Home | History | Annotate | Download | only in v8 
      1 /*
      2  * Copyright (C) 2008, 2009, 2011 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 are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include "config.h"
     32 #include "bindings/v8/ScriptValue.h"
     33 
     34 #include "bindings/v8/ScriptScope.h"
     35 #include "bindings/v8/ScriptState.h"
     36 #include "bindings/v8/V8Binding.h"
     37 #include "platform/JSONValues.h"
     38 
     39 namespace WebCore {
     40 
     41 ScriptValue::~ScriptValue()
     42 {
     43 }
     44 
     45 bool ScriptValue::getString(String& result) const
     46 {
     47     if (hasNoValue())
     48         return false;
     49 
     50     v8::HandleScope handleScope(m_isolate);
     51     v8::Handle<v8::Value> string = v8Value();
     52     if (string.IsEmpty() || !string->IsString())
     53         return false;
     54     result = toCoreString(string.As<v8::String>());
     55     return true;
     56 }
     57 
     58 String ScriptValue::toString() const
     59 {
     60     v8::TryCatch block;
     61     v8::Handle<v8::String> string = v8Value()->ToString();
     62     if (block.HasCaught())
     63         return String();
     64     return v8StringToWebCoreString<String>(string, DoNotExternalize);
     65 }
     66 
     67 static PassRefPtr<JSONValue> v8ToJSONValue(v8::Handle<v8::Value> value, int maxDepth, v8::Isolate* isolate)
     68 {
     69     if (value.IsEmpty()) {
     70         ASSERT_NOT_REACHED();
     71         return 0;
     72     }
     73 
     74     if (!maxDepth)
     75         return 0;
     76     maxDepth--;
     77 
     78     if (value->IsNull() || value->IsUndefined())
     79         return JSONValue::null();
     80     if (value->IsBoolean())
     81         return JSONBasicValue::create(value->BooleanValue());
     82     if (value->IsNumber())
     83         return JSONBasicValue::create(value->NumberValue());
     84     if (value->IsString())
     85         return JSONString::create(toCoreString(value.As<v8::String>()));
     86     if (value->IsArray()) {
     87         v8::Handle<v8::Array> array = v8::Handle<v8::Array>::Cast(value);
     88         RefPtr<JSONArray> inspectorArray = JSONArray::create();
     89         uint32_t length = array->Length();
     90         for (uint32_t i = 0; i < length; i++) {
     91             v8::Local<v8::Value> value = array->Get(v8::Int32::New(i, isolate));
     92             RefPtr<JSONValue> element = v8ToJSONValue(value, maxDepth, isolate);
     93             if (!element)
     94                 return 0;
     95             inspectorArray->pushValue(element);
     96         }
     97         return inspectorArray;
     98     }
     99     if (value->IsObject()) {
    100         RefPtr<JSONObject> jsonObject = JSONObject::create();
    101         v8::Handle<v8::Object> object = v8::Handle<v8::Object>::Cast(value);
    102         v8::Local<v8::Array> propertyNames = object->GetPropertyNames();
    103         uint32_t length = propertyNames->Length();
    104         for (uint32_t i = 0; i < length; i++) {
    105             v8::Local<v8::Value> name = propertyNames->Get(v8::Int32::New(i, isolate));
    106             // FIXME(yurys): v8::Object should support GetOwnPropertyNames
    107             if (name->IsString() && !object->HasRealNamedProperty(v8::Handle<v8::String>::Cast(name)))
    108                 continue;
    109             RefPtr<JSONValue> propertyValue = v8ToJSONValue(object->Get(name), maxDepth, isolate);
    110             if (!propertyValue)
    111                 return 0;
    112             V8TRYCATCH_FOR_V8STRINGRESOURCE_RETURN(V8StringResource<WithNullCheck>, nameString, name, 0);
    113             jsonObject->setValue(nameString, propertyValue);
    114         }
    115         return jsonObject;
    116     }
    117     ASSERT_NOT_REACHED();
    118     return 0;
    119 }
    120 
    121 PassRefPtr<JSONValue> ScriptValue::toJSONValue(ScriptState* scriptState) const
    122 {
    123     v8::HandleScope handleScope(scriptState->isolate());
    124     // v8::Object::GetPropertyNames() expects current context to be not null.
    125     v8::Context::Scope contextScope(scriptState->context());
    126     return v8ToJSONValue(v8Value(), JSONValue::maxDepth, scriptState->isolate());
    127 }
    128 
    129 } // namespace WebCore
    130