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