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/*
* 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.
*
*/
#ifndef ROCKETCOREELEMENTDECORATION_H
#define ROCKETCOREELEMENTDECORATION_H
#include "../../Include/Rocket/Core/Types.h"
namespace Rocket {
namespace Core {
class Decorator;
class Element;
/**
Manages an elements decorator state
@author Lloyd Weehuizen
*/
class ElementDecoration
{
public:
/// Constructor
/// @param element The element this decorator with acting on
ElementDecoration(Element* element);
~ElementDecoration();
// Releases existing decorators and loads all decorators required by the element's definition.
bool ReloadDecorators();
/// Renders all appropriate decorators.
void RenderDecorators();
/// Mark decorators as dirty and force them to reset themselves
void DirtyDecorators();
/// Iterates over all active decorators attached to the decoration's element.
/// @param[inout] index Index to fetch. This is incremented after the fetch.
/// @param[out] pseudo_classes The pseudo-classes the decorator required to be active before it renders.
/// @param[out] name The name of the decorator at the specified index.
/// @param[out] decorator The decorator at the specified index.
/// @param[out] decorator_data This element's handle to any data is has stored against the decorator.
/// @return True if a decorator was successfully fetched, false if not.
bool IterateDecorators(int& index, PseudoClassList& pseudo_classes, String& name, Decorator*& decorator, DecoratorDataHandle& decorator_data) const;
private:
// Loads a single decorator and adds it to the list of loaded decorators for this element.
int LoadDecorator(Decorator* decorator);
// Releases all existing decorators and frees their data.
void ReleaseDecorators();
// Updates the list of active decorators (if necessary)
void UpdateActiveDecorators();
struct DecoratorHandle
{
Decorator* decorator;
DecoratorDataHandle decorator_data;
};
typedef std::vector< DecoratorHandle > DecoratorList;
typedef std::pair< PseudoClassList, int > PseudoClassDecoratorIndex;
typedef std::vector< PseudoClassDecoratorIndex > PseudoClassDecoratorIndexList;
typedef std::map< String, PseudoClassDecoratorIndexList > DecoratorIndex;
// The element this decorator belongs to
Element* element;
// The list of every decorator used by this element in every class.
DecoratorList decorators;
// The list of currently active decorators.
std::vector< int > active_decorators;
bool active_decorators_dirty;
// For each unique decorator name, this stores (in order of specificity) the name of the pseudo-class that has
// a definition for it, and the index into the list of decorators.
DecoratorIndex decorator_index;
};
}
}
#endif
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