768 lines
26 KiB
JavaScript
768 lines
26 KiB
JavaScript
/*
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* Copyright (C) 2016-2022 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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* DocumentUtil
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* TextScanner
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* TextSourceRange
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*/
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/**
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* This is the main class responsible for scanning and handling webpage content.
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*/
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class Frontend {
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/**
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* Creates a new instance.
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* @param {object} details
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* @param {string} details.pageType The type of page, one of 'web', 'popup', or 'search'.
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* @param {PopupFactory} details.popupFactory A PopupFactory instance to use for generating popups.
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* @param {number} details.depth The nesting depth value of the popup.
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* @param {number} details.tabId The tab ID of the host tab.
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* @param {number} details.frameId The frame ID of the host frame.
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* @param {?string} details.parentPopupId The popup ID of the parent popup if one exists, otherwise null.
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* @param {?number} details.parentFrameId The frame ID of the parent popup if one exists, otherwise null.
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* @param {boolean} details.useProxyPopup Whether or not proxy popups should be used.
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* @param {boolean} details.canUseWindowPopup Whether or not window popups can be used.
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* @param {boolean} details.allowRootFramePopupProxy Whether or not popups can be hosted in the root frame.
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* @param {boolean} details.childrenSupported Whether popups can create child popups or not.
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* @param {HotkeyHandler} details.hotkeyHandler A HotkeyHandler instance.
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*/
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constructor({
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pageType,
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popupFactory,
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depth,
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tabId,
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frameId,
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parentPopupId,
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parentFrameId,
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useProxyPopup,
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canUseWindowPopup=true,
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allowRootFramePopupProxy,
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childrenSupported=true,
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hotkeyHandler
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}) {
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this._pageType = pageType;
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this._popupFactory = popupFactory;
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this._depth = depth;
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this._tabId = tabId;
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this._frameId = frameId;
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this._parentPopupId = parentPopupId;
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this._parentFrameId = parentFrameId;
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this._useProxyPopup = useProxyPopup;
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this._canUseWindowPopup = canUseWindowPopup;
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this._allowRootFramePopupProxy = allowRootFramePopupProxy;
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this._childrenSupported = childrenSupported;
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this._hotkeyHandler = hotkeyHandler;
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this._popup = null;
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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._lastShowPromise = Promise.resolve();
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this._documentUtil = new DocumentUtil();
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this._textScanner = new TextScanner({
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node: window,
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ignoreElements: this._ignoreElements.bind(this),
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ignorePoint: this._ignorePoint.bind(this),
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getSearchContext: this._getSearchContext.bind(this),
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documentUtil: this._documentUtil,
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searchTerms: true,
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searchKanji: true
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});
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this._textScannerHasBeenEnabled = false;
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this._popupCache = new Map();
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this._popupEventListeners = new EventListenerCollection();
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this._updatePopupToken = null;
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this._clearSelectionTimer = null;
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this._isPointerOverPopup = false;
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this._optionsContextOverride = null;
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this._runtimeMessageHandlers = new Map([
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['Frontend.requestReadyBroadcast', {async: false, handler: this._onMessageRequestFrontendReadyBroadcast.bind(this)}],
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['Frontend.setAllVisibleOverride', {async: true, handler: this._onApiSetAllVisibleOverride.bind(this)}],
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['Frontend.clearAllVisibleOverride', {async: true, handler: this._onApiClearAllVisibleOverride.bind(this)}]
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]);
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this._hotkeyHandler.registerActions([
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['scanSelectedText', this._onActionScanSelectedText.bind(this)],
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['scanTextAtCaret', this._onActionScanTextAtCaret.bind(this)]
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]);
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}
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/**
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* Get whether or not the text selection can be cleared.
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* @type {boolean}
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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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/**
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* Set whether or not the text selection can be cleared.
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* @param {boolean} value The new value to assign.
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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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/**
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* Gets the popup instance.
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* @type {Popup}
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*/
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get popup() {
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return this._popup;
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}
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/**
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* Prepares the instance for use.
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*/
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async prepare() {
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await this.updateOptions();
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try {
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const {zoomFactor} = await yomichan.api.getZoom();
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this._pageZoomFactor = zoomFactor;
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} catch (e) {
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// Ignore exceptions which may occur due to being on an unsupported page (e.g. about:blank)
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}
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this._textScanner.prepare();
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window.addEventListener('resize', this._onResize.bind(this), false);
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DocumentUtil.addFullscreenChangeEventListener(this._updatePopup.bind(this));
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const visualViewport = window.visualViewport;
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if (visualViewport !== null && typeof visualViewport === 'object') {
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visualViewport.addEventListener('scroll', this._onVisualViewportScroll.bind(this));
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visualViewport.addEventListener('resize', this._onVisualViewportResize.bind(this));
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}
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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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yomichan.on('closePopups', this._onClosePopups.bind(this));
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chrome.runtime.onMessage.addListener(this._onRuntimeMessage.bind(this));
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this._textScanner.on('clear', this._onTextScannerClear.bind(this));
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this._textScanner.on('searched', this._onSearched.bind(this));
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yomichan.crossFrame.registerHandlers([
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['Frontend.closePopup', {async: false, handler: this._onApiClosePopup.bind(this)}],
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['Frontend.copySelection', {async: false, handler: this._onApiCopySelection.bind(this)}],
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['Frontend.getSelectionText', {async: false, handler: this._onApiGetSelectionText.bind(this)}],
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['Frontend.getPopupInfo', {async: false, handler: this._onApiGetPopupInfo.bind(this)}],
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['Frontend.getPageInfo', {async: false, handler: this._onApiGetPageInfo.bind(this)}]
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]);
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this._updateContentScale();
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this._signalFrontendReady();
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}
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/**
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* Set whether or not the instance is disabled.
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* @param {boolean} disabled Whether or not the instance is disabled.
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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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/**
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* Set or clear an override options context object.
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* @param {?object} optionsContext An options context object to use as the override, or `null` to clear the override.
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*/
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setOptionsContextOverride(optionsContext) {
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this._optionsContextOverride = optionsContext;
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}
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/**
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* Performs a new search on a specific source.
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* @param {TextSourceRange|TextSourceElement} textSource The text source to search.
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*/
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async setTextSource(textSource) {
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this._textScanner.setCurrentTextSource(null);
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await this._textScanner.search(textSource);
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}
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/**
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* Updates the internal options representation.
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*/
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async updateOptions() {
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try {
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await this._updateOptionsInternal();
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} catch (e) {
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if (!yomichan.isExtensionUnloaded) {
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throw e;
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}
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}
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}
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/**
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* Waits for the previous `showContent` call to be completed.
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* @returns {Promise} A promise which is resolved when the previous `showContent` call has completed.
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*/
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showContentCompleted() {
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return this._lastShowPromise;
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}
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// Message handlers
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_onMessageRequestFrontendReadyBroadcast({frameId}) {
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this._signalFrontendReady(frameId);
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}
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// Action handlers
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_onActionScanSelectedText() {
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this._scanSelectedText(false);
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}
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_onActionScanTextAtCaret() {
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this._scanSelectedText(true);
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}
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// API message handlers
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_onApiGetUrl() {
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return window.location.href;
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}
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_onApiClosePopup() {
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this._clearSelection(false);
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}
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_onApiCopySelection() {
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// This will not work on Firefox if a popup has focus, which is usually the case when this function is called.
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document.execCommand('copy');
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}
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_onApiGetSelectionText() {
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return document.getSelection().toString();
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}
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_onApiGetPopupInfo() {
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return {
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popupId: (this._popup !== null ? this._popup.id : null)
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};
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}
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_onApiGetPageInfo() {
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return {
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url: window.location.href,
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documentTitle: document.title
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};
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}
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async _onApiSetAllVisibleOverride({value, priority, awaitFrame}) {
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const result = await this._popupFactory.setAllVisibleOverride(value, priority);
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if (awaitFrame) {
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await promiseAnimationFrame(100);
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}
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return result;
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}
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async _onApiClearAllVisibleOverride({token}) {
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return await this._popupFactory.clearAllVisibleOverride(token);
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}
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// Private
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_onResize() {
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this._updatePopupPosition();
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}
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_onRuntimeMessage({action, params}, sender, callback) {
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const messageHandler = this._runtimeMessageHandlers.get(action);
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if (typeof messageHandler === 'undefined') { return false; }
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return invokeMessageHandler(messageHandler, params, callback, sender);
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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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_onClosePopups() {
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this._clearSelection(true);
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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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_onTextScannerClear() {
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this._clearSelection(false);
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}
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_onSearched({type, dictionaryEntries, sentence, inputInfo: {eventType, passive, detail}, textSource, optionsContext, detail: {documentTitle}, error}) {
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const scanningOptions = this._options.scanning;
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if (error !== null) {
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if (yomichan.isExtensionUnloaded) {
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if (textSource !== null && !passive) {
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this._showExtensionUnloaded(textSource);
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}
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} else {
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log.error(error);
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}
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} if (type !== null) {
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this._stopClearSelectionDelayed();
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let focus = (eventType === 'mouseMove');
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if (isObject(detail)) {
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const focus2 = detail.focus;
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if (typeof focus2 === 'boolean') { focus = focus2; }
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}
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this._showContent(textSource, focus, dictionaryEntries, type, sentence, documentTitle, optionsContext);
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} else {
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if (scanningOptions.autoHideResults) {
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this._clearSelectionDelayed(scanningOptions.hideDelay, false);
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}
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}
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}
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_onPopupFramePointerOver() {
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this._isPointerOverPopup = true;
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this._stopClearSelectionDelayed();
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}
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_onPopupFramePointerOut() {
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this._isPointerOverPopup = false;
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}
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_clearSelection(passive) {
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this._stopClearSelectionDelayed();
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if (this._popup !== null) {
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this._popup.clearAutoPlayTimer();
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this._popup.hide(!passive);
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this._isPointerOverPopup = false;
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}
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this._textScanner.clearSelection();
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}
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_clearSelectionDelayed(delay, restart, passive) {
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if (!this._textScanner.hasSelection()) { return; }
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if (delay > 0) {
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if (this._clearSelectionTimer !== null && !restart) { return; } // Already running
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this._stopClearSelectionDelayed();
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this._clearSelectionTimer = setTimeout(() => {
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this._clearSelectionTimer = null;
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if (this._isPointerOverPopup) { return; }
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this._clearSelection(passive);
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}, delay);
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} else {
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this._clearSelection(passive);
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}
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}
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_stopClearSelectionDelayed() {
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if (this._clearSelectionTimer !== null) {
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clearTimeout(this._clearSelectionTimer);
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this._clearSelectionTimer = null;
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}
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}
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async _updateOptionsInternal() {
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const optionsContext = await this._getOptionsContext();
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const options = await yomichan.api.optionsGet(optionsContext);
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const {scanning: scanningOptions, sentenceParsing: sentenceParsingOptions} = options;
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this._options = options;
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this._hotkeyHandler.setHotkeys('web', options.inputs.hotkeys);
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await this._updatePopup();
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const preventMiddleMouse = this._getPreventMiddleMouseValueForPageType(scanningOptions.preventMiddleMouse);
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this._textScanner.setOptions({
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inputs: scanningOptions.inputs,
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deepContentScan: scanningOptions.deepDomScan,
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selectText: scanningOptions.selectText,
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delay: scanningOptions.delay,
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touchInputEnabled: scanningOptions.touchInputEnabled,
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pointerEventsEnabled: scanningOptions.pointerEventsEnabled,
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scanLength: scanningOptions.length,
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layoutAwareScan: scanningOptions.layoutAwareScan,
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matchTypePrefix: scanningOptions.matchTypePrefix,
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preventMiddleMouse,
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sentenceParsingOptions
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});
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this._updateTextScannerEnabled();
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if (this._pageType !== 'web') {
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const excludeSelectors = ['.scan-disable', '.scan-disable *'];
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if (!scanningOptions.enableOnPopupExpressions) {
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excludeSelectors.push('.source-text', '.source-text *');
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}
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this._textScanner.excludeSelector = excludeSelectors.join(',');
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}
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this._updateContentScale();
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await this._textScanner.searchLast();
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}
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async _updatePopup() {
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const {usePopupWindow, showIframePopupsInRootFrame} = this._options.general;
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const isIframe = !this._useProxyPopup && (window !== window.parent);
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const currentPopup = this._popup;
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let popupPromise;
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if (usePopupWindow && this._canUseWindowPopup) {
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popupPromise = this._popupCache.get('window');
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if (typeof popupPromise === 'undefined') {
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popupPromise = this._getPopupWindow();
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this._popupCache.set('window', popupPromise);
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}
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} else if (
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isIframe &&
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showIframePopupsInRootFrame &&
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DocumentUtil.getFullscreenElement() === null &&
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this._allowRootFramePopupProxy
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) {
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popupPromise = this._popupCache.get('iframe');
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if (typeof popupPromise === 'undefined') {
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popupPromise = this._getIframeProxyPopup();
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this._popupCache.set('iframe', popupPromise);
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}
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} else if (this._useProxyPopup) {
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popupPromise = this._popupCache.get('proxy');
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if (typeof popupPromise === 'undefined') {
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popupPromise = this._getProxyPopup();
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this._popupCache.set('proxy', popupPromise);
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}
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} else {
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popupPromise = this._popupCache.get('default');
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if (typeof popupPromise === 'undefined') {
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popupPromise = this._getDefaultPopup();
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this._popupCache.set('default', popupPromise);
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}
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}
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// The token below is used as a unique identifier to ensure that a new _updatePopup call
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// hasn't been started during the await.
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const token = {};
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this._updatePopupToken = token;
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const popup = await popupPromise;
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const optionsContext = await this._getOptionsContext();
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if (this._updatePopupToken !== token) { return; }
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if (popup !== null) {
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await popup.setOptionsContext(optionsContext);
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}
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if (this._updatePopupToken !== token) { return; }
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if (popup !== currentPopup) {
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this._clearSelection(true);
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}
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this._popupEventListeners.removeAllEventListeners();
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this._popup = popup;
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if (popup !== null) {
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this._popupEventListeners.on(popup, 'framePointerOver', this._onPopupFramePointerOver.bind(this));
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this._popupEventListeners.on(popup, 'framePointerOut', this._onPopupFramePointerOut.bind(this));
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}
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this._isPointerOverPopup = false;
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}
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async _getDefaultPopup() {
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const isXmlDocument = (typeof XMLDocument !== 'undefined' && document instanceof XMLDocument);
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if (isXmlDocument) {
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return null;
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}
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return await this._popupFactory.getOrCreatePopup({
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frameId: this._frameId,
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depth: this._depth,
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childrenSupported: this._childrenSupported
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});
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}
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async _getProxyPopup() {
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return await this._popupFactory.getOrCreatePopup({
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frameId: this._parentFrameId,
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depth: this._depth,
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parentPopupId: this._parentPopupId,
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childrenSupported: this._childrenSupported
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});
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}
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async _getIframeProxyPopup() {
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const targetFrameId = 0; // Root frameId
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try {
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await this._waitForFrontendReady(targetFrameId, 10000);
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} catch (e) {
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// Root frame not available
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return await this._getDefaultPopup();
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}
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const {popupId} = await yomichan.crossFrame.invoke(targetFrameId, 'Frontend.getPopupInfo');
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if (popupId === null) {
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return null;
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}
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const popup = await this._popupFactory.getOrCreatePopup({
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frameId: targetFrameId,
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id: popupId,
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childrenSupported: this._childrenSupported
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});
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popup.on('offsetNotFound', () => {
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this._allowRootFramePopupProxy = false;
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this._updatePopup();
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});
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return popup;
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}
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async _getPopupWindow() {
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return await this._popupFactory.getOrCreatePopup({
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depth: this._depth,
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popupWindow: true,
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childrenSupported: this._childrenSupported
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});
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|
}
|
|
|
|
_ignoreElements() {
|
|
if (this._popup !== null) {
|
|
const container = this._popup.container;
|
|
if (container !== null) {
|
|
return [container];
|
|
}
|
|
}
|
|
return [];
|
|
}
|
|
|
|
async _ignorePoint(x, y) {
|
|
try {
|
|
return this._popup !== null && await this._popup.containsPoint(x, y);
|
|
} catch (e) {
|
|
if (!yomichan.isExtensionUnloaded) {
|
|
throw e;
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
|
|
_showExtensionUnloaded(textSource) {
|
|
if (textSource === null) {
|
|
textSource = this._textScanner.getCurrentTextSource();
|
|
if (textSource === null) { return; }
|
|
}
|
|
this._showPopupContent(textSource, null);
|
|
}
|
|
|
|
_showContent(textSource, focus, dictionaryEntries, type, sentence, documentTitle, optionsContext) {
|
|
const query = textSource.text();
|
|
const {url} = optionsContext;
|
|
const details = {
|
|
focus,
|
|
historyMode: 'clear',
|
|
params: {
|
|
type,
|
|
query,
|
|
wildcards: 'off'
|
|
},
|
|
state: {
|
|
focusEntry: 0,
|
|
optionsContext,
|
|
url,
|
|
sentence,
|
|
documentTitle
|
|
},
|
|
content: {
|
|
dictionaryEntries,
|
|
contentOrigin: {
|
|
tabId: this._tabId,
|
|
frameId: this._frameId
|
|
}
|
|
}
|
|
};
|
|
if (textSource.type === 'element' && textSource.fullContent !== query) {
|
|
details.params.full = textSource.fullContent;
|
|
details.params['full-visible'] = 'true';
|
|
}
|
|
this._showPopupContent(textSource, optionsContext, details);
|
|
}
|
|
|
|
_showPopupContent(textSource, optionsContext, details=null) {
|
|
const {left, top, width, height} = textSource.getRect();
|
|
this._lastShowPromise = (
|
|
this._popup !== null ?
|
|
this._popup.showContent(
|
|
{
|
|
optionsContext,
|
|
elementRect: {x: left, y: top, width, height, valid: true},
|
|
writingMode: textSource.getWritingMode()
|
|
},
|
|
details
|
|
) :
|
|
Promise.resolve()
|
|
);
|
|
this._lastShowPromise.catch((error) => {
|
|
if (yomichan.isExtensionUnloaded) { return; }
|
|
log.error(error);
|
|
});
|
|
return this._lastShowPromise;
|
|
}
|
|
|
|
_updateTextScannerEnabled() {
|
|
const enabled = (this._options !== null && this._options.general.enable && !this._disabledOverride);
|
|
if (enabled === this._textScanner.isEnabled()) { return; }
|
|
this._textScanner.setEnabled(enabled);
|
|
if (this._textScannerHasBeenEnabled) {
|
|
this._clearSelection(true);
|
|
}
|
|
if (enabled) {
|
|
this._textScannerHasBeenEnabled = true;
|
|
}
|
|
}
|
|
|
|
_updateContentScale() {
|
|
const {popupScalingFactor, popupScaleRelativeToPageZoom, popupScaleRelativeToVisualViewport} = this._options.general;
|
|
let contentScale = popupScalingFactor;
|
|
if (popupScaleRelativeToPageZoom) {
|
|
contentScale /= this._pageZoomFactor;
|
|
}
|
|
if (popupScaleRelativeToVisualViewport) {
|
|
const visualViewport = window.visualViewport;
|
|
const visualViewportScale = (visualViewport !== null && typeof visualViewport === 'object' ? visualViewport.scale : 1.0);
|
|
contentScale /= visualViewportScale;
|
|
}
|
|
if (contentScale === this._contentScale) { return; }
|
|
|
|
this._contentScale = contentScale;
|
|
if (this._popup !== null) {
|
|
this._popup.setContentScale(this._contentScale);
|
|
}
|
|
this._updatePopupPosition();
|
|
}
|
|
|
|
async _updatePopupPosition() {
|
|
const textSource = this._textScanner.getCurrentTextSource();
|
|
if (
|
|
textSource !== null &&
|
|
this._popup !== null &&
|
|
await this._popup.isVisible()
|
|
) {
|
|
this._showPopupContent(textSource, null);
|
|
}
|
|
}
|
|
|
|
_signalFrontendReady(targetFrameId=null) {
|
|
const params = {frameId: this._frameId};
|
|
if (targetFrameId === null) {
|
|
yomichan.api.broadcastTab('frontendReady', params);
|
|
} else {
|
|
yomichan.api.sendMessageToFrame(targetFrameId, 'frontendReady', params);
|
|
}
|
|
}
|
|
|
|
async _waitForFrontendReady(frameId, timeout) {
|
|
return new Promise((resolve, reject) => {
|
|
let timeoutId = null;
|
|
|
|
const cleanup = () => {
|
|
if (timeoutId !== null) {
|
|
clearTimeout(timeoutId);
|
|
timeoutId = null;
|
|
}
|
|
chrome.runtime.onMessage.removeListener(onMessage);
|
|
};
|
|
const onMessage = (message, sender, sendResponse) => {
|
|
try {
|
|
const {action, params} = message;
|
|
if (action === 'frontendReady' && params.frameId === frameId) {
|
|
cleanup();
|
|
resolve();
|
|
sendResponse();
|
|
}
|
|
} catch (e) {
|
|
// NOP
|
|
}
|
|
};
|
|
|
|
if (timeout !== null) {
|
|
timeoutId = setTimeout(() => {
|
|
timeoutId = null;
|
|
cleanup();
|
|
reject(new Error(`Wait for frontend ready timed out after ${timeout}ms`));
|
|
}, timeout);
|
|
}
|
|
|
|
chrome.runtime.onMessage.addListener(onMessage);
|
|
yomichan.api.broadcastTab('Frontend.requestReadyBroadcast', {frameId: this._frameId});
|
|
});
|
|
}
|
|
|
|
_getPreventMiddleMouseValueForPageType(preventMiddleMouseOptions) {
|
|
switch (this._pageType) {
|
|
case 'web': return preventMiddleMouseOptions.onWebPages;
|
|
case 'popup': return preventMiddleMouseOptions.onPopupPages;
|
|
case 'search': return preventMiddleMouseOptions.onSearchPages;
|
|
default: return false;
|
|
}
|
|
}
|
|
|
|
async _getOptionsContext() {
|
|
let optionsContext = this._optionsContextOverride;
|
|
if (optionsContext === null) {
|
|
optionsContext = (await this._getSearchContext()).optionsContext;
|
|
}
|
|
return optionsContext;
|
|
}
|
|
|
|
async _getSearchContext() {
|
|
let url = window.location.href;
|
|
let documentTitle = document.title;
|
|
if (this._useProxyPopup) {
|
|
try {
|
|
({url, documentTitle} = await yomichan.crossFrame.invoke(this._parentFrameId, 'Frontend.getPageInfo', {}));
|
|
} catch (e) {
|
|
// NOP
|
|
}
|
|
}
|
|
|
|
let optionsContext = this._optionsContextOverride;
|
|
if (optionsContext === null) {
|
|
optionsContext = {depth: this._depth, url};
|
|
}
|
|
|
|
return {
|
|
optionsContext,
|
|
detail: {documentTitle}
|
|
};
|
|
}
|
|
|
|
async _scanSelectedText(allowEmptyRange) {
|
|
const range = this._getFirstSelectionRange(allowEmptyRange);
|
|
if (range === null) { return false; }
|
|
const source = new TextSourceRange(range, range.toString(), null, null);
|
|
await this._textScanner.search(source, {focus: true, restoreSelection: true});
|
|
return true;
|
|
}
|
|
|
|
_getFirstSelectionRange(allowEmptyRange) {
|
|
const selection = window.getSelection();
|
|
for (let i = 0, ii = selection.rangeCount; i < ii; ++i) {
|
|
const range = selection.getRangeAt(i);
|
|
if (range.toString().length > 0 || allowEmptyRange) {
|
|
return range;
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
}
|