DevTools: introduce browser domain for basic target discovery.

content/browser/devtools/protocol/browser_handler.cc

+// Copyright 2016 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/devtools/protocol/browser_handler.h"
+
+namespace content {
+namespace devtools {
+namespace browser {
+
+namespace {
+const char kTargetTypeWebContents[] = "web_contents";
+const char kTargetTypeFrame[] = "frame";
+const char kTargetTypeSharedWorker[] = "shared_worker";
+const char kTargetTypeServiceWorker[] = "service_worker";
+const char kTargetTypeServiceOther[] = "other";
+}
+
+using Response = DevToolsProtocolClient::Response;
+
+BrowserHandler::BrowserHandler() {
+}
+
+BrowserHandler::~BrowserHandler() {
+}
+
+void BrowserHandler::SetClient(std::unique_ptr<Client> client) {
+  client_.swap(client);
+}
+
+static std::string GetTypeString(DevToolsAgentHost* agent_host) {
+  switch (agent_host->GetType()) {
+    case DevToolsAgentHost::TYPE_WEB_CONTENTS:
+      return kTargetTypeWebContents;
+    case DevToolsAgentHost::TYPE_FRAME:
+      return kTargetTypeFrame;
+    case DevToolsAgentHost::TYPE_SHARED_WORKER:
+      return kTargetTypeSharedWorker;
+    case DevToolsAgentHost::TYPE_SERVICE_WORKER:
+      return kTargetTypeServiceWorker;
+    default:
+      return kTargetTypeServiceOther;
+  }
+}
+
+Response BrowserHandler::GetTargets(TargetInfos* infos) {
+  DevToolsAgentHost::List agents = DevToolsAgentHost::GetOrCreateAll();
+  for (DevToolsAgentHost::List::iterator it = agents.begin();
+       it != agents.end(); ++it) {
+    DevToolsAgentHost* agent_host = (*it).get();
+    scoped_refptr<devtools::browser::TargetInfo> info =
+        devtools::browser::TargetInfo::Create()->
+            set_target_id(agent_host->GetId())->
+            set_type(GetTypeString(agent_host))->
+            set_title(agent_host->GetTitle())->
+            set_url(agent_host->GetURL().spec());
+  }
+  return Response::OK();
+}
+
+Response BrowserHandler::Attach(const std::string& targetId) {
+  scoped_refptr<DevToolsAgentHost> agent_host =
+      DevToolsAgentHost::GetForId(targetId);
+  if (!agent_host)
+    return Response::ServerError("No host with given id found");
+  bool success = agent_host->AttachClient(this);
+  return success ? Response::OK() :
+                   Response::ServerError("Host is already being debugged");

[dgozman, 2016/06/08 03:53:29]

s/Host/Target in error messages

[pfeldman, 2016/06/08 15:54:52]

Done.

+}
+
+Response BrowserHandler::Detach(const std::string& targetId) {
+  scoped_refptr<DevToolsAgentHost> agent_host =
+      DevToolsAgentHost::GetForId(targetId);
+  if (!agent_host)
+    return Response::ServerError("No host with given id found");
+  bool success = agent_host->DetachClient(this);
+  return success ? Response::OK() :
+                   Response::ServerError("Host is not being debugged");
+}
+
+Response BrowserHandler::SendMessage(const std::string& targetId,
+                                     const std::string& message) {
+  scoped_refptr<DevToolsAgentHost> agent_host =
+      DevToolsAgentHost::GetForId(targetId);
+  if (!agent_host)
+    return Response::ServerError("No host with given id found");
+  agent_host->DispatchProtocolMessage(message);
+  return Response::OK();
+}
+
+void BrowserHandler::DispatchProtocolMessage(
+    DevToolsAgentHost* agent_host, const std::string& message) {
+  client_->DispatchMessage(DispatchMessageParams::Create()->
+      set_target_id(agent_host->GetId())->
+      set_message(message));
+}
+
+void BrowserHandler::AgentHostClosed(DevToolsAgentHost* agent_host,
+                                     bool replaced_with_another_client) {
+}

[dgozman, 2016/06/08 03:53:29]

Should we send "detached" event to the target? But then, we should also send
"closed" event.

[pfeldman, 2016/06/08 15:54:52]

Don't we deliver detach reason already or should I do this right here?

[dgozman, 2016/06/08 15:59:09]

We already do. I think it may be better to deliver if we go down the discovery
way, but let's wait with it.

+
+

[dgozman, 2016/06/08 03:53:29]

nit: extra blank line

[pfeldman, 2016/06/08 15:54:52]

Done.

+}  // namespace browser
+}  // namespace devtools
+}  // namespace content