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convert MOZ_OVERRIDE override
convert MOZ_FINAL final
109 lines
3.8 KiB
C++
109 lines
3.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* base class for rendering objects that can be split across lines,
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* columns, or pages
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*/
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#ifndef nsSplittableFrame_h___
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#define nsSplittableFrame_h___
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#include "mozilla/Attributes.h"
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#include "nsFrame.h"
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// Derived class that allows splitting
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class nsSplittableFrame : public nsFrame
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{
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public:
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NS_DECL_FRAMEARENA_HELPERS
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virtual void Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) override;
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virtual nsSplittableType GetSplittableType() const override;
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virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
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/*
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* Frame continuations can be either fluid or not:
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* Fluid continuations ("in-flows") are the result of line breaking,
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* column breaking, or page breaking.
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* Other (non-fluid) continuations can be the result of BiDi frame splitting.
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* A "flow" is a chain of fluid continuations.
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*/
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// Get the previous/next continuation, regardless of its type (fluid or non-fluid).
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virtual nsIFrame* GetPrevContinuation() const override;
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virtual nsIFrame* GetNextContinuation() const override;
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// Set a previous/next non-fluid continuation.
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virtual void SetPrevContinuation(nsIFrame*) override;
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virtual void SetNextContinuation(nsIFrame*) override;
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// Get the first/last continuation for this frame.
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virtual nsIFrame* FirstContinuation() const override;
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virtual nsIFrame* LastContinuation() const override;
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#ifdef DEBUG
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// Can aFrame2 be reached from aFrame1 by following prev/next continuations?
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static bool IsInPrevContinuationChain(nsIFrame* aFrame1, nsIFrame* aFrame2);
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static bool IsInNextContinuationChain(nsIFrame* aFrame1, nsIFrame* aFrame2);
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#endif
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// Get the previous/next continuation, only if it is fluid (an "in-flow").
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nsIFrame* GetPrevInFlow() const;
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nsIFrame* GetNextInFlow() const;
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virtual nsIFrame* GetPrevInFlowVirtual() const override { return GetPrevInFlow(); }
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virtual nsIFrame* GetNextInFlowVirtual() const override { return GetNextInFlow(); }
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// Set a previous/next fluid continuation.
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virtual void SetPrevInFlow(nsIFrame*) override;
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virtual void SetNextInFlow(nsIFrame*) override;
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// Get the first/last frame in the current flow.
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virtual nsIFrame* FirstInFlow() const override;
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virtual nsIFrame* LastInFlow() const override;
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// Remove the frame from the flow. Connects the frame's prev-in-flow
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// and its next-in-flow. This should only be called in frame Destroy() methods.
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static void RemoveFromFlow(nsIFrame* aFrame);
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protected:
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explicit nsSplittableFrame(nsStyleContext* aContext) : nsFrame(aContext) {}
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/**
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* Determine the height consumed by our previous-in-flows.
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*
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* @note (bz) This makes laying out a splittable frame with N in-flows
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* O(N^2)! So, use this function with caution and minimize the number
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* of calls to this method.
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*/
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nscoord GetConsumedBSize() const;
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/**
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* Retrieve the effective computed block size of this frame, which is the
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* computed block size, minus the block size consumed by any previous in-flows.
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*/
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nscoord GetEffectiveComputedBSize(const nsHTMLReflowState& aReflowState,
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nscoord aConsumed = NS_INTRINSICSIZE) const;
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/**
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* @see nsIFrame::GetLogicalSkipSides()
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*/
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virtual LogicalSides GetLogicalSkipSides(const nsHTMLReflowState* aReflowState = nullptr) const override;
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#ifdef DEBUG
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virtual void DumpBaseRegressionData(nsPresContext* aPresContext, FILE* out, int32_t aIndent) override;
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#endif
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nsIFrame* mPrevContinuation;
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nsIFrame* mNextContinuation;
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};
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#endif /* nsSplittableFrame_h___ */
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