272 lines
8.5 KiB
JavaScript
272 lines
8.5 KiB
JavaScript
/*
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* Copyright (C) 2016-2020 Alex Yatskov <alex@foosoft.net>
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* Author: Alex Yatskov <alex@foosoft.net>
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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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* 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 extends TextScanner {
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constructor(popup) {
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super(
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window,
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popup.isProxy() ? [] : [popup.getContainer()],
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[(x, y) => this.popup.containsPoint(x, y)]
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);
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this.popup = popup;
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this.options = null;
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this.optionsContext = {
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depth: popup.depth,
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url: popup.url
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};
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this._pageZoomFactor = 1.0;
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this._contentScale = 1.0;
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this._orphaned = true;
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this._lastShowPromise = Promise.resolve();
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this._windowMessageHandlers = new Map([
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['popupClose', () => this.onSearchClear(true)],
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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.popup.broadcastRootPopupInformation(); }]
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]);
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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._updateContentScale();
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this.popup.broadcastRootPopupInformation();
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} catch (e) {
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this.onError(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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getMouseEventListeners() {
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return [
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...super.getMouseEventListeners(),
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[window, 'message', this.onWindowMessage.bind(this)]
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];
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}
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async updateOptions() {
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this.setOptions(await apiOptionsGet(this.getOptionsContext()));
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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.ignoreNodes = ignoreNodes.join(',');
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await this.popup.setOptions(this.options);
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this._updateContentScale();
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if (this.textSourceCurrent !== null && this.causeCurrent !== null) {
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await this.onSearchSource(this.textSourceCurrent, this.causeCurrent);
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}
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}
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async onSearchSource(textSource, cause) {
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let results = null;
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try {
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if (textSource !== null) {
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results = (
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await this.findTerms(textSource) ||
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await this.findKanji(textSource)
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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);
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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, 'orphaned');
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}
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} else {
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this.onError(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.onSearchClear(true);
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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) {
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const sentence = docSentenceExtract(textSource, this.options.anki.sentenceExt);
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const url = window.location.href;
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this._showPopupContent(
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textSource,
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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) {
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this.setTextSourceScanLength(textSource, this.options.scanning.length);
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const searchText = textSource.text();
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if (searchText.length === 0) { return null; }
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const {definitions, length} = await apiTermsFind(searchText, {}, this.getOptionsContext());
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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) {
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this.setTextSourceScanLength(textSource, 1);
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const searchText = textSource.text();
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if (searchText.length === 0) { return null; }
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const definitions = await apiKanjiFind(searchText, this.getOptionsContext());
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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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onSearchClear(changeFocus) {
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this.popup.hide(changeFocus);
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this.popup.clearAutoPlayTimer();
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super.onSearchClear(changeFocus);
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}
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getOptionsContext() {
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this.optionsContext.url = this.popup.url;
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return this.optionsContext;
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}
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_showPopupContent(textSource, type=null, details=null) {
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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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);
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return this._lastShowPromise;
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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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contentScale /= Frontend._getVisualViewportScale();
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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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async _updatePopupPosition() {
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const textSource = this.getCurrentTextSource();
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if (textSource !== null && await this.popup.isVisible()) {
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this._showPopupContent(textSource);
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}
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}
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static _getVisualViewportScale() {
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const visualViewport = window.visualViewport;
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return visualViewport !== null && typeof visualViewport === 'object' ? visualViewport.scale : 1.0;
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}
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}
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