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04af168c74
This patch shouldn't change the behavior. * It's OK to get the item's offset only when its relatively positioned, because `ApplyRelativePositioning` doesn't use the offset parameter if the frame is sticky positioned. Document `ApplyRelativePositioning`'s parameters to clarify this. Also, we don't need to call apply relative positioning to a non-relatively-and-non-sticky-positioned item. * Print `FLEX_LOG` after applying relative-positioning because `aFramePos` will be adjusted in `ApplyRelativePositioning`, and we really want to see the item's "final position". * `aReflowInput` parameter is removed because it's only used to get flex container's WritingMode. We can get it from FlexItem. Differential Revision: https://phabricator.services.mozilla.com/D140703
1040 lines
44 KiB
C++
1040 lines
44 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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 "nsStyleConsts.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/EnumSet.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/WritingModes.h"
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#include "LayoutConstants.h"
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#include "ReflowOutput.h"
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#include <algorithm>
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class gfxContext;
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class nsFloatManager;
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struct nsHypotheticalPosition;
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class nsIPercentBSizeObserver;
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class nsLineLayout;
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class nsPlaceholderFrame;
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class nsPresContext;
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class nsReflowStatus;
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namespace mozilla {
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enum class LayoutFrameType : uint8_t;
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/**
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* A set of StyleSizes used as an input parameter to various functions that
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* compute sizes like nsIFrame::ComputeSize(). If any of the member fields has a
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* value, the function may use the value instead of retrieving it from the
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* frame's style.
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*
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* The logical sizes are assumed to be in the associated frame's writing-mode.
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*/
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struct StyleSizeOverrides {
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Maybe<StyleSize> mStyleISize;
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Maybe<StyleSize> mStyleBSize;
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Maybe<AspectRatio> mAspectRatio;
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bool HasAnyOverrides() const { return mStyleISize || mStyleBSize; }
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bool HasAnyLengthOverrides() const {
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return (mStyleISize && mStyleISize->ConvertsToLength()) ||
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(mStyleBSize && mStyleBSize->ConvertsToLength());
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}
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// By default, table wrapper frame considers the size overrides applied to
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// itself, so it creates any length size overrides for inner table frame by
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// subtracting the area occupied by the caption and border & padding according
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// to box-sizing.
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//
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// When this flag is true, table wrapper frame is required to apply the size
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// overrides to the inner table frame directly, without any modification,
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// which is useful for flex container to override the inner table frame's
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// preferred main size with 'flex-basis'.
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//
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// Note: if mStyleISize is a LengthPercentage, the inner table frame will
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// comply with the inline-size override without enforcing its min-content
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// inline-size in nsTableFrame::ComputeSize(). This is necessary so that small
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// flex-basis values like 'flex-basis:1%' can be resolved correctly; the
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// flexbox layout algorithm does still explicitly clamp to min-sizes *at a
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// later step*, after the flex-basis has been resolved -- so this flag won't
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// actually produce any user-visible tables whose final inline size is smaller
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// than their min-content inline size.
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bool mApplyOverridesVerbatim = false;
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};
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} // namespace mozilla
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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 NS_CSS_MINMAX(NumericType aValue, NumericType aMinValue,
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NumericType aMaxValue) {
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NumericType result = aValue;
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if (aMaxValue < result) result = aMaxValue;
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if (aMinValue > result) result = aMinValue;
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return result;
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}
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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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// The frame being reflowed.
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nsIFrame* mFrame;
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// Rendering context to use for measurement.
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gfxContext* mRenderingContext;
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nsMargin ComputedPhysicalMargin() const {
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return mComputedMargin.GetPhysicalMargin(mWritingMode);
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}
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nsMargin ComputedPhysicalBorderPadding() const {
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return mComputedBorderPadding.GetPhysicalMargin(mWritingMode);
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}
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nsMargin ComputedPhysicalPadding() const {
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return mComputedPadding.GetPhysicalMargin(mWritingMode);
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}
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mozilla::LogicalMargin ComputedLogicalMargin(mozilla::WritingMode aWM) const {
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return mComputedMargin.ConvertTo(aWM, mWritingMode);
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}
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mozilla::LogicalMargin ComputedLogicalBorderPadding(
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mozilla::WritingMode aWM) const {
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return mComputedBorderPadding.ConvertTo(aWM, mWritingMode);
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}
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mozilla::LogicalMargin ComputedLogicalPadding(
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mozilla::WritingMode aWM) const {
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return mComputedPadding.ConvertTo(aWM, mWritingMode);
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}
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mozilla::LogicalMargin ComputedLogicalBorder(mozilla::WritingMode aWM) const {
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return (mComputedBorderPadding - mComputedPadding)
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.ConvertTo(aWM, mWritingMode);
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}
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void SetComputedLogicalMargin(mozilla::WritingMode aWM,
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const mozilla::LogicalMargin& aMargin) {
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mComputedMargin = aMargin.ConvertTo(mWritingMode, aWM);
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}
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void SetComputedLogicalBorderPadding(
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mozilla::WritingMode aWM, const mozilla::LogicalMargin& aBorderPadding) {
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mComputedBorderPadding = aBorderPadding.ConvertTo(mWritingMode, aWM);
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}
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void SetComputedLogicalPadding(mozilla::WritingMode aWM,
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const mozilla::LogicalMargin& aPadding) {
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mComputedPadding = aPadding.ConvertTo(mWritingMode, aWM);
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}
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mozilla::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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mozilla::WritingMode mWritingMode;
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// Computed margin values
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mozilla::LogicalMargin mComputedMargin;
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// Cached copy of the border + padding values
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mozilla::LogicalMargin mComputedBorderPadding;
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// Computed padding values
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mozilla::LogicalMargin 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, gfxContext* aRenderingContext);
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SizeComputationInput(nsIFrame* aFrame, gfxContext* aRenderingContext,
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mozilla::WritingMode aContainingBlockWritingMode,
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nscoord aContainingBlockISize,
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const mozilla::Maybe<mozilla::LogicalMargin>& aBorder =
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mozilla::Nothing(),
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const mozilla::Maybe<mozilla::LogicalMargin>& aPadding =
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mozilla::Nothing());
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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(nsIFrame* aFrame,
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SizeComputationInput* aState,
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nscoord aPercentBasis,
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mozilla::WritingMode aCBWritingMode,
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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 aCBWM Writing mode of the containing block
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* @param aPercentBasis
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* Inline size of the containing block (in its own writing mode), to use
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* for resolving percentage margin values in the inline and block axes.
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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 aCBWM, nscoord aPercentBasis,
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mozilla::LayoutFrameType aFrameType);
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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 aCBWM Writing mode of the containing block
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* @param aPercentBasis
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* Inline size of the containing block (in its own writing mode), to use
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* for resolving percentage padding values in the inline and block axes.
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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 aCBWM, nscoord aPercentBasis,
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mozilla::LayoutFrameType aFrameType);
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protected:
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void InitOffsets(mozilla::WritingMode aCBWM, nscoord aPercentBasis,
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mozilla::LayoutFrameType aFrameType,
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mozilla::ComputeSizeFlags aFlags = {},
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const mozilla::Maybe<mozilla::LogicalMargin>& aBorder =
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mozilla::Nothing(),
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const mozilla::Maybe<mozilla::LogicalMargin>& aPadding =
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mozilla::Nothing(),
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const nsStyleDisplay* aDisplay = nullptr);
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/*
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* Convert StyleSize or StyleMaxSize to nscoord when percentages depend on the
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* inline size of the containing block, and enumerated values are for inline
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* size, min-inline-size, or max-inline-size. Does not handle auto inline
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* sizes.
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*/
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template <typename SizeOrMaxSize>
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inline nscoord ComputeISizeValue(const WritingMode aWM,
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const LogicalSize& aContainingBlockSize,
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const LogicalSize& aContentEdgeToBoxSizing,
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nscoord aBoxSizingToMarginEdge,
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const SizeOrMaxSize&) const;
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// same as previous, but using mComputedBorderPadding, mComputedPadding,
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// and mComputedMargin
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template <typename SizeOrMaxSize>
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inline nscoord ComputeISizeValue(const LogicalSize& aContainingBlockSize,
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mozilla::StyleBoxSizing aBoxSizing,
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const SizeOrMaxSize&) const;
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nscoord ComputeBSizeValue(nscoord aContainingBlockBSize,
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mozilla::StyleBoxSizing aBoxSizing,
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const mozilla::LengthPercentage& 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 inputs are linked together. this is the pointer to the
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// parent's reflow input
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const ReflowInput* mParentReflowInput = nullptr;
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// A non-owning pointer to the float manager associated with this area,
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// which points to the object owned by nsAutoFloatManager::mNew.
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nsFloatManager* mFloatManager = nullptr;
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// LineLayout object (only for inline reflow; set to nullptr otherwise)
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nsLineLayout* mLineLayout = nullptr;
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// The appropriate reflow input for the containing block (for
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// percentage widths, etc.) of this reflow input's frame. It will be setup
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// properly in InitCBReflowInput().
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const ReflowInput* mCBReflowInput = nullptr;
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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 = 0;
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// If a ReflowInput finds itself initialized with an unconstrained
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// inline-size, it will look up its parentReflowInput chain for a reflow input
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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 input, 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 PresShell.
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nscoord mOrthogonalLimit = NS_UNCONSTRAINEDSIZE;
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// Physical accessors for the private fields. They are needed for
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// compatibility with not-yet-updated code. New code should use the accessors
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// for logical coordinates, unless the code really works on physical
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// coordinates.
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nscoord AvailableWidth() const { return mAvailableSize.Width(mWritingMode); }
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nscoord AvailableHeight() const {
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return mAvailableSize.Height(mWritingMode);
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}
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nscoord ComputedWidth() const { return mComputedSize.Width(mWritingMode); }
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nscoord ComputedHeight() const { return mComputedSize.Height(mWritingMode); }
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nscoord ComputedMinWidth() const {
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return mComputedMinSize.Width(mWritingMode);
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}
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nscoord ComputedMaxWidth() const {
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return mComputedMaxSize.Width(mWritingMode);
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}
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nscoord ComputedMinHeight() const {
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return mComputedMinSize.Height(mWritingMode);
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}
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nscoord ComputedMaxHeight() const {
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return mComputedMaxSize.Height(mWritingMode);
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}
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// Logical accessors for private fields in mWritingMode.
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nscoord AvailableISize() const { return mAvailableSize.ISize(mWritingMode); }
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nscoord AvailableBSize() const { return mAvailableSize.BSize(mWritingMode); }
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nscoord ComputedISize() const { return mComputedSize.ISize(mWritingMode); }
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nscoord ComputedBSize() const { return mComputedSize.BSize(mWritingMode); }
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nscoord ComputedMinISize() const {
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return mComputedMinSize.ISize(mWritingMode);
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}
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nscoord ComputedMaxISize() const {
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return mComputedMaxSize.ISize(mWritingMode);
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}
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nscoord ComputedMinBSize() const {
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return mComputedMinSize.BSize(mWritingMode);
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}
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nscoord ComputedMaxBSize() const {
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return mComputedMaxSize.BSize(mWritingMode);
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}
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nscoord& AvailableISize() { return mAvailableSize.ISize(mWritingMode); }
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nscoord& AvailableBSize() { return mAvailableSize.BSize(mWritingMode); }
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nscoord& ComputedISize() { return mComputedSize.ISize(mWritingMode); }
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nscoord& ComputedBSize() { return mComputedSize.BSize(mWritingMode); }
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nscoord& ComputedMinISize() { return mComputedMinSize.ISize(mWritingMode); }
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nscoord& ComputedMaxISize() { return mComputedMaxSize.ISize(mWritingMode); }
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nscoord& ComputedMinBSize() { return mComputedMinSize.BSize(mWritingMode); }
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nscoord& ComputedMaxBSize() { return mComputedMaxSize.BSize(mWritingMode); }
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mozilla::LogicalSize AvailableSize() const { return mAvailableSize; }
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mozilla::LogicalSize ComputedSize() const { return mComputedSize; }
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mozilla::LogicalSize ComputedMinSize() const { return mComputedMinSize; }
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mozilla::LogicalSize ComputedMaxSize() const { return mComputedMaxSize; }
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mozilla::LogicalSize AvailableSize(mozilla::WritingMode aWM) const {
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return AvailableSize().ConvertTo(aWM, mWritingMode);
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}
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mozilla::LogicalSize ComputedSize(mozilla::WritingMode aWM) const {
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return ComputedSize().ConvertTo(aWM, mWritingMode);
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}
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mozilla::LogicalSize ComputedMinSize(mozilla::WritingMode aWM) const {
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return ComputedMinSize().ConvertTo(aWM, mWritingMode);
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}
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mozilla::LogicalSize ComputedMaxSize(mozilla::WritingMode aWM) const {
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return ComputedMaxSize().ConvertTo(aWM, mWritingMode);
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}
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mozilla::LogicalSize ComputedSizeWithPadding(mozilla::WritingMode aWM) const {
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return ComputedSize(aWM) + ComputedLogicalPadding(aWM).Size(aWM);
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}
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mozilla::LogicalSize ComputedSizeWithBorderPadding(
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mozilla::WritingMode aWM) const {
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return ComputedSize(aWM) + ComputedLogicalBorderPadding(aWM).Size(aWM);
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}
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mozilla::LogicalSize ComputedSizeWithMarginBorderPadding(
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mozilla::WritingMode aWM) const {
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return ComputedSizeWithBorderPadding(aWM) +
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ComputedLogicalMargin(aWM).Size(aWM);
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}
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nsSize ComputedPhysicalSize() const {
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return nsSize(ComputedWidth(), ComputedHeight());
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}
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nsMargin ComputedPhysicalOffsets() const {
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return mComputedOffsets.GetPhysicalMargin(mWritingMode);
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}
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LogicalMargin ComputedLogicalOffsets(mozilla::WritingMode aWM) const {
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return mComputedOffsets.ConvertTo(aWM, mWritingMode);
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}
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void SetComputedLogicalOffsets(mozilla::WritingMode aWM,
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const LogicalMargin& aOffsets) {
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mComputedOffsets = aOffsets.ConvertTo(mWritingMode, aWM);
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}
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// Return ReflowInput's computed size including border-padding, with
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// unconstrained dimensions replaced by zero.
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nsSize ComputedSizeAsContainerIfConstrained() const {
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const nscoord wd = ComputedWidth();
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const nscoord ht = ComputedHeight();
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return nsSize(wd == NS_UNCONSTRAINEDSIZE
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? 0
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: wd + ComputedPhysicalBorderPadding().LeftRight(),
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ht == NS_UNCONSTRAINEDSIZE
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? 0
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: ht + ComputedPhysicalBorderPadding().TopBottom());
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}
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// Our saved containing block dimensions.
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LogicalSize mContainingBlockSize{mWritingMode};
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// Cached pointers to the various style structs used during initialization.
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const nsStyleDisplay* mStyleDisplay = nullptr;
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const nsStyleVisibility* mStyleVisibility = nullptr;
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const nsStylePosition* mStylePosition = nullptr;
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const nsStyleBorder* mStyleBorder = nullptr;
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const nsStyleMargin* mStyleMargin = nullptr;
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const nsStylePadding* mStylePadding = nullptr;
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const nsStyleText* mStyleText = nullptr;
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enum class BreakType : uint8_t {
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Auto,
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Column,
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Page,
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};
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BreakType mBreakType = BreakType::Auto;
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// a frame (e.g. nsTableCellFrame) which may need to generate a special
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// reflow for percent bsize calculations
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nsIPercentBSizeObserver* mPercentBSizeObserver = nullptr;
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// CSS margin collapsing sometimes requires us to reflow
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// optimistically assuming that margins collapse to see if clearance
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// is required. When we discover that clearance is required, we
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// store the frame in which clearance was discovered to the location
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// requested here.
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nsIFrame** mDiscoveredClearance = nullptr;
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struct Flags {
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Flags() { memset(this, 0, sizeof(*this)); }
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// cached mFrame->IsFrameOfType(nsIFrame::eReplaced) ||
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// mFrame->IsFrameOfType(nsIFrame::eReplacedContainsBlock)
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bool mIsReplaced : 1;
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// 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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bool mSpecialBSizeReflow : 1;
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// nothing in the frame's next-in-flow (or its descendants) is changing
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bool mNextInFlowUntouched : 1;
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// Is the current context at the top of a page? When true, we force
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// something that's too tall for a page/column to fit anyway to avoid
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// infinite loops.
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bool mIsTopOfPage : 1;
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|
|
// parent frame is an nsIScrollableFrame and it is assuming a horizontal
|
|
// scrollbar
|
|
bool mAssumingHScrollbar : 1;
|
|
|
|
// parent frame is an nsIScrollableFrame and it is assuming a vertical
|
|
// scrollbar
|
|
bool mAssumingVScrollbar : 1;
|
|
|
|
// Is frame a different inline-size than before?
|
|
bool mIsIResize : 1;
|
|
|
|
// Is frame (potentially) a different block-size than before?
|
|
// This includes cases where the block-size is 'auto' and the
|
|
// contents or width have changed.
|
|
bool mIsBResize : 1;
|
|
|
|
// Has this frame changed block-size in a way that affects
|
|
// block-size percentages on frames for which it is the containing
|
|
// block? This includes a change between 'auto' and a length that
|
|
// doesn't actually change the frame's block-size. It does not
|
|
// include cases where the block-size is 'auto' and the frame's
|
|
// contents have changed.
|
|
//
|
|
// In the current code, this is only true when mIsBResize is also
|
|
// true, although it doesn't necessarily need to be that way (e.g.,
|
|
// in the case of a frame changing from 'auto' to a length that
|
|
// produces the same height).
|
|
bool mIsBResizeForPercentages : 1;
|
|
|
|
// tables are splittable, this should happen only inside a page and never
|
|
// insider a column frame
|
|
bool mTableIsSplittable : 1;
|
|
|
|
// Does frame height depend on an ancestor table-cell?
|
|
bool mHeightDependsOnAncestorCell : 1;
|
|
|
|
// nsColumnSetFrame is balancing columns
|
|
bool mIsColumnBalancing : 1;
|
|
|
|
// True if ColumnSetWrapperFrame has a constrained block-size, and is going
|
|
// to consume all of its block-size in this fragment. This bit is passed to
|
|
// nsColumnSetFrame to determine whether to give up balancing and create
|
|
// overflow columns.
|
|
bool mColumnSetWrapperHasNoBSizeLeft : 1;
|
|
|
|
// If this flag is set, the BSize of this frame should be considered
|
|
// indefinite for the purposes of percent resolution on child frames (we
|
|
// should behave as if ComputedBSize() were NS_UNCONSTRAINEDSIZE when doing
|
|
// percent resolution against this.ComputedBSize()). For example: flex
|
|
// items may have their ComputedBSize() resolved ahead-of-time by their
|
|
// flex container, and yet their BSize might have to be considered
|
|
// indefinite per https://drafts.csswg.org/css-flexbox/#definite-sizes
|
|
bool mTreatBSizeAsIndefinite : 1;
|
|
|
|
// a "fake" reflow input made in order to be the parent of a real one
|
|
bool mDummyParentReflowInput : 1;
|
|
|
|
// Should this frame reflow its place-holder children? If the available
|
|
// height of this frame didn't change, but its in a paginated environment
|
|
// (e.g. columns), it should always reflow its placeholder children.
|
|
bool mMustReflowPlaceholders : 1;
|
|
|
|
// the STATIC_POS_IS_CB_ORIGIN ctor flag
|
|
bool mStaticPosIsCBOrigin : 1;
|
|
|
|
// If set, the following two flags indicate that:
|
|
// (1) this frame is absolutely-positioned (or fixed-positioned).
|
|
// (2) this frame's static position depends on the CSS Box Alignment.
|
|
// (3) we do need to compute the static position, because the frame's
|
|
// {Inline and/or Block} offsets actually depend on it.
|
|
// When these bits are set, the offset values (IStart/IEnd, BStart/BEnd)
|
|
// represent the "start" edge of the frame's CSS Box Alignment container
|
|
// area, in that axis -- and these offsets need to be further-resolved
|
|
// (with CSS Box Alignment) after we know the OOF frame's size.
|
|
// NOTE: The "I" and "B" (for "Inline" and "Block") refer the axes of the
|
|
// *containing block's writing-mode*, NOT mFrame's own writing-mode. This
|
|
// is purely for convenience, since that's the writing-mode we're dealing
|
|
// with when we set & react to these bits.
|
|
bool mIOffsetsNeedCSSAlign : 1;
|
|
bool mBOffsetsNeedCSSAlign : 1;
|
|
|
|
// Are we somewhere inside an element with -webkit-line-clamp set?
|
|
// This flag is inherited into descendant ReflowInputs, but we don't bother
|
|
// resetting it to false when crossing over into a block descendant that
|
|
// -webkit-line-clamp skips over (such as a BFC).
|
|
bool mInsideLineClamp : 1;
|
|
|
|
// Is this a flex item, and should we add or remove a -webkit-line-clamp
|
|
// ellipsis on a descendant line? It's possible for this flag to be true
|
|
// when mInsideLineClamp is false if we previously had a numeric
|
|
// -webkit-line-clamp value, but now have 'none' and we need to find the
|
|
// line with the ellipsis flag and clear it.
|
|
// This flag is not inherited into descendant ReflowInputs.
|
|
bool mApplyLineClamp : 1;
|
|
|
|
// Is this frame or one of its ancestors being reflowed in a different
|
|
// continuation than the one in which it was previously reflowed? In
|
|
// other words, has it moved to a different column or page than it was in
|
|
// the previous reflow?
|
|
//
|
|
// FIXME: For now, we only ensure that this is set correctly for blocks.
|
|
// This is okay because the only thing that uses it only cares about
|
|
// whether there's been a fragment change within the same block formatting
|
|
// context.
|
|
bool mMovedBlockFragments : 1;
|
|
|
|
// Is the block-size computed by aspect-ratio and inline size (i.e. block
|
|
// axis is the ratio-dependent axis)? We set this flag so that we can check
|
|
// whether to apply automatic content-based minimum sizes once we know the
|
|
// children's block-size (after reflowing them).
|
|
// https://drafts.csswg.org/css-sizing-4/#aspect-ratio-minimum
|
|
bool mIsBSizeSetByAspectRatio : 1;
|
|
};
|
|
Flags mFlags;
|
|
|
|
mozilla::StyleSizeOverrides mStyleSizeOverrides;
|
|
|
|
mozilla::ComputeSizeFlags mComputeSizeFlags;
|
|
|
|
// This value keeps track of how deeply nested a given reflow input
|
|
// is from the top of the frame tree.
|
|
int16_t mReflowDepth = 0;
|
|
|
|
// Logical and physical accessors for the resize flags.
|
|
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;
|
|
}
|
|
bool IsBResizeForPercentagesForWM(mozilla::WritingMode aWM) const {
|
|
// This uses the relatively-accurate mIsBResizeForPercentages flag
|
|
// when the writing modes are parallel, and is a bit more
|
|
// pessimistic when orthogonal.
|
|
return !aWM.IsOrthogonalTo(mWritingMode) ? mFlags.mIsBResizeForPercentages
|
|
: IsIResize();
|
|
}
|
|
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; }
|
|
|
|
// Values for |aFlags| passed to constructor
|
|
enum class InitFlag : uint8_t {
|
|
// Indicates that the parent of this reflow input is "fake" (see
|
|
// mDummyParentReflowInput in mFlags).
|
|
DummyParentReflowInput,
|
|
|
|
// Indicates that the calling function will initialize the reflow input, and
|
|
// that the constructor should not call Init().
|
|
CallerWillInit,
|
|
|
|
// The caller wants the abs.pos. static-position resolved at the origin of
|
|
// the containing block, i.e. at LogicalPoint(0, 0). (Note that this
|
|
// doesn't necessarily mean that (0, 0) is the *correct* static position
|
|
// for the frame in question.)
|
|
// @note In a Grid container's masonry axis we'll always use
|
|
// the placeholder's position in that axis regardless of this flag.
|
|
StaticPosIsCBOrigin,
|
|
};
|
|
using InitFlags = mozilla::EnumSet<InitFlag>;
|
|
|
|
// 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 input.
|
|
*
|
|
* @param aPresContext Must be equal to aFrame->PresContext().
|
|
* @param aFrame The frame for whose reflow input is being constructed.
|
|
* @param aRenderingContext The rendering context to be used for measurements.
|
|
* @param aAvailableSpace The available space to reflow aFrame (in aFrame's
|
|
* writing-mode). See comments for mAvailableSize for more information.
|
|
* @param aFlags A set of flags used for additional boolean parameters (see
|
|
* InitFlags above).
|
|
*/
|
|
ReflowInput(nsPresContext* aPresContext, nsIFrame* aFrame,
|
|
gfxContext* aRenderingContext,
|
|
const mozilla::LogicalSize& aAvailableSpace,
|
|
InitFlags aFlags = {});
|
|
|
|
/**
|
|
* Initialize a reflow input for a child frame's reflow. Some parts of the
|
|
* state are copied from the parent's reflow input. 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 input is being constructed.
|
|
* @param aAvailableSpace The available space to reflow aFrame (in aFrame's
|
|
* writing-mode). See comments for mAvailableSize for more information.
|
|
* @param aContainingBlockSize An optional size (in aFrame's writing mode),
|
|
* specifying the containing block size to use instead of the default
|
|
* size computed by ComputeContainingBlockRectangle(). If
|
|
* InitFlag::CallerWillInit is used, this is ignored. Pass it via
|
|
* Init() instead.
|
|
* @param aFlags A set of flags used for additional boolean parameters (see
|
|
* InitFlags above).
|
|
* @param aStyleSizeOverrides The style data used to override mFrame's when we
|
|
* call nsIFrame::ComputeSize() internally.
|
|
* @param aComputeSizeFlags A set of flags used when we call
|
|
* nsIFrame::ComputeSize() internally.
|
|
*/
|
|
ReflowInput(nsPresContext* aPresContext,
|
|
const ReflowInput& aParentReflowInput, nsIFrame* aFrame,
|
|
const mozilla::LogicalSize& aAvailableSpace,
|
|
const mozilla::Maybe<mozilla::LogicalSize>& aContainingBlockSize =
|
|
mozilla::Nothing(),
|
|
InitFlags aFlags = {},
|
|
const mozilla::StyleSizeOverrides& aSizeOverrides = {},
|
|
mozilla::ComputeSizeFlags aComputeSizeFlags = {});
|
|
|
|
/**
|
|
* This method initializes various data members. It is automatically called by
|
|
* the constructors if InitFlags::CallerWillInit is *not* used.
|
|
*
|
|
* @param aContainingBlockSize An optional size (in mFrame's writing mode),
|
|
* specifying the containing block size to use instead of the default
|
|
* size computed by ComputeContainingBlockRectangle().
|
|
* @param aBorder An optional border (in mFrame's writing mode). If given, use
|
|
* it instead of the border computed from mFrame's StyleBorder.
|
|
* @param aPadding An optional padding (in mFrame's writing mode). If given,
|
|
* use it instead of the padding computing from mFrame's StylePadding.
|
|
*/
|
|
void Init(nsPresContext* aPresContext,
|
|
const mozilla::Maybe<mozilla::LogicalSize>& aContainingBlockSize =
|
|
mozilla::Nothing(),
|
|
const mozilla::Maybe<mozilla::LogicalMargin>& aBorder =
|
|
mozilla::Nothing(),
|
|
const mozilla::Maybe<mozilla::LogicalMargin>& aPadding =
|
|
mozilla::Nothing());
|
|
|
|
/**
|
|
* Get the used line-height property. The return value will be >= 0.
|
|
*/
|
|
nscoord GetLineHeight() const;
|
|
|
|
/**
|
|
* Set the used line-height. aLineHeight must be >= 0.
|
|
*/
|
|
void SetLineHeight(nscoord aLineHeight);
|
|
|
|
/**
|
|
* Calculate the used line-height property without a reflow input instance.
|
|
* The return value will be >= 0.
|
|
*
|
|
* @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_UNCONSTRAINEDSIZE
|
|
* 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,
|
|
ComputedStyle* aComputedStyle,
|
|
nsPresContext* aPresContext,
|
|
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;
|
|
|
|
// This method doesn't apply min/max computed widths to the value passed in.
|
|
void SetComputedWidth(nscoord aComputedWidth) {
|
|
if (mWritingMode.IsVertical()) {
|
|
SetComputedBSize(aComputedWidth);
|
|
} else {
|
|
SetComputedISize(aComputedWidth);
|
|
}
|
|
}
|
|
|
|
// This method doesn't apply min/max computed heights to the value passed in.
|
|
void SetComputedHeight(nscoord aComputedHeight) {
|
|
if (mWritingMode.IsVertical()) {
|
|
SetComputedISize(aComputedHeight);
|
|
} else {
|
|
SetComputedBSize(aComputedHeight);
|
|
}
|
|
}
|
|
|
|
// This method doesn't apply min/max computed inline-sizes to the value passed
|
|
// in.
|
|
void SetComputedISize(nscoord aComputedISize);
|
|
|
|
// These methods don't apply min/max computed block-sizes to the value passed
|
|
// in.
|
|
void SetComputedBSize(nscoord aComputedBSize);
|
|
void SetComputedBSizeWithoutResettingResizeFlags(nscoord aComputedBSize) {
|
|
// Viewport frames reset the computed block size on a copy of their reflow
|
|
// input 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.
|
|
MOZ_ASSERT(aComputedBSize >= 0, "Invalid computed block-size!");
|
|
ComputedBSize() = aComputedBSize;
|
|
}
|
|
|
|
void SetTruncated(const ReflowOutput& aMetrics,
|
|
nsReflowStatus* aStatus) const;
|
|
|
|
bool WillReflowAgainForClearance() const {
|
|
return mDiscoveredClearance && *mDiscoveredClearance;
|
|
}
|
|
|
|
// Compute the offsets for a relative position element
|
|
//
|
|
// @param aWM the writing mode of aCBSize and the returned offsets.
|
|
static mozilla::LogicalMargin ComputeRelativeOffsets(
|
|
mozilla::WritingMode aWM, nsIFrame* aFrame,
|
|
const mozilla::LogicalSize& aCBSize);
|
|
|
|
// If aFrame is a relatively or sticky positioned element, adjust aPosition
|
|
// appropriately.
|
|
//
|
|
// @param aComputedOffsets aFrame's relative offset, either from the cached
|
|
// nsIFrame::ComputedOffsetProperty() or ComputedPhysicalOffsets().
|
|
// Note: This parameter is used only when aFrame is relatively
|
|
// positioned, not sticky positioned.
|
|
// @param aPosition [in/out] Pass aFrame's normal position (pre-relative
|
|
// positioning), and this method will update it to indicate aFrame's
|
|
// actual position.
|
|
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);
|
|
|
|
void ApplyRelativePositioning(mozilla::LogicalPoint* aPosition,
|
|
const nsSize& aContainerSize) const {
|
|
ApplyRelativePositioning(mFrame, mWritingMode,
|
|
ComputedLogicalOffsets(mWritingMode), aPosition,
|
|
aContainerSize);
|
|
}
|
|
|
|
// Resolve any block-axis 'auto' margins (if any) for an absolutely positioned
|
|
// frame. aMargin and aOffsets are both outparams (though we only touch
|
|
// aOffsets if the position is overconstrained)
|
|
static void ComputeAbsPosBlockAutoMargin(nscoord aAvailMarginSpace,
|
|
WritingMode aContainingBlockWM,
|
|
bool aIsMarginBStartAuto,
|
|
bool aIsMarginBEndAuto,
|
|
LogicalMargin& aMargin,
|
|
LogicalMargin& aOffsets);
|
|
|
|
// Resolve any inline-axis 'auto' margins (if any) for an absolutely
|
|
// positioned frame. aMargin and aOffsets are both outparams (though we only
|
|
// touch aOffsets if the position is overconstrained)
|
|
static void ComputeAbsPosInlineAutoMargin(nscoord aAvailMarginSpace,
|
|
WritingMode aContainingBlockWM,
|
|
bool aIsMarginIStartAuto,
|
|
bool aIsMarginIEndAuto,
|
|
LogicalMargin& aMargin,
|
|
LogicalMargin& aOffsets);
|
|
|
|
#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 InitCBReflowInput();
|
|
void InitResizeFlags(nsPresContext* aPresContext,
|
|
mozilla::LayoutFrameType aFrameType);
|
|
void InitDynamicReflowRoot();
|
|
|
|
void InitConstraints(
|
|
nsPresContext* aPresContext,
|
|
const mozilla::Maybe<mozilla::LogicalSize>& aContainingBlockSize,
|
|
const mozilla::Maybe<mozilla::LogicalMargin>& aBorder,
|
|
const mozilla::Maybe<mozilla::LogicalMargin>& aPadding,
|
|
mozilla::LayoutFrameType 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
|
|
// (aCBReflowInput->frame), though it may differ in inline direction.
|
|
void CalculateHypotheticalPosition(nsPresContext* aPresContext,
|
|
nsPlaceholderFrame* aPlaceholderFrame,
|
|
const ReflowInput* aCBReflowInput,
|
|
nsHypotheticalPosition& aHypotheticalPos,
|
|
mozilla::LayoutFrameType aFrameType) const;
|
|
|
|
// Check if we can use the resolved auto block size (by insets) to compute
|
|
// the inline size through aspect-ratio on absolute-positioned elements.
|
|
// This is only needed for non-replaced elements.
|
|
// https://drafts.csswg.org/css-position/#abspos-auto-size
|
|
bool IsInlineSizeComputableByBlockSizeAndAspectRatio(
|
|
nscoord aBlockSize) const;
|
|
|
|
// This calculates the size by using the resolved auto block size (from
|
|
// non-auto block insets), according to the writing mode of current block.
|
|
LogicalSize CalculateAbsoluteSizeWithResolvedAutoBlockSize(
|
|
nscoord aAutoBSize, const LogicalSize& aTentativeComputedSize);
|
|
|
|
void InitAbsoluteConstraints(nsPresContext* aPresContext,
|
|
const ReflowInput* aCBReflowInput,
|
|
const mozilla::LogicalSize& aContainingBlockSize,
|
|
mozilla::LayoutFrameType aFrameType);
|
|
|
|
// Calculates the computed values for the 'min-inline-size',
|
|
// 'max-inline-size', 'min-block-size', and 'max-block-size' properties, and
|
|
// stores them in the assorted data members
|
|
void ComputeMinMaxValues(const mozilla::LogicalSize& aCBSize);
|
|
|
|
// 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();
|
|
|
|
/**
|
|
* @return true if mFrame is an internal table frame, i.e. an
|
|
* ns[RowGroup|ColGroup|Row|Cell]Frame. (We exclude nsTableColFrame
|
|
* here since we never setup a ReflowInput for those.)
|
|
*/
|
|
bool IsInternalTableFrame() const;
|
|
|
|
private:
|
|
// The available size in which to reflow the frame. The space represents the
|
|
// amount of room for the frame's margin, border, padding, and content area.
|
|
//
|
|
// The available inline-size should be constrained. The frame's inline-size
|
|
// you choose should fit within it.
|
|
|
|
// In galley mode, the available block-size is always unconstrained, and only
|
|
// page mode or multi-column layout involves a constrained available
|
|
// block-size.
|
|
//
|
|
// An unconstrained available block-size means you can choose whatever size
|
|
// you want. If the value is constrained, the frame's block-start border,
|
|
// padding, and content, must fit. If a frame is fully-complete after reflow,
|
|
// then its block-end border, padding, and margin (and similar for its
|
|
// fully-complete ancestors) will need to fit within this available
|
|
// block-size. However, if a frame is monolithic, it may choose a block-size
|
|
// larger than the available block-size.
|
|
mozilla::LogicalSize mAvailableSize{mWritingMode};
|
|
|
|
// The computed size specifies the frame's content area, and it does not apply
|
|
// to inline non-replaced elements.
|
|
//
|
|
// For block-level frames, the computed inline-size is based on the
|
|
// inline-size of the containing block, the margin/border/padding areas, and
|
|
// the min/max inline-size.
|
|
//
|
|
// For non-replaced block-level frames in the flow and floated, if the
|
|
// computed block-size is NS_UNCONSTRAINEDSIZE, you should choose a block-size
|
|
// to shrink wrap around the normal flow child frames. The block-size must be
|
|
// within the limit of the min/max block-size if there is such a limit.
|
|
mozilla::LogicalSize mComputedSize{mWritingMode};
|
|
|
|
// Computed values for 'inset' properties. Only applies to 'positioned'
|
|
// elements.
|
|
mozilla::LogicalMargin mComputedOffsets{mWritingMode};
|
|
|
|
// Computed value for 'min-inline-size'/'min-block-size'.
|
|
mozilla::LogicalSize mComputedMinSize{mWritingMode};
|
|
|
|
// Computed value for 'max-inline-size'/'max-block-size'.
|
|
mozilla::LogicalSize mComputedMaxSize{mWritingMode, NS_UNCONSTRAINEDSIZE,
|
|
NS_UNCONSTRAINEDSIZE};
|
|
|
|
// Cache the used line-height property.
|
|
mutable nscoord mLineHeight = NS_UNCONSTRAINEDSIZE;
|
|
};
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_ReflowInput_h
|