content/renderer/dom_automation_controller.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/renderer/dom_automation_controller.h"
   6
   7 #include "base/json/json_string_value_serializer.h"
   8 #include "base/strings/string_util.h"
   9 #include "content/child/v8_value_converter_impl.h"
  10 #include "content/common/child_process_messages.h"
  11 #include "content/common/frame_messages.h"
  12 #include "content/renderer/render_view_impl.h"
  13 #include "gin/handle.h"
  14 #include "gin/object_template_builder.h"
  15 #include "third_party/WebKit/public/web/WebFrame.h"
  16 #include "third_party/WebKit/public/web/WebKit.h"
  17
  18 namespace content {
  19
  20 gin::WrapperInfo DomAutomationController::kWrapperInfo = {
  21     gin::kEmbedderNativeGin};
  22
  23 // static
  24 void DomAutomationController::Install(RenderFrame* render_frame,
  25                                       blink::WebFrame* frame) {
  26   v8::Isolate* isolate = blink::mainThreadIsolate();
  27   v8::HandleScope handle_scope(isolate);
  28   v8::Handle<v8::Context> context = frame->mainWorldScriptContext();
  29   if (context.IsEmpty())
  30     return;
  31
  32   v8::Context::Scope context_scope(context);
  33
  34   gin::Handle<DomAutomationController> controller =
  35       gin::CreateHandle(isolate, new DomAutomationController(render_frame));
  36   if (controller.IsEmpty())
  37     return;
  38
  39   v8::Handle<v8::Object> global = context->Global();
  40   global->Set(gin::StringToV8(isolate, "domAutomationController"),
  41               controller.ToV8());
  42 }
  43
  44 DomAutomationController::DomAutomationController(RenderFrame* render_frame)
  45     : RenderFrameObserver(render_frame), automation_id_(MSG_ROUTING_NONE) {}
  46
  47 DomAutomationController::~DomAutomationController() {}
  48
  49 gin::ObjectTemplateBuilder DomAutomationController::GetObjectTemplateBuilder(
  50     v8::Isolate* isolate) {
  51   return gin::Wrappable<DomAutomationController>::GetObjectTemplateBuilder(
  52              isolate)
  53       .SetMethod("send", &DomAutomationController::SendMsg)
  54       .SetMethod("setAutomationId", &DomAutomationController::SetAutomationId)
  55       .SetMethod("sendJSON", &DomAutomationController::SendJSON)
  56       .SetMethod("sendWithId", &DomAutomationController::SendWithId);
  57 }
  58
  59 void DomAutomationController::OnDestruct() {}
  60
  61 bool DomAutomationController::SendMsg(const gin::Arguments& args) {
  62   if (!render_frame())
  63     return false;
  64
  65   if (automation_id_ == MSG_ROUTING_NONE)
  66     return false;
  67
  68   std::string json;
  69   JSONStringValueSerializer serializer(&json);
  70   scoped_ptr<base::Value> value;
  71
  72   // Warning: note that JSON officially requires the root-level object to be
  73   // an object (e.g. {foo:3}) or an array, while here we're serializing
  74   // strings, bools, etc. to "JSON".  This only works because (a) the JSON
  75   // writer is lenient, and (b) on the receiving side we wrap the JSON string
  76   // in square brackets, converting it to an array, then parsing it and
  77   // grabbing the 0th element to get the value out.
  78   if (args.PeekNext()->IsString() || args.PeekNext()->IsBoolean() ||
  79       args.PeekNext()->IsNumber()) {
  80     V8ValueConverterImpl conv;
  81     value.reset(
  82         conv.FromV8Value(args.PeekNext(), args.isolate()->GetCurrentContext()));
  83   } else {
  84     return false;
  85   }
  86
  87   if (!serializer.Serialize(*value))
  88     return false;
  89
  90   bool succeeded = Send(new FrameHostMsg_DomOperationResponse(
  91       routing_id(), json, automation_id_));
  92
  93   automation_id_ = MSG_ROUTING_NONE;
  94   return succeeded;
  95 }
  96
  97 bool DomAutomationController::SendJSON(const std::string& json) {
  98   if (!render_frame())
  99     return false;
 100
 101   if (automation_id_ == MSG_ROUTING_NONE)
 102     return false;
 103   bool result = Send(new FrameHostMsg_DomOperationResponse(
 104       routing_id(), json, automation_id_));
 105
 106   automation_id_ = MSG_ROUTING_NONE;
 107   return result;
 108 }
 109
 110 bool DomAutomationController::SendWithId(int automation_id,
 111                                          const std::string& str) {
 112   if (!render_frame())
 113     return false;
 114   return Send(
 115       new FrameHostMsg_DomOperationResponse(routing_id(), str, automation_id));
 116 }
 117
 118 bool DomAutomationController::SetAutomationId(int automation_id) {
 119   automation_id_ = automation_id;
 120   return true;
 121 }
 122
 123 }  // namespace content