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
|
// ==========================================================================
// Plyr Captions
// TODO: Create as class
// ==========================================================================
import controls from './controls';
import i18n from './i18n';
import support from './support';
import utils from './utils';
const captions = {
// Setup captions
setup() {
// Requires UI support
if (!this.supported.ui) {
return;
}
// Only Vimeo and HTML5 video supported at this point
if (!this.isVideo || this.isYouTube || (this.isHTML5 && !support.textTracks)) {
// Clear menu and hide
if (utils.is.array(this.config.controls) && this.config.controls.includes('settings') && this.config.settings.includes('captions')) {
controls.setCaptionsMenu.call(this);
}
return;
}
// Inject the container
if (!utils.is.element(this.elements.captions)) {
this.elements.captions = utils.createElement('div', utils.getAttributesFromSelector(this.config.selectors.captions));
utils.insertAfter(this.elements.captions, this.elements.wrapper);
}
// Get browser info
const browser = utils.getBrowser();
// Fix IE captions if CORS is used
// Fetch captions and inject as blobs instead (data URIs not supported!)
if (browser.isIE && window.URL) {
const elements = this.media.querySelectorAll('track');
Array.from(elements).forEach(track => {
const src = track.getAttribute('src');
const href = utils.parseUrl(src);
if (href.hostname !== window.location.href.hostname && [
'http:',
'https:',
].includes(href.protocol)) {
utils
.fetch(src, 'blob')
.then(blob => {
track.setAttribute('src', window.URL.createObjectURL(blob));
})
.catch(() => {
utils.removeElement(track);
});
}
});
}
// Try to load the value from storage
let active = this.storage.get('captions');
// Otherwise fall back to the default config
if (!utils.is.boolean(active)) {
({ active } = this.config.captions);
}
// Set toggled state
this.toggleCaptions(active);
// Watch changes to textTracks and update captions menu
if (this.config.captions.update) {
utils.on(this.media.textTracks, 'addtrack removetrack', captions.update.bind(this));
}
// Update available languages in list next tick (the event must not be triggered before the listeners)
setTimeout(captions.update.bind(this), 0);
},
update() {
// Update tracks
const tracks = captions.getTracks.call(this);
this.options.captions = tracks.map(({language}) => language);
// Set language if it hasn't been set already
if (!this.language) {
let { language } = this.config.captions;
if (language === 'auto') {
[ language ] = (navigator.language || navigator.userLanguage).split('-');
}
this.language = this.storage.get('language') || (language || '').toLowerCase();
}
// Toggle the class hooks
utils.toggleClass(this.elements.container, this.config.classNames.captions.enabled, !utils.is.empty(captions.getTracks.call(this)));
// Update available languages in list
if ((this.config.controls || []).includes('settings') && this.config.settings.includes('captions')) {
controls.setCaptionsMenu.call(this);
}
},
// Set the captions language
setLanguage() {
// Setup HTML5 track rendering
if (this.isHTML5 && this.isVideo) {
captions.getTracks.call(this).forEach(track => {
// Show track
utils.on(track, 'cuechange', () => captions.updateCues.call(this));
// Turn off native caption rendering to avoid double captions
// eslint-disable-next-line
track.mode = 'hidden';
});
// If we change the active track while a cue is already displayed we need to update it
captions.updateCues.call(this);
} else if (this.isVimeo && this.captions.active) {
this.embed.enableTextTrack(this.language);
}
},
// Get the tracks
getTracks() {
// Return empty array at least
if (utils.is.nullOrUndefined(this.media)) {
return [];
}
// Only get accepted kinds
return Array.from(this.media.textTracks || []).filter(track => [
'captions',
'subtitles',
].includes(track.kind));
},
// Get the current track for the current language
getCurrentTrack() {
const tracks = captions.getTracks.call(this);
if (!tracks.length) {
return null;
}
// Get track based on current language
let track = tracks.find(track => track.language.toLowerCase() === this.language);
// Get the <track> with default attribute
if (!track) {
track = utils.getElement.call(this, 'track[default]');
}
// Get the first track
if (!track) {
[track] = tracks;
}
return track;
},
// Get UI label for track
getLabel(track) {
let currentTrack = track;
if (!utils.is.track(currentTrack) && support.textTracks && this.captions.active) {
currentTrack = captions.getCurrentTrack.call(this);
}
if (utils.is.track(currentTrack)) {
if (!utils.is.empty(currentTrack.label)) {
return currentTrack.label;
}
if (!utils.is.empty(currentTrack.language)) {
return track.language.toUpperCase();
}
return i18n.get('enabled', this.config);
}
return i18n.get('disabled', this.config);
},
// Update captions using current track's active cues
// Also optional array argument in case there isn't any track (ex: vimeo)
updateCues(input) {
// Requires UI
if (!this.supported.ui) {
return;
}
if (!utils.is.element(this.elements.captions)) {
this.debug.warn('No captions element to render to');
return;
}
// Only accept array or empty input
if (!utils.is.nullOrUndefined(input) && !Array.isArray(input)) {
this.debug.warn('updateCues: Invalid input', input);
return;
}
let cues = input;
// Get cues from track
if (!cues) {
const track = captions.getCurrentTrack.call(this);
cues = Array.from((track || {}).activeCues || [])
.map(cue => cue.getCueAsHTML())
.map(utils.getHTML);
}
// Set new caption text
const content = cues.map(cueText => cueText.trim()).join('\n');
const changed = content !== this.elements.captions.innerHTML;
if (changed) {
// Empty the container and create a new child element
utils.emptyElement(this.elements.captions);
const caption = utils.createElement('span', utils.getAttributesFromSelector(this.config.selectors.caption));
caption.innerHTML = content;
this.elements.captions.appendChild(caption);
// Trigger event
utils.dispatchEvent.call(this, this.media, 'cuechange');
}
},
};
export default captions;
|
