1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140
|
/*
* 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 RenderFrameSet_h
#define RenderFrameSet_h
#include "core/rendering/RenderBox.h"
namespace blink {
class HTMLDimension;
class HTMLFrameSetElement;
class MouseEvent;
enum FrameEdge { LeftFrameEdge, RightFrameEdge, TopFrameEdge, BottomFrameEdge };
struct FrameEdgeInfo {
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 RenderFrameSet final : public RenderBox {
public:
RenderFrameSet(HTMLFrameSetElement*);
virtual ~RenderFrameSet();
virtual void trace(Visitor*) override;
RenderObject* firstChild() const { ASSERT(children() == virtualChildren()); return children()->firstChild(); }
RenderObject* lastChild() const { ASSERT(children() == virtualChildren()); return children()->lastChild(); }
// If you have a RenderFrameSet, use firstChild or lastChild instead.
void slowFirstChild() const = delete;
void slowLastChild() const = delete;
const RenderObjectChildList* children() const { return &m_children; }
RenderObjectChildList* 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 {
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() { return m_rows; }
const GridAxis& columns() { return m_cols; }
private:
static const int noSplit = -1;
virtual RenderObjectChildList* virtualChildren() override { return children(); }
virtual const RenderObjectChildList* virtualChildren() const override { return children(); }
virtual const char* renderName() const override { return "RenderFrameSet"; }
virtual bool isOfType(RenderObjectType type) const override { return type == RenderObjectFrameSet || RenderBox::isOfType(type); }
virtual void layout() override;
virtual void paint(const PaintInfo&, const LayoutPoint&) override;
virtual void computePreferredLogicalWidths() override;
virtual bool isChildAllowed(RenderObject*, RenderStyle*) const override;
virtual CursorDirective getCursor(const LayoutPoint&, Cursor&) const override;
void setIsResizing(bool);
void layOutAxis(GridAxis&, const Vector<HTMLDimension>&, int availableSpace);
void computeEdgeInfo();
void fillFromEdgeInfo(const FrameEdgeInfo& edgeInfo, 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);
RenderObjectChildList m_children;
GridAxis m_rows;
GridAxis m_cols;
bool m_isResizing;
bool m_isChildResizing;
};
DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderFrameSet, isFrameSet());
} // namespace blink
#endif // RenderFrameSet_h
|