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|
;;; eudc-bob.el --- Binary Objects Support for EUDC
;; Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
;; 2008, 2009, 2010 Free Software Foundation, Inc.
;; Author: Oscar Figueiredo <oscar@cpe.fr>
;; Maintainer: Pavel Janík <Pavel@Janik.cz>
;; Keywords: comm
;; This file is part of GNU Emacs.
;; 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 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
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Usage:
;; See the corresponding info file
;;; Code:
(require 'eudc)
(defvar eudc-bob-generic-keymap nil
"Keymap for multimedia objects.")
(defvar eudc-bob-image-keymap nil
"Keymap for inline images.")
(defvar eudc-bob-sound-keymap nil
"Keymap for inline sounds.")
(defvar eudc-bob-url-keymap nil
"Keymap for inline urls.")
(defvar eudc-bob-mail-keymap nil
"Keymap for inline e-mail addresses.")
(defvar eudc-bob-generic-menu
'("EUDC Binary Object Menu"
["---" nil nil]
["Pipe to external program" eudc-bob-pipe-object-to-external-program t]
["Save object" eudc-bob-save-object t]))
(defvar eudc-bob-image-menu
`("EUDC Image Menu"
["---" nil nil]
["Toggle inline display" eudc-bob-toggle-inline-display
(eudc-bob-can-display-inline-images)]
,@(cdr (cdr eudc-bob-generic-menu))))
(defvar eudc-bob-sound-menu
`("EUDC Sound Menu"
["---" nil nil]
["Play sound" eudc-bob-play-sound-at-point
(fboundp 'play-sound)]
,@(cdr (cdr eudc-bob-generic-menu))))
(defun eudc-jump-to-event (event)
"Jump to the window and point where EVENT occurred."
(if (fboundp 'event-closest-point)
(goto-char (event-closest-point event))
(set-buffer (window-buffer (posn-window (event-start event))))
(goto-char (posn-point (event-start event)))))
(defun eudc-bob-get-overlay-prop (prop)
"Get property PROP from one of the overlays around."
(let ((overlays (append (overlays-at (1- (point)))
(overlays-at (point))))
overlay value
(notfound t))
(while (and notfound
(setq overlay (car overlays)))
(if (setq value (overlay-get overlay prop))
(setq notfound nil))
(setq overlays (cdr overlays)))
value))
(defun eudc-bob-can-display-inline-images ()
"Return non-nil if we can display images inline."
(if (fboundp 'console-type)
(and (memq (console-type) '(x mswindows))
(fboundp 'make-glyph))
(and (fboundp 'display-graphic-p)
(display-graphic-p))))
(defun eudc-bob-make-button (label keymap &optional menu plist)
"Create a button with LABEL.
Attach KEYMAP, MENU and properties from PLIST to a new overlay covering
LABEL."
(let (overlay
(p (point))
prop val)
(insert label)
(put-text-property p (point) 'face 'bold)
(setq overlay (make-overlay p (point)))
(overlay-put overlay 'mouse-face 'highlight)
(overlay-put overlay 'keymap keymap)
(overlay-put overlay 'local-map keymap)
(overlay-put overlay 'menu menu)
(while plist
(setq prop (car plist)
plist (cdr plist)
val (car plist)
plist (cdr plist))
(overlay-put overlay prop val))))
(defun eudc-bob-display-jpeg (data inline)
"Display the JPEG DATA at point.
If INLINE is non-nil, try to inline the image otherwise simply
display a button."
(cond ((fboundp 'make-glyph)
(let ((glyph (if (eudc-bob-can-display-inline-images)
(make-glyph (list (vector 'jpeg :data data)
[string :data "[JPEG Picture]"])))))
(eudc-bob-make-button "[JPEG Picture]"
eudc-bob-image-keymap
eudc-bob-image-menu
(list 'glyph glyph
'end-glyph (if inline glyph)
'duplicable t
'invisible inline
'start-open t
'end-open t
'object-data data))))
((fboundp 'create-image)
(let* ((image (create-image data nil t))
(props (list 'object-data data 'eudc-image image)))
(when (and inline (image-type-available-p 'jpeg))
(setq props (nconc (list 'display image) props)))
(eudc-bob-make-button "[Picture]"
eudc-bob-image-keymap
eudc-bob-image-menu
props)))))
(defun eudc-bob-toggle-inline-display ()
"Toggle inline display of an image."
(interactive)
(when (eudc-bob-can-display-inline-images)
(cond ((featurep 'xemacs)
(let ((overlays (append (overlays-at (1- (point)))
(overlays-at (point))))
overlay glyph)
(setq overlay (car overlays))
(while (and overlay
(not (setq glyph (overlay-get overlay 'glyph))))
(setq overlays (cdr overlays))
(setq overlay (car overlays)))
(if overlay
(if (overlay-get overlay 'end-glyph)
(progn
(overlay-put overlay 'end-glyph nil)
(overlay-put overlay 'invisible nil))
(overlay-put overlay 'end-glyph glyph)
(overlay-put overlay 'invisible t)))))
(t
(let* ((overlays (append (overlays-at (1- (point)))
(overlays-at (point))))
image)
;; Search overlay with an image.
(while (and overlays (null image))
(let ((prop (overlay-get (car overlays) 'eudc-image)))
(if (eq 'image (car-safe prop))
(setq image prop)
(setq overlays (cdr overlays)))))
;; Toggle that overlay's image display.
(when overlays
(let ((overlay (car overlays)))
(overlay-put overlay 'display
(if (overlay-get overlay 'display)
nil image)))))))))
(defun eudc-bob-display-audio (data)
"Display a button for audio DATA."
(eudc-bob-make-button "[Audio Sound]"
eudc-bob-sound-keymap
eudc-bob-sound-menu
(list 'duplicable t
'start-open t
'end-open t
'object-data data)))
(defun eudc-bob-display-generic-binary (data)
"Display a button for unidentified binary DATA."
(eudc-bob-make-button "[Binary Data]"
eudc-bob-generic-keymap
eudc-bob-generic-menu
(list 'duplicable t
'start-open t
'end-open t
'object-data data)))
(defun eudc-bob-play-sound-at-point ()
"Play the sound data contained in the button at point."
(interactive)
(let (sound)
(if (null (setq sound (eudc-bob-get-overlay-prop 'object-data)))
(error "No sound data available here")
(unless (fboundp 'play-sound)
(error "Playing sounds not supported on this system"))
(play-sound (list 'sound :data sound)))))
(defun eudc-bob-play-sound-at-mouse (event)
"Play the sound data contained in the button where EVENT occurred."
(interactive "e")
(save-excursion
(eudc-jump-to-event event)
(eudc-bob-play-sound-at-point)))
(defun eudc-bob-save-object ()
"Save the object data of the button at point."
(interactive)
(let ((data (eudc-bob-get-overlay-prop 'object-data))
(buffer (generate-new-buffer "*eudc-tmp*")))
(save-excursion
(if (fboundp 'set-buffer-file-coding-system)
(set-buffer-file-coding-system 'binary))
(set-buffer buffer)
(set-buffer-multibyte nil)
(insert data)
(save-buffer))
(kill-buffer buffer)))
(defun eudc-bob-pipe-object-to-external-program ()
"Pipe the object data of the button at point to an external program."
(interactive)
(let ((data (eudc-bob-get-overlay-prop 'object-data))
(buffer (generate-new-buffer "*eudc-tmp*"))
program
viewer)
(condition-case nil
(save-excursion
(if (fboundp 'set-buffer-file-coding-system)
(set-buffer-file-coding-system 'binary))
(set-buffer buffer)
(insert data)
(setq program (completing-read "Viewer: " eudc-external-viewers))
(if (setq viewer (assoc program eudc-external-viewers))
(call-process-region (point-min) (point-max)
(car (cdr viewer))
(cdr (cdr viewer)))
(call-process-region (point-min) (point-max) program)))
(error
(kill-buffer buffer)))))
(defun eudc-bob-menu ()
"Retrieve the menu attached to a binary object."
(eudc-bob-get-overlay-prop 'menu))
(defun eudc-bob-popup-menu (event)
"Pop-up a menu of EUDC multimedia commands."
(interactive "@e")
(run-hooks 'activate-menubar-hook)
(eudc-jump-to-event event)
(if (featurep 'xemacs)
(progn
(run-hooks 'activate-popup-menu-hook)
(popup-menu (eudc-bob-menu)))
(let ((result (x-popup-menu t (eudc-bob-menu)))
command)
(if result
(progn
(setq command (lookup-key (eudc-bob-menu)
(apply 'vector result)))
(command-execute command))))))
(setq eudc-bob-generic-keymap
(let ((map (make-sparse-keymap)))
(define-key map "s" 'eudc-bob-save-object)
(define-key map "!" 'eudc-bob-pipe-object-to-external-program)
(define-key map (if (featurep 'xemacs)
[button3]
[down-mouse-3]) 'eudc-bob-popup-menu)
map))
(setq eudc-bob-image-keymap
(let ((map (make-sparse-keymap)))
(define-key map "t" 'eudc-bob-toggle-inline-display)
map))
(setq eudc-bob-sound-keymap
(let ((map (make-sparse-keymap)))
(define-key map [return] 'eudc-bob-play-sound-at-point)
(define-key map (if (featurep 'xemacs)
[button2]
[down-mouse-2]) 'eudc-bob-play-sound-at-mouse)
map))
(setq eudc-bob-url-keymap
(let ((map (make-sparse-keymap)))
(define-key map [return] 'browse-url-at-point)
(define-key map (if (featurep 'xemacs)
[button2]
[down-mouse-2]) 'browse-url-at-mouse)
map))
(setq eudc-bob-mail-keymap
(let ((map (make-sparse-keymap)))
(define-key map [return] 'goto-address-at-point)
(define-key map (if (featurep 'xemacs)
[button2]
[down-mouse-2]) 'goto-address-at-mouse)
map))
(set-keymap-parent eudc-bob-image-keymap eudc-bob-generic-keymap)
(set-keymap-parent eudc-bob-sound-keymap eudc-bob-generic-keymap)
;; If the first arguments can be nil here, then these 3 can be
;; defconsts once more.
(when (not (featurep 'xemacs))
(easy-menu-define eudc-bob-generic-menu
eudc-bob-generic-keymap
""
eudc-bob-generic-menu)
(easy-menu-define eudc-bob-image-menu
eudc-bob-image-keymap
""
eudc-bob-image-menu)
(easy-menu-define eudc-bob-sound-menu
eudc-bob-sound-keymap
""
eudc-bob-sound-menu))
;;;###autoload
(defun eudc-display-generic-binary (data)
"Display a button for unidentified binary DATA."
(eudc-bob-display-generic-binary data))
;;;###autoload
(defun eudc-display-url (url)
"Display URL and make it clickable."
(require 'browse-url)
(eudc-bob-make-button url eudc-bob-url-keymap))
;;;###autoload
(defun eudc-display-mail (mail)
"Display e-mail address and make it clickable."
(require 'goto-addr)
(eudc-bob-make-button mail eudc-bob-mail-keymap))
;;;###autoload
(defun eudc-display-sound (data)
"Display a button to play the sound DATA."
(eudc-bob-display-audio data))
;;;###autoload
(defun eudc-display-jpeg-inline (data)
"Display the JPEG DATA inline at point if possible."
(eudc-bob-display-jpeg data (eudc-bob-can-display-inline-images)))
;;;###autoload
(defun eudc-display-jpeg-as-button (data)
"Display a button for the JPEG DATA."
(eudc-bob-display-jpeg data nil))
;; arch-tag: 8f1853df-c9b6-4c5a-bdb1-d94dbd651fb3
;;; eudc-bob.el ends here
|
