yomichan/ext/fg/js/client.js

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JavaScript
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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/>.
*/
class Client {
constructor() {
this.popup = new Popup();
this.audio = {};
this.lastMousePos = null;
this.lastTextSource = null;
this.activateKey = 16;
this.activateBtn = 2;
this.enabled = false;
this.options = {};
this.definitions = null;
this.sequence = 0;
this.fgRoot = chrome.extension.getURL('fg');
chrome.runtime.onMessage.addListener(this.onBgMessage.bind(this));
window.addEventListener('message', this.onFrameMessage.bind(this));
window.addEventListener('mousedown', this.onMouseDown.bind(this));
window.addEventListener('mousemove', this.onMouseMove.bind(this));
window.addEventListener('keydown', this.onKeyDown.bind(this));
window.addEventListener('scroll', (e) => this.hidePopup());
window.addEventListener('resize', (e) => this.hidePopup());
}
onKeyDown(e) {
if (this.enabled && this.lastMousePos !== null && (e.keyCode === this.activateKey || e.charCode === this.activateKey)) {
this.searchAt(this.lastMousePos);
}
}
onMouseMove(e) {
this.lastMousePos = {x: e.clientX, y: e.clientY};
if (this.enabled && (e.shiftKey || e.which === this.activateBtn)) {
this.searchAt(this.lastMousePos);
}
}
onMouseDown(e) {
this.lastMousePos = {x: e.clientX, y: e.clientY};
if (this.enabled && (e.shiftKey || e.which === this.activateBtn)) {
this.searchAt(this.lastMousePos);
} else {
this.hidePopup();
}
}
onBgMessage({action, params}, sender, callback) {
const method = this['api_' + action];
if (typeof(method) === 'function') {
method.call(this, params);
}
callback();
}
onFrameMessage(e) {
const {action, params} = e.data, method = this['api_' + action];
if (typeof(method) === 'function') {
method.call(this, params);
}
}
searchAt(point) {
const textSource = Client.textSourceFromPoint(point);
if (textSource === null || !textSource.containsPoint(point)) {
this.hidePopup();
return;
}
if (this.lastTextSource !== null && this.lastTextSource.equals(textSource)) {
return;
}
textSource.setEndOffset(this.options.scanLength);
let defs = [];
let seq = -1;
bgFindTerm(textSource.text())
.then(({definitions, length}) => {
if (length === 0) {
return Promise.reject();
}
textSource.setEndOffset(length);
const sentence = Client.extractSentence(textSource, this.options.sentenceExtent);
definitions.forEach((definition) => {
definition.url = window.location.href;
definition.sentence = sentence;
});
defs = definitions;
seq = ++this.sequence;
return bgRenderText({definitions, root: this.fgRoot, options: this.options, sequence: seq}, 'term-list.html');
})
.then((content) => {
this.definitions = defs;
this.showPopup(textSource, content);
return bgCanAddDefinitions(defs, ['term_kanji', 'term_kana']);
})
.then((states) => {
if (states !== null) {
states.forEach((state, index) => this.popup.sendMessage('setActionState', {index, state, sequence: seq}));
}
}, () => this.hidePopup());
}
showPopup(textSource, content) {
this.popup.showNextTo(textSource.getRect(), content);
if (this.options.selectMatchedText) {
textSource.select();
}
this.lastTextSource = textSource;
}
hidePopup() {
this.popup.hide();
if (this.options.selectMatchedText && this.lastTextSource !== null) {
this.lastTextSource.deselect();
}
this.lastTextSource = null;
this.definitions = null;
}
api_setOptions(opts) {
this.options = opts;
}
api_setEnabled(enabled) {
if (!(this.enabled = enabled)) {
this.hidePopup();
}
}
api_addNote({index, mode}) {
const state = {};
state[mode] = false;
bgAddDefinition(this.definitions[index], mode).then((success) => {
if (success) {
this.popup.sendMessage('setActionState', {index, state, sequence: this.sequence});
} else {
alert('Note could not be added');
}
});
}
api_playAudio(index) {
const definition = this.definitions[index];
let url = `https://assets.languagepod101.com/dictionary/japanese/audiomp3.php?kanji=${encodeURIComponent(definition.expression)}`;
if (definition.reading) {
url += `&kana=${encodeURIComponent(definition.reading)}`;
}
for (const key in this.audio) {
this.audio[key].pause();
}
const audio = this.audio[url] || new Audio(url);
audio.currentTime = 0;
audio.play();
this.audio[url] = audio;
}
api_displayKanji(kanji) {
let defs = [];
let seq = -1;
bgFindKanji(kanji)
.then((definitions) => {
definitions.forEach((definition) => definition.url = window.location.href);
defs = definitions;
seq = ++this.sequence;
return bgRenderText({definitions, root: this.fgRoot, options: this.options, sequence: seq}, 'kanji-list.html');
})
.then((content) => {
this.definitions = defs;
this.popup.setContent(content, defs);
return bgCanAddDefinitions(defs, ['kanji']);
})
.then((states) => {
if (states !== null) {
states.forEach((state, index) => this.popup.sendMessage('setActionState', {index, state, sequence: seq}));
}
});
}
static textSourceFromPoint(point) {
const element = document.elementFromPoint(point.x, point.y);
if (element !== null) {
const names = ['IMG', 'INPUT', 'BUTTON', 'TEXTAREA'];
if (names.indexOf(element.nodeName) !== -1) {
return new TextSourceElement(element);
}
}
const range = document.caretRangeFromPoint(point.x, point.y);
if (range !== null) {
return new TextSourceRange(range);
}
return null;
}
static extractSentence(source, extent) {
const quotesFwd = {'「': '」', '『': '』', "'": "'", '"': '"'};
const quotesBwd = {'」': '「', '』': '『', "'": "'", '"': '"'};
const terminators = '…。..?!';
const sourceLocal = source.clone();
const position = sourceLocal.setStartOffset(extent);
sourceLocal.setEndOffset(position + extent);
const content = sourceLocal.text();
let quoteStack = [];
let startPos = 0;
for (let i = position; i >= startPos; --i) {
const c = content[i];
if (quoteStack.length === 0 && (terminators.indexOf(c) !== -1 || c in quotesFwd)) {
startPos = i + 1;
break;
}
if (quoteStack.length > 0 && c === quoteStack[0]) {
quoteStack.pop();
} else if (c in quotesBwd) {
quoteStack = [quotesBwd[c]].concat(quoteStack);
}
}
quoteStack = [];
let endPos = content.length;
for (let i = position; i < endPos; ++i) {
const c = content[i];
if (quoteStack.length === 0) {
if (terminators.indexOf(c) !== -1) {
endPos = i + 1;
break;
}
else if (c in quotesBwd) {
endPos = i;
break;
}
}
if (quoteStack.length > 0 && c === quoteStack[0]) {
quoteStack.pop();
} else if (c in quotesFwd) {
quoteStack = [quotesFwd[c]].concat(quoteStack);
}
}
return content.substring(startPos, endPos).trim();
}
}
window.yomiClient = new Client();