Extract debugger target enumeration into a separate class

content/browser/devtools/devtools_http_handler_impl.cc

Index: content/browser/devtools/devtools_http_handler_impl.cc
diff --git a/content/browser/devtools/devtools_http_handler_impl.cc b/content/browser/devtools/devtools_http_handler_impl.cc
index 665d01f9cfe6dbdcb2b36fe61406819b961eb5c6..d8c36220de402057361c1980c77b2f9c5904459b 100644
--- a/content/browser/devtools/devtools_http_handler_impl.cc
+++ b/content/browser/devtools/devtools_http_handler_impl.cc
@@ -15,11 +15,7 @@
 #include "base/logging.h"
 #include "base/message_loop_proxy.h"
 #include "base/string_number_conversions.h"
-#include "base/stringprintf.h"
 #include "base/threading/thread.h"
-#include "base/utf_string_conversions.h"
-#include "base/values.h"
-#include "content/browser/devtools/devtools_agent_host_impl.h"
 #include "content/browser/devtools/devtools_browser_target.h"
 #include "content/browser/devtools/devtools_tracing_handler.h"
 #include "content/browser/web_contents/web_contents_impl.h"
@@ -27,20 +23,15 @@
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/devtools_agent_host.h"
 #include "content/public/browser/devtools_client_host.h"
-#include "content/public/browser/devtools_http_handler_delegate.h"
 #include "content/public/browser/devtools_manager.h"
-#include "content/public/browser/favicon_status.h"
-#include "content/public/browser/navigation_entry.h"
+#include "content/public/browser/devtools_target_list.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
-#include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
-#include "content/public/browser/render_widget_host.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/url_constants.h"
 #include "googleurl/src/gurl.h"
 #include "grit/devtools_resources_map.h"
-#include "net/base/escape.h"
 #include "net/base/io_buffer.h"
 #include "net/base/ip_endpoint.h"
 #include "net/server/http_server_request_info.h"
@@ -64,37 +55,15 @@ class DevToolsDefaultBindingHandler
   DevToolsDefaultBindingHandler() {
   }
 
-  void GarbageCollect() {
-    AgentsMap::iterator it = agents_map_.begin();
-    while (it != agents_map_.end()) {
-      if (!it->second->GetRenderViewHost())
-        agents_map_.erase(it++);
-      else
-        ++it;
-    }
-  }
-
   virtual std::string GetIdentifier(DevToolsAgentHost* agent_host) OVERRIDE {
-    GarbageCollect();
-    DevToolsAgentHostImpl* agent_host_impl =
-        static_cast<DevToolsAgentHostImpl*>(agent_host);
-    std::string id = base::StringPrintf("%d", agent_host_impl->id());
-    agents_map_[id] = agent_host;
-    return id;
+    DevToolsTargetList::GetInstance()->Register(agent_host);
+    return agent_host->id();
   }
 
   virtual DevToolsAgentHost* ForIdentifier(
       const std::string& identifier) OVERRIDE {
-    GarbageCollect();
-    AgentsMap::iterator it = agents_map_.find(identifier);
-    if (it != agents_map_.end())
-      return it->second;
-    return NULL;
+    return DevToolsTargetList::GetInstance()->Lookup(identifier);
   }
-
- private:
-  typedef std::map<std::string, scoped_refptr<DevToolsAgentHost> > AgentsMap;
-  AgentsMap agents_map_;
 };
 
 // An internal implementation of DevToolsClientHost that delegates
@@ -156,6 +125,24 @@ class DevToolsClientHostImpl : public DevToolsClientHost {
   std::string detach_reason_;
 };
 
+static base::TimeTicks GetLastSelectedTime(DevToolsAgentHost* agent) {
+  RenderViewHost* rvh = agent->GetRenderViewHost();
+  if (!rvh)
+    return base::TimeTicks();
+
+  WebContents* web_contents = rvh->GetDelegate()->GetAsWebContents();
+  if (!web_contents)
+    return base::TimeTicks();
+
+  return web_contents->GetLastSelectedTime();
+}
+
+typedef std::pair<DevToolsAgentHost*, base::TimeTicks> PageInfo;
+
+static bool TimeComparator(const PageInfo& info1, const PageInfo& info2) {
+  return info1.second > info2.second;
+}
+
 }  // namespace
 
 // static
@@ -394,55 +381,6 @@ void DevToolsHttpHandlerImpl::OnClose(int connection_id) {
           connection_id));
 }
 
-struct DevToolsHttpHandlerImpl::PageInfo {
-  PageInfo()
-      : attached(false) {
-  }
-
-  std::string id;
-  std::string url;
-  std::string type;
-  bool attached;
-  std::string title;
-  std::string thumbnail_url;
-  std::string favicon_url;
-  base::TimeTicks last_selected_time;
-};
-
-// static
-bool DevToolsHttpHandlerImpl::SortPageListByTime(const PageInfo& info1,
-                                                 const PageInfo& info2) {
-  return info1.last_selected_time > info2.last_selected_time;
-}
-
-DevToolsHttpHandlerImpl::PageList DevToolsHttpHandlerImpl::GeneratePageList() {
-  PageList page_list;
-  for (RenderProcessHost::iterator it(RenderProcessHost::AllHostsIterator());
-       !it.IsAtEnd(); it.Advance()) {
-    RenderProcessHost* render_process_host = it.GetCurrentValue();
-    DCHECK(render_process_host);
-
-    // Ignore processes that don't have a connection, such as crashed contents.
-    if (!render_process_host->HasConnection())
-      continue;
-
-    RenderProcessHost::RenderWidgetHostsIterator rwit(
-        render_process_host->GetRenderWidgetHostsIterator());
-    for (; !rwit.IsAtEnd(); rwit.Advance()) {
-      const RenderWidgetHost* widget = rwit.GetCurrentValue();
-      DCHECK(widget);
-      if (!widget || !widget->IsRenderView())
-        continue;
-
-      RenderViewHost* host =
-          RenderViewHost::From(const_cast<RenderWidgetHost*>(widget));
-      page_list.push_back(CreatePageInfo(host, delegate_->GetTargetType(host)));
-    }
-  }
-  std::sort(page_list.begin(), page_list.end(), SortPageListByTime);
-  return page_list;
-}
-
 std::string DevToolsHttpHandlerImpl::GetFrontendURLInternal(
     const std::string rvh_id,
     const std::string& host) {
@@ -526,11 +464,23 @@ void DevToolsHttpHandlerImpl::OnJsonRequestUI(
   }
 
   if (command == "list") {
-    PageList page_list = GeneratePageList();
+    typedef std::vector<PageInfo> PageList;
+    PageList page_list;
+
+    DevToolsTargetList* target_list = DevToolsTargetList::GetInstance();
+    target_list->Refresh();
+    for (DevToolsTargetList::AgentsMap::iterator i = target_list->begin();
+         i != target_list->end(); ++i) {
+      DevToolsAgentHost* agent_host = i->second;
+      page_list.push_back(
+          PageInfo(agent_host, GetLastSelectedTime(agent_host)));
+    }
+    std::sort(page_list.begin(), page_list.end(), TimeComparator);
+
     base::ListValue json_pages_list;
     std::string host = info.headers["Host"];
     for (PageList::iterator i = page_list.begin(); i != page_list.end(); ++i)
-      json_pages_list.Append(SerializePageInfo(*i, host));
+      json_pages_list.Append(SerializePageInfo(i->first, host));
     SendJson(connection_id, net::HTTP_OK, &json_pages_list, "", jsonp);
     return;
   }
@@ -545,11 +495,9 @@ void DevToolsHttpHandlerImpl::OnJsonRequestUI(
                jsonp);
       return;
     }
-    PageInfo page_info =
-        CreatePageInfo(rvh, DevToolsHttpHandlerDelegate::kTargetTypeTab);
     std::string host = info.headers["Host"];
     scoped_ptr<base::DictionaryValue> dictionary(
-        SerializePageInfo(page_info, host));
+        SerializePageInfo(DevToolsAgentHost::GetFor(rvh), host));
     SendJson(connection_id, net::HTTP_OK, dictionary.get(), "", jsonp);
     return;
   }
@@ -837,59 +785,32 @@ void DevToolsHttpHandlerImpl::AcceptWebSocket(
                  connection_id, request));
 }
 
-DevToolsHttpHandlerImpl::PageInfo
-DevToolsHttpHandlerImpl::CreatePageInfo(RenderViewHost* rvh,
-    DevToolsHttpHandlerDelegate::TargetType type) {
-  RenderViewHostDelegate* host_delegate = rvh->GetDelegate();
-  scoped_refptr<DevToolsAgentHost> agent(DevToolsAgentHost::GetFor(rvh));
-  DevToolsClientHost* client_host = DevToolsManager::GetInstance()->
-      GetDevToolsClientHostFor(agent);
-  PageInfo page_info;
-  page_info.id = binding_->GetIdentifier(agent);
-  page_info.attached = client_host != NULL;
-  page_info.url = host_delegate->GetURL().spec();
-
-  switch (type) {
+base::DictionaryValue* DevToolsHttpHandlerImpl::SerializePageInfo(
+    DevToolsAgentHost* agent_host,
+    const std::string& host) {
+  base::DictionaryValue* dictionary = new base::DictionaryValue;
+  dictionary->SetString("title", agent_host->title());
+  dictionary->SetString("url", agent_host->url().spec());
+  switch (delegate_->GetTargetType(agent_host->GetRenderViewHost())) {
     case DevToolsHttpHandlerDelegate::kTargetTypeTab:
-      page_info.type = "page";
+      dictionary->SetString("type", "page");
       break;
     default:
-      page_info.type = "other";
+      dictionary->SetString("type", "other");
   }
-
-  WebContents* web_contents = host_delegate->GetAsWebContents();
-  if (web_contents) {
-    page_info.title = UTF16ToUTF8(
-        net::EscapeForHTML(web_contents->GetTitle()));
-    page_info.last_selected_time = web_contents->GetLastSelectedTime();
-
-    NavigationController& controller = web_contents->GetController();
-    NavigationEntry* entry = controller.GetActiveEntry();
-    if (entry != NULL && entry->GetURL().is_valid()) {
-      page_info.thumbnail_url = "/thumb/" + entry->GetURL().spec();
-      page_info.favicon_url = entry->GetFavicon().url.spec();
-    }
-  }
-  return page_info;
-}
-
-base::DictionaryValue* DevToolsHttpHandlerImpl::SerializePageInfo(
-    const PageInfo& page_info,
-    const std::string& host) {
-  base::DictionaryValue* dictionary = new base::DictionaryValue;
-  dictionary->SetString("title", page_info.title);
-  dictionary->SetString("url", page_info.url);
-  dictionary->SetString("type", page_info.type);
-  dictionary->SetString("id", page_info.id);
-  dictionary->SetString("thumbnailUrl", page_info.thumbnail_url);
-  dictionary->SetString("faviconUrl", page_info.favicon_url);
-  if (!page_info.attached) {
+  std::string id = binding_->GetIdentifier(agent_host);
+  dictionary->SetString("id", id);
+  const GURL thumbnail_url = agent_host->thumbnail_url();
+  dictionary->SetString("thumbnailUrl",
+      std::string("/") + thumbnail_url.host() + thumbnail_url.path());
+  dictionary->SetString("faviconUrl", agent_host->favicon_url().spec());
+  if (!DevToolsManager::GetInstance()->GetDevToolsClientHostFor(agent_host)) {
     dictionary->SetString("webSocketDebuggerUrl",
                           base::StringPrintf("ws://%s/devtools/page/%s",
                                              host.c_str(),
-                                             page_info.id.c_str()));
+                                             id.c_str()));
     std::string devtools_frontend_url = GetFrontendURLInternal(
-        page_info.id.c_str(),
+        id.c_str(),
         host);
     dictionary->SetString("devtoolsFrontendUrl", devtools_frontend_url);
   }