/* * Copyright (C) 2019-2022 Yomichan Authors * * 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 <https://www.gnu.org/licenses/>. */ /* global * FrameOffsetForwarder * Popup * PopupProxy * PopupWindow */ /** * A class which is used to generate and manage popups. */ class PopupFactory { /** * Creates a new instance. * @param {number} frameId The frame ID of the host frame. */ constructor(frameId) { this._frameId = frameId; this._frameOffsetForwarder = new FrameOffsetForwarder(frameId); this._popups = new Map(); this._allPopupVisibilityTokenMap = new Map(); } /** * Prepares the instance for use. */ prepare() { this._frameOffsetForwarder.prepare(); yomichan.crossFrame.registerHandlers([ ['PopupFactory.getOrCreatePopup', {async: true, handler: this._onApiGetOrCreatePopup.bind(this)}], ['PopupFactory.setOptionsContext', {async: true, handler: this._onApiSetOptionsContext.bind(this)}], ['PopupFactory.hide', {async: false, handler: this._onApiHide.bind(this)}], ['PopupFactory.isVisible', {async: true, handler: this._onApiIsVisibleAsync.bind(this)}], ['PopupFactory.setVisibleOverride', {async: true, handler: this._onApiSetVisibleOverride.bind(this)}], ['PopupFactory.clearVisibleOverride', {async: true, handler: this._onApiClearVisibleOverride.bind(this)}], ['PopupFactory.containsPoint', {async: true, handler: this._onApiContainsPoint.bind(this)}], ['PopupFactory.showContent', {async: true, handler: this._onApiShowContent.bind(this)}], ['PopupFactory.setCustomCss', {async: false, handler: this._onApiSetCustomCss.bind(this)}], ['PopupFactory.clearAutoPlayTimer', {async: false, handler: this._onApiClearAutoPlayTimer.bind(this)}], ['PopupFactory.setContentScale', {async: false, handler: this._onApiSetContentScale.bind(this)}], ['PopupFactory.updateTheme', {async: false, handler: this._onApiUpdateTheme.bind(this)}], ['PopupFactory.setCustomOuterCss', {async: false, handler: this._onApiSetCustomOuterCss.bind(this)}], ['PopupFactory.getFrameSize', {async: true, handler: this._onApiGetFrameSize.bind(this)}], ['PopupFactory.setFrameSize', {async: true, handler: this._onApiSetFrameSize.bind(this)}] ]); } /** * Gets or creates a popup based on a set of parameters * @param {object} details * @param {?number} [details.frameId] The ID of the frame that should host the popup. * @param {?string} [details.id] A specific ID used to find an existing popup, or to assign to the new popup. * @param {?string} [details.parentPopupId] The ID of the parent popup. * @param {?number} [details.depth] A specific depth value to assign to the popup. * @param {boolean} [details.popupWindow] Whether or not a separate popup window should be used, rather than an iframe. * @param {boolean} [details.childrenSupported] Whether or not the popup is able to show child popups. */ async getOrCreatePopup({ frameId=null, id=null, parentPopupId=null, depth=null, popupWindow=false, childrenSupported=false }) { // Find by existing id if (id !== null) { const popup = this._popups.get(id); if (typeof popup !== 'undefined') { return popup; } } // Find by existing parent id let parent = null; if (parentPopupId !== null) { parent = this._popups.get(parentPopupId); if (typeof parent !== 'undefined') { const popup = parent.child; if (popup !== null) { return popup; } } else { parent = null; } } // Depth if (parent !== null) { if (depth !== null) { throw new Error('Depth cannot be set when parent exists'); } depth = parent.depth + 1; } else if (depth === null) { depth = 0; } if (popupWindow) { // New unique id if (id === null) { id = generateId(16); } const popup = new PopupWindow({ id, depth, frameId: this._frameId }); this._popups.set(id, popup); return popup; } else if (frameId === this._frameId) { // New unique id if (id === null) { id = generateId(16); } const popup = new Popup({ id, depth, frameId: this._frameId, childrenSupported }); if (parent !== null) { if (parent.child !== null) { throw new Error('Parent popup already has a child'); } popup.parent = parent; parent.child = popup; } this._popups.set(id, popup); popup.prepare(); return popup; } else { if (frameId === null) { throw new Error('Invalid frameId'); } const useFrameOffsetForwarder = (parentPopupId === null); ({id, depth, frameId} = await yomichan.crossFrame.invoke(frameId, 'PopupFactory.getOrCreatePopup', { id, parentPopupId, frameId, childrenSupported })); const popup = new PopupProxy({ id, depth, frameId, frameOffsetForwarder: useFrameOffsetForwarder ? this._frameOffsetForwarder : null }); this._popups.set(id, popup); return popup; } } /** * Force all popups to have a specific visibility value. * @param {boolean} value Whether or not the popups should be visible. * @param {number} priority The priority of the override. * @returns {string} A token which can be passed to clearAllVisibleOverride. * @throws An exception is thrown if any popup fails to have its visibiltiy overridden. */ async setAllVisibleOverride(value, priority) { const promises = []; const errors = []; for (const popup of this._popups.values()) { const promise = popup.setVisibleOverride(value, priority) .then( (token) => ({popup, token}), (error) => { errors.push(error); return null; } ); promises.push(promise); } const results = (await Promise.all(promises)).filter(({token}) => token !== null); if (errors.length === 0) { const token = generateId(16); this._allPopupVisibilityTokenMap.set(token, results); return token; } // Revert on error await this._revertPopupVisibilityOverrides(results); throw errors[0]; } /** * Clears a visibility override that was generated by `setAllVisibleOverride`. * @param {string} token The token returned from `setAllVisibleOverride`. * @returns {boolean} `true` if the override existed and was removed, `false` otherwise. */ async clearAllVisibleOverride(token) { const results = this._allPopupVisibilityTokenMap.get(token); if (typeof results === 'undefined') { return false; } this._allPopupVisibilityTokenMap.delete(token); await this._revertPopupVisibilityOverrides(results); return true; } // API message handlers async _onApiGetOrCreatePopup(details) { const popup = await this.getOrCreatePopup(details); return { id: popup.id, depth: popup.depth, frameId: popup.frameId }; } async _onApiSetOptionsContext({id, optionsContext}) { const popup = this._getPopup(id); return await popup.setOptionsContext(optionsContext); } _onApiHide({id, changeFocus}) { const popup = this._getPopup(id); return popup.hide(changeFocus); } async _onApiIsVisibleAsync({id}) { const popup = this._getPopup(id); return await popup.isVisible(); } async _onApiSetVisibleOverride({id, value, priority}) { const popup = this._getPopup(id); return await popup.setVisibleOverride(value, priority); } async _onApiClearVisibleOverride({id, token}) { const popup = this._getPopup(id); return await popup.clearVisibleOverride(token); } async _onApiContainsPoint({id, x, y}) { const popup = this._getPopup(id); const offset = this._getPopupOffset(popup); x += offset.x; y += offset.y; return await popup.containsPoint(x, y); } async _onApiShowContent({id, details, displayDetails}) { const popup = this._getPopup(id); if (!this._popupCanShow(popup)) { return; } const offset = this._getPopupOffset(popup); const {sourceRects} = details; for (const sourceRect of sourceRects) { sourceRect.left += offset.x; sourceRect.top += offset.y; sourceRect.right += offset.x; sourceRect.bottom += offset.y; } return await popup.showContent(details, displayDetails); } _onApiSetCustomCss({id, css}) { const popup = this._getPopup(id); return popup.setCustomCss(css); } _onApiClearAutoPlayTimer({id}) { const popup = this._getPopup(id); return popup.clearAutoPlayTimer(); } _onApiSetContentScale({id, scale}) { const popup = this._getPopup(id); return popup.setContentScale(scale); } _onApiUpdateTheme({id}) { const popup = this._getPopup(id); return popup.updateTheme(); } _onApiSetCustomOuterCss({id, css, useWebExtensionApi}) { const popup = this._getPopup(id); return popup.setCustomOuterCss(css, useWebExtensionApi); } async _onApiGetFrameSize({id}) { const popup = this._getPopup(id); return await popup.getFrameSize(); } async _onApiSetFrameSize({id, width, height}) { const popup = this._getPopup(id); return await popup.setFrameSize(width, height); } // Private functions _getPopup(id) { const popup = this._popups.get(id); if (typeof popup === 'undefined') { throw new Error(`Invalid popup ID ${id}`); } return popup; } _getPopupOffset(popup) { const {parent} = popup; if (parent !== null) { const popupRect = parent.getFrameRect(); if (popupRect.valid) { return {x: popupRect.left, y: popupRect.top}; } } return {x: 0, y: 0}; } _popupCanShow(popup) { const parent = popup.parent; return parent === null || parent.isVisibleSync(); } async _revertPopupVisibilityOverrides(overrides) { const promises = []; for (const value of overrides) { if (value === null) { continue; } const {popup, token} = value; const promise = popup.clearVisibleOverride(token) .then( (v) => v, () => false ); promises.push(promise); } return await Promise.all(promises); } }