sky/engine/bindings-dart/core/dart/DartInjectedScriptHostHelper.cpp

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#include "config.h"
#include "bindings/core/dart/DartInjectedScriptHostHelper.h"

#include "bindings/core/dart/DartController.h"
#include "bindings/core/dart/DartHandleProxy.h"
#include "bindings/core/dart/DartScriptState.h"
#include "bindings/core/dart/V8Converter.h"
#include "bindings/core/v8/V8HiddenValue.h"

namespace blink {

/**
 * Returns true if the expression passed in my args was evaluated as Dart code.
 */
v8::Handle<v8::Value> DartInjectedScriptHostHelper::evaluateIfDartContext(v8::Handle<v8::Object> v8InjectedScriptHost, v8::Handle<v8::String> expression)
{
    v8::Isolate* v8Isolate = v8::Isolate::GetCurrent();
    ASSERT(!v8Isolate->GetCurrentContext().IsEmpty());

    ScriptState* currentScriptState = 0;
    v8::Local<v8::Value> scriptStateWrapper = V8HiddenValue::getHiddenValue(v8::Isolate::GetCurrent(), v8InjectedScriptHost, V8HiddenValue::scriptState(v8Isolate));
    if (!scriptStateWrapper.IsEmpty() && scriptStateWrapper->IsExternal())
        currentScriptState = static_cast<ScriptState*>(v8::External::Cast(*scriptStateWrapper)->Value());
    else
        currentScriptState = V8ScriptState::current(v8Isolate);

    ExecutionContext* ALLOW_UNUSED scriptExecutionContext = currentScriptState->executionContext();
    ASSERT(scriptExecutionContext);

    if (!currentScriptState->isJavaScript()) {
        DartScriptState* dartScriptState = static_cast<DartScriptState*>(currentScriptState);
        DartIsolateScope scope(dartScriptState->isolate());
        DartApiScope apiScope;

        Dart_Handle target = Dart_GetLibraryFromId(dartScriptState->libraryId());
        return DartHandleProxy::evaluate(target, V8Converter::stringToDart(expression), Dart_Null());
    }
    return v8::Handle<v8::Value>();
}

} // namespace blink