DevTools: Protocol handler generator for content

BUG=405566

Review URL: https://codereview.chromium.org/508973003

Cr-Commit-Position: refs/heads/master@{#296694}

content/browser/BUILD.gn

@@ -84,6 +84,8 @@ source_set("browser") {
       "$root_gen_dir/ui/resources/grit/webui_resources_map.cc",
       "$root_gen_dir/content/browser/devtools/devtools_protocol_constants.cc",
       "$root_gen_dir/content/browser/devtools/devtools_protocol_constants.h",
+      "$root_gen_dir/content/browser/devtools/protocol/devtools_protocol_handler_impl.cc",
+      "$root_gen_dir/content/browser/devtools/protocol/devtools_protocol_handler_impl.h",
     ], ".")
 
     # Non-iOS deps.

content/browser/devtools/BUILD.gn

@@ -9,6 +9,7 @@ group("resources") {
   deps = [
     ":devtools_resources",
     ":devtools_protocol_constants",
+    ":devtools_protocol_handler",
   ]
 }
 
@@ -56,7 +57,31 @@ action("gen_devtools_protocol_constants") {
   ]
 }
 
+action("gen_devtools_protocol_handler") {
+  visibility = [ ":devtools_protocol_handler" ]
+
+  script = "//content/browser/devtools/protocol/" +
+      "devtools_protocol_handler_generator.py"
+
+  blink_protocol = "//third_party/WebKit/Source/devtools/protocol.json"
+  inputs = [ blink_protocol ]
+
+  outputs = [
+    "$target_gen_dir/protocol/devtools_protocol_handler_impl.cc",
+    "$target_gen_dir/protocol/devtools_protocol_handler_impl.h",
+  ]
+
+  args = [
+    rebase_path(blink_protocol, root_build_dir),
+  ] + rebase_path(outputs, root_build_dir)
+}
+
 source_set("devtools_protocol_constants") {
   visibility = [ ":resources" ]
   sources = get_target_outputs(":gen_devtools_protocol_constants")
 }
+
+source_set("devtools_protocol_handler") {
+  visibility = [ ":resources" ]
+  sources = get_target_outputs(":gen_devtools_protocol_handler")
+}

content/browser/devtools/devtools.gyp

@@ -0,0 +1,44 @@
+# Copyright 2014 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.
+
+{
+  'targets': [
+    {
+      'target_name': 'devtools_protocol_handler',
+      'type': 'none',
+      'actions': [
+        {
+          'action_name': 'devtools_protocol_handler',
+          'variables': {
+            'blink_protocol': '../../../third_party/WebKit/Source/devtools/protocol.json',
+            'generator': 'protocol/devtools_protocol_handler_generator.py',
+            'output_cc': '<(SHARED_INTERMEDIATE_DIR)/content/browser/devtools/protocol/devtools_protocol_handler_impl.cc',
+            'output_h': '<(SHARED_INTERMEDIATE_DIR)/content/browser/devtools/protocol/devtools_protocol_handler_impl.h',
+          },
+          'inputs': [
+            '<(blink_protocol)',
+            '<(generator)',
+          ],
+          'outputs': [
+            '<(output_cc)',
+            '<(output_h)',
+          ],
+          'action':[
+            'python',
+            '<(generator)',
+            '<(blink_protocol)',
+            '<(output_cc)',
+            '<(output_h)',
+          ],
+          'message': 'Generating DevTools protocol browser-side handlers from <(blink_protocol)'
+        },
+      ],
+      'direct_dependent_settings': {
+        'include_dirs': [
+          '<(SHARED_INTERMEDIATE_DIR)',
+        ]
+      },
+    },
+  ],
+}

content/browser/devtools/protocol/devtools_protocol_client.cc

@@ -0,0 +1,93 @@
+// Copyright 2014 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/devtools_protocol_client.h"
+
+namespace content {
+
+DevToolsProtocolClient::DevToolsProtocolClient(
+    const EventCallback& event_callback,
+    const ResponseCallback& response_callback)
+    : event_callback_(event_callback),
+      response_callback_(response_callback) {
+}
+
+DevToolsProtocolClient::~DevToolsProtocolClient() {
+}
+
+void DevToolsProtocolClient::SendNotification(const std::string& method,
+                                              base::DictionaryValue* params) {
+  event_callback_.Run(method, params);
+}
+
+void DevToolsProtocolClient::SendAsyncResponse(
+    scoped_refptr<DevToolsProtocol::Response> response) {
+  response_callback_.Run(response);
+}
+
+void DevToolsProtocolClient::SendInvalidParamsResponse(
+    scoped_refptr<DevToolsProtocol::Command> command,
+    const std::string& message) {
+  SendAsyncResponse(command->InvalidParamResponse(message));
+}
+
+void DevToolsProtocolClient::SendInternalErrorResponse(
+    scoped_refptr<DevToolsProtocol::Command> command,
+    const std::string& message) {
+  SendAsyncResponse(command->InternalErrorResponse(message));
+}
+
+void DevToolsProtocolClient::SendServerErrorResponse(
+    scoped_refptr<DevToolsProtocol::Command> command,
+    const std::string& message) {
+  SendAsyncResponse(command->ServerErrorResponse(message));
+}
+
+typedef DevToolsProtocolClient::Response Response;
+
+Response Response::FallThrough() {
+  Response response;
+  response.status_ = ResponseStatus::RESPONSE_STATUS_FALLTHROUGH;
+  return response;
+}
+
+Response Response::OK() {
+  Response response;
+  response.status_ = ResponseStatus::RESPONSE_STATUS_OK;
+  return response;
+}
+
+Response Response::InvalidParams(const std::string& message) {
+  Response response;
+  response.status_ = ResponseStatus::RESPONSE_STATUS_INVALID_PARAMS;
+  response.message_ = message;
+  return response;
+}
+
+Response Response::InternalError(const std::string& message) {
+  Response response;
+  response.status_ = ResponseStatus::RESPONSE_STATUS_INTERNAL_ERROR;
+  response.message_ = message;
+  return response;
+}
+
+Response Response::ServerError(const std::string& message) {
+  Response response;
+  response.status_ = ResponseStatus::RESPONSE_STATUS_SERVER_ERROR;
+  response.message_ = message;
+  return response;
+}
+
+DevToolsProtocolClient::ResponseStatus Response::status() const {
+  return status_;
+}
+
+const std::string& Response::message() const {
+  return message_;
+}
+
+Response::Response() {
+}
+
+}  // namespace content

content/browser/devtools/protocol/devtools_protocol_client.h

@@ -0,0 +1,76 @@
+// Copyright 2014 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.
+
+#ifndef CONTENT_BROWSER_DEVTOOLS_PROTOCOL_DEVTOOLS_PROTOCOL_CLIENT_H_
+#define CONTENT_BROWSER_DEVTOOLS_PROTOCOL_DEVTOOLS_PROTOCOL_CLIENT_H_
+
+#include "content/browser/devtools/devtools_protocol.h"
+
+namespace content {
+
+class DevToolsProtocolClient {
+ public:
+  typedef base::Callback<void(const std::string& event,
+                              base::DictionaryValue* params)> EventCallback;
+
+  typedef base::Callback<void(scoped_refptr<DevToolsProtocol::Response>)>
+      ResponseCallback;
+
+  enum ResponseStatus {
+    RESPONSE_STATUS_FALLTHROUGH,
+    RESPONSE_STATUS_OK,
+    RESPONSE_STATUS_INVALID_PARAMS,
+    RESPONSE_STATUS_INTERNAL_ERROR,
+    RESPONSE_STATUS_SERVER_ERROR,
+  };
+
+  struct Response {
+   public:
+    static Response FallThrough();
+    static Response OK();
+    static Response InvalidParams(const std::string& message);
+    static Response InternalError(const std::string& message);
+    static Response ServerError(const std::string& message);
+
+    ResponseStatus status() const;
+    const std::string& message() const;
+
+   private:
+    Response();
+
+    ResponseStatus status_;
+    std::string message_;
+  };
+
+  void SendInvalidParamsResponse(
+      scoped_refptr<DevToolsProtocol::Command> command,
+      const std::string& message);
+  void SendInternalErrorResponse(
+      scoped_refptr<DevToolsProtocol::Command> command,
+      const std::string& message);
+  void SendServerErrorResponse(
+      scoped_refptr<DevToolsProtocol::Command> command,
+      const std::string& message);
+
+ protected:
+  DevToolsProtocolClient(const EventCallback& event_callback,
+                         const ResponseCallback& response_callback);
+
+  virtual ~DevToolsProtocolClient();
+
+  void SendNotification(const std::string& method,
+                        base::DictionaryValue* params);
+
+  void SendAsyncResponse(scoped_refptr<DevToolsProtocol::Response> response);
+
+ private:
+  EventCallback event_callback_;
+  ResponseCallback response_callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(DevToolsProtocolClient);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_DEVTOOLS_PROTOCOL_DEVTOOLS_PROTOCOL_CLIENT_H_