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      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/ScriptState.h"
     35 #include "bindings/v8/V8Binding.h"
     36 #include "platform/JSONValues.h"
     37 
     38 namespace WebCore {
     39 
     40 ScriptValue::~ScriptValue()
     41 {
     42 }
     43 
     44 v8::Handle<v8::Value> ScriptValue::v8Value() const
     45 {
     46     if (isEmpty())
     47         return v8::Handle<v8::Value>();
     48 
     49     ASSERT(isolate()->InContext());
     50 
     51     // This is a check to validate that you don't return a ScriptValue to a world different
     52     // from the world that created the ScriptValue.
     53     // Probably this could be:
     54     //   if (&m_scriptState->world() == &DOMWrapperWorld::current(isolate()))
     55     //       return v8::Handle<v8::Value>();
     56     // instead of triggering RELEASE_ASSERT.
     57     RELEASE_ASSERT(&m_scriptState->world() == &DOMWrapperWorld::current(isolate()));
     58     return m_value->newLocal(isolate());
     59 }
     60 
     61 bool ScriptValue::toString(String& result) const
     62 {
     63     if (isEmpty())
     64         return false;
     65 
     66     ScriptState::Scope scope(m_scriptState.get());
     67     v8::Handle<v8::Value> string = v8Value();
     68     if (string.IsEmpty() || !string->IsString())
     69         return false;
     70     result = toCoreString(v8::Handle<v8::String>::Cast(string));
     71     return true;
     72 }
     73 
     74 PassRefPtr<JSONValue> ScriptValue::toJSONValue(ScriptState* scriptState) const
     75 {
     76     ASSERT(!scriptState->contextIsEmpty());
     77     ScriptState::Scope scope(scriptState);
     78     return v8ToJSONValue(scriptState->isolate(), v8Value(), JSONValue::maxDepth);
     79 }
     80 
     81 } // namespace WebCore
     82