gecko-dev/widget/headless/HeadlessWidget.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef HEADLESSWIDGET_H
#define HEADLESSWIDGET_H
#include "mozilla/widget/InProcessCompositorWidget.h"
#include "nsBaseWidget.h"
namespace mozilla {
namespace widget {
class HeadlessWidget : public nsBaseWidget
{
public:
HeadlessWidget() {}
NS_DECL_ISUPPORTS_INHERITED
void* GetNativeData(uint32_t aDataType) override
{
// Headless widgets have no native data.
return nullptr;
}
virtual nsresult Create(nsIWidget* aParent,
nsNativeWidget aNativeParent,
const LayoutDeviceIntRect& aRect,
nsWidgetInitData* aInitData = nullptr) override;
using nsBaseWidget::Create; // for Create signature not overridden here
virtual already_AddRefed<nsIWidget> CreateChild(const LayoutDeviceIntRect& aRect,
nsWidgetInitData* aInitData = nullptr,
bool aForceUseIWidgetParent = false) override;
virtual void Show(bool aState) override;
virtual bool IsVisible() const override;
virtual void Move(double aX, double aY) override;
virtual void Resize(double aWidth,
double aHeight,
bool aRepaint) override;
virtual void Resize(double aX,
double aY,
double aWidth,
double aHeight,
bool aRepaint) override;
virtual void SetSizeMode(nsSizeMode aMode) override;
virtual nsresult MakeFullScreen(bool aFullScreen,
nsIScreen* aTargetScreen = nullptr) override;
virtual void Enable(bool aState) override;
virtual bool IsEnabled() const override;
virtual nsresult SetFocus(bool aRaise) override;
virtual nsresult ConfigureChildren(const nsTArray<Configuration>& aConfigurations) override
{
MOZ_ASSERT_UNREACHABLE("Headless widgets do not support configuring children.");
return NS_ERROR_FAILURE;
}
virtual void Invalidate(const LayoutDeviceIntRect& aRect) override
{
// TODO: see if we need to do anything here.
}
virtual nsresult SetTitle(const nsAString& title) override {
// Headless widgets have no title, so just ignore it.
return NS_OK;
}
virtual LayoutDeviceIntPoint WidgetToScreenOffset() override;
virtual void SetInputContext(const InputContext& aContext,
const InputContextAction& aAction) override
{
mInputContext = aContext;
}
virtual InputContext GetInputContext() override
{
return mInputContext;
}
virtual LayerManager*
GetLayerManager(PLayerTransactionChild* aShadowManager = nullptr,
LayersBackend aBackendHint = mozilla::layers::LayersBackend::LAYERS_NONE,
LayerManagerPersistence aPersistence = LAYER_MANAGER_CURRENT) override;
virtual nsresult DispatchEvent(WidgetGUIEvent* aEvent,
nsEventStatus& aStatus) override;
private:
~HeadlessWidget() {}
bool mEnabled;
bool mVisible;
// The size mode before entering fullscreen mode.
nsSizeMode mLastSizeMode;
InputContext mInputContext;
// In headless there is no window manager to track window bounds
// across size mode changes, so we must track it to emulate.
LayoutDeviceIntRect mRestoreBounds;
void SendSetZLevelEvent();
};
} // namespace widget
} // namespace mozilla
#endif