yomichan/ext/mixed/js/display.js

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JavaScript
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/*
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* Copyright (C) 2017-2020 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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*/
class Display {
constructor(spinner, container) {
this.spinner = spinner;
this.container = container;
this.definitions = [];
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this.options = null;
this.context = null;
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this.sequence = 0;
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this.index = 0;
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this.audioPlaying = null;
this.audioFallback = null;
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this.audioCache = {};
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this.styleNode = null;
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this.eventListeners = [];
this.persistentEventListeners = [];
this.interactive = false;
this.eventListenersActive = false;
this.clickScanPrevent = false;
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this.windowScroll = new WindowScroll();
this.setInteractive(true);
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}
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onError(_error) {
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throw new Error('Override me');
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}
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onSearchClear() {
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throw new Error('Override me');
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}
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onSourceTermView(e) {
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e.preventDefault();
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this.sourceTermView();
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}
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onNextTermView(e) {
e.preventDefault();
this.nextTermView();
}
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async onKanjiLookup(e) {
try {
e.preventDefault();
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if (!this.context) { return; }
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const link = e.target;
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this.context.update({
index: this.entryIndexFind(link),
scroll: this.windowScroll.y
});
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const context = {
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sentence: this.context.get('sentence'),
url: this.context.get('url')
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};
const definitions = await apiKanjiFind(link.textContent, this.getOptionsContext());
this.setContentKanji(definitions, context);
} catch (error) {
this.onError(error);
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}
}
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onGlossaryMouseDown(e) {
if (DOM.isMouseButtonPressed(e, 'primary')) {
this.clickScanPrevent = false;
}
}
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onGlossaryMouseMove() {
this.clickScanPrevent = true;
}
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onGlossaryMouseUp(e) {
if (!this.clickScanPrevent && DOM.isMouseButtonPressed(e, 'primary')) {
this.onTermLookup(e);
}
}
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async onTermLookup(e, {disableScroll, selectText, disableHistory}={}) {
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try {
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if (!this.context) { return; }
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const termLookupResults = await this.termLookup(e);
if (!termLookupResults) { return; }
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const {textSource, definitions} = termLookupResults;
const scannedElement = e.target;
const sentence = docSentenceExtract(textSource, this.options.anki.sentenceExt);
this.context.update({
index: this.entryIndexFind(scannedElement),
scroll: this.windowScroll.y
});
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const context = {
disableScroll,
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disableHistory,
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sentence,
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url: this.context.get('url')
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};
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if (disableHistory) {
Object.assign(context, {
previous: this.context.previous,
next: this.context.next
});
} else {
Object.assign(context, {
previous: this.context
});
}
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this.setContentTerms(definitions, context);
if (selectText) {
textSource.select();
}
} catch (error) {
this.onError(error);
}
}
async termLookup(e) {
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try {
e.preventDefault();
const textSource = docRangeFromPoint(e.clientX, e.clientY, this.options.scanning.deepDomScan);
if (textSource === null) {
return false;
}
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let definitions, length;
try {
textSource.setEndOffset(this.options.scanning.length);
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({definitions, length} = await apiTermsFind(textSource.text(), {}, this.getOptionsContext()));
if (definitions.length === 0) {
return false;
}
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textSource.setEndOffset(length);
} finally {
textSource.cleanup();
}
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return {textSource, definitions};
} catch (error) {
this.onError(error);
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}
}
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onAudioPlay(e) {
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e.preventDefault();
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const link = e.currentTarget;
const entry = link.closest('.entry');
const definitionIndex = this.entryIndexFind(entry);
const expressionIndex = Display.indexOf(entry.querySelectorAll('.expression .action-play-audio'), link);
this.audioPlay(this.definitions[definitionIndex], expressionIndex, definitionIndex);
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}
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onNoteAdd(e) {
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e.preventDefault();
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const link = e.currentTarget;
const index = this.entryIndexFind(link);
this.noteAdd(this.definitions[index], link.dataset.mode);
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}
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onNoteView(e) {
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e.preventDefault();
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const link = e.currentTarget;
apiNoteView(link.dataset.noteId);
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}
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onKeyDown(e) {
const key = Display.getKeyFromEvent(e);
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const handler = Display._onKeyDownHandlers.get(key);
if (typeof handler === 'function') {
if (handler(this, e)) {
e.preventDefault();
return true;
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}
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}
return false;
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}
onWheel(e) {
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if (e.altKey) {
if (e.deltaY !== 0) {
this.entryScrollIntoView(this.index + (e.deltaY > 0 ? 1 : -1), null, true);
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e.preventDefault();
}
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} else if (e.shiftKey) {
this.onHistoryWheel(e);
}
}
onHistoryWheel(e) {
const delta = -e.deltaX || e.deltaY;
if (delta > 0) {
this.sourceTermView();
e.preventDefault();
} else if (delta < 0) {
this.nextTermView();
e.preventDefault();
}
}
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getOptionsContext() {
throw new Error('Override me');
}
isInitialized() {
return this.options !== null;
}
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async initialize(options=null) {
await this.updateOptions(options);
yomichan.on('optionsUpdate', () => this.updateOptions(null));
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}
async updateOptions(options) {
this.options = options ? options : await apiOptionsGet(this.getOptionsContext());
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this.updateTheme(this.options.general.popupTheme);
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this.setCustomCss(this.options.general.customPopupCss);
audioPrepareTextToSpeech(this.options);
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}
updateTheme(themeName) {
document.documentElement.dataset.yomichanTheme = themeName;
const stylesheets = document.querySelectorAll('link[data-yomichan-theme-name]');
for (const stylesheet of stylesheets) {
const match = (stylesheet.dataset.yomichanThemeName === themeName);
stylesheet.rel = (match ? 'stylesheet' : 'stylesheet alternate');
}
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}
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setCustomCss(css) {
if (this.styleNode === null) {
if (css.length === 0) { return; }
this.styleNode = document.createElement('style');
}
this.styleNode.textContent = css;
const parent = document.head;
if (this.styleNode.parentNode !== parent) {
parent.appendChild(this.styleNode);
}
}
setInteractive(interactive) {
interactive = !!interactive;
if (this.interactive === interactive) { return; }
this.interactive = interactive;
if (interactive) {
Display.addEventListener(this.persistentEventListeners, document, 'keydown', this.onKeyDown.bind(this), false);
Display.addEventListener(this.persistentEventListeners, document, 'wheel', this.onWheel.bind(this), {passive: false});
} else {
Display.clearEventListeners(this.persistentEventListeners);
}
this.setEventListenersActive(this.eventListenersActive);
}
setEventListenersActive(active) {
active = !!active && this.interactive;
if (this.eventListenersActive === active) { return; }
this.eventListenersActive = active;
if (active) {
this.addEventListeners('.action-add-note', 'click', this.onNoteAdd.bind(this));
this.addEventListeners('.action-view-note', 'click', this.onNoteView.bind(this));
this.addEventListeners('.action-play-audio', 'click', this.onAudioPlay.bind(this));
this.addEventListeners('.kanji-link', 'click', this.onKanjiLookup.bind(this));
this.addEventListeners('.source-term', 'click', this.onSourceTermView.bind(this));
this.addEventListeners('.next-term', 'click', this.onNextTermView.bind(this));
this.addEventListeners('.term-navigation', 'wheel', this.onHistoryWheel.bind(this), {passive: false});
if (this.options.scanning.enablePopupSearch) {
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this.addEventListeners('.glossary-item', 'mouseup', this.onGlossaryMouseUp.bind(this));
this.addEventListeners('.glossary-item', 'mousedown', this.onGlossaryMouseDown.bind(this));
this.addEventListeners('.glossary-item', 'mousemove', this.onGlossaryMouseMove.bind(this));
}
} else {
Display.clearEventListeners(this.eventListeners);
}
}
addEventListeners(selector, type, listener, options) {
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for (const node of this.container.querySelectorAll(selector)) {
Display.addEventListener(this.eventListeners, node, type, listener, options);
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}
}
setContent(type, details) {
switch (type) {
case 'terms':
return this.setContentTerms(details.definitions, details.context);
case 'kanji':
return this.setContentKanji(details.definitions, details.context);
case 'orphaned':
return this.setContentOrphaned();
default:
return Promise.resolve();
}
}
async setContentTerms(definitions, context) {
if (!context) { throw new Error('Context expected'); }
if (!this.isInitialized()) { return; }
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try {
const options = this.options;
this.setEventListenersActive(false);
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if (context.focus !== false) {
window.focus();
}
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this.definitions = definitions;
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if (context.disableHistory) {
delete context.disableHistory;
this.context = new DisplayContext('terms', definitions, context);
} else {
this.context = DisplayContext.push(this.context, 'terms', definitions, context);
}
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const sequence = ++this.sequence;
const params = {
definitions,
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source: !!this.context.previous,
next: !!this.context.next,
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addable: options.anki.enable,
grouped: options.general.resultOutputMode === 'group',
merged: options.general.resultOutputMode === 'merge',
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playback: options.audio.enabled,
compactGlossaries: options.general.compactGlossaries,
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debug: options.general.debugInfo
};
for (const definition of definitions) {
definition.cloze = Display.clozeBuild(context.sentence, definition.source);
definition.url = context.url;
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}
const content = await apiTemplateRender('terms.html', params);
this.container.innerHTML = content;
const {index, scroll, disableScroll} = context;
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if (!disableScroll) {
this.entryScrollIntoView(index || 0, scroll);
} else {
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delete context.disableScroll;
this.entrySetCurrent(index || 0);
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}
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if (options.audio.enabled && options.audio.autoPlay) {
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this.autoPlayAudio();
}
this.setEventListenersActive(true);
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await this.adderButtonUpdate(['term-kanji', 'term-kana'], sequence);
} catch (e) {
this.onError(e);
}
}
async setContentKanji(definitions, context) {
if (!context) { throw new Error('Context expected'); }
if (!this.isInitialized()) { return; }
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try {
const options = this.options;
this.setEventListenersActive(false);
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if (context.focus !== false) {
window.focus();
}
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this.definitions = definitions;
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if (context.disableHistory) {
delete context.disableHistory;
this.context = new DisplayContext('kanji', definitions, context);
} else {
this.context = DisplayContext.push(this.context, 'kanji', definitions, context);
}
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const sequence = ++this.sequence;
const params = {
definitions,
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source: !!this.context.previous,
next: !!this.context.next,
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addable: options.anki.enable,
debug: options.general.debugInfo
};
for (const definition of definitions) {
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definition.cloze = Display.clozeBuild(context.sentence, definition.character);
definition.url = context.url;
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}
const content = await apiTemplateRender('kanji.html', params);
this.container.innerHTML = content;
const {index, scroll} = context;
this.entryScrollIntoView(index || 0, scroll);
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this.setEventListenersActive(true);
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await this.adderButtonUpdate(['kanji'], sequence);
} catch (e) {
this.onError(e);
}
}
async setContentOrphaned() {
const definitions = document.querySelector('#definitions');
const errorOrphaned = document.querySelector('#error-orphaned');
if (definitions !== null) {
definitions.style.setProperty('display', 'none', 'important');
}
if (errorOrphaned !== null) {
errorOrphaned.style.setProperty('display', 'block', 'important');
}
}
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autoPlayAudio() {
this.audioPlay(this.definitions[0], this.firstExpressionIndex, 0);
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}
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async adderButtonUpdate(modes, sequence) {
try {
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const states = await apiDefinitionsAddable(this.definitions, modes, this.getOptionsContext());
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if (!states || sequence !== this.sequence) {
return;
}
for (let i = 0; i < states.length; ++i) {
const state = states[i];
let noteId = null;
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for (const mode in state) {
const button = this.adderButtonFind(i, mode);
if (button === null) {
continue;
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}
const info = state[mode];
if (!info.canAdd && noteId === null && info.noteId) {
noteId = info.noteId;
}
button.classList.toggle('disabled', !info.canAdd);
button.classList.remove('pending');
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}
if (noteId !== null) {
this.viewerButtonShow(i, noteId);
}
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}
} catch (e) {
this.onError(e);
}
}
entrySetCurrent(index) {
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index = Math.min(index, this.definitions.length - 1);
index = Math.max(index, 0);
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const entryPre = this.getEntry(this.index);
if (entryPre !== null) {
entryPre.classList.remove('entry-current');
}
const entry = this.getEntry(index);
if (entry !== null) {
entry.classList.add('entry-current');
}
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this.index = index;
return entry;
}
entryScrollIntoView(index, scroll, smooth) {
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this.windowScroll.stop();
const entry = this.entrySetCurrent(index);
let target;
if (scroll !== null) {
target = scroll;
} else {
target = this.index === 0 || entry === null ? 0 : Display.getElementTop(entry);
}
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if (smooth) {
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this.windowScroll.animate(this.windowScroll.x, target, 200);
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} else {
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this.windowScroll.toY(target);
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}
}
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sourceTermView() {
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if (!this.context || !this.context.previous) { return; }
this.context.update({
index: this.index,
scroll: this.windowScroll.y
});
const previousContext = this.context.previous;
previousContext.set('disableHistory', true);
const details = {
definitions: previousContext.definitions,
context: previousContext.context
};
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this.setContent(previousContext.type, details);
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}
nextTermView() {
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if (!this.context || !this.context.next) { return; }
this.context.update({
index: this.index,
scroll: this.windowScroll.y
});
const nextContext = this.context.next;
nextContext.set('disableHistory', true);
const details = {
definitions: nextContext.definitions,
context: nextContext.context
};
this.setContent(nextContext.type, details);
}
noteTryAdd(mode) {
const button = this.adderButtonFind(this.index, mode);
if (button !== null && !button.classList.contains('disabled')) {
this.noteAdd(this.definitions[this.index], mode);
}
}
noteTryView() {
const button = this.viewerButtonFind(this.index);
if (button !== null && !button.classList.contains('disabled')) {
apiNoteView(button.dataset.noteId);
}
}
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async noteAdd(definition, mode) {
try {
this.setSpinnerVisible(true);
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const context = {};
if (this.noteUsesScreenshot()) {
const screenshot = await this.getScreenshot();
if (screenshot) {
context.screenshot = screenshot;
}
}
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const noteId = await apiDefinitionAdd(definition, mode, context, this.getOptionsContext());
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if (noteId) {
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const index = this.definitions.indexOf(definition);
const adderButton = this.adderButtonFind(index, mode);
if (adderButton !== null) {
adderButton.classList.add('disabled');
}
this.viewerButtonShow(index, noteId);
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} else {
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throw new Error('Note could not be added');
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}
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} catch (e) {
this.onError(e);
} finally {
this.setSpinnerVisible(false);
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}
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}
async audioPlay(definition, expressionIndex, entryIndex) {
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try {
this.setSpinnerVisible(true);
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const expression = expressionIndex === -1 ? definition : definition.expressions[expressionIndex];
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if (this.audioPlaying !== null) {
this.audioPlaying.pause();
this.audioPlaying = null;
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}
const sources = this.options.audio.sources;
let {audio, source} = await audioGetFromSources(expression, sources, this.getOptionsContext(), false, this.audioCache);
let info;
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if (audio === null) {
if (this.audioFallback === null) {
this.audioFallback = new Audio('/mixed/mp3/button.mp3');
}
audio = this.audioFallback;
info = 'Could not find audio';
} else {
info = `From source ${1 + sources.indexOf(source)}: ${source}`;
}
const button = this.audioButtonFindImage(entryIndex);
if (button !== null) {
let titleDefault = button.dataset.titleDefault;
if (!titleDefault) {
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titleDefault = button.title || '';
button.dataset.titleDefault = titleDefault;
}
button.title = `${titleDefault}\n${info}`;
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}
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this.audioPlaying = audio;
audio.currentTime = 0;
audio.volume = this.options.audio.volume / 100.0;
audio.play();
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} catch (e) {
this.onError(e);
} finally {
this.setSpinnerVisible(false);
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}
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}
noteUsesScreenshot() {
const fields = this.options.anki.terms.fields;
for (const name in fields) {
if (fields[name].includes('{screenshot}')) {
return true;
}
}
return false;
}
async getScreenshot() {
try {
await this.setPopupVisibleOverride(false);
await Display.delay(1); // Wait for popup to be hidden.
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const {format, quality} = this.options.anki.screenshot;
const dataUrl = await apiScreenshotGet({format, quality});
if (!dataUrl || dataUrl.error) { return; }
return {dataUrl, format};
} finally {
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await this.setPopupVisibleOverride(null);
}
}
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get firstExpressionIndex() {
return this.options.general.resultOutputMode === 'merge' ? 0 : -1;
}
setPopupVisibleOverride(visible) {
return apiForward('popupSetVisibleOverride', {visible});
}
setSpinnerVisible(visible) {
this.spinner.style.display = visible ? 'block' : '';
}
getEntry(index) {
const entries = this.container.querySelectorAll('.entry');
return index >= 0 && index < entries.length ? entries[index] : null;
}
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static clozeBuild({text, offset}, source) {
return {
sentence: text.trim(),
prefix: text.substring(0, offset).trim(),
body: text.substring(offset, offset + source.length),
suffix: text.substring(offset + source.length).trim()
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};
}
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entryIndexFind(element) {
const entry = element.closest('.entry');
return entry !== null ? Display.indexOf(this.container.querySelectorAll('.entry'), entry) : -1;
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}
adderButtonFind(index, mode) {
const entry = this.getEntry(index);
return entry !== null ? entry.querySelector(`.action-add-note[data-mode="${mode}"]`) : null;
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}
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viewerButtonFind(index) {
const entry = this.getEntry(index);
return entry !== null ? entry.querySelector('.action-view-note') : null;
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}
viewerButtonShow(index, noteId) {
const viewerButton = this.viewerButtonFind(index);
if (viewerButton === null) {
return;
}
viewerButton.classList.remove('pending', 'disabled');
viewerButton.dataset.noteId = noteId;
}
audioButtonFindImage(index) {
const entry = this.getEntry(index);
return entry !== null ? entry.querySelector('.action-play-audio>img') : null;
}
static delay(time) {
return new Promise((resolve) => setTimeout(resolve, time));
}
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static indexOf(nodeList, node) {
for (let i = 0, ii = nodeList.length; i < ii; ++i) {
if (nodeList[i] === node) {
return i;
}
}
return -1;
}
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static addEventListener(eventListeners, object, type, listener, options) {
object.addEventListener(type, listener, options);
eventListeners.push([object, type, listener, options]);
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}
static clearEventListeners(eventListeners) {
for (const [object, type, listener, options] of eventListeners) {
object.removeEventListener(type, listener, options);
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}
eventListeners.length = 0;
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}
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static getElementTop(element) {
const elementRect = element.getBoundingClientRect();
const documentRect = document.documentElement.getBoundingClientRect();
return elementRect.top - documentRect.top;
}
static getKeyFromEvent(event) {
const key = event.key;
return (typeof key === 'string' ? (key.length === 1 ? key.toUpperCase() : key) : '');
}
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}
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Display._onKeyDownHandlers = new Map([
['Escape', (self) => {
self.onSearchClear();
return true;
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}],
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['PageUp', (self, e) => {
if (e.altKey) {
self.entryScrollIntoView(self.index - 3, null, true);
return true;
}
return false;
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}],
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['PageDown', (self, e) => {
if (e.altKey) {
self.entryScrollIntoView(self.index + 3, null, true);
return true;
}
return false;
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}],
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['End', (self, e) => {
if (e.altKey) {
self.entryScrollIntoView(self.definitions.length - 1, null, true);
return true;
}
return false;
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}],
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['Home', (self, e) => {
if (e.altKey) {
self.entryScrollIntoView(0, null, true);
return true;
}
return false;
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}],
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['ArrowUp', (self, e) => {
if (e.altKey) {
self.entryScrollIntoView(self.index - 1, null, true);
return true;
}
return false;
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}],
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['ArrowDown', (self, e) => {
if (e.altKey) {
self.entryScrollIntoView(self.index + 1, null, true);
return true;
}
return false;
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}],
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['B', (self, e) => {
if (e.altKey) {
self.sourceTermView();
return true;
}
return false;
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}],
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['F', (self, e) => {
if (e.altKey) {
self.nextTermView();
return true;
}
return false;
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}],
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['E', (self, e) => {
if (e.altKey) {
self.noteTryAdd('term-kanji');
return true;
}
return false;
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}],
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['K', (self, e) => {
if (e.altKey) {
self.noteTryAdd('kanji');
return true;
}
return false;
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}],
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['R', (self, e) => {
if (e.altKey) {
self.noteTryAdd('term-kana');
return true;
}
return false;
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}],
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['P', (self, e) => {
if (e.altKey) {
const entry = self.getEntry(self.index);
if (entry !== null && entry.dataset.type === 'term') {
self.audioPlay(self.definitions[self.index], self.firstExpressionIndex, self.index);
}
return true;
}
return false;
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}],
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['V', (self, e) => {
if (e.altKey) {
self.noteTryView();
return true;
}
return false;
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}]
]);