michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  * vim: sw=2 ts=8 et :
michael@0:  */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "ShadowLayerParent.h"
michael@0: #include "Layers.h"                     // for Layer, ContainerLayer
michael@0: #include "nsDebug.h"                    // for NS_RUNTIMEABORT
michael@0: #include "nsISupportsImpl.h"            // for Layer::AddRef, etc
michael@0: 
michael@0: #include "mozilla/layers/ThebesLayerComposite.h"
michael@0: #include "mozilla/layers/CanvasLayerComposite.h"
michael@0: #include "mozilla/layers/ColorLayerComposite.h"
michael@0: #include "mozilla/layers/ImageLayerComposite.h"
michael@0: #include "mozilla/layers/ContainerLayerComposite.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace layers {
michael@0: 
michael@0: ShadowLayerParent::ShadowLayerParent() : mLayer(nullptr)
michael@0: {
michael@0: }
michael@0: 
michael@0: ShadowLayerParent::~ShadowLayerParent()
michael@0: {
michael@0: }
michael@0: 
michael@0: void
michael@0: ShadowLayerParent::Bind(Layer* layer)
michael@0: {
michael@0:   mLayer = layer;
michael@0: }
michael@0: 
michael@0: void
michael@0: ShadowLayerParent::Destroy()
michael@0: {
michael@0:   // It's possible for Destroy() to come in just after this has been
michael@0:   // created, but just before the transaction in which Bind() would
michael@0:   // have been called.  In that case, we'll ignore shadow-layers
michael@0:   // transactions from there on and never get a layer here.
michael@0:   if (mLayer) {
michael@0:     mLayer->Disconnect();
michael@0:   }
michael@0: }
michael@0: 
michael@0: ContainerLayerComposite*
michael@0: ShadowLayerParent::AsContainerLayerComposite() const
michael@0: {
michael@0:   return mLayer && mLayer->GetType() == Layer::TYPE_CONTAINER
michael@0:          ? static_cast<ContainerLayerComposite*>(mLayer.get())
michael@0:          : nullptr;
michael@0: }
michael@0: 
michael@0: CanvasLayerComposite*
michael@0: ShadowLayerParent::AsCanvasLayerComposite() const
michael@0: {
michael@0:   return mLayer && mLayer->GetType() == Layer::TYPE_CANVAS
michael@0:          ? static_cast<CanvasLayerComposite*>(mLayer.get())
michael@0:          : nullptr;
michael@0: }
michael@0: 
michael@0: ColorLayerComposite*
michael@0: ShadowLayerParent::AsColorLayerComposite() const
michael@0: {
michael@0:   return mLayer && mLayer->GetType() == Layer::TYPE_COLOR
michael@0:          ? static_cast<ColorLayerComposite*>(mLayer.get())
michael@0:          : nullptr;
michael@0: }
michael@0: 
michael@0: ImageLayerComposite*
michael@0: ShadowLayerParent::AsImageLayerComposite() const
michael@0: {
michael@0:   return mLayer && mLayer->GetType() == Layer::TYPE_IMAGE
michael@0:          ? static_cast<ImageLayerComposite*>(mLayer.get())
michael@0:          : nullptr;
michael@0: }
michael@0: 
michael@0: RefLayerComposite*
michael@0: ShadowLayerParent::AsRefLayerComposite() const
michael@0: {
michael@0:   return mLayer && mLayer->GetType() == Layer::TYPE_REF
michael@0:          ? static_cast<RefLayerComposite*>(mLayer.get())
michael@0:          : nullptr;
michael@0: }
michael@0: 
michael@0: ThebesLayerComposite*
michael@0: ShadowLayerParent::AsThebesLayerComposite() const
michael@0: {
michael@0:   return mLayer && mLayer->GetType() == Layer::TYPE_THEBES
michael@0:          ? static_cast<ThebesLayerComposite*>(mLayer.get())
michael@0:          : nullptr;
michael@0: }
michael@0: 
michael@0: void
michael@0: ShadowLayerParent::ActorDestroy(ActorDestroyReason why)
michael@0: {
michael@0:   switch (why) {
michael@0:   case AncestorDeletion:
michael@0:     NS_RUNTIMEABORT("shadow layer deleted out of order!");
michael@0:     return;                     // unreached
michael@0: 
michael@0:   case Deletion:
michael@0:     // See comment near Destroy() above.
michael@0:     if (mLayer) {
michael@0:       mLayer->Disconnect();
michael@0:     }
michael@0:     break;
michael@0: 
michael@0:   case AbnormalShutdown:
michael@0:     if (mLayer) {
michael@0:       mLayer->Disconnect();
michael@0:     }
michael@0:     break;
michael@0: 
michael@0:   case NormalShutdown:
michael@0:     // let IPDL-generated code automatically clean up Shmems and so
michael@0:     // forth; our channel is disconnected anyway
michael@0:     break;
michael@0: 
michael@0:   case FailedConstructor:
michael@0:     NS_RUNTIMEABORT("FailedConstructor isn't possible in PLayerTransaction");
michael@0:     return;                     // unreached
michael@0:   }
michael@0: 
michael@0:   mLayer = nullptr;
michael@0: }
michael@0: 
michael@0: } // namespace layers
michael@0: } // namespace mozilla