yomichan/ext/fg/js/frontend.js

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/*
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* Copyright (C) 2016-2017 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
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
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class Frontend {
constructor(popup, ignoreNodes) {
this.popup = popup;
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this.textScanner = new TextScanner(
window,
ignoreNodes,
[this.popup.container],
[(x, y) => this.popup.containsPoint(x, y)]
);
this.textScanner.subscribe('textSearch', ({textSource, cause}) => this.searchSource(textSource, cause));
this.textScanner.subscribe('searchClear', () => this.searchClear(true));
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this.options = null;
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this.optionsContext = {
depth: popup.depth,
url: popup.url
};
this.enabled = false;
this.eventListeners = [];
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this.isPreparedPromiseResolve = null;
this.isPreparedPromise = new Promise((resolve) => { this.isPreparedPromiseResolve = resolve; });
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this.lastShowPromise = Promise.resolve();
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}
static create() {
const data = window.frontendInitializationData || {};
const {id, depth=0, parentFrameId, ignoreNodes, url, proxy=false} = data;
const popup = proxy ? new PopupProxy(depth + 1, id, parentFrameId, url) : PopupProxyHost.instance.createPopup(null, depth);
const frontend = new Frontend(popup, ignoreNodes);
frontend.prepare();
return frontend;
}
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async prepare() {
try {
await this.updateOptions();
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chrome.runtime.onMessage.addListener(this.onRuntimeMessage.bind(this));
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this.isPreparedPromiseResolve();
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} catch (e) {
this.onError(e);
}
}
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isPrepared() {
return this.isPreparedPromise;
}
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async onResize() {
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const textSource = this.textScanner.getCurrentTextSource();
if (textSource !== null && await this.popup.isVisibleAsync()) {
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this.lastShowPromise = this.popup.showContent(
textSource.getRect(),
textSource.getWritingMode()
);
}
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}
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onWindowMessage(e) {
const action = e.data;
const handlers = Frontend.windowMessageHandlers;
if (hasOwn(handlers, action)) {
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const handler = handlers[action];
handler(this);
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}
}
onRuntimeMessage({action, params}, sender, callback) {
const handlers = Frontend.runtimeMessageHandlers;
if (hasOwn(handlers, action)) {
const handler = handlers[action];
const result = handler(this, params);
callback(result);
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}
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}
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onError(error) {
logError(error, false);
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}
setEnabled(enabled) {
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this.textScanner.setEnabled(enabled);
if (enabled) {
if (!this.enabled) {
this.hookEvents();
this.enabled = true;
}
} else {
if (this.enabled) {
this.clearEventListeners();
this.enabled = false;
}
this.searchClear(false);
}
}
hookEvents() {
this.addEventListener(window, 'message', this.onWindowMessage.bind(this));
this.addEventListener(window, 'resize', this.onResize.bind(this));
}
addEventListener(node, type, listener, options) {
node.addEventListener(type, listener, options);
this.eventListeners.push([node, type, listener, options]);
}
clearEventListeners() {
for (const [node, type, listener, options] of this.eventListeners) {
node.removeEventListener(type, listener, options);
}
this.eventListeners = [];
}
async updateOptions() {
this.options = await apiOptionsGet(this.getOptionsContext());
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this.textScanner.setOptions(this.options);
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await this.popup.setOptions(this.options);
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this.setEnabled(this.options.general.enable);
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}
async searchSource(textSource, cause) {
let results = null;
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try {
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if (textSource !== null) {
results = (
await this.findTerms(textSource) ||
await this.findKanji(textSource)
);
if (results !== null) {
const focus = (cause === 'mouse');
this.showContent(textSource, focus, results.definitions, results.type);
}
}
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} catch (e) {
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if (window.yomichan_orphaned) {
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if (textSource !== null && this.options.scanning.modifier !== 'none') {
this.lastShowPromise = this.popup.showContent(
textSource.getRect(),
textSource.getWritingMode(),
'orphaned'
);
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}
} else {
this.onError(e);
}
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} finally {
if (results === null && this.options.scanning.autoHideResults) {
this.searchClear(true);
}
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}
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return results;
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}
showContent(textSource, focus, definitions, type) {
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const sentence = docSentenceExtract(textSource, this.options.anki.sentenceExt);
const url = window.location.href;
this.lastShowPromise = this.popup.showContent(
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textSource.getRect(),
textSource.getWritingMode(),
type,
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{definitions, context: {sentence, url, focus, disableHistory: true}}
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);
if (this.options.scanning.selectText) {
textSource.select();
}
}
async findTerms(textSource) {
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this.textScanner.setTextSourceScanLength(textSource, this.options.scanning.length);
const searchText = textSource.text();
if (searchText.length === 0) { return null; }
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const {definitions, length} = await apiTermsFind(searchText, {}, this.getOptionsContext());
if (definitions.length === 0) { return null; }
textSource.setEndOffset(length);
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return {definitions, type: 'terms'};
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}
async findKanji(textSource) {
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this.textScanner.setTextSourceScanLength(textSource, 1);
const searchText = textSource.text();
if (searchText.length === 0) { return null; }
const definitions = await apiKanjiFind(searchText, this.getOptionsContext());
if (definitions.length === 0) { return null; }
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return {definitions, type: 'kanji'};
}
searchClear(changeFocus) {
this.popup.hide(changeFocus);
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this.popup.clearAutoPlayTimer();
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this.textScanner.searchClear();
}
getOptionsContext() {
this.optionsContext.url = this.popup.url;
return this.optionsContext;
}
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}
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Frontend.windowMessageHandlers = {
popupClose: (self) => {
self.searchClear(true);
},
selectionCopy: () => {
document.execCommand('copy');
}
};
Frontend.runtimeMessageHandlers = {
optionsUpdate: (self) => {
self.updateOptions();
},
popupSetVisibleOverride: (self, {visible}) => {
self.popup.setVisibleOverride(visible);
},
getUrl: () => {
return {url: window.location.href};
}
};