src_wearable/CommonsJavaScript/JSUtils.cpp

   1 /*
   2  * Copyright (c) 2011 Samsung Electronics Co., Ltd All Rights Reserved
   3  *
   4  *    Licensed under the Apache License, Version 2.0 (the "License");
   5  *    you may not use this file except in compliance with the License.
   6  *    You may obtain a copy of the License at
   7  *
   8  *        http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  *    Unless required by applicable law or agreed to in writing, software
  11  *    distributed under the License is distributed on an "AS IS" BASIS,
  12  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  *    See the License for the specific language governing permissions and
  14  *    limitations under the License.
  15  */
  16 #include "Converter.h"
  17 #include "ScopedJSStringRef.h"
  18 #include "JSUtils.h"
  19
  20 namespace WrtDeviceApis {
  21 namespace CommonsJavaScript {
  22 using namespace WrtDeviceApis::Commons;
  23
  24 bool JSUtils::hasProperty(JSStaticValue* properties,
  25                           JSStringRef name)
  26 {
  27     JSStaticValue* property = properties;
  28     while (property->name) {
  29         if (JSStringIsEqualToUTF8CString(name, property->name)) {
  30             return true;
  31         }
  32         ++property;
  33     }
  34     return false;
  35 }
  36
  37 JSValueRef JSUtils::getJSProperty(JSContextRef context,
  38                                   JSValueRef jsValue,
  39                                   const std::string &name,
  40                                   JSValueRef *exception)
  41 {
  42     ScopedJSStringRef jsPropName(JSStringCreateWithUTF8CString(name.c_str()));
  43     Converter converter(context);
  44     JSObjectRef jsObject = converter.toJSObjectRef(jsValue);
  45     if (JSObjectHasProperty(context, jsObject, jsPropName.get())) {
  46         return JSObjectGetProperty(context, jsObject,
  47                                    jsPropName.get(), exception);
  48     }
  49     return NULL;
  50 }
  51
  52 JSValueRef JSUtils::getJSProperty(JSContextRef context,
  53                                   JSObjectRef object,
  54                                   const std::string& name)
  55 {
  56     Converter converter(context);
  57     Try {
  58         ScopedJSStringRef propName(converter.toJSStringRef(name));
  59         if (JSObjectHasProperty(context, object, propName.get())) {
  60             JSValueRef result = JSObjectGetProperty(context,
  61                                                     object,
  62                                                     propName.get(),
  63                                                     NULL);
  64             if (!JSValueIsUndefined(context, result)) {
  65                 return result;
  66             }
  67         }
  68     }
  69     Catch(ConversionException) {}
  70     return NULL;
  71 }
  72
  73 JSValueRef JSUtils::getJSPropertyOrUndefined(JSContextRef context,
  74                                              JSObjectRef object,
  75                                              const std::string& name)
  76 {
  77     Converter converter(context);
  78     Try {
  79         ScopedJSStringRef propName(converter.toJSStringRef(name));
  80         if (JSObjectHasProperty(context, object, propName.get())) {
  81             return JSObjectGetProperty(context, object, propName.get(), NULL);
  82         }
  83     }
  84     Catch(ConversionException) {}
  85     return JSValueMakeUndefined(context);
  86 }
  87 } // CommonsJavaScript
  88 } // WrtDeviceApis