author Brian R. Bondy <>
Sat, 21 Jul 2012 13:57:35 -0400
changeset 81921 bb1d806b2efa69a73dda642bdbc387fbe21653be
parent 80438 36d12bbf310a006adb8529850317e3c0cb9b1ea8
permissions -rw-r--r--
Bug 775794. r=jgilbert. a=akeybl

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: sw=2 ts=8 et :
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at:
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 * The Original Code is Mozilla Code.
 * The Initial Developer of the Original Code is
 *   The Mozilla Foundation
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
 * Contributor(s):
 *   Chris Jones <>
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 * ***** END LICENSE BLOCK ***** */

#ifndef mozilla_layout_RenderFrameParent_h
#define mozilla_layout_RenderFrameParent_h

#include "mozilla/layout/PRenderFrameParent.h"

#include <map>
#include "nsDisplayList.h"
#include "Layers.h"

class nsContentView;
class nsFrameLoader;
class nsSubDocumentFrame;

namespace mozilla {

namespace layers {
class ShadowLayersParent;

namespace layout {

class RenderFrameParent : public PRenderFrameParent
  typedef mozilla::layers::FrameMetrics FrameMetrics;
  typedef mozilla::layers::ContainerLayer ContainerLayer;
  typedef mozilla::layers::Layer Layer;
  typedef mozilla::layers::LayerManager LayerManager;
  typedef mozilla::layers::ShadowLayersParent ShadowLayersParent;
  typedef FrameMetrics::ViewID ViewID;

  typedef std::map<ViewID, nsRefPtr<nsContentView> > ViewMap;

  RenderFrameParent(nsFrameLoader* aFrameLoader);
  virtual ~RenderFrameParent();

  void Destroy();

   * Helper function for getting a non-owning reference to a scrollable.
   * @param aId The ID of the frame.
  nsContentView* GetContentView(ViewID aId = FrameMetrics::ROOT_SCROLL_ID);

  void ContentViewScaleChanged(nsContentView* aView);

  void ShadowLayersUpdated();

  NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
                              nsSubDocumentFrame* aFrame,
                              const nsRect& aDirtyRect,
                              const nsDisplayListSet& aLists);

  already_AddRefed<Layer> BuildLayer(nsDisplayListBuilder* aBuilder,
                                     nsIFrame* aFrame,
                                     LayerManager* aManager,
                                     const nsIntRect& aVisibleRect);

  void OwnerContentChanged(nsIContent* aContent);

  void SetBackgroundColor(nscolor aColor) { mBackgroundColor = gfxRGBA(aColor); };

  NS_OVERRIDE void ActorDestroy(ActorDestroyReason why);

  NS_OVERRIDE virtual PLayersParent* AllocPLayers(LayerManager::LayersBackend* aBackendType);
  NS_OVERRIDE virtual bool DeallocPLayers(PLayersParent* aLayers);

  void BuildViewMap();

  LayerManager* GetLayerManager() const;
  ShadowLayersParent* GetShadowLayers() const;
  ContainerLayer* GetRootLayer() const;

  nsRefPtr<nsFrameLoader> mFrameLoader;
  nsRefPtr<ContainerLayer> mContainer;

  // This contains the views for all the scrollable frames currently in the
  // painted region of our remote content.
  ViewMap mContentViews;

  // True after Destroy() has been called, which is triggered
  // originally by nsFrameLoader::Destroy().  After this point, we can
  // no longer safely ask the frame loader to find its nearest layer
  // manager, because it may have been disconnected from the DOM.
  // It's still OK to *tell* the frame loader that we've painted after
  // it's destroyed; it'll just ignore us, and we won't be able to
  // find an nsIFrame to invalidate.  See ShadowLayersUpdated().
  // Prefer the extra bit of state to null'ing out mFrameLoader in
  // Destroy() so that less code needs to be special-cased for after
  // Destroy().
  // It's possible for mFrameLoader==null and
  // mFrameLoaderDestroyed==false.
  bool mFrameLoaderDestroyed;
  // this is gfxRGBA because that's what ColorLayer wants.
  gfxRGBA mBackgroundColor;

} // namespace layout
} // namespace mozilla

 * A DisplayRemote exists solely to graft a child process's shadow
 * layer tree (for a given RenderFrameParent) into its parent
 * process's layer tree.
class nsDisplayRemote : public nsDisplayItem
  typedef mozilla::layout::RenderFrameParent RenderFrameParent;

  nsDisplayRemote(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame,
                  RenderFrameParent* aRemoteFrame)
    : nsDisplayItem(aBuilder, aFrame)
    , mRemoteFrame(aRemoteFrame)

  virtual LayerState GetLayerState(nsDisplayListBuilder* aBuilder,
                                   LayerManager* aManager)
  { return mozilla::LAYER_ACTIVE; }  

  virtual already_AddRefed<Layer>
  BuildLayer(nsDisplayListBuilder* aBuilder, LayerManager* aManager,
             const ContainerParameters& aContainerParameters);


  RenderFrameParent* mRemoteFrame;

 * nsDisplayRemoteShadow is a way of adding display items for frames in a
 * separate process, for hit testing only. After being processed, the hit
 * test state will contain IDs for any remote frames that were hit.
 * The frame should be its respective render frame parent.
class nsDisplayRemoteShadow : public nsDisplayItem
  typedef mozilla::layout::RenderFrameParent RenderFrameParent;
  typedef mozilla::layers::FrameMetrics::ViewID ViewID;

  nsDisplayRemoteShadow(nsDisplayListBuilder* aBuilder,
                        nsIFrame* aFrame,
                        nsRect aRect,
                        ViewID aId)
    : nsDisplayItem(aBuilder, aFrame)
    , mRect(aRect)
    , mId(aId)

  NS_OVERRIDE nsRect GetBounds(nsDisplayListBuilder* aBuilder)
    return mRect;

  virtual PRUint32 GetPerFrameKey()
    return 0;

  NS_OVERRIDE void HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
                           HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames);


  nsRect mRect;
  ViewID mId;

#endif  // mozilla_layout_RenderFrameParent_h