content/browser/webui/web_ui_message_handler.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/public/browser/web_ui_message_handler.h"
   6
   7 #include "base/logging.h"
   8 #include "base/strings/string_number_conversions.h"
   9 #include "base/strings/utf_string_conversions.h"
  10 #include "base/values.h"
  11
  12 namespace content {
  13
  14 bool WebUIMessageHandler::ExtractIntegerValue(const base::ListValue* value,
  15                                               int* out_int) {
  16   std::string string_value;
  17   if (value->GetString(0, &string_value))
  18     return base::StringToInt(string_value, out_int);
  19   double double_value;
  20   if (value->GetDouble(0, &double_value)) {
  21     *out_int = static_cast<int>(double_value);
  22     return true;
  23   }
  24   NOTREACHED();
  25   return false;
  26 }
  27
  28 bool WebUIMessageHandler::ExtractDoubleValue(const base::ListValue* value,
  29                                              double* out_value) {
  30   std::string string_value;
  31   if (value->GetString(0, &string_value))
  32     return base::StringToDouble(string_value, out_value);
  33   if (value->GetDouble(0, out_value))
  34     return true;
  35   NOTREACHED();
  36   return false;
  37 }
  38
  39 base::string16 WebUIMessageHandler::ExtractStringValue(
  40     const base::ListValue* value) {
  41   base::string16 string16_value;
  42   if (value->GetString(0, &string16_value))
  43     return string16_value;
  44   NOTREACHED();
  45   return base::string16();
  46 }
  47
  48 }  // namespace content