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/bind.h"
   8 #include "base/bind_helpers.h"
   9 #include "base/json/json_string_value_serializer.h"
  10 #include "base/metrics/histogram.h"
  11 #include "base/metrics/statistics_recorder.h"
  12 #include "base/strings/string_util.h"
  13 #include "content/common/child_process_messages.h"
  14 #include "content/common/view_messages.h"
  15
  16 using webkit_glue::CppArgumentList;
  17 using webkit_glue::CppVariant;
  18
  19 namespace content {
  20
  21 DomAutomationController::DomAutomationController()
  22     : sender_(NULL),
  23       routing_id_(MSG_ROUTING_NONE),
  24       automation_id_(MSG_ROUTING_NONE) {
  25   BindCallback("send", base::Bind(&DomAutomationController::Send,
  26                                   base::Unretained(this)));
  27   BindCallback("setAutomationId",
  28                base::Bind(&DomAutomationController::SetAutomationId,
  29                           base::Unretained(this)));
  30   BindCallback("sendJSON", base::Bind(&DomAutomationController::SendJSON,
  31                                       base::Unretained(this)));
  32   BindCallback("sendWithId", base::Bind(&DomAutomationController::SendWithId,
  33                                         base::Unretained(this)));
  34 }
  35
  36 void DomAutomationController::Send(const CppArgumentList& args,
  37                                    CppVariant* result) {
  38   if (args.size() != 1) {
  39     result->SetNull();
  40     return;
  41   }
  42
  43   if (automation_id_ == MSG_ROUTING_NONE) {
  44     result->SetNull();
  45     return;
  46   }
  47
  48   if (!sender_) {
  49     NOTREACHED();
  50     result->SetNull();
  51     return;
  52   }
  53
  54   std::string json;
  55   JSONStringValueSerializer serializer(&json);
  56   scoped_ptr<base::Value> value;
  57
  58   // Warning: note that JSON officially requires the root-level object to be
  59   // an object (e.g. {foo:3}) or an array, while here we're serializing
  60   // strings, bools, etc. to "JSON".  This only works because (a) the JSON
  61   // writer is lenient, and (b) on the receiving side we wrap the JSON string
  62   // in square brackets, converting it to an array, then parsing it and
  63   // grabbing the 0th element to get the value out.
  64   switch (args[0].type) {
  65     case NPVariantType_String: {
  66       value.reset(new base::StringValue(args[0].ToString()));
  67       break;
  68     }
  69     case NPVariantType_Bool: {
  70       value.reset(new base::FundamentalValue(args[0].ToBoolean()));
  71       break;
  72     }
  73     case NPVariantType_Int32: {
  74       value.reset(new base::FundamentalValue(args[0].ToInt32()));
  75       break;
  76     }
  77     case NPVariantType_Double: {
  78       // The value that is sent back is an integer while it is treated
  79       // as a double in this binding. The reason being that KJS treats
  80       // any number value as a double. Refer for more details,
  81       // chrome/third_party/webkit/src/JavaScriptCore/bindings/c/c_utility.cpp
  82       value.reset(new base::FundamentalValue(args[0].ToInt32()));
  83       break;
  84     }
  85     default: {
  86       result->SetNull();
  87       return;
  88     }
  89   }
  90
  91   if (!serializer.Serialize(*value)) {
  92     result->SetNull();
  93     return;
  94   }
  95
  96   bool succeeded = sender_->Send(
  97       new ViewHostMsg_DomOperationResponse(routing_id_, json, automation_id_));
  98   result->Set(succeeded);
  99
 100   automation_id_ = MSG_ROUTING_NONE;
 101 }
 102
 103 void DomAutomationController::SendJSON(const CppArgumentList& args,
 104                                        CppVariant* result) {
 105   if (args.size() != 1) {
 106     result->SetNull();
 107     return;
 108   }
 109
 110   if (automation_id_ == MSG_ROUTING_NONE) {
 111     result->SetNull();
 112     return;
 113   }
 114
 115   if (!sender_) {
 116     NOTREACHED();
 117     result->SetNull();
 118     return;
 119   }
 120
 121   if (args[0].type != NPVariantType_String) {
 122     result->SetNull();
 123     return;
 124   }
 125
 126   std::string json = args[0].ToString();
 127   result->Set(sender_->Send(
 128       new ViewHostMsg_DomOperationResponse(routing_id_, json, automation_id_)));
 129
 130   automation_id_ = MSG_ROUTING_NONE;
 131 }
 132
 133 void DomAutomationController::SendWithId(const CppArgumentList& args,
 134                                          CppVariant* result) {
 135   if (args.size() != 2) {
 136     result->SetNull();
 137     return;
 138   }
 139
 140   if (!sender_) {
 141     NOTREACHED();
 142     result->SetNull();
 143     return;
 144   }
 145
 146   if (!args[0].isNumber() || args[1].type != NPVariantType_String) {
 147     result->SetNull();
 148     return;
 149   }
 150
 151   result->Set(sender_->Send(
 152       new ViewHostMsg_DomOperationResponse(routing_id_, args[1].ToString(),
 153                                            args[0].ToInt32())));
 154 }
 155
 156 void DomAutomationController::SetAutomationId(
 157     const CppArgumentList& args, CppVariant* result) {
 158   if (args.size() != 1) {
 159     result->SetNull();
 160     return;
 161   }
 162
 163   // The check here is for NumberType and not Int32 as
 164   // KJS::JSType only defines a NumberType (no Int32)
 165   if (!args[0].isNumber()) {
 166     result->SetNull();
 167     return;
 168   }
 169
 170   automation_id_ = args[0].ToInt32();
 171   result->Set(true);
 172 }
 173
 174 }  // namespace content