422 lines
14 KiB
JavaScript
422 lines
14 KiB
JavaScript
/*
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* Copyright (C) 2016-2017 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 <http://www.gnu.org/licenses/>.
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*/
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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.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.extension.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.injectPromise = null;
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this.isInjected = false;
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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.updateVisibility();
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}
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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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});
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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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this.isInjected = true;
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});
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}
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isInitialized() {
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return this.options !== null;
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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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async showContent(elementRect, writingMode, type=null, details=null) {
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if (!this.isInitialized()) { return; }
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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 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 [x, y, width, height, below] = getPosition(
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elementRect,
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Math.max(containerRect.width, optionsGeneral.popupWidth),
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Math.max(containerRect.height, optionsGeneral.popupHeight),
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document.body.clientWidth,
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window.innerHeight,
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optionsGeneral,
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writingMode
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);
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container.classList.toggle('yomichan-float-full-width', optionsGeneral.popupDisplayMode === 'full-width');
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container.classList.toggle('yomichan-float-above', !below);
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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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static getPositionForHorizontalText(elementRect, width, height, maxWidth, maxHeight, optionsGeneral) {
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let x = elementRect.left + optionsGeneral.popupHorizontalOffset;
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const overflowX = Math.max(x + width - maxWidth, 0);
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if (overflowX > 0) {
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if (x >= overflowX) {
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x -= overflowX;
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} else {
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width = maxWidth;
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x = 0;
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}
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}
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const preferBelow = (optionsGeneral.popupHorizontalTextPosition === 'below');
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const verticalOffset = optionsGeneral.popupVerticalOffset;
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const [y, h, below] = Popup.limitGeometry(
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elementRect.top - verticalOffset,
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elementRect.bottom + verticalOffset,
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height,
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maxHeight,
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preferBelow
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);
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return [x, y, width, h, below];
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}
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static getPositionForVerticalText(elementRect, width, height, maxWidth, maxHeight, optionsGeneral, writingMode) {
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const preferRight = Popup.isVerticalTextPopupOnRight(optionsGeneral.popupVerticalTextPosition, writingMode);
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const horizontalOffset = optionsGeneral.popupHorizontalOffset2;
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const verticalOffset = optionsGeneral.popupVerticalOffset2;
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const [x, w] = Popup.limitGeometry(
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elementRect.left - horizontalOffset,
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elementRect.right + horizontalOffset,
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width,
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maxWidth,
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preferRight
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);
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const [y, h, below] = Popup.limitGeometry(
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elementRect.bottom - verticalOffset,
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elementRect.top + verticalOffset,
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height,
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maxHeight,
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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 limitGeometry(positionBefore, positionAfter, size, limit, preferAfter) {
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let after = preferAfter;
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let position = 0;
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const overflowBefore = Math.max(0, size - positionBefore);
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const overflowAfter = Math.max(0, positionAfter + size - limit);
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if (overflowAfter > 0 || overflowBefore > 0) {
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if (overflowAfter < overflowBefore) {
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size = Math.max(0, size - overflowAfter);
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position = positionAfter;
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after = true;
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} else {
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size = Math.max(0, size - overflowBefore);
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position = Math.max(0, positionBefore - size);
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after = false;
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}
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} else {
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position = preferAfter ? positionAfter : positionBefore - size;
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}
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return [position, size, after];
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}
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hide(changeFocus) {
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if (!this.isVisible()) {
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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 isVisibleAsync() {
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return this.isVisible();
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}
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isVisible() {
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return this.isInjected && (this.visibleOverride !== null ? this.visibleOverride : this.visible);
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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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setVisibleOverride(visible) {
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this.visibleOverride = 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.isVisible() ? '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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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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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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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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async containsPoint(x, y) {
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for (let popup = this; popup !== null && popup.isVisible(); 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 setCustomCss(css) {
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this.invokeApi('setCustomCss', {css});
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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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clearAutoPlayTimer() {
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if (this.isInjected) {
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this.invokeApi('clearAutoPlayTimer');
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}
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}
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invokeApi(action, params={}) {
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this.container.contentWindow.postMessage({action, params}, '*');
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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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get url() {
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return window.location.href;
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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.substr(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 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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}
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Popup.outerStylesheet = null;
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