yomichan/ext/fg/js/float.js

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/*
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* Copyright (C) 2016-2020 Alex Yatskov <alex@foosoft.net>
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* Author: Alex Yatskov <alex@foosoft.net>
*
* This program 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.
*
* This program 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
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
/*global popupNestedInitialize, apiForward, apiGetMessageToken, Display*/
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class DisplayFloat extends Display {
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constructor() {
super(document.querySelector('#spinner'), document.querySelector('#definitions'));
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this.autoPlayAudioTimer = null;
this.optionsContext = {
depth: 0,
url: window.location.href
};
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this._orphaned = false;
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this._prepareInvoked = false;
this._messageToken = null;
this._messageTokenPromise = null;
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this._onKeyDownHandlers = new Map([
['C', (e) => {
if (e.ctrlKey && !window.getSelection().toString()) {
this.onSelectionCopy();
return true;
}
return false;
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}],
...this._onKeyDownHandlers
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]);
this._windowMessageHandlers = new Map([
['setContent', ({type, details}) => this.setContent(type, details)],
['clearAutoPlayTimer', () => this.clearAutoPlayTimer()],
['setCustomCss', ({css}) => this.setCustomCss(css)],
['prepare', ({options, popupInfo, url, childrenSupported, scale, uniqueId}) => this.prepare(options, popupInfo, url, childrenSupported, scale, uniqueId)],
['setContentScale', ({scale}) => this.setContentScale(scale)]
]);
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yomichan.on('orphaned', this.onOrphaned.bind(this));
window.addEventListener('message', this.onMessage.bind(this), false);
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}
async prepare(options, popupInfo, url, childrenSupported, scale, uniqueId) {
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if (this._prepareInvoked) { return; }
this._prepareInvoked = true;
await super.prepare(options);
const {id, depth, parentFrameId} = popupInfo;
this.optionsContext.depth = depth;
this.optionsContext.url = url;
if (childrenSupported) {
popupNestedInitialize(id, depth, parentFrameId, url);
}
this.setContentScale(scale);
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apiForward('popupPrepareCompleted', {uniqueId});
}
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onError(error) {
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if (this._orphaned) {
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this.setContent('orphaned');
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} else {
logError(error, true);
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}
}
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onOrphaned() {
this._orphaned = true;
}
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onSearchClear() {
window.parent.postMessage('popupClose', '*');
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}
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onSelectionCopy() {
window.parent.postMessage('selectionCopy', '*');
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}
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onMessage(e) {
const data = e.data;
if (typeof data !== 'object' || data === null) { return; } // Invalid data
const token = data.token;
if (typeof token !== 'string') { return; } // Invalid data
if (this._messageToken === null) {
// Async
this.getMessageToken()
.then(
() => { this.handleAction(token, data); },
() => {}
);
} else {
// Sync
this.handleAction(token, data);
}
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}
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async getMessageToken() {
// this._messageTokenPromise is used to ensure that only one call to apiGetMessageToken is made.
if (this._messageTokenPromise === null) {
this._messageTokenPromise = apiGetMessageToken();
}
const messageToken = await this._messageTokenPromise;
if (this._messageToken === null) {
this._messageToken = messageToken;
}
this._messageTokenPromise = null;
}
handleAction(token, {action, params}) {
if (token !== this._messageToken) {
// Invalid token
return;
}
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const handler = this._windowMessageHandlers.get(action);
if (typeof handler !== 'function') { return; }
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handler(params);
}
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getOptionsContext() {
return this.optionsContext;
}
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autoPlayAudio() {
this.clearAutoPlayTimer();
this.autoPlayAudioTimer = window.setTimeout(() => super.autoPlayAudio(), 400);
}
clearAutoPlayTimer() {
if (this.autoPlayAudioTimer) {
window.clearTimeout(this.autoPlayAudioTimer);
this.autoPlayAudioTimer = null;
}
}
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setContentScale(scale) {
document.body.style.fontSize = `${scale}em`;
}
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}
DisplayFloat.instance = new DisplayFloat();