mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
a692880c23
Backed out changeset 19848fff857e (bug 743402) Backed out changeset 049168537ae0 (bug 743402) Backed out changeset 3098fea37f2d (bug 743402) Backed out changeset ada93e976dca (bug 743402) Backed out changeset c7907c54187f (bug 743402) Backed out changeset 2edbbf6440c4 (bug 743402)
996 lines
36 KiB
C++
996 lines
36 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
// vim:cindent:ts=2:et:sw=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/. */
|
|
|
|
/*
|
|
* rendering object for CSS display:block, inline-block, and list-item
|
|
* boxes, also used for various anonymous boxes
|
|
*/
|
|
|
|
#ifndef nsBlockFrame_h___
|
|
#define nsBlockFrame_h___
|
|
|
|
#include "nsContainerFrame.h"
|
|
#include "nsHTMLParts.h"
|
|
#include "nsLineBox.h"
|
|
#include "nsCSSPseudoElements.h"
|
|
#include "nsStyleSet.h"
|
|
#include "nsFloatManager.h"
|
|
|
|
enum LineReflowStatus {
|
|
// The line was completely reflowed and fit in available width, and we should
|
|
// try to pull up content from the next line if possible.
|
|
LINE_REFLOW_OK,
|
|
// The line was completely reflowed and fit in available width, but we should
|
|
// not try to pull up content from the next line.
|
|
LINE_REFLOW_STOP,
|
|
// We need to reflow the line again at its current vertical position. The
|
|
// new reflow should not try to pull up any frames from the next line.
|
|
LINE_REFLOW_REDO_NO_PULL,
|
|
// We need to reflow the line again using the floats from its height
|
|
// this reflow, since its height made it hit floats that were not
|
|
// adjacent to its top.
|
|
LINE_REFLOW_REDO_MORE_FLOATS,
|
|
// We need to reflow the line again at a lower vertical postion where there
|
|
// may be more horizontal space due to different float configuration.
|
|
LINE_REFLOW_REDO_NEXT_BAND,
|
|
// The line did not fit in the available vertical space. Try pushing it to
|
|
// the next page or column if it's not the first line on the current page/column.
|
|
LINE_REFLOW_TRUNCATED
|
|
};
|
|
|
|
class nsBlockReflowState;
|
|
class nsBlockInFlowLineIterator;
|
|
class nsBulletFrame;
|
|
class nsLineBox;
|
|
class nsFirstLineFrame;
|
|
class nsIntervalSet;
|
|
|
|
/**
|
|
* Some invariants:
|
|
* -- The overflow out-of-flows list contains the out-of-
|
|
* flow frames whose placeholders are in the overflow list.
|
|
* -- A given piece of content has at most one placeholder
|
|
* frame in a block's normal child list.
|
|
* -- While a block is being reflowed, and from then until
|
|
* its next-in-flow is reflowed it may have a
|
|
* PushedFloatProperty frame property that points to
|
|
* an nsFrameList. This list contains continuations for
|
|
* floats whose prev-in-flow is in the block's regular float
|
|
* list and first-in-flows of floats that did not fit, but
|
|
* whose placeholders are in the block or one of its
|
|
* prev-in-flows.
|
|
* -- In all these frame lists, if there are two frames for
|
|
* the same content appearing in the list, then the frames
|
|
* appear with the prev-in-flow before the next-in-flow.
|
|
* -- While reflowing a block, its overflow line list
|
|
* will usually be empty but in some cases will have lines
|
|
* (while we reflow the block at its shrink-wrap width).
|
|
* In this case any new overflowing content must be
|
|
* prepended to the overflow lines.
|
|
*/
|
|
|
|
// see nsHTMLParts.h for the public block state bits
|
|
|
|
/**
|
|
* Something in the block has changed that requires Bidi resolution to be
|
|
* performed on the block. This flag must be either set on all blocks in a
|
|
* continuation chain or none of them.
|
|
*/
|
|
#define NS_BLOCK_NEEDS_BIDI_RESOLUTION NS_FRAME_STATE_BIT(20)
|
|
#define NS_BLOCK_HAS_PUSHED_FLOATS NS_FRAME_STATE_BIT(21)
|
|
#define NS_BLOCK_HAS_LINE_CURSOR NS_FRAME_STATE_BIT(24)
|
|
#define NS_BLOCK_HAS_OVERFLOW_LINES NS_FRAME_STATE_BIT(25)
|
|
#define NS_BLOCK_HAS_OVERFLOW_OUT_OF_FLOWS NS_FRAME_STATE_BIT(26)
|
|
|
|
// Set on any block that has descendant frames in the normal
|
|
// flow with 'clear' set to something other than 'none'
|
|
// (including <BR CLEAR="..."> frames)
|
|
#define NS_BLOCK_HAS_CLEAR_CHILDREN NS_FRAME_STATE_BIT(27)
|
|
|
|
// This block has had a child marked dirty, so before we reflow we need
|
|
// to look through the lines to find any such children and mark
|
|
// appropriate lines dirty.
|
|
#define NS_BLOCK_LOOK_FOR_DIRTY_FRAMES NS_FRAME_STATE_BIT(61)
|
|
|
|
// Are our cached intrinsic widths intrinsic widths for font size
|
|
// inflation? i.e., what was the current state of
|
|
// GetPresContext()->mInflationDisabledForShrinkWrap at the time they
|
|
// were computed?
|
|
// nsBlockFrame is the only thing that caches intrinsic widths that
|
|
// needs to track this because it's the only thing that caches intrinsic
|
|
// widths that lives inside of things (form controls) that do intrinsic
|
|
// sizing with font inflation enabled.
|
|
#define NS_BLOCK_FRAME_INTRINSICS_INFLATED NS_FRAME_STATE_BIT(62)
|
|
|
|
#define nsBlockFrameSuper nsContainerFrame
|
|
|
|
/*
|
|
* Base class for block and inline frames.
|
|
* The block frame has an additional child list, kAbsoluteList, which
|
|
* contains the absolutely positioned frames.
|
|
*/
|
|
class nsBlockFrame : public nsBlockFrameSuper
|
|
{
|
|
public:
|
|
NS_DECL_QUERYFRAME_TARGET(nsBlockFrame)
|
|
NS_DECL_FRAMEARENA_HELPERS
|
|
|
|
typedef nsLineList::iterator line_iterator;
|
|
typedef nsLineList::const_iterator const_line_iterator;
|
|
typedef nsLineList::reverse_iterator reverse_line_iterator;
|
|
typedef nsLineList::const_reverse_iterator const_reverse_line_iterator;
|
|
|
|
line_iterator begin_lines() { return mLines.begin(); }
|
|
line_iterator end_lines() { return mLines.end(); }
|
|
const_line_iterator begin_lines() const { return mLines.begin(); }
|
|
const_line_iterator end_lines() const { return mLines.end(); }
|
|
reverse_line_iterator rbegin_lines() { return mLines.rbegin(); }
|
|
reverse_line_iterator rend_lines() { return mLines.rend(); }
|
|
const_reverse_line_iterator rbegin_lines() const { return mLines.rbegin(); }
|
|
const_reverse_line_iterator rend_lines() const { return mLines.rend(); }
|
|
line_iterator line(nsLineBox* aList) { return mLines.begin(aList); }
|
|
reverse_line_iterator rline(nsLineBox* aList) { return mLines.rbegin(aList); }
|
|
|
|
friend nsIFrame* NS_NewBlockFrame(nsIPresShell* aPresShell, nsStyleContext* aContext, uint32_t aFlags);
|
|
|
|
// nsQueryFrame
|
|
NS_DECL_QUERYFRAME
|
|
|
|
// nsIFrame
|
|
virtual void Init(nsIContent* aContent,
|
|
nsIFrame* aParent,
|
|
nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
|
|
NS_IMETHOD SetInitialChildList(ChildListID aListID,
|
|
nsFrameList& aChildList);
|
|
NS_IMETHOD AppendFrames(ChildListID aListID,
|
|
nsFrameList& aFrameList);
|
|
NS_IMETHOD InsertFrames(ChildListID aListID,
|
|
nsIFrame* aPrevFrame,
|
|
nsFrameList& aFrameList);
|
|
NS_IMETHOD RemoveFrame(ChildListID aListID,
|
|
nsIFrame* aOldFrame);
|
|
virtual const nsFrameList& GetChildList(ChildListID aListID) const;
|
|
virtual void GetChildLists(nsTArray<ChildList>* aLists) const;
|
|
virtual nscoord GetBaseline() const MOZ_OVERRIDE;
|
|
virtual nscoord GetCaretBaseline() const MOZ_OVERRIDE;
|
|
virtual void DestroyFrom(nsIFrame* aDestructRoot);
|
|
virtual nsSplittableType GetSplittableType() const;
|
|
virtual bool IsFloatContainingBlock() const;
|
|
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
|
|
const nsRect& aDirtyRect,
|
|
const nsDisplayListSet& aLists) MOZ_OVERRIDE;
|
|
virtual nsIAtom* GetType() const;
|
|
virtual bool IsFrameOfType(uint32_t aFlags) const
|
|
{
|
|
return nsContainerFrame::IsFrameOfType(aFlags &
|
|
~(nsIFrame::eCanContainOverflowContainers |
|
|
nsIFrame::eBlockFrame));
|
|
}
|
|
|
|
virtual void InvalidateFrame(uint32_t aDisplayItemKey = 0);
|
|
virtual void InvalidateFrameWithRect(const nsRect& aRect, uint32_t aDisplayItemKey = 0);
|
|
|
|
#ifdef DEBUG
|
|
void List(FILE* out, int32_t aIndent, uint32_t aFlags = 0) const;
|
|
NS_IMETHOD_(nsFrameState) GetDebugStateBits() const;
|
|
NS_IMETHOD GetFrameName(nsAString& aResult) const;
|
|
#endif
|
|
|
|
#ifdef ACCESSIBILITY
|
|
virtual mozilla::a11y::AccType AccessibleType() MOZ_OVERRIDE;
|
|
#endif
|
|
|
|
// line cursor methods to speed up searching for the line(s)
|
|
// containing a point. The basic idea is that we set the cursor
|
|
// property if the lines' overflowArea.VisualOverflow().ys and
|
|
// overflowArea.VisualOverflow().yMosts are non-decreasing
|
|
// (considering only non-empty overflowArea.VisualOverflow()s; empty
|
|
// overflowArea.VisualOverflow()s never participate in event handling
|
|
// or painting), and the block has sufficient number of lines. The
|
|
// cursor property points to a "recently used" line. If we get a
|
|
// series of requests that work on lines
|
|
// "near" the cursor, then we can find those nearby lines quickly by
|
|
// starting our search at the cursor.
|
|
|
|
// Clear out line cursor because we're disturbing the lines (i.e., Reflow)
|
|
void ClearLineCursor();
|
|
// Get the first line that might contain y-coord 'y', or nullptr if you must search
|
|
// all lines. If nonnull is returned then we guarantee that the lines'
|
|
// combinedArea.ys and combinedArea.yMosts are non-decreasing.
|
|
// The actual line returned might not contain 'y', but if not, it is guaranteed
|
|
// to be before any line which does contain 'y'.
|
|
nsLineBox* GetFirstLineContaining(nscoord y);
|
|
// Set the line cursor to our first line. Only call this if you
|
|
// guarantee that the lines' combinedArea.ys and combinedArea.yMosts
|
|
// are non-decreasing.
|
|
void SetupLineCursor();
|
|
|
|
virtual void ChildIsDirty(nsIFrame* aChild);
|
|
virtual bool IsVisibleInSelection(nsISelection* aSelection);
|
|
|
|
virtual bool IsEmpty();
|
|
virtual bool CachedIsEmpty();
|
|
virtual bool IsSelfEmpty();
|
|
|
|
// Given that we have a bullet, does it actually draw something, i.e.,
|
|
// do we have either a 'list-style-type' or 'list-style-image' that is
|
|
// not 'none'?
|
|
bool BulletIsEmpty() const;
|
|
|
|
/**
|
|
* Return the bullet text equivalent.
|
|
*/
|
|
void GetBulletText(nsAString& aText) const;
|
|
|
|
/**
|
|
* Return true if there's a bullet.
|
|
*/
|
|
bool HasBullet() const {
|
|
return HasOutsideBullet() || HasInsideBullet();
|
|
}
|
|
|
|
/**
|
|
* @return true if this frame has an inside bullet frame.
|
|
*/
|
|
bool HasInsideBullet() const {
|
|
return 0 != (mState & NS_BLOCK_FRAME_HAS_INSIDE_BULLET);
|
|
}
|
|
|
|
/**
|
|
* @return true if this frame has an outside bullet frame.
|
|
*/
|
|
bool HasOutsideBullet() const {
|
|
return 0 != (mState & NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET);
|
|
}
|
|
|
|
/**
|
|
* @return the bullet frame or nullptr if we don't have one.
|
|
*/
|
|
nsBulletFrame* GetBullet() const {
|
|
nsBulletFrame* outside = GetOutsideBullet();
|
|
return outside ? outside : GetInsideBullet();
|
|
}
|
|
|
|
virtual void MarkIntrinsicWidthsDirty();
|
|
private:
|
|
void CheckIntrinsicCacheAgainstShrinkWrapState();
|
|
public:
|
|
virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext);
|
|
virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext);
|
|
|
|
virtual nsRect ComputeTightBounds(gfxContext* aContext) const;
|
|
|
|
NS_IMETHOD Reflow(nsPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aDesiredSize,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus);
|
|
|
|
NS_IMETHOD AttributeChanged(int32_t aNameSpaceID,
|
|
nsIAtom* aAttribute,
|
|
int32_t aModType);
|
|
|
|
/**
|
|
* Move any frames on our overflow list to the end of our principal list.
|
|
* @return true if there were any overflow frames
|
|
*/
|
|
virtual bool DrainSelfOverflowList();
|
|
|
|
virtual nsresult StealFrame(nsPresContext* aPresContext,
|
|
nsIFrame* aChild,
|
|
bool aForceNormal = false);
|
|
|
|
virtual void DeleteNextInFlowChild(nsPresContext* aPresContext,
|
|
nsIFrame* aNextInFlow,
|
|
bool aDeletingEmptyFrames);
|
|
|
|
/**
|
|
* Determines whether the collapsed margin carried out of the last
|
|
* line includes the margin-top of a line with clearance (in which
|
|
* case we must avoid collapsing that margin with our bottom margin)
|
|
*/
|
|
bool CheckForCollapsedBottomMarginFromClearanceLine();
|
|
|
|
static nsresult GetCurrentLine(nsBlockReflowState *aState, nsLineBox **aOutCurrentLine);
|
|
|
|
/**
|
|
* Determine if this block is a margin root at the top/bottom edges.
|
|
*/
|
|
void IsMarginRoot(bool* aTopMarginRoot, bool* aBottomMarginRoot);
|
|
|
|
static bool BlockNeedsFloatManager(nsIFrame* aBlock);
|
|
|
|
/**
|
|
* Returns whether aFrame is a block frame that will wrap its contents
|
|
* around floats intruding on it from the outside. (aFrame need not
|
|
* be a block frame, but if it's not, the result will be false.)
|
|
*/
|
|
static bool BlockCanIntersectFloats(nsIFrame* aFrame);
|
|
|
|
/**
|
|
* Returns the width that needs to be cleared past floats for blocks
|
|
* that cannot intersect floats. aState must already have
|
|
* GetAvailableSpace called on it for the vertical position that we
|
|
* care about (which need not be its current mY)
|
|
*/
|
|
struct ReplacedElementWidthToClear {
|
|
nscoord marginLeft, borderBoxWidth, marginRight;
|
|
nscoord MarginBoxWidth() const
|
|
{ return marginLeft + borderBoxWidth + marginRight; }
|
|
};
|
|
static ReplacedElementWidthToClear
|
|
WidthToClearPastFloats(nsBlockReflowState& aState,
|
|
const nsRect& aFloatAvailableSpace,
|
|
nsIFrame* aFrame);
|
|
|
|
/**
|
|
* Creates a contination for aFloat and adds it to the list of overflow floats.
|
|
* Also updates aState.mReflowStatus to include the float's incompleteness.
|
|
* Must only be called while this block frame is in reflow.
|
|
* aFloatStatus must be the float's true, unmodified reflow status.
|
|
*
|
|
*/
|
|
nsresult SplitFloat(nsBlockReflowState& aState,
|
|
nsIFrame* aFloat,
|
|
nsReflowStatus aFloatStatus);
|
|
|
|
/**
|
|
* Walks up the frame tree, starting with aCandidate, and returns the first
|
|
* block frame that it encounters.
|
|
*/
|
|
static nsBlockFrame* GetNearestAncestorBlock(nsIFrame* aCandidate);
|
|
|
|
struct FrameLines {
|
|
nsLineList mLines;
|
|
nsFrameList mFrames;
|
|
};
|
|
|
|
protected:
|
|
nsBlockFrame(nsStyleContext* aContext)
|
|
: nsContainerFrame(aContext)
|
|
, mMinWidth(NS_INTRINSIC_WIDTH_UNKNOWN)
|
|
, mPrefWidth(NS_INTRINSIC_WIDTH_UNKNOWN)
|
|
{
|
|
#ifdef DEBUG
|
|
InitDebugFlags();
|
|
#endif
|
|
}
|
|
virtual ~nsBlockFrame();
|
|
|
|
#ifdef DEBUG
|
|
#ifdef _IMPL_NS_LAYOUT
|
|
already_AddRefed<nsStyleContext> GetFirstLetterStyle(nsPresContext* aPresContext)
|
|
{
|
|
return aPresContext->StyleSet()->
|
|
ProbePseudoElementStyle(mContent->AsElement(),
|
|
nsCSSPseudoElements::ePseudo_firstLetter,
|
|
mStyleContext);
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
NS_DECLARE_FRAME_PROPERTY(LineCursorProperty, nullptr)
|
|
nsLineBox* GetLineCursor() {
|
|
return (GetStateBits() & NS_BLOCK_HAS_LINE_CURSOR) ?
|
|
static_cast<nsLineBox*>(Properties().Get(LineCursorProperty())) : nullptr;
|
|
}
|
|
|
|
nsLineBox* NewLineBox(nsIFrame* aFrame, bool aIsBlock) {
|
|
return NS_NewLineBox(PresContext()->PresShell(), aFrame, aIsBlock);
|
|
}
|
|
nsLineBox* NewLineBox(nsLineBox* aFromLine, nsIFrame* aFrame, int32_t aCount) {
|
|
return NS_NewLineBox(PresContext()->PresShell(), aFromLine, aFrame, aCount);
|
|
}
|
|
void FreeLineBox(nsLineBox* aLine) {
|
|
if (aLine == GetLineCursor()) {
|
|
ClearLineCursor();
|
|
}
|
|
aLine->Destroy(PresContext()->PresShell());
|
|
}
|
|
/**
|
|
* Helper method for StealFrame.
|
|
*/
|
|
void RemoveFrameFromLine(nsIFrame* aChild, nsLineList::iterator aLine,
|
|
nsFrameList& aFrameList, nsLineList& aLineList);
|
|
|
|
void TryAllLines(nsLineList::iterator* aIterator,
|
|
nsLineList::iterator* aStartIterator,
|
|
nsLineList::iterator* aEndIterator,
|
|
bool* aInOverflowLines,
|
|
FrameLines** aOverflowLines);
|
|
|
|
void SetFlags(nsFrameState aFlags) {
|
|
mState &= ~NS_BLOCK_FLAGS_MASK;
|
|
mState |= aFlags;
|
|
}
|
|
|
|
/** move the frames contained by aLine by aDY
|
|
* if aLine is a block, its child floats are added to the state manager
|
|
*/
|
|
void SlideLine(nsBlockReflowState& aState,
|
|
nsLineBox* aLine, nscoord aDY);
|
|
|
|
virtual int GetSkipSides() const MOZ_OVERRIDE;
|
|
|
|
void ComputeFinalSize(const nsHTMLReflowState& aReflowState,
|
|
nsBlockReflowState& aState,
|
|
nsHTMLReflowMetrics& aMetrics,
|
|
nscoord* aBottomEdgeOfChildren);
|
|
|
|
void ComputeOverflowAreas(const nsRect& aBounds,
|
|
const nsStyleDisplay* aDisplay,
|
|
nscoord aBottomEdgeOfChildren,
|
|
nsOverflowAreas& aOverflowAreas);
|
|
|
|
/**
|
|
* Add the frames in aFrameList to this block after aPrevSibling.
|
|
* This block thinks in terms of lines, but the frame construction code
|
|
* knows nothing about lines at all so we need to find the line that
|
|
* contains aPrevSibling and add aFrameList after aPrevSibling on that line.
|
|
* New lines are created as necessary to handle block data in aFrameList.
|
|
* This function will clear aFrameList.
|
|
*/
|
|
void AddFrames(nsFrameList& aFrameList, nsIFrame* aPrevSibling);
|
|
|
|
#ifdef IBMBIDI
|
|
/**
|
|
* Perform Bidi resolution on this frame
|
|
*/
|
|
nsresult ResolveBidi();
|
|
|
|
/**
|
|
* Test whether the frame is a form control in a visual Bidi page.
|
|
* This is necessary for backwards-compatibility, because most visual
|
|
* pages use logical order for form controls so that they will
|
|
* display correctly on native widgets in OSs with Bidi support
|
|
* @param aPresContext the pres context
|
|
* @return whether the frame is a BIDI form control
|
|
*/
|
|
bool IsVisualFormControl(nsPresContext* aPresContext);
|
|
#endif
|
|
|
|
public:
|
|
/**
|
|
* Does all the real work for removing aDeletedFrame
|
|
* -- finds the line containing aDeletedFrame
|
|
* -- removes all aDeletedFrame next-in-flows (or all continuations,
|
|
* if REMOVE_FIXED_CONTINUATIONS is given)
|
|
* -- marks lines dirty as needed
|
|
* -- marks textruns dirty (unless FRAMES_ARE_EMPTY is given, in which
|
|
* case textruns do not need to be dirtied)
|
|
* -- destroys all removed frames
|
|
*/
|
|
enum {
|
|
REMOVE_FIXED_CONTINUATIONS = 0x02,
|
|
FRAMES_ARE_EMPTY = 0x04
|
|
};
|
|
nsresult DoRemoveFrame(nsIFrame* aDeletedFrame, uint32_t aFlags);
|
|
|
|
void ReparentFloats(nsIFrame* aFirstFrame, nsBlockFrame* aOldParent,
|
|
bool aReparentSiblings);
|
|
|
|
virtual bool UpdateOverflow();
|
|
|
|
/** Load all of aFrame's floats into the float manager iff aFrame is not a
|
|
* block formatting context. Handles all necessary float manager translations;
|
|
* assumes float manager is in aFrame's parent's coord system.
|
|
* Safe to call on non-blocks (does nothing).
|
|
*/
|
|
static void RecoverFloatsFor(nsIFrame* aFrame,
|
|
nsFloatManager& aFloatManager);
|
|
|
|
/**
|
|
* Determine if we have any pushed floats from a previous continuation.
|
|
*
|
|
* @returns true, if any of the floats at the beginning of our mFloats list
|
|
* have the NS_FRAME_IS_PUSHED_FLOAT bit set; false otherwise.
|
|
*/
|
|
bool HasPushedFloatsFromPrevContinuation() const {
|
|
if (!mFloats.IsEmpty()) {
|
|
// If we have pushed floats, then they should be at the beginning of our
|
|
// float list.
|
|
if (mFloats.FirstChild()->GetStateBits() & NS_FRAME_IS_PUSHED_FLOAT) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
// Double-check the above assertion that pushed floats should be at the
|
|
// beginning of our floats list.
|
|
for (nsFrameList::Enumerator e(mFloats); !e.AtEnd(); e.Next()) {
|
|
nsIFrame* f = e.get();
|
|
NS_ASSERTION(!(f->GetStateBits() & NS_FRAME_IS_PUSHED_FLOAT),
|
|
"pushed floats must be at the beginning of the float list");
|
|
}
|
|
#endif
|
|
return false;
|
|
}
|
|
|
|
protected:
|
|
|
|
/** grab overflow lines from this block's prevInFlow, and make them
|
|
* part of this block's mLines list.
|
|
* @return true if any lines were drained.
|
|
*/
|
|
bool DrainOverflowLines();
|
|
|
|
/**
|
|
* @return false iff this block does not have a float on any child list.
|
|
* This function is O(1).
|
|
*/
|
|
bool MaybeHasFloats() const {
|
|
if (!mFloats.IsEmpty()) {
|
|
return true;
|
|
}
|
|
// XXX this could be replaced with HasPushedFloats() if we enforced
|
|
// removing the property when the frame list becomes empty.
|
|
nsFrameList* list = GetPushedFloats();
|
|
if (list && !list->IsEmpty()) {
|
|
return true;
|
|
}
|
|
// For the OverflowOutOfFlowsProperty I think we do enforce that, but it's
|
|
// a mix of out-of-flow frames, so that's why the method name has "Maybe".
|
|
return GetStateBits() & NS_BLOCK_HAS_OVERFLOW_OUT_OF_FLOWS;
|
|
}
|
|
|
|
/** grab pushed floats from this block's prevInFlow, and splice
|
|
* them into this block's mFloats list.
|
|
*/
|
|
void DrainPushedFloats(nsBlockReflowState& aState);
|
|
|
|
/** Load all our floats into the float manager (without reflowing them).
|
|
* Assumes float manager is in our own coordinate system.
|
|
*/
|
|
void RecoverFloats(nsFloatManager& aFloatManager);
|
|
|
|
/** Reflow pushed floats
|
|
*/
|
|
void ReflowPushedFloats(nsBlockReflowState& aState,
|
|
nsOverflowAreas& aOverflowAreas,
|
|
nsReflowStatus& aStatus);
|
|
|
|
/** Find any trailing BR clear from the last line of the block (or its PIFs)
|
|
*/
|
|
uint8_t FindTrailingClear();
|
|
|
|
/**
|
|
* Remove a float from our float list.
|
|
*/
|
|
void RemoveFloat(nsIFrame* aFloat);
|
|
/**
|
|
* Remove a float from the float cache for the line its placeholder is on.
|
|
*/
|
|
void RemoveFloatFromFloatCache(nsIFrame* aFloat);
|
|
|
|
void CollectFloats(nsIFrame* aFrame, nsFrameList& aList,
|
|
bool aCollectFromSiblings) {
|
|
if (MaybeHasFloats()) {
|
|
DoCollectFloats(aFrame, aList, aCollectFromSiblings);
|
|
}
|
|
}
|
|
void DoCollectFloats(nsIFrame* aFrame, nsFrameList& aList,
|
|
bool aCollectFromSiblings);
|
|
|
|
// Remove a float, abs, rel positioned frame from the appropriate block's list
|
|
static void DoRemoveOutOfFlowFrame(nsIFrame* aFrame);
|
|
|
|
/** set up the conditions necessary for an resize reflow
|
|
* the primary task is to mark the minimumly sufficient lines dirty.
|
|
*/
|
|
void PrepareResizeReflow(nsBlockReflowState& aState);
|
|
|
|
/** reflow all lines that have been marked dirty */
|
|
nsresult ReflowDirtyLines(nsBlockReflowState& aState);
|
|
|
|
/** Mark a given line dirty due to reflow being interrupted on or before it */
|
|
void MarkLineDirtyForInterrupt(nsLineBox* aLine);
|
|
|
|
//----------------------------------------
|
|
// Methods for line reflow
|
|
/**
|
|
* Reflow a line.
|
|
* @param aState the current reflow state
|
|
* @param aLine the line to reflow. can contain a single block frame
|
|
* or contain 1 or more inline frames.
|
|
* @param aKeepReflowGoing [OUT] indicates whether the caller should continue to reflow more lines
|
|
*/
|
|
nsresult ReflowLine(nsBlockReflowState& aState,
|
|
line_iterator aLine,
|
|
bool* aKeepReflowGoing);
|
|
|
|
// Return false if it needs another reflow because of reduced space
|
|
// between floats that are next to it (but not next to its top), and
|
|
// return true otherwise.
|
|
bool PlaceLine(nsBlockReflowState& aState,
|
|
nsLineLayout& aLineLayout,
|
|
line_iterator aLine,
|
|
nsFloatManager::SavedState* aFloatStateBeforeLine,
|
|
nsRect& aFloatAvailableSpace, /* in-out */
|
|
nscoord& aAvailableSpaceHeight, /* in-out */
|
|
bool* aKeepReflowGoing);
|
|
|
|
/**
|
|
* If NS_BLOCK_LOOK_FOR_DIRTY_FRAMES is set, call MarkLineDirty
|
|
* on any line with a child frame that is dirty.
|
|
*/
|
|
void LazyMarkLinesDirty();
|
|
|
|
/**
|
|
* Mark |aLine| dirty, and, if necessary because of possible
|
|
* pull-up, mark the previous line dirty as well. Also invalidates textruns
|
|
* on those lines because the text in the lines might have changed due to
|
|
* addition/removal of frames.
|
|
* @param aLine the line to mark dirty
|
|
* @param aLineList the line list containing that line
|
|
*/
|
|
void MarkLineDirty(line_iterator aLine, const nsLineList* aLineList);
|
|
|
|
// XXX where to go
|
|
bool IsLastLine(nsBlockReflowState& aState,
|
|
line_iterator aLine);
|
|
|
|
void DeleteLine(nsBlockReflowState& aState,
|
|
nsLineList::iterator aLine,
|
|
nsLineList::iterator aLineEnd);
|
|
|
|
//----------------------------------------
|
|
// Methods for individual frame reflow
|
|
|
|
bool ShouldApplyTopMargin(nsBlockReflowState& aState,
|
|
nsLineBox* aLine);
|
|
|
|
nsresult ReflowBlockFrame(nsBlockReflowState& aState,
|
|
line_iterator aLine,
|
|
bool* aKeepGoing);
|
|
|
|
nsresult ReflowInlineFrames(nsBlockReflowState& aState,
|
|
line_iterator aLine,
|
|
bool* aKeepLineGoing);
|
|
|
|
nsresult DoReflowInlineFrames(nsBlockReflowState& aState,
|
|
nsLineLayout& aLineLayout,
|
|
line_iterator aLine,
|
|
nsFlowAreaRect& aFloatAvailableSpace,
|
|
nscoord& aAvailableSpaceHeight,
|
|
nsFloatManager::SavedState*
|
|
aFloatStateBeforeLine,
|
|
bool* aKeepReflowGoing,
|
|
LineReflowStatus* aLineReflowStatus,
|
|
bool aAllowPullUp);
|
|
|
|
nsresult ReflowInlineFrame(nsBlockReflowState& aState,
|
|
nsLineLayout& aLineLayout,
|
|
line_iterator aLine,
|
|
nsIFrame* aFrame,
|
|
LineReflowStatus* aLineReflowStatus);
|
|
|
|
// Compute the available width for a float.
|
|
nsRect AdjustFloatAvailableSpace(nsBlockReflowState& aState,
|
|
const nsRect& aFloatAvailableSpace,
|
|
nsIFrame* aFloatFrame);
|
|
// Computes the border-box width of the float
|
|
nscoord ComputeFloatWidth(nsBlockReflowState& aState,
|
|
const nsRect& aFloatAvailableSpace,
|
|
nsIFrame* aFloat);
|
|
// An incomplete aReflowStatus indicates the float should be split
|
|
// but only if the available height is constrained.
|
|
// aAdjustedAvailableSpace is the result of calling
|
|
// nsBlockFrame::AdjustFloatAvailableSpace.
|
|
nsresult ReflowFloat(nsBlockReflowState& aState,
|
|
const nsRect& aAdjustedAvailableSpace,
|
|
nsIFrame* aFloat,
|
|
nsMargin& aFloatMargin,
|
|
// Whether the float's position
|
|
// (aAdjustedAvailableSpace) has been pushed down
|
|
// due to the presence of other floats.
|
|
bool aFloatPushedDown,
|
|
nsReflowStatus& aReflowStatus);
|
|
|
|
//----------------------------------------
|
|
// Methods for pushing/pulling lines/frames
|
|
|
|
/**
|
|
* Create a next-in-flow, if necessary, for aFrame. If a new frame is
|
|
* created, place it in aLine if aLine is not null.
|
|
* @param aState the block reflow state
|
|
* @param aLine where to put a new frame
|
|
* @param aFrame the frame
|
|
* @return true if a new frame was created, false if not
|
|
*/
|
|
bool CreateContinuationFor(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
nsIFrame* aFrame);
|
|
|
|
/**
|
|
* Push aLine (and any after it), since it cannot be placed on this
|
|
* page/column. Set aKeepReflowGoing to false and set
|
|
* flag aState.mReflowStatus as incomplete.
|
|
*/
|
|
void PushTruncatedLine(nsBlockReflowState& aState,
|
|
line_iterator aLine,
|
|
bool* aKeepReflowGoing);
|
|
|
|
void SplitLine(nsBlockReflowState& aState,
|
|
nsLineLayout& aLineLayout,
|
|
line_iterator aLine,
|
|
nsIFrame* aFrame,
|
|
LineReflowStatus* aLineReflowStatus);
|
|
|
|
/**
|
|
* Pull a frame from the next available location (one of our lines or
|
|
* one of our next-in-flows lines).
|
|
* @return the pulled frame or nullptr
|
|
*/
|
|
nsIFrame* PullFrame(nsBlockReflowState& aState,
|
|
line_iterator aLine);
|
|
|
|
/**
|
|
* Try to pull a frame out of a line pointed at by aFromLine.
|
|
*
|
|
* Note: pulling a frame from a line that is a place-holder frame
|
|
* doesn't automatically remove the corresponding float from the
|
|
* line's float array. This happens indirectly: either the line gets
|
|
* emptied (and destroyed) or the line gets reflowed (because we mark
|
|
* it dirty) and the code at the top of ReflowLine empties the
|
|
* array. So eventually, it will be removed, just not right away.
|
|
*
|
|
* @return the pulled frame or nullptr
|
|
*/
|
|
nsIFrame* PullFrameFrom(nsLineBox* aLine,
|
|
nsBlockFrame* aFromContainer,
|
|
nsLineList::iterator aFromLine);
|
|
|
|
/**
|
|
* Push the line after aLineBefore to the overflow line list.
|
|
* @param aLineBefore a line in 'mLines' (or begin_lines() when
|
|
* pushing the first line)
|
|
*/
|
|
void PushLines(nsBlockReflowState& aState,
|
|
nsLineList::iterator aLineBefore);
|
|
|
|
void PropagateFloatDamage(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
nscoord aDeltaY);
|
|
|
|
void CheckFloats(nsBlockReflowState& aState);
|
|
|
|
//----------------------------------------
|
|
// List handling kludge
|
|
|
|
// If this returns true, the block it's called on should get the
|
|
// NS_FRAME_HAS_DIRTY_CHILDREN bit set on it by the caller; either directly
|
|
// if it's already in reflow, or via calling FrameNeedsReflow() to schedule a
|
|
// reflow.
|
|
bool RenumberLists(nsPresContext* aPresContext);
|
|
|
|
static bool RenumberListsInBlock(nsPresContext* aPresContext,
|
|
nsBlockFrame* aBlockFrame,
|
|
int32_t* aOrdinal,
|
|
int32_t aDepth,
|
|
int32_t aIncrement);
|
|
|
|
static bool RenumberListsFor(nsPresContext* aPresContext, nsIFrame* aKid,
|
|
int32_t* aOrdinal, int32_t aDepth,
|
|
int32_t aIncrement);
|
|
|
|
static bool FrameStartsCounterScope(nsIFrame* aFrame);
|
|
|
|
void ReflowBullet(nsIFrame* aBulletFrame,
|
|
nsBlockReflowState& aState,
|
|
nsHTMLReflowMetrics& aMetrics,
|
|
nscoord aLineTop);
|
|
|
|
//----------------------------------------
|
|
|
|
virtual nsILineIterator* GetLineIterator();
|
|
|
|
public:
|
|
bool HasOverflowLines() const {
|
|
return 0 != (GetStateBits() & NS_BLOCK_HAS_OVERFLOW_LINES);
|
|
}
|
|
FrameLines* GetOverflowLines() const;
|
|
protected:
|
|
FrameLines* RemoveOverflowLines();
|
|
void SetOverflowLines(FrameLines* aOverflowLines);
|
|
void DestroyOverflowLines();
|
|
|
|
// Determine the computed height that's in effect for this block
|
|
// frame (that is, our computed height minus the heights of our
|
|
// previous in-flows).
|
|
// XXXbz this clearly makes laying out a block with N in-flows
|
|
// O(N^2)! Good thing the constant is tiny.
|
|
nscoord GetEffectiveComputedHeight(const nsHTMLReflowState& aReflowState) const;
|
|
|
|
/**
|
|
* This class is useful for efficiently modifying the out of flow
|
|
* overflow list. It gives the client direct writable access to
|
|
* the frame list temporarily but ensures that property is only
|
|
* written back if absolutely necessary.
|
|
*/
|
|
struct nsAutoOOFFrameList {
|
|
nsFrameList mList;
|
|
|
|
nsAutoOOFFrameList(nsBlockFrame* aBlock)
|
|
: mPropValue(aBlock->GetOverflowOutOfFlows())
|
|
, mBlock(aBlock) {
|
|
if (mPropValue) {
|
|
mList = *mPropValue;
|
|
}
|
|
}
|
|
~nsAutoOOFFrameList() {
|
|
mBlock->SetOverflowOutOfFlows(mList, mPropValue);
|
|
}
|
|
protected:
|
|
nsFrameList* const mPropValue;
|
|
nsBlockFrame* const mBlock;
|
|
};
|
|
friend struct nsAutoOOFFrameList;
|
|
|
|
nsFrameList* GetOverflowOutOfFlows() const;
|
|
void SetOverflowOutOfFlows(const nsFrameList& aList, nsFrameList* aPropValue);
|
|
|
|
/**
|
|
* @return the inside bullet frame or nullptr if we don't have one.
|
|
*/
|
|
nsBulletFrame* GetInsideBullet() const;
|
|
|
|
/**
|
|
* @return the outside bullet frame or nullptr if we don't have one.
|
|
*/
|
|
nsBulletFrame* GetOutsideBullet() const;
|
|
|
|
/**
|
|
* @return the outside bullet frame list frame property.
|
|
*/
|
|
nsFrameList* GetOutsideBulletList() const;
|
|
|
|
/**
|
|
* @return true if this frame has pushed floats.
|
|
*/
|
|
bool HasPushedFloats() const {
|
|
return 0 != (GetStateBits() & NS_BLOCK_HAS_PUSHED_FLOATS);
|
|
}
|
|
|
|
// Get the pushed floats list, which is used for *temporary* storage
|
|
// of floats during reflow, between when we decide they don't fit in
|
|
// this block until our next continuation takes them.
|
|
nsFrameList* GetPushedFloats() const;
|
|
// Get the pushed floats list, or if there is not currently one,
|
|
// make a new empty one.
|
|
nsFrameList* EnsurePushedFloats();
|
|
// Remove and return the pushed floats list.
|
|
nsFrameList* RemovePushedFloats();
|
|
|
|
#ifdef DEBUG
|
|
void VerifyLines(bool aFinalCheckOK);
|
|
void VerifyOverflowSituation();
|
|
int32_t GetDepth() const;
|
|
#endif
|
|
|
|
nscoord mMinWidth, mPrefWidth;
|
|
|
|
nsLineList mLines;
|
|
|
|
// List of all floats in this block
|
|
// XXXmats blocks rarely have floats, make it a frame property
|
|
nsFrameList mFloats;
|
|
|
|
friend class nsBlockReflowState;
|
|
friend class nsBlockInFlowLineIterator;
|
|
|
|
#ifdef DEBUG
|
|
public:
|
|
static bool gLamePaintMetrics;
|
|
static bool gLameReflowMetrics;
|
|
static bool gNoisy;
|
|
static bool gNoisyDamageRepair;
|
|
static bool gNoisyIntrinsic;
|
|
static bool gNoisyReflow;
|
|
static bool gReallyNoisyReflow;
|
|
static bool gNoisyFloatManager;
|
|
static bool gVerifyLines;
|
|
static bool gDisableResizeOpt;
|
|
|
|
static int32_t gNoiseIndent;
|
|
|
|
static const char* kReflowCommandType[];
|
|
|
|
protected:
|
|
static void InitDebugFlags();
|
|
#endif
|
|
};
|
|
|
|
#ifdef DEBUG
|
|
class AutoNoisyIndenter {
|
|
public:
|
|
AutoNoisyIndenter(bool aDoIndent) : mIndented(aDoIndent) {
|
|
if (mIndented) {
|
|
nsBlockFrame::gNoiseIndent++;
|
|
}
|
|
}
|
|
~AutoNoisyIndenter() {
|
|
if (mIndented) {
|
|
nsBlockFrame::gNoiseIndent--;
|
|
}
|
|
}
|
|
private:
|
|
bool mIndented;
|
|
};
|
|
#endif
|
|
|
|
/**
|
|
* Iterates over all lines in the prev-in-flows/next-in-flows of this block.
|
|
*/
|
|
class nsBlockInFlowLineIterator {
|
|
public:
|
|
typedef nsBlockFrame::line_iterator line_iterator;
|
|
/**
|
|
* Set up the iterator to point to aLine which must be a normal line
|
|
* in aFrame (not an overflow line).
|
|
*/
|
|
nsBlockInFlowLineIterator(nsBlockFrame* aFrame, line_iterator aLine);
|
|
/**
|
|
* Set up the iterator to point to the first line found starting from
|
|
* aFrame. Sets aFoundValidLine to false if there is no such line.
|
|
* After aFoundValidLine has returned false, don't call any methods on this
|
|
* object again.
|
|
*/
|
|
nsBlockInFlowLineIterator(nsBlockFrame* aFrame, bool* aFoundValidLine);
|
|
/**
|
|
* Set up the iterator to point to the line that contains aFindFrame (either
|
|
* directly or indirectly). If aFrame is out of flow, or contained in an
|
|
* out-of-flow, finds the line containing the out-of-flow's placeholder. If
|
|
* the frame is not found, sets aFoundValidLine to false. After
|
|
* aFoundValidLine has returned false, don't call any methods on this
|
|
* object again.
|
|
*/
|
|
nsBlockInFlowLineIterator(nsBlockFrame* aFrame, nsIFrame* aFindFrame,
|
|
bool* aFoundValidLine);
|
|
|
|
line_iterator GetLine() { return mLine; }
|
|
bool IsLastLineInList();
|
|
nsBlockFrame* GetContainer() { return mFrame; }
|
|
bool GetInOverflow() { return mLineList != &mFrame->mLines; }
|
|
|
|
/**
|
|
* Returns the current line list we're iterating, null means
|
|
* we're iterating |mLines| of the container.
|
|
*/
|
|
nsLineList* GetLineList() { return mLineList; }
|
|
|
|
/**
|
|
* Returns the end-iterator of whatever line list we're in.
|
|
*/
|
|
line_iterator End();
|
|
|
|
/**
|
|
* Returns false if there are no more lines. After this has returned false,
|
|
* don't call any methods on this object again.
|
|
*/
|
|
bool Next();
|
|
/**
|
|
* Returns false if there are no more lines. After this has returned false,
|
|
* don't call any methods on this object again.
|
|
*/
|
|
bool Prev();
|
|
|
|
private:
|
|
friend class nsBlockFrame;
|
|
// XXX nsBlockFrame uses this internally in one place. Try to remove it.
|
|
nsBlockInFlowLineIterator(nsBlockFrame* aFrame, line_iterator aLine, bool aInOverflow);
|
|
|
|
nsBlockFrame* mFrame;
|
|
line_iterator mLine;
|
|
nsLineList* mLineList; // the line list mLine is in
|
|
|
|
/**
|
|
* Moves iterator to next valid line reachable from the current block.
|
|
* Returns false if there are no valid lines.
|
|
*/
|
|
bool FindValidLine();
|
|
};
|
|
|
|
#endif /* nsBlockFrame_h___ */
|