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