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// Copyright (c) 2009 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.
// DevToolsAgent belongs to the inspectable renderer and provides Glue's
// agents with the communication capabilities. All messages from/to Glue's
// agents infrastructure are flowing through this comminucation agent.
//
// DevToolsAgent is registered as an IPC filter in order to be able to
// dispatch messages while on the IO thread. The reason for that is that while
// debugging, Render thread is being held by the v8 and hence no messages
// are being dispatched there. While holding the thread in a tight loop,
// v8 provides thread-safe Api for controlling debugger. In our case v8's Api
// is being used from this communication agent on the IO thread.
#include "chrome/renderer/devtools_agent.h"
#include "base/message_loop.h"
#include "chrome/common/render_messages.h"
#include "chrome/renderer/devtools_messages.h"
// TODO(yurys): remove this macros once plugins available on other platforms
#if defined(OS_WIN)
#include "chrome/renderer/plugin_channel_host.h"
#endif // OS_WIN
#include "chrome/renderer/render_process.h"
#include "chrome/renderer/render_view.h"
#include "webkit/glue/webdevtoolsagent.h"
DevToolsAgent::DevToolsAgent(int routing_id,
RenderView* view,
MessageLoop* view_loop)
: routing_id_(routing_id),
view_(view),
view_loop_(view_loop),
io_loop_(NULL) {
}
DevToolsAgent::~DevToolsAgent() {
}
// Called on render thread.
void DevToolsAgent::RenderViewDestroyed() {
DCHECK(MessageLoop::current() == view_loop_);
view_ = NULL;
}
void DevToolsAgent::Send(const IPC::Message& tools_client_message) {
DCHECK(MessageLoop::current() == view_loop_);
if (!view_) {
return;
}
IPC::Message* m = new ViewHostMsg_ForwardToDevToolsClient(
routing_id_,
tools_client_message);
view_->Send(m);
}
// Called on the IO thread.
void DevToolsAgent::OnFilterAdded(IPC::Channel* channel) {
io_loop_ = MessageLoop::current();
}
// Called on the IO thread.
bool DevToolsAgent::OnMessageReceived(const IPC::Message& message) {
DCHECK(MessageLoop::current() == io_loop_);
if (message.routing_id() != routing_id_)
return false;
// TODO(yurys): only DebuggerCommand message is handled on the IO thread
// all other messages could be handled in RenderView::OnMessageReceived. With
// that approach we wouldn't have to call view_loop_->PostTask for each of the
// messages.
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(DevToolsAgent, message)
IPC_MESSAGE_HANDLER(DevToolsAgentMsg_Attach, OnAttach)
IPC_MESSAGE_HANDLER(DevToolsAgentMsg_Detach, OnDetach)
IPC_MESSAGE_HANDLER(DevToolsAgentMsg_RpcMessage, OnRpcMessage)
IPC_MESSAGE_HANDLER(DevToolsAgentMsg_DebuggerCommand,
OnDebuggerCommand)
IPC_MESSAGE_HANDLER(DevToolsAgentMsg_InspectElement, OnInspectElement)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
// Called on the IO thread.
void DevToolsAgent::OnFilterRemoved() {
io_loop_ = NULL;
}
void DevToolsAgent::EvaluateScript(const std::wstring& script) {
DCHECK(MessageLoop::current() == view_loop_);
// view_ may have been cleared after this method execution was scheduled.
if (view_)
view_->EvaluateScript(L"", script);
}
void DevToolsAgent::OnAttach() {
view_loop_->PostTask(FROM_HERE, NewRunnableMethod(
this, &DevToolsAgent::Attach));
}
void DevToolsAgent::OnDetach() {
view_loop_->PostTask(FROM_HERE, NewRunnableMethod(
this, &DevToolsAgent::Detach));
}
void DevToolsAgent::SendMessageToClient(const std::string& raw_msg) {
Send(DevToolsClientMsg_RpcMessage(raw_msg));
}
void DevToolsAgent::OnRpcMessage(const std::string& raw_msg) {
view_loop_->PostTask(FROM_HERE, NewRunnableMethod(
this, &DevToolsAgent::DispatchRpcMessage, raw_msg));
}
void DevToolsAgent::OnInspectElement(int x, int y) {
view_loop_->PostTask(FROM_HERE, NewRunnableMethod(
this, &DevToolsAgent::InspectElement, x, y));
}
void DevToolsAgent::Attach() {
WebDevToolsAgent* web_agent = GetWebAgent();
if (web_agent) {
web_agent->Attach();
}
}
void DevToolsAgent::Detach() {
WebDevToolsAgent* web_agent = GetWebAgent();
if (web_agent) {
web_agent->Detach();
}
}
void DevToolsAgent::DispatchRpcMessage(const std::string& raw_msg) {
WebDevToolsAgent* web_agent = GetWebAgent();
if (web_agent) {
web_agent->DispatchMessageFromClient(raw_msg);
}
}
void DevToolsAgent::OnDebuggerCommand(const std::string& command) {
// Debugger commands are handled on the IO thread.
WebDevToolsAgent::ExecuteDebuggerCommand(command);
}
void DevToolsAgent::InspectElement(int x, int y) {
WebDevToolsAgent* web_agent = GetWebAgent();
if (web_agent) {
web_agent->InspectElement(x, y);
}
}
WebDevToolsAgent* DevToolsAgent::GetWebAgent() {
if (!view_)
return NULL;
WebView* web_view = view_->webview();
if (!web_view)
return NULL;
return web_view->GetWebDevToolsAgent();
}
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