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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 ROCKETCORELAYOUTBLOCKBOXSPACE_H
#define ROCKETCORELAYOUTBLOCKBOXSPACE_H
#include "../../Include/Rocket/Core/StyleSheetKeywords.h"
namespace Rocket {
namespace Core {
class Element;
class LayoutBlockBox;
/**
Each block box has a space object for managing the space occupied by its floating elements, and those of its
ancestors as relevant.
@author Peter Curry
*/
class LayoutBlockBoxSpace
{
public:
LayoutBlockBoxSpace(LayoutBlockBox* parent);
~LayoutBlockBoxSpace();
/// Imports boxes from another block into this space.
/// @param[in] space The space to import boxes from.
void ImportSpace(const LayoutBlockBoxSpace& space);
/// Generates the position for a box of a given size within our block box.
/// @param[out] box_position The generated position for the box.
/// @param[out] box_width The available width for the box.
/// @param[in] cursor The ideal vertical position for the box.
/// @param[in] dimensions The minimum available space required for the box.
void PositionBox(Vector2f& box_position, float& box_width, float cursor, const Vector2f& dimensions) const;
/// Generates and sets the position for a floating box of a given size within our block box. The element's box
/// is then added into our list of floating boxes.
/// @param[in] cursor The ideal vertical position for the box.
/// @param[in] element The element to position.
/// @return The offset of the bottom outer edge of the element.
float PositionBox(float cursor, Element* element);
/// Determines the appropriate vertical position for an object that is choosing to clear floating elements to
/// the left or right (or both).
/// @param[in] cursor The ideal vertical position.
/// @param[in] clear_property The value of the clear property of the clearing object.
/// @return The appropriate vertical position for the clearing object.
float ClearBoxes(float cursor, int clear_property);
/// Returns the top-left corner of the boxes within the space.
/// @return The space's offset.
const Vector2f& GetOffset() const;
/// Returns the dimensions of the boxes within the space.
/// @return The space's dimensions.
Vector2f GetDimensions() const;
void* operator new(size_t size);
void operator delete(void* chunk);
private:
enum AnchorEdge
{
LEFT = 0,
RIGHT = 1,
NUM_ANCHOR_EDGES = 2
};
/// Generates the position for an arbitrary box within our space layout, floated against either the left or
/// right edge.
/// @param box_position[out] The generated position for the box.
/// @param cursor[in] The ideal vertical position for the box.
/// @param dimensions[in] The size of the box to place.
/// @return The maximum width at the box position.
float PositionBox(Vector2f& box_position, float cursor, const Vector2f& dimensions, int float_property = FLOAT_NONE) const;
struct SpaceBox
{
SpaceBox();
SpaceBox(const Vector2f& offset, const Vector2f& dimensions);
Vector2f offset;
Vector2f dimensions;
};
typedef std::vector< SpaceBox > SpaceBoxList;
// Our block-box parent.
LayoutBlockBox* parent;
// The boxes floating in our space.
SpaceBoxList boxes[NUM_ANCHOR_EDGES];
// The offset and dimensions of the boxes added specifically into this space.
Vector2f offset;
Vector2f dimensions;
};
}
}
#endif
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