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theia-dock-panel.ts
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theia-dock-panel.ts
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/********************************************************************************
* Copyright (C) 2018 TypeFox and others.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the Eclipse
* Public License v. 2.0 are satisfied: GNU General Public License, version 2
* with the GNU Classpath Exception which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
********************************************************************************/
import { find, toArray, ArrayExt } from '@phosphor/algorithm';
import { TabBar, Widget, DockPanel, Title, DockLayout } from '@phosphor/widgets';
import { Signal } from '@phosphor/signaling';
import { Disposable, DisposableCollection } from '../../common/disposable';
import { UnsafeWidgetUtilities } from '../widgets';
import { CorePreferences } from '../core-preferences';
import { inject } from 'inversify';
import { Emitter, environment } from '../../common';
export const MAXIMIZED_CLASS = 'theia-maximized';
const VISIBLE_MENU_MAXIMIZED_CLASS = 'theia-visible-menu-maximized';
export const MAIN_AREA_ID = 'theia-main-content-panel';
export const BOTTOM_AREA_ID = 'theia-bottom-content-panel';
/**
* This specialization of DockPanel adds various events that are used for implementing the
* side panels of the application shell.
*/
export class TheiaDockPanel extends DockPanel {
/**
* Emitted when a widget is added to the panel.
*/
readonly widgetAdded = new Signal<this, Widget>(this);
/**
* Emitted when a widget is activated by calling `activateWidget`.
*/
readonly widgetActivated = new Signal<this, Widget>(this);
/**
* Emitted when a widget is removed from the panel.
*/
readonly widgetRemoved = new Signal<this, Widget>(this);
protected readonly onDidToggleMaximizedEmitter = new Emitter<Widget>();
readonly onDidToggleMaximized = this.onDidToggleMaximizedEmitter.event;
constructor(options?: DockPanel.IOptions,
@inject(CorePreferences) protected readonly preferences?: CorePreferences
) {
super(options);
this['_onCurrentChanged'] = (sender: TabBar<Widget>, args: TabBar.ICurrentChangedArgs<Widget>) => {
this.markAsCurrent(args.currentTitle || undefined);
super['_onCurrentChanged'](sender, args);
};
this['_onTabActivateRequested'] = (sender: TabBar<Widget>, args: TabBar.ITabActivateRequestedArgs<Widget>) => {
this.markAsCurrent(args.title);
super['_onTabActivateRequested'](sender, args);
};
if (preferences) {
preferences.onPreferenceChanged(preference => {
if (!this.isElectron() && preference.preferenceName === 'window.menuBarVisibility' && (preference.newValue === 'visible' || preference.oldValue === 'visible')) {
this.handleMenuBarVisibility(preference.newValue);
}
});
}
}
isElectron(): boolean {
return environment.electron.is();
}
protected handleMenuBarVisibility(newValue: string): void {
const areaContainer = this.node.parentElement;
const maximizedElement = this.getMaximizedElement();
if (areaContainer === maximizedElement) {
if (newValue === 'visible') {
this.addClass(VISIBLE_MENU_MAXIMIZED_CLASS);
} else {
this.removeClass(VISIBLE_MENU_MAXIMIZED_CLASS);
}
}
}
protected _currentTitle: Title<Widget> | undefined;
get currentTitle(): Title<Widget> | undefined {
return this._currentTitle;
}
get currentTabBar(): TabBar<Widget> | undefined {
return this._currentTitle && this.findTabBar(this._currentTitle);
}
findTabBar(title: Title<Widget>): TabBar<Widget> | undefined {
return find(this.tabBars(), bar => ArrayExt.firstIndexOf(bar.titles, title) > -1);
}
protected readonly toDisposeOnMarkAsCurrent = new DisposableCollection();
markAsCurrent(title: Title<Widget> | undefined): void {
this.toDisposeOnMarkAsCurrent.dispose();
this._currentTitle = title;
if (title) {
const resetCurrent = () => this.markAsCurrent(undefined);
title.owner.disposed.connect(resetCurrent);
this.toDisposeOnMarkAsCurrent.push(Disposable.create(() =>
title.owner.disposed.disconnect(resetCurrent)
));
}
}
addWidget(widget: Widget, options?: DockPanel.IAddOptions): void {
if (this.mode === 'single-document' && widget.parent === this) {
return;
}
super.addWidget(widget, options);
this.widgetAdded.emit(widget);
}
activateWidget(widget: Widget): void {
super.activateWidget(widget);
this.widgetActivated.emit(widget);
}
protected onChildRemoved(msg: Widget.ChildMessage): void {
super.onChildRemoved(msg);
this.widgetRemoved.emit(msg.child);
}
nextTabBarWidget(widget: Widget): Widget | undefined {
const current = this.findTabBar(widget.title);
const next = current && this.nextTabBarInPanel(current);
return next && next.currentTitle && next.currentTitle.owner || undefined;
}
nextTabBarInPanel(tabBar: TabBar<Widget>): TabBar<Widget> | undefined {
const tabBars = toArray(this.tabBars());
const index = tabBars.indexOf(tabBar);
if (index !== -1) {
return tabBars[index + 1];
}
return undefined;
}
previousTabBarWidget(widget: Widget): Widget | undefined {
const current = this.findTabBar(widget.title);
const previous = current && this.previousTabBarInPanel(current);
return previous && previous.currentTitle && previous.currentTitle.owner || undefined;
}
previousTabBarInPanel(tabBar: TabBar<Widget>): TabBar<Widget> | undefined {
const tabBars = toArray(this.tabBars());
const index = tabBars.indexOf(tabBar);
if (index !== -1) {
return tabBars[index - 1];
}
return undefined;
}
protected readonly toDisposeOnToggleMaximized = new DisposableCollection();
toggleMaximized(): void {
const areaContainer = this.node.parentElement;
if (!areaContainer) {
return;
}
const maximizedElement = this.getMaximizedElement();
if (areaContainer === maximizedElement) {
this.toDisposeOnToggleMaximized.dispose();
return;
}
if (this.isAttached) {
UnsafeWidgetUtilities.detach(this);
}
maximizedElement.style.display = 'block';
this.addClass(MAXIMIZED_CLASS);
const preference = this.preferences?.get('window.menuBarVisibility');
if (!this.isElectron() && preference === 'visible') {
this.addClass(VISIBLE_MENU_MAXIMIZED_CLASS);
}
UnsafeWidgetUtilities.attach(this, maximizedElement);
this.fit();
this.onDidToggleMaximizedEmitter.fire(this);
this.toDisposeOnToggleMaximized.push(Disposable.create(() => {
maximizedElement.style.display = 'none';
this.removeClass(MAXIMIZED_CLASS);
this.onDidToggleMaximizedEmitter.fire(this);
if (!this.isElectron()) {
this.removeClass(VISIBLE_MENU_MAXIMIZED_CLASS);
}
if (this.isAttached) {
UnsafeWidgetUtilities.detach(this);
}
UnsafeWidgetUtilities.attach(this, areaContainer);
this.fit();
}));
const layout = this.layout;
if (layout instanceof DockLayout) {
const onResize = layout['onResize'];
layout['onResize'] = () => onResize.bind(layout)(Widget.ResizeMessage.UnknownSize);
this.toDisposeOnToggleMaximized.push(Disposable.create(() => layout['onResize'] = onResize));
}
const removedListener = () => {
if (!this.widgets().next()) {
this.toDisposeOnToggleMaximized.dispose();
}
};
this.widgetRemoved.connect(removedListener);
this.toDisposeOnToggleMaximized.push(Disposable.create(() => this.widgetRemoved.disconnect(removedListener)));
}
protected maximizedElement: HTMLElement | undefined;
protected getMaximizedElement(): HTMLElement {
if (!this.maximizedElement) {
this.maximizedElement = document.createElement('div');
this.maximizedElement.style.display = 'none';
document.body.appendChild(this.maximizedElement);
}
return this.maximizedElement;
}
}