DevTools: add initial support for shared workers debugging

content/browser/debugger/worker_devtools_manager.cc

+// 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/debugger/worker_devtools_manager.h"
+
+#include <list>
+
+#include "base/tuple.h"
+#include "chrome/browser/profiles/profile_manager.h"
+#include "content/browser/browser_thread.h"
+#include "content/browser/debugger/devtools_manager.h"
+#include "content/browser/debugger/devtools_window.h"
+#include "content/browser/debugger/worker_devtools_message_filter.h"
+#include "content/browser/worker_host/worker_process_host.h"
+#include "content/common/devtools_messages.h"
+
+class WorkerDevToolsManager::DevToolsWorkerIds {
+ public:
+  DevToolsWorkerIds() : next_id_(1) {}
+
+  int CreateDevToolsId(WorkerProcessHost* host, int route_id) {
+    DCHECK(-1 == FindDevToolsId(host->id(), route_id));
+    int devtools_id = next_id_++;
+    map_.push_back(Entry(host, route_id, devtools_id));
+    return devtools_id;
+  }
+
+  int FindDevToolsId(int worker_process_host_id, int route_id) {
+    for (IdMap::iterator it = map_.begin();
+         it != map_.end(); ++it) {
+      if (it->a->id() == worker_process_host_id && it->b == route_id)
+        return it->c;
+    }
+    return -1;
+  }
+
+  bool FindWorkerInfo(
+      int devtools_id,
+      WorkerProcessHost** host,
+      int* route_id) {
+    for (IdMap::iterator it = map_.begin();
+         it != map_.end(); ++it) {
+      if (it->c == devtools_id) {
+        *host = it->a;
+        *route_id = it->b;
+        return true;
+      }
+    }
+    return false;
+  }
+
+  bool TakeWorkerInfo(
+      int devtools_id,
+      WorkerProcessHost** host,
+      int* route_id) {
+    for (IdMap::iterator it = map_.begin();
+         it != map_.end(); ++it) {
+      if (it->c == devtools_id) {
+        *host = it->a;
+        *route_id = it->b;
+        map_.erase(it);
+        return true;
+      }
+    }
+    return false;
+  }
+
+  void WorkerDevToolsMessageFilterClosing(int worker_process_host_id) {
+    IdMap::iterator it = map_.begin();
+    while (it != map_.end()) {
+      if (it->a->id() == worker_process_host_id)
+        it = map_.erase(it);
+      else
+        ++it;
+    }
+  }
+
+ private:
+  int next_id_;
+  typedef Tuple3<WorkerProcessHost*, int, int> Entry;
+  typedef std::list<Entry> IdMap;
+  IdMap map_;
+  DISALLOW_COPY_AND_ASSIGN(DevToolsWorkerIds);
+};
+
+namespace {
+
+void ForwardToWorkerDevToolsAgentOnIOThread(
+    int worker_devtools_id,
+    const IPC::Message& message) {
+  WorkerDevToolsManager::GetInstance()->ForwardToWorkerDevToolsAgent(
+      worker_devtools_id, message);
+}
+
+void NotifyWorkerDevToolsClientClosingOnIOThread(int worker_devtools_id) {
+  WorkerDevToolsManager::GetInstance()->WorkerDevToolsClientClosing(
+      worker_devtools_id);
+}
+
+class WorkerDevToolsClients : public DevToolsClientHost::CloseListener {
+ public:
+  static WorkerDevToolsClients* GetInstance() {
+    static WorkerDevToolsClients* instance = new WorkerDevToolsClients();
+    return instance;
+  }
+
+  DevToolsClientHost* FindDevToolsClient(int worker_devtools_id) {
+    WorkerIdToClientHostMap::iterator it =
+        worker_id_to_client_host_.find(worker_devtools_id);
+    if (it == worker_id_to_client_host_.end())
+      return NULL;
+    return it->second;
+  }
+
+  int FindWorkerDevToolsId(DevToolsClientHost* client_host) {
+    for (WorkerIdToClientHostMap::const_iterator it =
+             worker_id_to_client_host_.begin();
+         it != worker_id_to_client_host_.end(); ++it) {
+      if (it->second == client_host)
+        return it->first;
+    }
+    return -1;
+  }
+
+  void RegisterDevToolsClientForWorker(
+      int worker_devtools_id,
+      DevToolsClientHost* client) {
+    client->set_close_listener(this);
+    worker_id_to_client_host_[worker_devtools_id] = client;
+  }
+
+ private:
+  WorkerDevToolsClients() {}
+  virtual ~WorkerDevToolsClients() {}
+
+  virtual void ClientHostClosing(DevToolsClientHost* host) {
+    WorkerIdToClientHostMap::iterator it = worker_id_to_client_host_.begin();
+    for (; it != worker_id_to_client_host_.end(); ++it) {
+      if (it->second == host) {
+        BrowserThread::PostTask(
+            BrowserThread::IO, FROM_HERE,
+            NewRunnableFunction(NotifyWorkerDevToolsClientClosingOnIOThread,
+                                it->first));
+        worker_id_to_client_host_.erase(it);
+        return;
+      }
+    }
+  }
+
+  typedef std::map<int, DevToolsClientHost*> WorkerIdToClientHostMap;
+  WorkerIdToClientHostMap worker_id_to_client_host_;
+
+  DISALLOW_COPY_AND_ASSIGN(WorkerDevToolsClients);
+};
+
+}  // namespace
+
+// static
+WorkerDevToolsManager* WorkerDevToolsManager::GetInstance() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  return Singleton<WorkerDevToolsManager>::get();
+}
+
+WorkerDevToolsManager::WorkerDevToolsManager()
+    : devtools_worker_ids_(new DevToolsWorkerIds()) {
+}
+
+WorkerDevToolsManager::~WorkerDevToolsManager() {
+}
+
+
+bool WorkerDevToolsManager::ForwardToWorkerDevToolsAgent(
+    DevToolsClientHost* from,
+    const IPC::Message& message) {
+  int worker_devtools_id = WorkerDevToolsClients::GetInstance()->
+      FindWorkerDevToolsId(from);
+  if (worker_devtools_id == -1)
+    return false;
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      NewRunnableFunction(
+          ForwardToWorkerDevToolsAgentOnIOThread,
+          worker_devtools_id,
+          IPC::Message(message)));
+  return true;
+}
+
+static void OpenDevToolsForWorkerOnUIThread(
+    int worker_devtools_id) {
+  Profile* profile = ProfileManager::GetDefaultProfile();
+  if (!profile)
+    return;
+  DevToolsWindow* window = DevToolsWindow::CreateDevToolsWindow(profile);
+  window->Show(DEVTOOLS_TOGGLE_ACTION_NONE);
+  WorkerDevToolsClients::GetInstance()->RegisterDevToolsClientForWorker(
+      worker_devtools_id, window);
+}
+
+static WorkerProcessHost* FindWorkerProcessHostForWorker(
+    int worker_process_host_id,
+    int worker_route_id) {
+  BrowserChildProcessHost::Iterator iter(ChildProcessInfo::WORKER_PROCESS);
+  for (; !iter.Done(); ++iter) {
+    if (iter->id() != worker_process_host_id)
+      continue;
+    WorkerProcessHost* worker = static_cast<WorkerProcessHost*>(*iter);
+    const WorkerProcessHost::Instances& instances = worker->instances();
+    for (WorkerProcessHost::Instances::const_iterator i = instances.begin();
+         i != instances.end(); ++i) {
+      if (i->shared() && i->worker_route_id() == worker_route_id)
+        return worker;
+    }
+    return NULL;
+  }
+  return NULL;
+}
+
+void WorkerDevToolsManager::OpenDevToolsForWorker(int worker_process_host_id,
+                                                  int worker_route_id) {
+  WorkerProcessHost* host = FindWorkerProcessHostForWorker(
+      worker_process_host_id,
+      worker_route_id);
+  if (!host)
+    return;
+
+  int devtools_id = devtools_worker_ids_->FindDevToolsId(
+      worker_process_host_id, worker_route_id);
+  // DevTools client is already attached.
+  if (devtools_id != -1)
+    return;
+
+  host->Send(new WorkerDevToolsAgentMsg_Attach(worker_route_id));
+
+  devtools_id = devtools_worker_ids_->CreateDevToolsId(
+      host, worker_route_id);
+  BrowserThread::PostTask(
+      BrowserThread::UI, FROM_HERE,
+      NewRunnableFunction(
+          OpenDevToolsForWorkerOnUIThread,
+          devtools_id));
+}
+
+void WorkerDevToolsManager::WorkerDevToolsClientClosing(
+    int worker_devtools_id) {
+  WorkerProcessHost* host;
+  int route_id;
+  if (!devtools_worker_ids_->TakeWorkerInfo(
+      worker_devtools_id, &host, &route_id))
+    return;
+  host->Send(new WorkerDevToolsAgentMsg_Detach(route_id));
+}
+
+static void ForwardToDevToolsClientOnUIThread(
+    int worker_devtools_id,
+    const IPC::Message& message) {
+  DevToolsClientHost* client = WorkerDevToolsClients::GetInstance()->
+      FindDevToolsClient(worker_devtools_id);
+  if (client)
+    client->SendMessageToClient(message);
+}
+
+void WorkerDevToolsManager::ForwardToDevToolsClient(
+    int worker_process_host_id,
+    int worker_route_id,
+    const IPC::Message& message) {
+  int devtools_id = devtools_worker_ids_->FindDevToolsId(
+      worker_process_host_id, worker_route_id);
+  DCHECK(devtools_id != -1);
+  if (devtools_id == -1)
+      return;
+  BrowserThread::PostTask(
+      BrowserThread::UI, FROM_HERE,
+      NewRunnableFunction(
+          ForwardToDevToolsClientOnUIThread,
+          devtools_id,
+          IPC::Message(message)));
+}
+
+void WorkerDevToolsManager::ForwardToWorkerDevToolsAgent(
+    int worker_devtools_id,
+    const IPC::Message& message) {
+  WorkerProcessHost* host;
+  int route_id;
+  if (!devtools_worker_ids_->FindWorkerInfo(
+      worker_devtools_id, &host, &route_id))
+    return;
+  IPC::Message* msg = new IPC::Message(message);
+  msg->set_routing_id(route_id);
+  host->Send(msg);
+}
+
+void WorkerDevToolsManager::WorkerProcessDestroying(
+    int worker_process_host_id) {
+  devtools_worker_ids_->WorkerDevToolsMessageFilterClosing(
+      worker_process_host_id);
+}
+