535 lines
17 KiB
JavaScript
535 lines
17 KiB
JavaScript
/*
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* Copyright (C) 2016-2020 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 <https://www.gnu.org/licenses/>.
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*/
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/*global apiInjectStylesheet*/
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class Popup {
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constructor(id, depth, frameIdPromise) {
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this._id = id;
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this._depth = depth;
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this._frameIdPromise = frameIdPromise;
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this._frameId = null;
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this._parent = null;
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this._child = null;
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this._childrenSupported = true;
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this._injectPromise = null;
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this._visible = false;
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this._visibleOverride = null;
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this._options = null;
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this._stylesheetInjectedViaApi = false;
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this._contentScale = 1.0;
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this._containerSizeContentScale = null;
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this._container = document.createElement('iframe');
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this._container.className = 'yomichan-float';
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this._container.addEventListener('mousedown', (e) => e.stopPropagation());
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this._container.addEventListener('scroll', (e) => e.stopPropagation());
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this._container.setAttribute('src', chrome.runtime.getURL('/fg/float.html'));
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this._container.style.width = '0px';
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this._container.style.height = '0px';
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this._updateVisibility();
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}
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// Public properties
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get parent() {
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return this._parent;
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}
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get depth() {
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return this._depth;
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}
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get url() {
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return window.location.href;
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}
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// Public functions
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isProxy() {
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return false;
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}
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async setOptions(options) {
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this._options = options;
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this.updateTheme();
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}
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hide(changeFocus) {
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if (!this.isVisibleSync()) {
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return;
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}
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this._setVisible(false);
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if (this._child !== null) {
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this._child.hide(false);
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}
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if (changeFocus) {
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this._focusParent();
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}
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}
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async isVisible() {
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return this.isVisibleSync();
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}
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setVisibleOverride(visible) {
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this._visibleOverride = visible;
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this._updateVisibility();
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}
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async containsPoint(x, y) {
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for (let popup = this; popup !== null && popup.isVisibleSync(); popup = popup._child) {
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const rect = popup._container.getBoundingClientRect();
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if (x >= rect.left && y >= rect.top && x < rect.right && y < rect.bottom) {
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return true;
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}
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}
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return false;
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}
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async showContent(elementRect, writingMode, type=null, details=null) {
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if (this._options === null) { throw new Error('Options not assigned'); }
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await this._show(elementRect, writingMode);
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if (type === null) { return; }
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this._invokeApi('setContent', {type, details});
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}
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async setCustomCss(css) {
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this._invokeApi('setCustomCss', {css});
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}
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clearAutoPlayTimer() {
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this._invokeApi('clearAutoPlayTimer');
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}
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setContentScale(scale) {
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this._contentScale = scale;
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this._invokeApi('setContentScale', {scale});
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}
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setDisplayInitialized() {
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throw new Error('Override me');
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}
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// Popup-only public functions
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setParent(parent) {
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if (parent === null) {
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throw new Error('Cannot set popup parent to null');
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}
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if (this._parent !== null) {
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throw new Error('Popup already has a parent');
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}
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if (parent._child !== null) {
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throw new Error('Cannot parent popup to another popup which already has a child');
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}
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this._parent = parent;
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parent._child = this;
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}
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isVisibleSync() {
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return (this._visibleOverride !== null ? this._visibleOverride : this._visible);
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}
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updateTheme() {
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this._container.dataset.yomichanTheme = this._options.general.popupOuterTheme;
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this._container.dataset.yomichanSiteColor = this._getSiteColor();
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}
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async setCustomOuterCss(css, injectDirectly) {
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// Cannot repeatedly inject stylesheets using web extension APIs since there is no way to remove them.
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if (this._stylesheetInjectedViaApi) { return; }
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if (injectDirectly || Popup._isOnExtensionPage()) {
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Popup.injectOuterStylesheet(css);
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} else {
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if (!css) { return; }
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try {
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await apiInjectStylesheet(css);
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this._stylesheetInjectedViaApi = true;
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} catch (e) {
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// NOP
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}
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}
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}
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setChildrenSupported(value) {
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this._childrenSupported = value;
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}
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getContainer() {
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return this._container;
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}
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getContainerRect() {
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return this._container.getBoundingClientRect();
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}
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static injectOuterStylesheet(css) {
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if (Popup.outerStylesheet === null) {
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if (!css) { return; }
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Popup.outerStylesheet = document.createElement('style');
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Popup.outerStylesheet.id = 'yomichan-popup-outer-stylesheet';
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}
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const outerStylesheet = Popup.outerStylesheet;
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if (css) {
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outerStylesheet.textContent = css;
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const par = document.head;
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if (par && outerStylesheet.parentNode !== par) {
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par.appendChild(outerStylesheet);
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}
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} else {
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outerStylesheet.textContent = '';
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}
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}
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// Private functions
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_inject() {
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if (this._injectPromise === null) {
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this._injectPromise = this._createInjectPromise();
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}
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return this._injectPromise;
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}
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async _createInjectPromise() {
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try {
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const {frameId} = await this._frameIdPromise;
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if (typeof frameId === 'number') {
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this._frameId = frameId;
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}
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} catch (e) {
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// NOP
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}
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return new Promise((resolve) => {
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const parentFrameId = (typeof this._frameId === 'number' ? this._frameId : null);
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this._container.addEventListener('load', () => {
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this._invokeApi('initialize', {
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options: this._options,
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popupInfo: {
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id: this._id,
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depth: this._depth,
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parentFrameId
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},
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url: this.url,
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childrenSupported: this._childrenSupported,
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scale: this._contentScale
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});
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this.setDisplayInitialized = resolve;
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});
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this._observeFullscreen();
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this._onFullscreenChanged();
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this.setCustomOuterCss(this._options.general.customPopupOuterCss, false);
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});
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}
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async _show(elementRect, writingMode) {
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await this._inject();
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const optionsGeneral = this._options.general;
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const container = this._container;
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const containerRect = container.getBoundingClientRect();
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const getPosition = (
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writingMode === 'horizontal-tb' || optionsGeneral.popupVerticalTextPosition === 'default' ?
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Popup._getPositionForHorizontalText :
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Popup._getPositionForVerticalText
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);
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const viewport = Popup._getViewport(optionsGeneral.popupScaleRelativeToVisualViewport);
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const scale = this._contentScale;
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const scaleRatio = this._containerSizeContentScale === null ? 1.0 : scale / this._containerSizeContentScale;
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this._containerSizeContentScale = scale;
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let [x, y, width, height, below] = getPosition(
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elementRect,
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Math.max(containerRect.width * scaleRatio, optionsGeneral.popupWidth * scale),
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Math.max(containerRect.height * scaleRatio, optionsGeneral.popupHeight * scale),
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viewport,
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scale,
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optionsGeneral,
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writingMode
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);
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const fullWidth = (optionsGeneral.popupDisplayMode === 'full-width');
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container.classList.toggle('yomichan-float-full-width', fullWidth);
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container.classList.toggle('yomichan-float-above', !below);
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if (optionsGeneral.popupDisplayMode === 'full-width') {
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x = viewport.left;
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y = below ? viewport.bottom - height : viewport.top;
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width = viewport.right - viewport.left;
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}
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container.style.left = `${x}px`;
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container.style.top = `${y}px`;
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container.style.width = `${width}px`;
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container.style.height = `${height}px`;
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this._setVisible(true);
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if (this._child !== null) {
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this._child.hide(true);
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}
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}
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_setVisible(visible) {
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this._visible = visible;
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this._updateVisibility();
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}
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_updateVisibility() {
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this._container.style.setProperty('visibility', this.isVisibleSync() ? 'visible' : 'hidden', 'important');
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}
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_focusParent() {
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if (this._parent !== null) {
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// Chrome doesn't like focusing iframe without contentWindow.
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const contentWindow = this._parent._container.contentWindow;
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if (contentWindow !== null) {
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contentWindow.focus();
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}
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} else {
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// Firefox doesn't like focusing window without first blurring the iframe.
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// this.container.contentWindow.blur() doesn't work on Firefox for some reason.
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this._container.blur();
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// This is needed for Chrome.
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window.focus();
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}
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}
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_getSiteColor() {
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const color = [255, 255, 255];
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Popup._addColor(color, Popup._getColorInfo(window.getComputedStyle(document.documentElement).backgroundColor));
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Popup._addColor(color, Popup._getColorInfo(window.getComputedStyle(document.body).backgroundColor));
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const dark = (color[0] < 128 && color[1] < 128 && color[2] < 128);
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return dark ? 'dark' : 'light';
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}
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_invokeApi(action, params={}) {
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if (this._container.contentWindow) {
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this._container.contentWindow.postMessage({action, params}, '*');
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}
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}
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_observeFullscreen() {
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const fullscreenEvents = [
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'fullscreenchange',
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'MSFullscreenChange',
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'mozfullscreenchange',
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'webkitfullscreenchange'
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];
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for (const eventName of fullscreenEvents) {
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document.addEventListener(eventName, () => this._onFullscreenChanged(), false);
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}
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}
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_getFullscreenElement() {
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return (
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document.fullscreenElement ||
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document.msFullscreenElement ||
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document.mozFullScreenElement ||
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document.webkitFullscreenElement
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);
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}
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_onFullscreenChanged() {
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const parent = (this._getFullscreenElement() || document.body || null);
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if (parent !== null && this._container.parentNode !== parent) {
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parent.appendChild(this._container);
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}
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}
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static _getPositionForHorizontalText(elementRect, width, height, viewport, offsetScale, optionsGeneral) {
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const preferBelow = (optionsGeneral.popupHorizontalTextPosition === 'below');
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const horizontalOffset = optionsGeneral.popupHorizontalOffset * offsetScale;
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const verticalOffset = optionsGeneral.popupVerticalOffset * offsetScale;
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const [x, w] = Popup._getConstrainedPosition(
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elementRect.right - horizontalOffset,
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elementRect.left + horizontalOffset,
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width,
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viewport.left,
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viewport.right,
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true
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);
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const [y, h, below] = Popup._getConstrainedPositionBinary(
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elementRect.top - verticalOffset,
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elementRect.bottom + verticalOffset,
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height,
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viewport.top,
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viewport.bottom,
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preferBelow
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);
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return [x, y, w, h, below];
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}
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static _getPositionForVerticalText(elementRect, width, height, viewport, offsetScale, optionsGeneral, writingMode) {
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const preferRight = Popup._isVerticalTextPopupOnRight(optionsGeneral.popupVerticalTextPosition, writingMode);
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const horizontalOffset = optionsGeneral.popupHorizontalOffset2 * offsetScale;
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const verticalOffset = optionsGeneral.popupVerticalOffset2 * offsetScale;
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const [x, w] = Popup._getConstrainedPositionBinary(
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elementRect.left - horizontalOffset,
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elementRect.right + horizontalOffset,
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width,
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viewport.left,
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viewport.right,
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preferRight
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);
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const [y, h, below] = Popup._getConstrainedPosition(
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elementRect.bottom - verticalOffset,
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elementRect.top + verticalOffset,
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height,
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viewport.top,
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viewport.bottom,
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true
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);
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return [x, y, w, h, below];
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}
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static _isVerticalTextPopupOnRight(positionPreference, writingMode) {
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switch (positionPreference) {
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case 'before':
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return !Popup._isWritingModeLeftToRight(writingMode);
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case 'after':
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return Popup._isWritingModeLeftToRight(writingMode);
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case 'left':
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return false;
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case 'right':
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return true;
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}
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}
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static _isWritingModeLeftToRight(writingMode) {
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switch (writingMode) {
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case 'vertical-lr':
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case 'sideways-lr':
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return true;
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default:
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return false;
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}
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}
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static _getConstrainedPosition(positionBefore, positionAfter, size, minLimit, maxLimit, after) {
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size = Math.min(size, maxLimit - minLimit);
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let position;
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if (after) {
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position = Math.max(minLimit, positionAfter);
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position = position - Math.max(0, (position + size) - maxLimit);
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} else {
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position = Math.min(maxLimit, positionBefore) - size;
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position = position + Math.max(0, minLimit - position);
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}
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return [position, size, after];
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}
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static _getConstrainedPositionBinary(positionBefore, positionAfter, size, minLimit, maxLimit, after) {
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const overflowBefore = minLimit - (positionBefore - size);
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const overflowAfter = (positionAfter + size) - maxLimit;
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if (overflowAfter > 0 || overflowBefore > 0) {
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after = (overflowAfter < overflowBefore);
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}
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let position;
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if (after) {
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size -= Math.max(0, overflowAfter);
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position = Math.max(minLimit, positionAfter);
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} else {
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size -= Math.max(0, overflowBefore);
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position = Math.min(maxLimit, positionBefore) - size;
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}
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return [position, size, after];
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}
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static _addColor(target, color) {
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if (color === null) { return; }
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const a = color[3];
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if (a <= 0.0) { return; }
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const aInv = 1.0 - a;
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for (let i = 0; i < 3; ++i) {
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target[i] = target[i] * aInv + color[i] * a;
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}
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}
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static _getColorInfo(cssColor) {
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const m = /^\s*rgba?\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*(?:,\s*([\d.]+)\s*)?\)\s*$/.exec(cssColor);
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if (m === null) { return null; }
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const m4 = m[4];
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return [
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Number.parseInt(m[1], 10),
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Number.parseInt(m[2], 10),
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Number.parseInt(m[3], 10),
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m4 ? Math.max(0.0, Math.min(1.0, Number.parseFloat(m4))) : 1.0
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];
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}
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static _isOnExtensionPage() {
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try {
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const url = chrome.runtime.getURL('/');
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return window.location.href.substring(0, url.length) === url;
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} catch (e) {
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// NOP
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}
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}
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static _getViewport(useVisualViewport) {
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const visualViewport = window.visualViewport;
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if (visualViewport !== null && typeof visualViewport === 'object') {
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const left = visualViewport.offsetLeft;
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const top = visualViewport.offsetTop;
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const width = visualViewport.width;
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const height = visualViewport.height;
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if (useVisualViewport) {
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return {
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left,
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top,
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right: left + width,
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bottom: top + height
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};
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} else {
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const scale = visualViewport.scale;
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return {
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left: 0,
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top: 0,
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right: Math.max(left + width, width * scale),
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bottom: Math.max(top + height, height * scale)
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};
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}
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}
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return {
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left: 0,
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top: 0,
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right: document.body.clientWidth,
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bottom: window.innerHeight
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};
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}
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}
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Popup.outerStylesheet = null;
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