540 lines
16 KiB
JavaScript
540 lines
16 KiB
JavaScript
/*
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* Copyright (C) 2016-2017 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 <http://www.gnu.org/licenses/>.
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*/
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class Frontend {
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constructor(popup, ignoreNodes) {
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this.popup = popup;
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this.popupTimerPromise = null;
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this.textSourceCurrent = null;
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this.pendingLookup = false;
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this.options = null;
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this.ignoreNodes = (Array.isArray(ignoreNodes) && ignoreNodes.length > 0 ? ignoreNodes.join(',') : 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.primaryTouchIdentifier = null;
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this.preventNextContextMenu = false;
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this.preventNextMouseDown = false;
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this.preventNextClick = false;
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this.preventScroll = false;
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this.enabled = false;
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this.eventListeners = [];
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this.isPreparedPromiseResolve = null;
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this.isPreparedPromise = new Promise((resolve) => { this.isPreparedPromiseResolve = resolve; });
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this.lastShowPromise = Promise.resolve();
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}
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static create() {
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const data = window.frontendInitializationData || {};
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const {id, depth=0, parentFrameId, ignoreNodes, url, proxy=false} = data;
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const popup = proxy ? new PopupProxy(depth + 1, id, parentFrameId, url) : PopupProxyHost.instance.createPopup(null, depth);
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const frontend = new Frontend(popup, ignoreNodes);
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frontend.prepare();
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return frontend;
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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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chrome.runtime.onMessage.addListener(this.onRuntimeMessage.bind(this));
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this.isPreparedPromiseResolve();
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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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isPrepared() {
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return this.isPreparedPromise;
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}
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onMouseOver(e) {
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if (e.target === this.popup.container) {
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this.popupTimerClear();
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}
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}
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onMouseMove(e) {
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this.popupTimerClear();
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if (this.pendingLookup || Frontend.isMouseButton('primary', e)) {
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return;
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}
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const scanningOptions = this.options.scanning;
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const scanningModifier = scanningOptions.modifier;
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if (!(
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Frontend.isScanningModifierPressed(scanningModifier, e) ||
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(scanningOptions.middleMouse && Frontend.isMouseButton('auxiliary', e))
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)) {
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return;
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}
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const search = async () => {
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if (scanningModifier === 'none') {
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if (!await this.popupTimerWait()) {
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// Aborted
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return;
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}
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}
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await this.searchAt(e.clientX, e.clientY, 'mouse');
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};
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search();
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}
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onMouseDown(e) {
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if (this.preventNextMouseDown) {
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this.preventNextMouseDown = false;
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this.preventNextClick = true;
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e.preventDefault();
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e.stopPropagation();
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return false;
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}
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if (e.button === 0) {
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this.popupTimerClear();
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this.searchClear(true);
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}
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}
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onMouseOut(e) {
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this.popupTimerClear();
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}
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onClick(e) {
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if (this.preventNextClick) {
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this.preventNextClick = false;
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e.preventDefault();
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e.stopPropagation();
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return false;
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}
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}
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onAuxClick(e) {
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this.preventNextContextMenu = false;
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}
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onContextMenu(e) {
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if (this.preventNextContextMenu) {
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this.preventNextContextMenu = false;
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e.preventDefault();
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e.stopPropagation();
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return false;
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}
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}
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onTouchStart(e) {
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if (this.primaryTouchIdentifier !== null || e.changedTouches.length === 0) {
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return;
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}
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this.preventScroll = false;
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this.preventNextContextMenu = false;
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this.preventNextMouseDown = false;
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this.preventNextClick = false;
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const primaryTouch = e.changedTouches[0];
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if (Frontend.selectionContainsPoint(window.getSelection(), primaryTouch.clientX, primaryTouch.clientY)) {
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return;
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}
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this.primaryTouchIdentifier = primaryTouch.identifier;
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if (this.pendingLookup) {
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return;
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}
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const textSourceCurrentPrevious = this.textSourceCurrent !== null ? this.textSourceCurrent.clone() : null;
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this.searchAt(primaryTouch.clientX, primaryTouch.clientY, 'touchStart')
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.then(() => {
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if (
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this.textSourceCurrent === null ||
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this.textSourceCurrent.equals(textSourceCurrentPrevious)
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) {
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return;
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}
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this.preventScroll = true;
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this.preventNextContextMenu = true;
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this.preventNextMouseDown = true;
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});
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}
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onTouchEnd(e) {
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if (
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this.primaryTouchIdentifier === null ||
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this.getIndexOfTouch(e.changedTouches, this.primaryTouchIdentifier) < 0
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) {
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return;
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}
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this.primaryTouchIdentifier = null;
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this.preventScroll = false;
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this.preventNextClick = false;
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// Don't revert context menu and mouse down prevention,
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// since these events can occur after the touch has ended.
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// this.preventNextContextMenu = false;
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// this.preventNextMouseDown = false;
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}
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onTouchCancel(e) {
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this.onTouchEnd(e);
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}
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onTouchMove(e) {
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if (!this.preventScroll || !e.cancelable || this.primaryTouchIdentifier === null) {
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return;
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}
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const touches = e.changedTouches;
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const index = this.getIndexOfTouch(touches, this.primaryTouchIdentifier);
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if (index < 0) {
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return;
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}
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const primaryTouch = touches[index];
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this.searchAt(primaryTouch.clientX, primaryTouch.clientY, 'touchMove');
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e.preventDefault(); // Disable scroll
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}
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async onResize() {
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if (this.textSourceCurrent !== null && await this.popup.isVisibleAsync()) {
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const textSource = this.textSourceCurrent;
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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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);
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}
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}
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onWindowMessage(e) {
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const action = e.data;
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const handlers = Frontend.windowMessageHandlers;
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if (handlers.hasOwnProperty(action)) {
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const handler = handlers[action];
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handler(this);
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}
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}
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onRuntimeMessage({action, params}, sender, callback) {
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const handlers = Frontend.runtimeMessageHandlers;
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if (handlers.hasOwnProperty(action)) {
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const handler = handlers[action];
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const result = handler(this, params);
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callback(result);
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}
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}
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onError(error) {
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logError(error, false);
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}
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setEnabled(enabled) {
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if (enabled) {
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if (!this.enabled) {
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this.hookEvents();
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this.enabled = true;
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}
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} else {
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if (this.enabled) {
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this.clearEventListeners();
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this.enabled = false;
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}
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this.searchClear(false);
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}
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}
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hookEvents() {
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this.addEventListener(window, 'message', this.onWindowMessage.bind(this));
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this.addEventListener(window, 'mousedown', this.onMouseDown.bind(this));
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this.addEventListener(window, 'mousemove', this.onMouseMove.bind(this));
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this.addEventListener(window, 'mouseover', this.onMouseOver.bind(this));
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this.addEventListener(window, 'mouseout', this.onMouseOut.bind(this));
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this.addEventListener(window, 'resize', this.onResize.bind(this));
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if (this.options.scanning.touchInputEnabled) {
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this.addEventListener(window, 'click', this.onClick.bind(this));
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this.addEventListener(window, 'auxclick', this.onAuxClick.bind(this));
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this.addEventListener(window, 'touchstart', this.onTouchStart.bind(this));
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this.addEventListener(window, 'touchend', this.onTouchEnd.bind(this));
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this.addEventListener(window, 'touchcancel', this.onTouchCancel.bind(this));
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this.addEventListener(window, 'touchmove', this.onTouchMove.bind(this), {passive: false});
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this.addEventListener(window, 'contextmenu', this.onContextMenu.bind(this));
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}
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}
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addEventListener(node, type, listener, options) {
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node.addEventListener(type, listener, options);
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this.eventListeners.push([node, type, listener, options]);
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}
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clearEventListeners() {
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for (const [node, type, listener, options] of this.eventListeners) {
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node.removeEventListener(type, listener, options);
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}
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this.eventListeners = [];
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}
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async updateOptions() {
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this.options = await apiOptionsGet(this.getOptionsContext());
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this.setEnabled(this.options.general.enable);
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await this.popup.setOptions(this.options);
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}
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async popupTimerWait() {
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const delay = this.options.scanning.delay;
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this.popupTimerPromise = promiseTimeout(delay, true);
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try {
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return await this.popupTimerPromise;
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} finally {
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this.popupTimerPromise = null;
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}
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}
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popupTimerClear() {
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if (this.popupTimerPromise !== null) {
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this.popupTimerPromise.resolve(false);
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}
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}
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async searchAt(x, y, cause) {
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try {
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this.popupTimerClear();
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if (this.pendingLookup || await this.popup.containsPoint(x, y)) {
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return;
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}
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const textSource = docRangeFromPoint(x, y, this.options);
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if (this.textSourceCurrent !== null && this.textSourceCurrent.equals(textSource)) {
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return;
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}
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try {
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await this.searchSource(textSource, cause);
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} finally {
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if (textSource !== null) {
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textSource.cleanup();
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}
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}
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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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async searchSource(textSource, cause) {
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let results = null;
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try {
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this.pendingLookup = true;
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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 (window.yomichan_orphaned) {
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if (textSource !== null && this.options.scanning.modifier !== 'none') {
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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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'orphaned'
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);
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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.searchClear(true);
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}
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this.pendingLookup = false;
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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.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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{definitions, context: {sentence, url, focus}}
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);
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this.textSourceCurrent = textSource;
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if (this.options.scanning.selectText) {
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textSource.select();
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}
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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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searchClear(changeFocus) {
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this.popup.hide(changeFocus);
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this.popup.clearAutoPlayTimer();
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if (this.textSourceCurrent !== null) {
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if (this.options.scanning.selectText) {
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this.textSourceCurrent.deselect();
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}
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this.textSourceCurrent = null;
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}
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}
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getIndexOfTouch(touchList, identifier) {
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for (let i in touchList) {
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let t = touchList[i];
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if (t.identifier === identifier) {
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return i;
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}
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}
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return -1;
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}
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static selectionContainsPoint(selection, x, y) {
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for (let i = 0; i < selection.rangeCount; ++i) {
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const range = selection.getRangeAt(i);
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for (const rect of range.getClientRects()) {
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if (x >= rect.left && x <= rect.right && y >= rect.top && y <= rect.bottom) {
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return true;
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}
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}
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}
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return false;
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}
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setTextSourceScanLength(textSource, length) {
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textSource.setEndOffset(length);
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if (this.ignoreNodes === null || !textSource.range) {
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return;
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}
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length = textSource.text().length;
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while (textSource.range && length > 0) {
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const nodes = TextSourceRange.getNodesInRange(textSource.range);
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if (!TextSourceRange.anyNodeMatchesSelector(nodes, this.ignoreNodes)) {
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break;
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}
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--length;
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textSource.setEndOffset(length);
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}
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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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static isScanningModifierPressed(scanningModifier, mouseEvent) {
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switch (scanningModifier) {
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case 'alt': return mouseEvent.altKey;
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case 'ctrl': return mouseEvent.ctrlKey;
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case 'shift': return mouseEvent.shiftKey;
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case 'none': return true;
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default: return false;
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}
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}
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static isMouseButton(button, mouseEvent) {
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if (['mouseup', 'mousedown', 'click'].includes(mouseEvent.type)) {
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switch (button) {
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case 'primary': return mouseEvent.button === 0;
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case 'secondary': return mouseEvent.button === 2;
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case 'auxiliary': return mouseEvent.button === 1;
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default: return false;
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}
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}
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switch (button) {
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case 'primary': return (mouseEvent.buttons & 0x1) !== 0x0;
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case 'secondary': return (mouseEvent.buttons & 0x2) !== 0x0;
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case 'auxiliary': return (mouseEvent.buttons & 0x4) !== 0x0;
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default: return false;
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}
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}
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}
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Frontend.windowMessageHandlers = {
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popupClose: (self) => {
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self.searchClear(true);
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},
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selectionCopy: () => {
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document.execCommand('copy');
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}
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};
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Frontend.runtimeMessageHandlers = {
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optionsUpdate: (self) => {
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self.updateOptions();
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},
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popupSetVisibleOverride: (self, {visible}) => {
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self.popup.setVisibleOverride(visible);
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},
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getUrl: () => {
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return {url: window.location.href};
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}
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};
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