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 {
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constructor() {
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this.popup = new Popup();
this.popupTimer = null;
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this.mouseDownLeft = false;
this.mouseDownMiddle = false;
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this.textSourceLast = null;
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this.pendingLookup = false;
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this.options = null;
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}
async prepare() {
try {
this.options = await apiOptionsGet();
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window.addEventListener('message', this.onFrameMessage.bind(this));
window.addEventListener('mousedown', this.onMouseDown.bind(this));
window.addEventListener('mousemove', this.onMouseMove.bind(this));
window.addEventListener('mouseover', this.onMouseOver.bind(this));
window.addEventListener('mouseup', this.onMouseUp.bind(this));
window.addEventListener('resize', this.onResize.bind(this));
chrome.runtime.onMessage.addListener(this.onBgMessage.bind(this));
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} catch (e) {
this.onError(e);
}
}
onMouseOver(e) {
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if (e.target === this.popup.container && this.popupTimer) {
this.popupTimerClear();
}
}
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onMouseMove(e) {
this.popupTimerClear();
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if (!this.options.general.enable) {
return;
}
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if (this.mouseDownLeft) {
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return;
}
if (this.pendingLookup) {
return;
}
const mouseScan = this.mouseDownMiddle && this.options.scanning.middleMouse;
const keyScan =
this.options.scanning.modifier === 'alt' && e.altKey ||
this.options.scanning.modifier === 'ctrl' && e.ctrlKey ||
this.options.scanning.modifier === 'shift' && e.shiftKey ||
this.options.scanning.modifier === 'none';
if (!keyScan && !mouseScan) {
return;
}
const search = async () => {
try {
await this.searchAt({x: e.clientX, y: e.clientY});
} catch (e) {
this.onError(e);
}
};
if (this.options.scanning.modifier === 'none') {
this.popupTimerSet(search);
} else {
search();
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}
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}
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onMouseDown(e) {
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this.mousePosLast = {x: e.clientX, y: e.clientY};
this.popupTimerClear();
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this.searchClear();
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if (e.which === 1) {
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this.mouseDownLeft = true;
} else if (e.which === 2) {
this.mouseDownMiddle = true;
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}
}
onMouseUp(e) {
if (e.which === 1) {
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this.mouseDownLeft = false;
} else if (e.which === 2) {
this.mouseDownMiddle = false;
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}
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}
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onFrameMessage(e) {
const handlers = {
popupClose: () => {
this.searchClear();
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},
selectionCopy: () => {
document.execCommand('copy');
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}
};
const handler = handlers[e.data];
if (handler) {
handler();
}
}
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onResize() {
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this.searchClear();
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}
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onBgMessage({action, params}, sender, callback) {
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const handlers = {
optionsSet: options => {
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this.options = options;
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if (!this.options.enable) {
this.searchClear();
}
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}
};
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const handler = handlers[action];
if (handler) {
handler(params);
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}
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callback();
}
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onError(error) {
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window.alert(`Error: ${error.toString ? error.toString() : error}`);
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}
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popupTimerSet(callback) {
this.popupTimerClear();
this.popupTimer = window.setTimeout(callback, this.options.scanning.delay);
}
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popupTimerClear() {
if (this.popupTimer) {
window.clearTimeout(this.popupTimer);
this.popupTimer = null;
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}
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}
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async searchAt(point) {
if (this.pendingLookup || this.popup.containsPoint(point)) {
return;
}
const textSource = docRangeFromPoint(point);
let hideResults = !textSource || !textSource.containsPoint(point);
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try {
if (!hideResults && (!this.textSourceLast || !this.textSourceLast.equals(textSource))) {
this.pendingLookup = true;
hideResults = !await this.searchTerms(textSource) && !await this.searchKanji(textSource);
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}
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} catch (e) {
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if (window.yomichan_orphaned) {
if (textSource && this.options.scanning.modifier !== 'none') {
this.popup.showOrphaned(textSource.getRect(), this.options);
}
} else {
this.onError(e);
}
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} finally {
if (hideResults && this.options.scanning.autoHideResults) {
this.searchClear();
} else {
docImposterDestroy();
}
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this.pendingLookup = false;
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}
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}
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async searchTerms(textSource) {
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textSource.setEndOffset(this.options.scanning.length);
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const {definitions, length} = await apiTermsFind(textSource.text());
if (definitions.length === 0) {
return false;
}
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textSource.setEndOffset(length);
const sentence = docSentenceExtract(textSource, this.options.anki.sentenceExt);
const url = window.location.href;
this.popup.termsShow(
textSource.getRect(),
definitions,
this.options,
{sentence, url}
);
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this.textSourceLast = textSource;
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if (this.options.scanning.selectText) {
textSource.select();
}
return true;
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}
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async searchKanji(textSource) {
textSource.setEndOffset(1);
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const definitions = await apiKanjiFind(textSource.text());
if (definitions.length === 0) {
return false;
}
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const sentence = docSentenceExtract(textSource, this.options.anki.sentenceExt);
const url = window.location.href;
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this.popup.kanjiShow(
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textSource.getRect(),
definitions,
this.options,
{sentence, url}
);
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this.textSourceLast = textSource;
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if (this.options.scanning.selectText) {
textSource.select();
}
return true;
}
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searchClear() {
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docImposterDestroy();
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this.popup.hide();
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if (this.options.scanning.selectText && this.textSourceLast) {
this.textSourceLast.deselect();
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}
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this.textSourceLast = null;
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}
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}
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window.yomichan_frontend = new Frontend();
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window.yomichan_frontend.prepare();