") 'doc-view-next-page) | |
322 | (define-key map (kbd "p") 'doc-view-previous-page) | |
eb8d0216 SM |
323 | (define-key map (kbd "<next>") 'forward-page) |
324 | (define-key map (kbd "<prior>") 'backward-page) | |
325 | (define-key map [remap forward-page] 'doc-view-next-page) | |
326 | (define-key map [remap backward-page] 'doc-view-previous-page) | |
94dbe99c TTN |
327 | (define-key map (kbd "SPC") 'doc-view-scroll-up-or-next-page) |
328 | (define-key map (kbd "DEL") 'doc-view-scroll-down-or-previous-page) | |
aefcadb6 JL |
329 | (define-key map (kbd "C-n") 'doc-view-next-line-or-next-page) |
330 | (define-key map (kbd "<down>") 'doc-view-next-line-or-next-page) | |
331 | (define-key map (kbd "C-p") 'doc-view-previous-line-or-previous-page) | |
332 | (define-key map (kbd "<up>") 'doc-view-previous-line-or-previous-page) | |
94dbe99c TTN |
333 | (define-key map (kbd "M-<") 'doc-view-first-page) |
334 | (define-key map (kbd "M->") 'doc-view-last-page) | |
7656fe61 | 335 | (define-key map [remap goto-line] 'doc-view-goto-page) |
4376876e | 336 | (define-key map (kbd "RET") 'image-next-line) |
05477667 SM |
337 | ;; Zoom in/out. |
338 | (define-key map "+" 'doc-view-enlarge) | |
339 | (define-key map "-" 'doc-view-shrink) | |
d7b89879 TH |
340 | ;; Fit the image to the window |
341 | (define-key map "W" 'doc-view-fit-width-to-window) | |
342 | (define-key map "H" 'doc-view-fit-height-to-window) | |
343 | (define-key map "P" 'doc-view-fit-page-to-window) | |
d2d7e96c | 344 | ;; Killing the buffer (and the process) |
94dbe99c | 345 | (define-key map (kbd "k") 'doc-view-kill-proc-and-buffer) |
937cb3fb | 346 | (define-key map (kbd "K") 'doc-view-kill-proc) |
94dbe99c TTN |
347 | ;; Slicing the image |
348 | (define-key map (kbd "s s") 'doc-view-set-slice) | |
349 | (define-key map (kbd "s m") 'doc-view-set-slice-using-mouse) | |
db8a5a18 | 350 | (define-key map (kbd "s b") 'doc-view-set-slice-from-bounding-box) |
94dbe99c TTN |
351 | (define-key map (kbd "s r") 'doc-view-reset-slice) |
352 | ;; Searching | |
353 | (define-key map (kbd "C-s") 'doc-view-search) | |
354 | (define-key map (kbd "<find>") 'doc-view-search) | |
7baca0fa | 355 | (define-key map (kbd "C-r") 'doc-view-search-backward) |
94dbe99c TTN |
356 | ;; Show the tooltip |
357 | (define-key map (kbd "C-t") 'doc-view-show-tooltip) | |
640602f7 RS |
358 | ;; Toggle between text and image display or editing |
359 | (define-key map (kbd "C-c C-c") 'doc-view-toggle-display) | |
515357c2 TH |
360 | ;; Open a new buffer with doc's text contents |
361 | (define-key map (kbd "C-c C-t") 'doc-view-open-text) | |
0bca393f SM |
362 | ;; Reconvert the current document. Don't just use revert-buffer |
363 | ;; because that resets the scale factor, the page number, ... | |
364 | (define-key map (kbd "g") 'doc-view-revert-buffer) | |
365 | (define-key map (kbd "r") 'doc-view-revert-buffer) | |
94dbe99c | 366 | map) |
640602f7 RS |
367 | "Keymap used by `doc-view-mode' when displaying a doc as a set of images.") |
368 | ||
0bca393f SM |
369 | (defun doc-view-revert-buffer (&optional ignore-auto noconfirm) |
370 | "Like `revert-buffer', but preserves the buffer's current modes." | |
371 | ;; FIXME: this should probably be moved to files.el and used for | |
372 | ;; most/all "g" bindings to revert-buffer. | |
373 | (interactive (list (not current-prefix-arg))) | |
374 | (revert-buffer ignore-auto noconfirm 'preserve-modes)) | |
375 | ||
376 | ||
f4c75497 SM |
377 | (easy-menu-define doc-view-menu doc-view-mode-map |
378 | "Menu for Doc View mode." | |
379 | '("DocView" | |
0a745733 JL |
380 | ["Toggle display" doc-view-toggle-display] |
381 | ("Continuous" | |
382 | ["Off" (setq doc-view-continuous nil) | |
383 | :style radio :selected (eq doc-view-continuous nil)] | |
384 | ["On" (setq doc-view-continuous t) | |
385 | :style radio :selected (eq doc-view-continuous t)] | |
386 | "---" | |
387 | ["Save as Default" | |
388 | (customize-save-variable 'doc-view-continuous doc-view-continuous) t] | |
389 | ) | |
390 | "---" | |
f4c75497 | 391 | ["Set Slice" doc-view-set-slice-using-mouse] |
db8a5a18 | 392 | ["Set Slice (BoundingBox)" doc-view-set-slice-from-bounding-box] |
f4c75497 SM |
393 | ["Set Slice (manual)" doc-view-set-slice] |
394 | ["Reset Slice" doc-view-reset-slice] | |
395 | "---" | |
396 | ["Search" doc-view-search] | |
7baca0fa | 397 | ["Search Backwards" doc-view-search-backward] |
f4c75497 SM |
398 | )) |
399 | ||
937cb3fb | 400 | (defvar doc-view-minor-mode-map |
640602f7 RS |
401 | (let ((map (make-sparse-keymap))) |
402 | ;; Toggle between text and image display or editing | |
403 | (define-key map (kbd "C-c C-c") 'doc-view-toggle-display) | |
640602f7 | 404 | map) |
937cb3fb | 405 | "Keymap used by `doc-minor-view-mode'.") |
94dbe99c TTN |
406 | |
407 | ;;;; Navigation Commands | |
408 | ||
160dfe43 SM |
409 | (defmacro doc-view-current-page (&optional win) |
410 | `(image-mode-window-get 'page ,win)) | |
de171465 SM |
411 | (defmacro doc-view-current-info () `(image-mode-window-get 'info)) |
412 | (defmacro doc-view-current-overlay () `(image-mode-window-get 'overlay)) | |
413 | (defmacro doc-view-current-image () `(image-mode-window-get 'image)) | |
414 | (defmacro doc-view-current-slice () `(image-mode-window-get 'slice)) | |
415 | ||
bdd42899 SM |
416 | (defun doc-view-last-page-number () |
417 | (length doc-view-current-files)) | |
418 | ||
94dbe99c TTN |
419 | (defun doc-view-goto-page (page) |
420 | "View the page given by PAGE." | |
421 | (interactive "nPage: ") | |
bdd42899 | 422 | (let ((len (doc-view-last-page-number)) |
bc19637d | 423 | (hscroll (window-hscroll))) |
94dbe99c | 424 | (if (< page 1) |
1ca678aa | 425 | (setq page 1) |
56741510 SM |
426 | (when (and (> page len) |
427 | ;; As long as the converter is running, we don't know | |
428 | ;; how many pages will be available. | |
ec4853ab | 429 | (null doc-view-current-converter-processes)) |
1ca678aa | 430 | (setq page len))) |
de171465 SM |
431 | (setf (doc-view-current-page) page |
432 | (doc-view-current-info) | |
1ca678aa MC |
433 | (concat |
434 | (propertize | |
de171465 | 435 | (format "Page %d of %d." page len) 'face 'bold) |
1ca678aa | 436 | ;; Tell user if converting isn't finished yet |
ec4853ab | 437 | (if doc-view-current-converter-processes |
1ca678aa MC |
438 | " (still converting...)\n" |
439 | "\n") | |
440 | ;; Display context infos if this page matches the last search | |
441 | (when (and doc-view-current-search-matches | |
de171465 | 442 | (assq page doc-view-current-search-matches)) |
1ca678aa MC |
443 | (concat (propertize "Search matches:\n" 'face 'bold) |
444 | (let ((contexts "")) | |
de171465 | 445 | (dolist (m (cdr (assq page |
1ca678aa MC |
446 | doc-view-current-search-matches))) |
447 | (setq contexts (concat contexts " - \"" m "\"\n"))) | |
448 | contexts))))) | |
94dbe99c | 449 | ;; Update the buffer |
56741510 SM |
450 | ;; We used to find the file name from doc-view-current-files but |
451 | ;; that's not right if the pages are not generated sequentially | |
452 | ;; or if the page isn't in doc-view-current-files yet. | |
ec4853ab SM |
453 | (let ((file (expand-file-name (format "page-%d.png" page) |
454 | (doc-view-current-cache-dir)))) | |
455 | (doc-view-insert-image file :pointer 'arrow) | |
bc19637d | 456 | (set-window-hscroll (selected-window) hscroll) |
ec4853ab SM |
457 | (when (and (not (file-exists-p file)) |
458 | doc-view-current-converter-processes) | |
459 | ;; The PNG file hasn't been generated yet. | |
460 | (doc-view-pdf->png-1 doc-view-buffer-file-name file page | |
94d11cb5 | 461 | (let ((win (selected-window))) |
ec4853ab SM |
462 | (lambda () |
463 | (and (eq (current-buffer) (window-buffer win)) | |
464 | ;; If we changed page in the mean | |
465 | ;; time, don't mess things up. | |
466 | (eq (doc-view-current-page win) page) | |
bdd42899 SM |
467 | ;; Make sure we don't infloop. |
468 | (file-readable-p file) | |
ec4853ab | 469 | (with-selected-window win |
94d11cb5 | 470 | (doc-view-goto-page page)))))))) |
de171465 SM |
471 | (overlay-put (doc-view-current-overlay) |
472 | 'help-echo (doc-view-current-info)))) | |
94dbe99c TTN |
473 | |
474 | (defun doc-view-next-page (&optional arg) | |
475 | "Browse ARG pages forward." | |
476 | (interactive "p") | |
de171465 | 477 | (doc-view-goto-page (+ (doc-view-current-page) (or arg 1)))) |
94dbe99c TTN |
478 | |
479 | (defun doc-view-previous-page (&optional arg) | |
480 | "Browse ARG pages backward." | |
481 | (interactive "p") | |
de171465 | 482 | (doc-view-goto-page (- (doc-view-current-page) (or arg 1)))) |
94dbe99c TTN |
483 | |
484 | (defun doc-view-first-page () | |
485 | "View the first page." | |
486 | (interactive) | |
487 | (doc-view-goto-page 1)) | |
488 | ||
489 | (defun doc-view-last-page () | |
490 | "View the last page." | |
491 | (interactive) | |
bdd42899 | 492 | (doc-view-goto-page (doc-view-last-page-number))) |
94dbe99c | 493 | |
7d6b4d3c JL |
494 | (defun doc-view-scroll-up-or-next-page (&optional arg) |
495 | "Scroll page up ARG lines if possible, else goto next page. | |
0a745733 | 496 | When `doc-view-continuous' is non-nil, scrolling upward |
7d6b4d3c JL |
497 | at the bottom edge of the page moves to the next page. |
498 | Otherwise, goto next page only on typing SPC (ARG is nil)." | |
499 | (interactive "P") | |
0a745733 | 500 | (if (or doc-view-continuous (null arg)) |
7d6b4d3c JL |
501 | (let ((hscroll (window-hscroll)) |
502 | (cur-page (doc-view-current-page))) | |
503 | (when (= (window-vscroll) (image-scroll-up arg)) | |
504 | (doc-view-next-page) | |
505 | (when (/= cur-page (doc-view-current-page)) | |
506 | (image-bob) | |
507 | (image-bol 1)) | |
508 | (set-window-hscroll (selected-window) hscroll))) | |
509 | (image-scroll-up arg))) | |
510 | ||
511 | (defun doc-view-scroll-down-or-previous-page (&optional arg) | |
512 | "Scroll page down ARG lines if possible, else goto previous page. | |
0a745733 | 513 | When `doc-view-continuous' is non-nil, scrolling downward |
7d6b4d3c JL |
514 | at the top edge of the page moves to the previous page. |
515 | Otherwise, goto previous page only on typing DEL (ARG is nil)." | |
516 | (interactive "P") | |
0a745733 | 517 | (if (or doc-view-continuous (null arg)) |
7d6b4d3c JL |
518 | (let ((hscroll (window-hscroll)) |
519 | (cur-page (doc-view-current-page))) | |
520 | (when (= (window-vscroll) (image-scroll-down arg)) | |
521 | (doc-view-previous-page) | |
522 | (when (/= cur-page (doc-view-current-page)) | |
523 | (image-eob) | |
524 | (image-bol 1)) | |
525 | (set-window-hscroll (selected-window) hscroll))) | |
526 | (image-scroll-down arg))) | |
527 | ||
528 | (defun doc-view-next-line-or-next-page (&optional arg) | |
529 | "Scroll upward by ARG lines if possible, else goto next page. | |
0a745733 | 530 | When `doc-view-continuous' is non-nil, scrolling a line upward |
7d6b4d3c | 531 | at the bottom edge of the page moves to the next page." |
aefcadb6 | 532 | (interactive "p") |
0a745733 | 533 | (if doc-view-continuous |
aefcadb6 JL |
534 | (let ((hscroll (window-hscroll)) |
535 | (cur-page (doc-view-current-page))) | |
7d6b4d3c | 536 | (when (= (window-vscroll) (image-next-line arg)) |
aefcadb6 JL |
537 | (doc-view-next-page) |
538 | (when (/= cur-page (doc-view-current-page)) | |
539 | (image-bob) | |
540 | (image-bol 1)) | |
541 | (set-window-hscroll (selected-window) hscroll))) | |
542 | (image-next-line 1))) | |
543 | ||
7d6b4d3c JL |
544 | (defun doc-view-previous-line-or-previous-page (&optional arg) |
545 | "Scroll downward by ARG lines if possible, else goto previous page. | |
0a745733 | 546 | When `doc-view-continuous' is non-nil, scrolling a line downward |
aefcadb6 JL |
547 | at the top edge of the page moves to the previous page." |
548 | (interactive "p") | |
0a745733 | 549 | (if doc-view-continuous |
aefcadb6 JL |
550 | (let ((hscroll (window-hscroll)) |
551 | (cur-page (doc-view-current-page))) | |
7d6b4d3c | 552 | (when (= (window-vscroll) (image-previous-line arg)) |
aefcadb6 JL |
553 | (doc-view-previous-page) |
554 | (when (/= cur-page (doc-view-current-page)) | |
555 | (image-eob) | |
556 | (image-bol 1)) | |
557 | (set-window-hscroll (selected-window) hscroll))) | |
7d6b4d3c | 558 | (image-previous-line arg))) |
aefcadb6 | 559 | |
937cb3fb GM |
560 | ;;;; Utility Functions |
561 | ||
640602f7 | 562 | (defun doc-view-kill-proc () |
ec4853ab | 563 | "Kill the current converter process(es)." |
640602f7 | 564 | (interactive) |
bdd42899 | 565 | (while (consp doc-view-current-converter-processes) |
83600dc8 SM |
566 | (ignore-errors ;; Some entries might not be processes, and maybe |
567 | ;; some are dead already? | |
ec4853ab | 568 | (kill-process (pop doc-view-current-converter-processes)))) |
640602f7 RS |
569 | (when doc-view-current-timer |
570 | (cancel-timer doc-view-current-timer) | |
571 | (setq doc-view-current-timer nil)) | |
572 | (setq mode-line-process nil)) | |
573 | ||
94dbe99c TTN |
574 | (defun doc-view-kill-proc-and-buffer () |
575 | "Kill the current converter process and buffer." | |
576 | (interactive) | |
640602f7 | 577 | (doc-view-kill-proc) |
94dbe99c | 578 | (when (eq major-mode 'doc-view-mode) |
94dbe99c TTN |
579 | (kill-buffer (current-buffer)))) |
580 | ||
c17587fe SM |
581 | (defun doc-view-make-safe-dir (dir) |
582 | (condition-case nil | |
583 | (let ((umask (default-file-modes))) | |
c82f64de LMI |
584 | (unwind-protect |
585 | (progn | |
586 | ;; Create temp files with strict access rights. It's easy to | |
587 | ;; loosen them later, whereas it's impossible to close the | |
588 | ;; time-window of loose permissions otherwise. | |
589 | (set-default-file-modes #o0700) | |
590 | (make-directory dir)) | |
591 | ;; Reset the umask. | |
592 | (set-default-file-modes umask))) | |
c17587fe | 593 | (file-already-exists |
c82f64de LMI |
594 | (when (file-symlink-p dir) |
595 | (error "Danger: %s points to a symbolic link" dir)) | |
c17587fe SM |
596 | ;; In case it was created earlier with looser rights. |
597 | ;; We could check the mode info returned by file-attributes, but it's | |
598 | ;; a pain to parse and it may not tell you what we want under | |
599 | ;; non-standard file-systems. So let's just say what we want and let | |
600 | ;; the underlying C code and file-system figure it out. | |
601 | ;; This also ends up checking a bunch of useful conditions: it makes | |
602 | ;; sure we have write-access to the directory and that we own it, thus | |
603 | ;; closing a bunch of security holes. | |
c82f64de LMI |
604 | (condition-case error |
605 | (set-file-modes dir #o0700) | |
606 | (file-error | |
607 | (error | |
608 | (format "Unable to use temporary directory %s: %s" | |
609 | dir (mapconcat 'identity (cdr error) " ")))))))) | |
c17587fe | 610 | |
937cb3fb GM |
611 | (defun doc-view-current-cache-dir () |
612 | "Return the directory where the png files of the current doc should be saved. | |
613 | It's a subdirectory of `doc-view-cache-directory'." | |
614 | (if doc-view-current-cache-dir | |
615 | doc-view-current-cache-dir | |
c17587fe SM |
616 | ;; Try and make sure doc-view-cache-directory exists and is safe. |
617 | (doc-view-make-safe-dir doc-view-cache-directory) | |
618 | ;; Now compute the subdirectory to use. | |
937cb3fb GM |
619 | (setq doc-view-current-cache-dir |
620 | (file-name-as-directory | |
c17587fe | 621 | (expand-file-name |
5e9fde5e | 622 | (concat (file-name-nondirectory doc-view-buffer-file-name) |
39a402e3 TH |
623 | "-" |
624 | (let ((file doc-view-buffer-file-name)) | |
625 | (with-temp-buffer | |
86903c81 | 626 | (set-buffer-multibyte nil) |
39a402e3 TH |
627 | (insert-file-contents-literally file) |
628 | (md5 (current-buffer))))) | |
c17587fe | 629 | doc-view-cache-directory))))) |
937cb3fb GM |
630 | |
631 | (defun doc-view-remove-if (predicate list) | |
632 | "Return LIST with all items removed that satisfy PREDICATE." | |
633 | (let (new-list) | |
8eda563d | 634 | (dolist (item list) |
937cb3fb | 635 | (when (not (funcall predicate item)) |
8eda563d JB |
636 | (setq new-list (cons item new-list)))) |
637 | (nreverse new-list))) | |
937cb3fb | 638 | |
789ab9d4 RS |
639 | ;;;###autoload |
640 | (defun doc-view-mode-p (type) | |
95e16d17 TH |
641 | "Return non-nil if document type TYPE is available for `doc-view'. |
642 | Document types are symbols like `dvi', `ps', `pdf', or `odf' (any | |
643 | OpenDocument format)." | |
789ab9d4 | 644 | (and (display-graphic-p) |
c44d54b3 TH |
645 | (or (image-type-available-p 'imagemagick) |
646 | (image-type-available-p 'png)) | |
789ab9d4 RS |
647 | (cond |
648 | ((eq type 'dvi) | |
649 | (and (doc-view-mode-p 'pdf) | |
53d4c024 TH |
650 | (or (and doc-view-dvipdf-program |
651 | (executable-find doc-view-dvipdf-program)) | |
652 | (and doc-view-dvipdfm-program | |
653 | (executable-find doc-view-dvipdfm-program))))) | |
622face2 | 654 | ((or (eq type 'postscript) (eq type 'ps) (eq type 'eps) |
789ab9d4 RS |
655 | (eq type 'pdf)) |
656 | (and doc-view-ghostscript-program | |
657 | (executable-find doc-view-ghostscript-program))) | |
95e16d17 TH |
658 | ((eq type 'odf) |
659 | (and doc-view-unoconv-program | |
660 | (executable-find doc-view-unoconv-program) | |
661 | (doc-view-mode-p 'pdf))) | |
789ab9d4 RS |
662 | (t ;; unknown image type |
663 | nil)))) | |
664 | ||
94dbe99c TTN |
665 | ;;;; Conversion Functions |
666 | ||
05477667 SM |
667 | (defvar doc-view-shrink-factor 1.125) |
668 | ||
669 | (defun doc-view-enlarge (factor) | |
83600dc8 | 670 | "Enlarge the document by FACTOR." |
05477667 | 671 | (interactive (list doc-view-shrink-factor)) |
875c044a TH |
672 | (if (eq (plist-get (cdr (doc-view-current-image)) :type) |
673 | 'imagemagick) | |
83600dc8 SM |
674 | ;; ImageMagick supports on-the-fly-rescaling. |
675 | (let ((new (ceiling (* factor doc-view-image-width)))) | |
676 | (unless (equal new doc-view-image-width) | |
677 | (set (make-local-variable 'doc-view-image-width) new) | |
678 | (doc-view-insert-image | |
679 | (plist-get (cdr (doc-view-current-image)) :file) | |
680 | :width doc-view-image-width))) | |
681 | (let ((new (ceiling (* factor doc-view-resolution)))) | |
682 | (unless (equal new doc-view-resolution) | |
683 | (set (make-local-variable 'doc-view-resolution) new) | |
684 | (doc-view-reconvert-doc))))) | |
05477667 SM |
685 | |
686 | (defun doc-view-shrink (factor) | |
687 | "Shrink the document." | |
688 | (interactive (list doc-view-shrink-factor)) | |
689 | (doc-view-enlarge (/ 1.0 factor))) | |
690 | ||
d7b89879 TH |
691 | (defun doc-view-fit-width-to-window () |
692 | "Fit the image width to the window width." | |
693 | (interactive) | |
694 | (let ((win-width (- (nth 2 (window-inside-pixel-edges)) | |
695 | (nth 0 (window-inside-pixel-edges)))) | |
696 | (slice (doc-view-current-slice))) | |
697 | (if (not slice) | |
698 | (let ((img-width (car (image-display-size | |
699 | (image-get-display-property) t)))) | |
700 | (doc-view-enlarge (/ (float win-width) (float img-width)))) | |
701 | ||
702 | ;; If slice is set | |
703 | (let* ((slice-width (nth 2 slice)) | |
704 | (scale-factor (/ (float win-width) (float slice-width))) | |
705 | (new-slice (mapcar (lambda (x) (ceiling (* scale-factor x))) slice))) | |
706 | ||
707 | (doc-view-enlarge scale-factor) | |
708 | (setf (doc-view-current-slice) new-slice) | |
709 | (doc-view-goto-page (doc-view-current-page)))))) | |
710 | ||
711 | (defun doc-view-fit-height-to-window () | |
712 | "Fit the image height to the window height." | |
713 | (interactive) | |
714 | (let ((win-height (- (nth 3 (window-inside-pixel-edges)) | |
715 | (nth 1 (window-inside-pixel-edges)))) | |
716 | (slice (doc-view-current-slice))) | |
717 | (if (not slice) | |
718 | (let ((img-height (cdr (image-display-size | |
719 | (image-get-display-property) t)))) | |
720 | ;; When users call 'doc-view-fit-height-to-window', | |
721 | ;; they might want to go to next page by typing SPC | |
722 | ;; ONLY once. So I used '(- win-height 1)' instead of | |
723 | ;; 'win-height' | |
724 | (doc-view-enlarge (/ (float (- win-height 1)) (float img-height)))) | |
725 | ||
726 | ;; If slice is set | |
727 | (let* ((slice-height (nth 3 slice)) | |
728 | (scale-factor (/ (float (- win-height 1)) (float slice-height))) | |
729 | (new-slice (mapcar (lambda (x) (ceiling (* scale-factor x))) slice))) | |
730 | ||
731 | (doc-view-enlarge scale-factor) | |
732 | (setf (doc-view-current-slice) new-slice) | |
733 | (doc-view-goto-page (doc-view-current-page)))))) | |
734 | ||
735 | (defun doc-view-fit-page-to-window () | |
736 | "Fit the image to the window. | |
737 | More specifically, this function enlarges image by: | |
738 | ||
739 | min {(window-width / image-width), (window-height / image-height)} times." | |
740 | (interactive) | |
741 | (let ((win-width (- (nth 2 (window-inside-pixel-edges)) | |
742 | (nth 0 (window-inside-pixel-edges)))) | |
743 | (win-height (- (nth 3 (window-inside-pixel-edges)) | |
744 | (nth 1 (window-inside-pixel-edges)))) | |
745 | (slice (doc-view-current-slice))) | |
746 | (if (not slice) | |
747 | (let ((img-width (car (image-display-size | |
748 | (image-get-display-property) t))) | |
749 | (img-height (cdr (image-display-size | |
750 | (image-get-display-property) t)))) | |
751 | (doc-view-enlarge (min (/ (float win-width) (float img-width)) | |
83600dc8 SM |
752 | (/ (float (- win-height 1)) |
753 | (float img-height))))) | |
d7b89879 TH |
754 | ;; If slice is set |
755 | (let* ((slice-width (nth 2 slice)) | |
756 | (slice-height (nth 3 slice)) | |
757 | (scale-factor (min (/ (float win-width) (float slice-width)) | |
83600dc8 SM |
758 | (/ (float (- win-height 1)) |
759 | (float slice-height)))) | |
d7b89879 TH |
760 | (new-slice (mapcar (lambda (x) (ceiling (* scale-factor x))) slice))) |
761 | (doc-view-enlarge scale-factor) | |
762 | (setf (doc-view-current-slice) new-slice) | |
763 | (doc-view-goto-page (doc-view-current-page)))))) | |
764 | ||
c17587fe | 765 | (defun doc-view-reconvert-doc () |
640602f7 RS |
766 | "Reconvert the current document. |
767 | Should be invoked when the cached images aren't up-to-date." | |
768 | (interactive) | |
f4c75497 SM |
769 | (doc-view-kill-proc) |
770 | ;; Clear the old cached files | |
771 | (when (file-exists-p (doc-view-current-cache-dir)) | |
bdd42899 | 772 | (delete-directory (doc-view-current-cache-dir) 'recursive)) |
83600dc8 | 773 | (kill-local-variable 'doc-view-last-page-number) |
c17587fe | 774 | (doc-view-initiate-display)) |
94dbe99c | 775 | |
b4cb319f SM |
776 | (defun doc-view-sentinel (proc event) |
777 | "Generic sentinel for doc-view conversion processes." | |
94dbe99c | 778 | (if (not (string-match "finished" event)) |
b4cb319f | 779 | (message "DocView: process %s changed status to %s." |
405ee48d CY |
780 | (process-name proc) |
781 | (if (string-match "\\(.+\\)\n?\\'" event) | |
782 | (match-string 1 event) | |
783 | event)) | |
ec4853ab SM |
784 | (when (buffer-live-p (process-get proc 'buffer)) |
785 | (with-current-buffer (process-get proc 'buffer) | |
786 | (setq doc-view-current-converter-processes | |
787 | (delq proc doc-view-current-converter-processes)) | |
788 | (setq mode-line-process | |
789 | (if doc-view-current-converter-processes | |
790 | (format ":%s" (car doc-view-current-converter-processes)))) | |
791 | (funcall (process-get proc 'callback)))))) | |
792 | ||
793 | (defun doc-view-start-process (name program args callback) | |
3c03f2ce TH |
794 | ;; Make sure the process is started in an existing directory, (rather than |
795 | ;; some file-name-handler-managed dir, for example). | |
796 | (let* ((default-directory (if (file-readable-p default-directory) | |
797 | default-directory | |
798 | (expand-file-name "~/"))) | |
ec4853ab SM |
799 | (proc (apply 'start-process name doc-view-conversion-buffer |
800 | program args))) | |
801 | (push proc doc-view-current-converter-processes) | |
802 | (setq mode-line-process (list (format ":%s" proc))) | |
803 | (set-process-sentinel proc 'doc-view-sentinel) | |
804 | (process-put proc 'buffer (current-buffer)) | |
805 | (process-put proc 'callback callback))) | |
b4cb319f SM |
806 | |
807 | (defun doc-view-dvi->pdf (dvi pdf callback) | |
808 | "Convert DVI to PDF asynchronously and call CALLBACK when finished." | |
53d4c024 TH |
809 | ;; Prefer dvipdf over dvipdfm, because the latter has problems if the DVI |
810 | ;; references and includes other PS files. | |
811 | (if (and doc-view-dvipdf-program | |
812 | (executable-find doc-view-dvipdf-program)) | |
813 | (doc-view-start-process "dvi->pdf" doc-view-dvipdf-program | |
94d11cb5 IK |
814 | (list dvi pdf) |
815 | callback) | |
53d4c024 TH |
816 | (doc-view-start-process "dvi->pdf" doc-view-dvipdfm-program |
817 | (list "-o" pdf dvi) | |
818 | callback))) | |
ec4853ab | 819 | |
95e16d17 TH |
820 | (defun doc-view-odf->pdf (odf callback) |
821 | "Convert ODF to PDF asynchronously and call CALLBACK when finished. | |
822 | The converted PDF is put into the current cache directory, and it | |
823 | is named like ODF with the extension turned to pdf." | |
824 | (doc-view-start-process "odf->pdf" doc-view-unoconv-program | |
825 | (list "-f" "pdf" "-o" (doc-view-current-cache-dir) odf) | |
826 | callback)) | |
94dbe99c TTN |
827 | |
828 | (defun doc-view-pdf/ps->png (pdf-ps png) | |
1f75e53d | 829 | "Convert PDF-PS to PNG asynchronously." |
ec4853ab SM |
830 | (doc-view-start-process |
831 | "pdf/ps->png" doc-view-ghostscript-program | |
832 | (append doc-view-ghostscript-options | |
833 | (list (format "-r%d" (round doc-view-resolution)) | |
834 | (concat "-sOutputFile=" png) | |
835 | pdf-ps)) | |
94d11cb5 | 836 | (let ((resolution doc-view-resolution)) |
bdd42899 SM |
837 | (lambda () |
838 | ;; Only create the resolution file when it's all done, so it also | |
839 | ;; serves as a witness that the conversion is complete. | |
840 | (write-region (prin1-to-string resolution) nil | |
841 | (expand-file-name "resolution.el" | |
842 | (doc-view-current-cache-dir)) | |
843 | nil 'silently) | |
844 | (when doc-view-current-timer | |
845 | (cancel-timer doc-view-current-timer) | |
846 | (setq doc-view-current-timer nil)) | |
847 | (doc-view-display (current-buffer) 'force)))) | |
ec4853ab | 848 | ;; Update the displayed pages as soon as they're done generating. |
94dbe99c TTN |
849 | (when doc-view-conversion-refresh-interval |
850 | (setq doc-view-current-timer | |
ec4853ab SM |
851 | (run-at-time "1 secs" doc-view-conversion-refresh-interval |
852 | 'doc-view-display | |
853 | (current-buffer))))) | |
854 | ||
855 | (defun doc-view-pdf->png-1 (pdf png page callback) | |
856 | "Convert a PAGE of a PDF file to PNG asynchronously. | |
857 | Call CALLBACK with no arguments when done." | |
858 | (doc-view-start-process | |
859 | "pdf->png-1" doc-view-ghostscript-program | |
860 | (append doc-view-ghostscript-options | |
861 | (list (format "-r%d" (round doc-view-resolution)) | |
862 | ;; Sadly, `gs' only supports the page-range | |
863 | ;; for PDF files. | |
864 | (format "-dFirstPage=%d" page) | |
865 | (format "-dLastPage=%d" page) | |
866 | (concat "-sOutputFile=" png) | |
867 | pdf)) | |
868 | callback)) | |
869 | ||
aa360da1 GM |
870 | (declare-function clear-image-cache "image.c" (&optional filter)) |
871 | ||
ec4853ab SM |
872 | (defun doc-view-pdf->png (pdf png pages) |
873 | "Convert a PDF file to PNG asynchronously. | |
874 | Start by converting PAGES, and then the rest." | |
875 | (if (null pages) | |
876 | (doc-view-pdf/ps->png pdf png) | |
877 | ;; We could render several `pages' with a single process if they're | |
878 | ;; (almost) consecutive, but since in 99% of the cases, there'll be only | |
879 | ;; a single page anyway, and of the remaining 1%, few cases will have | |
880 | ;; consecutive pages, it's not worth the trouble. | |
94d11cb5 | 881 | (let ((rest (cdr pages))) |
ec4853ab SM |
882 | (doc-view-pdf->png-1 |
883 | pdf (format png (car pages)) (car pages) | |
884 | (lambda () | |
885 | (if rest | |
886 | (doc-view-pdf->png pdf png rest) | |
887 | ;; Yippie, the important pages are done, update the display. | |
888 | (clear-image-cache) | |
bdd42899 SM |
889 | ;; For the windows that have a message (like "Welcome to |
890 | ;; DocView") display property, clearing the image cache is | |
891 | ;; not sufficient. | |
892 | (dolist (win (get-buffer-window-list (current-buffer) nil 'visible)) | |
893 | (with-selected-window win | |
94d11cb5 IK |
894 | (when (stringp (get-char-property (point-min) 'display)) |
895 | (doc-view-goto-page (doc-view-current-page))))) | |
ec4853ab SM |
896 | ;; Convert the rest of the pages. |
897 | (doc-view-pdf/ps->png pdf png))))))) | |
94dbe99c | 898 | |
b4cb319f SM |
899 | (defun doc-view-pdf->txt (pdf txt callback) |
900 | "Convert PDF to TXT asynchronously and call CALLBACK when finished." | |
d0af9f77 | 901 | (or (executable-find doc-view-pdftotext-program) |
ca32d854 | 902 | (error "You need the `pdftotext' program to convert a PDF to text")) |
ec4853ab SM |
903 | (doc-view-start-process "pdf->txt" doc-view-pdftotext-program |
904 | (list "-raw" pdf txt) | |
905 | callback)) | |
515357c2 | 906 | |
c00ebc98 TH |
907 | (defun doc-view-current-cache-doc-pdf () |
908 | "Return the name of the doc.pdf in the current cache dir. | |
909 | This file exists only if the current document isn't a PDF or PS file already." | |
910 | (expand-file-name "doc.pdf" (doc-view-current-cache-dir))) | |
911 | ||
b4cb319f SM |
912 | (defun doc-view-doc->txt (txt callback) |
913 | "Convert the current document to text and call CALLBACK when done." | |
7edd6b92 | 914 | (make-directory (doc-view-current-cache-dir) t) |
f58e0fd5 SM |
915 | (pcase doc-view-doc-type |
916 | ||
b4cb319f SM |
917 | ;; Doc is a PDF, so convert it to TXT |
918 | (doc-view-pdf->txt doc-view-buffer-file-name txt callback)) | |
f58e0fd5 | 919 | (`ps |
b4cb319f SM |
920 | ;; Doc is a PS, so convert it to PDF (which will be converted to |
921 | ;; TXT thereafter). | |
c00ebc98 | 922 | (let ((pdf (doc-view-current-cache-doc-pdf))) |
b4cb319f SM |
923 | (doc-view-ps->pdf doc-view-buffer-file-name pdf |
924 | (lambda () (doc-view-pdf->txt pdf txt callback))))) | |
f58e0fd5 | 925 | (`dvi |
b4cb319f SM |
926 | ;; Doc is a DVI. This means that a doc.pdf already exists in its |
927 | ;; cache subdirectory. | |
c00ebc98 | 928 | (doc-view-pdf->txt (doc-view-current-cache-doc-pdf) txt callback)) |
f58e0fd5 | 929 | (`odf |
b71b7803 TH |
930 | ;; Doc is some ODF (or MS Office) doc. This means that a doc.pdf |
931 | ;; already exists in its cache subdirectory. | |
c00ebc98 | 932 | (doc-view-pdf->txt (doc-view-current-cache-doc-pdf) txt callback)) |
f58e0fd5 | 933 | (_ (error "DocView doesn't know what to do")))) |
b4cb319f SM |
934 | |
935 | (defun doc-view-ps->pdf (ps pdf callback) | |
936 | "Convert PS to PDF asynchronously and call CALLBACK when finished." | |
d0af9f77 | 937 | (or (executable-find doc-view-ps2pdf-program) |
ca32d854 | 938 | (error "You need the `ps2pdf' program to convert PS to PDF")) |
ec4853ab SM |
939 | (doc-view-start-process "ps->pdf" doc-view-ps2pdf-program |
940 | (list | |
941 | ;; Avoid security problems when rendering files from | |
942 | ;; untrusted sources. | |
943 | "-dSAFER" | |
944 | ;; in-file and out-file | |
945 | ps pdf) | |
946 | callback)) | |
947 | ||
948 | (defun doc-view-active-pages () | |
949 | (let ((pages ())) | |
950 | (dolist (win (get-buffer-window-list (current-buffer) nil 'visible)) | |
951 | (let ((page (image-mode-window-get 'page win))) | |
952 | (unless (memq page pages) (push page pages)))) | |
953 | pages)) | |
94dbe99c | 954 | |
640602f7 | 955 | (defun doc-view-convert-current-doc () |
39a402e3 | 956 | "Convert `doc-view-buffer-file-name' to a set of png files, one file per page. |
640602f7 RS |
957 | Those files are saved in the directory given by the function |
958 | `doc-view-current-cache-dir'." | |
c17587fe SM |
959 | ;; Let stale files still display while we recompute the new ones, so only |
960 | ;; flush the cache when the conversion is over. One of the reasons why it | |
961 | ;; is important to keep displaying the stale page is so that revert-buffer | |
962 | ;; preserves the horizontal/vertical scroll settings (which are otherwise | |
963 | ;; resets during the redisplay). | |
964 | (setq doc-view-pending-cache-flush t) | |
965 | (let ((png-file (expand-file-name "page-%d.png" | |
966 | (doc-view-current-cache-dir)))) | |
7edd6b92 | 967 | (make-directory (doc-view-current-cache-dir) t) |
f58e0fd5 SM |
968 | (pcase doc-view-doc-type |
969 | (`dvi | |
eb79098b SM |
970 | ;; DVI files have to be converted to PDF before Ghostscript can process |
971 | ;; it. | |
c00ebc98 | 972 | (let ((pdf (doc-view-current-cache-doc-pdf))) |
b4cb319f SM |
973 | (doc-view-dvi->pdf doc-view-buffer-file-name pdf |
974 | (lambda () (doc-view-pdf/ps->png pdf png-file))))) | |
f58e0fd5 | 975 | (`odf |
95e16d17 TH |
976 | ;; ODF files have to be converted to PDF before Ghostscript can |
977 | ;; process it. | |
c00ebc98 | 978 | (let ((pdf (doc-view-current-cache-doc-pdf)) |
d2c32364 | 979 | (opdf (expand-file-name (concat (file-name-base doc-view-buffer-file-name) |
e95a67dc SM |
980 | ".pdf") |
981 | doc-view-current-cache-dir)) | |
982 | (png-file png-file)) | |
95e16d17 TH |
983 | ;; The unoconv tool only supports a output directory, but no |
984 | ;; file name. It's named like the input file with the | |
985 | ;; extension replaced by pdf. | |
986 | (doc-view-odf->pdf doc-view-buffer-file-name | |
987 | (lambda () | |
988 | ;; Rename to doc.pdf | |
989 | (rename-file opdf pdf) | |
990 | (doc-view-pdf/ps->png pdf png-file))))) | |
f58e0fd5 | 991 | |
bdd42899 SM |
992 | (let ((pages (doc-view-active-pages))) |
993 | ;; Convert PDF to PNG images starting with the active pages. | |
994 | (doc-view-pdf->png doc-view-buffer-file-name png-file pages))) | |
f58e0fd5 | 995 | (_ |
eb79098b SM |
996 | ;; Convert to PNG images. |
997 | (doc-view-pdf/ps->png doc-view-buffer-file-name png-file))))) | |
94dbe99c | 998 | |
94dbe99c TTN |
999 | ;;;; Slicing |
1000 | ||
aa360da1 GM |
1001 | (declare-function image-size "image.c" (spec &optional pixels frame)) |
1002 | ||
94dbe99c TTN |
1003 | (defun doc-view-set-slice (x y width height) |
1004 | "Set the slice of the images that should be displayed. | |
1005 | You can use this function to tell doc-view not to display the | |
1006 | margins of the document. It prompts for the top-left corner (X | |
1007 | and Y) of the slice to display and its WIDTH and HEIGHT. | |
1008 | ||
db8a5a18 TH |
1009 | See `doc-view-set-slice-using-mouse' and |
1010 | `doc-view-set-slice-from-bounding-box' for more convenient ways | |
1011 | to do that. To reset the slice use `doc-view-reset-slice'." | |
94dbe99c | 1012 | (interactive |
de171465 | 1013 | (let* ((size (image-size (doc-view-current-image) t)) |
1ca678aa MC |
1014 | (a (read-number (format "Top-left X (0..%d): " (car size)))) |
1015 | (b (read-number (format "Top-left Y (0..%d): " (cdr size)))) | |
1016 | (c (read-number (format "Width (0..%d): " (- (car size) a)))) | |
1017 | (d (read-number (format "Height (0..%d): " (- (cdr size) b))))) | |
94dbe99c | 1018 | (list a b c d))) |
de171465 | 1019 | (setf (doc-view-current-slice) (list x y width height)) |
94dbe99c | 1020 | ;; Redisplay |
de171465 | 1021 | (doc-view-goto-page (doc-view-current-page))) |
94dbe99c TTN |
1022 | |
1023 | (defun doc-view-set-slice-using-mouse () | |
1024 | "Set the slice of the images that should be displayed. | |
1025 | You set the slice by pressing mouse-1 at its top-left corner and | |
1026 | dragging it to its bottom-right corner. See also | |
1027 | `doc-view-set-slice' and `doc-view-reset-slice'." | |
1028 | (interactive) | |
1029 | (let (x y w h done) | |
1030 | (while (not done) | |
1031 | (let ((e (read-event | |
1ca678aa MC |
1032 | (concat "Press mouse-1 at the top-left corner and " |
1033 | "drag it to the bottom-right corner!")))) | |
1034 | (when (eq (car e) 'drag-mouse-1) | |
1035 | (setq x (car (posn-object-x-y (event-start e)))) | |
1036 | (setq y (cdr (posn-object-x-y (event-start e)))) | |
1037 | (setq w (- (car (posn-object-x-y (event-end e))) x)) | |
1038 | (setq h (- (cdr (posn-object-x-y (event-end e))) y)) | |
1039 | (setq done t)))) | |
94dbe99c TTN |
1040 | (doc-view-set-slice x y w h))) |
1041 | ||
db8a5a18 TH |
1042 | (defun doc-view-get-bounding-box () |
1043 | "Get the BoundingBox information of the current page." | |
1044 | (let* ((page (doc-view-current-page)) | |
c00ebc98 TH |
1045 | (doc (let ((cache-doc (doc-view-current-cache-doc-pdf))) |
1046 | (if (file-exists-p cache-doc) | |
1047 | cache-doc | |
1048 | doc-view-buffer-file-name))) | |
db8a5a18 TH |
1049 | (o (shell-command-to-string |
1050 | (concat doc-view-ghostscript-program | |
1051 | " -dSAFER -dBATCH -dNOPAUSE -q -sDEVICE=bbox " | |
1052 | (format "-dFirstPage=%s -dLastPage=%s %s" | |
c00ebc98 | 1053 | page page doc))))) |
db8a5a18 TH |
1054 | (save-match-data |
1055 | (when (string-match (concat "%%BoundingBox: " | |
1056 | "\\([[:digit:]]+\\) \\([[:digit:]]+\\) " | |
1057 | "\\([[:digit:]]+\\) \\([[:digit:]]+\\)") o) | |
1058 | (mapcar #'string-to-number | |
1059 | (list (match-string 1 o) | |
1060 | (match-string 2 o) | |
1061 | (match-string 3 o) | |
1062 | (match-string 4 o))))))) | |
1063 | ||
1064 | (defvar doc-view-paper-sizes | |
1065 | '((a4 595 842) | |
1066 | (a4-landscape 842 595) | |
1067 | (letter 612 792) | |
1068 | (letter-landscape 792 612) | |
1069 | (legal 612 1008) | |
1070 | (legal-landscape 1008 612) | |
1071 | (a3 842 1191) | |
1072 | (a3-landscape 1191 842) | |
1073 | (tabloid 792 1224) | |
1074 | (ledger 1224 792)) | |
1075 | "An alist from paper size names to dimensions.") | |
1076 | ||
1077 | (defun doc-view-guess-paper-size (iw ih) | |
1078 | "Guess the paper size according to the aspect ratio." | |
1079 | (cl-labels ((div (x y) | |
1080 | (round (/ (* 100.0 x) y)))) | |
1081 | (let ((ar (div iw ih)) | |
1082 | (al (mapcar (lambda (l) | |
46624b4f | 1083 | (list (div (nth 1 l) (nth 2 l)) (car l))) |
db8a5a18 TH |
1084 | doc-view-paper-sizes))) |
1085 | (cadr (assoc ar al))))) | |
1086 | ||
1087 | (defun doc-view-scale-bounding-box (ps iw ih bb) | |
46624b4f SM |
1088 | (list (/ (* (nth 0 bb) iw) (nth 1 (assoc ps doc-view-paper-sizes))) |
1089 | (/ (* (nth 1 bb) ih) (nth 2 (assoc ps doc-view-paper-sizes))) | |
1090 | (/ (* (nth 2 bb) iw) (nth 1 (assoc ps doc-view-paper-sizes))) | |
1091 | (/ (* (nth 3 bb) ih) (nth 2 (assoc ps doc-view-paper-sizes))))) | |
db8a5a18 TH |
1092 | |
1093 | (defun doc-view-set-slice-from-bounding-box (&optional force-paper-size) | |
1094 | "Set the slice from the document's BoundingBox information. | |
1095 | The result is that the margins are almost completely cropped, | |
1096 | much more accurate than could be done manually using | |
1097 | `doc-view-set-slice-using-mouse'." | |
1098 | (interactive "P") | |
1099 | (let ((bb (doc-view-get-bounding-box))) | |
1100 | (if (not bb) | |
1101 | (message "BoundingBox couldn't be determined") | |
1102 | (let* ((is (image-size (doc-view-current-image) t)) | |
1103 | (iw (car is)) | |
1104 | (ih (cdr is)) | |
1105 | (ps (or (and (null force-paper-size) (doc-view-guess-paper-size iw ih)) | |
1106 | (intern (completing-read "Paper size: " | |
1107 | (mapcar #'car doc-view-paper-sizes) | |
1108 | nil t)))) | |
1109 | (bb (doc-view-scale-bounding-box ps iw ih bb)) | |
1110 | (x1 (nth 0 bb)) | |
1111 | (y1 (nth 1 bb)) | |
1112 | (x2 (nth 2 bb)) | |
1113 | (y2 (nth 3 bb))) | |
1114 | ;; We keep a 2 pixel margin. | |
1115 | (doc-view-set-slice (- x1 2) (- ih y2 2) | |
1116 | (+ (- x2 x1) 4) (+ (- y2 y1) 4)))))) | |
1117 | ||
94dbe99c | 1118 | (defun doc-view-reset-slice () |
e48a5bf9 | 1119 | "Reset the current slice. |
1f75e53d | 1120 | After calling this function whole pages will be visible again." |
94dbe99c | 1121 | (interactive) |
de171465 | 1122 | (setf (doc-view-current-slice) nil) |
94dbe99c | 1123 | ;; Redisplay |
de171465 | 1124 | (doc-view-goto-page (doc-view-current-page))) |
94dbe99c TTN |
1125 | |
1126 | ;;;; Display | |
1127 | ||
1128 | (defun doc-view-insert-image (file &rest args) | |
1129 | "Insert the given png FILE. | |
e48a5bf9 | 1130 | ARGS is a list of image descriptors." |
c17587fe SM |
1131 | (when doc-view-pending-cache-flush |
1132 | (clear-image-cache) | |
1133 | (setq doc-view-pending-cache-flush nil)) | |
de171465 | 1134 | (let ((ol (doc-view-current-overlay)) |
56741510 | 1135 | (image (if (and file (file-readable-p file)) |
875c044a TH |
1136 | (if (not (fboundp 'imagemagick-types)) |
1137 | (apply 'create-image file 'png nil args) | |
1138 | (unless (member :width args) | |
1139 | (setq args (append args (list :width doc-view-image-width)))) | |
1140 | (apply 'create-image file 'imagemagick nil args)))) | |
de171465 SM |
1141 | (slice (doc-view-current-slice))) |
1142 | (setf (doc-view-current-image) image) | |
56741510 | 1143 | (move-overlay ol (point-min) (point-max)) |
de171465 | 1144 | (overlay-put ol 'display |
56741510 SM |
1145 | (cond |
1146 | (image | |
de171465 SM |
1147 | (if slice |
1148 | (list (cons 'slice slice) image) | |
56741510 SM |
1149 | image)) |
1150 | ;; We're trying to display a page that doesn't exist. | |
ec4853ab | 1151 | (doc-view-current-converter-processes |
56741510 SM |
1152 | ;; Maybe the page doesn't exist *yet*. |
1153 | "Cannot display this page (yet)!") | |
1154 | (t | |
1155 | ;; Typically happens if the conversion process somehow | |
1156 | ;; failed. Better not signal an error here because it | |
1157 | ;; could prevent a subsequent reconversion from fixing | |
1158 | ;; the problem. | |
1159 | (concat "Cannot display this page!\n" | |
1160 | "Maybe because of a conversion failure!")))) | |
1161 | (let ((win (overlay-get ol 'window))) | |
1162 | (if (stringp (overlay-get ol 'display)) | |
1163 | (progn ;Make sure the text is not scrolled out of view. | |
1164 | (set-window-hscroll win 0) | |
1165 | (set-window-vscroll win 0)) | |
1166 | (let ((hscroll (image-mode-window-get 'hscroll win)) | |
1167 | (vscroll (image-mode-window-get 'vscroll win))) | |
1168 | ;; Reset scroll settings, in case they were changed. | |
1169 | (if hscroll (set-window-hscroll win hscroll)) | |
1170 | (if vscroll (set-window-vscroll win vscroll))))))) | |
94dbe99c TTN |
1171 | |
1172 | (defun doc-view-sort (a b) | |
1173 | "Return non-nil if A should be sorted before B. | |
1174 | Predicate for sorting `doc-view-current-files'." | |
f4c75497 SM |
1175 | (or (< (length a) (length b)) |
1176 | (and (= (length a) (length b)) | |
1177 | (string< a b)))) | |
94dbe99c | 1178 | |
65073003 SM |
1179 | (defun doc-view-display (buffer &optional force) |
1180 | "Start viewing the document in BUFFER. | |
214abdd4 SM |
1181 | If FORCE is non-nil, start viewing even if the document does not |
1182 | have the page we want to view." | |
65073003 | 1183 | (with-current-buffer buffer |
83600dc8 | 1184 | (let ((prev-pages doc-view-current-files)) |
56741510 SM |
1185 | (setq doc-view-current-files |
1186 | (sort (directory-files (doc-view-current-cache-dir) t | |
1187 | "page-[0-9]+\\.png" t) | |
1188 | 'doc-view-sort)) | |
83600dc8 SM |
1189 | (dolist (win (or (get-buffer-window-list buffer nil t) |
1190 | (list t))) | |
10b6e7c1 CY |
1191 | (let* ((page (doc-view-current-page win)) |
1192 | (pagefile (expand-file-name (format "page-%d.png" page) | |
1193 | (doc-view-current-cache-dir)))) | |
1194 | (when (or force | |
1195 | (and (not (member pagefile prev-pages)) | |
1196 | (member pagefile doc-view-current-files))) | |
83600dc8 SM |
1197 | (if (windowp win) |
1198 | (with-selected-window win | |
1199 | (cl-assert (eq (current-buffer) buffer) t) | |
1200 | (doc-view-goto-page page)) | |
db8a5a18 | 1201 | (doc-view-goto-page page)))))))) |
94dbe99c TTN |
1202 | |
1203 | (defun doc-view-buffer-message () | |
c17587fe SM |
1204 | ;; Only show this message initially, not when refreshing the buffer (in which |
1205 | ;; case it's better to keep displaying the "stale" page while computing | |
1206 | ;; the fresh new ones). | |
de171465 SM |
1207 | (unless (overlay-get (doc-view-current-overlay) 'display) |
1208 | (overlay-put (doc-view-current-overlay) 'display | |
c17587fe SM |
1209 | (concat (propertize "Welcome to DocView!" 'face 'bold) |
1210 | "\n" | |
1211 | " | |
1f75e53d | 1212 | If you see this buffer it means that the document you want to view is being |
f4c75497 | 1213 | converted to PNG and the conversion of the first page hasn't finished yet or |
94dbe99c TTN |
1214 | `doc-view-conversion-refresh-interval' is set to nil. |
1215 | ||
1216 | For now these keys are useful: | |
1217 | ||
1ca678aa | 1218 | `q' : Bury this buffer. Conversion will go on in background. |
937cb3fb | 1219 | `k' : Kill the conversion process and this buffer. |
c17587fe | 1220 | `K' : Kill the conversion process.\n")))) |
94dbe99c | 1221 | |
aa360da1 GM |
1222 | (declare-function tooltip-show "tooltip" (text &optional use-echo-area)) |
1223 | ||
94dbe99c TTN |
1224 | (defun doc-view-show-tooltip () |
1225 | (interactive) | |
de171465 | 1226 | (tooltip-show (doc-view-current-info))) |
94dbe99c | 1227 | |
515357c2 TH |
1228 | (defun doc-view-open-text () |
1229 | "Open a buffer with the current doc's contents as text." | |
1230 | (interactive) | |
ec4853ab | 1231 | (if doc-view-current-converter-processes |
515357c2 TH |
1232 | (message "DocView: please wait till conversion finished.") |
1233 | (let ((txt (expand-file-name "doc.txt" (doc-view-current-cache-dir)))) | |
1234 | (if (file-readable-p txt) | |
5b355315 TH |
1235 | (let ((name (concat "Text contents of " |
1236 | (file-name-nondirectory buffer-file-name))) | |
1237 | (dir (file-name-directory buffer-file-name))) | |
1238 | (with-current-buffer (find-file txt) | |
1239 | (rename-buffer name) | |
1240 | (setq default-directory dir))) | |
b4cb319f | 1241 | (doc-view-doc->txt txt 'doc-view-open-text))))) |
515357c2 | 1242 | |
937cb3fb | 1243 | ;;;;; Toggle between editing and viewing |
640602f7 | 1244 | |
83600dc8 SM |
1245 | (defvar-local doc-view-saved-settings nil |
1246 | "Doc-view settings saved while in some other mode.") | |
1247 | (put 'doc-view-saved-settings 'permanent-local t) | |
1248 | ||
640602f7 | 1249 | (defun doc-view-toggle-display () |
937cb3fb | 1250 | "Toggle between editing a document as text or viewing it." |
640602f7 | 1251 | (interactive) |
937cb3fb GM |
1252 | (if (eq major-mode 'doc-view-mode) |
1253 | ;; Switch to editing mode | |
1254 | (progn | |
1255 | (doc-view-kill-proc) | |
1256 | (setq buffer-read-only nil) | |
515357c2 TH |
1257 | (remove-overlays (point-min) (point-max) 'doc-view t) |
1258 | (set (make-local-variable 'image-mode-winprops-alist) t) | |
ad727c81 TH |
1259 | ;; Switch to the previously used major mode or fall back to |
1260 | ;; normal mode. | |
291cc045 | 1261 | (doc-view-fallback-mode) |
c17587fe | 1262 | (doc-view-minor-mode 1)) |
937cb3fb GM |
1263 | ;; Switch to doc-view-mode |
1264 | (when (and (buffer-modified-p) | |
1265 | (y-or-n-p "The buffer has been modified. Save the changes? ")) | |
1266 | (save-buffer)) | |
937cb3fb | 1267 | (doc-view-mode))) |
640602f7 | 1268 | |
94dbe99c TTN |
1269 | ;;;; Searching |
1270 | ||
515357c2 | 1271 | |
94dbe99c TTN |
1272 | (defun doc-view-search-internal (regexp file) |
1273 | "Return a list of FILE's pages that contain text matching REGEXP. | |
1ca678aa MC |
1274 | The value is an alist of the form (PAGE CONTEXTS) where PAGE is |
1275 | the pagenumber and CONTEXTS are all lines of text containing a match." | |
94dbe99c TTN |
1276 | (with-temp-buffer |
1277 | (insert-file-contents file) | |
1278 | (let ((page 1) | |
1ca678aa MC |
1279 | (lastpage 1) |
1280 | matches) | |
94dbe99c | 1281 | (while (re-search-forward (concat "\\(?:\\([\f]\\)\\|\\(" |
1ca678aa | 1282 | regexp "\\)\\)") nil t) |
069b4ce3 | 1283 | (when (match-string 1) (setq page (1+ page))) |
1ca678aa MC |
1284 | (when (match-string 2) |
1285 | (if (/= page lastpage) | |
c17587fe | 1286 | (push (cons page |
515357c2 TH |
1287 | (list (buffer-substring |
1288 | (line-beginning-position) | |
1289 | (line-end-position)))) | |
1290 | matches) | |
1ca678aa MC |
1291 | (setq matches (cons |
1292 | (append | |
1293 | (or | |
1294 | ;; This page already is a match. | |
1295 | (car matches) | |
1296 | ;; This is the first match on page. | |
1297 | (list page)) | |
1298 | (list (buffer-substring | |
1299 | (line-beginning-position) | |
1300 | (line-end-position)))) | |
1301 | (cdr matches)))) | |
1302 | (setq lastpage page))) | |
94dbe99c TTN |
1303 | (nreverse matches)))) |
1304 | ||
1305 | (defun doc-view-search-no-of-matches (list) | |
1306 | "Extract the number of matches from the search result LIST." | |
1307 | (let ((no 0)) | |
1308 | (dolist (p list) | |
1309 | (setq no (+ no (1- (length p))))) | |
1310 | no)) | |
1311 | ||
7baca0fa JL |
1312 | (defun doc-view-search-backward (new-query) |
1313 | "Call `doc-view-search' for backward search. | |
1314 | If prefix NEW-QUERY is given, ask for a new regexp." | |
1315 | (interactive "P") | |
da99b369 | 1316 | (doc-view-search new-query t)) |
7baca0fa JL |
1317 | |
1318 | (defun doc-view-search (new-query &optional backward) | |
1319 | "Jump to the next match or initiate a new search if NEW-QUERY is given. | |
94dbe99c | 1320 | If the current document hasn't been transformed to plain text |
7baca0fa JL |
1321 | till now do that first. |
1322 | If BACKWARD is non-nil, jump to the previous match." | |
1323 | (interactive "P") | |
da99b369 | 1324 | (if (and (not new-query) |
7baca0fa JL |
1325 | doc-view-current-search-matches) |
1326 | (if backward | |
1327 | (doc-view-search-previous-match 1) | |
1328 | (doc-view-search-next-match 1)) | |
1329 | ;; New search, so forget the old results. | |
1330 | (setq doc-view-current-search-matches nil) | |
1331 | (let ((txt (expand-file-name "doc.txt" | |
1332 | (doc-view-current-cache-dir)))) | |
1333 | (if (file-readable-p txt) | |
1334 | (progn | |
1335 | (setq doc-view-current-search-matches | |
1336 | (doc-view-search-internal | |
1337 | (read-from-minibuffer "Regexp: ") | |
1338 | txt)) | |
1339 | (message "DocView: search yielded %d matches." | |
1340 | (doc-view-search-no-of-matches | |
1341 | doc-view-current-search-matches))) | |
1342 | ;; We must convert to TXT first! | |
ec4853ab | 1343 | (if doc-view-current-converter-processes |
7baca0fa | 1344 | (message "DocView: please wait till conversion finished.") |
b4cb319f | 1345 | (doc-view-doc->txt txt (lambda () (doc-view-search nil)))))))) |
94dbe99c TTN |
1346 | |
1347 | (defun doc-view-search-next-match (arg) | |
1348 | "Go to the ARGth next matching page." | |
1349 | (interactive "p") | |
937cb3fb | 1350 | (let* ((next-pages (doc-view-remove-if |
de171465 | 1351 | (lambda (i) (<= (car i) (doc-view-current-page))) |
937cb3fb | 1352 | doc-view-current-search-matches)) |
1ca678aa | 1353 | (page (car (nth (1- arg) next-pages)))) |
94dbe99c | 1354 | (if page |
1ca678aa | 1355 | (doc-view-goto-page page) |
94dbe99c | 1356 | (when (and |
1ca678aa MC |
1357 | doc-view-current-search-matches |
1358 | (y-or-n-p "No more matches after current page. Wrap to first match? ")) | |
1359 | (doc-view-goto-page (caar doc-view-current-search-matches)))))) | |
94dbe99c TTN |
1360 | |
1361 | (defun doc-view-search-previous-match (arg) | |
1362 | "Go to the ARGth previous matching page." | |
1363 | (interactive "p") | |
937cb3fb | 1364 | (let* ((prev-pages (doc-view-remove-if |
de171465 | 1365 | (lambda (i) (>= (car i) (doc-view-current-page))) |
937cb3fb | 1366 | doc-view-current-search-matches)) |
1ca678aa | 1367 | (page (car (nth (1- arg) (nreverse prev-pages))))) |
94dbe99c | 1368 | (if page |
1ca678aa | 1369 | (doc-view-goto-page page) |
94dbe99c | 1370 | (when (and |
1ca678aa MC |
1371 | doc-view-current-search-matches |
1372 | (y-or-n-p "No more matches before current page. Wrap to last match? ")) | |
1373 | (doc-view-goto-page (caar (last doc-view-current-search-matches))))))) | |
94dbe99c | 1374 | |
640602f7 | 1375 | ;;;; User interface commands and the mode |
94dbe99c | 1376 | |
0d17c4b9 | 1377 | (put 'doc-view-mode 'mode-class 'special) |
c17587fe | 1378 | |
515357c2 TH |
1379 | (defun doc-view-already-converted-p () |
1380 | "Return non-nil if the current doc was already converted." | |
1381 | (and (file-exists-p (doc-view-current-cache-dir)) | |
bdd42899 SM |
1382 | ;; Check that the resolution info is there, otherwise it means |
1383 | ;; the conversion is incomplete. | |
1384 | (file-readable-p (expand-file-name "resolution.el" | |
1385 | (doc-view-current-cache-dir))) | |
1386 | (> (length (directory-files (doc-view-current-cache-dir) | |
1387 | nil "\\.png\\'")) | |
1388 | 0))) | |
515357c2 | 1389 | |
c17587fe SM |
1390 | (defun doc-view-initiate-display () |
1391 | ;; Switch to image display if possible | |
322f4559 | 1392 | (if (doc-view-mode-p doc-view-doc-type) |
c17587fe SM |
1393 | (progn |
1394 | (doc-view-buffer-message) | |
de171465 | 1395 | (setf (doc-view-current-page) (or (doc-view-current-page) 1)) |
515357c2 | 1396 | (if (doc-view-already-converted-p) |
c17587fe SM |
1397 | (progn |
1398 | (message "DocView: using cached files!") | |
cde4c3f1 | 1399 | ;; Load the saved resolution |
bdd42899 SM |
1400 | (let* ((res-file (expand-file-name "resolution.el" |
1401 | (doc-view-current-cache-dir))) | |
1402 | (res | |
1403 | (with-temp-buffer | |
1404 | (when (file-readable-p res-file) | |
1405 | (insert-file-contents res-file) | |
1406 | (read (current-buffer)))))) | |
1407 | (when (numberp res) | |
cde4c3f1 | 1408 | (set (make-local-variable 'doc-view-resolution) res))) |
65073003 | 1409 | (doc-view-display (current-buffer) 'force)) |
c17587fe SM |
1410 | (doc-view-convert-current-doc)) |
1411 | (message | |
1412 | "%s" | |
1413 | (substitute-command-keys | |
1414 | (concat "Type \\[doc-view-toggle-display] to toggle between " | |
1415 | "editing or viewing the document.")))) | |
1416 | (message | |
1417 | "%s" | |
0855c2ca CY |
1418 | (concat "No PNG support is available, or some conversion utility for " |
1419 | (file-name-extension doc-view-buffer-file-name) | |
1420 | " files is missing.")) | |
1281bd51 TH |
1421 | (when (and (executable-find doc-view-pdftotext-program) |
1422 | (y-or-n-p | |
1423 | "Unable to render file. View extracted text instead? ")) | |
1424 | (doc-view-open-text)) | |
1425 | (doc-view-toggle-display))) | |
94dbe99c | 1426 | |
e0385bf4 | 1427 | (defvar bookmark-make-record-function) |
069b4ce3 | 1428 | |
65073003 SM |
1429 | (defun doc-view-clone-buffer-hook () |
1430 | ;; FIXME: There are several potential problems linked with reconversion | |
1431 | ;; and auto-revert when we have indirect buffers because they share their | |
1432 | ;; /tmp cache directory. This sharing is good (you'd rather not reconvert | |
1433 | ;; for each clone), but that means that clones need to collaborate a bit. | |
1434 | ;; I guess it mostly means: detect when a reconversion process is already | |
1435 | ;; running, and run the sentinel in all clones. | |
515357c2 | 1436 | ;; |
de171465 | 1437 | ;; Maybe the clones should really have a separate /tmp directory |
65073003 SM |
1438 | ;; so they could have a different resolution and you could use clones |
1439 | ;; for zooming. | |
de171465 SM |
1440 | (remove-overlays (point-min) (point-max) 'doc-view t) |
1441 | (if (consp image-mode-winprops-alist) (setq image-mode-winprops-alist nil))) | |
65073003 | 1442 | |
eb79098b SM |
1443 | (defun doc-view-intersection (l1 l2) |
1444 | (let ((l ())) | |
1445 | (dolist (x l1) (if (memq x l2) (push x l))) | |
1446 | l)) | |
1447 | ||
291cc045 TH |
1448 | (defun doc-view-set-doc-type () |
1449 | "Figure out the current document type (`doc-view-doc-type')." | |
1450 | (let ((name-types | |
1451 | (when buffer-file-name | |
1452 | (cdr (assoc (file-name-extension buffer-file-name) | |
1453 | '( | |
1454 | ;; DVI | |
1455 | ("dvi" dvi) | |
1456 | ||
1457 | ("pdf" pdf) ("epdf" pdf) | |
1458 | ;; PostScript | |
1459 | ("ps" ps) ("eps" ps) | |
1460 | ;; OpenDocument formats | |
1461 | ("odt" odf) ("ods" odf) ("odp" odf) ("odg" odf) | |
1462 | ("odc" odf) ("odi" odf) ("odm" odf) ("ott" odf) | |
1463 | ("ots" odf) ("otp" odf) ("otg" odf) | |
1464 | ;; Microsoft Office formats (also handled | |
1465 | ;; by the odf conversion chain) | |
1466 | ("doc" odf) ("docx" odf) ("xls" odf) ("xlsx" odf) | |
1467 | ("ppt" odf) ("pptx" odf)))))) | |
1468 | (content-types | |
1469 | (save-excursion | |
1470 | (goto-char (point-min)) | |
1471 | (cond | |
1472 | ((looking-at "%!") '(ps)) | |
1473 | ((looking-at "%PDF") '(pdf)) | |
1474 | ((looking-at "\367\002") '(dvi)))))) | |
1475 | (set (make-local-variable 'doc-view-doc-type) | |
1476 | (car (or (doc-view-intersection name-types content-types) | |
1477 | (when (and name-types content-types) | |
1478 | (error "Conflicting types: name says %s but content says %s" | |
1479 | name-types content-types)) | |
1480 | name-types content-types | |
1481 | (error "Cannot determine the document type")))))) | |
1482 | ||
640602f7 | 1483 | ;;;###autoload |
937cb3fb | 1484 | (defun doc-view-mode () |
640602f7 | 1485 | "Major mode in DocView buffers. |
06a21f70 TH |
1486 | |
1487 | DocView Mode is an Emacs document viewer. It displays PDF, PS | |
1488 | and DVI files (as PNG images) in Emacs buffers. | |
1489 | ||
640602f7 | 1490 | You can use \\<doc-view-mode-map>\\[doc-view-toggle-display] to |
5c1f16b0 SM |
1491 | toggle between displaying the document or editing it as text. |
1492 | \\{doc-view-mode-map}" | |
937cb3fb | 1493 | (interactive) |
f9adf05b | 1494 | |
96fe38a8 | 1495 | (if (= (point-min) (point-max)) |
85699772 | 1496 | ;; The doc is empty or doesn't exist at all, so fallback to |
96fe38a8 SM |
1497 | ;; another mode. We used to also check file-exists-p, but this |
1498 | ;; returns nil for tar members. | |
291cc045 | 1499 | (doc-view-fallback-mode) |
06a21f70 | 1500 | |
83600dc8 | 1501 | (let* ((prev-major-mode (if (derived-mode-p 'doc-view-mode) |
06a21f70 | 1502 | doc-view-previous-major-mode |
83600dc8 | 1503 | (unless (eq major-mode 'fundamental-mode) |
ad727c81 | 1504 | major-mode)))) |
06a21f70 | 1505 | (kill-all-local-variables) |
83600dc8 SM |
1506 | (set (make-local-variable 'doc-view-previous-major-mode) |
1507 | prev-major-mode)) | |
1508 | ||
1509 | (dolist (var doc-view-saved-settings) | |
1510 | (set (make-local-variable (car var)) (cdr var))) | |
bc19637d | 1511 | |
06a21f70 | 1512 | ;; Figure out the document type. |
291cc045 TH |
1513 | (unless doc-view-doc-type |
1514 | (doc-view-set-doc-type)) | |
bc19637d | 1515 | |
06a21f70 TH |
1516 | (doc-view-make-safe-dir doc-view-cache-directory) |
1517 | ;; Handle compressed files, remote files, files inside archives | |
1518 | (set (make-local-variable 'doc-view-buffer-file-name) | |
1519 | (cond | |
1520 | (jka-compr-really-do-compress | |
5e9fde5e | 1521 | ;; FIXME: there's a risk of name conflicts here. |
06a21f70 TH |
1522 | (expand-file-name |
1523 | (file-name-nondirectory | |
1524 | (file-name-sans-extension buffer-file-name)) | |
1525 | doc-view-cache-directory)) | |
1526 | ;; Is the file readable by local processes? | |
1527 | ;; We used to use `file-remote-p' but it's unclear what it's | |
1528 | ;; supposed to return nil for things like local files accessed via | |
1529 | ;; `su' or via file://... | |
1530 | ((let ((file-name-handler-alist nil)) | |
5e9fde5e SM |
1531 | (not (and buffer-file-name (file-readable-p buffer-file-name)))) |
1532 | ;; FIXME: there's a risk of name conflicts here. | |
06a21f70 | 1533 | (expand-file-name |
5e9fde5e SM |
1534 | (if buffer-file-name |
1535 | (file-name-nondirectory buffer-file-name) | |
1536 | (buffer-name)) | |
1537 | doc-view-cache-directory)) | |
06a21f70 TH |
1538 | (t buffer-file-name))) |
1539 | (when (not (string= doc-view-buffer-file-name buffer-file-name)) | |
1540 | (write-region nil nil doc-view-buffer-file-name)) | |
bc19637d | 1541 | |
06a21f70 TH |
1542 | (add-hook 'change-major-mode-hook |
1543 | (lambda () | |
1544 | (doc-view-kill-proc) | |
1545 | (remove-overlays (point-min) (point-max) 'doc-view t)) | |
1546 | nil t) | |
1547 | (add-hook 'clone-indirect-buffer-hook 'doc-view-clone-buffer-hook nil t) | |
1548 | (add-hook 'kill-buffer-hook 'doc-view-kill-proc nil t) | |
bc19637d | 1549 | |
06a21f70 TH |
1550 | (remove-overlays (point-min) (point-max) 'doc-view t) ;Just in case. |
1551 | ;; Keep track of display info ([vh]scroll, page number, overlay, | |
1552 | ;; ...) for each window in which this document is shown. | |
1553 | (add-hook 'image-mode-new-window-functions | |
1554 | 'doc-view-new-window-function nil t) | |
1555 | (image-mode-setup-winprops) | |
bc19637d | 1556 | |
06a21f70 TH |
1557 | (set (make-local-variable 'mode-line-position) |
1558 | '(" P" (:eval (number-to-string (doc-view-current-page))) | |
bdd42899 | 1559 | "/" (:eval (number-to-string (doc-view-last-page-number))))) |
06a21f70 TH |
1560 | ;; Don't scroll unless the user specifically asked for it. |
1561 | (set (make-local-variable 'auto-hscroll-mode) nil) | |
7d6b4d3c JL |
1562 | (set (make-local-variable 'mwheel-scroll-up-function) |
1563 | 'doc-view-scroll-up-or-next-page) | |
1564 | (set (make-local-variable 'mwheel-scroll-down-function) | |
1565 | 'doc-view-scroll-down-or-previous-page) | |
06a21f70 TH |
1566 | (set (make-local-variable 'cursor-type) nil) |
1567 | (use-local-map doc-view-mode-map) | |
1568 | (set (make-local-variable 'after-revert-hook) 'doc-view-reconvert-doc) | |
1569 | (set (make-local-variable 'bookmark-make-record-function) | |
1570 | 'doc-view-bookmark-make-record) | |
1571 | (setq mode-name "DocView" | |
1572 | buffer-read-only t | |
1573 | major-mode 'doc-view-mode) | |
1574 | (doc-view-initiate-display) | |
d1d33062 TH |
1575 | ;; Switch off view-mode explicitly, because doc-view-mode is the |
1576 | ;; canonical view mode for PDF/PS/DVI files. This could be | |
1577 | ;; switched on automatically depending on the value of | |
1578 | ;; `view-read-only'. | |
bde04ea9 | 1579 | (set (make-local-variable 'view-read-only) nil) |
06a21f70 | 1580 | (run-mode-hooks 'doc-view-mode-hook))) |
937cb3fb | 1581 | |
291cc045 TH |
1582 | (defun doc-view-fallback-mode () |
1583 | "Fallback to the previous or next best major mode." | |
83600dc8 SM |
1584 | (let ((vars (if (derived-mode-p 'doc-view-mode) |
1585 | (mapcar (lambda (var) (cons var (symbol-value var))) | |
1586 | '(doc-view-resolution | |
1587 | image-mode-winprops-alist))))) | |
1588 | (if doc-view-previous-major-mode | |
1589 | (funcall doc-view-previous-major-mode) | |
1590 | (let ((auto-mode-alist | |
1591 | (rassq-delete-all | |
1592 | 'doc-view-mode-maybe | |
1593 | (rassq-delete-all 'doc-view-mode | |
1594 | (copy-alist auto-mode-alist))))) | |
1595 | (normal-mode))) | |
1596 | (when vars | |
1597 | (setq-local doc-view-saved-settings vars)))) | |
291cc045 TH |
1598 | |
1599 | ;;;###autoload | |
1600 | (defun doc-view-mode-maybe () | |
1601 | "Switch to `doc-view-mode' if possible. | |
1602 | If the required external tools are not available, then fallback | |
1603 | to the next best mode." | |
1604 | (condition-case nil | |
1605 | (doc-view-set-doc-type) | |
1606 | (error (doc-view-fallback-mode))) | |
1607 | (if (doc-view-mode-p doc-view-doc-type) | |
1608 | (doc-view-mode) | |
1609 | (doc-view-fallback-mode))) | |
1610 | ||
937cb3fb GM |
1611 | ;;;###autoload |
1612 | (define-minor-mode doc-view-minor-mode | |
06e21633 CY |
1613 | "Toggle displaying buffer via Doc View (Doc View minor mode). |
1614 | With a prefix argument ARG, enable Doc View minor mode if ARG is | |
1615 | positive, and disable it otherwise. If called from Lisp, enable | |
1616 | the mode if ARG is omitted or nil. | |
1617 | ||
937cb3fb GM |
1618 | See the command `doc-view-mode' for more information on this mode." |
1619 | nil " DocView" doc-view-minor-mode-map | |
1620 | :group 'doc-view | |
1621 | (when doc-view-minor-mode | |
1622 | (add-hook 'change-major-mode-hook (lambda () (doc-view-minor-mode -1)) nil t) | |
1623 | (message | |
1624 | "%s" | |
1625 | (substitute-command-keys | |
1626 | "Type \\[doc-view-toggle-display] to toggle between editing or viewing the document.")))) | |
94dbe99c TTN |
1627 | |
1628 | (defun doc-view-clear-cache () | |
1629 | "Delete the whole cache (`doc-view-cache-directory')." | |
1630 | (interactive) | |
515357c2 | 1631 | (dired-delete-file doc-view-cache-directory 'always)) |
94dbe99c TTN |
1632 | |
1633 | (defun doc-view-dired-cache () | |
1634 | "Open `dired' in `doc-view-cache-directory'." | |
1635 | (interactive) | |
1636 | (dired doc-view-cache-directory)) | |
1637 | ||
94dbe99c | 1638 | |
1666a6b3 TH |
1639 | ;;;; Bookmark integration |
1640 | ||
e44fa724 KF |
1641 | (declare-function bookmark-make-record-default |
1642 | "bookmark" (&optional no-file no-context posn)) | |
a9f8b49b | 1643 | (declare-function bookmark-prop-get "bookmark" (bookmark prop)) |
43f8b275 | 1644 | (declare-function bookmark-default-handler "bookmark" (bmk)) |
a9f8b49b | 1645 | |
32a091dd | 1646 | (defun doc-view-bookmark-make-record () |
43f8b275 SM |
1647 | (nconc (bookmark-make-record-default) |
1648 | `((page . ,(doc-view-current-page)) | |
1649 | (handler . doc-view-bookmark-jump)))) | |
1666a6b3 | 1650 | |
069b4ce3 | 1651 | |
1666a6b3 TH |
1652 | ;;;###autoload |
1653 | (defun doc-view-bookmark-jump (bmk) | |
03e26a79 | 1654 | ;; This implements the `handler' function interface for record type |
e0385bf4 | 1655 | ;; returned by `doc-view-bookmark-make-record', which see. |
43f8b275 SM |
1656 | (prog1 (bookmark-default-handler bmk) |
1657 | (let ((page (bookmark-prop-get bmk 'page))) | |
1666a6b3 | 1658 | (when (not (eq major-mode 'doc-view-mode)) |
43f8b275 | 1659 | (doc-view-toggle-display)) |
a9f8b49b | 1660 | (with-selected-window |
94d11cb5 IK |
1661 | (or (get-buffer-window (current-buffer) 0) |
1662 | (selected-window)) | |
1663 | (doc-view-goto-page page))))) | |
1666a6b3 | 1664 | |
069b4ce3 GM |
1665 | |
1666 | (provide 'doc-view) | |
1667 | ||
1668 | ;; Local Variables: | |
f0da764a | 1669 | ;; eval: (outline-minor-mode 1) |
069b4ce3 GM |
1670 | ;; End: |
1671 | ||
94dbe99c | 1672 | ;;; doc-view.el ends here |