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
|
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef RenderMultiColumnSpannerPlaceholder_h
#define RenderMultiColumnSpannerPlaceholder_h
#include "core/rendering/RenderMultiColumnFlowThread.h"
namespace blink {
// Placeholder renderer for column-span:all elements. The column-span:all renderer itself is a
// descendant of the flow thread, but due to its out-of-flow nature, we need something on the
// outside to take care of its positioning and sizing. RenderMultiColumnSpannerPlaceholder objects
// are siblings of RenderMultiColumnSet objects, i.e. direct children of the multicol container.
class RenderMultiColumnSpannerPlaceholder final : public RenderBox {
public:
virtual bool isOfType(RenderObjectType type) const override { return type == RenderObjectRenderMultiColumnSpannerPlaceholder || RenderBox::isOfType(type); }
static RenderMultiColumnSpannerPlaceholder* createAnonymous(RenderStyle* parentStyle, RenderBox*);
RenderFlowThread* flowThread() const { return toRenderBlockFlow(parent())->multiColumnFlowThread(); }
RenderBox* rendererInFlowThread() const { return m_rendererInFlowThread; }
void setRendererInFlowThread(RenderBox* renderer) { m_rendererInFlowThread = renderer; }
void spannerWillBeRemoved();
protected:
virtual void willBeRemovedFromTree() override;
virtual bool needsPreferredWidthsRecalculation() const override;
virtual void layout() override;
virtual void invalidateTreeIfNeeded(const PaintInvalidationState&) override;
virtual const char* renderName() const override;
private:
RenderMultiColumnSpannerPlaceholder(RenderBox*);
RenderBox* m_rendererInFlowThread; // The actual column-span:all renderer inside the flow thread.
};
DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderMultiColumnSpannerPlaceholder, isRenderMultiColumnSpannerPlaceholder());
} // namespace blink
#endif
|
