yomichan/ext/fg/js/driver.js

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/*
* Copyright (C) 2016 Alex Yatskov <alex@foosoft.net>
* 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 Driver {
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constructor() {
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this.popup = new Popup();
this.popupTimer = null;
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this.lastMousePos = null;
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this.lastTextSource = null;
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this.pendingLookup = false;
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this.enabled = false;
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this.options = null;
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chrome.runtime.onMessage.addListener(this.onBgMessage.bind(this));
window.addEventListener('mouseover', this.onMouseOver.bind(this));
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window.addEventListener('mousedown', this.onMouseDown.bind(this));
window.addEventListener('mousemove', this.onMouseMove.bind(this));
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window.addEventListener('resize', e => this.searchClear());
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Promise.all([getOptions(), isEnabled()]).then(([options, enabled]) => {
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this.options = options;
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this.enabled = enabled;
}).catch(error => {
this.handleError(error);
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});
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}
popupTimerSet(callback) {
this.popupTimerClear();
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this.popupTimer = window.setTimeout(callback, this.options.scanning.delay);
}
popupTimerClear() {
if (this.popupTimer !== null) {
window.clearTimeout(this.popupTimer);
this.popupTimer = null;
}
}
onMouseOver(e) {
if (e.target === this.popup.container && this.popuptimer !== null) {
this.popupTimerClear();
}
}
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onMouseMove(e) {
this.lastMousePos = {x: e.clientX, y: e.clientY};
this.popupTimerClear();
if (!this.enabled) {
return;
}
if (e.which === 1 /* lmb */) {
return;
}
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if (this.options.scanning.requireShift && !e.shiftKey) {
return;
}
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const searcher = () => this.searchAt(this.lastMousePos);
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if (!this.popup.isVisible() || e.shiftKey || e.which === 2 /* mmb */) {
searcher();
} else {
this.popupTimerSet(searcher);
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}
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}
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onMouseDown(e) {
this.lastMousePos = {x: e.clientX, y: e.clientY};
this.popupTimerClear();
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this.searchClear();
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}
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onBgMessage({action, params}, sender, callback) {
const method = this['api_' + action];
if (typeof(method) === 'function') {
method.call(this, params);
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}
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callback();
}
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searchAt(point) {
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if (this.pendingLookup) {
return;
}
const textSource = textSourceFromPoint(point, this.options.scanning.imposter);
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if (textSource === null || !textSource.containsPoint(point)) {
return;
}
if (this.lastTextSource !== null && this.lastTextSource.equals(textSource)) {
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return;
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}
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this.pendingLookup = true;
this.searchTerms(textSource).then(found => {
if (!found) {
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return this.searchKanji(textSource);
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}
}).catch(error => {
this.handleError(error, textSource);
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}).then(() => {
this.pendingLookup = false;
});
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}
searchTerms(textSource) {
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textSource.setEndOffset(this.options.scanning.length);
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const findFunc = this.options.general.groupResults ? findTermsGrouped : findTerms;
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return findFunc(textSource.text()).then(({definitions, length}) => {
if (definitions.length === 0) {
return false;
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} else {
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textSource.setEndOffset(length);
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const sentence = extractSentence(textSource, this.options.anki.sentenceExt);
const url = window.location.href;
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this.popup.showNextTo(textSource.getRect());
this.popup.showTermDefs(definitions, this.options, {sentence, url});
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this.lastTextSource = textSource;
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if (this.options.scanning.selectText) {
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textSource.select();
}
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return true;
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}
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});
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}
searchKanji(textSource) {
textSource.setEndOffset(1);
return findKanji(textSource.text()).then(definitions => {
if (definitions.length === 0) {
return false;
} else {
const sentence = extractSentence(textSource, this.options.anki.sentenceExt);
const url = window.location.href;
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this.popup.showNextTo(textSource.getRect());
this.popup.showKanjiDefs(definitions, this.options, {sentence, url});
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this.lastTextSource = textSource;
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if (this.options.scanning.selectText) {
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textSource.select();
}
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return true;
}
});
}
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searchClear() {
destroyImposters();
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this.popup.hide();
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if (this.options.scanning.selectText && this.lastTextSource !== null) {
this.lastTextSource.deselect();
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}
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this.lastTextSource = null;
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}
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handleError(error, textSource) {
if (window.orphaned) {
if (textSource) {
this.popup.showNextTo(textSource.getRect());
this.popup.showOrphaned();
}
} else {
showError(error);
}
}
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api_setOptions(options) {
this.options = options;
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}
api_setEnabled(enabled) {
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if (!(this.enabled = enabled)) {
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this.searchClear();
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}
}
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}
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window.driver = new Driver();