C++ KObjectRef::isNull方法代码示例

	void UIBinding::Log(Logger::Level level, std::string& message)
	{
		if (level > Logger::LWARN)
			return;

		std::string methodName("warn");
		if (level < Logger::LWARN)
			methodName = "error";

		std::string origMethodName(methodName);
		origMethodName.append("_orig");

		std::vector<AutoUserWindow>& openWindows = UIBinding::GetInstance()->GetOpenWindows();
		for (size_t i = 0; i < openWindows.size(); i++)
		{
			KObjectRef domWindow = openWindows[i]->GetDOMWindow();
			if (domWindow.isNull())
				continue;

			KObjectRef console = domWindow->GetObject("console", 0);
			if (console.isNull())
				continue;

			KMethodRef method = console->GetMethod(origMethodName.c_str(), 0);
			if (method.isNull())
				method = console->GetMethod(methodName.c_str(), 0);

			RunOnMainThread(method, ValueList(Value::NewString(message)), false);
		}
	}

	KValueRef Script::Evaluate(const char *mimeType, const char *name, const char *code, KObjectRef scope)
	{
		KObjectRef evaluator = this->FindEvaluatorWithMethod("canEvaluate", mimeType);
		if (!evaluator.isNull())
		{
			KMethodRef evaluate = evaluator->GetMethod("evaluate");
			if (!evaluate.isNull())
			{
				ValueList args;
				args.push_back(Value::NewString(mimeType));
				args.push_back(Value::NewString(name));
				args.push_back(Value::NewString(code));
				args.push_back(Value::NewObject(scope));
				return evaluate->Call(args);
			}
			else
			{
				throw ValueException::FromFormat(
					"Error evaluating: No \"evaluate\" method found on evaluator for mimeType: \"%s\"", mimeType);
			}
		}
		else
		{
			throw ValueException::FromFormat("Error evaluating: No evaluator found for mimeType: \"%s\"", mimeType);
		}
	}

	void UIBinding::_SetContextMenu(const ValueList& args, KValueRef result)
	{
		args.VerifyException("setContextMenu", "o|0");
		KObjectRef argObj = args.GetObject(0, NULL);
		AutoMenu menu = NULL;

		if (!argObj.isNull())
		{
			menu = argObj.cast<Menu>();
		}
		this->SetContextMenu(menu);
	}

    static VALUE m_missing(int argc, VALUE* argv, VALUE self)
    {
        bool assignment = false;

        if (global_object.isNull())
            return Qnil;

        // store the method name and arguments in separate variables
        VALUE method_name, args;
        rb_scan_args(argc, argv, "1*", &method_name, &args);
        char* name = strdup(rb_id2name(SYM2ID(method_name)));

        // Check if this is an assignment
        if (name[strlen(name) - 1] == '=')
        {
            name[strlen(name) - 1] = '\0';
            assignment = true;
        }
        // If we can't find this property perhaps we should return
        // the same property name except capitalized.
        KValueRef v = global_object->Get(name);
        if (v->IsUndefined())
        {
            name[0] = toupper(name[0]);
            v = global_object->Get(name);
        }
        // Okay, maybe not
        if (v->IsUndefined())
            name[0] = tolower(name[0]);

        VALUE rval;
        if (assignment) // Assignment
        {
            rval = rb_ary_entry(args, 0);
            KValueRef val = RubyUtils::ToKrollValue(rval);
            global_object->Set(name, val);
        }
        else if (v->IsMethod()) // Method call
        {
            rval = RubyUtils::GenericKMethodCall(v->ToMethod(), args);
        }
        else // Plain old access
        {
            rval = RubyUtils::ToRubyValue(v);
        }
        return rval;
    }

	void UIBinding::_SetMenu(const ValueList& args, KValueRef result)
	{
		args.VerifyException("setMenu", "o|0");
		KObjectRef argObj = args.GetObject(0, NULL);
		AutoMenu menu = NULL;

		if (!argObj.isNull())
		{
			menu = argObj.cast<Menu>();
		}

		this->SetMenu(menu); // platform-specific impl

		// Notify all windows that the app menu has changed.
		std::vector<AutoUserWindow>::iterator i = openWindows.begin();
		while (i != openWindows.end()) {
			(*i++)->AppMenuChanged();
		}
	}

    void RubyEvaluator::ContextToGlobal(VALUE ctx, KObjectRef o)
    {
        if (global_object.isNull())
            return;

        // Next copy all methods over -- they override variables
        VALUE methods = rb_funcall(ctx, rb_intern("singleton_methods"), 0);
        for (long i = 0; i < RARRAY_LEN(methods); i++)
        {
            VALUE meth_symbol = rb_ary_entry(methods, i);
            const char* meth_name = STR2CSTR(meth_symbol);

            // Skip our special method_missing method
            if (strcmp(meth_name, "method_missing") == 0)
                continue;

            volatile VALUE rmeth = rb_funcall(ctx, rb_intern("method"), 1, meth_symbol);
            KMethodRef method = new KRubyMethod(rmeth, meth_name);
            o->SetMethod(meth_name, method);
        }
    }

	AutoPtr<PreprocessData> Script::Preprocess(const char *url, KObjectRef scope)
	{
		KObjectRef evaluator = this->FindEvaluatorWithMethod("canPreprocess", url);
		if (!evaluator.isNull())
		{
			KMethodRef preprocess = evaluator->GetMethod("preprocess");
			if (!preprocess.isNull())
			{
				ValueList args;
				args.push_back(Value::NewString(url));
				args.push_back(Value::NewObject(scope));
				
				KValueRef result = preprocess->Call(args);
				
				if (result->IsObject())
				{
					KObjectRef object = result->ToObject();
					AutoPtr<PreprocessData> data = new PreprocessData();
					if (object->HasProperty("data"))
					{
						KValueRef objectData = object->Get("data");
						if (objectData->IsObject())
						{
							BlobRef blobData = objectData->ToObject().cast<Blob>();
							if (!blobData.isNull())
							{
								data->data = blobData;
							}
						}
						else if (objectData->IsString())
						{
							data->data = new Blob(objectData->ToString(), strlen(objectData->ToString()));
						}
					}
					else
					{
						throw ValueException::FromString("Preprocessor didn't return any data");
					}
					if (object->HasProperty("mimeType"))
					{
						data->mimeType = object->Get("mimeType")->ToString();
					}
					else
					{
						throw ValueException::FromString("Preprocessor didn't return a mimeType");
					}
					
					return data;
				}
			}
			else
			{
				throw ValueException::FromFormat(
					"Error preprocessing: No \"preprocess\" method found on evaluator for url: \"%s\"", url);
			}
		}
		else
		{
			throw ValueException::FromFormat("Error preprocessing: No evaluator found for url: \"%s\"", url);
		}
		return 0;
	}