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
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsPageContentFrame_h___
#define nsPageContentFrame_h___
#include "mozilla/Attributes.h"
#include "mozilla/ViewportFrame.h"
class nsPageFrame;
class nsSharedPageData;
namespace mozilla {
class PresShell;
} // namespace mozilla
// Page content frame class. Represents a page's content, in paginated mode.
class nsPageContentFrame final : public mozilla::ViewportFrame {
public:
NS_DECL_FRAMEARENA_HELPERS(nsPageContentFrame)
friend nsPageContentFrame* NS_NewPageContentFrame(
mozilla::PresShell* aPresShell, ComputedStyle* aStyle,
already_AddRefed<const nsAtom> aPageName);
friend class nsPageFrame;
// nsIFrame
void Reflow(nsPresContext* aPresContext, ReflowOutput& aReflowOutput,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) override;
bool IsFrameOfType(uint32_t aFlags) const override {
return ViewportFrame::IsFrameOfType(
aFlags & ~(nsIFrame::eCanContainOverflowContainers));
}
const nsAtom* GetPageName() const { return mPageName; }
void SetSharedPageData(nsSharedPageData* aPD) { mPD = aPD; }
ComputeTransformFunction GetTransformGetter() const override;
void BuildDisplayList(nsDisplayListBuilder*,
const nsDisplayListSet&) override;
/**
* Return our canvas frame.
*/
void AppendDirectlyOwnedAnonBoxes(nsTArray<OwnedAnonBox>& aResult) override;
void EnsurePageName();
// The default implementation of FirstContinuation in nsSplittableFrame is
// implemented in linear time, walking back through the linked list of
// continuations via mPrevContinuation.
// For nsPageContentFrames, we can find the first continuation through the
// frame tree structure in constant time.
nsIFrame* FirstContinuation() const final;
#ifdef DEBUG_FRAME_DUMP
// Debugging
nsresult GetFrameName(nsAString& aResult) const override;
void ExtraContainerFrameInfo(nsACString& aTo) const override;
#endif
protected:
explicit nsPageContentFrame(ComputedStyle* aStyle,
nsPresContext* aPresContext,
already_AddRefed<const nsAtom> aPageName)
: ViewportFrame(aStyle, aPresContext, kClassID), mPageName(aPageName) {}
RefPtr<const nsAtom> mPageName;
// Note: this will be set before reflow, and it's strongly owned by our
// nsPageSequenceFrame, which outlives us.
nsSharedPageData* mPD = nullptr;
// The combined InkOverflow from the previous and current page that does not
// yet have space allocated for it.
nscoord mRemainingOverflow = 0;
};
#endif /* nsPageContentFrame_h___ */
|
