зеркало из https://github.com/mozilla/gecko-dev.git
103 строки
3.5 KiB
C
103 строки
3.5 KiB
C
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef HEADLESSWIDGET_H
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#define HEADLESSWIDGET_H
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#include "mozilla/widget/InProcessCompositorWidget.h"
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#include "nsBaseWidget.h"
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namespace mozilla {
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namespace widget {
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class HeadlessWidget : public nsBaseWidget
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{
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public:
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HeadlessWidget() {}
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NS_DECL_ISUPPORTS_INHERITED
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void* GetNativeData(uint32_t aDataType) override
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{
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// Headless widgets have no native data.
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return nullptr;
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}
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virtual nsresult Create(nsIWidget* aParent,
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nsNativeWidget aNativeParent,
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const LayoutDeviceIntRect& aRect,
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nsWidgetInitData* aInitData = nullptr) override;
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using nsBaseWidget::Create; // for Create signature not overridden here
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virtual already_AddRefed<nsIWidget> CreateChild(const LayoutDeviceIntRect& aRect,
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nsWidgetInitData* aInitData = nullptr,
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bool aForceUseIWidgetParent = false) override;
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virtual void Show(bool aState) override;
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virtual bool IsVisible() const override;
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virtual void Move(double aX, double aY) override
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{
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MOZ_ASSERT_UNREACHABLE("Headless widgets do not support moving.");
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}
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virtual void Resize(double aWidth,
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double aHeight,
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bool aRepaint) override;
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virtual void Resize(double aX,
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double aY,
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double aWidth,
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double aHeight,
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bool aRepaint) override;
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virtual void Enable(bool aState) override;
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virtual bool IsEnabled() const override;
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virtual nsresult SetFocus(bool aRaise) override { return NS_OK; }
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virtual nsresult ConfigureChildren(const nsTArray<Configuration>& aConfigurations) override
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{
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MOZ_ASSERT_UNREACHABLE("Headless widgets do not support configuring children.");
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return NS_ERROR_FAILURE;
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}
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virtual void Invalidate(const LayoutDeviceIntRect& aRect) override
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{
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// TODO: see if we need to do anything here.
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}
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virtual nsresult SetTitle(const nsAString& title) override {
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// Headless widgets have no title, so just ignore it.
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return NS_OK;
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}
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virtual LayoutDeviceIntPoint WidgetToScreenOffset() override
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{
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// For now headless widgets cannot be moved, so always return 0,0.
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return LayoutDeviceIntPoint(0, 0);
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}
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virtual void SetInputContext(const InputContext& aContext,
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const InputContextAction& aAction) override
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{
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MOZ_ASSERT_UNREACHABLE("Headless widgets do not support input context.");
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}
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virtual InputContext GetInputContext() override
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{
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MOZ_ASSERT_UNREACHABLE("Headless widgets do not support input context.");
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InputContext context;
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return context;
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}
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virtual LayerManager*
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GetLayerManager(PLayerTransactionChild* aShadowManager = nullptr,
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LayersBackend aBackendHint = mozilla::layers::LayersBackend::LAYERS_NONE,
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LayerManagerPersistence aPersistence = LAYER_MANAGER_CURRENT) override;
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virtual nsresult DispatchEvent(WidgetGUIEvent* aEvent,
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nsEventStatus& aStatus) override;
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private:
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~HeadlessWidget() {}
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bool mEnabled;
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bool mVisible;
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};
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} // namespace widget
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} // namespace mozilla
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#endif
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