blob: de525b48cc6b025043c81023aac2a14a70a1da9c [file] [log] [blame]
// 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()) {
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) {
bool JavaBridgeDispatcher::OnMessageReceived(const IPC::Message& msg) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(JavaBridgeDispatcher, msg)
IPC_MESSAGE_HANDLER(JavaBridgeMsg_AddNamedObject, OnAddNamedObject)
IPC_MESSAGE_UNHANDLED(handled = false)
return handled;
void JavaBridgeDispatcher::DidClearWindowObject(blink::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) {
NPObject* object = NPVARIANT_TO_OBJECT(iter->second);
// De-associate from the existing V8 wrapper, so we don't pull any
// of the wrapper's custom properties into the context of the page we
// have navigated to.
// 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, object);
void JavaBridgeDispatcher::OnAddNamedObject(
const base::string16& name,
const NPVariant_Param& variant_param) {
if (!channel_.get()) {
// It's possible for |channel_| to be NULL if the RenderView is going away.
// 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_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()) {
objects_[name] = variant;
void JavaBridgeDispatcher::OnRemoveNamedObject(const base::string16& name) {
if (!channel_.get()) {
// 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());
} // namespace content