mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
5f0a00a9eb
Move the AssertNoDuplicateContinuations in DrainPushedFloats earlier because DrainOverflowLines() sometimes picks up overflow line with a placeholder for a float that has a next-in-flow in this block and unmark those floats as pushed floats because they aren't anymore. Change AppendPushedFloat to push any next-in-flows that are in the same block as the given float too. Make DoCollectFloats collect next-in-flows in the same block. Make VerifyOverflowSituation check some float list invariants too.
317 lines
12 KiB
C++
317 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
/* state used in reflow of block frames */
|
|
|
|
#ifndef nsBlockReflowState_h__
|
|
#define nsBlockReflowState_h__
|
|
|
|
#include "nsFloatManager.h"
|
|
#include "nsLineBox.h"
|
|
#include "nsHTMLReflowState.h"
|
|
|
|
class nsBlockFrame;
|
|
class nsFrameList;
|
|
class nsOverflowContinuationTracker;
|
|
|
|
// block reflow state flags
|
|
#define BRS_UNCONSTRAINEDBSIZE 0x00000001
|
|
#define BRS_ISBSTARTMARGINROOT 0x00000002 // Is this frame a root for block
|
|
#define BRS_ISBENDMARGINROOT 0x00000004 // direction start/end margin collapsing?
|
|
#define BRS_APPLYBSTARTMARGIN 0x00000008 // See ShouldApplyTopMargin
|
|
#define BRS_ISFIRSTINFLOW 0x00000010
|
|
// Set when mLineAdjacentToTop is valid
|
|
#define BRS_HAVELINEADJACENTTOTOP 0x00000020
|
|
// Set when the block has the equivalent of NS_BLOCK_FLOAT_MGR
|
|
#define BRS_FLOAT_MGR 0x00000040
|
|
// Set when nsLineLayout::LineIsEmpty was true at the end of reflowing
|
|
// the current line
|
|
#define BRS_LINE_LAYOUT_EMPTY 0x00000080
|
|
#define BRS_ISOVERFLOWCONTAINER 0x00000100
|
|
// Our mPushedFloats list is stored on the blocks' proptable
|
|
#define BRS_PROPTABLE_FLOATCLIST 0x00000200
|
|
// Set when the pref layout.float-fragments-inside-column.enabled is true.
|
|
#define BRS_FLOAT_FRAGMENTS_INSIDE_COLUMN_ENABLED 0x00000400
|
|
#define BRS_LASTFLAG BRS_FLOAT_FRAGMENTS_INSIDE_COLUMN_ENABLED
|
|
|
|
class nsBlockReflowState {
|
|
public:
|
|
nsBlockReflowState(const nsHTMLReflowState& aReflowState,
|
|
nsPresContext* aPresContext,
|
|
nsBlockFrame* aFrame,
|
|
bool aBStartMarginRoot, bool aBEndMarginRoot,
|
|
bool aBlockNeedsFloatManager,
|
|
nscoord aConsumedBSize = NS_INTRINSICSIZE);
|
|
|
|
/**
|
|
* Get the available reflow space (the area not occupied by floats)
|
|
* for the current y coordinate. The available space is relative to
|
|
* our coordinate system, which is the content box, with (0, 0) in the
|
|
* upper left.
|
|
*
|
|
* Returns whether there are floats present at the given block-direction
|
|
* coordinate and within the inline size of the content rect.
|
|
*/
|
|
nsFlowAreaRect GetFloatAvailableSpace() const
|
|
{ return GetFloatAvailableSpace(mBCoord); }
|
|
nsFlowAreaRect GetFloatAvailableSpace(nscoord aBCoord) const
|
|
{ return GetFloatAvailableSpaceWithState(aBCoord, nullptr); }
|
|
nsFlowAreaRect
|
|
GetFloatAvailableSpaceWithState(nscoord aBCoord,
|
|
nsFloatManager::SavedState *aState) const;
|
|
nsFlowAreaRect
|
|
GetFloatAvailableSpaceForBSize(nscoord aBCoord, nscoord aBSize,
|
|
nsFloatManager::SavedState *aState) const;
|
|
|
|
/*
|
|
* The following functions all return true if they were able to
|
|
* place the float, false if the float did not fit in available
|
|
* space.
|
|
* aLineLayout is null when we are reflowing pushed floats (because
|
|
* they are not associated with a line box).
|
|
*/
|
|
bool AddFloat(nsLineLayout* aLineLayout,
|
|
nsIFrame* aFloat,
|
|
nscoord aAvailableISize);
|
|
private:
|
|
bool CanPlaceFloat(nscoord aFloatISize,
|
|
const nsFlowAreaRect& aFloatAvailableSpace);
|
|
public:
|
|
bool FlowAndPlaceFloat(nsIFrame* aFloat);
|
|
private:
|
|
void PushFloatPastBreak(nsIFrame* aFloat);
|
|
public:
|
|
void PlaceBelowCurrentLineFloats(nsFloatCacheFreeList& aFloats,
|
|
nsLineBox* aLine);
|
|
|
|
// Returns the first coordinate >= aBCoord that clears the
|
|
// floats indicated by aBreakType and has enough inline size between floats
|
|
// (or no floats remaining) to accomodate aReplacedBlock.
|
|
nscoord ClearFloats(nscoord aBCoord, uint8_t aBreakType,
|
|
nsIFrame *aReplacedBlock = nullptr,
|
|
uint32_t aFlags = 0);
|
|
|
|
bool IsAdjacentWithTop() const {
|
|
return mBCoord == mBorderPadding.BStart(mReflowState.GetWritingMode());
|
|
}
|
|
|
|
/**
|
|
* Return mBlock's computed physical border+padding with GetSkipSides applied.
|
|
*/
|
|
const mozilla::LogicalMargin& BorderPadding() const {
|
|
return mBorderPadding;
|
|
}
|
|
|
|
/**
|
|
* Retrieve the block-direction size "consumed" by any previous-in-flows.
|
|
*/
|
|
nscoord GetConsumedBSize();
|
|
|
|
// Reconstruct the previous block-end margin that goes before |aLine|.
|
|
void ReconstructMarginBefore(nsLineList::iterator aLine);
|
|
|
|
// Caller must have called GetAvailableSpace for the correct position
|
|
// (which need not be the current mBCoord).
|
|
void ComputeReplacedBlockOffsetsForFloats(nsIFrame* aFrame,
|
|
const mozilla::LogicalRect& aFloatAvailableSpace,
|
|
nscoord& aIStartResult,
|
|
nscoord& aIEndResult);
|
|
|
|
// Caller must have called GetAvailableSpace for the current mBCoord
|
|
void ComputeBlockAvailSpace(nsIFrame* aFrame,
|
|
const nsStyleDisplay* aDisplay,
|
|
const nsFlowAreaRect& aFloatAvailableSpace,
|
|
bool aBlockAvoidsFloats,
|
|
mozilla::LogicalRect& aResult);
|
|
|
|
protected:
|
|
void RecoverFloats(nsLineList::iterator aLine, nscoord aDeltaBCoord);
|
|
|
|
public:
|
|
void RecoverStateFrom(nsLineList::iterator aLine, nscoord aDeltaBCoord);
|
|
|
|
void AdvanceToNextLine() {
|
|
if (GetFlag(BRS_LINE_LAYOUT_EMPTY)) {
|
|
SetFlag(BRS_LINE_LAYOUT_EMPTY, false);
|
|
} else {
|
|
mLineNumber++;
|
|
}
|
|
}
|
|
|
|
//----------------------------------------
|
|
|
|
// This state is the "global" state computed once for the reflow of
|
|
// the block.
|
|
|
|
// The block frame that is using this object
|
|
nsBlockFrame* mBlock;
|
|
|
|
nsPresContext* mPresContext;
|
|
|
|
const nsHTMLReflowState& mReflowState;
|
|
|
|
nsFloatManager* mFloatManager;
|
|
|
|
// The coordinates within the float manager where the block is being
|
|
// placed <b>after</b> taking into account the blocks border and
|
|
// padding. This, therefore, represents the inner "content area" (in
|
|
// spacemanager coordinates) where child frames will be placed,
|
|
// including child blocks and floats.
|
|
mozilla::WritingMode mFloatManagerWM;
|
|
mozilla::LogicalPoint mFloatManagerOrigin;
|
|
|
|
// XXX get rid of this
|
|
nsReflowStatus mReflowStatus;
|
|
|
|
// The float manager state as it was before the contents of this
|
|
// block. This is needed for positioning bullets, since we only want
|
|
// to move the bullet to flow around floats that were before this
|
|
// block, not floats inside of it.
|
|
nsFloatManager::SavedState mFloatManagerStateBefore;
|
|
|
|
nscoord mBEndEdge;
|
|
|
|
// The content area to reflow child frames within. This is within
|
|
// this frame's coordinate system and writing mode, which means
|
|
// mContentArea.IStart == BorderPadding().IStart and
|
|
// mContentArea.BStart == BorderPadding().BStart.
|
|
// The block size may be NS_UNCONSTRAINEDSIZE, which indicates that there
|
|
// is no page/column boundary below (the common case).
|
|
// mContentArea.BEnd() should only be called after checking that
|
|
// mContentArea.BSize is not NS_UNCONSTRAINEDSIZE; otherwise
|
|
// coordinate overflow may occur.
|
|
mozilla::LogicalRect mContentArea;
|
|
nscoord ContentIStart() const {
|
|
return mContentArea.IStart(mReflowState.GetWritingMode());
|
|
}
|
|
nscoord ContentISize() const {
|
|
return mContentArea.ISize(mReflowState.GetWritingMode());
|
|
}
|
|
nscoord ContentIEnd() const {
|
|
return mContentArea.IEnd(mReflowState.GetWritingMode());
|
|
}
|
|
nscoord ContentBStart() const {
|
|
return mContentArea.BStart(mReflowState.GetWritingMode());
|
|
}
|
|
nscoord ContentBSize() const {
|
|
return mContentArea.BSize(mReflowState.GetWritingMode());
|
|
}
|
|
nscoord ContentBEnd() const {
|
|
return mContentArea.BEnd(mReflowState.GetWritingMode());
|
|
}
|
|
mozilla::LogicalSize ContentSize(mozilla::WritingMode aWM) const {
|
|
mozilla::WritingMode wm = mReflowState.GetWritingMode();
|
|
return mContentArea.Size(wm).ConvertTo(aWM, wm);
|
|
}
|
|
|
|
// Physical width. Use only for physical <-> logical coordinate conversion.
|
|
nscoord mContainerWidth;
|
|
|
|
// Continuation out-of-flow float frames that need to move to our
|
|
// next in flow are placed here during reflow. It's a pointer to
|
|
// a frame list stored in the block's property table.
|
|
nsFrameList *mPushedFloats;
|
|
// This method makes sure pushed floats are accessible to
|
|
// StealFrame. Call it before adding any frames to mPushedFloats.
|
|
void SetupPushedFloatList();
|
|
/**
|
|
* Append aFloatCont and its next-in-flows within the same block to
|
|
* mPushedFloats. aFloatCont should not be on any child list when
|
|
* making this call. Its next-in-flows will be removed from
|
|
* mBlock using StealFrame() before being added to mPushedFloats.
|
|
* All appended frames will be marked NS_FRAME_IS_PUSHED_FLOAT.
|
|
*/
|
|
void AppendPushedFloatChain(nsIFrame* aFloatCont);
|
|
|
|
// Track child overflow continuations.
|
|
nsOverflowContinuationTracker* mOverflowTracker;
|
|
|
|
//----------------------------------------
|
|
|
|
// This state is "running" state updated by the reflow of each line
|
|
// in the block. This same state is "recovered" when a line is not
|
|
// dirty and is passed over during incremental reflow.
|
|
|
|
// The current line being reflowed
|
|
// If it is mBlock->end_lines(), then it is invalid.
|
|
nsLineList::iterator mCurrentLine;
|
|
|
|
// When BRS_HAVELINEADJACENTTOTOP is set, this refers to a line
|
|
// which we know is adjacent to the top of the block (in other words,
|
|
// all lines before it are empty and do not have clearance. This line is
|
|
// always before the current line.
|
|
nsLineList::iterator mLineAdjacentToTop;
|
|
|
|
// The current block-direction coordinate in the block
|
|
nscoord mBCoord;
|
|
|
|
// mBlock's computed physical border+padding with GetSkipSides applied.
|
|
mozilla::LogicalMargin mBorderPadding;
|
|
|
|
// The overflow areas of all floats placed so far
|
|
nsOverflowAreas mFloatOverflowAreas;
|
|
|
|
nsFloatCacheFreeList mFloatCacheFreeList;
|
|
|
|
// Previous child. This is used when pulling up a frame to update
|
|
// the sibling list.
|
|
nsIFrame* mPrevChild;
|
|
|
|
// The previous child frames collapsed bottom margin value.
|
|
nsCollapsingMargin mPrevBEndMargin;
|
|
|
|
// The current next-in-flow for the block. When lines are pulled
|
|
// from a next-in-flow, this is used to know which next-in-flow to
|
|
// pull from. When a next-in-flow is emptied of lines, we advance
|
|
// this to the next next-in-flow.
|
|
nsBlockFrame* mNextInFlow;
|
|
|
|
//----------------------------------------
|
|
|
|
// Temporary line-reflow state. This state is used during the reflow
|
|
// of a given line, but doesn't have meaning before or after.
|
|
|
|
// The list of floats that are "current-line" floats. These are
|
|
// added to the line after the line has been reflowed, to keep the
|
|
// list fiddling from being N^2.
|
|
nsFloatCacheFreeList mCurrentLineFloats;
|
|
|
|
// The list of floats which are "below current-line"
|
|
// floats. These are reflowed/placed after the line is reflowed
|
|
// and placed. Again, this is done to keep the list fiddling from
|
|
// being N^2.
|
|
nsFloatCacheFreeList mBelowCurrentLineFloats;
|
|
|
|
nscoord mMinLineHeight;
|
|
|
|
int32_t mLineNumber;
|
|
|
|
int16_t mFlags;
|
|
|
|
uint8_t mFloatBreakType;
|
|
|
|
// The amount of computed block-direction size "consumed" by previous-in-flows.
|
|
nscoord mConsumedBSize;
|
|
|
|
void SetFlag(uint32_t aFlag, bool aValue)
|
|
{
|
|
NS_ASSERTION(aFlag<=BRS_LASTFLAG, "bad flag");
|
|
if (aValue) { // set flag
|
|
mFlags |= aFlag;
|
|
}
|
|
else { // unset flag
|
|
mFlags &= ~aFlag;
|
|
}
|
|
}
|
|
|
|
bool GetFlag(uint32_t aFlag) const
|
|
{
|
|
NS_ASSERTION(aFlag<=BRS_LASTFLAG, "bad flag");
|
|
return !!(mFlags & aFlag);
|
|
}
|
|
};
|
|
|
|
#endif // nsBlockReflowState_h__
|