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_impl.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   } else {
  79     DevToolsManagerImpl::GetInstance()->OnClientAttached();
  80   }
  81   client_ = client;
  82   Attach();
  83 }
  84
  85 void DevToolsAgentHostImpl::DetachClient() {
  86   if (!client_)
  87     return;
  88
  89   scoped_refptr<DevToolsAgentHostImpl> protect(this);
  90   client_ = NULL;
  91   DevToolsManagerImpl::GetInstance()->OnClientDetached();
  92   Detach();
  93 }
  94
  95 bool DevToolsAgentHostImpl::IsAttached() {
  96   return !!client_;
  97 }
  98
  99 void DevToolsAgentHostImpl::InspectElement(int x, int y) {
 100 }
 101
 102 std::string DevToolsAgentHostImpl::GetId() {
 103   return id_;
 104 }
 105
 106 WebContents* DevToolsAgentHostImpl::GetWebContents() {
 107   return NULL;
 108 }
 109
 110 void DevToolsAgentHostImpl::DisconnectWebContents() {
 111 }
 112
 113 void DevToolsAgentHostImpl::ConnectWebContents(WebContents* wc) {
 114 }
 115
 116 bool DevToolsAgentHostImpl::IsWorker() const {
 117   return false;
 118 }
 119
 120 void DevToolsAgentHostImpl::HostClosed() {
 121   if (!client_)
 122     return;
 123
 124   scoped_refptr<DevToolsAgentHostImpl> protect(this);
 125   // Clear |client_| before notifying it.
 126   DevToolsAgentHostClient* client = client_;
 127   client_ = NULL;
 128   DevToolsManagerImpl::GetInstance()->OnClientDetached();
 129   client->AgentHostClosed(this, false);
 130 }
 131
 132 void DevToolsAgentHostImpl::SendMessageToClient(const std::string& message) {
 133   if (!client_)
 134     return;
 135   client_->DispatchProtocolMessage(this, message);
 136 }
 137
 138 // static
 139 void DevToolsAgentHost::DetachAllClients() {
 140   if (g_instances == NULL)
 141     return;
 142
 143   // Make a copy, since detaching may lead to agent destruction, which
 144   // removes it from the instances.
 145   Instances copy = g_instances.Get();
 146   for (Instances::iterator it(copy.begin()); it != copy.end(); ++it) {
 147     DevToolsAgentHostImpl* agent_host = it->second;
 148     if (agent_host->client_) {
 149       scoped_refptr<DevToolsAgentHostImpl> protect(agent_host);
 150       // Clear |client_| before notifying it.
 151       DevToolsAgentHostClient* client = agent_host->client_;
 152       agent_host->client_ = NULL;
 153       DevToolsManagerImpl::GetInstance()->OnClientDetached();
 154       client->AgentHostClosed(agent_host, true);
 155       agent_host->Detach();
 156     }
 157   }
 158 }
 159
 160 // static
 161 void DevToolsAgentHost::AddAgentStateCallback(
 162     const AgentStateCallback& callback) {
 163   g_callbacks.Get().push_back(&callback);
 164 }
 165
 166 // static
 167 void DevToolsAgentHost::RemoveAgentStateCallback(
 168     const AgentStateCallback& callback) {
 169   if (g_callbacks == NULL)
 170     return;
 171
 172   AgentStateCallbacks* callbacks_ = g_callbacks.Pointer();
 173   AgentStateCallbacks::iterator it =
 174       std::find(callbacks_->begin(), callbacks_->end(), &callback);
 175   DCHECK(it != callbacks_->end());
 176   callbacks_->erase(it);
 177 }
 178
 179 // static
 180 void DevToolsAgentHostImpl::NotifyCallbacks(
 181     DevToolsAgentHostImpl* agent_host, bool attached) {
 182   AgentStateCallbacks copy(g_callbacks.Get());
 183   DevToolsManagerImpl* manager = DevToolsManagerImpl::GetInstance();
 184   if (manager->delegate())
 185     manager->delegate()->DevToolsAgentStateChanged(agent_host, attached);
 186   for (AgentStateCallbacks::iterator it = copy.begin(); it != copy.end(); ++it)
 187      (*it)->Run(agent_host, attached);
 188 }
 189
 190 void DevToolsAgentHostImpl::Inspect(BrowserContext* browser_context) {
 191   DevToolsManagerImpl* manager = DevToolsManagerImpl::GetInstance();
 192   if (manager->delegate())
 193     manager->delegate()->Inspect(browser_context, this);
 194 }
 195
 196 }  // namespace content