/* -*- 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 */ #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" /** * 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 PeekOffset(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 FindTextRuns(nsLineLayout& aLineLayout); 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); //-------------------------------------------------- // 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 nsresult 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: // First test if Ctrl (Cmd on Mac) key is down during a mouse click or drag // If yes, 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(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); NS_IMETHOD GetSelectionController(nsIPresContext *aPresContext, nsISelectionController **aSelCon); 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___ */