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// Copyright 2014 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/gin_java_bridge_dispatcher.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/utf_string_conversions.h"
#include "content/common/gin_java_bridge_messages.h"
#include "content/public/renderer/render_frame.h"
#include "content/renderer/java/gin_java_bridge_object.h"
#include "third_party/WebKit/public/web/WebLocalFrame.h"
#include "third_party/WebKit/public/web/WebView.h"
namespace content {
GinJavaBridgeDispatcher::GinJavaBridgeDispatcher(RenderFrame* render_frame)
: RenderFrameObserver(render_frame),
inside_did_clear_window_object_(false) {
}
GinJavaBridgeDispatcher::~GinJavaBridgeDispatcher() {
}
bool GinJavaBridgeDispatcher::OnMessageReceived(const IPC::Message& msg) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(GinJavaBridgeDispatcher, msg)
IPC_MESSAGE_HANDLER(GinJavaBridgeMsg_AddNamedObject, OnAddNamedObject)
IPC_MESSAGE_HANDLER(GinJavaBridgeMsg_RemoveNamedObject, OnRemoveNamedObject)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
namespace {
class ScopedFlag {
public:
ScopedFlag(bool* flag) : flag_(flag) {
DCHECK(!*flag_);
*flag_ = true;
}
~ScopedFlag() {
DCHECK(*flag_);
*flag_ = false;
}
private:
bool* flag_;
DISALLOW_COPY_AND_ASSIGN(ScopedFlag);
};
} // namespace
void GinJavaBridgeDispatcher::DidClearWindowObject() {
// Accessing window object when adding properties to it may trigger
// a nested call to DidClearWindowObject.
if (inside_did_clear_window_object_)
return;
ScopedFlag flag(&inside_did_clear_window_object_);
for (NamedObjectMap::const_iterator iter = named_objects_.begin();
iter != named_objects_.end(); ++iter) {
// Always create a new GinJavaBridgeObject, so we don't pull any of the V8
// wrapper's custom properties into the context of the page we have
// navigated to. The old GinJavaBridgeObject will be automatically
// deleted after its wrapper will be collected.
// On the browser side, we ignore wrapper deletion events for named objects,
// as they are only removed upon embedder's request (RemoveNamedObject).
if (objects_.Lookup(iter->second))
objects_.Remove(iter->second);
GinJavaBridgeObject* object = GinJavaBridgeObject::InjectNamed(
render_frame()->GetWebFrame(), AsWeakPtr(), iter->first, iter->second);
if (object) {
objects_.AddWithID(object, iter->second);
} else {
// Inform the host about wrapper creation failure.
render_frame()->Send(new GinJavaBridgeHostMsg_ObjectWrapperDeleted(
routing_id(), iter->second));
}
}
}
void GinJavaBridgeDispatcher::OnAddNamedObject(
const std::string& name,
ObjectID object_id) {
// Added objects only become available after page reload, so here they
// are only added into the internal map.
named_objects_.insert(std::make_pair(name, object_id));
}
void GinJavaBridgeDispatcher::OnRemoveNamedObject(const std::string& name) {
// Removal becomes in effect on next reload. We simply removing the entry
// from the map here.
NamedObjectMap::iterator iter = named_objects_.find(name);
DCHECK(iter != named_objects_.end());
named_objects_.erase(iter);
}
void GinJavaBridgeDispatcher::GetJavaMethods(
ObjectID object_id,
std::set<std::string>* methods) {
render_frame()->Send(new GinJavaBridgeHostMsg_GetMethods(
routing_id(), object_id, methods));
}
bool GinJavaBridgeDispatcher::HasJavaMethod(ObjectID object_id,
const std::string& method_name) {
bool result;
render_frame()->Send(new GinJavaBridgeHostMsg_HasMethod(
routing_id(), object_id, method_name, &result));
return result;
}
scoped_ptr<base::Value> GinJavaBridgeDispatcher::InvokeJavaMethod(
ObjectID object_id,
const std::string& method_name,
const base::ListValue& arguments,
GinJavaBridgeError* error) {
base::ListValue result_wrapper;
render_frame()->Send(
new GinJavaBridgeHostMsg_InvokeMethod(routing_id(),
object_id,
method_name,
arguments,
&result_wrapper,
error));
base::Value* result;
if (result_wrapper.Get(0, &result)) {
return scoped_ptr<base::Value>(result->DeepCopy());
} else {
return scoped_ptr<base::Value>();
}
}
GinJavaBridgeObject* GinJavaBridgeDispatcher::GetObject(ObjectID object_id) {
GinJavaBridgeObject* result = objects_.Lookup(object_id);
if (!result) {
result = GinJavaBridgeObject::InjectAnonymous(AsWeakPtr(), object_id);
if (result)
objects_.AddWithID(result, object_id);
}
return result;
}
void GinJavaBridgeDispatcher::OnGinJavaBridgeObjectDeleted(ObjectID object_id) {
if (!objects_.Lookup(object_id))
return;
objects_.Remove(object_id);
render_frame()->Send(
new GinJavaBridgeHostMsg_ObjectWrapperDeleted(routing_id(), object_id));
}
} // namespace content
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