/* * 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/>. */ /** * This class is a proxy for a Popup that is hosted in a different frame. * It effectively forwards all API calls to the underlying Popup. */ class PopupProxy extends EventDispatcher { /** * Creates a new instance. * @param {object} details Details about how to set up the instance. * @param {string} details.id The ID of the popup. * @param {number} details.depth The depth of the popup. * @param {number} details.frameId The ID of the host frame. * @param {FrameOffsetForwarder} details.frameOffsetForwarder A `FrameOffsetForwarder` instance which is used to determine frame positioning. */ constructor({ id, depth, frameId, frameOffsetForwarder }) { super(); this._id = id; this._depth = depth; this._frameId = frameId; this._frameOffsetForwarder = frameOffsetForwarder; this._frameOffsetX = 0; this._frameOffsetY = 0; this._frameOffsetPromise = null; this._frameOffsetUpdatedAt = null; this._frameOffsetExpireTimeout = 1000; } /** * The ID of the popup. * @type {string} */ get id() { return this._id; } /** * The parent of the popup, which is always `null` for `PopupProxy` instances, * since any potential parent popups are in a different frame. * @type {Popup} */ get parent() { return null; } /** * Attempts to set the parent popup. * @param {Popup} _value The parent to assign. * @throws {Error} Throws an error, since this class doesn't support a direct parent. */ set parent(_value) { throw new Error('Not supported on PopupProxy'); } /** * The popup child popup, which is always null for `PopupProxy` instances, * since any potential child popups are in a different frame. * @type {Popup} */ get child() { return null; } /** * Attempts to set the child popup. * @param {Popup} _child The child to assign. * @throws {Error} Throws an error, since this class doesn't support children. */ set child(_child) { throw new Error('Not supported on PopupProxy'); } /** * The depth of the popup. * @type {numer} */ get depth() { return this._depth; } /** * Gets the content window of the frame. This value is null, * since the window is hosted in a different frame. * @type {Window} */ get frameContentWindow() { return null; } /** * Gets the DOM node that contains the frame. * @type {Element} */ get container() { return null; } /** * Gets the ID of the frame. * @type {number} */ get frameId() { return this._frameId; } /** * Sets the options context for the popup. * @param {object} optionsContext The options context object. * @returns {Promise<void>} */ setOptionsContext(optionsContext) { return this._invokeSafe('PopupFactory.setOptionsContext', {id: this._id, optionsContext}); } /** * Hides the popup. * @param {boolean} changeFocus Whether or not the parent popup or host frame should be focused. * @returns {Promise<void>} */ hide(changeFocus) { return this._invokeSafe('PopupFactory.hide', {id: this._id, changeFocus}); } /** * Returns whether or not the popup is currently visible. * @returns {Promise<boolean>} `true` if the popup is visible, `false` otherwise. */ isVisible() { return this._invokeSafe('PopupFactory.isVisible', {id: this._id}, false); } /** * Force assigns the visibility of the popup. * @param {boolean} value Whether or not the popup should be visible. * @param {number} priority The priority of the override. * @returns {Promise<string?>} A token used which can be passed to `clearVisibleOverride`, * or null if the override wasn't assigned. */ setVisibleOverride(value, priority) { return this._invokeSafe('PopupFactory.setVisibleOverride', {id: this._id, value, priority}, null); } /** * Clears a visibility override that was generated by `setVisibleOverride`. * @param {string} token The token returned from `setVisibleOverride`. * @returns {Promise<boolean>} `true` if the override existed and was removed, `false` otherwise. */ clearVisibleOverride(token) { return this._invokeSafe('PopupFactory.clearVisibleOverride', {id: this._id, token}, false); } /** * Checks whether a point is contained within the popup's rect. * @param {number} x The x coordinate. * @param {number} y The y coordinate. * @returns {Promise<boolean>} `true` if the point is contained within the popup's rect, `false` otherwise. */ async containsPoint(x, y) { if (this._frameOffsetForwarder !== null) { await this._updateFrameOffset(); x += this._frameOffsetX; y += this._frameOffsetY; } return await this._invokeSafe('PopupFactory.containsPoint', {id: this._id, x, y}, false); } /** * Shows and updates the positioning and content of the popup. * @param {Popup.ContentDetails} details Settings for the outer popup. * @param {Display.ContentDetails} displayDetails The details parameter passed to `Display.setContent`. * @returns {Promise<void>} */ async showContent(details, displayDetails) { if (this._frameOffsetForwarder !== null) { const {sourceRects} = details; await this._updateFrameOffset(); for (const sourceRect of sourceRects) { sourceRect.left += this._frameOffsetX; sourceRect.top += this._frameOffsetY; sourceRect.right += this._frameOffsetX; sourceRect.bottom += this._frameOffsetY; } } return await this._invokeSafe('PopupFactory.showContent', {id: this._id, details, displayDetails}); } /** * Sets the custom styles for the popup content. * @param {string} css The CSS rules. * @returns {Promise<void>} */ setCustomCss(css) { return this._invokeSafe('PopupFactory.setCustomCss', {id: this._id, css}); } /** * Stops the audio auto-play timer, if one has started. * @returns {Promise<void>} */ clearAutoPlayTimer() { return this._invokeSafe('PopupFactory.clearAutoPlayTimer', {id: this._id}); } /** * Sets the scaling factor of the popup content. * @param {number} scale The scaling factor. * @returns {Promise<void>} */ setContentScale(scale) { return this._invokeSafe('PopupFactory.setContentScale', {id: this._id, scale}); } /** * Returns whether or not the popup is currently visible, synchronously. * @throws An exception is thrown for `PopupProxy` since it cannot synchronously detect visibility. */ isVisibleSync() { throw new Error('Not supported on PopupProxy'); } /** * Updates the outer theme of the popup. * @returns {Promise<void>} */ updateTheme() { return this._invokeSafe('PopupFactory.updateTheme', {id: this._id}); } /** * Sets the custom styles for the outer popup container. * @param {string} css The CSS rules. * @param {boolean} useWebExtensionApi Whether or not web extension APIs should be used to inject the rules. * When web extension APIs are used, a DOM node is not generated, making it harder to detect the changes. * @returns {Promise<void>} */ setCustomOuterCss(css, useWebExtensionApi) { return this._invokeSafe('PopupFactory.setCustomOuterCss', {id: this._id, css, useWebExtensionApi}); } /** * Gets the rectangle of the DOM frame, synchronously. * @returns {Popup.ValidRect} The rect. * `valid` is `false` for `PopupProxy`, since the DOM node is hosted in a different frame. */ getFrameRect() { return {left: 0, top: 0, right: 0, bottom: 0, valid: false}; } /** * Gets the size of the DOM frame. * @returns {Promise<{width: number, height: number, valid: boolean}>} The size and whether or not it is valid. */ getFrameSize() { return this._invokeSafe('PopupFactory.getFrameSize', {id: this._id}, {width: 0, height: 0, valid: false}); } /** * Sets the size of the DOM frame. * @param {number} width The desired width of the popup. * @param {number} height The desired height of the popup. * @returns {Promise<boolean>} `true` if the size assignment was successful, `false` otherwise. */ setFrameSize(width, height) { return this._invokeSafe('PopupFactory.setFrameSize', {id: this._id, width, height}); } // Private _invoke(action, params={}) { return yomichan.crossFrame.invoke(this._frameId, action, params); } async _invokeSafe(action, params={}, defaultReturnValue) { try { return await this._invoke(action, params); } catch (e) { if (!yomichan.isExtensionUnloaded) { throw e; } return defaultReturnValue; } } async _updateFrameOffset() { const now = Date.now(); const firstRun = this._frameOffsetUpdatedAt === null; const expired = firstRun || this._frameOffsetUpdatedAt < now - this._frameOffsetExpireTimeout; if (this._frameOffsetPromise === null && !expired) { return; } if (this._frameOffsetPromise !== null) { if (firstRun) { await this._frameOffsetPromise; } return; } const promise = this._updateFrameOffsetInner(now); if (firstRun) { await promise; } } async _updateFrameOffsetInner(now) { this._frameOffsetPromise = this._frameOffsetForwarder.getOffset(); try { const offset = await this._frameOffsetPromise; if (offset !== null) { this._frameOffsetX = offset[0]; this._frameOffsetY = offset[1]; } else { this._frameOffsetX = 0; this._frameOffsetY = 0; this.trigger('offsetNotFound'); return; } this._frameOffsetUpdatedAt = now; } catch (e) { log.error(e); } finally { this._frameOffsetPromise = null; } } }