| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "content/renderer/java/java_bridge_dispatcher.h" |
| |
| #include "content/child/child_process.h" |
| #include "content/child/npapi/npobject_util.h" // For CreateNPVariant() |
| #include "content/common/java_bridge_messages.h" |
| #include "content/public/renderer/render_thread.h" |
| #include "content/public/renderer/render_view.h" |
| #include "content/renderer/java/java_bridge_channel.h" |
| #include "third_party/WebKit/public/web/WebBindings.h" |
| #include "third_party/WebKit/public/web/WebDocument.h" |
| #include "third_party/WebKit/public/web/WebFrame.h" |
| #include "third_party/WebKit/public/web/WebView.h" |
| |
| namespace content { |
| |
| JavaBridgeDispatcher::JavaBridgeDispatcher(RenderView* render_view) |
| : RenderViewObserver(render_view) { |
| } |
| |
| void JavaBridgeDispatcher::EnsureChannelIsSetUp() { |
| if (channel_.get()) { |
| return; |
| } |
| |
| IPC::ChannelHandle channel_handle; |
| Send(new JavaBridgeHostMsg_GetChannelHandle(routing_id(), &channel_handle)); |
| |
| channel_ = JavaBridgeChannel::GetJavaBridgeChannel( |
| channel_handle, ChildProcess::current()->io_message_loop_proxy()); |
| } |
| |
| JavaBridgeDispatcher::~JavaBridgeDispatcher() { |
| for (ObjectMap::const_iterator iter = objects_.begin(); |
| iter != objects_.end(); ++iter) { |
| WebKit::WebBindings::releaseObject(NPVARIANT_TO_OBJECT(iter->second)); |
| } |
| } |
| |
| bool JavaBridgeDispatcher::OnMessageReceived(const IPC::Message& msg) { |
| bool handled = true; |
| IPC_BEGIN_MESSAGE_MAP(JavaBridgeDispatcher, msg) |
| IPC_MESSAGE_HANDLER(JavaBridgeMsg_AddNamedObject, OnAddNamedObject) |
| IPC_MESSAGE_HANDLER(JavaBridgeMsg_RemoveNamedObject, |
| OnRemoveNamedObject) |
| IPC_MESSAGE_UNHANDLED(handled = false) |
| IPC_END_MESSAGE_MAP() |
| return handled; |
| } |
| |
| void JavaBridgeDispatcher::DidClearWindowObject(WebKit::WebFrame* web_frame) { |
| // Note that we have to (re)bind all objects, as they will have been unbound |
| // when the window object was cleared. |
| for (ObjectMap::const_iterator iter = objects_.begin(); |
| iter != objects_.end(); ++iter) { |
| // This refs the NPObject. This reference is dropped when either the window |
| // object is later cleared, or the object is GC'ed. So the object may be |
| // deleted at any time after OnRemoveNamedObject() is called. |
| web_frame->bindToWindowObject(iter->first, |
| NPVARIANT_TO_OBJECT(iter->second)); |
| } |
| } |
| |
| void JavaBridgeDispatcher::OnAddNamedObject( |
| const string16& name, |
| const NPVariant_Param& variant_param) { |
| DCHECK_EQ(variant_param.type, NPVARIANT_PARAM_SENDER_OBJECT_ROUTING_ID); |
| |
| EnsureChannelIsSetUp(); |
| if (!channel_.get()) { |
| // It's possible for |channel_| to be NULL if the RenderView is going away. |
| return; |
| } |
| |
| // This creates an NPObject, wrapped as an NPVariant. Pass 0 for the for |
| // containing window, as this is only used by plugins to pump the window |
| // message queue when a method on a renderer-side object causes a dialog to |
| // be displayed, and the Java Bridge does not need this functionality. The |
| // page URL is also not required. |
| NPVariant variant; |
| bool created = |
| CreateNPVariant(variant_param, channel_.get(), &variant, 0, GURL()); |
| DCHECK(created); |
| DCHECK_EQ(variant.type, NPVariantType_Object); |
| |
| // The NPObject is created with a ref count of one, which we remove when |
| // OnRemoveNamedObject() is called for that object. |
| ObjectMap::iterator iter = objects_.find(name); |
| if (iter != objects_.end()) { |
| WebKit::WebBindings::releaseObject(NPVARIANT_TO_OBJECT(iter->second)); |
| } |
| objects_[name] = variant; |
| } |
| |
| void JavaBridgeDispatcher::OnRemoveNamedObject(const string16& name) { |
| if (!channel_.get()) { |
| DCHECK(objects_.empty()); |
| return; |
| } |
| |
| // Removing an object does not unbind it from JavaScript until the window |
| // object is next cleared. Note that the browser checks that the named object |
| // is present. |
| ObjectMap::iterator iter = objects_.find(name); |
| DCHECK(iter != objects_.end()); |
| WebKit::WebBindings::releaseObject(NPVARIANT_TO_OBJECT(iter->second)); |
| objects_.erase(iter); |
| } |
| |
| } // namespace content |