yomichan/ext/fg/js/popup.js

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JavaScript
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/*
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* Copyright (C) 2016-2017 Alex Yatskov <alex@foosoft.net>
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* 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 <http://www.gnu.org/licenses/>.
*/
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class Popup {
constructor(id, depth, frameIdPromise) {
this.id = id;
this.depth = depth;
this.frameIdPromise = frameIdPromise;
this.frameId = null;
this.parent = null;
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this.child = null;
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this.container = document.createElement('iframe');
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this.container.id = 'yomichan-float';
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this.container.addEventListener('mousedown', e => e.stopPropagation());
this.container.addEventListener('scroll', e => e.stopPropagation());
this.container.setAttribute('src', chrome.extension.getURL('/fg/float.html'));
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this.container.style.width = '0px';
this.container.style.height = '0px';
this.injectPromise = null;
this.isInjected = false;
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this.visible = false;
this.visibleOverride = null;
this.updateVisibility();
}
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inject(options) {
if (this.injectPromise === null) {
this.injectPromise = this.createInjectPromise(options);
}
return this.injectPromise;
}
async createInjectPromise(options) {
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', () => {
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this.invokeApi('initialize', {
options: {
general: {
customPopupCss: options.general.customPopupCss
}
},
popupInfo: {
id: this.id,
depth: this.depth,
parentFrameId
},
url: this.url
});
resolve();
});
this.observeFullscreen();
this.onFullscreenChanged();
this.isInjected = true;
});
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}
async show(elementRect, writingMode, options) {
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await this.inject(options);
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const optionsGeneral = options.general;
const container = this.container;
const containerRect = container.getBoundingClientRect();
const getPosition = (
writingMode === 'horizontal-tb' || optionsGeneral.popupVerticalTextPosition === 'default' ?
Popup.getPositionForHorizontalText :
Popup.getPositionForVerticalText
);
const [x, y, width, height, below] = getPosition(
elementRect,
Math.max(containerRect.width, optionsGeneral.popupWidth),
Math.max(containerRect.height, optionsGeneral.popupHeight),
document.body.clientWidth,
window.innerHeight,
optionsGeneral,
writingMode
);
container.classList.toggle('yomichan-float-full-width', optionsGeneral.popupDisplayMode === 'full-width');
container.classList.toggle('yomichan-float-above', !below);
container.style.left = `${x}px`;
container.style.top = `${y}px`;
container.style.width = `${width}px`;
container.style.height = `${height}px`;
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this.setVisible(true);
if (this.child !== null) {
this.child.hide(true);
}
}
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static getPositionForHorizontalText(elementRect, width, height, maxWidth, maxHeight, optionsGeneral) {
let x = elementRect.left + optionsGeneral.popupHorizontalOffset;
const overflowX = Math.max(x + width - maxWidth, 0);
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if (overflowX > 0) {
if (x >= overflowX) {
x -= overflowX;
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} else {
width = maxWidth;
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x = 0;
}
}
const preferBelow = (optionsGeneral.popupHorizontalTextPosition === 'below');
const verticalOffset = optionsGeneral.popupVerticalOffset;
const [y, h, below] = Popup.limitGeometry(
elementRect.top - verticalOffset,
elementRect.bottom + verticalOffset,
height,
maxHeight,
preferBelow
);
return [x, y, width, h, below];
}
static getPositionForVerticalText(elementRect, width, height, maxWidth, maxHeight, optionsGeneral, writingMode) {
const preferRight = Popup.isVerticalTextPopupOnRight(optionsGeneral.popupVerticalTextPosition, writingMode);
const horizontalOffset = optionsGeneral.popupHorizontalOffset2;
const verticalOffset = optionsGeneral.popupVerticalOffset2;
const [x, w] = Popup.limitGeometry(
elementRect.left - horizontalOffset,
elementRect.right + horizontalOffset,
width,
maxWidth,
preferRight
);
const [y, h, below] = Popup.limitGeometry(
elementRect.bottom - verticalOffset,
elementRect.top + verticalOffset,
height,
maxHeight,
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 limitGeometry(positionBefore, positionAfter, size, limit, preferAfter) {
let after = preferAfter;
let position = 0;
const overflowBefore = Math.max(0, size - positionBefore);
const overflowAfter = Math.max(0, positionAfter + size - limit);
if (overflowAfter > 0 || overflowBefore > 0) {
if (overflowAfter < overflowBefore) {
size = Math.max(0, size - overflowAfter);
position = positionAfter;
after = true;
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} else {
size = Math.max(0, size - overflowBefore);
position = Math.max(0, positionBefore - size);
after = false;
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}
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} else {
position = preferAfter ? positionAfter : positionBefore - size;
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}
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return [position, size, after];
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}
async showOrphaned(elementRect, writingMode, options) {
await this.show(elementRect, writingMode, options);
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this.invokeApi('orphaned');
}
hide(changeFocus) {
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if (!this.isVisible()) {
return;
}
this.setVisible(false);
if (this.child !== null) {
this.child.hide(false);
}
if (changeFocus) {
this.focusParent();
}
}
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isVisible() {
return this.isInjected && (this.visibleOverride !== null ? this.visibleOverride : this.visible);
}
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setVisible(visible) {
this.visible = visible;
this.updateVisibility();
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}
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setVisibleOverride(visible) {
this.visibleOverride = visible;
this.updateVisibility();
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}
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updateVisibility() {
this.container.style.setProperty('visibility', this.isVisible() ? 'visible' : 'hidden', 'important');
}
focusParent() {
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if (this.parent !== null) {
// Chrome doesn't like focusing iframe without contentWindow.
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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();
}
}
async containsPoint(x, y) {
for (let popup = this; popup !== null && popup.isVisible(); 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 termsShow(elementRect, writingMode, definitions, options, context) {
await this.show(elementRect, writingMode, options);
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this.invokeApi('termsShow', {definitions, options, context});
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}
async kanjiShow(elementRect, writingMode, definitions, options, context) {
await this.show(elementRect, writingMode, options);
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this.invokeApi('kanjiShow', {definitions, options, context});
}
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clearAutoPlayTimer() {
if (this.isInjected) {
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this.invokeApi('clearAutoPlayTimer');
}
}
invokeApi(action, params={}) {
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this.container.contentWindow.postMessage({action, params}, '*');
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}
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);
}
}
get url() {
return window.location.href;
}
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}