1 files changed, 53 insertions, 0 deletions
diff --git a/image/decoders/icon/gtk/nsIconChannel.h b/image/decoders/icon/gtk/nsIconChannel.h
new file mode 100644
index 0000000000..6ad26602d0
--- /dev/null
+++ b/image/decoders/icon/gtk/nsIconChannel.h
@@ -0,0 +1,53 @@
+/* -*- 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