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gecko-dev/layout/generic/nsFrame.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Pierre Phaneuf <pp@ludusdesign.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/* base class of all rendering objects */
#ifndef nsFrame_h___
#define nsFrame_h___
#include "nsBox.h"
#include "nsRect.h"
#include "nsString.h"
#include "prlog.h"
#include "nsIPresShell.h"
#include "nsFrameSelection.h"
#include "nsHTMLReflowState.h"
#include "nsHTMLReflowMetrics.h"
#include "nsHTMLParts.h"
/**
* nsFrame logging constants. We redefine the nspr
* PRLogModuleInfo.level field to be a bitfield. Each bit controls a
* specific type of logging. Each logging operation has associated
* inline methods defined below.
*/
#define NS_FRAME_TRACE_CALLS 0x1
#define NS_FRAME_TRACE_PUSH_PULL 0x2
#define NS_FRAME_TRACE_CHILD_REFLOW 0x4
#define NS_FRAME_TRACE_NEW_FRAMES 0x8
#define NS_FRAME_LOG_TEST(_lm,_bit) (PRIntn((_lm)->level) & (_bit))
#ifdef NS_DEBUG
#define NS_FRAME_LOG(_bit,_args) \
PR_BEGIN_MACRO \
if (NS_FRAME_LOG_TEST(nsFrame::GetLogModuleInfo(),_bit)) { \
PR_LogPrint _args; \
} \
PR_END_MACRO
#else
#define NS_FRAME_LOG(_bit,_args)
#endif
// XXX Need to rework this so that logging is free when it's off
#ifdef NS_DEBUG
#define NS_FRAME_TRACE_IN(_method) Trace(_method, PR_TRUE)
#define NS_FRAME_TRACE_OUT(_method) Trace(_method, PR_FALSE)
// XXX remove me
#define NS_FRAME_TRACE_MSG(_bit,_args) \
PR_BEGIN_MACRO \
if (NS_FRAME_LOG_TEST(nsFrame::GetLogModuleInfo(),_bit)) { \
TraceMsg _args; \
} \
PR_END_MACRO
#define NS_FRAME_TRACE(_bit,_args) \
PR_BEGIN_MACRO \
if (NS_FRAME_LOG_TEST(nsFrame::GetLogModuleInfo(),_bit)) { \
TraceMsg _args; \
} \
PR_END_MACRO
#define NS_FRAME_TRACE_REFLOW_IN(_method) Trace(_method, PR_TRUE)
#define NS_FRAME_TRACE_REFLOW_OUT(_method, _status) \
Trace(_method, PR_FALSE, _status)
#else
#define NS_FRAME_TRACE(_bits,_args)
#define NS_FRAME_TRACE_IN(_method)
#define NS_FRAME_TRACE_OUT(_method)
#define NS_FRAME_TRACE_MSG(_bits,_args)
#define NS_FRAME_TRACE_REFLOW_IN(_method)
#define NS_FRAME_TRACE_REFLOW_OUT(_method, _status)
#endif
// Frame allocation boilerplate macros. Every subclass of nsFrame
// must define its own operator new and GetAllocatedSize. If they do
// not, the per-frame recycler lists in nsPresArena will not work
// correctly, with potentially catastrophic consequences (not enough
// memory is allocated for a frame object).
#define NS_DECL_FRAMEARENA_HELPERS \
NS_MUST_OVERRIDE void* operator new(size_t, nsIPresShell*); \
virtual NS_MUST_OVERRIDE nsQueryFrame::FrameIID GetFrameId();
#define NS_IMPL_FRAMEARENA_HELPERS(class) \
void* class::operator new(size_t sz, nsIPresShell* aShell) \
{ return aShell->AllocateFrame(nsQueryFrame::class##_id, sz); } \
nsQueryFrame::FrameIID class::GetFrameId() \
{ return nsQueryFrame::class##_id; }
//----------------------------------------------------------------------
struct nsBoxLayoutMetrics;
/**
* Implementation of a simple frame that's not splittable and has no
* child frames.
*
* Sets the NS_FRAME_SYNCHRONIZE_FRAME_AND_VIEW bit, so the default
* behavior is to keep the frame and view position and size in sync.
*/
class nsFrame : public nsBox
{
public:
/**
* Create a new "empty" frame that maps a given piece of content into a
* 0,0 area.
*/
friend nsIFrame* NS_NewEmptyFrame(nsIPresShell* aShell,
nsStyleContext* aContext);
private:
// Left undefined; nsFrame objects are never allocated from the heap.
void* operator new(size_t sz) CPP_THROW_NEW;
protected:
// Overridden to prevent the global delete from being called, since
// the memory came out of an arena instead of the heap.
//
// Ideally this would be private and undefined, like the normal
// operator new. Unfortunately, the C++ standard requires an
// overridden operator delete to be accessible to any subclass that
// defines a virtual destructor, so we can only make it protected;
// worse, some C++ compilers will synthesize calls to this function
// from the "deleting destructors" that they emit in case of
// delete-expressions, so it can't even be undefined.
void operator delete(void* aPtr, size_t sz);
public:
// nsQueryFrame
NS_DECL_QUERYFRAME
NS_DECL_FRAMEARENA_HELPERS
// nsIFrame
NS_IMETHOD Init(nsIContent* aContent,
nsIFrame* aParent,
nsIFrame* asPrevInFlow);
NS_IMETHOD SetInitialChildList(nsIAtom* aListName,
nsFrameList& aChildList);
NS_IMETHOD AppendFrames(nsIAtom* aListName,
nsFrameList& aFrameList);
NS_IMETHOD InsertFrames(nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsFrameList& aFrameList);
NS_IMETHOD RemoveFrame(nsIAtom* aListName,
nsIFrame* aOldFrame);
virtual void DestroyFrom(nsIFrame* aDestructRoot);
virtual nsStyleContext* GetAdditionalStyleContext(PRInt32 aIndex) const;
virtual void SetAdditionalStyleContext(PRInt32 aIndex,
nsStyleContext* aStyleContext);
virtual void SetParent(nsIFrame* aParent);
virtual nscoord GetBaseline() const;
virtual nsIAtom* GetAdditionalChildListName(PRInt32 aIndex) const;
virtual nsFrameList GetChildList(nsIAtom* aListName) const;
NS_IMETHOD HandleEvent(nsPresContext* aPresContext,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus);
NS_IMETHOD GetContentForEvent(nsPresContext* aPresContext,
nsEvent* aEvent,
nsIContent** aContent);
NS_IMETHOD GetCursor(const nsPoint& aPoint,
nsIFrame::Cursor& aCursor);
NS_IMETHOD GetPointFromOffset(PRInt32 inOffset,
nsPoint* outPoint);
NS_IMETHOD GetChildFrameContainingOffset(PRInt32 inContentOffset,
PRBool inHint,
PRInt32* outFrameContentOffset,
nsIFrame* *outChildFrame);
static nsresult GetNextPrevLineFromeBlockFrame(nsPresContext* aPresContext,
nsPeekOffsetStruct *aPos,
nsIFrame *aBlockFrame,
PRInt32 aLineStart,
PRInt8 aOutSideLimit
);
NS_IMETHOD CharacterDataChanged(CharacterDataChangeInfo* aInfo);
NS_IMETHOD AttributeChanged(PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType);
virtual nsSplittableType GetSplittableType() const;
virtual nsIFrame* GetPrevContinuation() const;
NS_IMETHOD SetPrevContinuation(nsIFrame*);
virtual nsIFrame* GetNextContinuation() const;
NS_IMETHOD SetNextContinuation(nsIFrame*);
virtual nsIFrame* GetPrevInFlowVirtual() const;
NS_IMETHOD SetPrevInFlow(nsIFrame*);
virtual nsIFrame* GetNextInFlowVirtual() const;
NS_IMETHOD SetNextInFlow(nsIFrame*);
NS_IMETHOD GetOffsetFromView(nsPoint& aOffset, nsIView** aView) const;
virtual nsIAtom* GetType() const;
virtual PRBool IsContainingBlock() const;
NS_IMETHOD GetSelected(PRBool *aSelected) const;
NS_IMETHOD IsSelectable(PRBool* aIsSelectable, PRUint8* aSelectStyle) const;
NS_IMETHOD GetSelectionController(nsPresContext *aPresContext, nsISelectionController **aSelCon);
virtual PRBool PeekOffsetNoAmount(PRBool aForward, PRInt32* aOffset);
virtual PRBool PeekOffsetCharacter(PRBool aForward, PRInt32* aOffset,
PRBool aRespectClusters = PR_TRUE);
virtual PRBool PeekOffsetWord(PRBool aForward, PRBool aWordSelectEatSpace, PRBool aIsKeyboardSelect,
PRInt32* aOffset, PeekWordState *aState);
/**
* Check whether we should break at a boundary between punctuation and
* non-punctuation. Only call it at a punctuation boundary
* (i.e. exactly one of the previous and next characters are punctuation).
* @param aForward true if we're moving forward in content order
* @param aPunctAfter true if the next character is punctuation
* @param aWhitespaceAfter true if the next character is whitespace
*/
PRBool BreakWordBetweenPunctuation(const PeekWordState* aState,
PRBool aForward,
PRBool aPunctAfter, PRBool aWhitespaceAfter,
PRBool aIsKeyboardSelect);
NS_IMETHOD CheckVisibility(nsPresContext* aContext, PRInt32 aStartIndex, PRInt32 aEndIndex, PRBool aRecurse, PRBool *aFinished, PRBool *_retval);
NS_IMETHOD GetOffsets(PRInt32 &aStart, PRInt32 &aEnd) const;
virtual void ChildIsDirty(nsIFrame* aChild);
#ifdef ACCESSIBILITY
virtual already_AddRefed<nsAccessible> CreateAccessible();
#endif
NS_IMETHOD GetParentStyleContextFrame(nsPresContext* aPresContext,
nsIFrame** aProviderFrame,
PRBool* aIsChild);
virtual PRBool IsEmpty();
virtual PRBool IsSelfEmpty();
virtual void MarkIntrinsicWidthsDirty();
virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext);
virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext);
virtual void AddInlineMinWidth(nsRenderingContext *aRenderingContext,
InlineMinWidthData *aData);
virtual void AddInlinePrefWidth(nsRenderingContext *aRenderingContext,
InlinePrefWidthData *aData);
virtual IntrinsicWidthOffsetData
IntrinsicWidthOffsets(nsRenderingContext* aRenderingContext);
virtual IntrinsicSize GetIntrinsicSize();
virtual nsSize GetIntrinsicRatio();
virtual nsSize ComputeSize(nsRenderingContext *aRenderingContext,
nsSize aCBSize, nscoord aAvailableWidth,
nsSize aMargin, nsSize aBorder, nsSize aPadding,
PRBool aShrinkWrap);
// Compute tight bounds assuming this frame honours its border, background
// and outline, its children's tight bounds, and nothing else.
nsRect ComputeSimpleTightBounds(gfxContext* aContext) const;
/**
* A helper, used by |nsFrame::ComputeSize| (for frames that need to
* override only this part of ComputeSize), that computes the size
* that should be returned when 'width', 'height', and
* min/max-width/height are all 'auto' or equivalent.
*
* In general, frames that can accept any computed width/height should
* override only ComputeAutoSize, and frames that cannot do so need to
* override ComputeSize to enforce their width/height invariants.
*
* Implementations may optimize by returning a garbage width if
* GetStylePosition()->mWidth.GetUnit() != eStyleUnit_Auto, and
* likewise for height, since in such cases the result is guaranteed
* to be unused.
*/
virtual nsSize ComputeAutoSize(nsRenderingContext *aRenderingContext,
nsSize aCBSize, nscoord aAvailableWidth,
nsSize aMargin, nsSize aBorder,
nsSize aPadding, PRBool aShrinkWrap);
/**
* Utility function for ComputeAutoSize implementations. Return
* max(GetMinWidth(), min(aWidthInCB, GetPrefWidth()))
*/
nscoord ShrinkWidthToFit(nsRenderingContext *aRenderingContext,
nscoord aWidthInCB);
NS_IMETHOD WillReflow(nsPresContext* aPresContext);
NS_IMETHOD Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD DidReflow(nsPresContext* aPresContext,
const nsHTMLReflowState* aReflowState,
nsDidReflowStatus aStatus);
void ReflowAbsoluteFrames(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
void FinishReflowWithAbsoluteFrames(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
void DestroyAbsoluteFrames(nsIFrame* aDestructRoot);
virtual PRBool CanContinueTextRun() const;
// Selection Methods
// XXX Doc me... (in nsIFrame.h puhleeze)
// XXX If these are selection specific, then the name should imply selection
// rather than generic event processing, e.g., SelectionHandlePress...
NS_IMETHOD HandlePress(nsPresContext* aPresContext,
nsGUIEvent * aEvent,
nsEventStatus* aEventStatus);
NS_IMETHOD HandleMultiplePress(nsPresContext* aPresContext,
nsGUIEvent * aEvent,
nsEventStatus* aEventStatus,
PRBool aControlHeld);
NS_IMETHOD HandleDrag(nsPresContext* aPresContext,
nsGUIEvent * aEvent,
nsEventStatus* aEventStatus);
NS_IMETHOD HandleRelease(nsPresContext* aPresContext,
nsGUIEvent * aEvent,
nsEventStatus* aEventStatus);
NS_IMETHOD PeekBackwardAndForward(nsSelectionAmount aAmountBack,
nsSelectionAmount aAmountForward,
PRInt32 aStartPos,
nsPresContext* aPresContext,
PRBool aJumpLines,
PRBool aMultipleSelection);
// Helper for GetContentAndOffsetsFromPoint; calculation of content offsets
// in this function assumes there is no child frame that can be targeted.
virtual ContentOffsets CalcContentOffsetsFromFramePoint(nsPoint aPoint);
// Box layout methods
virtual nsSize GetPrefSize(nsBoxLayoutState& aBoxLayoutState);
virtual nsSize GetMinSize(nsBoxLayoutState& aBoxLayoutState);
virtual nsSize GetMaxSize(nsBoxLayoutState& aBoxLayoutState);
virtual nscoord GetFlex(nsBoxLayoutState& aBoxLayoutState);
virtual nscoord GetBoxAscent(nsBoxLayoutState& aBoxLayoutState);
// We compute and store the HTML content's overflow area. So don't
// try to compute it in the box code.
virtual PRBool ComputesOwnOverflowArea() { return PR_TRUE; }
//--------------------------------------------------
// Additional methods
/**
* Helper method to invalidate portions of a standard container frame if the
* desired size indicates that the size has changed (specifically border,
* background and outline).
* We assume that the difference between the old frame area and the new
* frame area is invalidated by some other means.
* @param aDesiredSize the new size of the frame
*/
void CheckInvalidateSizeChange(nsHTMLReflowMetrics& aNewDesiredSize);
// Helper function that tests if the frame tree is too deep; if it is
// it marks the frame as "unflowable", zeroes out the metrics, sets
// the reflow status, and returns PR_TRUE. Otherwise, the frame is
// unmarked "unflowable" and the metrics and reflow status are not
// touched and PR_FALSE is returned.
PRBool IsFrameTreeTooDeep(const nsHTMLReflowState& aReflowState,
nsHTMLReflowMetrics& aMetrics,
nsReflowStatus& aStatus);
// Do the work for getting the parent style context frame so that
// other frame's |GetParentStyleContextFrame| methods can call this
// method on *another* frame. (This function handles out-of-flow
// frames by using the frame manager's placeholder map and it also
// handles block-within-inline and generated content wrappers.)
nsresult DoGetParentStyleContextFrame(nsPresContext* aPresContext,
nsIFrame** aProviderFrame,
PRBool* aIsChild);
// Incorporate the child overflow areas into aOverflowAreas.
// If the child does not have a overflow, use the child area.
void ConsiderChildOverflow(nsOverflowAreas& aOverflowAreas,
nsIFrame* aChildFrame);
virtual const void* GetStyleDataExternal(nsStyleStructID aSID) const;
#ifdef NS_DEBUG
/**
* Tracing method that writes a method enter/exit routine to the
* nspr log using the nsIFrame log module. The tracing is only
* done when the NS_FRAME_TRACE_CALLS bit is set in the log module's
* level field.
*/
void Trace(const char* aMethod, PRBool aEnter);
void Trace(const char* aMethod, PRBool aEnter, nsReflowStatus aStatus);
void TraceMsg(const char* fmt, ...);
// Helper function that verifies that each frame in the list has the
// NS_FRAME_IS_DIRTY bit set
static void VerifyDirtyBitSet(const nsFrameList& aFrameList);
// Helper function to return the index in parent of the frame's content
// object. Returns -1 on error or if the frame doesn't have a content object
static PRInt32 ContentIndexInContainer(const nsIFrame* aFrame);
static void IndentBy(FILE* out, PRInt32 aIndent) {
while (--aIndent >= 0) fputs(" ", out);
}
void ListTag(FILE* out) const {
ListTag(out, this);
}
static void ListTag(FILE* out, const nsIFrame* aFrame) {
nsAutoString tmp;
aFrame->GetFrameName(tmp);
fputs(NS_LossyConvertUTF16toASCII(tmp).get(), out);
fprintf(out, "@%p", static_cast<const void*>(aFrame));
}
static void XMLQuote(nsString& aString);
/**
* Dump out the "base classes" regression data. This should dump
* out the interior data, not the "frame" XML container. And it
* should call the base classes same named method before doing
* anything specific in a derived class. This means that derived
* classes need not override DumpRegressionData unless they need
* some custom behavior that requires changing how the outer "frame"
* XML container is dumped.
*/
virtual void DumpBaseRegressionData(nsPresContext* aPresContext, FILE* out, PRInt32 aIndent);
nsresult MakeFrameName(const nsAString& aKind, nsAString& aResult) const;
// Display Reflow Debugging
static void* DisplayReflowEnter(nsPresContext* aPresContext,
nsIFrame* aFrame,
const nsHTMLReflowState& aReflowState);
static void* DisplayLayoutEnter(nsIFrame* aFrame);
static void* DisplayIntrinsicWidthEnter(nsIFrame* aFrame,
const char* aType);
static void* DisplayIntrinsicSizeEnter(nsIFrame* aFrame,
const char* aType);
static void DisplayReflowExit(nsPresContext* aPresContext,
nsIFrame* aFrame,
nsHTMLReflowMetrics& aMetrics,
PRUint32 aStatus,
void* aFrameTreeNode);
static void DisplayLayoutExit(nsIFrame* aFrame,
void* aFrameTreeNode);
static void DisplayIntrinsicWidthExit(nsIFrame* aFrame,
const char* aType,
nscoord aResult,
void* aFrameTreeNode);
static void DisplayIntrinsicSizeExit(nsIFrame* aFrame,
const char* aType,
nsSize aResult,
void* aFrameTreeNode);
static void DisplayReflowStartup();
static void DisplayReflowShutdown();
#endif
static void ShutdownLayerActivityTimer();
/**
* Adds display item for standard CSS background if necessary.
* Does not check IsVisibleForPainting.
* @param aForceBackground draw the background even if the frame
* background style appears to have no background --- this is useful
* for frames that might receive a propagated background via
* nsCSSRendering::FindBackground
*/
nsresult DisplayBackgroundUnconditional(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists,
PRBool aForceBackground = PR_FALSE);
/**
* Adds display items for standard CSS borders, background and outline for
* for this frame, as necessary. Checks IsVisibleForPainting and won't
* display anything if the frame is not visible.
* @param aForceBackground draw the background even if the frame
* background style appears to have no background --- this is useful
* for frames that might receive a propagated background via
* nsCSSRendering::FindBackground
*/
nsresult DisplayBorderBackgroundOutline(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists,
PRBool aForceBackground = PR_FALSE);
/**
* Add a display item for the CSS outline. Does not check visibility.
*/
nsresult DisplayOutlineUnconditional(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists);
/**
* Add a display item for the CSS outline, after calling
* IsVisibleForPainting to confirm we are visible.
*/
nsresult DisplayOutline(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists);
/**
* Adjust the given parent frame to the right style context parent frame for
* the child, given the pseudo-type of the prospective child. This handles
* things like walking out of table pseudos and so forth.
*
* @param aProspectiveParent what GetParent() on the child returns.
* Must not be null.
* @param aChildPseudo the child's pseudo type, if any.
*/
static nsIFrame*
CorrectStyleParentFrame(nsIFrame* aProspectiveParent, nsIAtom* aChildPseudo);
protected:
// Protected constructor and destructor
nsFrame(nsStyleContext* aContext);
virtual ~nsFrame();
/**
* To be called by |BuildDisplayLists| of this class or derived classes to add
* a translucent overlay if this frame's content is selected.
* @param aContentType an nsISelectionDisplay DISPLAY_ constant identifying
* which kind of content this is for
*/
nsresult DisplaySelectionOverlay(nsDisplayListBuilder* aBuilder,
nsDisplayList* aList, PRUint16 aContentType = nsISelectionDisplay::DISPLAY_FRAMES);
PRInt16 DisplaySelection(nsPresContext* aPresContext, PRBool isOkToTurnOn = PR_FALSE);
// Style post processing hook
virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext);
public:
//given a frame five me the first/last leaf available
//XXX Robert O'Callahan wants to move these elsewhere
static void GetLastLeaf(nsPresContext* aPresContext, nsIFrame **aFrame);
static void GetFirstLeaf(nsPresContext* aPresContext, nsIFrame **aFrame);
// Return the line number of the aFrame, and (optionally) the containing block
// frame.
// If aScrollLock is true, don't break outside scrollframes when looking for a
// containing block frame.
static PRInt32 GetLineNumber(nsIFrame *aFrame,
PRBool aLockScroll,
nsIFrame** aContainingBlock = nsnull);
// test whether aFrame should apply paginated overflow clipping.
static PRBool ApplyPaginatedOverflowClipping(nsIFrame* aFrame)
{
// If we're paginated and a block, and have NS_BLOCK_CLIP_PAGINATED_OVERFLOW
// set, then we want to clip our overflow.
return
aFrame->PresContext()->IsPaginated() &&
aFrame->GetType() == nsGkAtoms::blockFrame &&
(aFrame->GetStateBits() & NS_BLOCK_CLIP_PAGINATED_OVERFLOW) != 0;
}
protected:
// Test if we are selecting a table object:
// Most table/cell selection requires that Ctrl (Cmd on Mac) key is down
// during a mouse click or drag. Exception is using Shift+click when
// already in "table/cell selection mode" to extend a block selection
// Get the parent content node and offset of the frame
// of the enclosing cell or table (if not inside a cell)
// aTarget tells us what table element to select (currently only cell and table supported)
// (enums for this are defined in nsIFrame.h)
NS_IMETHOD GetDataForTableSelection(const nsFrameSelection *aFrameSelection,
nsIPresShell *aPresShell, nsMouseEvent *aMouseEvent,
nsIContent **aParentContent, PRInt32 *aContentOffset,
PRInt32 *aTarget);
// Fills aCursor with the appropriate information from ui
static void FillCursorInformationFromStyle(const nsStyleUserInterface* ui,
nsIFrame::Cursor& aCursor);
NS_IMETHOD DoLayout(nsBoxLayoutState& aBoxLayoutState);
#ifdef DEBUG_LAYOUT
virtual void GetBoxName(nsAutoString& aName);
#endif
void InitBoxMetrics(PRBool aClear);
nsBoxLayoutMetrics* BoxMetrics() const;
// Fire DOM event. If no aContent argument use frame's mContent.
void FireDOMEvent(const nsAString& aDOMEventName, nsIContent *aContent = nsnull);
private:
nsresult BoxReflow(nsBoxLayoutState& aState,
nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
nsRenderingContext* aRenderingContext,
nscoord aX,
nscoord aY,
nscoord aWidth,
nscoord aHeight,
PRBool aMoveFrame = PR_TRUE);
NS_IMETHODIMP RefreshSizeCache(nsBoxLayoutState& aState);
virtual nsILineIterator* GetLineIterator();
#ifdef NS_DEBUG
public:
// Formerly the nsIFrameDebug interface
NS_IMETHOD List(FILE* out, PRInt32 aIndent) const;
/**
* lists the frames beginning from the root frame
* - calls root frame's List(...)
*/
static void RootFrameList(nsPresContext* aPresContext,
FILE* out, PRInt32 aIndent);
static void DumpFrameTree(nsIFrame* aFrame);
/**
* Get a printable from of the name of the frame type.
* XXX This should be eliminated and we use GetType() instead...
*/
NS_IMETHOD GetFrameName(nsAString& aResult) const;
/**
* Return the state bits that are relevant to regression tests (that
* is, those bits which indicate a real difference when they differ
*/
NS_IMETHOD_(nsFrameState) GetDebugStateBits() const;
/**
* Called to dump out regression data that describes the layout
* of the frame and its children, and so on. The format of the
* data is dictated to be XML (using a specific DTD); the
* specific kind of data dumped is up to the frame itself, with
* the caveat that some base types are defined.
* For more information, see XXX.
*/
NS_IMETHOD DumpRegressionData(nsPresContext* aPresContext,
FILE* out, PRInt32 aIndent);
/**
* See if style tree verification is enabled. To enable style tree
* verification add "styleverifytree:1" to your NSPR_LOG_MODULES
* environment variable (any non-zero debug level will work). Or,
* call SetVerifyStyleTreeEnable with PR_TRUE.
*/
static PRBool GetVerifyStyleTreeEnable();
/**
* Set the verify-style-tree enable flag.
*/
static void SetVerifyStyleTreeEnable(PRBool aEnabled);
/**
* The frame class and related classes share an nspr log module
* for logging frame activity.
*
* Note: the log module is created during library initialization which
* means that you cannot perform logging before then.
*/
static PRLogModuleInfo* GetLogModuleInfo();
// Show frame borders when rendering
static void ShowFrameBorders(PRBool aEnable);
static PRBool GetShowFrameBorders();
// Show frame border of event target
static void ShowEventTargetFrameBorder(PRBool aEnable);
static PRBool GetShowEventTargetFrameBorder();
static void PrintDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayList& aList);
#endif
};
// Start Display Reflow Debugging
#ifdef DEBUG
struct DR_cookie {
DR_cookie(nsPresContext* aPresContext,
nsIFrame* aFrame,
const nsHTMLReflowState& aReflowState,
nsHTMLReflowMetrics& aMetrics,
nsReflowStatus& aStatus);
~DR_cookie();
void Change() const;
nsPresContext* mPresContext;
nsIFrame* mFrame;
const nsHTMLReflowState& mReflowState;
nsHTMLReflowMetrics& mMetrics;
nsReflowStatus& mStatus;
void* mValue;
};
struct DR_layout_cookie {
DR_layout_cookie(nsIFrame* aFrame);
~DR_layout_cookie();
nsIFrame* mFrame;
void* mValue;
};
struct DR_intrinsic_width_cookie {
DR_intrinsic_width_cookie(nsIFrame* aFrame, const char* aType,
nscoord& aResult);
~DR_intrinsic_width_cookie();
nsIFrame* mFrame;
const char* mType;
nscoord& mResult;
void* mValue;
};
struct DR_intrinsic_size_cookie {
DR_intrinsic_size_cookie(nsIFrame* aFrame, const char* aType,
nsSize& aResult);
~DR_intrinsic_size_cookie();
nsIFrame* mFrame;
const char* mType;
nsSize& mResult;
void* mValue;
};
struct DR_init_constraints_cookie {
DR_init_constraints_cookie(nsIFrame* aFrame, nsHTMLReflowState* aState,
nscoord aCBWidth, nscoord aCBHeight,
const nsMargin* aBorder,
const nsMargin* aPadding);
~DR_init_constraints_cookie();
nsIFrame* mFrame;
nsHTMLReflowState* mState;
void* mValue;
};
struct DR_init_offsets_cookie {
DR_init_offsets_cookie(nsIFrame* aFrame, nsCSSOffsetState* aState,
nscoord aCBWidth, const nsMargin* aBorder,
const nsMargin* aPadding);
~DR_init_offsets_cookie();
nsIFrame* mFrame;
nsCSSOffsetState* mState;
void* mValue;
};
struct DR_init_type_cookie {
DR_init_type_cookie(nsIFrame* aFrame, nsHTMLReflowState* aState);
~DR_init_type_cookie();
nsIFrame* mFrame;
nsHTMLReflowState* mState;
void* mValue;
};
#define DISPLAY_REFLOW(dr_pres_context, dr_frame, dr_rf_state, dr_rf_metrics, dr_rf_status) \
DR_cookie dr_cookie(dr_pres_context, dr_frame, dr_rf_state, dr_rf_metrics, dr_rf_status);
#define DISPLAY_REFLOW_CHANGE() \
dr_cookie.Change();
#define DISPLAY_LAYOUT(dr_frame) \
DR_layout_cookie dr_cookie(dr_frame);
#define DISPLAY_MIN_WIDTH(dr_frame, dr_result) \
DR_intrinsic_width_cookie dr_cookie(dr_frame, "Min", dr_result)
#define DISPLAY_PREF_WIDTH(dr_frame, dr_result) \
DR_intrinsic_width_cookie dr_cookie(dr_frame, "Pref", dr_result)
#define DISPLAY_PREF_SIZE(dr_frame, dr_result) \
DR_intrinsic_size_cookie dr_cookie(dr_frame, "Pref", dr_result)
#define DISPLAY_MIN_SIZE(dr_frame, dr_result) \
DR_intrinsic_size_cookie dr_cookie(dr_frame, "Min", dr_result)
#define DISPLAY_MAX_SIZE(dr_frame, dr_result) \
DR_intrinsic_size_cookie dr_cookie(dr_frame, "Max", dr_result)
#define DISPLAY_INIT_CONSTRAINTS(dr_frame, dr_state, dr_cbw, dr_cbh, \
dr_bdr, dr_pad) \
DR_init_constraints_cookie dr_cookie(dr_frame, dr_state, dr_cbw, dr_cbh, \
dr_bdr, dr_pad)
#define DISPLAY_INIT_OFFSETS(dr_frame, dr_state, dr_cbw, dr_bdr, dr_pad) \
DR_init_offsets_cookie dr_cookie(dr_frame, dr_state, dr_cbw, dr_bdr, dr_pad)
#define DISPLAY_INIT_TYPE(dr_frame, dr_result) \
DR_init_type_cookie dr_cookie(dr_frame, dr_result)
#else
#define DISPLAY_REFLOW(dr_pres_context, dr_frame, dr_rf_state, dr_rf_metrics, dr_rf_status)
#define DISPLAY_REFLOW_CHANGE()
#define DISPLAY_LAYOUT(dr_frame) PR_BEGIN_MACRO PR_END_MACRO
#define DISPLAY_MIN_WIDTH(dr_frame, dr_result) PR_BEGIN_MACRO PR_END_MACRO
#define DISPLAY_PREF_WIDTH(dr_frame, dr_result) PR_BEGIN_MACRO PR_END_MACRO
#define DISPLAY_PREF_SIZE(dr_frame, dr_result) PR_BEGIN_MACRO PR_END_MACRO
#define DISPLAY_MIN_SIZE(dr_frame, dr_result) PR_BEGIN_MACRO PR_END_MACRO
#define DISPLAY_MAX_SIZE(dr_frame, dr_result) PR_BEGIN_MACRO PR_END_MACRO
#define DISPLAY_INIT_CONSTRAINTS(dr_frame, dr_state, dr_cbw, dr_cbh, \
dr_bdr, dr_pad) \
PR_BEGIN_MACRO PR_END_MACRO
#define DISPLAY_INIT_OFFSETS(dr_frame, dr_state, dr_cbw, dr_bdr, dr_pad) \
PR_BEGIN_MACRO PR_END_MACRO
#define DISPLAY_INIT_TYPE(dr_frame, dr_result) PR_BEGIN_MACRO PR_END_MACRO
#endif
// End Display Reflow Debugging
// similar to NS_ENSURE_TRUE but with no return value
#define ENSURE_TRUE(x) \
PR_BEGIN_MACRO \
if (!(x)) { \
NS_WARNING("ENSURE_TRUE(" #x ") failed"); \
return; \
} \
PR_END_MACRO
#endif /* nsFrame_h___ */
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