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/* -*- Mode: C++; tab-width: 20; 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_image_decoders_icon_gtk_nsIconChannel_h
#define mozilla_image_decoders_icon_gtk_nsIconChannel_h
#include "mozilla/Attributes.h"
#include "nsIChannel.h"
#include "nsIURI.h"
#include "nsIIconURI.h"
#include "nsCOMPtr.h"
namespace mozilla::ipc {
class ByteBuf;
}
/// This class is the GTK implementation of nsIconChannel. It asks
/// GTK for the icon, translates the pixel data in-memory into
/// nsIconDecoder format, and proxies the nsChannel interface to a new
/// channel returning that image.
class nsIconChannel final : public nsIChannel {
public:
NS_DECL_ISUPPORTS
NS_FORWARD_NSIREQUEST(mRealChannel->)
NS_FORWARD_NSICHANNEL(mRealChannel->)
nsIconChannel() {}
static void Shutdown();
/// Called by nsIconProtocolHandler after it creates this channel.
/// Must be called before calling any other function on this object.
/// If this method fails, no other function must be called on this object.
nsresult Init(nsIURI* aURI);
/// Obtains an icon, in nsIconDecoder format, as a ByteBuf instead
/// of a channel. For use with IPC.
static nsresult GetIcon(nsIURI* aURI, mozilla::ipc::ByteBuf* aDataOut);
private:
~nsIconChannel() {}
/// The input stream channel which will yield the image.
/// Will always be non-null after a successful Init.
nsCOMPtr<nsIChannel> mRealChannel;
static nsresult GetIconWithGIO(nsIMozIconURI* aIconURI,
mozilla::ipc::ByteBuf* aDataOut);
};
#endif // mozilla_image_decoders_icon_gtk_nsIconChannel_h
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