@quick-game/cli
Version:
Command line interface for rapid qg development
125 lines • 4.4 kB
JavaScript
// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import * as ComponentHelpers from '../components/helpers/helpers.js';
import { XElement } from './XElement.js';
let observer = null;
const storedScrollPositions = new WeakMap();
export class XWidget extends XElement {
visible;
shadowRootInternal;
defaultFocusedElement;
elementsToRestoreScrollPositionsFor;
onShownCallback;
onHiddenCallback;
onResizedCallback;
constructor() {
super();
this.style.setProperty('display', 'flex');
this.style.setProperty('flex-direction', 'column');
this.style.setProperty('align-items', 'stretch');
this.style.setProperty('justify-content', 'flex-start');
this.style.setProperty('contain', 'layout style');
this.visible = false;
this.defaultFocusedElement = null;
this.elementsToRestoreScrollPositionsFor = [];
if (!observer) {
observer = new ResizeObserver(entries => {
for (const entry of entries) {
const widget = entry.target;
if (widget.visible && widget.onResizedCallback) {
widget.onResizedCallback.call(null);
}
}
});
}
observer.observe(this);
this.setElementsToRestoreScrollPositionsFor([this]);
}
isShowing() {
return this.visible;
}
setOnShown(callback) {
this.onShownCallback = callback;
}
setOnHidden(callback) {
this.onHiddenCallback = callback;
}
setOnResized(callback) {
this.onResizedCallback = callback;
}
setElementsToRestoreScrollPositionsFor(elements) {
for (const element of this.elementsToRestoreScrollPositionsFor) {
element.removeEventListener('scroll', XWidget.storeScrollPosition, { capture: false });
}
this.elementsToRestoreScrollPositionsFor = elements;
for (const element of this.elementsToRestoreScrollPositionsFor) {
element.addEventListener('scroll', XWidget.storeScrollPosition, { passive: true, capture: false });
}
}
restoreScrollPositions() {
for (const element of this.elementsToRestoreScrollPositionsFor) {
const storedPositions = storedScrollPositions.get(element);
if (storedPositions) {
element.scrollTop = storedPositions.scrollTop;
element.scrollLeft = storedPositions.scrollLeft;
}
}
}
static storeScrollPosition(event) {
const element = event.currentTarget;
storedScrollPositions.set(element, { scrollLeft: element.scrollLeft, scrollTop: element.scrollTop });
}
setDefaultFocusedElement(element) {
if (element && !this.isSelfOrAncestor(element)) {
throw new Error('Default focus must be descendant');
}
this.defaultFocusedElement = element;
}
focus() {
if (!this.visible) {
return;
}
let element;
if (this.defaultFocusedElement && this.isSelfOrAncestor(this.defaultFocusedElement)) {
element = this.defaultFocusedElement;
}
else if (this.tabIndex !== -1) {
element = this;
}
else {
let child = this.traverseNextNode(this);
while (child) {
if ((child instanceof XWidget) && child.visible) {
element = child;
break;
}
child = child.traverseNextNode(this);
}
}
if (!element || element.hasFocus()) {
return;
}
if (element === this) {
HTMLElement.prototype.focus.call(this);
}
else {
element.focus();
}
}
connectedCallback() {
this.visible = true;
this.restoreScrollPositions();
if (this.onShownCallback) {
this.onShownCallback.call(null);
}
}
disconnectedCallback() {
this.visible = false;
if (this.onHiddenCallback) {
this.onHiddenCallback.call(null);
}
}
}
ComponentHelpers.CustomElements.defineComponent('x-widget', XWidget);
//# sourceMappingURL=XWidget.js.map