mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
109 lines
3.9 KiB
C++
109 lines
3.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* 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/. */
|
|
|
|
/*
|
|
* base class for rendering objects that can be split across lines,
|
|
* columns, or pages
|
|
*/
|
|
|
|
#ifndef nsSplittableFrame_h___
|
|
#define nsSplittableFrame_h___
|
|
|
|
#include "mozilla/Attributes.h"
|
|
#include "nsFrame.h"
|
|
|
|
// Derived class that allows splitting
|
|
class nsSplittableFrame : public nsFrame
|
|
{
|
|
public:
|
|
NS_DECL_FRAMEARENA_HELPERS
|
|
|
|
virtual void Init(nsIContent* aContent,
|
|
nsContainerFrame* aParent,
|
|
nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
|
|
|
|
virtual nsSplittableType GetSplittableType() const MOZ_OVERRIDE;
|
|
|
|
virtual void DestroyFrom(nsIFrame* aDestructRoot) MOZ_OVERRIDE;
|
|
|
|
/*
|
|
* Frame continuations can be either fluid or not:
|
|
* Fluid continuations ("in-flows") are the result of line breaking,
|
|
* column breaking, or page breaking.
|
|
* Other (non-fluid) continuations can be the result of BiDi frame splitting.
|
|
* A "flow" is a chain of fluid continuations.
|
|
*/
|
|
|
|
// Get the previous/next continuation, regardless of its type (fluid or non-fluid).
|
|
virtual nsIFrame* GetPrevContinuation() const MOZ_OVERRIDE;
|
|
virtual nsIFrame* GetNextContinuation() const MOZ_OVERRIDE;
|
|
|
|
// Set a previous/next non-fluid continuation.
|
|
virtual void SetPrevContinuation(nsIFrame*) MOZ_OVERRIDE;
|
|
virtual void SetNextContinuation(nsIFrame*) MOZ_OVERRIDE;
|
|
|
|
// Get the first/last continuation for this frame.
|
|
virtual nsIFrame* FirstContinuation() const MOZ_OVERRIDE;
|
|
virtual nsIFrame* LastContinuation() const MOZ_OVERRIDE;
|
|
|
|
#ifdef DEBUG
|
|
// Can aFrame2 be reached from aFrame1 by following prev/next continuations?
|
|
static bool IsInPrevContinuationChain(nsIFrame* aFrame1, nsIFrame* aFrame2);
|
|
static bool IsInNextContinuationChain(nsIFrame* aFrame1, nsIFrame* aFrame2);
|
|
#endif
|
|
|
|
// Get the previous/next continuation, only if it is fluid (an "in-flow").
|
|
nsIFrame* GetPrevInFlow() const;
|
|
nsIFrame* GetNextInFlow() const;
|
|
|
|
virtual nsIFrame* GetPrevInFlowVirtual() const MOZ_OVERRIDE { return GetPrevInFlow(); }
|
|
virtual nsIFrame* GetNextInFlowVirtual() const MOZ_OVERRIDE { return GetNextInFlow(); }
|
|
|
|
// Set a previous/next fluid continuation.
|
|
virtual void SetPrevInFlow(nsIFrame*) MOZ_OVERRIDE;
|
|
virtual void SetNextInFlow(nsIFrame*) MOZ_OVERRIDE;
|
|
|
|
// Get the first/last frame in the current flow.
|
|
virtual nsIFrame* FirstInFlow() const MOZ_OVERRIDE;
|
|
virtual nsIFrame* LastInFlow() const MOZ_OVERRIDE;
|
|
|
|
// Remove the frame from the flow. Connects the frame's prev-in-flow
|
|
// and its next-in-flow. This should only be called in frame Destroy() methods.
|
|
static void RemoveFromFlow(nsIFrame* aFrame);
|
|
|
|
protected:
|
|
explicit nsSplittableFrame(nsStyleContext* aContext) : nsFrame(aContext) {}
|
|
|
|
/**
|
|
* Determine the height consumed by our previous-in-flows.
|
|
*
|
|
* @note (bz) This makes laying out a splittable frame with N in-flows
|
|
* O(N^2)! So, use this function with caution and minimize the number
|
|
* of calls to this method.
|
|
*/
|
|
nscoord GetConsumedBSize() const;
|
|
|
|
/**
|
|
* Retrieve the effective computed block size of this frame, which is the
|
|
* computed block size, minus the block size consumed by any previous in-flows.
|
|
*/
|
|
nscoord GetEffectiveComputedBSize(const nsHTMLReflowState& aReflowState,
|
|
nscoord aConsumed = NS_INTRINSICSIZE) const;
|
|
|
|
/**
|
|
* @see nsIFrame::GetLogicalSkipSides()
|
|
*/
|
|
virtual LogicalSides GetLogicalSkipSides(const nsHTMLReflowState* aReflowState = nullptr) const MOZ_OVERRIDE;
|
|
|
|
#ifdef DEBUG
|
|
virtual void DumpBaseRegressionData(nsPresContext* aPresContext, FILE* out, int32_t aIndent) MOZ_OVERRIDE;
|
|
#endif
|
|
|
|
nsIFrame* mPrevContinuation;
|
|
nsIFrame* mNextContinuation;
|
|
};
|
|
|
|
#endif /* nsSplittableFrame_h___ */
|