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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 mozilla_widget_IconLoaderHelperWin_h
#define mozilla_widget_IconLoaderHelperWin_h
#include "mozilla/widget/IconLoader.h"
#include "nsISupports.h"
namespace mozilla::widget {
/**
* Classes that want to hear about when icons load should subclass
* IconLoaderListenerWin, and implement the OnComplete() method,
* which will be called once the load of the icon has completed.
*/
class IconLoaderListenerWin : public nsISupports {
public:
IconLoaderListenerWin() = default;
// IconLoaderListenerWin needs to implement nsISupports in order for its
// subclasses to participate in cycle collection.
virtual nsresult OnComplete() = 0;
protected:
virtual ~IconLoaderListenerWin() = default;
};
/**
* This is a Helper used with mozilla::widget::IconLoader that implements the
* Windows-specific functionality for converting a loaded icon into an HICON.
*/
class IconLoaderHelperWin final : public mozilla::widget::IconLoader::Helper {
public:
explicit IconLoaderHelperWin(
mozilla::widget::IconLoaderListenerWin* aLoadListener);
// IconLoaderHelperWin needs to implement nsISupports in order for its
// subclasses to participate in cycle collection.
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_CLASS(IconLoaderHelperWin)
nsresult OnComplete(imgIContainer* aImage, const nsIntRect& aRect) override;
/**
* IconLoaderHelperWin will default the HICON returned by GetNativeIconImage
* to the application icon. Once the load of the icon by IconLoader has
* completed, GetNativeIconImage will return the loaded icon.
*
* Note that IconLoaderHelperWin owns this HICON. If you don't need it to hold
* onto the HICON anymore, call Destroy on it to deallocate. The
* IconLoaderHelperWin destructor will also deallocate the HICON if necessary.
*/
HICON GetNativeIconImage();
void Destroy();
protected:
~IconLoaderHelperWin();
private:
RefPtr<mozilla::widget::IconLoaderListenerWin> mLoadListener;
HICON mNativeIconImage;
};
} // namespace mozilla::widget
#endif // mozilla_widget_IconLoaderHelperWin_h
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