Source/bindings/core/dart/DartJsInteropData.cpp

/*
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#include "config.h"

#include "bindings/core/dart/DartJsInteropData.h"
#include "bindings/core/dart/V8Converter.h"

#include <dart_api.h>
#include <string.h>

namespace blink {

v8::Local<v8::Function> DartJsInteropData::cacheFunction(v8::Persistent<v8::Function>* cache, const char* scriptSrc)
{
    v8::Isolate* v8Isolate = v8::Isolate::GetCurrent();
    if (cache->IsEmpty()) {
        v8::Local<v8::Function> localFunction = v8::Local<v8::Function>::Cast(v8::Script::Compile(v8::String::NewFromUtf8(v8Isolate, scriptSrc))->Run());
        cache->Reset(v8Isolate, localFunction);
        return localFunction;
    }
    return v8::Local<v8::Function>::New(v8Isolate, *cache);
}

v8::Local<v8::Function> DartJsInteropData::captureThisFunction()
{
    const char* scriptSrc = "(function () {"
        "   var func = this;"
        "   return function () {"
        "       return func(this, Array.prototype.slice.apply(arguments));"
        "   };"
        "})";
    return cacheFunction(&m_captureThisFunction, scriptSrc);
}

v8::Local<v8::Function> DartJsInteropData::wrapDartFunction()
{
    const char* scriptSrc = "(function () {"
        "   var func = this;"
        "   return function () {"
        "       return func(Array.prototype.slice.apply(arguments));"
        "   };"
        "})";
    return cacheFunction(&m_wrapDartFunction, scriptSrc);
}

v8::Local<v8::Function> DartJsInteropData::instanceofFunction()
{
    return cacheFunction(&m_instanceofFunction, "(function (type) { return this instanceof type; })");
}

v8::Local<v8::String> DartJsInteropData::existingDartWrapperHiddenField(v8::Isolate* v8Isolate) {
    if (m_existingDartWrapperHiddenField.IsEmpty()) {
        // We are abusing Dart_DebugName() as it is supposed to give a unique
        // per isolate name.
        m_existingDartWrapperHiddenField.Reset(v8Isolate, v8::String::Concat(v8::String::NewFromUtf8(v8Isolate, "$existing_dart_wrapper_"), V8Converter::stringToV8(Dart_DebugName())));
    }
    return v8::Local<v8::String>::New(v8Isolate, m_existingDartWrapperHiddenField);
}

}