blob: 0a4c3de1cfc7f70fec6e17e7fa142dc54ed472b2 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
|
;;; mastodon-media.el --- Functions for inlining Mastodon media -*- lexical-binding: t -*-
;; Copyright (C) 2017 Johnson Denen
;; Author: Johnson Denen <johnson.denen@gmail.com>
;; Version: 0.7.0
;; Homepage: https://github.com/jdenen/mastodon.el
;; Package-Requires: ((emacs "24.4"))
;; This file is not part of GNU Emacs.
;; This file is part of mastodon.el.
;; mastodon.el 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.
;; mastodon.el 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 mastodon.el. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; mastodon-media.el provides functions for inlining media.
;; Known bug gnutls -12 when trying to access images on some systems.
;; It looks like their may be a version mismatch between the encryption
;; required by the server and client.
;;; Code:
(defgroup mastodon-media nil
"Inline Mastadon media."
:prefix "mastodon-media-"
:group 'mastodon)
(defcustom mastodon-media--avatar-height 30
"Height of the user avatar images (if shown)."
:group 'mastodon-media
:type 'integer)
(defcustom mastodon-media--preview-max-height 250
"Max height of any media attachment preview to be shown."
:group 'mastodon-media
:type 'integer)
(defvar mastodon-media--generic-avatar-data
(base64-decode-string
"iVBORw0KGgoAAAANSUhEUgAAAGQAAABkCAIAAAD/gAIDAAAACXBIWXMAAAsTAAALEwEAmpwYAAAA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")
"The PNG data for a generic 100x100 avatar")
(defvar mastodon-media--generic-broken-image-data
(base64-decode-string
"iVBORw0KGgoAAAANSUhEUgAAAMgAAADICAYAAACtWK6eAAAACXBIWXMAAAsTAAALEwEAmpwYAAAA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")
"The PNG data for a generic 200x200 'broken image' view")
(defun mastodon-media--process-image-response (status-plist marker image-options region-length)
"Callback function processing the url retrieve response for URL.
STATUS-PLIST is the usual plist of status events as per `url-retrieve'.
IMAGE-OPTIONS are the precomputed options to apply to the image.
MARKER is the marker to where the response should be visible.
REGION-LENGTH is the length of the region that should be replaced with the image.
"
(let ((url-buffer (current-buffer))
(is-error-response-p (eq :error (car status-plist))))
(unwind-protect
(let* ((data (unless is-error-response-p
(goto-char (point-min))
(search-forward "\n\n")
(buffer-substring (point) (point-max))))
(image (when data
(apply #'create-image data (when image-options 'imagemagick)
t image-options))))
(switch-to-buffer (marker-buffer marker))
;; Save narrowing in our buffer
(let ((inhibit-read-only t))
(save-restriction
(widen)
(put-text-property marker (+ marker region-length) 'media-state 'loaded)
(when image
;; We only set the image to display if we could load
;; it; we already have set a default image when we
;; added the tag.
(put-text-property marker (+ marker region-length)
'display image))
;; We are done with the marker; release it:
(set-marker marker nil)))
(kill-buffer url-buffer)))))
(defun mastodon-media--load-image-from-url (url media-type start region-length)
"Takes a URL and MEDIA-TYPE and load the image asynchronously.
MEDIA-TYPE is a symbol and either 'avatar or 'media-link."
;; TODO: Cache the avatars
(let ((image-options (when (image-type-available-p 'imagemagick)
(cond
((eq media-type 'avatar)
`(:height ,mastodon-media--avatar-height))
((eq media-type 'media-link)
`(:max-height ,mastodon-media--preview-max-height))))))
(url-retrieve url
#'mastodon-media--process-image-response
(list (copy-marker start) image-options region-length))))
(defun mastodon-media--select-next-media-line ()
"Find coordinates of the next media to load.
Returns the list of (`start' . `end', `media-symbol') points of
that line and string found or nil no more media links were
found."
(let ((next-pos (point)))
(while (and (setq next-pos (next-single-property-change next-pos 'media-state))
(or (not (eq 'needs-loading (get-text-property next-pos 'media-state)))
(null (get-text-property next-pos 'media-url))
(null (get-text-property next-pos 'media-type))))
;; do nothing - the loop will proceed
)
(when next-pos
(let ((media-type (get-text-property next-pos 'media-type)))
(cond
;; Avatars are just one character in the buffer
((eq media-type 'avatar)
(list next-pos (+ next-pos 1) 'avatar))
;; Media links are 5 character ("[img]")
((eq media-type 'media-link)
(list next-pos (+ next-pos 5) 'media-link)))))))
(defun mastodon-media--valid-link-p (link)
"Checks to make sure that the missing string has
not been returned."
(and link
(> (length link) 8)
(or (string= "http://" (substring link 0 7))
(string= "https://" (substring link 0 8)))))
(defun mastodon-media--inline-images ()
"Find all `Media_Links:' in the buffer replacing them with the referenced image."
(interactive)
(goto-char (point-min))
(let (line-details)
(while (setq line-details (mastodon-media--select-next-media-line))
(let* ((start (car line-details))
(end (cadr line-details))
(media-type (cadr (cdr line-details)))
(image-url (get-text-property start 'media-url)))
(if (not (mastodon-media--valid-link-p image-url))
;; mark it at least as not needing loading any more
(put-text-property start end 'media-state 'invalid-url)
;; proceed to load this image asynchronously
(put-text-property start end 'media-state 'loading)
(mastodon-media--load-image-from-url image-url media-type start (- end start)))))))
(defun mastodon-media--get-avatar-rendering (avatar-url)
"Returns the string to be written that renders the avatar at AVATAR-URL."
;; We use just an empty space as the textual representation.
;; This is what a user will see on a non-graphical display
;; where not showing an avatar at all is preferable.
(let ((image-options (when (image-type-available-p 'imagemagick)
`(:height ,mastodon-media--avatar-height))))
(concat
(propertize " "
'media-url avatar-url
'media-state 'needs-loading
'media-type 'avatar
'display (apply #'create-image mastodon-media--generic-avatar-data
(when image-options 'imagemagick)
t image-options))
" ")))
(defun mastodon-media--get-media-link-rendering (media-url)
"Returns the string to be written that renders the image at MEDIA-URL."
(concat
(propertize "[img]"
'media-url media-url
'media-state 'needs-loading
'media-type 'media-link
'display (create-image mastodon-media--generic-broken-image-data nil t))
" "))
(provide 'mastodon-media)
;;; mastodon-media.el ends here
|
