yomichan/ext/js/app/popup-proxy.js
toasted-nutbread 005f9658d9
Action handler name disambiguation (#2018)
* Disambiguate PopupFactory action handlers

* Update HotkeyHandler action names

* Disambiguate Frontend action handlers

* Disambiguate Display action handlers

* Disambiguate PopupPreviewFrame action handlers

* Disambiguate Yomichan action handlers

* Disambiguate Frontend action handlers

* Disambiguate Display action handlers

* Disambiguate SearchDisplayController action handlers
2021-11-21 15:54:58 -05:00

338 lines
11 KiB
JavaScript

/*
* Copyright (C) 2019-2021 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
* @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._frameOffset = [0, 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
* @throws 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} value
* @throws Throws an error, since this class doesn't support children.
*/
set child(value) {
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, y] = this._applyFrameOffset(x, y);
}
return await this._invokeSafe('PopupFactory.containsPoint', {id: this._id, x, y}, false);
}
/**
* Shows and updates the positioning and content of the popup.
* @param {{optionsContext: object, elementRect: {x: number, y: number, width: number, height: number}, writingMode: string}} details Settings for the outer popup.
* @param {object} displayDetails The details parameter passed to `Display.setContent`; see that function for details.
* @returns {Promise<void>}
*/
async showContent(details, displayDetails) {
const {elementRect} = details;
if (typeof elementRect !== 'undefined' && this._frameOffsetForwarder !== null) {
await this._updateFrameOffset();
[elementRect.x, elementRect.y] = this._applyFrameOffset(elementRect.x, elementRect.y);
}
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.
* @returns {boolean} `true` if the popup is visible, `false` otherwise.
* @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 {{x: number, y: number, width: number, height: number, valid: boolean}} The rect.
* `valid` is `false` for `PopupProxy`, since the DOM node is hosted in a different frame.
*/
getFrameRect() {
return {x: 0, y: 0, width: 0, height: 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;
this._frameOffset = offset !== null ? offset : [0, 0];
if (offset === null) {
this.trigger('offsetNotFound');
return;
}
this._frameOffsetUpdatedAt = now;
} catch (e) {
log.error(e);
} finally {
this._frameOffsetPromise = null;
}
}
_applyFrameOffset(x, y) {
const [offsetX, offsetY] = this._frameOffset;
return [x + offsetX, y + offsetY];
}
}