522 lines
15 KiB
JavaScript
522 lines
15 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.popupTimer = null;
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this.textSourceLast = 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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};
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this.primaryTouchIdentifier = null;
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this.contextMenuChecking = false;
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this.contextMenuPrevent = false;
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this.contextMenuPreviousRange = null;
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this.mouseDownPrevent = false;
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this.clickPrevent = false;
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this.scrollPrevent = false;
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}
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static create() {
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const initializationData = window.frontendInitializationData;
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const isNested = (initializationData !== null && typeof initializationData === 'object');
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const {id, depth, parentFrameId, ignoreNodes} = isNested ? initializationData : {};
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const popup = isNested ? new PopupProxy(depth + 1, id, parentFrameId) : PopupProxyHost.instance.createPopup(null);
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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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this.options = await apiOptionsGet(this.optionsContext);
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window.addEventListener('message', this.onFrameMessage.bind(this));
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window.addEventListener('mousedown', this.onMouseDown.bind(this));
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window.addEventListener('mousemove', this.onMouseMove.bind(this));
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window.addEventListener('mouseover', this.onMouseOver.bind(this));
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window.addEventListener('mouseout', this.onMouseOut.bind(this));
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window.addEventListener('resize', this.onResize.bind(this));
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if (this.options.scanning.touchInputEnabled) {
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window.addEventListener('click', this.onClick.bind(this));
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window.addEventListener('touchstart', this.onTouchStart.bind(this));
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window.addEventListener('touchend', this.onTouchEnd.bind(this));
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window.addEventListener('touchcancel', this.onTouchCancel.bind(this));
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window.addEventListener('touchmove', this.onTouchMove.bind(this), {passive: false});
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window.addEventListener('contextmenu', this.onContextMenu.bind(this));
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}
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chrome.runtime.onMessage.addListener(this.onBgMessage.bind(this));
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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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onMouseOver(e) {
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if (e.target === this.popup.container && this.popupTimer !== null) {
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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 (
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this.pendingLookup ||
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!this.options.general.enable ||
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(e.buttons & 0x1) !== 0x0 // Left mouse button
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) {
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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 && (e.buttons & 0x4) !== 0x0) // Middle mouse button
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)) {
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return;
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}
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const search = async () => {
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try {
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await this.searchAt(e.clientX, e.clientY, 'mouse');
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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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if (scanningModifier === 'none') {
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this.popupTimerSet(search);
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} else {
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search();
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}
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}
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onMouseDown(e) {
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if (this.mouseDownPrevent) {
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this.setMouseDownPrevent(false, false);
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this.setClickPrevent(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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this.popupTimerClear();
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this.searchClear();
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}
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onMouseOut(e) {
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this.popupTimerClear();
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}
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onFrameMessage(e) {
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const handlers = {
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popupClose: () => {
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this.searchClear();
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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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const handler = handlers[e.data];
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if (handler) {
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handler();
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}
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}
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onResize() {
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this.searchClear();
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}
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onClick(e) {
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if (this.clickPrevent) {
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this.setClickPrevent(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 && this.getIndexOfTouch(e.touches, this.primaryTouchIdentifier) >= 0) {
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return;
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}
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let touch = this.getPrimaryTouch(e.changedTouches);
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if (this.selectionContainsPoint(window.getSelection(), touch.clientX, touch.clientY)) {
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touch = null;
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}
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this.setPrimaryTouch(touch);
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}
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onTouchEnd(e) {
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if (this.primaryTouchIdentifier === null) {
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return;
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}
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if (this.getIndexOfTouch(e.changedTouches, this.primaryTouchIdentifier) < 0) {
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return;
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}
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this.setPrimaryTouch(this.getPrimaryTouch(this.excludeTouches(e.touches, e.changedTouches)));
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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.scrollPrevent || !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 touch = touches[index];
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this.searchFromTouch(touch.clientX, touch.clientY, 'touchMove');
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e.preventDefault(); // Disable scroll
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}
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onContextMenu(e) {
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if (this.contextMenuPrevent) {
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this.setContextMenuPrevent(false, 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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onAfterSearch(newRange, cause, searched, success) {
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if (cause === 'mouse') {
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return;
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}
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if (
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!this.contextMenuChecking ||
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(this.contextMenuPreviousRange === null ? newRange === null : this.contextMenuPreviousRange.equals(newRange))) {
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return;
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}
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if (cause === 'touchStart' && newRange !== null) {
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this.scrollPrevent = true;
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}
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this.setContextMenuPrevent(true, false);
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this.setMouseDownPrevent(true, false);
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this.contextMenuChecking = false;
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}
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onBgMessage({action, params}, sender, callback) {
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const handlers = {
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optionsUpdate: () => {
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this.updateOptions();
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},
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popupSetVisible: ({visible}) => {
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this.popup.setVisible(visible);
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}
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};
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const handler = handlers[action];
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if (handler) {
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handler(params);
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callback();
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}
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}
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onError(error) {
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console.log(error);
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}
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async updateOptions() {
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this.options = await apiOptionsGet(this.optionsContext);
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if (!this.options.enable) {
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this.searchClear();
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}
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}
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popupTimerSet(callback) {
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this.popupTimer = window.setTimeout(callback, this.options.scanning.delay);
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}
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popupTimerClear() {
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if (this.popupTimer !== null) {
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window.clearTimeout(this.popupTimer);
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this.popupTimer = null;
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}
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}
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async searchAt(x, y, cause) {
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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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let hideResults = textSource === null;
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let searched = false;
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let success = false;
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try {
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if (!hideResults && (!this.textSourceLast || !this.textSourceLast.equals(textSource))) {
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searched = true;
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this.pendingLookup = true;
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const focus = (cause === 'mouse');
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hideResults = !await this.searchTerms(textSource, focus) && !await this.searchKanji(textSource, focus);
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success = true;
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}
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} catch (e) {
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if (window.yomichan_orphaned) {
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if (textSource && this.options.scanning.modifier !== 'none') {
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this.popup.showOrphaned(
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textSource.getRect(),
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textSource.getWritingMode(),
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this.options
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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 (textSource !== null) {
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textSource.cleanup();
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}
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if (hideResults && this.options.scanning.autoHideResults) {
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this.searchClear();
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}
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this.pendingLookup = false;
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this.onAfterSearch(this.textSourceLast, cause, searched, success);
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}
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}
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async searchTerms(textSource, focus) {
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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) {
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return;
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}
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const {definitions, length} = await apiTermsFind(searchText, this.optionsContext);
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if (definitions.length === 0) {
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return false;
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}
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textSource.setEndOffset(length);
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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.popup.termsShow(
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textSource.getRect(),
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textSource.getWritingMode(),
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definitions,
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this.options,
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{sentence, url, focus}
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);
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this.textSourceLast = textSource;
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if (this.options.scanning.selectText) {
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textSource.select();
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}
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return true;
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}
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async searchKanji(textSource, focus) {
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this.setTextSourceScanLength(textSource, 1);
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const searchText = textSource.text();
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if (searchText.length === 0) {
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return;
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}
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const definitions = await apiKanjiFind(searchText, this.optionsContext);
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if (definitions.length === 0) {
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return false;
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}
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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.popup.kanjiShow(
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textSource.getRect(),
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textSource.getWritingMode(),
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definitions,
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this.options,
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{sentence, url, focus}
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);
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this.textSourceLast = textSource;
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if (this.options.scanning.selectText) {
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textSource.select();
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}
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return true;
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}
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searchClear() {
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this.popup.hide();
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this.popup.clearAutoPlayTimer();
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if (this.options.scanning.selectText && this.textSourceLast) {
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this.textSourceLast.deselect();
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}
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this.textSourceLast = null;
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}
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getPrimaryTouch(touchList) {
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return touchList.length > 0 ? touchList[0] : null;
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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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excludeTouches(touchList, excludeTouchList) {
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const result = [];
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for (let r of touchList) {
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if (this.getIndexOfTouch(excludeTouchList, r.identifier) < 0) {
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result.push(r);
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}
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}
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return result;
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}
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setPrimaryTouch(touch) {
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if (touch === null) {
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this.primaryTouchIdentifier = null;
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this.contextMenuPreviousRange = null;
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this.contextMenuChecking = false;
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this.scrollPrevent = false;
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this.setContextMenuPrevent(false, true);
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this.setMouseDownPrevent(false, true);
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this.setClickPrevent(false);
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}
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else {
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this.primaryTouchIdentifier = touch.identifier;
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this.contextMenuPreviousRange = this.textSourceLast ? this.textSourceLast.clone() : null;
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this.contextMenuChecking = true;
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this.scrollPrevent = false;
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this.setContextMenuPrevent(false, false);
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this.setMouseDownPrevent(false, false);
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this.setClickPrevent(false);
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this.searchFromTouch(touch.clientX, touch.clientY, 'touchStart');
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}
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}
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setContextMenuPrevent(value, delay) {
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if (!delay) {
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this.contextMenuPrevent = value;
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}
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}
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setMouseDownPrevent(value, delay) {
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if (!delay) {
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this.mouseDownPrevent = value;
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}
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}
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setClickPrevent(value) {
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this.clickPrevent = value;
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}
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searchFromTouch(x, y, cause) {
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this.popupTimerClear();
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if (!this.options.general.enable || this.pendingLookup) {
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return;
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}
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const search = async () => {
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try {
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await this.searchAt(x, y, cause);
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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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search();
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}
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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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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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}
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window.yomichan_frontend = Frontend.create();
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