350 lines
12 KiB
JavaScript
350 lines
12 KiB
JavaScript
/*
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* Copyright (C) 2016-2020 Yomichan Authors
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* 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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*/
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/* global
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* TextScanner
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* apiBroadcastTab
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* apiGetZoom
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* apiKanjiFind
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* apiOptionsGet
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* apiTermsFind
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* docSentenceExtract
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*/
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class Frontend {
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constructor(popup, getUrl=null) {
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this._id = yomichan.generateId(16);
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this.popup = popup;
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this._getUrl = getUrl;
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this._disabledOverride = false;
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this._options = null;
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this._pageZoomFactor = 1.0;
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this._contentScale = 1.0;
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this._orphaned = false;
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this._lastShowPromise = Promise.resolve();
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this._enabledEventListeners = new EventListenerCollection();
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this._textScanner = new TextScanner(
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window,
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() => this.popup.isProxy() ? [] : [this.popup.getContainer()],
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[(x, y) => this.popup.containsPoint(x, y)]
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);
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this._textScanner.onSearchSource = this.onSearchSource.bind(this);
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this._activeModifiers = new Set();
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this._optionsUpdatePending = false;
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this._windowMessageHandlers = new Map([
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['popupClose', () => this._textScanner.clearSelection(false)],
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['selectionCopy', () => document.execCommand('copy')]
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]);
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this._runtimeMessageHandlers = new Map([
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['popupSetVisibleOverride', ({visible}) => { this.popup.setVisibleOverride(visible); }],
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['rootPopupRequestInformationBroadcast', () => { this._broadcastRootPopupInformation(); }],
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['requestDocumentInformationBroadcast', ({uniqueId}) => { this._broadcastDocumentInformation(uniqueId); }]
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]);
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}
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get canClearSelection() {
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return this._textScanner.canClearSelection;
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}
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set canClearSelection(value) {
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this._textScanner.canClearSelection = value;
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}
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async prepare() {
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try {
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await this.updateOptions();
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const {zoomFactor} = await apiGetZoom();
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this._pageZoomFactor = zoomFactor;
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window.addEventListener('resize', this.onResize.bind(this), false);
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const visualViewport = window.visualViewport;
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if (visualViewport !== null && typeof visualViewport === 'object') {
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window.visualViewport.addEventListener('scroll', this.onVisualViewportScroll.bind(this));
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window.visualViewport.addEventListener('resize', this.onVisualViewportResize.bind(this));
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}
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yomichan.on('orphaned', this.onOrphaned.bind(this));
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yomichan.on('optionsUpdated', this.updateOptions.bind(this));
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yomichan.on('zoomChanged', this.onZoomChanged.bind(this));
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chrome.runtime.onMessage.addListener(this.onRuntimeMessage.bind(this));
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this._textScanner.on('clearSelection', this.onClearSelection.bind(this));
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this._textScanner.on('activeModifiersChanged', this.onActiveModifiersChanged.bind(this));
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this._updateContentScale();
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this._broadcastRootPopupInformation();
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} catch (e) {
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yomichan.logError(e);
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}
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}
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onResize() {
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this._updatePopupPosition();
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}
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onWindowMessage(e) {
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const action = e.data;
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const handler = this._windowMessageHandlers.get(action);
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if (typeof handler !== 'function') { return false; }
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handler();
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}
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onRuntimeMessage({action, params}, sender, callback) {
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const {targetPopupId} = params || {};
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if (typeof targetPopupId !== 'undefined' && targetPopupId !== this.popup.id) { return; }
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const handler = this._runtimeMessageHandlers.get(action);
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if (typeof handler !== 'function') { return false; }
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const result = handler(params, sender);
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callback(result);
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return false;
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}
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onOrphaned() {
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this._orphaned = true;
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}
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onZoomChanged({newZoomFactor}) {
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this._pageZoomFactor = newZoomFactor;
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this._updateContentScale();
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}
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onVisualViewportScroll() {
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this._updatePopupPosition();
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}
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onVisualViewportResize() {
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this._updateContentScale();
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}
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setDisabledOverride(disabled) {
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this._disabledOverride = disabled;
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this._updateTextScannerEnabled();
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}
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async setPopup(popup) {
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this._textScanner.clearSelection(true);
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this.popup = popup;
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await popup.setOptionsContext(await this.getOptionsContext(), this._id);
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}
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async updateOptions() {
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const optionsContext = await this.getOptionsContext();
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this._options = await apiOptionsGet(optionsContext);
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this._textScanner.setOptions(this._options);
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this._updateTextScannerEnabled();
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const ignoreNodes = ['.scan-disable', '.scan-disable *'];
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if (!this._options.scanning.enableOnPopupExpressions) {
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ignoreNodes.push('.source-text', '.source-text *');
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}
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this._textScanner.ignoreNodes = ignoreNodes.join(',');
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await this.popup.setOptionsContext(optionsContext, this._id);
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this._updateContentScale();
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const textSourceCurrent = this._textScanner.getCurrentTextSource();
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const causeCurrent = this._textScanner.causeCurrent;
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if (textSourceCurrent !== null && causeCurrent !== null) {
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await this.onSearchSource(textSourceCurrent, causeCurrent);
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}
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}
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async updatePendingOptions() {
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if (this._optionsUpdatePending) {
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this._optionsUpdatePending = false;
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await this.updateOptions();
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}
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}
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async setTextSource(textSource) {
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await this.onSearchSource(textSource, 'script');
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this._textScanner.setCurrentTextSource(textSource);
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}
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async onSearchSource(textSource, cause) {
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await this.updatePendingOptions();
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let results = null;
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try {
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if (textSource !== null) {
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const optionsContext = await this.getOptionsContext();
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results = (
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await this.findTerms(textSource, optionsContext) ||
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await this.findKanji(textSource, optionsContext)
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);
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if (results !== null) {
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const focus = (cause === 'mouse');
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this.showContent(textSource, focus, results.definitions, results.type, optionsContext);
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}
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}
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} catch (e) {
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if (this._orphaned) {
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if (textSource !== null && this._options.scanning.modifier !== 'none') {
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this._showPopupContent(textSource, await this.getOptionsContext(), 'orphaned');
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}
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} else {
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yomichan.logError(e);
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}
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} finally {
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if (results === null && this._options.scanning.autoHideResults) {
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this._textScanner.clearSelection(false);
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}
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}
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return results;
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}
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showContent(textSource, focus, definitions, type, optionsContext) {
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const {url} = optionsContext;
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const sentence = docSentenceExtract(textSource, this._options.anki.sentenceExt);
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this._showPopupContent(
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textSource,
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optionsContext,
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type,
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{definitions, context: {sentence, url, focus, disableHistory: true}}
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);
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}
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showContentCompleted() {
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return this._lastShowPromise;
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}
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async findTerms(textSource, optionsContext) {
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const searchText = this._textScanner.getTextSourceContent(textSource, this._options.scanning.length);
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if (searchText.length === 0) { return null; }
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const {definitions, length} = await apiTermsFind(searchText, {}, optionsContext);
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if (definitions.length === 0) { return null; }
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textSource.setEndOffset(length);
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return {definitions, type: 'terms'};
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}
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async findKanji(textSource, optionsContext) {
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const searchText = this._textScanner.getTextSourceContent(textSource, 1);
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if (searchText.length === 0) { return null; }
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const definitions = await apiKanjiFind(searchText, optionsContext);
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if (definitions.length === 0) { return null; }
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return {definitions, type: 'kanji'};
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}
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onClearSelection({passive}) {
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this.popup.hide(!passive);
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this.popup.clearAutoPlayTimer();
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this.updatePendingOptions();
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}
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async onActiveModifiersChanged({modifiers}) {
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if (areSetsEqual(modifiers, this._activeModifiers)) { return; }
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this._activeModifiers = modifiers;
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if (await this.popup.isVisible()) {
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this._optionsUpdatePending = true;
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return;
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}
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await this.updateOptions();
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}
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async getOptionsContext() {
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const url = this._getUrl !== null ? await this._getUrl() : window.location.href;
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const depth = this.popup.depth;
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const modifierKeys = [...this._activeModifiers];
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return {depth, url, modifierKeys};
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}
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_showPopupContent(textSource, optionsContext, type=null, details=null) {
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const context = {optionsContext, source: this._id};
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this._lastShowPromise = this.popup.showContent(
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textSource.getRect(),
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textSource.getWritingMode(),
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type,
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details,
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context
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);
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return this._lastShowPromise;
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}
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_updateTextScannerEnabled() {
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const enabled = (
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this._options.general.enable &&
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this.popup.depth <= this._options.scanning.popupNestingMaxDepth &&
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!this._disabledOverride
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);
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this._enabledEventListeners.removeAllEventListeners();
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this._textScanner.setEnabled(enabled);
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if (enabled) {
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this._enabledEventListeners.addEventListener(window, 'message', this.onWindowMessage.bind(this));
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}
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}
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_updateContentScale() {
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const {popupScalingFactor, popupScaleRelativeToPageZoom, popupScaleRelativeToVisualViewport} = this._options.general;
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let contentScale = popupScalingFactor;
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if (popupScaleRelativeToPageZoom) {
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contentScale /= this._pageZoomFactor;
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}
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if (popupScaleRelativeToVisualViewport) {
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const visualViewport = window.visualViewport;
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const visualViewportScale = (visualViewport !== null && typeof visualViewport === 'object' ? visualViewport.scale : 1.0);
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contentScale /= visualViewportScale;
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}
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if (contentScale === this._contentScale) { return; }
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this._contentScale = contentScale;
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this.popup.setContentScale(this._contentScale);
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this._updatePopupPosition();
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}
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_broadcastRootPopupInformation() {
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if (!this.popup.isProxy() && this.popup.depth === 0 && this.popup.frameId === 0) {
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apiBroadcastTab('rootPopupInformation', {popupId: this.popup.id, frameId: this.popup.frameId});
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}
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}
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_broadcastDocumentInformation(uniqueId) {
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apiBroadcastTab('documentInformationBroadcast', {
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uniqueId,
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frameId: this.popup.frameId,
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title: document.title
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});
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}
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async _updatePopupPosition() {
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const textSource = this._textScanner.getCurrentTextSource();
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if (textSource !== null && await this.popup.isVisible()) {
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this._showPopupContent(textSource, await this.getOptionsContext());
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}
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}
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}
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