;;; doc-view.el --- View PDF/PostScript/DVI files in Emacs
-;; Copyright (C) 2007 Free Software Foundation, Inc.
+;; Copyright (C) 2007, 2008 Free Software Foundation, Inc.
;;
;; Author: Tassilo Horn <tassilo@member.fsf.org>
;; Maintainer: Tassilo Horn <tassilo@member.fsf.org>
;; This file is part of GNU Emacs.
-;; GNU Emacs is free software; you can redistribute it and/or modify
+;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation; either version 3, or (at your option)
-;; any later version.
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING. If not, write to the
-;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-;; Boston, MA 02110-1301, USA.
+;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Requirements:
;; doc-view.el requires GNU Emacs 22.1 or newer. You also need Ghostscript,
-;; `dvipdfm' which comes with teTeX and `pdftotext', which comes with xpdf
-;; (http://www.foolabs.com/xpdf/) or poppler (http://poppler.freedesktop.org/).
+;; `dvipdf' (comes with Ghostscript) or `dvipdfm' (comes with teTeX or TeXLive)
+;; and `pdftotext', which comes with xpdf (http://www.foolabs.com/xpdf/) or
+;; poppler (http://poppler.freedesktop.org/).
;;; Commentary:
;;
;; and the document will be converted and displayed, if your emacs supports png
;; images. With `C-c C-c' you can toggle between the rendered images
-;; representation and the source text representation of the document. With
-;; `C-c C-e' you can switch to an appropriate editing mode for the document.
+;; representation and the source text representation of the document.
;;
;; Since conversion may take some time all the PNG images are cached in a
;; subdirectory of `doc-view-cache-directory' and reused when you want to view
;; You can also search within the document. The command `doc-view-search'
;; (bound to `C-s') queries for a search regexp and initializes a list of all
;; matching pages and messages how many match-pages were found. After that you
-;; can jump to the next page containing a match with
-;; `doc-view-search-next-match' (bound to `C-S-n') or to the previous matching
-;; page with `doc-view-search-previous-match' (bound to `C-S-p'). This works
-;; by searching a plain text representation of the document. If that doesn't
-;; already exist the first invokation of `doc-view-search' starts the
-;; conversion. When that finishes and you're still viewing the document
-;; (i.e. you didn't switch to another buffer) you're queried for the regexp
-;; then.
+;; can jump to the next page containing a match with an additional `C-s'. With
+;; `C-r' you can do the same, but backwards. To search for a new regexp give a
+;; prefix arg to one of the search functions, e.g. by typing `C-u C-s'. The
+;; searching works by using a plain text representation of the document. If
+;; that doesn't already exist the first invokation of `doc-view-search' (or
+;; `doc-view-search-backward') starts the conversion. When that finishes and
+;; you're still viewing the document (i.e. you didn't switch to another buffer)
+;; you're queried for the regexp then.
;;
;; Dired users can simply hit `v' on a document file. If it's a PS, PDF or DVI
;; it will be opened using `doc-view-mode'.
;;
;; and modify them to your needs.
+;;; Todo:
+
+;; - add print command.
+;; - share more code with image-mode.
+;; - better menu.
+;; - Bind slicing to a drag event.
+;; - doc-view-fit-doc-to-window and doc-view-fit-window-to-doc?
+;; - zoom the region around the cursor (like xdvi).
+;; - get rid of the silly arrow in the fringe.
+;; - improve anti-aliasing (pdf-utils gets it better).
+
+;;;; About isearch support
+
+;; I tried implementing isearch by setting
+;; `isearch-search-fun-function' buffer-locally, but that didn't
+;; work too good. The function doing the real search was called
+;; endlessly somehow. But even if we'd get that working no real
+;; isearch feeling comes up due to the missing match highlighting.
+;; Currently I display all lines containing a match in a tooltip and
+;; each C-s or C-r jumps directly to the next/previous page with a
+;; match. With isearch we could only display the current match. So
+;; we had to decide if another C-s jumps to the next page with a
+;; match (thus only the first match in a page will be displayed in a
+;; tooltip) or to the next match, which would do nothing visible
+;; (except the tooltip) if the next match is on the same page.
+
+;; And it's much slower than the current search facility, because
+;; isearch really searches for each step forward or backward wheras
+;; the current approach searches once and then it knows to which
+;; pages to jump.
+
+;; Anyway, if someone with better isearch knowledge wants to give it a try,
+;; feel free to do it. --Tassilo
+
;;; Code:
+(eval-when-compile (require 'cl))
(require 'dired)
(require 'image-mode)
-(eval-when-compile (require 'cl))
+(require 'jka-compr)
;;;; Customization Options
'("-dSAFER" ;; Avoid security problems when rendering files from untrusted
;; sources.
"-dNOPAUSE" "-sDEVICE=png16m" "-dTextAlphaBits=4"
- "-dBATCH" "-dGraphicsAlphaBits=4" "-dQUIET" "-r100")
+ "-dBATCH" "-dGraphicsAlphaBits=4" "-dQUIET")
"A list of options to give to ghostscript."
:type '(repeat string)
:group 'doc-view)
+(defcustom doc-view-resolution 100
+ "Dots per inch resolution used to render the documents.
+Higher values result in larger images."
+ :type 'number
+ :group 'doc-view)
+
(defcustom doc-view-dvipdfm-program (executable-find "dvipdfm")
"Program to convert DVI files to PDF.
DVI file will be converted to PDF before the resulting PDF is
-converted to PNG."
+converted to PNG.
+
+If this and `doc-view-dvipdf-program' are set,
+`doc-view-dvipdf-program' will be preferred."
+ :type 'file
+ :group 'doc-view)
+
+(defcustom doc-view-dvipdf-program (executable-find "dvipdf")
+ "Program to convert DVI files to PDF.
+
+DVI file will be converted to PDF before the resulting PDF is
+converted to PNG.
+
+If this and `doc-view-dvipdfm-program' are set,
+`doc-view-dvipdf-program' will be preferred."
:type 'file
:group 'doc-view)
:type 'file
:group 'doc-view)
-(defcustom doc-view-cache-directory (concat temporary-file-directory
- "doc-view")
+(defcustom doc-view-cache-directory
+ (expand-file-name (format "docview%d" (user-uid))
+ temporary-file-directory)
"The base directory, where the PNG images will be saved."
:type 'directory
:group 'doc-view)
-(defcustom doc-view-conversion-buffer "*doc-view conversion output*"
- "The buffer where messages from the converter programs go to."
- :type 'string
- :group 'doc-view)
+(defvar doc-view-conversion-buffer " *doc-view conversion output*"
+ "The buffer where messages from the converter programs go to.")
-(defcustom doc-view-conversion-refresh-interval 3
- "Every how much seconds the DocView buffer gets refreshed while conversion.
-After such an refresh newly converted pages will be available for
+(defcustom doc-view-conversion-refresh-interval 1
+ "Interval in seconds between refreshes of the DocView buffer while converting.
+After such a refresh newly converted pages will be available for
viewing. If set to nil there won't be any refreshes and the
pages won't be displayed before conversion of the whole document
has finished."
;;;; Internal Variables
-(defvar doc-view-current-files nil
- "Only used internally.")
-
-(defvar doc-view-current-page nil
- "Only used internally.")
+(defun doc-view-new-window-function (winprops)
+ (let ((ol (image-mode-window-get 'overlay winprops)))
+ (if ol
+ (setq ol (copy-overlay ol))
+ (assert (not (get-char-property (point-min) 'display)))
+ (setq ol (make-overlay (point-min) (point-max) nil t))
+ (overlay-put ol 'doc-view t))
+ (overlay-put ol 'window (car winprops))
+ (image-mode-window-put 'overlay ol winprops)))
-(defvar doc-view-current-doc nil
+(defvar doc-view-current-files nil
"Only used internally.")
+(make-variable-buffer-local 'doc-view-current-files)
-(defvar doc-view-current-converter-process nil
+(defvar doc-view-current-converter-processes nil
"Only used internally.")
+(make-variable-buffer-local 'doc-view-current-converter-processes)
(defvar doc-view-current-timer nil
"Only used internally.")
-
-(defvar doc-view-current-slice nil
- "Only used internally.")
+(make-variable-buffer-local 'doc-view-current-timer)
(defvar doc-view-current-cache-dir nil
"Only used internally.")
+(make-variable-buffer-local 'doc-view-current-cache-dir)
(defvar doc-view-current-search-matches nil
"Only used internally.")
+(make-variable-buffer-local 'doc-view-current-search-matches)
-(defvar doc-view-current-image nil
+(defvar doc-view-pending-cache-flush nil
"Only used internally.")
-(defvar doc-view-current-info nil
+(defvar doc-view-previous-major-mode nil
"Only used internally.")
-(defvar doc-view-current-display nil
- "Only used internally.")
+(defvar doc-view-buffer-file-name nil
+ "Only used internally.
+The file name used for conversion. Normally it's the same as
+`buffer-file-name', but for remote files, compressed files and
+files inside an archive it is a temporary copy of
+the (uncompressed, extracted) file residing in
+`doc-view-cache-directory'.")
+
+(defvar doc-view-doc-type nil
+ "The type of document in the current buffer.
+Can be `dvi', `pdf', or `ps'.")
;;;; DocView Keymaps
(defvar doc-view-mode-map
(let ((map (make-sparse-keymap)))
+ (suppress-keymap map)
;; Navigation in the document
(define-key map (kbd "n") 'doc-view-next-page)
(define-key map (kbd "p") 'doc-view-previous-page)
(define-key map (kbd "DEL") 'doc-view-scroll-down-or-previous-page)
(define-key map (kbd "M-<") 'doc-view-first-page)
(define-key map (kbd "M->") 'doc-view-last-page)
- (define-key map (kbd "g") 'doc-view-goto-page)
+ (define-key map [remap goto-line] 'doc-view-goto-page)
+ (define-key map [remap scroll-up] 'image-scroll-up)
+ (define-key map [remap scroll-down] 'image-scroll-down)
+ ;; Zoom in/out.
+ (define-key map "+" 'doc-view-enlarge)
+ (define-key map "-" 'doc-view-shrink)
;; Killing/burying the buffer (and the process)
(define-key map (kbd "q") 'bury-buffer)
(define-key map (kbd "k") 'doc-view-kill-proc-and-buffer)
+ (define-key map (kbd "K") 'doc-view-kill-proc)
;; Slicing the image
(define-key map (kbd "s s") 'doc-view-set-slice)
(define-key map (kbd "s m") 'doc-view-set-slice-using-mouse)
;; Searching
(define-key map (kbd "C-s") 'doc-view-search)
(define-key map (kbd "<find>") 'doc-view-search)
- (define-key map (kbd "C-S-n") 'doc-view-search-next-match)
- (define-key map (kbd "C-S-p") 'doc-view-search-previous-match)
+ (define-key map (kbd "C-r") 'doc-view-search-backward)
;; Scrolling
(define-key map [remap forward-char] 'image-forward-hscroll)
(define-key map [remap backward-char] 'image-backward-hscroll)
+ (define-key map [remap move-end-of-line] 'image-eol)
+ (define-key map [remap move-beginning-of-line] 'image-bol)
(define-key map [remap next-line] 'image-next-line)
(define-key map [remap previous-line] 'image-previous-line)
;; Show the tooltip
(define-key map (kbd "C-t") 'doc-view-show-tooltip)
;; Toggle between text and image display or editing
(define-key map (kbd "C-c C-c") 'doc-view-toggle-display)
- (define-key map (kbd "C-c C-e") 'doc-view-edit-doc)
+ ;; Open a new buffer with doc's text contents
+ (define-key map (kbd "C-c C-t") 'doc-view-open-text)
;; Reconvert the current document
- (define-key map (kbd "g") 'doc-view-reconvert-doc)
- (suppress-keymap map)
+ (define-key map (kbd "g") 'revert-buffer)
+ (define-key map (kbd "r") 'revert-buffer)
map)
"Keymap used by `doc-view-mode' when displaying a doc as a set of images.")
-(defvar doc-view-mode-text-map
+(easy-menu-define doc-view-menu doc-view-mode-map
+ "Menu for Doc View mode."
+ '("DocView"
+ ["Set Slice" doc-view-set-slice-using-mouse]
+ ["Set Slice (manual)" doc-view-set-slice]
+ ["Reset Slice" doc-view-reset-slice]
+ "---"
+ ["Search" doc-view-search]
+ ["Search Backwards" doc-view-search-backward]
+ ["Toggle display" doc-view-toggle-display]
+ ))
+
+(defvar doc-view-minor-mode-map
(let ((map (make-sparse-keymap)))
;; Toggle between text and image display or editing
(define-key map (kbd "C-c C-c") 'doc-view-toggle-display)
- (define-key map (kbd "C-c C-e") 'doc-view-edit-doc)
- ;; Killing/burying the buffer (and the process)
- (define-key map (kbd "q") 'bury-buffer)
- (define-key map (kbd "k") 'doc-view-kill-proc-and-buffer)
- (define-key map (kbd "C-x k") 'doc-view-kill-proc-and-buffer)
map)
- "Keymap used by `doc-view-mode' when displaying a document as text.")
+ "Keymap used by `doc-minor-view-mode'.")
;;;; Navigation Commands
+(defmacro doc-view-current-page (&optional win)
+ `(image-mode-window-get 'page ,win))
+(defmacro doc-view-current-info () `(image-mode-window-get 'info))
+(defmacro doc-view-current-overlay () `(image-mode-window-get 'overlay))
+(defmacro doc-view-current-image () `(image-mode-window-get 'image))
+(defmacro doc-view-current-slice () `(image-mode-window-get 'slice))
+
(defun doc-view-goto-page (page)
"View the page given by PAGE."
(interactive "nPage: ")
(let ((len (length doc-view-current-files)))
(if (< page 1)
(setq page 1)
- (when (> page len)
+ (when (and (> page len)
+ ;; As long as the converter is running, we don't know
+ ;; how many pages will be available.
+ (null doc-view-current-converter-processes))
(setq page len)))
- (setq doc-view-current-page page
- doc-view-current-info
+ (setf (doc-view-current-page) page
+ (doc-view-current-info)
(concat
(propertize
- (format "Page %d of %d."
- doc-view-current-page
- len) 'face 'bold)
+ (format "Page %d of %d." page len) 'face 'bold)
;; Tell user if converting isn't finished yet
- (if doc-view-current-converter-process
+ (if doc-view-current-converter-processes
" (still converting...)\n"
"\n")
;; Display context infos if this page matches the last search
(when (and doc-view-current-search-matches
- (assq doc-view-current-page
- doc-view-current-search-matches))
+ (assq page doc-view-current-search-matches))
(concat (propertize "Search matches:\n" 'face 'bold)
(let ((contexts ""))
- (dolist (m (cdr (assq doc-view-current-page
+ (dolist (m (cdr (assq page
doc-view-current-search-matches)))
(setq contexts (concat contexts " - \"" m "\"\n")))
contexts)))))
;; Update the buffer
- (let ((inhibit-read-only t))
- (erase-buffer)
- (let ((beg (point)))
- (doc-view-insert-image (nth (1- page) doc-view-current-files)
- :pointer 'arrow)
- (put-text-property beg (point) 'help-echo doc-view-current-info))
- (insert "\n" doc-view-current-info)
- (goto-char (point-min))
- (forward-char))
- (set-buffer-modified-p nil)))
+ ;; We used to find the file name from doc-view-current-files but
+ ;; that's not right if the pages are not generated sequentially
+ ;; or if the page isn't in doc-view-current-files yet.
+ (let ((file (expand-file-name (format "page-%d.png" page)
+ (doc-view-current-cache-dir))))
+ (doc-view-insert-image file :pointer 'arrow)
+ (when (and (not (file-exists-p file))
+ doc-view-current-converter-processes)
+ ;; The PNG file hasn't been generated yet.
+ (doc-view-pdf->png-1 doc-view-buffer-file-name file page
+ (lexical-let ((page page)
+ (win (selected-window)))
+ (lambda ()
+ (and (eq (current-buffer) (window-buffer win))
+ ;; If we changed page in the mean
+ ;; time, don't mess things up.
+ (eq (doc-view-current-page win) page)
+ (with-selected-window win
+ (doc-view-goto-page page))))))))
+ (overlay-put (doc-view-current-overlay)
+ 'help-echo (doc-view-current-info))))
(defun doc-view-next-page (&optional arg)
"Browse ARG pages forward."
(interactive "p")
- (doc-view-goto-page (+ doc-view-current-page (or arg 1))))
+ (doc-view-goto-page (+ (doc-view-current-page) (or arg 1))))
(defun doc-view-previous-page (&optional arg)
"Browse ARG pages backward."
(interactive "p")
- (doc-view-goto-page (- doc-view-current-page (or arg 1))))
+ (doc-view-goto-page (- (doc-view-current-page) (or arg 1))))
(defun doc-view-first-page ()
"View the first page."
(defun doc-view-scroll-up-or-next-page ()
"Scroll page up if possible, else goto next page."
(interactive)
- (condition-case nil
- (scroll-up)
- (error (doc-view-next-page))))
+ (when (= (window-vscroll) (image-scroll-up nil))
+ (let ((cur-page (doc-view-current-page)))
+ (doc-view-next-page)
+ (when (/= cur-page (doc-view-current-page))
+ (image-scroll-down nil)))))
(defun doc-view-scroll-down-or-previous-page ()
"Scroll page down if possible, else goto previous page."
(interactive)
- (condition-case nil
- (scroll-down)
- (error (doc-view-previous-page)
- (goto-char (point-max)))))
+ (when (= (window-vscroll) (image-scroll-down nil))
+ (let ((cur-page (doc-view-current-page)))
+ (doc-view-previous-page)
+ (when (/= cur-page (doc-view-current-page))
+ (image-scroll-up nil)))))
+
+;;;; Utility Functions
(defun doc-view-kill-proc ()
- "Kill the current converter process."
+ "Kill the current converter process(es)."
(interactive)
- (when doc-view-current-converter-process
- (kill-process doc-view-current-converter-process))
+ (while doc-view-current-converter-processes
+ (ignore-errors ;; Maybe it's dead already?
+ (kill-process (pop doc-view-current-converter-processes))))
(when doc-view-current-timer
(cancel-timer doc-view-current-timer)
(setq doc-view-current-timer nil))
(when (eq major-mode 'doc-view-mode)
(kill-buffer (current-buffer))))
-;;;; Conversion Functions
-
-(defun doc-view-reconvert-doc (&rest args)
- "Reconvert the current document.
-Should be invoked when the cached images aren't up-to-date."
- (interactive)
- (let ((inhibit-read-only t)
- (doc doc-view-current-doc))
- (doc-view-kill-proc)
- ;; Clear the old cached files
- (when (file-exists-p (doc-view-current-cache-dir))
- (dired-delete-file (doc-view-current-cache-dir) 'always))
- (doc-view-kill-proc-and-buffer)
- (find-file doc)))
+(defun doc-view-make-safe-dir (dir)
+ (condition-case nil
+ (let ((umask (default-file-modes)))
+ (unwind-protect
+ (progn
+ ;; Create temp files with strict access rights. It's easy to
+ ;; loosen them later, whereas it's impossible to close the
+ ;; time-window of loose permissions otherwise.
+ (set-default-file-modes #o0700)
+ (make-directory dir))
+ ;; Reset the umask.
+ (set-default-file-modes umask)))
+ (file-already-exists
+ (if (file-symlink-p dir)
+ (error "Danger: %s points to a symbolic link" dir))
+ ;; In case it was created earlier with looser rights.
+ ;; We could check the mode info returned by file-attributes, but it's
+ ;; a pain to parse and it may not tell you what we want under
+ ;; non-standard file-systems. So let's just say what we want and let
+ ;; the underlying C code and file-system figure it out.
+ ;; This also ends up checking a bunch of useful conditions: it makes
+ ;; sure we have write-access to the directory and that we own it, thus
+ ;; closing a bunch of security holes.
+ (set-file-modes dir #o0700))))
(defun doc-view-current-cache-dir ()
"Return the directory where the png files of the current doc should be saved.
It's a subdirectory of `doc-view-cache-directory'."
(if doc-view-current-cache-dir
doc-view-current-cache-dir
+ ;; Try and make sure doc-view-cache-directory exists and is safe.
+ (doc-view-make-safe-dir doc-view-cache-directory)
+ ;; Now compute the subdirectory to use.
(setq doc-view-current-cache-dir
(file-name-as-directory
- (concat (file-name-as-directory doc-view-cache-directory)
- (let ((doc doc-view-current-doc))
- (with-temp-buffer
- (insert-file-contents-literally doc)
- (md5 (current-buffer)))))))))
-
-(defun doc-view-dvi->pdf-sentinel (proc event)
- "If DVI->PDF conversion was successful, convert the PDF to PNG now."
- (if (not (string-match "finished" event))
- (message "DocView: dvi->pdf process changed status to %s." event)
- (set-buffer (process-get proc 'buffer))
- (setq doc-view-current-converter-process nil
- mode-line-process nil)
- ;; Now go on converting this PDF to a set of PNG files.
- (let* ((pdf (process-get proc 'pdf-file))
- (png (concat (doc-view-current-cache-dir)
- "page-%d.png")))
- (doc-view-pdf/ps->png pdf png))))
-
-(defun doc-view-dvi->pdf (dvi pdf)
- "Convert DVI to PDF asynchrounously."
- (setq doc-view-current-converter-process
- (start-process "dvi->pdf" doc-view-conversion-buffer
- doc-view-dvipdfm-program
- "-o" pdf dvi)
- mode-line-process (list (format ":%s" doc-view-current-converter-process)))
- (set-process-sentinel doc-view-current-converter-process
- 'doc-view-dvi->pdf-sentinel)
- (process-put doc-view-current-converter-process 'buffer (current-buffer))
- (process-put doc-view-current-converter-process 'pdf-file pdf))
-
-(defun doc-view-pdf/ps->png-sentinel (proc event)
- "If PDF/PS->PNG conversion was successful, update the display."
+ (expand-file-name
+ (concat (file-name-nondirectory buffer-file-name)
+ "-"
+ (let ((file doc-view-buffer-file-name))
+ (with-temp-buffer
+ (set-buffer-multibyte nil)
+ (insert-file-contents-literally file)
+ (md5 (current-buffer)))))
+ doc-view-cache-directory)))))
+
+(defun doc-view-remove-if (predicate list)
+ "Return LIST with all items removed that satisfy PREDICATE."
+ (let (new-list)
+ (dolist (item list (nreverse new-list))
+ (when (not (funcall predicate item))
+ (setq new-list (cons item new-list))))))
+
+;;;###autoload
+(defun doc-view-mode-p (type)
+ "Return non-nil if image type TYPE is available for `doc-view'.
+Image types are symbols like `dvi', `postscript' or `pdf'."
+ (and (display-graphic-p)
+ (image-type-available-p 'png)
+ (cond
+ ((eq type 'dvi)
+ (and (doc-view-mode-p 'pdf)
+ (or (and doc-view-dvipdf-program
+ (executable-find doc-view-dvipdf-program))
+ (and doc-view-dvipdfm-program
+ (executable-find doc-view-dvipdfm-program)))))
+ ((or (eq type 'postscript) (eq type 'ps) (eq type 'eps)
+ (eq type 'pdf))
+ (and doc-view-ghostscript-program
+ (executable-find doc-view-ghostscript-program)))
+ (t ;; unknown image type
+ nil))))
+
+;;;; Conversion Functions
+
+(defvar doc-view-shrink-factor 1.125)
+
+(defun doc-view-enlarge (factor)
+ "Enlarge the document."
+ (interactive (list doc-view-shrink-factor))
+ (set (make-local-variable 'doc-view-resolution)
+ (* factor doc-view-resolution))
+ (doc-view-reconvert-doc))
+
+(defun doc-view-shrink (factor)
+ "Shrink the document."
+ (interactive (list doc-view-shrink-factor))
+ (doc-view-enlarge (/ 1.0 factor)))
+
+(defun doc-view-reconvert-doc ()
+ "Reconvert the current document.
+Should be invoked when the cached images aren't up-to-date."
+ (interactive)
+ (doc-view-kill-proc)
+ ;; Clear the old cached files
+ (when (file-exists-p (doc-view-current-cache-dir))
+ (dired-delete-file (doc-view-current-cache-dir) 'always))
+ (doc-view-initiate-display))
+
+(defun doc-view-sentinel (proc event)
+ "Generic sentinel for doc-view conversion processes."
(if (not (string-match "finished" event))
- (message "DocView: converter process changed status to %s." event)
- (set-buffer (process-get proc 'buffer))
- (setq doc-view-current-converter-process nil
- mode-line-process nil)
- (when doc-view-current-timer
- (cancel-timer doc-view-current-timer)
- (setq doc-view-current-timer nil))
- ;; Yippie, finished. Update the display!
- (doc-view-display doc-view-current-doc)))
+ (message "DocView: process %s changed status to %s."
+ (process-name proc) event)
+ (when (buffer-live-p (process-get proc 'buffer))
+ (with-current-buffer (process-get proc 'buffer)
+ (setq doc-view-current-converter-processes
+ (delq proc doc-view-current-converter-processes))
+ (setq mode-line-process
+ (if doc-view-current-converter-processes
+ (format ":%s" (car doc-view-current-converter-processes))))
+ (funcall (process-get proc 'callback))))))
+
+(defun doc-view-start-process (name program args callback)
+ ;; Make sure the process is started in an existing directory, (rather than
+ ;; some file-name-handler-managed dir, for example).
+ (let* ((default-directory (if (file-readable-p default-directory)
+ default-directory
+ (expand-file-name "~/")))
+ (proc (apply 'start-process name doc-view-conversion-buffer
+ program args)))
+ (push proc doc-view-current-converter-processes)
+ (setq mode-line-process (list (format ":%s" proc)))
+ (set-process-sentinel proc 'doc-view-sentinel)
+ (process-put proc 'buffer (current-buffer))
+ (process-put proc 'callback callback)))
+
+(defun doc-view-dvi->pdf (dvi pdf callback)
+ "Convert DVI to PDF asynchronously and call CALLBACK when finished."
+ ;; Prefer dvipdf over dvipdfm, because the latter has problems if the DVI
+ ;; references and includes other PS files.
+ (if (and doc-view-dvipdf-program
+ (executable-find doc-view-dvipdf-program))
+ (doc-view-start-process "dvi->pdf" doc-view-dvipdf-program
+ (list dvi pdf)
+ callback)
+ (doc-view-start-process "dvi->pdf" doc-view-dvipdfm-program
+ (list "-o" pdf dvi)
+ callback)))
+
(defun doc-view-pdf/ps->png (pdf-ps png)
- "Convert PDF-PS to PNG asynchrounously."
- (setq doc-view-current-converter-process
- (apply 'start-process
- (append (list "pdf/ps->png" doc-view-conversion-buffer
- doc-view-ghostscript-program)
- doc-view-ghostscript-options
- (list (concat "-sOutputFile=" png))
- (list pdf-ps)))
- mode-line-process (list (format ":%s" doc-view-current-converter-process)))
- (process-put doc-view-current-converter-process
- 'buffer (current-buffer))
- (set-process-sentinel doc-view-current-converter-process
- 'doc-view-pdf/ps->png-sentinel)
+ "Convert PDF-PS to PNG asynchronously."
+ (doc-view-start-process
+ "pdf/ps->png" doc-view-ghostscript-program
+ (append doc-view-ghostscript-options
+ (list (format "-r%d" (round doc-view-resolution))
+ (concat "-sOutputFile=" png)
+ pdf-ps))
+ (lambda ()
+ (when doc-view-current-timer
+ (cancel-timer doc-view-current-timer)
+ (setq doc-view-current-timer nil))
+ (doc-view-display (current-buffer) 'force)))
+ ;; Update the displayed pages as soon as they're done generating.
(when doc-view-conversion-refresh-interval
(setq doc-view-current-timer
- (run-at-time "1 secs" doc-view-conversion-refresh-interval
- 'doc-view-display-maybe
- doc-view-current-doc))))
-
-(defun doc-view-pdf->txt-sentinel (proc event)
- (if (not (string-match "finished" event))
- (message "DocView: converter process changed status to %s." event)
- (let ((current-buffer (current-buffer))
- (proc-buffer (process-get proc 'buffer)))
- (set-buffer proc-buffer)
- (setq doc-view-current-converter-process nil
- mode-line-process nil)
- ;; If the user looks at the DocView buffer where the conversion was
- ;; performed, search anew. This time it will be queried for a regexp.
- (when (eq current-buffer proc-buffer)
- (doc-view-search)))))
-
-(defun doc-view-pdf->txt (pdf txt)
- "Convert PDF to TXT asynchrounously."
- (setq doc-view-current-converter-process
- (start-process "pdf->txt" doc-view-conversion-buffer
- doc-view-pdftotext-program "-raw"
- pdf txt)
- mode-line-process (list (format ":%s" doc-view-current-converter-process)))
- (set-process-sentinel doc-view-current-converter-process
- 'doc-view-pdf->txt-sentinel)
- (process-put doc-view-current-converter-process 'buffer (current-buffer)))
-
-(defun doc-view-ps->pdf-sentinel (proc event)
- (if (not (string-match "finished" event))
- (message "DocView: converter process changed status to %s." event)
- (set-buffer (process-get proc 'buffer))
- (setq doc-view-current-converter-process nil
- mode-line-process nil)
- ;; Now we can transform to plain text.
- (doc-view-pdf->txt (process-get proc 'pdf-file)
- (concat (doc-view-current-cache-dir)
- "doc.txt"))))
-
-(defun doc-view-ps->pdf (ps pdf)
- "Convert PS to PDF asynchronously."
- (setq doc-view-current-converter-process
- (start-process "ps->pdf" doc-view-conversion-buffer
- doc-view-ps2pdf-program
- ps pdf
- ;; Avoid security problems when rendering files from
- ;; untrusted sources.
- "-dSAFER")
- mode-line-process (list (format ":%s" doc-view-current-converter-process)))
- (set-process-sentinel doc-view-current-converter-process
- 'doc-view-ps->pdf-sentinel)
- (process-put doc-view-current-converter-process 'buffer (current-buffer))
- (process-put doc-view-current-converter-process 'pdf-file pdf))
+ (run-at-time "1 secs" doc-view-conversion-refresh-interval
+ 'doc-view-display
+ (current-buffer)))))
+
+(defun doc-view-pdf->png-1 (pdf png page callback)
+ "Convert a PAGE of a PDF file to PNG asynchronously.
+Call CALLBACK with no arguments when done."
+ (doc-view-start-process
+ "pdf->png-1" doc-view-ghostscript-program
+ (append doc-view-ghostscript-options
+ (list (format "-r%d" (round doc-view-resolution))
+ ;; Sadly, `gs' only supports the page-range
+ ;; for PDF files.
+ (format "-dFirstPage=%d" page)
+ (format "-dLastPage=%d" page)
+ (concat "-sOutputFile=" png)
+ pdf))
+ callback))
+
+(defun doc-view-pdf->png (pdf png pages)
+ "Convert a PDF file to PNG asynchronously.
+Start by converting PAGES, and then the rest."
+ (if (null pages)
+ (doc-view-pdf/ps->png pdf png)
+ ;; We could render several `pages' with a single process if they're
+ ;; (almost) consecutive, but since in 99% of the cases, there'll be only
+ ;; a single page anyway, and of the remaining 1%, few cases will have
+ ;; consecutive pages, it's not worth the trouble.
+ (lexical-let ((pdf pdf) (png png) (rest (cdr pages)))
+ (doc-view-pdf->png-1
+ pdf (format png (car pages)) (car pages)
+ (lambda ()
+ (if rest
+ (doc-view-pdf->png pdf png rest)
+ ;; Yippie, the important pages are done, update the display.
+ (clear-image-cache)
+ ;; Convert the rest of the pages.
+ (doc-view-pdf/ps->png pdf png)))))))
+
+(defun doc-view-pdf->txt (pdf txt callback)
+ "Convert PDF to TXT asynchronously and call CALLBACK when finished."
+ (doc-view-start-process "pdf->txt" doc-view-pdftotext-program
+ (list "-raw" pdf txt)
+ callback))
+
+(defun doc-view-doc->txt (txt callback)
+ "Convert the current document to text and call CALLBACK when done."
+ (make-directory (doc-view-current-cache-dir) t)
+ (case doc-view-doc-type
+ (pdf
+ ;; Doc is a PDF, so convert it to TXT
+ (doc-view-pdf->txt doc-view-buffer-file-name txt callback))
+ (ps
+ ;; Doc is a PS, so convert it to PDF (which will be converted to
+ ;; TXT thereafter).
+ (lexical-let ((pdf (expand-file-name "doc.pdf"
+ (doc-view-current-cache-dir)))
+ (txt txt)
+ (callback callback))
+ (doc-view-ps->pdf doc-view-buffer-file-name pdf
+ (lambda () (doc-view-pdf->txt pdf txt callback)))))
+ (dvi
+ ;; Doc is a DVI. This means that a doc.pdf already exists in its
+ ;; cache subdirectory.
+ (doc-view-pdf->txt (expand-file-name "doc.pdf"
+ (doc-view-current-cache-dir))
+ txt callback))
+ (t (error "DocView doesn't know what to do"))))
+
+(defun doc-view-ps->pdf (ps pdf callback)
+ "Convert PS to PDF asynchronously and call CALLBACK when finished."
+ (doc-view-start-process "ps->pdf" doc-view-ps2pdf-program
+ (list
+ ;; Avoid security problems when rendering files from
+ ;; untrusted sources.
+ "-dSAFER"
+ ;; in-file and out-file
+ ps pdf)
+ callback))
+
+(defun doc-view-active-pages ()
+ (let ((pages ()))
+ (dolist (win (get-buffer-window-list (current-buffer) nil 'visible))
+ (let ((page (image-mode-window-get 'page win)))
+ (unless (memq page pages) (push page pages))))
+ pages))
(defun doc-view-convert-current-doc ()
- "Convert `doc-view-current-doc' to a set of png files, one file per page.
+ "Convert `doc-view-buffer-file-name' to a set of png files, one file per page.
Those files are saved in the directory given by the function
`doc-view-current-cache-dir'."
- (clear-image-cache)
- (let ((png-file (concat (doc-view-current-cache-dir)
- "page-%d.png")))
- (make-directory doc-view-current-cache-dir t)
- (if (not (string= (file-name-extension doc-view-current-doc) "dvi"))
- ;; Convert to PNG images.
- (doc-view-pdf/ps->png doc-view-current-doc png-file)
- ;; DVI files have to be converted to PDF before Ghostscript can process
- ;; it.
- (doc-view-dvi->pdf doc-view-current-doc
- (concat (file-name-as-directory doc-view-current-cache-dir)
- "doc.pdf")))))
+ ;; Let stale files still display while we recompute the new ones, so only
+ ;; flush the cache when the conversion is over. One of the reasons why it
+ ;; is important to keep displaying the stale page is so that revert-buffer
+ ;; preserves the horizontal/vertical scroll settings (which are otherwise
+ ;; resets during the redisplay).
+ (setq doc-view-pending-cache-flush t)
+ (let ((png-file (expand-file-name "page-%d.png"
+ (doc-view-current-cache-dir))))
+ (make-directory (doc-view-current-cache-dir) t)
+ (case doc-view-doc-type
+ (dvi
+ ;; DVI files have to be converted to PDF before Ghostscript can process
+ ;; it.
+ (lexical-let
+ ((pdf (expand-file-name "doc.pdf" doc-view-current-cache-dir))
+ (png-file png-file))
+ (doc-view-dvi->pdf doc-view-buffer-file-name pdf
+ (lambda () (doc-view-pdf/ps->png pdf png-file)))))
+ (pdf
+ (let ((pages (doc-view-active-pages)))
+ ;; Convert PDF to PNG images starting with the active pages.
+ (doc-view-pdf->png doc-view-buffer-file-name png-file pages)))
+ (t
+ ;; Convert to PNG images.
+ (doc-view-pdf/ps->png doc-view-buffer-file-name png-file)))))
;;;; Slicing
See `doc-view-set-slice-using-mouse' for a more convenient way to
do that. To reset the slice use `doc-view-reset-slice'."
(interactive
- (let* ((size (image-size doc-view-current-image t))
+ (let* ((size (image-size (doc-view-current-image) t))
(a (read-number (format "Top-left X (0..%d): " (car size))))
(b (read-number (format "Top-left Y (0..%d): " (cdr size))))
(c (read-number (format "Width (0..%d): " (- (car size) a))))
(d (read-number (format "Height (0..%d): " (- (cdr size) b)))))
(list a b c d)))
- (setq doc-view-current-slice (list x y width height))
+ (setf (doc-view-current-slice) (list x y width height))
;; Redisplay
- (doc-view-goto-page doc-view-current-page))
+ (doc-view-goto-page (doc-view-current-page)))
(defun doc-view-set-slice-using-mouse ()
"Set the slice of the images that should be displayed.
(defun doc-view-reset-slice ()
"Reset the current slice.
-After calling this function the whole pages will be visible
-again."
+After calling this function whole pages will be visible again."
(interactive)
- (setq doc-view-current-slice nil)
+ (setf (doc-view-current-slice) nil)
;; Redisplay
- (doc-view-goto-page doc-view-current-page))
+ (doc-view-goto-page (doc-view-current-page)))
;;;; Display
(defun doc-view-insert-image (file &rest args)
"Insert the given png FILE.
ARGS is a list of image descriptors."
- (let ((image (apply 'create-image file 'png nil args)))
- (setq doc-view-current-image image)
- (insert-image image (concat "[" file "]") nil doc-view-current-slice)))
+ (when doc-view-pending-cache-flush
+ (clear-image-cache)
+ (setq doc-view-pending-cache-flush nil))
+ (let ((ol (doc-view-current-overlay))
+ (image (if (and file (file-readable-p file))
+ (apply 'create-image file 'png nil args)))
+ (slice (doc-view-current-slice)))
+ (setf (doc-view-current-image) image)
+ (move-overlay ol (point-min) (point-max))
+ (overlay-put ol 'display
+ (cond
+ (image
+ (if slice
+ (list (cons 'slice slice) image)
+ image))
+ ;; We're trying to display a page that doesn't exist.
+ (doc-view-current-converter-processes
+ ;; Maybe the page doesn't exist *yet*.
+ "Cannot display this page (yet)!")
+ (t
+ ;; Typically happens if the conversion process somehow
+ ;; failed. Better not signal an error here because it
+ ;; could prevent a subsequent reconversion from fixing
+ ;; the problem.
+ (concat "Cannot display this page!\n"
+ "Maybe because of a conversion failure!"))))
+ (let ((win (overlay-get ol 'window)))
+ (if (stringp (overlay-get ol 'display))
+ (progn ;Make sure the text is not scrolled out of view.
+ (set-window-hscroll win 0)
+ (set-window-vscroll win 0))
+ (let ((hscroll (image-mode-window-get 'hscroll win))
+ (vscroll (image-mode-window-get 'vscroll win)))
+ ;; Reset scroll settings, in case they were changed.
+ (if hscroll (set-window-hscroll win hscroll))
+ (if vscroll (set-window-vscroll win vscroll)))))))
(defun doc-view-sort (a b)
"Return non-nil if A should be sorted before B.
Predicate for sorting `doc-view-current-files'."
- (if (< (length a) (length b))
- t
- (if (> (length a) (length b))
- nil
- (string< a b))))
-
-(defun doc-view-display-maybe (doc)
- "Call `doc-view-display' iff we're in the image display."
- (when (eq doc-view-current-display 'image)
- (doc-view-display doc)))
-
-(defun doc-view-display (doc)
- "Start viewing the document DOC."
- (set-buffer (get-file-buffer doc))
- (setq doc-view-current-files
- (sort (directory-files (doc-view-current-cache-dir) t
- "page-[0-9]+\\.png" t)
- 'doc-view-sort))
- (when (> (length doc-view-current-files) 0)
- (doc-view-goto-page doc-view-current-page)))
+ (or (< (length a) (length b))
+ (and (= (length a) (length b))
+ (string< a b))))
+
+(defun doc-view-display (buffer &optional force)
+ "Start viewing the document in BUFFER.
+If FORCE is non-nil, start viewing even if the document does not
+have the page we want to view."
+ (with-current-buffer buffer
+ (let ((prev-pages doc-view-current-files))
+ (setq doc-view-current-files
+ (sort (directory-files (doc-view-current-cache-dir) t
+ "page-[0-9]+\\.png" t)
+ 'doc-view-sort))
+ (dolist (win (or (get-buffer-window-list buffer nil t)
+ (list (selected-window))))
+ (let* ((page (doc-view-current-page win))
+ (pagefile (expand-file-name (format "page-%d.png" page)
+ (doc-view-current-cache-dir))))
+ (when (or force
+ (and (not (member pagefile prev-pages))
+ (member pagefile doc-view-current-files)))
+ (with-selected-window win
+ (assert (eq (current-buffer) buffer))
+ (doc-view-goto-page page))))))))
(defun doc-view-buffer-message ()
- (insert (propertize "Welcome to DocView!" 'face 'bold)
- "\n"
- "
-If you see this buffer it means that the document you want to
-view gets converted to PNG now and the conversion of the first
-page hasn't finished yet or
+ ;; Only show this message initially, not when refreshing the buffer (in which
+ ;; case it's better to keep displaying the "stale" page while computing
+ ;; the fresh new ones).
+ (unless (overlay-get (doc-view-current-overlay) 'display)
+ (overlay-put (doc-view-current-overlay) 'display
+ (concat (propertize "Welcome to DocView!" 'face 'bold)
+ "\n"
+ "
+If you see this buffer it means that the document you want to view is being
+converted to PNG and the conversion of the first page hasn't finished yet or
`doc-view-conversion-refresh-interval' is set to nil.
For now these keys are useful:
`q' : Bury this buffer. Conversion will go on in background.
-`k' : Kill the conversion process and this buffer.\n")
- (set-buffer-modified-p nil))
+`k' : Kill the conversion process and this buffer.
+`K' : Kill the conversion process.\n"))))
(defun doc-view-show-tooltip ()
(interactive)
- (tooltip-show doc-view-current-info))
+ (tooltip-show (doc-view-current-info)))
+
+(defun doc-view-open-text ()
+ "Open a buffer with the current doc's contents as text."
+ (interactive)
+ (if doc-view-current-converter-processes
+ (message "DocView: please wait till conversion finished.")
+ (let ((txt (expand-file-name "doc.txt" (doc-view-current-cache-dir))))
+ (if (file-readable-p txt)
+ (find-file txt)
+ (doc-view-doc->txt txt 'doc-view-open-text)))))
+
+;;;;; Toggle between editing and viewing
-;;;;; Toggle between text and image display
(defun doc-view-toggle-display ()
- "Start or stop displaying a document file as a set of images.
-This command toggles between showing the text of the document
-file and showing the document as a set of images."
- (interactive)
- (if (get-text-property (point-min) 'display)
- ;; Switch to text display
- (let ((inhibit-read-only t))
- (erase-buffer)
- (insert-file-contents doc-view-current-doc)
- (use-local-map doc-view-mode-text-map)
- (setq mode-name "DocView[text]"
- doc-view-current-display 'text)
- (if (called-interactively-p)
- (message "Repeat this command to go back to displaying the file as images")))
- ;; Switch to image display
- (let ((inhibit-read-only t))
- (erase-buffer)
- (doc-view-buffer-message)
- (setq doc-view-current-page (or doc-view-current-page 1))
- (if (file-exists-p (doc-view-current-cache-dir))
- (progn
- (message "DocView: using cached files!")
- (doc-view-display doc-view-current-doc))
- (doc-view-convert-current-doc))
- (use-local-map doc-view-mode-map)
- (setq mode-name (format "DocView")
- doc-view-current-display 'image)
- (if (called-interactively-p)
- (message "Repeat this command to go back to displaying the file as text"))))
- (set-buffer-modified-p nil))
-
-;;;;; Leave doc-view-mode and open the file for edit
-
-(defun doc-view-edit-doc ()
- "Leave `doc-view-mode' and open the current doc with an appropriate editing mode."
+ "Toggle between editing a document as text or viewing it."
(interactive)
- (let ((filename doc-view-current-doc)
- (auto-mode-alist (append '(("\\.[eE]?[pP][sS]\\'" . ps-mode)
- ("\\.\\(pdf\\|PDF\\|dvi\\|DVI\\)$" . fundamental-mode))
- auto-mode-alist)))
- (kill-buffer (current-buffer))
- (find-file filename)))
+ (if (eq major-mode 'doc-view-mode)
+ ;; Switch to editing mode
+ (progn
+ (doc-view-kill-proc)
+ (setq buffer-read-only nil)
+ (remove-overlays (point-min) (point-max) 'doc-view t)
+ (set (make-local-variable 'image-mode-winprops-alist) t)
+ ;; Switch to the previously used major mode or fall back to fundamental
+ ;; mode.
+ (if doc-view-previous-major-mode
+ (funcall doc-view-previous-major-mode)
+ (fundamental-mode))
+ (doc-view-minor-mode 1))
+ ;; Switch to doc-view-mode
+ (when (and (buffer-modified-p)
+ (y-or-n-p "The buffer has been modified. Save the changes? "))
+ (save-buffer))
+ (doc-view-mode)))
;;;; Searching
+
(defun doc-view-search-internal (regexp file)
"Return a list of FILE's pages that contain text matching REGEXP.
The value is an alist of the form (PAGE CONTEXTS) where PAGE is
matches)
(while (re-search-forward (concat "\\(?:\\([\f]\\)\\|\\("
regexp "\\)\\)") nil t)
- (when (match-string 1) (incf page))
+ (when (match-string 1) (setq page (1+ page)))
(when (match-string 2)
(if (/= page lastpage)
- (setq matches (push (cons page
- (list (buffer-substring
- (line-beginning-position)
- (line-end-position))))
- matches))
+ (push (cons page
+ (list (buffer-substring
+ (line-beginning-position)
+ (line-end-position))))
+ matches)
(setq matches (cons
(append
(or
(setq no (+ no (1- (length p)))))
no))
-(defun doc-view-search ()
- "Query for a regexp and search the current document.
+(defun doc-view-search-backward (new-query)
+ "Call `doc-view-search' for backward search.
+If prefix NEW-QUERY is given, ask for a new regexp."
+ (interactive "P")
+ (doc-view-search new-query t))
+
+(defun doc-view-search (new-query &optional backward)
+ "Jump to the next match or initiate a new search if NEW-QUERY is given.
If the current document hasn't been transformed to plain text
-till now do that first. You should try searching anew when the
-conversion finished."
- (interactive)
- ;; New search, so forget the old results.
- (setq doc-view-current-search-matches nil)
- (let ((txt (concat (doc-view-current-cache-dir)
- "doc.txt")))
- (if (file-readable-p txt)
- (progn
- (setq doc-view-current-search-matches
- (doc-view-search-internal
- (read-from-minibuffer "Regexp: ")
- txt))
- (message "DocView: search yielded %d matches."
- (doc-view-search-no-of-matches
- doc-view-current-search-matches)))
- ;; We must convert to TXT first!
- (if doc-view-current-converter-process
- (message "DocView: please wait till conversion finished.")
- (let ((ext (file-name-extension doc-view-current-doc)))
- (cond
- ((string= ext "pdf")
- ;; Doc is a PDF, so convert it to TXT
- (doc-view-pdf->txt doc-view-current-doc txt))
- ((string= ext "ps")
- ;; Doc is a PS, so convert it to PDF (which will be converted to
- ;; TXT thereafter).
- (doc-view-ps->pdf doc-view-current-doc
- (concat (doc-view-current-cache-dir)
- "doc.pdf")))
- ((string= ext "dvi")
- ;; Doc is a DVI. This means that a doc.pdf already exists in its
- ;; cache subdirectory.
- (doc-view-pdf->txt (concat (doc-view-current-cache-dir)
- "doc.pdf")
- txt))
- (t (error "DocView doesn't know what to do"))))))))
+till now do that first.
+If BACKWARD is non-nil, jump to the previous match."
+ (interactive "P")
+ (if (and (not new-query)
+ doc-view-current-search-matches)
+ (if backward
+ (doc-view-search-previous-match 1)
+ (doc-view-search-next-match 1))
+ ;; New search, so forget the old results.
+ (setq doc-view-current-search-matches nil)
+ (let ((txt (expand-file-name "doc.txt"
+ (doc-view-current-cache-dir))))
+ (if (file-readable-p txt)
+ (progn
+ (setq doc-view-current-search-matches
+ (doc-view-search-internal
+ (read-from-minibuffer "Regexp: ")
+ txt))
+ (message "DocView: search yielded %d matches."
+ (doc-view-search-no-of-matches
+ doc-view-current-search-matches)))
+ ;; We must convert to TXT first!
+ (if doc-view-current-converter-processes
+ (message "DocView: please wait till conversion finished.")
+ (doc-view-doc->txt txt (lambda () (doc-view-search nil))))))))
(defun doc-view-search-next-match (arg)
"Go to the ARGth next matching page."
(interactive "p")
- (let* ((next-pages (remove-if (lambda (i) (<= (car i) doc-view-current-page))
- doc-view-current-search-matches))
+ (let* ((next-pages (doc-view-remove-if
+ (lambda (i) (<= (car i) (doc-view-current-page)))
+ doc-view-current-search-matches))
(page (car (nth (1- arg) next-pages))))
(if page
(doc-view-goto-page page)
(defun doc-view-search-previous-match (arg)
"Go to the ARGth previous matching page."
(interactive "p")
- (let* ((prev-pages (remove-if (lambda (i) (>= (car i) doc-view-current-page))
- doc-view-current-search-matches))
+ (let* ((prev-pages (doc-view-remove-if
+ (lambda (i) (>= (car i) (doc-view-current-page)))
+ doc-view-current-search-matches))
(page (car (nth (1- arg) (nreverse prev-pages)))))
(if page
(doc-view-goto-page page)
;;;; User interface commands and the mode
-(put 'doc-view-mode 'mode-class 'special)
+;; (put 'doc-view-mode 'mode-class 'special)
+
+(defun doc-view-already-converted-p ()
+ "Return non-nil if the current doc was already converted."
+ (and (file-exists-p (doc-view-current-cache-dir))
+ (> (length (directory-files (doc-view-current-cache-dir) nil "\\.png$")) 0)))
+
+(defun doc-view-initiate-display ()
+ ;; Switch to image display if possible
+ (if (doc-view-mode-p doc-view-doc-type)
+ (progn
+ (doc-view-buffer-message)
+ (setf (doc-view-current-page) (or (doc-view-current-page) 1))
+ (if (doc-view-already-converted-p)
+ (progn
+ (message "DocView: using cached files!")
+ (doc-view-display (current-buffer) 'force))
+ (doc-view-convert-current-doc))
+ (message
+ "%s"
+ (substitute-command-keys
+ (concat "Type \\[doc-view-toggle-display] to toggle between "
+ "editing or viewing the document."))))
+ (message
+ "%s"
+ (substitute-command-keys
+ (concat "No image (png) support available or some conversion utility for "
+ (file-name-extension doc-view-buffer-file-name)" files is missing. "
+ "Type \\[doc-view-toggle-display] to switch to an editing mode or "
+ "\\[doc-view-open-text] to open a buffer showing the doc as text.")))))
+
+(defvar bookmark-make-record-function)
+
+(defun doc-view-clone-buffer-hook ()
+ ;; FIXME: There are several potential problems linked with reconversion
+ ;; and auto-revert when we have indirect buffers because they share their
+ ;; /tmp cache directory. This sharing is good (you'd rather not reconvert
+ ;; for each clone), but that means that clones need to collaborate a bit.
+ ;; I guess it mostly means: detect when a reconversion process is already
+ ;; running, and run the sentinel in all clones.
+ ;;
+ ;; Maybe the clones should really have a separate /tmp directory
+ ;; so they could have a different resolution and you could use clones
+ ;; for zooming.
+ (remove-overlays (point-min) (point-max) 'doc-view t)
+ (if (consp image-mode-winprops-alist) (setq image-mode-winprops-alist nil)))
+
+(defun doc-view-intersection (l1 l2)
+ (let ((l ()))
+ (dolist (x l1) (if (memq x l2) (push x l)))
+ l))
;;;###autoload
-(define-derived-mode doc-view-mode nil "DocView"
+(defun doc-view-mode ()
"Major mode in DocView buffers.
You can use \\<doc-view-mode-map>\\[doc-view-toggle-display] to
-toggle between display as a set of images and display as text."
- :group 'doc-view
- (make-local-variable 'doc-view-current-files)
- (make-local-variable 'doc-view-current-doc)
- (make-local-variable 'doc-view-current-image)
- (make-local-variable 'doc-view-current-page)
- (make-local-variable 'doc-view-current-converter-process)
- (make-local-variable 'doc-view-current-timer)
- (make-local-variable 'doc-view-current-slice)
- (make-local-variable 'doc-view-current-cache-dir)
- (make-local-variable 'doc-view-current-info)
- (make-local-variable 'doc-view-current-search-matches)
- (setq doc-view-current-doc (buffer-file-name))
- (insert-file-contents doc-view-current-doc)
- (use-local-map doc-view-mode-text-map)
- (setq mode-name "DocView[text]"
- doc-view-current-display 'text
+toggle between displaying the document or editing it as text.
+\\{doc-view-mode-map}"
+ (interactive)
+
+ (let* ((prev-major-mode (if (eq major-mode 'doc-view-mode)
+ doc-view-previous-major-mode
+ major-mode)))
+ (kill-all-local-variables)
+ (set (make-local-variable 'doc-view-previous-major-mode) prev-major-mode))
+
+ ;; Figure out the document type.
+ (let ((name-types
+ (when buffer-file-name
+ (cdr (assoc (file-name-extension buffer-file-name)
+ '(("dvi" dvi)
+ ("pdf" pdf)
+ ("epdf" pdf)
+ ("ps" ps)
+ ("eps" ps))))))
+ (content-types
+ (save-excursion
+ (goto-char (point-min))
+ (cond
+ ((looking-at "%!") '(ps))
+ ((looking-at "%PDF") '(pdf))
+ ((looking-at "\367\002") '(dvi))))))
+ (set (make-local-variable 'doc-view-doc-type)
+ (car (or (doc-view-intersection name-types content-types)
+ (when (and name-types content-types)
+ (error "Conflicting types: name says %s but content says %s"
+ name-types content-types))
+ name-types content-types
+ (error "Cannot determine the document type")))))
+
+ (doc-view-make-safe-dir doc-view-cache-directory)
+ ;; Handle compressed files, remote files, files inside archives
+ (set (make-local-variable 'doc-view-buffer-file-name)
+ (cond
+ (jka-compr-really-do-compress
+ (expand-file-name
+ (file-name-nondirectory
+ (file-name-sans-extension buffer-file-name))
+ doc-view-cache-directory))
+ ;; Is the file readable by local processes?
+ ;; We used to use `file-remote-p' but it's unclear what it's
+ ;; supposed to return nil for things like local files accessed via
+ ;; `su' or via file://...
+ ((let ((file-name-handler-alist nil))
+ (not (file-readable-p buffer-file-name)))
+ (expand-file-name
+ (file-name-nondirectory buffer-file-name)
+ doc-view-cache-directory))
+ (t buffer-file-name)))
+ (when (not (string= doc-view-buffer-file-name buffer-file-name))
+ (write-region nil nil doc-view-buffer-file-name))
+
+ (add-hook 'change-major-mode-hook
+ (lambda ()
+ (doc-view-kill-proc)
+ (remove-overlays (point-min) (point-max) 'doc-view t))
+ nil t)
+ (add-hook 'clone-indirect-buffer-hook 'doc-view-clone-buffer-hook nil t)
+ (add-hook 'kill-buffer 'doc-view-kill-proc nil t)
+
+ (remove-overlays (point-min) (point-max) 'doc-view t) ;Just in case.
+ ;; Keep track of display info ([vh]scroll, page number, overlay, ...)
+ ;; for each window in which this document is shown.
+ (add-hook 'image-mode-new-window-functions
+ 'doc-view-new-window-function nil t)
+ (image-mode-setup-winprops)
+
+ (set (make-local-variable 'mode-line-position)
+ '(" P" (:eval (number-to-string (doc-view-current-page)))
+ "/" (:eval (number-to-string (length doc-view-current-files)))))
+ ;; Don't scroll unless the user specifically asked for it.
+ (set (make-local-variable 'auto-hscroll-mode) nil)
+ (set (make-local-variable 'cursor-type) nil)
+ (use-local-map doc-view-mode-map)
+ (set (make-local-variable 'after-revert-hook) 'doc-view-reconvert-doc)
+ (set (make-local-variable 'bookmark-make-record-function)
+ 'doc-view-bookmark-make-record)
+ (setq mode-name "DocView"
buffer-read-only t
- revert-buffer-function 'doc-view-reconvert-doc)
- ;; Switch to image display if possible
- (if (and (display-images-p)
- (image-type-available-p 'png)
- (not (get-text-property (point-min) 'display)))
- (doc-view-toggle-display))
- (message
- "%s"
- (substitute-command-keys
- "Type \\[doc-view-toggle-display] to toggle between image and text display.")))
+ major-mode 'doc-view-mode)
+ (doc-view-initiate-display)
+ (run-mode-hooks 'doc-view-mode-hook))
+
+;;;###autoload
+(define-minor-mode doc-view-minor-mode
+ "Toggle Doc view minor mode.
+With arg, turn Doc view minor mode on if arg is positive, off otherwise.
+See the command `doc-view-mode' for more information on this mode."
+ nil " DocView" doc-view-minor-mode-map
+ :group 'doc-view
+ (when doc-view-minor-mode
+ (add-hook 'change-major-mode-hook (lambda () (doc-view-minor-mode -1)) nil t)
+ (message
+ "%s"
+ (substitute-command-keys
+ "Type \\[doc-view-toggle-display] to toggle between editing or viewing the document."))))
(defun doc-view-clear-cache ()
"Delete the whole cache (`doc-view-cache-directory')."
(interactive)
- (dired-delete-file doc-view-cache-directory 'always)
- (make-directory doc-view-cache-directory))
+ (dired-delete-file doc-view-cache-directory 'always))
(defun doc-view-dired-cache ()
"Open `dired' in `doc-view-cache-directory'."
(interactive)
(dired doc-view-cache-directory))
+
+;;;; Bookmark integration
+
+(declare-function bookmark-buffer-file-name "bookmark" ())
+(declare-function bookmark-prop-get "bookmark" (bookmark prop))
+
+(defun doc-view-bookmark-make-record ()
+ `((filename . ,(bookmark-buffer-file-name))
+ (page . ,(doc-view-current-page))
+ (handler . doc-view-bookmark-jump)))
+
+
+;;;###autoload
+(defun doc-view-bookmark-jump (bmk)
+ ;; This implements the `handler' function interface for record type
+ ;; returned by `doc-view-bookmark-make-record', which see.
+ (let ((filename (bookmark-prop-get bmk 'filename))
+ (page (bookmark-prop-get bmk 'page)))
+ (with-current-buffer (find-file-noselect filename)
+ (when (not (eq major-mode 'doc-view-mode))
+ (doc-view-toggle-display))
+ (with-selected-window
+ (or (get-buffer-window (current-buffer) 0)
+ (selected-window))
+ (doc-view-goto-page page))
+ `((buffer ,(current-buffer)) (position ,1)))))
+
+
(provide 'doc-view)
;; Local Variables: