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d77152fcd0
This patch is generated by the following script:
function rename() {
find layout\
-type f\
! -path "./obj*"\
! -path "./.git"\
! -path "./.hg"\
\( -name "*.cpp" -or\
-name "*.h" \)\
-exec sed -i -r "s/$1/$2/g" "{}" \;
}
rename aChildRS aChildRI
rename aContainingBlockRS aContainingBlockRI
rename aFrameRS aFrameRI
rename aLastRS aLastRI
rename aOuterRS aOuterRI
rename aRS aRI
rename blockHtmlRS blockHtmlRI
rename captionRS captionRI
rename cellRS cellRI
rename childRS childRI
rename firstAncestorRS firstAncestorRI
rename flexContainerRS flexContainerRI
rename gridRS gridRI
rename innerRS innerRI
rename lastButOneRS lastButOneRI
rename LineContainerRS LineContainerRI
rename mBlockRS mBlockRI
rename parentRS parentRI
rename secondAncestorRS secondAncestorRI
rename lastRSSize lastRISize
rename lastRSPadding lastRIPadding
MozReview-Commit-ID: YEgZs3WMow
--HG--
extra : rebase_source : c26050c71a3a5b13ef46e6d3582e581702d49ee8
978 lines
41 KiB
C++
978 lines
41 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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/* struct containing the input to nsIFrame::Reflow */
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#ifndef mozilla_ReflowInput_h
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#define mozilla_ReflowInput_h
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#include "nsMargin.h"
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#include "nsStyleCoord.h"
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#include "nsIFrame.h"
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#include "mozilla/Assertions.h"
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#include <algorithm>
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class nsPresContext;
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class nsRenderingContext;
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class nsFloatManager;
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class nsLineLayout;
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class nsIPercentBSizeObserver;
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struct nsHypotheticalPosition;
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/**
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* @return aValue clamped to [aMinValue, aMaxValue].
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*
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* @note This function needs to handle aMinValue > aMaxValue. In that case,
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* aMinValue is returned.
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* @see http://www.w3.org/TR/CSS21/visudet.html#min-max-widths
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* @see http://www.w3.org/TR/CSS21/visudet.html#min-max-heights
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*/
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template <class NumericType>
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NumericType
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NS_CSS_MINMAX(NumericType aValue, NumericType aMinValue, NumericType aMaxValue)
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{
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NumericType result = aValue;
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if (aMaxValue < result)
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result = aMaxValue;
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if (aMinValue > result)
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result = aMinValue;
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return result;
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}
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/**
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* CSS Frame type. Included as part of the reflow state.
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*/
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typedef uint32_t nsCSSFrameType;
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#define NS_CSS_FRAME_TYPE_UNKNOWN 0
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#define NS_CSS_FRAME_TYPE_INLINE 1
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#define NS_CSS_FRAME_TYPE_BLOCK 2 /* block-level in normal flow */
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#define NS_CSS_FRAME_TYPE_FLOATING 3
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#define NS_CSS_FRAME_TYPE_ABSOLUTE 4
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#define NS_CSS_FRAME_TYPE_INTERNAL_TABLE 5 /* row group frame, row frame, cell frame, ... */
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/**
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* Bit-flag that indicates whether the element is replaced. Applies to inline,
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* block-level, floating, and absolutely positioned elements
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*/
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#define NS_CSS_FRAME_TYPE_REPLACED 0x08000
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/**
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* Bit-flag that indicates that the element is replaced and contains a block
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* (eg some form controls). Applies to inline, block-level, floating, and
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* absolutely positioned elements. Mutually exclusive with
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* NS_CSS_FRAME_TYPE_REPLACED.
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*/
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#define NS_CSS_FRAME_TYPE_REPLACED_CONTAINS_BLOCK 0x10000
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/**
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* Helper macros for telling whether items are replaced
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*/
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#define NS_FRAME_IS_REPLACED_NOBLOCK(_ft) \
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(NS_CSS_FRAME_TYPE_REPLACED == ((_ft) & NS_CSS_FRAME_TYPE_REPLACED))
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#define NS_FRAME_IS_REPLACED(_ft) \
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(NS_FRAME_IS_REPLACED_NOBLOCK(_ft) || \
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NS_FRAME_IS_REPLACED_CONTAINS_BLOCK(_ft))
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#define NS_FRAME_REPLACED(_ft) \
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(NS_CSS_FRAME_TYPE_REPLACED | (_ft))
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#define NS_FRAME_IS_REPLACED_CONTAINS_BLOCK(_ft) \
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(NS_CSS_FRAME_TYPE_REPLACED_CONTAINS_BLOCK == \
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((_ft) & NS_CSS_FRAME_TYPE_REPLACED_CONTAINS_BLOCK))
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#define NS_FRAME_REPLACED_CONTAINS_BLOCK(_ft) \
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(NS_CSS_FRAME_TYPE_REPLACED_CONTAINS_BLOCK | (_ft))
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/**
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* A macro to extract the type. Masks off the 'replaced' bit-flag
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*/
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#define NS_FRAME_GET_TYPE(_ft) \
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((_ft) & ~(NS_CSS_FRAME_TYPE_REPLACED | \
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NS_CSS_FRAME_TYPE_REPLACED_CONTAINS_BLOCK))
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namespace mozilla {
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// A base class of ReflowInput that computes only the padding,
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// border, and margin, since those values are needed more often.
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struct SizeComputationInput {
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public:
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typedef mozilla::WritingMode WritingMode;
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typedef mozilla::LogicalMargin LogicalMargin;
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// The frame being reflowed.
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nsIFrame* mFrame;
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// Rendering context to use for measurement.
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nsRenderingContext* mRenderingContext;
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const nsMargin& ComputedPhysicalMargin() const { return mComputedMargin; }
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const nsMargin& ComputedPhysicalBorderPadding() const { return mComputedBorderPadding; }
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const nsMargin& ComputedPhysicalPadding() const { return mComputedPadding; }
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// We may need to eliminate the (few) users of these writable-reference accessors
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// as part of migrating to logical coordinates.
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nsMargin& ComputedPhysicalMargin() { return mComputedMargin; }
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nsMargin& ComputedPhysicalBorderPadding() { return mComputedBorderPadding; }
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nsMargin& ComputedPhysicalPadding() { return mComputedPadding; }
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const LogicalMargin ComputedLogicalMargin() const
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{ return LogicalMargin(mWritingMode, mComputedMargin); }
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const LogicalMargin ComputedLogicalBorderPadding() const
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{ return LogicalMargin(mWritingMode, mComputedBorderPadding); }
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const LogicalMargin ComputedLogicalPadding() const
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{ return LogicalMargin(mWritingMode, mComputedPadding); }
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void SetComputedLogicalMargin(mozilla::WritingMode aWM,
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const LogicalMargin& aMargin)
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{ mComputedMargin = aMargin.GetPhysicalMargin(aWM); }
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void SetComputedLogicalMargin(const LogicalMargin& aMargin)
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{ SetComputedLogicalMargin(mWritingMode, aMargin); }
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void SetComputedLogicalBorderPadding(mozilla::WritingMode aWM,
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const LogicalMargin& aMargin)
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{ mComputedBorderPadding = aMargin.GetPhysicalMargin(aWM); }
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void SetComputedLogicalBorderPadding(const LogicalMargin& aMargin)
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{ SetComputedLogicalBorderPadding(mWritingMode, aMargin); }
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void SetComputedLogicalPadding(mozilla::WritingMode aWM,
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const LogicalMargin& aMargin)
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{ mComputedPadding = aMargin.GetPhysicalMargin(aWM); }
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void SetComputedLogicalPadding(const LogicalMargin& aMargin)
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{ SetComputedLogicalPadding(mWritingMode, aMargin); }
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WritingMode GetWritingMode() const { return mWritingMode; }
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protected:
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// cached copy of the frame's writing-mode, for logical coordinates
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WritingMode mWritingMode;
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// These are PHYSICAL coordinates (for now).
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// Will probably become logical in due course.
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// Computed margin values
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nsMargin mComputedMargin;
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// Cached copy of the border + padding values
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nsMargin mComputedBorderPadding;
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// Computed padding values
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nsMargin mComputedPadding;
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public:
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// Callers using this constructor must call InitOffsets on their own.
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SizeComputationInput(nsIFrame *aFrame, nsRenderingContext *aRenderingContext)
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: mFrame(aFrame)
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, mRenderingContext(aRenderingContext)
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, mWritingMode(aFrame->GetWritingMode())
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{
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}
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SizeComputationInput(nsIFrame *aFrame, nsRenderingContext *aRenderingContext,
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mozilla::WritingMode aContainingBlockWritingMode,
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nscoord aContainingBlockISize);
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struct ReflowInputFlags {
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ReflowInputFlags() { memset(this, 0, sizeof(*this)); }
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uint16_t mSpecialBSizeReflow:1; // used by tables to communicate special reflow (in process) to handle
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// percent bsize frames inside cells which may not have computed bsizes
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uint16_t mNextInFlowUntouched:1; // nothing in the frame's next-in-flow (or its descendants)
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// is changing
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uint16_t mIsTopOfPage:1; // Is the current context at the top of a
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// page? When true, we force something
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// that's too tall for a page/column to
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// fit anyway to avoid infinite loops.
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uint16_t mAssumingHScrollbar:1; // parent frame is an nsIScrollableFrame and it
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// is assuming a horizontal scrollbar
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uint16_t mAssumingVScrollbar:1; // parent frame is an nsIScrollableFrame and it
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// is assuming a vertical scrollbar
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uint16_t mIsIResize:1; // Is frame (a) not dirty and (b) a
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// different inline-size than before?
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uint16_t mIsBResize:1; // Is frame (a) not dirty and (b) a
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// different block-size than before or
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// (potentially) in a context where
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// percent block-sizes have a different
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// basis?
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uint16_t mTableIsSplittable:1; // tables are splittable, this should happen only inside a page
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// and never insider a column frame
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uint16_t mHeightDependsOnAncestorCell:1; // Does frame height depend on
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// an ancestor table-cell?
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uint16_t mIsColumnBalancing:1; // nsColumnSetFrame is balancing columns
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uint16_t mIsFlexContainerMeasuringHeight:1; // nsFlexContainerFrame is
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// reflowing this child to
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// measure its intrinsic height.
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uint16_t mDummyParentReflowInput:1; // a "fake" reflow state made
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// in order to be the parent
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// of a real one
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uint16_t mMustReflowPlaceholders:1; // Should this frame reflow its place-
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// holder children? If the available
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// height of this frame didn't change,
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// but its in a paginated environment
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// (e.g. columns), it should always
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// reflow its placeholder children.
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uint16_t mShrinkWrap:1; // stores the COMPUTE_SIZE_SHRINK_WRAP ctor flag
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uint16_t mUseAutoBSize:1; // stores the COMPUTE_SIZE_USE_AUTO_BSIZE ctor flag
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uint16_t mStaticPosIsCBOrigin:1; // the STATIC_POS_IS_CB_ORIGIN ctor flag
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};
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#ifdef DEBUG
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// Reflow trace methods. Defined in nsFrame.cpp so they have access
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// to the display-reflow infrastructure.
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static void* DisplayInitOffsetsEnter(
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nsIFrame* aFrame,
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SizeComputationInput* aState,
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const mozilla::LogicalSize& aPercentBasis,
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const nsMargin* aBorder,
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const nsMargin* aPadding);
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static void DisplayInitOffsetsExit(nsIFrame* aFrame,
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SizeComputationInput* aState,
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void* aValue);
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#endif
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private:
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/**
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* Computes margin values from the specified margin style information, and
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* fills in the mComputedMargin member.
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*
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* @param aWM Writing mode of the containing block
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* @param aPercentBasis
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* Logical size in the writing mode of the containing block to use
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* for resolving percentage margin values in the inline and block
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* axes.
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* The inline size is usually the containing block inline-size
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* (width if writing mode is horizontal, and height if vertical).
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* The block size is usually the containing block inline-size, per
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* CSS21 sec 8.3 (read in conjunction with CSS Writing Modes sec
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* 7.2), but may be the containing block block-size, e.g. in CSS3
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* Flexbox and Grid.
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* @return true if the margin is dependent on the containing block size.
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*/
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bool ComputeMargin(mozilla::WritingMode aWM,
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const mozilla::LogicalSize& aPercentBasis);
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/**
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* Computes padding values from the specified padding style information, and
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* fills in the mComputedPadding member.
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*
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* @param aWM Writing mode of the containing block
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* @param aPercentBasis
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* Logical size in the writing mode of the containing block to use
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* for resolving percentage padding values in the inline and block
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* axes.
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* The inline size is usually the containing block inline-size
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* (width if writing mode is horizontal, and height if vertical).
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* The block size is usually the containing block inline-size, per
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* CSS21 sec 8.3 (read in conjunction with CSS Writing Modes sec
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* 7.2), but may be the containing block block-size, e.g. in CSS3
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* Flexbox and Grid.
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* @return true if the padding is dependent on the containing block size.
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*/
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bool ComputePadding(mozilla::WritingMode aWM,
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const mozilla::LogicalSize& aPercentBasis,
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nsIAtom* aFrameType);
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protected:
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void InitOffsets(mozilla::WritingMode aWM,
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const mozilla::LogicalSize& aPercentBasis,
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nsIAtom* aFrameType,
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ReflowInputFlags aFlags,
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const nsMargin* aBorder = nullptr,
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const nsMargin* aPadding = nullptr);
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/*
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* Convert nsStyleCoord to nscoord when percentages depend on the
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* inline size of the containing block, and enumerated values are for
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* inline size, min-inline-size, or max-inline-size. Does not handle
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* auto inline sizes.
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*/
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inline nscoord ComputeISizeValue(nscoord aContainingBlockISize,
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nscoord aContentEdgeToBoxSizing,
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nscoord aBoxSizingToMarginEdge,
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const nsStyleCoord& aCoord) const;
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// same as previous, but using mComputedBorderPadding, mComputedPadding,
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// and mComputedMargin
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nscoord ComputeISizeValue(nscoord aContainingBlockISize,
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mozilla::StyleBoxSizing aBoxSizing,
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const nsStyleCoord& aCoord) const;
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nscoord ComputeBSizeValue(nscoord aContainingBlockBSize,
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mozilla::StyleBoxSizing aBoxSizing,
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const nsStyleCoord& aCoord) const;
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};
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/**
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* State passed to a frame during reflow or intrinsic size calculation.
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*
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* XXX Refactor so only a base class (nsSizingState?) is used for intrinsic
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* size calculation.
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*
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* @see nsIFrame#Reflow()
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*/
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struct ReflowInput : public SizeComputationInput {
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// the reflow states are linked together. this is the pointer to the
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// parent's reflow state
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const ReflowInput* mParentReflowInput;
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// pointer to the float manager associated with this area
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nsFloatManager* mFloatManager;
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// LineLayout object (only for inline reflow; set to nullptr otherwise)
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nsLineLayout* mLineLayout;
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// The appropriate reflow state for the containing block (for
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// percentage widths, etc.) of this reflow state's frame.
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const ReflowInput *mCBReflowInput;
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// The type of frame, from css's perspective. This value is
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// initialized by the Init method below.
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nsCSSFrameType mFrameType;
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// The amount the in-flow position of the block is moving vertically relative
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// to its previous in-flow position (i.e. the amount the line containing the
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// block is moving).
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// This should be zero for anything which is not a block outside, and it
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// should be zero for anything which has a non-block parent.
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// The intended use of this value is to allow the accurate determination
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// of the potential impact of a float
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// This takes on an arbitrary value the first time a block is reflowed
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nscoord mBlockDelta;
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// If an ReflowInput finds itself initialized with an unconstrained
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// inline-size, it will look up its parentReflowInput chain for a state
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// with an orthogonal writing mode and a non-NS_UNCONSTRAINEDSIZE value for
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// orthogonal limit; when it finds such a reflow-state, it will use its
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// orthogonal-limit value to constrain inline-size.
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// This is initialized to NS_UNCONSTRAINEDSIZE (so it will be ignored),
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// but reset to a suitable value for the reflow root by nsPresShell.
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nscoord mOrthogonalLimit;
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// Accessors for the private fields below. Forcing all callers to use these
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// will allow us to introduce logical-coordinate versions and gradually
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// change clients from physical to logical as needed; and potentially switch
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// the internal fields from physical to logical coordinates in due course,
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// while maintaining compatibility with not-yet-updated code.
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nscoord AvailableWidth() const { return mAvailableWidth; }
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nscoord AvailableHeight() const { return mAvailableHeight; }
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nscoord ComputedWidth() const { return mComputedWidth; }
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nscoord ComputedHeight() const { return mComputedHeight; }
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nscoord ComputedMinWidth() const { return mComputedMinWidth; }
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nscoord ComputedMaxWidth() const { return mComputedMaxWidth; }
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nscoord ComputedMinHeight() const { return mComputedMinHeight; }
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nscoord ComputedMaxHeight() const { return mComputedMaxHeight; }
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nscoord& AvailableWidth() { return mAvailableWidth; }
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nscoord& AvailableHeight() { return mAvailableHeight; }
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nscoord& ComputedWidth() { return mComputedWidth; }
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nscoord& ComputedHeight() { return mComputedHeight; }
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nscoord& ComputedMinWidth() { return mComputedMinWidth; }
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nscoord& ComputedMaxWidth() { return mComputedMaxWidth; }
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nscoord& ComputedMinHeight() { return mComputedMinHeight; }
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nscoord& ComputedMaxHeight() { return mComputedMaxHeight; }
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// ISize and BSize are logical-coordinate dimensions:
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// ISize is the size in the writing mode's inline direction (which equates to
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// width in horizontal writing modes, height in vertical ones), and BSize is
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// the size in the block-progression direction.
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nscoord AvailableISize() const
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{ return mWritingMode.IsVertical() ? mAvailableHeight : mAvailableWidth; }
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nscoord AvailableBSize() const
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{ return mWritingMode.IsVertical() ? mAvailableWidth : mAvailableHeight; }
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nscoord ComputedISize() const
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{ return mWritingMode.IsVertical() ? mComputedHeight : mComputedWidth; }
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nscoord ComputedBSize() const
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{ return mWritingMode.IsVertical() ? mComputedWidth : mComputedHeight; }
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nscoord ComputedMinISize() const
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{ return mWritingMode.IsVertical() ? mComputedMinHeight : mComputedMinWidth; }
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nscoord ComputedMaxISize() const
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{ return mWritingMode.IsVertical() ? mComputedMaxHeight : mComputedMaxWidth; }
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nscoord ComputedMinBSize() const
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{ return mWritingMode.IsVertical() ? mComputedMinWidth : mComputedMinHeight; }
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nscoord ComputedMaxBSize() const
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{ return mWritingMode.IsVertical() ? mComputedMaxWidth : mComputedMaxHeight; }
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nscoord& AvailableISize()
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{ return mWritingMode.IsVertical() ? mAvailableHeight : mAvailableWidth; }
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nscoord& AvailableBSize()
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{ return mWritingMode.IsVertical() ? mAvailableWidth : mAvailableHeight; }
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nscoord& ComputedISize()
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{ return mWritingMode.IsVertical() ? mComputedHeight : mComputedWidth; }
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nscoord& ComputedBSize()
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{ return mWritingMode.IsVertical() ? mComputedWidth : mComputedHeight; }
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nscoord& ComputedMinISize()
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{ return mWritingMode.IsVertical() ? mComputedMinHeight : mComputedMinWidth; }
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nscoord& ComputedMaxISize()
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{ return mWritingMode.IsVertical() ? mComputedMaxHeight : mComputedMaxWidth; }
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nscoord& ComputedMinBSize()
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{ return mWritingMode.IsVertical() ? mComputedMinWidth : mComputedMinHeight; }
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nscoord& ComputedMaxBSize()
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{ return mWritingMode.IsVertical() ? mComputedMaxWidth : mComputedMaxHeight; }
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|
|
mozilla::LogicalSize AvailableSize() const {
|
|
return mozilla::LogicalSize(mWritingMode,
|
|
AvailableISize(), AvailableBSize());
|
|
}
|
|
mozilla::LogicalSize ComputedSize() const {
|
|
return mozilla::LogicalSize(mWritingMode,
|
|
ComputedISize(), ComputedBSize());
|
|
}
|
|
mozilla::LogicalSize ComputedMinSize() const {
|
|
return mozilla::LogicalSize(mWritingMode,
|
|
ComputedMinISize(), ComputedMinBSize());
|
|
}
|
|
mozilla::LogicalSize ComputedMaxSize() const {
|
|
return mozilla::LogicalSize(mWritingMode,
|
|
ComputedMaxISize(), ComputedMaxBSize());
|
|
}
|
|
|
|
mozilla::LogicalSize AvailableSize(mozilla::WritingMode aWM) const
|
|
{ return AvailableSize().ConvertTo(aWM, mWritingMode); }
|
|
mozilla::LogicalSize ComputedSize(mozilla::WritingMode aWM) const
|
|
{ return ComputedSize().ConvertTo(aWM, mWritingMode); }
|
|
mozilla::LogicalSize ComputedMinSize(mozilla::WritingMode aWM) const
|
|
{ return ComputedMinSize().ConvertTo(aWM, mWritingMode); }
|
|
mozilla::LogicalSize ComputedMaxSize(mozilla::WritingMode aWM) const
|
|
{ return ComputedMaxSize().ConvertTo(aWM, mWritingMode); }
|
|
|
|
mozilla::LogicalSize ComputedSizeWithPadding() const {
|
|
mozilla::WritingMode wm = GetWritingMode();
|
|
return mozilla::LogicalSize(wm,
|
|
ComputedISize() +
|
|
ComputedLogicalPadding().IStartEnd(wm),
|
|
ComputedBSize() +
|
|
ComputedLogicalPadding().BStartEnd(wm));
|
|
}
|
|
|
|
mozilla::LogicalSize ComputedSizeWithPadding(mozilla::WritingMode aWM) const {
|
|
return ComputedSizeWithPadding().ConvertTo(aWM, GetWritingMode());
|
|
}
|
|
|
|
mozilla::LogicalSize ComputedSizeWithBorderPadding() const {
|
|
mozilla::WritingMode wm = GetWritingMode();
|
|
return mozilla::LogicalSize(wm,
|
|
ComputedISize() +
|
|
ComputedLogicalBorderPadding().IStartEnd(wm),
|
|
ComputedBSize() +
|
|
ComputedLogicalBorderPadding().BStartEnd(wm));
|
|
}
|
|
|
|
mozilla::LogicalSize
|
|
ComputedSizeWithBorderPadding(mozilla::WritingMode aWM) const {
|
|
return ComputedSizeWithBorderPadding().ConvertTo(aWM, GetWritingMode());
|
|
}
|
|
|
|
mozilla::LogicalSize
|
|
ComputedSizeWithMarginBorderPadding() const {
|
|
mozilla::WritingMode wm = GetWritingMode();
|
|
return mozilla::LogicalSize(wm,
|
|
ComputedISize() +
|
|
ComputedLogicalMargin().IStartEnd(wm) +
|
|
ComputedLogicalBorderPadding().IStartEnd(wm),
|
|
ComputedBSize() +
|
|
ComputedLogicalMargin().BStartEnd(wm) +
|
|
ComputedLogicalBorderPadding().BStartEnd(wm));
|
|
}
|
|
|
|
mozilla::LogicalSize
|
|
ComputedSizeWithMarginBorderPadding(mozilla::WritingMode aWM) const {
|
|
return ComputedSizeWithMarginBorderPadding().ConvertTo(aWM,
|
|
GetWritingMode());
|
|
}
|
|
|
|
nsSize
|
|
ComputedPhysicalSize() const {
|
|
return nsSize(ComputedWidth(), ComputedHeight());
|
|
}
|
|
|
|
// XXX this will need to change when we make mComputedOffsets logical;
|
|
// we won't be able to return a reference for the physical offsets
|
|
const nsMargin& ComputedPhysicalOffsets() const { return mComputedOffsets; }
|
|
nsMargin& ComputedPhysicalOffsets() { return mComputedOffsets; }
|
|
|
|
const LogicalMargin ComputedLogicalOffsets() const
|
|
{ return LogicalMargin(mWritingMode, mComputedOffsets); }
|
|
|
|
void SetComputedLogicalOffsets(const LogicalMargin& aOffsets)
|
|
{ mComputedOffsets = aOffsets.GetPhysicalMargin(mWritingMode); }
|
|
|
|
// Return the state's computed size including border-padding, with
|
|
// unconstrained dimensions replaced by zero.
|
|
nsSize ComputedSizeAsContainerIfConstrained() const {
|
|
const nscoord wd = ComputedWidth();
|
|
const nscoord ht = ComputedHeight();
|
|
return nsSize(wd == NS_UNCONSTRAINEDSIZE
|
|
? 0 : wd + ComputedPhysicalBorderPadding().LeftRight(),
|
|
ht == NS_UNCONSTRAINEDSIZE
|
|
? 0 : ht + ComputedPhysicalBorderPadding().TopBottom());
|
|
}
|
|
|
|
private:
|
|
// the available width in which to reflow the frame. The space
|
|
// represents the amount of room for the frame's margin, border,
|
|
// padding, and content area. The frame size you choose should fit
|
|
// within the available width.
|
|
nscoord mAvailableWidth;
|
|
|
|
// A value of NS_UNCONSTRAINEDSIZE for the available height means
|
|
// you can choose whatever size you want. In galley mode the
|
|
// available height is always NS_UNCONSTRAINEDSIZE, and only page
|
|
// mode or multi-column layout involves a constrained height. The
|
|
// element's the top border and padding, and content, must fit. If the
|
|
// element is complete after reflow then its bottom border, padding
|
|
// and margin (and similar for its complete ancestors) will need to
|
|
// fit in this height.
|
|
nscoord mAvailableHeight;
|
|
|
|
// The computed width specifies the frame's content area width, and it does
|
|
// not apply to inline non-replaced elements
|
|
//
|
|
// For replaced inline frames, a value of NS_INTRINSICSIZE means you should
|
|
// use your intrinsic width as the computed width
|
|
//
|
|
// For block-level frames, the computed width is based on the width of the
|
|
// containing block, the margin/border/padding areas, and the min/max width.
|
|
nscoord mComputedWidth;
|
|
|
|
// The computed height specifies the frame's content height, and it does
|
|
// not apply to inline non-replaced elements
|
|
//
|
|
// For replaced inline frames, a value of NS_INTRINSICSIZE means you should
|
|
// use your intrinsic height as the computed height
|
|
//
|
|
// For non-replaced block-level frames in the flow and floated, a value of
|
|
// NS_AUTOHEIGHT means you choose a height to shrink wrap around the normal
|
|
// flow child frames. The height must be within the limit of the min/max
|
|
// height if there is such a limit
|
|
//
|
|
// For replaced block-level frames, a value of NS_INTRINSICSIZE
|
|
// means you use your intrinsic height as the computed height
|
|
nscoord mComputedHeight;
|
|
|
|
// Computed values for 'left/top/right/bottom' offsets. Only applies to
|
|
// 'positioned' elements. These are PHYSICAL coordinates (for now).
|
|
nsMargin mComputedOffsets;
|
|
|
|
// Computed values for 'min-width/max-width' and 'min-height/max-height'
|
|
// XXXldb The width ones here should go; they should be needed only
|
|
// internally.
|
|
nscoord mComputedMinWidth, mComputedMaxWidth;
|
|
nscoord mComputedMinHeight, mComputedMaxHeight;
|
|
|
|
public:
|
|
// Cached pointers to the various style structs used during intialization
|
|
const nsStyleDisplay* mStyleDisplay;
|
|
const nsStyleVisibility* mStyleVisibility;
|
|
const nsStylePosition* mStylePosition;
|
|
const nsStyleBorder* mStyleBorder;
|
|
const nsStyleMargin* mStyleMargin;
|
|
const nsStylePadding* mStylePadding;
|
|
const nsStyleText* mStyleText;
|
|
|
|
bool IsFloating() const;
|
|
|
|
uint8_t GetDisplay() const;
|
|
|
|
// a frame (e.g. nsTableCellFrame) which may need to generate a special
|
|
// reflow for percent bsize calculations
|
|
nsIPercentBSizeObserver* mPercentBSizeObserver;
|
|
|
|
// CSS margin collapsing sometimes requires us to reflow
|
|
// optimistically assuming that margins collapse to see if clearance
|
|
// is required. When we discover that clearance is required, we
|
|
// store the frame in which clearance was discovered to the location
|
|
// requested here.
|
|
nsIFrame** mDiscoveredClearance;
|
|
|
|
// This value keeps track of how deeply nested a given reflow state
|
|
// is from the top of the frame tree.
|
|
int16_t mReflowDepth;
|
|
ReflowInputFlags mFlags;
|
|
|
|
// Logical and physical accessors for the resize flags. All users should go
|
|
// via these accessors, so that in due course we can change the storage from
|
|
// physical to logical.
|
|
bool IsHResize() const {
|
|
return mWritingMode.IsVertical() ? mFlags.mIsBResize : mFlags.mIsIResize;
|
|
}
|
|
bool IsVResize() const {
|
|
return mWritingMode.IsVertical() ? mFlags.mIsIResize : mFlags.mIsBResize;
|
|
}
|
|
bool IsIResize() const {
|
|
return mFlags.mIsIResize;
|
|
}
|
|
bool IsBResize() const {
|
|
return mFlags.mIsBResize;
|
|
}
|
|
bool IsBResizeForWM(mozilla::WritingMode aWM) const {
|
|
return aWM.IsOrthogonalTo(mWritingMode) ? mFlags.mIsIResize
|
|
: mFlags.mIsBResize;
|
|
}
|
|
void SetHResize(bool aValue) {
|
|
if (mWritingMode.IsVertical()) {
|
|
mFlags.mIsBResize = aValue;
|
|
} else {
|
|
mFlags.mIsIResize = aValue;
|
|
}
|
|
}
|
|
void SetVResize(bool aValue) {
|
|
if (mWritingMode.IsVertical()) {
|
|
mFlags.mIsIResize = aValue;
|
|
} else {
|
|
mFlags.mIsBResize = aValue;
|
|
}
|
|
}
|
|
void SetIResize(bool aValue) {
|
|
mFlags.mIsIResize = aValue;
|
|
}
|
|
void SetBResize(bool aValue) {
|
|
mFlags.mIsBResize = aValue;
|
|
}
|
|
|
|
// Note: The copy constructor is written by the compiler automatically. You
|
|
// can use that and then override specific values if you want, or you can
|
|
// call Init as desired...
|
|
|
|
/**
|
|
* Initialize a ROOT reflow state.
|
|
*
|
|
* @param aPresContext Must be equal to aFrame->PresContext().
|
|
* @param aFrame The frame for whose reflow state is being constructed.
|
|
* @param aRenderingContext The rendering context to be used for measurements.
|
|
* @param aAvailableSpace See comments for availableHeight and availableWidth
|
|
* members.
|
|
* @param aFlags A set of flags used for additional boolean parameters (see
|
|
* below).
|
|
*/
|
|
ReflowInput(nsPresContext* aPresContext,
|
|
nsIFrame* aFrame,
|
|
nsRenderingContext* aRenderingContext,
|
|
const mozilla::LogicalSize& aAvailableSpace,
|
|
uint32_t aFlags = 0);
|
|
|
|
/**
|
|
* Initialize a reflow state for a child frame's reflow. Some parts of the
|
|
* state are copied from the parent's reflow state. The remainder is computed.
|
|
*
|
|
* @param aPresContext Must be equal to aFrame->PresContext().
|
|
* @param aParentReflowInput A reference to an ReflowInput object that
|
|
* is to be the parent of this object.
|
|
* @param aFrame The frame for whose reflow state is being constructed.
|
|
* @param aAvailableSpace See comments for availableHeight and availableWidth
|
|
* members.
|
|
* @param aContainingBlockSize An optional size, in app units, specifying
|
|
* the containing block size to use instead of the default which is
|
|
* to use the aAvailableSpace.
|
|
* @param aFlags A set of flags used for additional boolean parameters (see
|
|
* below).
|
|
*/
|
|
ReflowInput(nsPresContext* aPresContext,
|
|
const ReflowInput& aParentReflowInput,
|
|
nsIFrame* aFrame,
|
|
const mozilla::LogicalSize& aAvailableSpace,
|
|
const mozilla::LogicalSize* aContainingBlockSize = nullptr,
|
|
uint32_t aFlags = 0);
|
|
|
|
// Values for |aFlags| passed to constructor
|
|
enum {
|
|
// Indicates that the parent of this reflow state is "fake" (see
|
|
// mDummyParentReflowInput in mFlags).
|
|
DUMMY_PARENT_REFLOW_STATE = (1<<0),
|
|
|
|
// Indicates that the calling function will initialize the reflow state, and
|
|
// that the constructor should not call Init().
|
|
CALLER_WILL_INIT = (1<<1),
|
|
|
|
// The caller wants shrink-wrap behavior (i.e. ComputeSizeFlags::eShrinkWrap
|
|
// will be passed to ComputeSize()).
|
|
COMPUTE_SIZE_SHRINK_WRAP = (1<<2),
|
|
|
|
// The caller wants 'auto' bsize behavior (ComputeSizeFlags::eUseAutoBSize
|
|
// will be be passed to ComputeSize()).
|
|
COMPUTE_SIZE_USE_AUTO_BSIZE = (1<<3),
|
|
|
|
// The caller wants the abs.pos. static-position resolved at the origin
|
|
// of the containing block, i.e. at LogicalPoint(0, 0).
|
|
STATIC_POS_IS_CB_ORIGIN = (1<<4),
|
|
};
|
|
|
|
// This method initializes various data members. It is automatically
|
|
// called by the various constructors
|
|
void Init(nsPresContext* aPresContext,
|
|
const mozilla::LogicalSize* aContainingBlockSize = nullptr,
|
|
const nsMargin* aBorder = nullptr,
|
|
const nsMargin* aPadding = nullptr);
|
|
|
|
/**
|
|
* Find the content isize of our containing block for the given writing mode,
|
|
* which need not be the same as the reflow state's mode.
|
|
*/
|
|
nscoord GetContainingBlockContentISize(mozilla::WritingMode aWritingMode) const;
|
|
|
|
/**
|
|
* Calculate the used line-height property. The return value will be >= 0.
|
|
*/
|
|
nscoord CalcLineHeight() const;
|
|
|
|
/**
|
|
* Same as CalcLineHeight() above, but doesn't need a reflow state.
|
|
*
|
|
* @param aBlockBSize The computed block size of the content rect of the block
|
|
* that the line should fill.
|
|
* Only used with line-height:-moz-block-height.
|
|
* NS_AUTOHEIGHT results in a normal line-height for
|
|
* line-height:-moz-block-height.
|
|
* @param aFontSizeInflation The result of the appropriate
|
|
* nsLayoutUtils::FontSizeInflationFor call,
|
|
* or 1.0 if during intrinsic size
|
|
* calculation.
|
|
*/
|
|
static nscoord CalcLineHeight(nsIContent* aContent,
|
|
nsStyleContext* aStyleContext,
|
|
nscoord aBlockBSize,
|
|
float aFontSizeInflation);
|
|
|
|
|
|
mozilla::LogicalSize ComputeContainingBlockRectangle(
|
|
nsPresContext* aPresContext,
|
|
const ReflowInput* aContainingBlockRI) const;
|
|
|
|
/**
|
|
* Apply the mComputed(Min/Max)Width constraints to the content
|
|
* size computed so far.
|
|
*/
|
|
nscoord ApplyMinMaxWidth(nscoord aWidth) const {
|
|
if (NS_UNCONSTRAINEDSIZE != ComputedMaxWidth()) {
|
|
aWidth = std::min(aWidth, ComputedMaxWidth());
|
|
}
|
|
return std::max(aWidth, ComputedMinWidth());
|
|
}
|
|
|
|
/**
|
|
* Apply the mComputed(Min/Max)ISize constraints to the content
|
|
* size computed so far.
|
|
*/
|
|
nscoord ApplyMinMaxISize(nscoord aISize) const {
|
|
if (NS_UNCONSTRAINEDSIZE != ComputedMaxISize()) {
|
|
aISize = std::min(aISize, ComputedMaxISize());
|
|
}
|
|
return std::max(aISize, ComputedMinISize());
|
|
}
|
|
|
|
/**
|
|
* Apply the mComputed(Min/Max)Height constraints to the content
|
|
* size computed so far.
|
|
*
|
|
* @param aHeight The height that we've computed an to which we want to apply
|
|
* min/max constraints.
|
|
* @param aConsumed The amount of the computed height that was consumed by
|
|
* our prev-in-flows.
|
|
*/
|
|
nscoord ApplyMinMaxHeight(nscoord aHeight, nscoord aConsumed = 0) const {
|
|
aHeight += aConsumed;
|
|
|
|
if (NS_UNCONSTRAINEDSIZE != ComputedMaxHeight()) {
|
|
aHeight = std::min(aHeight, ComputedMaxHeight());
|
|
}
|
|
|
|
if (NS_UNCONSTRAINEDSIZE != ComputedMinHeight()) {
|
|
aHeight = std::max(aHeight, ComputedMinHeight());
|
|
}
|
|
|
|
return aHeight - aConsumed;
|
|
}
|
|
|
|
/**
|
|
* Apply the mComputed(Min/Max)BSize constraints to the content
|
|
* size computed so far.
|
|
*
|
|
* @param aBSize The block-size that we've computed an to which we want to apply
|
|
* min/max constraints.
|
|
* @param aConsumed The amount of the computed block-size that was consumed by
|
|
* our prev-in-flows.
|
|
*/
|
|
nscoord ApplyMinMaxBSize(nscoord aBSize, nscoord aConsumed = 0) const {
|
|
aBSize += aConsumed;
|
|
|
|
if (NS_UNCONSTRAINEDSIZE != ComputedMaxBSize()) {
|
|
aBSize = std::min(aBSize, ComputedMaxBSize());
|
|
}
|
|
|
|
if (NS_UNCONSTRAINEDSIZE != ComputedMinBSize()) {
|
|
aBSize = std::max(aBSize, ComputedMinBSize());
|
|
}
|
|
|
|
return aBSize - aConsumed;
|
|
}
|
|
|
|
bool ShouldReflowAllKids() const {
|
|
// Note that we could make a stronger optimization for IsBResize if
|
|
// we use it in a ShouldReflowChild test that replaces the current
|
|
// checks of NS_FRAME_IS_DIRTY | NS_FRAME_HAS_DIRTY_CHILDREN, if it
|
|
// were tested there along with NS_FRAME_CONTAINS_RELATIVE_BSIZE.
|
|
// This would need to be combined with a slight change in which
|
|
// frames NS_FRAME_CONTAINS_RELATIVE_BSIZE is marked on.
|
|
return (mFrame->GetStateBits() & NS_FRAME_IS_DIRTY) ||
|
|
IsIResize() ||
|
|
(IsBResize() &&
|
|
(mFrame->GetStateBits() & NS_FRAME_CONTAINS_RELATIVE_BSIZE));
|
|
}
|
|
|
|
// This method doesn't apply min/max computed widths to the value passed in.
|
|
void SetComputedWidth(nscoord aComputedWidth);
|
|
|
|
// This method doesn't apply min/max computed heights to the value passed in.
|
|
void SetComputedHeight(nscoord aComputedHeight);
|
|
|
|
void SetComputedISize(nscoord aComputedISize) {
|
|
if (mWritingMode.IsVertical()) {
|
|
SetComputedHeight(aComputedISize);
|
|
} else {
|
|
SetComputedWidth(aComputedISize);
|
|
}
|
|
}
|
|
|
|
void SetComputedBSize(nscoord aComputedBSize) {
|
|
if (mWritingMode.IsVertical()) {
|
|
SetComputedWidth(aComputedBSize);
|
|
} else {
|
|
SetComputedHeight(aComputedBSize);
|
|
}
|
|
}
|
|
|
|
void SetComputedBSizeWithoutResettingResizeFlags(nscoord aComputedBSize) {
|
|
// Viewport frames reset the computed block size on a copy of their reflow
|
|
// state when reflowing fixed-pos kids. In that case we actually don't
|
|
// want to mess with the resize flags, because comparing the frame's rect
|
|
// to the munged computed isize is pointless.
|
|
ComputedBSize() = aComputedBSize;
|
|
}
|
|
|
|
void SetTruncated(const ReflowOutput& aMetrics, nsReflowStatus* aStatus) const;
|
|
|
|
bool WillReflowAgainForClearance() const {
|
|
return mDiscoveredClearance && *mDiscoveredClearance;
|
|
}
|
|
|
|
// Compute the offsets for a relative position element
|
|
static void ComputeRelativeOffsets(mozilla::WritingMode aWM,
|
|
nsIFrame* aFrame,
|
|
const mozilla::LogicalSize& aCBSize,
|
|
nsMargin& aComputedOffsets);
|
|
|
|
// If a relatively positioned element, adjust the position appropriately.
|
|
static void ApplyRelativePositioning(nsIFrame* aFrame,
|
|
const nsMargin& aComputedOffsets,
|
|
nsPoint* aPosition);
|
|
|
|
void ApplyRelativePositioning(nsPoint* aPosition) const {
|
|
ApplyRelativePositioning(mFrame, ComputedPhysicalOffsets(), aPosition);
|
|
}
|
|
|
|
static void
|
|
ApplyRelativePositioning(nsIFrame* aFrame,
|
|
mozilla::WritingMode aWritingMode,
|
|
const mozilla::LogicalMargin& aComputedOffsets,
|
|
mozilla::LogicalPoint* aPosition,
|
|
const nsSize& aContainerSize) {
|
|
// Subtract the size of the frame from the container size that we
|
|
// use for converting between the logical and physical origins of
|
|
// the frame. This accounts for the fact that logical origins in RTL
|
|
// coordinate systems are at the top right of the frame instead of
|
|
// the top left.
|
|
nsSize frameSize = aFrame->GetSize();
|
|
nsPoint pos = aPosition->GetPhysicalPoint(aWritingMode,
|
|
aContainerSize - frameSize);
|
|
ApplyRelativePositioning(aFrame,
|
|
aComputedOffsets.GetPhysicalMargin(aWritingMode),
|
|
&pos);
|
|
*aPosition = mozilla::LogicalPoint(aWritingMode, pos,
|
|
aContainerSize - frameSize);
|
|
}
|
|
|
|
void ApplyRelativePositioning(mozilla::LogicalPoint* aPosition,
|
|
const nsSize& aContainerSize) const {
|
|
ApplyRelativePositioning(mFrame, mWritingMode,
|
|
ComputedLogicalOffsets(), aPosition,
|
|
aContainerSize);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
// Reflow trace methods. Defined in nsFrame.cpp so they have access
|
|
// to the display-reflow infrastructure.
|
|
static void* DisplayInitConstraintsEnter(nsIFrame* aFrame,
|
|
ReflowInput* aState,
|
|
nscoord aCBISize,
|
|
nscoord aCBBSize,
|
|
const nsMargin* aBorder,
|
|
const nsMargin* aPadding);
|
|
static void DisplayInitConstraintsExit(nsIFrame* aFrame,
|
|
ReflowInput* aState,
|
|
void* aValue);
|
|
static void* DisplayInitFrameTypeEnter(nsIFrame* aFrame,
|
|
ReflowInput* aState);
|
|
static void DisplayInitFrameTypeExit(nsIFrame* aFrame,
|
|
ReflowInput* aState,
|
|
void* aValue);
|
|
#endif
|
|
|
|
protected:
|
|
void InitFrameType(nsIAtom* aFrameType);
|
|
void InitCBReflowInput();
|
|
void InitResizeFlags(nsPresContext* aPresContext, nsIAtom* aFrameType);
|
|
|
|
void InitConstraints(nsPresContext* aPresContext,
|
|
const mozilla::LogicalSize& aContainingBlockSize,
|
|
const nsMargin* aBorder,
|
|
const nsMargin* aPadding,
|
|
nsIAtom* aFrameType);
|
|
|
|
// Returns the nearest containing block or block frame (whether or not
|
|
// it is a containing block) for the specified frame. Also returns
|
|
// the inline-start edge and logical size of the containing block's
|
|
// content area.
|
|
// These are returned in the coordinate space of the containing block.
|
|
nsIFrame* GetHypotheticalBoxContainer(nsIFrame* aFrame,
|
|
nscoord& aCBIStartEdge,
|
|
mozilla::LogicalSize& aCBSize) const;
|
|
|
|
// Calculate a "hypothetical box" position where the placeholder frame
|
|
// (for a position:fixed/absolute element) would have been placed if it were
|
|
// positioned statically. The hypothetical box position will have a writing
|
|
// mode with the same block direction as the absolute containing block
|
|
// (cbrs->frame), though it may differ in inline direction.
|
|
void CalculateHypotheticalPosition(nsPresContext* aPresContext,
|
|
nsIFrame* aPlaceholderFrame,
|
|
const ReflowInput* cbrs,
|
|
nsHypotheticalPosition& aHypotheticalPos,
|
|
nsIAtom* aFrameType) const;
|
|
|
|
void InitAbsoluteConstraints(nsPresContext* aPresContext,
|
|
const ReflowInput* cbrs,
|
|
const mozilla::LogicalSize& aContainingBlockSize,
|
|
nsIAtom* aFrameType);
|
|
|
|
// Calculates the computed values for the 'min-Width', 'max-Width',
|
|
// 'min-Height', and 'max-Height' properties, and stores them in the assorted
|
|
// data members
|
|
void ComputeMinMaxValues(const mozilla::LogicalSize& aContainingBlockSize);
|
|
|
|
// aInsideBoxSizing returns the part of the padding, border, and margin
|
|
// in the aAxis dimension that goes inside the edge given by box-sizing;
|
|
// aOutsideBoxSizing returns the rest.
|
|
void CalculateBorderPaddingMargin(mozilla::LogicalAxis aAxis,
|
|
nscoord aContainingBlockSize,
|
|
nscoord* aInsideBoxSizing,
|
|
nscoord* aOutsideBoxSizing) const;
|
|
|
|
void CalculateBlockSideMargins(nsIAtom* aFrameType);
|
|
};
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_ReflowInput_h
|