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      1 /*
      2  * Copyright (C) 2010 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     16  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     17  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     18  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     19  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     20  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     21  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "OptionsObject.h"
     28 
     29 #include "DOMStringList.h"
     30 #include "V8Binding.h"
     31 #include <limits>
     32 
     33 #if ENABLE(INDEXED_DATABASE)
     34 #include "IDBKeyRange.h"
     35 #include "V8IDBKeyRange.h"
     36 #endif
     37 
     38 namespace WebCore {
     39 
     40 OptionsObject::OptionsObject()
     41 {
     42 }
     43 
     44 OptionsObject::OptionsObject(const v8::Local<v8::Value>& options)
     45     : m_options(options)
     46 {
     47 }
     48 
     49 OptionsObject::~OptionsObject()
     50 {
     51 }
     52 
     53 OptionsObject& OptionsObject::operator=(const OptionsObject& optionsObject)
     54 {
     55     m_options = optionsObject.m_options;
     56     return *this;
     57 }
     58 
     59 bool OptionsObject::isUndefinedOrNull() const
     60 {
     61     if (m_options.IsEmpty())
     62         return true;
     63     return WebCore::isUndefinedOrNull(m_options);
     64 }
     65 
     66 bool OptionsObject::getKeyBool(const String& key, bool& value) const
     67 {
     68     v8::Local<v8::Value> v8Value;
     69     if (!getKey(key, v8Value))
     70         return false;
     71 
     72     v8::Local<v8::Boolean> v8Bool = v8Value->ToBoolean();
     73     if (v8Bool.IsEmpty())
     74         return false;
     75     value = v8Bool->Value();
     76     return true;
     77 }
     78 
     79 bool OptionsObject::getKeyInt32(const String& key, int32_t& value) const
     80 {
     81     v8::Local<v8::Value> v8Value;
     82     if (!getKey(key, v8Value))
     83         return false;
     84 
     85     v8::Local<v8::Int32> v8Int32 = v8Value->ToInt32();
     86     if (v8Int32.IsEmpty())
     87         return false;
     88     value = v8Int32->Value();
     89     return true;
     90 }
     91 
     92 bool OptionsObject::getKeyString(const String& key, String& value) const
     93 {
     94     v8::Local<v8::Value> v8Value;
     95     if (!getKey(key, v8Value))
     96         return false;
     97 
     98     // FIXME: It is possible for this to throw in which case we'd be getting back
     99     //        an empty string and returning true when we should be returning false.
    100     //        See fast/dom/Geolocation/script-tests/argument-types.js for a similar
    101     //        example.
    102     value = v8ValueToWebCoreString(v8Value);
    103     return true;
    104 }
    105 
    106 PassRefPtr<DOMStringList> OptionsObject::getKeyDOMStringList(const String& key) const
    107 {
    108     v8::Local<v8::Value> v8Value;
    109     if (!getKey(key, v8Value))
    110         return 0;
    111 
    112     if (!v8Value->IsArray())
    113         return 0;
    114 
    115     RefPtr<DOMStringList> ret = DOMStringList::create();
    116     v8::Local<v8::Array> v8Array = v8::Local<v8::Array>::Cast(v8Value);
    117     for (size_t i = 0; i < v8Array->Length(); ++i) {
    118         v8::Local<v8::Value> indexedValue = v8Array->Get(v8::Integer::New(i));
    119         ret->append(v8ValueToWebCoreString(indexedValue));
    120     }
    121     return ret.release();
    122 }
    123 
    124 #if ENABLE(INDEXED_DATABASE)
    125 
    126 PassRefPtr<IDBKeyRange> OptionsObject::getKeyKeyRange(const String& key) const
    127 {
    128     v8::Local<v8::Value> v8Value;
    129     if (!getKey(key, v8Value))
    130         return 0;
    131 
    132     if (!V8IDBKeyRange::HasInstance(v8Value))
    133         return 0;
    134 
    135     return V8IDBKeyRange::toNative(v8::Handle<v8::Object>::Cast(v8Value));
    136 }
    137 
    138 #endif
    139 
    140 bool OptionsObject::getKey(const String& key, v8::Local<v8::Value>& value) const
    141 {
    142     if (isUndefinedOrNull())
    143         return false;
    144     v8::Local<v8::Object> options = m_options->ToObject();
    145     ASSERT(!options.IsEmpty());
    146 
    147     v8::Handle<v8::String> v8Key = v8String(key);
    148     if (!options->Has(v8Key))
    149         return false;
    150     value = options->Get(v8Key);
    151     if (value.IsEmpty())
    152         return false;
    153     return !value->IsUndefined(); // FIXME: Is the undefined check necessary?
    154 }
    155 
    156 } // namespace WebCore
    157