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// Copyright (c) 2011 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/browser/renderer_host/java_bridge_dispatcher_host.h"
#include "content/browser/browser_thread.h"
#include "content/browser/renderer_host/java_bridge_channel_host.h"
#include "content/browser/renderer_host/browser_render_process_host.h"
#include "content/browser/renderer_host/render_view_host.h"
#include "content/common/child_process.h"
#include "content/common/java_bridge_messages.h"
#include "content/common/npobject_stub.h"
#include "content/common/npobject_util.h" // For CreateNPVariantParam()
#include "third_party/WebKit/Source/WebKit/chromium/public/WebBindings.h"
JavaBridgeDispatcherHost::JavaBridgeDispatcherHost(
RenderViewHost* render_view_host)
: render_view_host_(render_view_host) {
DCHECK(render_view_host_);
}
JavaBridgeDispatcherHost::~JavaBridgeDispatcherHost() {
}
void JavaBridgeDispatcherHost::AddNamedObject(const string16& name,
NPObject* object) {
// Post to the WEBKIT thread, as that's where we want injected objects to
// live.
WebKit::WebBindings::retainObject(object);
BrowserThread::PostTask(
BrowserThread::WEBKIT,
FROM_HERE,
NewRunnableMethod(this,
&JavaBridgeDispatcherHost::DoAddNamedObject,
name,
object));
}
void JavaBridgeDispatcherHost::RemoveNamedObject(const string16& name) {
// On receipt of this message, the JavaBridgeDispatcher will drop its
// reference to the corresponding proxy object. When the last reference is
// removed, the proxy object will delete its NPObjectProxy, which will cause
// the NPObjectStub to be deleted, which will drop its reference to the
// original NPObject.
render_view_host_->Send(new JavaBridgeMsg_RemoveNamedObject(
render_view_host_->routing_id(), name));
}
void JavaBridgeDispatcherHost::DoAddNamedObject(const string16& name,
NPObject* object) {
EnsureChannelIsSetUp();
NPVariant variant;
OBJECT_TO_NPVARIANT(object, variant);
DCHECK_EQ(variant.type, NPVariantType_Object);
// Create an NPVariantParam suitable for serialization over IPC from our
// NPVariant. Internally, this will create an NPObjectStub, which takes a
// reference to the underlying NPObject. We pass release = true to release
// the ref added in AddNamedObject(). We don't need the containing window or
// the page URL, as we don't do re-entrant sync IPC.
NPVariant_Param variant_param;
CreateNPVariantParam(variant, channel_, &variant_param, true, 0, GURL());
DCHECK_EQ(variant_param.type, NPVARIANT_PARAM_SENDER_OBJECT_ROUTING_ID);
render_view_host_->Send(new JavaBridgeMsg_AddNamedObject(
render_view_host_->routing_id(), name, variant_param));
}
void JavaBridgeDispatcherHost::EnsureChannelIsSetUp() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::WEBKIT));
if (channel_) {
return;
}
channel_ = JavaBridgeChannelHost::GetJavaBridgeChannelHost(
render_view_host_->process()->id(),
BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO));
// The channel creates the channel handle based on the renderer ID we passed
// to GetJavaBridgeChannelHost() and, on POSIX, the file descriptor used by
// the underlying channel.
IPC::ChannelHandle channel_handle = channel_->channel_handle();
bool sent = render_view_host_->Send(new JavaBridgeMsg_Init(
render_view_host_->routing_id(), channel_handle));
DCHECK(sent);
}
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