content/browser/devtools/devtools_agent_host_impl.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/devtools/devtools_agent_host_impl.h"
   6
   7 #include <map>
   8 #include <vector>
   9
  10 #include "base/basictypes.h"
  11 #include "base/guid.h"
  12 #include "base/lazy_instance.h"
  13 #include "content/browser/devtools/devtools_manager.h"
  14 #include "content/browser/devtools/embedded_worker_devtools_manager.h"
  15 #include "content/browser/devtools/forwarding_agent_host.h"
  16 #include "content/public/browser/browser_thread.h"
  17 #include "content/public/browser/devtools_manager_delegate.h"
  18
  19 namespace content {
  20
  21 namespace {
  22 typedef std::map<std::string, DevToolsAgentHostImpl*> Instances;
  23 base::LazyInstance<Instances>::Leaky g_instances = LAZY_INSTANCE_INITIALIZER;
  24
  25 typedef std::vector<const DevToolsAgentHost::AgentStateCallback*>
  26     AgentStateCallbacks;
  27 base::LazyInstance<AgentStateCallbacks>::Leaky g_callbacks =
  28     LAZY_INSTANCE_INITIALIZER;
  29 }  // namespace
  30
  31 // static
  32 DevToolsAgentHost::List DevToolsAgentHost::GetOrCreateAll() {
  33   List result = EmbeddedWorkerDevToolsManager::GetInstance()
  34       ->GetOrCreateAllAgentHosts();
  35   std::vector<WebContents*> wc_list =
  36       DevToolsAgentHostImpl::GetInspectableWebContents();
  37   for (std::vector<WebContents*>::iterator it = wc_list.begin();
  38       it != wc_list.end(); ++it) {
  39     result.push_back(GetOrCreateFor(*it));
  40   }
  41   return result;
  42 }
  43
  44 DevToolsAgentHostImpl::DevToolsAgentHostImpl()
  45     : id_(base::GenerateGUID()),
  46       client_(NULL) {
  47   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  48   g_instances.Get()[id_] = this;
  49 }
  50
  51 DevToolsAgentHostImpl::~DevToolsAgentHostImpl() {
  52   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  53   g_instances.Get().erase(g_instances.Get().find(id_));
  54 }
  55
  56 // static
  57 scoped_refptr<DevToolsAgentHost> DevToolsAgentHost::GetForId(
  58     const std::string& id) {
  59   if (g_instances == NULL)
  60     return NULL;
  61   Instances::iterator it = g_instances.Get().find(id);
  62   if (it == g_instances.Get().end())
  63     return NULL;
  64   return it->second;
  65 }
  66
  67 //static
  68 scoped_refptr<DevToolsAgentHost> DevToolsAgentHost::Create(
  69     DevToolsExternalAgentProxyDelegate* delegate) {
  70   return new ForwardingAgentHost(delegate);
  71 }
  72
  73 void DevToolsAgentHostImpl::AttachClient(DevToolsAgentHostClient* client) {
  74   scoped_refptr<DevToolsAgentHostImpl> protect(this);
  75   if (client_) {
  76     client_->AgentHostClosed(this, true);
  77     Detach();
  78   }
  79   client_ = client;
  80   Attach();
  81   DevToolsManager::GetInstance()->AgentHostChanged(this);
  82 }
  83
  84 void DevToolsAgentHostImpl::DetachClient() {
  85   if (!client_)
  86     return;
  87
  88   scoped_refptr<DevToolsAgentHostImpl> protect(this);
  89   client_ = NULL;
  90   Detach();
  91   DevToolsManager::GetInstance()->AgentHostChanged(this);
  92 }
  93
  94 bool DevToolsAgentHostImpl::IsAttached() {
  95   return !!client_;
  96 }
  97
  98 void DevToolsAgentHostImpl::InspectElement(int x, int y) {
  99 }
 100
 101 std::string DevToolsAgentHostImpl::GetId() {
 102   return id_;
 103 }
 104
 105 WebContents* DevToolsAgentHostImpl::GetWebContents() {
 106   return NULL;
 107 }
 108
 109 void DevToolsAgentHostImpl::DisconnectWebContents() {
 110 }
 111
 112 void DevToolsAgentHostImpl::ConnectWebContents(WebContents* wc) {
 113 }
 114
 115 bool DevToolsAgentHostImpl::IsWorker() const {
 116   return false;
 117 }
 118
 119 void DevToolsAgentHostImpl::HostClosed() {
 120   if (!client_)
 121     return;
 122
 123   scoped_refptr<DevToolsAgentHostImpl> protect(this);
 124   // Clear |client_| before notifying it.
 125   DevToolsAgentHostClient* client = client_;
 126   client_ = NULL;
 127   client->AgentHostClosed(this, false);
 128   DevToolsManager::GetInstance()->AgentHostChanged(this);
 129 }
 130
 131 void DevToolsAgentHostImpl::SendMessageToClient(const std::string& message) {
 132   if (!client_)
 133     return;
 134   client_->DispatchProtocolMessage(this, message);
 135 }
 136
 137 // static
 138 void DevToolsAgentHost::DetachAllClients() {
 139   if (g_instances == NULL)
 140     return;
 141
 142   // Make a copy, since detaching may lead to agent destruction, which
 143   // removes it from the instances.
 144   Instances copy = g_instances.Get();
 145   for (Instances::iterator it(copy.begin()); it != copy.end(); ++it) {
 146     DevToolsAgentHostImpl* agent_host = it->second;
 147     if (agent_host->client_) {
 148       scoped_refptr<DevToolsAgentHostImpl> protect(agent_host);
 149       // Clear |client_| before notifying it.
 150       DevToolsAgentHostClient* client = agent_host->client_;
 151       agent_host->client_ = NULL;
 152       client->AgentHostClosed(agent_host, true);
 153       agent_host->Detach();
 154       DevToolsManager::GetInstance()->AgentHostChanged(protect);
 155     }
 156   }
 157 }
 158
 159 // static
 160 void DevToolsAgentHost::AddAgentStateCallback(
 161     const AgentStateCallback& callback) {
 162   g_callbacks.Get().push_back(&callback);
 163 }
 164
 165 // static
 166 void DevToolsAgentHost::RemoveAgentStateCallback(
 167     const AgentStateCallback& callback) {
 168   if (g_callbacks == NULL)
 169     return;
 170
 171   AgentStateCallbacks* callbacks_ = g_callbacks.Pointer();
 172   AgentStateCallbacks::iterator it =
 173       std::find(callbacks_->begin(), callbacks_->end(), &callback);
 174   DCHECK(it != callbacks_->end());
 175   callbacks_->erase(it);
 176 }
 177
 178 // static
 179 void DevToolsAgentHostImpl::NotifyCallbacks(
 180     DevToolsAgentHostImpl* agent_host, bool attached) {
 181   AgentStateCallbacks copy(g_callbacks.Get());
 182   DevToolsManager* manager = DevToolsManager::GetInstance();
 183   if (manager->delegate())
 184     manager->delegate()->DevToolsAgentStateChanged(agent_host, attached);
 185   for (AgentStateCallbacks::iterator it = copy.begin(); it != copy.end(); ++it)
 186      (*it)->Run(agent_host, attached);
 187 }
 188
 189 void DevToolsAgentHostImpl::Inspect(BrowserContext* browser_context) {
 190   DevToolsManager* manager = DevToolsManager::GetInstance();
 191   if (manager->delegate())
 192     manager->delegate()->Inspect(browser_context, this);
 193 }
 194
 195 }  // namespace content