yomichan/ext/fg/js/popup.js

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JavaScript
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/*
* Copyright (C) 2016-2020 Yomichan Authors
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*
* 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
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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
* DocumentUtil
* FrameClient
* api
* dynamicLoader
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*/
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class Popup extends EventDispatcher {
constructor({
id,
depth,
frameId,
ownerFrameId,
childrenSupported
}) {
super();
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this._id = id;
this._depth = depth;
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this._frameId = frameId;
this._ownerFrameId = ownerFrameId;
this._childrenSupported = childrenSupported;
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this._parent = null;
this._child = null;
this._injectPromise = null;
this._injectPromiseComplete = false;
this._visible = new DynamicProperty(false);
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this._options = null;
this._optionsContext = null;
this._contentScale = 1.0;
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this._targetOrigin = chrome.runtime.getURL('/').replace(/\/$/, '');
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this._frameSizeContentScale = null;
this._frameClient = null;
this._frame = document.createElement('iframe');
this._frame.className = 'yomichan-popup';
this._frame.style.width = '0';
this._frame.style.height = '0';
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this._container = this._frame;
this._shadow = null;
this._fullscreenEventListeners = new EventListenerCollection();
}
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// Public properties
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get id() {
return this._id;
}
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get parent() {
return this._parent;
}
set parent(value) {
this._parent = value;
}
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get child() {
return this._child;
}
set child(value) {
this._child = value;
}
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get depth() {
return this._depth;
}
get frameContentWindow() {
return this._frame.contentWindow;
}
get container() {
return this._container;
}
get frameId() {
return this._frameId;
}
// Public functions
prepare() {
this._frame.addEventListener('mouseover', this._onFrameMouseOver.bind(this));
this._frame.addEventListener('mouseout', this._onFrameMouseOut.bind(this));
this._frame.addEventListener('mousedown', (e) => e.stopPropagation());
this._frame.addEventListener('scroll', (e) => e.stopPropagation());
this._frame.addEventListener('load', this._onFrameLoad.bind(this));
this._visible.on('change', this._onVisibleChange.bind(this));
yomichan.on('extensionUnloaded', this._onExtensionUnloaded.bind(this));
this._onVisibleChange({value: this.isVisibleSync()});
}
async setOptionsContext(optionsContext) {
await this._setOptionsContext(optionsContext);
await this._invokeSafe('setOptionsContext', {optionsContext});
}
hide(changeFocus) {
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if (!this.isVisibleSync()) {
return;
}
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this._setVisible(false);
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if (this._child !== null) {
this._child.hide(false);
}
if (changeFocus) {
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this._focusParent();
}
}
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async isVisible() {
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return this.isVisibleSync();
}
async setVisibleOverride(value, priority) {
return this._visible.setOverride(value, priority);
}
async clearVisibleOverride(token) {
return this._visible.clearOverride(token);
}
async containsPoint(x, y) {
for (let popup = this; popup !== null && popup.isVisibleSync(); popup = popup.child) {
const rect = popup.getFrameRect();
if (x >= rect.left && y >= rect.top && x < rect.right && y < rect.bottom) {
return true;
}
}
return false;
}
async showContent(details, displayDetails) {
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if (this._options === null) { throw new Error('Options not assigned'); }
const {optionsContext, elementRect, writingMode} = details;
if (optionsContext !== null) {
await this._setOptionsContextIfDifferent(optionsContext);
}
if (typeof elementRect !== 'undefined' && typeof writingMode !== 'undefined') {
await this._show(elementRect, writingMode);
}
if (displayDetails !== null) {
this._invokeSafe('setContent', {details: displayDetails});
}
}
setCustomCss(css) {
this._invokeSafe('setCustomCss', {css});
}
clearAutoPlayTimer() {
this._invokeSafe('clearAutoPlayTimer');
}
setContentScale(scale) {
this._contentScale = scale;
this._frame.style.fontSize = `${scale}px`;
this._invokeSafe('setContentScale', {scale});
}
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isVisibleSync() {
return this._visible.value;
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}
updateTheme() {
const {popupTheme, popupOuterTheme} = this._options.general;
this._frame.dataset.theme = popupTheme;
this._frame.dataset.outerTheme = popupOuterTheme;
this._frame.dataset.siteColor = this._getSiteColor();
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}
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async setCustomOuterCss(css, useWebExtensionApi) {
let parentNode = null;
const inShadow = (this._shadow !== null);
if (inShadow) {
useWebExtensionApi = false;
parentNode = this._shadow;
}
const node = await dynamicLoader.loadStyle('yomichan-popup-outer-user-stylesheet', 'code', css, useWebExtensionApi, parentNode);
this.trigger('customOuterCssChanged', {node, useWebExtensionApi, inShadow});
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}
getFrameRect() {
return this._frame.getBoundingClientRect();
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}
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// Private functions
_onFrameMouseOver() {
this.trigger('framePointerOver', {});
}
_onFrameMouseOut() {
this.trigger('framePointerOut', {});
}
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_inject() {
let injectPromise = this._injectPromise;
if (injectPromise === null) {
injectPromise = this._createInjectPromise();
this._injectPromise = injectPromise;
injectPromise.then(
() => {
if (injectPromise !== this._injectPromise) { return; }
this._injectPromiseComplete = true;
},
() => { this._resetFrame(); }
);
}
return injectPromise;
}
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async _createInjectPromise() {
if (this._options === null) {
throw new Error('Options not initialized');
}
const {useSecurePopupFrameUrl, usePopupShadowDom} = this._options.general;
await this._setUpContainer(usePopupShadowDom);
const setupFrame = (frame) => {
frame.removeAttribute('src');
frame.removeAttribute('srcdoc');
this._observeFullscreen(true);
this._onFullscreenChanged();
const url = chrome.runtime.getURL('/fg/float.html');
if (useSecurePopupFrameUrl) {
frame.contentDocument.location.href = url;
} else {
frame.setAttribute('src', url);
}
};
const frameClient = new FrameClient();
this._frameClient = frameClient;
await frameClient.connect(this._frame, this._targetOrigin, this._frameId, setupFrame);
// Configure
await this._invokeSafe('configure', {
depth: this._depth,
parentPopupId: this._id,
parentFrameId: this._frameId,
ownerFrameId: this._ownerFrameId,
childrenSupported: this._childrenSupported,
scale: this._contentScale,
optionsContext: this._optionsContext
});
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}
_onFrameLoad() {
if (!this._injectPromiseComplete) { return; }
this._resetFrame();
}
_resetFrame() {
const parent = this._container.parentNode;
if (parent !== null) {
parent.removeChild(this._container);
}
this._frame.removeAttribute('src');
this._frame.removeAttribute('srcdoc');
this._frameClient = null;
this._injectPromise = null;
this._injectPromiseComplete = false;
}
async _setUpContainer(usePopupShadowDom) {
if (usePopupShadowDom && typeof this._frame.attachShadow === 'function') {
const container = document.createElement('div');
container.style.setProperty('all', 'initial', 'important');
const shadow = container.attachShadow({mode: 'closed', delegatesFocus: true});
shadow.appendChild(this._frame);
this._container = container;
this._shadow = shadow;
} else {
const frameParentNode = this._frame.parentNode;
if (frameParentNode !== null) {
frameParentNode.removeChild(this._frame);
}
this._container = this._frame;
this._shadow = null;
}
await this._injectStyles();
}
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async _injectStyles() {
try {
await this._injectPopupOuterStylesheet();
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} catch (e) {
// NOP
}
try {
await this.setCustomOuterCss(this._options.general.customPopupOuterCss, true);
} catch (e) {
// NOP
}
}
async _injectPopupOuterStylesheet() {
let fileType = 'file';
let useWebExtensionApi = true;
let parentNode = null;
if (this._shadow !== null) {
fileType = 'file-content';
useWebExtensionApi = false;
parentNode = this._shadow;
}
await dynamicLoader.loadStyle('yomichan-popup-outer-stylesheet', fileType, '/mixed/css/popup-outer.css', useWebExtensionApi, parentNode);
}
_observeFullscreen(observe) {
if (!observe) {
this._fullscreenEventListeners.removeAllEventListeners();
return;
}
if (this._fullscreenEventListeners.size > 0) {
// Already observing
return;
}
DocumentUtil.addFullscreenChangeEventListener(this._onFullscreenChanged.bind(this), this._fullscreenEventListeners);
}
_onFullscreenChanged() {
const parent = this._getFrameParentElement();
if (parent !== null && this._container.parentNode !== parent) {
parent.appendChild(this._container);
}
}
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async _show(elementRect, writingMode) {
await this._inject();
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const optionsGeneral = this._options.general;
const {popupDisplayMode} = optionsGeneral;
const frame = this._frame;
const frameRect = frame.getBoundingClientRect();
const viewport = this._getViewport(optionsGeneral.popupScaleRelativeToVisualViewport);
const scale = this._contentScale;
const scaleRatio = this._frameSizeContentScale === null ? 1.0 : scale / this._frameSizeContentScale;
this._frameSizeContentScale = scale;
const getPositionArgs = [
elementRect,
Math.max(frameRect.width * scaleRatio, optionsGeneral.popupWidth * scale),
Math.max(frameRect.height * scaleRatio, optionsGeneral.popupHeight * scale),
viewport,
scale,
optionsGeneral,
writingMode
];
let [x, y, width, height, below] = (
writingMode === 'horizontal-tb' || optionsGeneral.popupVerticalTextPosition === 'default' ?
this._getPositionForHorizontalText(...getPositionArgs) :
this._getPositionForVerticalText(...getPositionArgs)
);
frame.dataset.popupDisplayMode = popupDisplayMode;
frame.dataset.below = `${below}`;
if (popupDisplayMode === 'full-width') {
x = viewport.left;
y = below ? viewport.bottom - height : viewport.top;
width = viewport.right - viewport.left;
}
frame.style.left = `${x}px`;
frame.style.top = `${y}px`;
frame.style.width = `${width}px`;
frame.style.height = `${height}px`;
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this._setVisible(true);
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if (this._child !== null) {
this._child.hide(true);
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}
}
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_setVisible(visible) {
this._visible.defaultValue = visible;
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}
_onVisibleChange({value}) {
this._frame.style.setProperty('visibility', value ? 'visible' : 'hidden', 'important');
}
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_focusParent() {
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if (this._parent !== null) {
// Chrome doesn't like focusing iframe without contentWindow.
const contentWindow = this._parent.frameContentWindow;
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if (contentWindow !== null) {
contentWindow.focus();
}
} else {
// Firefox doesn't like focusing window without first blurring the iframe.
// this._frame.contentWindow.blur() doesn't work on Firefox for some reason.
this._frame.blur();
// This is needed for Chrome.
window.focus();
}
}
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_getSiteColor() {
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const color = [255, 255, 255];
const {documentElement, body} = document;
if (documentElement !== null) {
this._addColor(color, window.getComputedStyle(documentElement).backgroundColor);
}
if (body !== null) {
this._addColor(color, window.getComputedStyle(body).backgroundColor);
}
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const dark = (color[0] < 128 && color[1] < 128 && color[2] < 128);
return dark ? 'dark' : 'light';
}
async _invoke(action, params={}) {
const contentWindow = this._frame.contentWindow;
if (this._frameClient === null || !this._frameClient.isConnected() || contentWindow === null) { return; }
const message = this._frameClient.createMessage({action, params});
return await api.crossFrame.invoke(this._frameClient.frameId, 'popupMessage', message);
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}
async _invokeSafe(action, params={}, defaultReturnValue) {
try {
return await this._invoke(action, params);
} catch (e) {
if (!yomichan.isExtensionUnloaded) { throw e; }
return defaultReturnValue;
}
}
_invokeWindow(action, params={}) {
const contentWindow = this._frame.contentWindow;
if (this._frameClient === null || !this._frameClient.isConnected() || contentWindow === null) { return; }
const message = this._frameClient.createMessage({action, params});
contentWindow.postMessage(message, this._targetOrigin);
}
_onExtensionUnloaded() {
this._invokeWindow('extensionUnloaded');
}
_getFrameParentElement() {
const defaultParent = document.body;
const fullscreenElement = DocumentUtil.getFullscreenElement();
if (
fullscreenElement === null ||
fullscreenElement.shadowRoot ||
fullscreenElement.openOrClosedShadowRoot // Available to Firefox 63+ for WebExtensions
) {
return defaultParent;
}
switch (fullscreenElement.nodeName.toUpperCase()) {
case 'IFRAME':
case 'FRAME':
return defaultParent;
}
return fullscreenElement;
}
_getPositionForHorizontalText(elementRect, width, height, viewport, offsetScale, optionsGeneral) {
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const preferBelow = (optionsGeneral.popupHorizontalTextPosition === 'below');
const horizontalOffset = optionsGeneral.popupHorizontalOffset * offsetScale;
const verticalOffset = optionsGeneral.popupVerticalOffset * offsetScale;
const [x, w] = this._getConstrainedPosition(
elementRect.right - horizontalOffset,
elementRect.left + horizontalOffset,
width,
viewport.left,
viewport.right,
true
);
const [y, h, below] = this._getConstrainedPositionBinary(
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elementRect.top - verticalOffset,
elementRect.bottom + verticalOffset,
height,
viewport.top,
viewport.bottom,
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preferBelow
);
return [x, y, w, h, below];
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}
_getPositionForVerticalText(elementRect, width, height, viewport, offsetScale, optionsGeneral, writingMode) {
const preferRight = this._isVerticalTextPopupOnRight(optionsGeneral.popupVerticalTextPosition, writingMode);
const horizontalOffset = optionsGeneral.popupHorizontalOffset2 * offsetScale;
const verticalOffset = optionsGeneral.popupVerticalOffset2 * offsetScale;
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const [x, w] = this._getConstrainedPositionBinary(
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elementRect.left - horizontalOffset,
elementRect.right + horizontalOffset,
width,
viewport.left,
viewport.right,
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preferRight
);
const [y, h, below] = this._getConstrainedPosition(
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elementRect.bottom - verticalOffset,
elementRect.top + verticalOffset,
height,
viewport.top,
viewport.bottom,
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true
);
return [x, y, w, h, below];
}
_isVerticalTextPopupOnRight(positionPreference, writingMode) {
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switch (positionPreference) {
case 'before':
return !this._isWritingModeLeftToRight(writingMode);
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case 'after':
return this._isWritingModeLeftToRight(writingMode);
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case 'left':
return false;
case 'right':
return true;
default:
return false;
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}
}
_isWritingModeLeftToRight(writingMode) {
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switch (writingMode) {
case 'vertical-lr':
case 'sideways-lr':
return true;
default:
return false;
}
}
_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];
}
_getConstrainedPositionBinary(positionBefore, positionAfter, size, minLimit, maxLimit, after) {
const overflowBefore = minLimit - (positionBefore - size);
const overflowAfter = (positionAfter + size) - maxLimit;
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if (overflowAfter > 0 || overflowBefore > 0) {
after = (overflowAfter < overflowBefore);
}
let position;
if (after) {
size -= Math.max(0, overflowAfter);
position = Math.max(minLimit, positionAfter);
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} else {
size -= Math.max(0, overflowBefore);
position = Math.min(maxLimit, positionBefore) - size;
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}
return [position, size, after];
}
_addColor(target, cssColor) {
if (typeof cssColor !== 'string') { return; }
const color = this._getColorInfo(cssColor);
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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;
}
}
_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);
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
];
}
_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)
};
}
}
const body = document.body;
return {
left: 0,
top: 0,
right: (body !== null ? body.clientWidth : 0),
bottom: window.innerHeight
};
}
async _setOptionsContext(optionsContext) {
this._optionsContext = optionsContext;
this._options = await api.optionsGet(optionsContext);
this.updateTheme();
}
async _setOptionsContextIfDifferent(optionsContext) {
if (deepEqual(this._optionsContext, optionsContext)) { return; }
await this._setOptionsContext(optionsContext);
}
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}