/* * Copyright (C) 2016-2017 Alex Yatskov <alex@foosoft.net> * Author: Alex Yatskov <alex@foosoft.net> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ class Frontend { constructor(popup, ignoreNodes) { this.popup = popup; this.popupTimerPromise = null; this.textSourceCurrent = null; this.pendingLookup = false; this.options = null; this.ignoreNodes = (Array.isArray(ignoreNodes) && ignoreNodes.length > 0 ? ignoreNodes.join(',') : null); this.optionsContext = { depth: popup.depth, url: popup.url }; this.primaryTouchIdentifier = null; this.preventNextContextMenu = false; this.preventNextMouseDown = false; this.preventNextClick = false; this.preventScroll = false; this.enabled = false; this.eventListeners = []; this.isPreparedPromiseResolve = null; this.isPreparedPromise = new Promise((resolve) => { this.isPreparedPromiseResolve = resolve; }); this.lastShowPromise = Promise.resolve(); } static create() { const data = window.frontendInitializationData || {}; const {id, depth=0, parentFrameId, ignoreNodes, url, proxy=false} = data; const popup = proxy ? new PopupProxy(depth + 1, id, parentFrameId, url) : PopupProxyHost.instance.createPopup(null, depth); const frontend = new Frontend(popup, ignoreNodes); frontend.prepare(); return frontend; } async prepare() { try { await this.updateOptions(); chrome.runtime.onMessage.addListener(this.onRuntimeMessage.bind(this)); this.isPreparedPromiseResolve(); } catch (e) { this.onError(e); } } isPrepared() { return this.isPreparedPromise; } onMouseOver(e) { if (e.target === this.popup.container) { this.popupTimerClear(); } } onMouseMove(e) { this.popupTimerClear(); if (this.pendingLookup || Frontend.isMouseButtonDown('primary', e)) { return; } const scanningOptions = this.options.scanning; const scanningModifier = scanningOptions.modifier; if (!( Frontend.isScanningModifierPressed(scanningModifier, e) || (scanningOptions.middleMouse && Frontend.isMouseButtonDown('auxiliary', e)) )) { return; } const search = async () => { if (scanningModifier === 'none') { if (!await this.popupTimerWait()) { // Aborted return; } } await this.searchAt(e.clientX, e.clientY, 'mouse'); }; search(); } onMouseDown(e) { if (this.preventNextMouseDown) { this.preventNextMouseDown = false; this.preventNextClick = true; e.preventDefault(); e.stopPropagation(); return false; } if (e.button === 0) { this.popupTimerClear(); this.searchClear(true); } } onMouseOut(e) { this.popupTimerClear(); } onClick(e) { if (this.preventNextClick) { this.preventNextClick = false; e.preventDefault(); e.stopPropagation(); return false; } } onAuxClick(e) { this.preventNextContextMenu = false; } onContextMenu(e) { if (this.preventNextContextMenu) { this.preventNextContextMenu = false; e.preventDefault(); e.stopPropagation(); return false; } } onTouchStart(e) { if (this.primaryTouchIdentifier !== null || e.changedTouches.length === 0) { return; } this.preventScroll = false; this.preventNextContextMenu = false; this.preventNextMouseDown = false; this.preventNextClick = false; const primaryTouch = e.changedTouches[0]; if (Frontend.selectionContainsPoint(window.getSelection(), primaryTouch.clientX, primaryTouch.clientY)) { return; } this.primaryTouchIdentifier = primaryTouch.identifier; if (this.pendingLookup) { return; } const textSourceCurrentPrevious = this.textSourceCurrent !== null ? this.textSourceCurrent.clone() : null; this.searchAt(primaryTouch.clientX, primaryTouch.clientY, 'touchStart') .then(() => { if ( this.textSourceCurrent === null || this.textSourceCurrent.equals(textSourceCurrentPrevious) ) { return; } this.preventScroll = true; this.preventNextContextMenu = true; this.preventNextMouseDown = true; }); } onTouchEnd(e) { if ( this.primaryTouchIdentifier === null || this.getIndexOfTouch(e.changedTouches, this.primaryTouchIdentifier) < 0 ) { return; } this.primaryTouchIdentifier = null; this.preventScroll = false; this.preventNextClick = false; // Don't revert context menu and mouse down prevention, // since these events can occur after the touch has ended. // this.preventNextContextMenu = false; // this.preventNextMouseDown = false; } onTouchCancel(e) { this.onTouchEnd(e); } onTouchMove(e) { if (!this.preventScroll || !e.cancelable || this.primaryTouchIdentifier === null) { return; } const touches = e.changedTouches; const index = this.getIndexOfTouch(touches, this.primaryTouchIdentifier); if (index < 0) { return; } const primaryTouch = touches[index]; this.searchAt(primaryTouch.clientX, primaryTouch.clientY, 'touchMove'); e.preventDefault(); // Disable scroll } async onResize() { if (this.textSourceCurrent !== null && await this.popup.isVisibleAsync()) { const textSource = this.textSourceCurrent; this.lastShowPromise = this.popup.showContent( textSource.getRect(), textSource.getWritingMode() ); } } onWindowMessage(e) { const action = e.data; const handlers = Frontend.windowMessageHandlers; if (handlers.hasOwnProperty(action)) { const handler = handlers[action]; handler(this); } } onRuntimeMessage({action, params}, sender, callback) { const handlers = Frontend.runtimeMessageHandlers; if (handlers.hasOwnProperty(action)) { const handler = handlers[action]; const result = handler(this, params); callback(result); } } onError(error) { logError(error, false); } setEnabled(enabled) { if (enabled) { if (!this.enabled) { this.hookEvents(); this.enabled = true; } } else { if (this.enabled) { this.clearEventListeners(); this.enabled = false; } this.searchClear(false); } } hookEvents() { this.addEventListener(window, 'message', this.onWindowMessage.bind(this)); this.addEventListener(window, 'mousedown', this.onMouseDown.bind(this)); this.addEventListener(window, 'mousemove', this.onMouseMove.bind(this)); this.addEventListener(window, 'mouseover', this.onMouseOver.bind(this)); this.addEventListener(window, 'mouseout', this.onMouseOut.bind(this)); this.addEventListener(window, 'resize', this.onResize.bind(this)); if (this.options.scanning.touchInputEnabled) { this.addEventListener(window, 'click', this.onClick.bind(this)); this.addEventListener(window, 'auxclick', this.onAuxClick.bind(this)); this.addEventListener(window, 'touchstart', this.onTouchStart.bind(this)); this.addEventListener(window, 'touchend', this.onTouchEnd.bind(this)); this.addEventListener(window, 'touchcancel', this.onTouchCancel.bind(this)); this.addEventListener(window, 'touchmove', this.onTouchMove.bind(this), {passive: false}); this.addEventListener(window, 'contextmenu', this.onContextMenu.bind(this)); } } addEventListener(node, type, listener, options) { node.addEventListener(type, listener, options); this.eventListeners.push([node, type, listener, options]); } clearEventListeners() { for (const [node, type, listener, options] of this.eventListeners) { node.removeEventListener(type, listener, options); } this.eventListeners = []; } async updateOptions() { this.options = await apiOptionsGet(this.getOptionsContext()); this.setEnabled(this.options.general.enable); await this.popup.setOptions(this.options); } async popupTimerWait() { const delay = this.options.scanning.delay; const promise = promiseTimeout(delay, true); this.popupTimerPromise = promise; try { return await promise; } finally { if (this.popupTimerPromise === promise) { this.popupTimerPromise = null; } } } popupTimerClear() { if (this.popupTimerPromise !== null) { this.popupTimerPromise.resolve(false); this.popupTimerPromise = null; } } async searchAt(x, y, cause) { try { this.popupTimerClear(); if (this.pendingLookup || await this.popup.containsPoint(x, y)) { return; } const textSource = docRangeFromPoint(x, y, this.options); if (this.textSourceCurrent !== null && this.textSourceCurrent.equals(textSource)) { return; } try { await this.searchSource(textSource, cause); } finally { if (textSource !== null) { textSource.cleanup(); } } } catch (e) { this.onError(e); } } async searchSource(textSource, cause) { let results = null; try { this.pendingLookup = true; if (textSource !== null) { results = ( await this.findTerms(textSource) || await this.findKanji(textSource) ); if (results !== null) { const focus = (cause === 'mouse'); this.showContent(textSource, focus, results.definitions, results.type); } } } catch (e) { if (window.yomichan_orphaned) { if (textSource !== null && this.options.scanning.modifier !== 'none') { this.lastShowPromise = this.popup.showContent( textSource.getRect(), textSource.getWritingMode(), 'orphaned' ); } } else { this.onError(e); } } finally { if (results === null && this.options.scanning.autoHideResults) { this.searchClear(true); } this.pendingLookup = false; } return results; } showContent(textSource, focus, definitions, type) { const sentence = docSentenceExtract(textSource, this.options.anki.sentenceExt); const url = window.location.href; this.lastShowPromise = this.popup.showContent( textSource.getRect(), textSource.getWritingMode(), type, {definitions, context: {sentence, url, focus}} ); this.textSourceCurrent = textSource; if (this.options.scanning.selectText) { textSource.select(); } } async findTerms(textSource) { this.setTextSourceScanLength(textSource, this.options.scanning.length); const searchText = textSource.text(); if (searchText.length === 0) { return null; } const {definitions, length} = await apiTermsFind(searchText, {}, this.getOptionsContext()); if (definitions.length === 0) { return null; } textSource.setEndOffset(length); return {definitions, type: 'terms'}; } async findKanji(textSource) { this.setTextSourceScanLength(textSource, 1); const searchText = textSource.text(); if (searchText.length === 0) { return null; } const definitions = await apiKanjiFind(searchText, this.getOptionsContext()); if (definitions.length === 0) { return null; } return {definitions, type: 'kanji'}; } searchClear(changeFocus) { this.popup.hide(changeFocus); this.popup.clearAutoPlayTimer(); if (this.textSourceCurrent !== null) { if (this.options.scanning.selectText) { this.textSourceCurrent.deselect(); } this.textSourceCurrent = null; } } getIndexOfTouch(touchList, identifier) { for (let i in touchList) { let t = touchList[i]; if (t.identifier === identifier) { return i; } } return -1; } static selectionContainsPoint(selection, x, y) { for (let i = 0; i < selection.rangeCount; ++i) { const range = selection.getRangeAt(i); for (const rect of range.getClientRects()) { if (x >= rect.left && x <= rect.right && y >= rect.top && y <= rect.bottom) { return true; } } } return false; } setTextSourceScanLength(textSource, length) { textSource.setEndOffset(length); if (this.ignoreNodes === null || !textSource.range) { return; } length = textSource.text().length; while (textSource.range && length > 0) { const nodes = TextSourceRange.getNodesInRange(textSource.range); if (!TextSourceRange.anyNodeMatchesSelector(nodes, this.ignoreNodes)) { break; } --length; textSource.setEndOffset(length); } } getOptionsContext() { this.optionsContext.url = this.popup.url; return this.optionsContext; } static isScanningModifierPressed(scanningModifier, mouseEvent) { switch (scanningModifier) { case 'alt': return mouseEvent.altKey; case 'ctrl': return mouseEvent.ctrlKey; case 'shift': return mouseEvent.shiftKey; case 'none': return true; default: return false; } } static isMouseButton(button, mouseEvent) { switch (mouseEvent.type) { case 'mouseup': case 'mousedown': case 'click': return Frontend.isMouseButtonPressed(button, mouseEvent); default: return Frontend.isMouseButtonDown(button, mouseEvent); } } static isMouseButtonPressed(button, mouseEvent) { const mouseEventButton = mouseEvent.button; switch (button) { case 'primary': return mouseEventButton === 0; case 'secondary': return mouseEventButton === 2; case 'auxiliary': return mouseEventButton === 1; default: return false; } } static isMouseButtonDown(button, mouseEvent) { const mouseEventButtons = mouseEvent.buttons; switch (button) { case 'primary': return (mouseEventButtons & 0x1) !== 0x0; case 'secondary': return (mouseEventButtons & 0x2) !== 0x0; case 'auxiliary': return (mouseEventButtons & 0x4) !== 0x0; default: return false; } } } Frontend.windowMessageHandlers = { popupClose: (self) => { self.searchClear(true); }, selectionCopy: () => { document.execCommand('copy'); } }; Frontend.runtimeMessageHandlers = { optionsUpdate: (self) => { self.updateOptions(); }, popupSetVisibleOverride: (self, {visible}) => { self.popup.setVisibleOverride(visible); }, getUrl: () => { return {url: window.location.href}; } };