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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 -*-
*
* The contents of this file are subject to the Netscape 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/NPL/
*
* 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 Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Pierre Phaneuf <pp@ludusdesign.com>
*/
#ifndef nsFrame_h___
#define nsFrame_h___
#include "nsIFrame.h"
#include "nsRect.h"
#include "nsString.h"
#include "prlog.h"
#ifdef NS_DEBUG
#include "nsIFrameDebug.h"
#endif
#include "nsIPresShell.h"
#include "nsIReflowCommand.h"
#include "nsIFrameSelection.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(nsIFrameDebug::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(nsIFrameDebug::GetLogModuleInfo(),_bit)) { \
TraceMsg _args; \
} \
PR_END_MACRO
#define NS_FRAME_TRACE(_bit,_args) \
PR_BEGIN_MACRO \
if (NS_FRAME_LOG_TEST(nsIFrameDebug::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
//----------------------------------------------------------------------
/**
* 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 nsIFrame
#ifdef NS_DEBUG
, public nsIFrameDebug
#endif
{
public:
/**
* Create a new "empty" frame that maps a given piece of content into a
* 0,0 area.
*/
friend nsresult NS_NewEmptyFrame(nsIPresShell* aShell, nsIFrame** aInstancePtrResult);
// Overloaded new operator. Initializes the memory to 0 and relies on an arena
// (which comes from the presShell) to perform the allocation.
void* operator new(size_t sz, nsIPresShell* aPresShell);
// Overridden to prevent the global delete from being called, since the memory
// came out of an nsIArena instead of the global delete operator's heap.
// XXX Would like to make this private some day, but our UNIX compilers can't
// deal with it.
void operator delete(void* aPtr, size_t sz);
private:
// The normal operator new is disallowed on nsFrames.
#if (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95))
void* operator new(size_t sz) throw () { return nsnull; };
#else
void* operator new(size_t sz) { return nsnull; };
#endif
public:
// nsISupports
NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
// nsIFrame
NS_IMETHOD Init(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsIStyleContext* aContext,
nsIFrame* asPrevInFlow);
NS_IMETHOD SetInitialChildList(nsIPresContext* aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList);
NS_IMETHOD AppendFrames(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aFrameList);
NS_IMETHOD InsertFrames(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList);
NS_IMETHOD RemoveFrame(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aOldFrame);
NS_IMETHOD ReplaceFrame(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aOldFrame,
nsIFrame* aNewFrame);
NS_IMETHOD Destroy(nsIPresContext* aPresContext);
NS_IMETHOD GetContent(nsIContent** aContent) const;
NS_IMETHOD GetStyleContext(nsIStyleContext** aStyleContext) const;
NS_IMETHOD SetStyleContext(nsIPresContext* aPresContext,
nsIStyleContext* aContext);
NS_IMETHOD GetStyleData(nsStyleStructID aSID,
const nsStyleStruct*& aStyleStruct) const;
NS_IMETHOD GetAdditionalStyleContext(PRInt32 aIndex,
nsIStyleContext** aStyleContext) const;
NS_IMETHOD SetAdditionalStyleContext(PRInt32 aIndex,
nsIStyleContext* aStyleContext);
NS_IMETHOD GetParent(nsIFrame** aParent) const;
NS_IMETHOD SetParent(const nsIFrame* aParent);
NS_IMETHOD GetRect(nsRect& aRect) const;
NS_IMETHOD GetOrigin(nsPoint& aPoint) const;
NS_IMETHOD GetSize(nsSize& aSize) const;
NS_IMETHOD SetRect(nsIPresContext* aPresContext, const nsRect& aRect);
NS_IMETHOD MoveTo(nsIPresContext* aPresContext, nscoord aX, nscoord aY);
NS_IMETHOD SizeTo(nsIPresContext* aPresContext, nscoord aWidth, nscoord aHeight);
NS_IMETHOD GetAdditionalChildListName(PRInt32 aIndex, nsIAtom** aListName) const;
NS_IMETHOD FirstChild(nsIPresContext* aPresContext,
nsIAtom* aListName,
nsIFrame** aFirstChild) const;
NS_IMETHOD Paint(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer);
NS_IMETHOD HandleEvent(nsIPresContext* aPresContext,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus);
NS_IMETHOD GetContentForEvent(nsIPresContext* aPresContext,
nsEvent* aEvent,
nsIContent** aContent);
NS_IMETHOD GetCursor(nsIPresContext* aPresContext,
nsPoint& aPoint,
PRInt32& aCursor);
NS_IMETHOD GetFrameForPoint(nsIPresContext* aPresContext,
const nsPoint& aPoint,
nsFramePaintLayer aWhichLayer,
nsIFrame** aFrame);
NS_IMETHOD GetPointFromOffset(nsIPresContext* inPresContext,
nsIRenderingContext* inRendContext,
PRInt32 inOffset,
nsPoint* outPoint);
NS_IMETHOD GetChildFrameContainingOffset(PRInt32 inContentOffset,
PRBool inHint,
PRInt32* outFrameContentOffset,
nsIFrame* *outChildFrame);
static nsresult GetNextPrevLineFromeBlockFrame(nsIPresContext* aPresContext,
nsPeekOffsetStruct *aPos,
nsIFrame *aBlockFrame,
PRInt32 aLineStart,
PRInt8 aOutSideLimit
);
NS_IMETHOD GetFrameState(nsFrameState* aResult);
NS_IMETHOD SetFrameState(nsFrameState aNewState);
NS_IMETHOD ContentChanged(nsIPresContext* aPresContext,
nsIContent* aChild,
nsISupports* aSubContent);
NS_IMETHOD AttributeChanged(nsIPresContext* aPresContext,
nsIContent* aChild,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aHint);
NS_IMETHOD ContentStateChanged(nsIPresContext* aPresContext,
nsIContent* aChild,
PRInt32 aHint);
NS_IMETHOD IsSplittable(nsSplittableType& aIsSplittable) const;
NS_IMETHOD GetPrevInFlow(nsIFrame** aPrevInFlow) const;
NS_IMETHOD SetPrevInFlow(nsIFrame*);
NS_IMETHOD GetNextInFlow(nsIFrame** aNextInFlow) const;
NS_IMETHOD SetNextInFlow(nsIFrame*);
NS_IMETHOD GetView(nsIPresContext* aPresContext, nsIView** aView) const;
NS_IMETHOD SetView(nsIPresContext* aPresContext, nsIView* aView);
NS_IMETHOD GetParentWithView(nsIPresContext* aPresContext, nsIFrame** aParent) const;
NS_IMETHOD GetOffsetFromView(nsIPresContext* aPresContext, nsPoint& aOffset, nsIView** aView) const;
NS_IMETHOD GetWindow(nsIPresContext* aPresContext, nsIWidget**) const;
NS_IMETHOD GetFrameType(nsIAtom** aType) const;
NS_IMETHOD IsPercentageBase(PRBool& aBase) const;
NS_IMETHOD GetNextSibling(nsIFrame** aNextSibling) const;
NS_IMETHOD SetNextSibling(nsIFrame* aNextSibling);
NS_IMETHOD Scrolled(nsIView *aView);
#ifdef NS_DEBUG
NS_IMETHOD List(nsIPresContext* aPresContext, FILE* out, PRInt32 aIndent) const;
NS_IMETHOD GetFrameName(nsString& aResult) const;
NS_IMETHOD DumpRegressionData(nsIPresContext* aPresContext, FILE* out, PRInt32 aIndent);
NS_IMETHOD SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const;
NS_IMETHOD VerifyTree() const;
#endif
NS_IMETHOD SetSelected(nsIPresContext* aPresContext, nsIDOMRange *aRange,PRBool aSelected, nsSpread aSpread);
NS_IMETHOD GetSelected(PRBool *aSelected) const;
NS_IMETHOD IsSelectable(PRBool* aIsSelectable, PRUint8* aSelectStyle) const;
NS_IMETHOD GetSelectionController(nsIPresContext *aPresContext, nsISelectionController **aSelCon);
NS_IMETHOD PeekOffset(nsIPresContext* aPresContext, nsPeekOffsetStruct *aPos) ;
NS_IMETHOD CheckVisibility(nsIPresContext* aContext, PRInt32 aStartIndex, PRInt32 aEndIndex, PRBool aRecurse, PRBool *aFinished, PRBool *_retval);
NS_IMETHOD PeekOffsetParagraph(nsIPresContext* aPresContext,
nsPeekOffsetStruct *aPos);
NS_IMETHOD GetOffsets(PRInt32 &aStart, PRInt32 &aEnd) const;
NS_IMETHOD ReflowDirtyChild(nsIPresShell* aPresShell, nsIFrame* aChild);
// nsIHTMLReflow
NS_IMETHOD WillReflow(nsIPresContext* aPresContext);
NS_IMETHOD Reflow(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD DidReflow(nsIPresContext* aPresContext,
nsDidReflowStatus aStatus);
NS_IMETHOD CanContinueTextRun(PRBool& aContinueTextRun) const;
NS_IMETHOD AdjustFrameSize(nscoord aExtraSpace, nscoord& aUsedSpace);
NS_IMETHOD TrimTrailingWhiteSpace(nsIPresContext* aPresContext,
nsIRenderingContext& aRC,
nscoord& aDeltaWidth);
// 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(nsIPresContext* aPresContext,
nsGUIEvent * aEvent,
nsEventStatus* aEventStatus);
NS_IMETHOD HandleMultiplePress(nsIPresContext* aPresContext,
nsGUIEvent * aEvent,
nsEventStatus* aEventStatus);
NS_IMETHOD HandleDrag(nsIPresContext* aPresContext,
nsGUIEvent * aEvent,
nsEventStatus* aEventStatus);
NS_IMETHOD HandleRelease(nsIPresContext* aPresContext,
nsGUIEvent * aEvent,
nsEventStatus* aEventStatus);
NS_IMETHOD GetContentAndOffsetsFromPoint(nsIPresContext* aCX,
const nsPoint& aPoint,
nsIContent ** aNewContent,
PRInt32& aContentOffset,
PRInt32& aContentOffsetEnd,
PRBool& aBeginFrameContent);
NS_IMETHOD PeekBackwardAndForward(nsSelectionAmount aAmountBack,
nsSelectionAmount aAmountForward,
PRInt32 aStartPos,
nsIPresContext* aPresContext,
PRBool aJumpLines);
//--------------------------------------------------
// Additional methods
// Invalidate part of the frame by asking the view manager to repaint.
// aDamageRect is in the frame's local coordinate space
void Invalidate(nsIPresContext* aPresContext,
const nsRect& aDamageRect,
PRBool aImmediate = PR_FALSE) const;
// 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);
// Helper function that tests if the frame tree is too deep; if it
// is it marks the frame as "unflowable" and zeros out the metrics
// and returns PR_TRUE. Otherwise, the frame is unmarked
// "unflowable" and the metrics are not touched and PR_FALSE is
// returned.
PRBool IsFrameTreeTooDeep(const nsHTMLReflowState& aReflowState,
nsHTMLReflowMetrics& aMetrics);
virtual nsresult GetClosestViewForFrame(nsIPresContext* aPresContext,
nsIFrame *aFrame,
nsIView **aView);
static nsresult CreateAndPostReflowCommand(nsIPresShell* aPresShell,
nsIFrame* aTargetFrame,
nsIReflowCommand::ReflowType aReflowType,
nsIFrame* aChildFrame,
nsIAtom* aAttribute,
nsIAtom* aListName);
//Mouse Capturing code used by the frames to tell the view to capture all the following events
NS_IMETHOD CaptureMouse(nsIPresContext* aPresContext, PRBool aGrabMouseEvents);
PRBool IsMouseCaptured(nsIPresContext* aPresContext);
#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(nsIFrame* aFrameList);
void ListTag(FILE* out) const {
ListTag(out, (nsIFrame*)this);
}
static void ListTag(FILE* out, nsIFrame* aFrame) {
nsAutoString tmp;
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(aFrame->QueryInterface(NS_GET_IID(nsIFrameDebug), (void**)&frameDebug))) {
frameDebug->GetFrameName(tmp);
}
fputs(tmp, out);
fprintf(out, "@%p", aFrame);
}
static void IndentBy(FILE* out, PRInt32 aIndent) {
while (--aIndent >= 0) fputs(" ", out);
}
/**
* 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(nsIPresContext* aPresContext, FILE* out, PRInt32 aIndent);
nsresult MakeFrameName(const char* aKind, nsString& aResult) const;
#endif
protected:
// Protected constructor and destructor
nsFrame();
virtual ~nsFrame();
PRInt16 DisplaySelection(nsIPresContext* aPresContext, PRBool isOkToTurnOn = PR_FALSE);
//this will modify aPos and return the next frame ect.
NS_IMETHOD GetFrameFromDirection(nsIPresContext* aPresContext, nsPeekOffsetStruct *aPos);
// Style post processing hook
NS_IMETHOD DidSetStyleContext(nsIPresContext* aPresContext);
//return the line number of the aFrame
static PRInt32 GetLineNumber(nsIFrame *aFrame);
//given a frame five me the first/last leaf available
static void GetLastLeaf(nsIPresContext* aPresContext, nsIFrame **aFrame);
static void GetFirstLeaf(nsIPresContext* aPresContext, nsIFrame **aFrame);
// 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(nsIFrameSelection *aFrameSelection, nsMouseEvent *aMouseEvent,
nsIContent **aParentContent, PRInt32 *aContentOffset, PRUint32 *aTarget);
static void XMLQuote(nsString& aString);
virtual PRBool ParentDisablesSelection() const;
// Set the overflow clip rect into the rendering-context. Used for block-level
// elements and replaced elements that have 'overflow' set to 'hidden'. This
// member function assumes that the caller has checked that the clip property
// applies to its situation.
void SetOverflowClipRect(nsIRenderingContext& aRenderingContext);
nsRect mRect;
nsIContent* mContent;
nsIStyleContext* mStyleContext;
nsIFrame* mParent;
nsIFrame* mNextSibling; // singly linked list of frames
nsFrameState mState;
protected:
NS_IMETHOD_(nsrefcnt) AddRef(void);
NS_IMETHOD_(nsrefcnt) Release(void);
};
#endif /* nsFrame_h___ */
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