/*
 * This source file is part of libRocket, the HTML/CSS Interface Middleware
 *
 * For the latest information, see http://www.librocket.com
 *
 * Copyright (c) 2008-2010 CodePoint Ltd, Shift Technology Ltd
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 */

#include "InputTypeRadio.h"
#include <Rocket/Controls/ElementFormControlInput.h>
#include <Rocket/Core/ElementUtilities.h>
#include <Rocket/Controls/ElementForm.h>

namespace Rocket {
namespace Controls {

InputTypeRadio::InputTypeRadio(ElementFormControlInput* element) : InputType(element)
{
	if (element->HasAttribute("checked"))
		PopRadioSet();
}

InputTypeRadio::~InputTypeRadio()
{
}

// Returns if this value should be submitted with the form.
bool InputTypeRadio::IsSubmitted()
{
	return element->HasAttribute("checked");
}

// Checks for necessary functional changes in the control as a result of changed attributes.
bool InputTypeRadio::OnAttributeChange(const Core::AttributeNameList& changed_attributes)
{
	// Check if maxlength has been defined.
	if (changed_attributes.find("checked") != changed_attributes.end())
	{
		bool checked = element->HasAttribute("checked");
		element->SetPseudoClass("checked", checked);

		if (checked)
			PopRadioSet();

		Rocket::Core::Dictionary parameters;
		parameters.Set("value", Rocket::Core::String(checked ? GetValue() : ""));
		element->DispatchEvent("change", parameters);
	}

	return true;
}

// Pops the element's radio set if we are checked.
void InputTypeRadio::OnChildAdd()
{
	if (element->HasAttribute("checked"))
		PopRadioSet();
}

// Checks for necessary functional changes in the control as a result of the event.
void InputTypeRadio::ProcessEvent(Core::Event& event)
{
	if (event == "click" &&
		!element->IsDisabled())
		element->SetAttribute("checked", "");
}

// Sizes the dimensions to the element's inherent size.
bool InputTypeRadio::GetIntrinsicDimensions(Rocket::Core::Vector2f& dimensions)
{
	dimensions.x = 16;
	dimensions.y = 16;

	return true;
}

// Pops all other radio buttons in our form that share our name.
void InputTypeRadio::PopRadioSet()
{
	// Uncheck all other radio buttons with our name in the form.
	ElementForm* form = NULL;
	Core::Element* parent = element->GetParentNode();
	while (parent != NULL &&
		   (form = dynamic_cast< ElementForm* >(parent)) == NULL)
	   parent = parent->GetParentNode();

	if (form != NULL)
	{
		Core::ElementList form_controls;
		Core::ElementUtilities::GetElementsByTagName(form_controls, form, "input");

		for (size_t i = 0; i < form_controls.size(); ++i)
		{
			ElementFormControlInput* radio_control = dynamic_cast< ElementFormControlInput* >(form_controls[i]);
			if (radio_control != NULL &&
				element != radio_control &&
				radio_control->GetAttribute< Rocket::Core::String >("type", "text") == "radio" &&
				radio_control->GetName() == element->GetName())
			{
				radio_control->RemoveAttribute("checked");
			}
		}
	}
}

}
}
