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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 2000 Simon Hausmann <hausmann@kde.org>
* Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef LayoutFrameSet_h
#define LayoutFrameSet_h
#include "core/layout/LayoutBox.h"
namespace blink {
class HTMLDimension;
class HTMLFrameSetElement;
class MouseEvent;
enum FrameEdge { LeftFrameEdge, RightFrameEdge, TopFrameEdge, BottomFrameEdge };
struct FrameEdgeInfo {
STACK_ALLOCATED();
FrameEdgeInfo(bool preventResize = false, bool allowBorder = true)
: m_preventResize(4)
, m_allowBorder(4)
{
m_preventResize.fill(preventResize);
m_allowBorder.fill(allowBorder);
}
bool preventResize(FrameEdge edge) const { return m_preventResize[edge]; }
bool allowBorder(FrameEdge edge) const { return m_allowBorder[edge]; }
void setPreventResize(FrameEdge edge, bool preventResize) { m_preventResize[edge] = preventResize; }
void setAllowBorder(FrameEdge edge, bool allowBorder) { m_allowBorder[edge] = allowBorder; }
private:
Vector<bool> m_preventResize;
Vector<bool> m_allowBorder;
};
class LayoutFrameSet final : public LayoutBox {
public:
LayoutFrameSet(HTMLFrameSetElement*);
~LayoutFrameSet() override;
LayoutObject* firstChild() const { ASSERT(children() == virtualChildren()); return children()->firstChild(); }
LayoutObject* lastChild() const { ASSERT(children() == virtualChildren()); return children()->lastChild(); }
// If you have a LayoutFrameSet, use firstChild or lastChild instead.
void slowFirstChild() const = delete;
void slowLastChild() const = delete;
const LayoutObjectChildList* children() const { return &m_children; }
LayoutObjectChildList* children() { return &m_children; }
FrameEdgeInfo edgeInfo() const;
bool userResize(MouseEvent*);
bool canResizeRow(const IntPoint&) const;
bool canResizeColumn(const IntPoint&) const;
void notifyFrameEdgeInfoChanged();
HTMLFrameSetElement* frameSet() const;
class GridAxis {
DISALLOW_NEW();
WTF_MAKE_NONCOPYABLE(GridAxis);
public:
GridAxis();
void resize(int);
Vector<int> m_sizes;
Vector<int> m_deltas;
Vector<bool> m_preventResize;
Vector<bool> m_allowBorder;
int m_splitBeingResized;
int m_splitResizeOffset;
};
const GridAxis& rows() const { return m_rows; }
const GridAxis& columns() const { return m_cols; }
const char* name() const override { return "LayoutFrameSet"; }
private:
static const int noSplit = -1;
LayoutObjectChildList* virtualChildren() override { return children(); }
const LayoutObjectChildList* virtualChildren() const override { return children(); }
bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectFrameSet || LayoutBox::isOfType(type); }
void layout() override;
void paint(const PaintInfo&, const LayoutPoint&) const override;
void computePreferredLogicalWidths() override;
bool isChildAllowed(LayoutObject*, const ComputedStyle&) const override;
CursorDirective getCursor(const LayoutPoint&, Cursor&) const override;
void setIsResizing(bool);
void layOutAxis(GridAxis&, const Vector<HTMLDimension>&, int availableSpace);
void computeEdgeInfo();
void fillFromEdgeInfo(const FrameEdgeInfo&, int r, int c);
void positionFrames();
int splitPosition(const GridAxis&, int split) const;
int hitTestSplit(const GridAxis&, int position) const;
void startResizing(GridAxis&, int position);
void continueResizing(GridAxis&, int position);
LayoutObjectChildList m_children;
GridAxis m_rows;
GridAxis m_cols;
bool m_isResizing;
bool m_isChildResizing;
};
DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutFrameSet, isFrameSet());
} // namespace blink
#endif // LayoutFrameSet_h
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