/* -*- 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): * Robert O'Callahan * Roger B. Sidje * Pierre Phaneuf * Prabhat Hegde * Tomi Leppikangas * Roland Mainz * Daniel Glazman * Neil Deakin * Masayuki Nakano * Mats Palmgren * Uri Bernstein * Stephen Blackheath * * 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 ***** */ #ifndef nsTextFrame_h__ #define nsTextFrame_h__ #include "nsFrame.h" #include "nsLineBox.h" #include "gfxFont.h" #include "gfxSkipChars.h" class nsTextPaintStyle; class PropertyProvider; class nsTextFrame : public nsFrame { public: nsTextFrame(nsStyleContext* aContext) : nsFrame(aContext) { NS_ASSERTION(mContentOffset == 0, "Bogus content offset"); } // nsIFrame NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder, const nsRect& aDirtyRect, const nsDisplayListSet& aLists); NS_IMETHOD Init(nsIContent* aContent, nsIFrame* aParent, nsIFrame* aPrevInFlow); virtual void Destroy(); NS_IMETHOD GetCursor(const nsPoint& aPoint, nsIFrame::Cursor& aCursor); NS_IMETHOD CharacterDataChanged(nsPresContext* aPresContext, nsIContent* aChild, PRBool aAppend); NS_IMETHOD DidSetStyleContext(); virtual nsIFrame* GetNextContinuation() const { return mNextContinuation; } NS_IMETHOD SetNextContinuation(nsIFrame* aNextContinuation) { NS_ASSERTION (!aNextContinuation || GetType() == aNextContinuation->GetType(), "setting a next continuation with incorrect type!"); NS_ASSERTION (!nsSplittableFrame::IsInNextContinuationChain(aNextContinuation, this), "creating a loop in continuation chain!"); mNextContinuation = aNextContinuation; if (aNextContinuation) aNextContinuation->RemoveStateBits(NS_FRAME_IS_FLUID_CONTINUATION); return NS_OK; } virtual nsIFrame* GetNextInFlowVirtual() const { return GetNextInFlow(); } nsIFrame* GetNextInFlow() const { return mNextContinuation && (mNextContinuation->GetStateBits() & NS_FRAME_IS_FLUID_CONTINUATION) ? mNextContinuation : nsnull; } NS_IMETHOD SetNextInFlow(nsIFrame* aNextInFlow) { NS_ASSERTION (!aNextInFlow || GetType() == aNextInFlow->GetType(), "setting a next in flow with incorrect type!"); NS_ASSERTION (!nsSplittableFrame::IsInNextContinuationChain(aNextInFlow, this), "creating a loop in continuation chain!"); mNextContinuation = aNextInFlow; if (aNextInFlow) aNextInFlow->AddStateBits(NS_FRAME_IS_FLUID_CONTINUATION); return NS_OK; } virtual nsIFrame* GetLastInFlow() const; virtual nsIFrame* GetLastContinuation() const; virtual nsSplittableType GetSplittableType() const { return NS_FRAME_SPLITTABLE; } /** * Get the "type" of the frame * * @see nsGkAtoms::textFrame */ virtual nsIAtom* GetType() const; virtual PRBool IsFrameOfType(PRUint32 aFlags) const { // Set the frame state bit for text frames to mark them as replaced. // XXX kipp: temporary return nsFrame::IsFrameOfType(aFlags & ~(nsIFrame::eReplaced | nsIFrame::eLineParticipant)); } #ifdef DEBUG NS_IMETHOD List(FILE* out, PRInt32 aIndent) const; NS_IMETHOD GetFrameName(nsAString& aResult) const; NS_IMETHOD_(nsFrameState) GetDebugStateBits() const ; #endif virtual ContentOffsets CalcContentOffsetsFromFramePoint(nsPoint aPoint); NS_IMETHOD SetSelected(nsPresContext* aPresContext, nsIDOMRange *aRange, PRBool aSelected, nsSpread aSpread); virtual PRBool PeekOffsetNoAmount(PRBool aForward, PRInt32* aOffset); virtual PRBool PeekOffsetCharacter(PRBool aForward, PRInt32* aOffset); virtual PRBool PeekOffsetWord(PRBool aForward, PRBool aWordSelectEatSpace, PRBool aIsKeyboardSelect, PRInt32* aOffset, PeekWordState* aState); NS_IMETHOD CheckVisibility(nsPresContext* aContext, PRInt32 aStartIndex, PRInt32 aEndIndex, PRBool aRecurse, PRBool *aFinished, PRBool *_retval); // Update offsets to account for new length. This may clear mTextRun. void SetLength(PRInt32 aLength); NS_IMETHOD GetOffsets(PRInt32 &start, PRInt32 &end)const; virtual void AdjustOffsetsForBidi(PRInt32 start, PRInt32 end); NS_IMETHOD GetPointFromOffset(PRInt32 inOffset, nsPoint* outPoint); NS_IMETHOD GetChildFrameContainingOffset(PRInt32 inContentOffset, PRBool inHint, PRInt32* outFrameContentOffset, nsIFrame* *outChildFrame); virtual PRBool IsVisibleInSelection(nsISelection* aSelection); virtual PRBool IsEmpty(); virtual PRBool IsSelfEmpty() { return IsEmpty(); } /** * @return PR_TRUE if this text frame ends with a newline character. It * should return PR_FALSE if this is not a text frame. */ virtual PRBool HasTerminalNewline() const; #ifdef ACCESSIBILITY NS_IMETHOD GetAccessible(nsIAccessible** aAccessible); #endif virtual void MarkIntrinsicWidthsDirty(); virtual nscoord GetMinWidth(nsIRenderingContext *aRenderingContext); virtual nscoord GetPrefWidth(nsIRenderingContext *aRenderingContext); virtual void AddInlineMinWidth(nsIRenderingContext *aRenderingContext, InlineMinWidthData *aData); virtual void AddInlinePrefWidth(nsIRenderingContext *aRenderingContext, InlinePrefWidthData *aData); virtual nsSize ComputeSize(nsIRenderingContext *aRenderingContext, nsSize aCBSize, nscoord aAvailableWidth, nsSize aMargin, nsSize aBorder, nsSize aPadding, PRBool aShrinkWrap); virtual nsRect ComputeTightBounds(gfxContext* aContext) const; NS_IMETHOD Reflow(nsPresContext* aPresContext, nsHTMLReflowMetrics& aMetrics, const nsHTMLReflowState& aReflowState, nsReflowStatus& aStatus); virtual PRBool CanContinueTextRun() const; NS_IMETHOD TrimTrailingWhiteSpace(nsPresContext* aPresContext, nsIRenderingContext& aRC, nscoord& aDeltaWidth, PRBool& aLastCharIsJustifiable); virtual nsresult GetRenderedText(nsAString* aString = nsnull, gfxSkipChars* aSkipChars = nsnull, gfxSkipCharsIterator* aSkipIter = nsnull, PRUint32 aSkippedStartOffset = 0, PRUint32 aSkippedMaxLength = PR_UINT32_MAX); nsRect RecomputeOverflowRect(); void AddInlineMinWidthForFlow(nsIRenderingContext *aRenderingContext, nsIFrame::InlineMinWidthData *aData); void AddInlinePrefWidthForFlow(nsIRenderingContext *aRenderingContext, InlinePrefWidthData *aData); gfxFloat GetSnappedBaselineY(gfxContext* aContext, gfxFloat aY); // primary frame paint method called from nsDisplayText void PaintText(nsIRenderingContext* aRenderingContext, nsPoint aPt, const nsRect& aDirtyRect); // helper: paint quirks-mode CSS text decorations void PaintTextDecorations(gfxContext* aCtx, const gfxRect& aDirtyRect, const gfxPoint& aFramePt, const gfxPoint& aTextBaselinePt, nsTextPaintStyle& aTextStyle, PropertyProvider& aProvider); // helper: paint text frame when we're impacted by at least one selection. // Return PR_FALSE if the text was not painted and we should continue with // the fast path. PRBool PaintTextWithSelection(gfxContext* aCtx, const gfxPoint& aFramePt, const gfxPoint& aTextBaselinePt, const gfxRect& aDirtyRect, PropertyProvider& aProvider, nsTextPaintStyle& aTextPaintStyle); // helper: paint text with foreground and background colors determined // by selection(s). Also computes a mask of all selection types applying to // our text, returned in aAllTypes. void PaintTextWithSelectionColors(gfxContext* aCtx, const gfxPoint& aFramePt, const gfxPoint& aTextBaselinePt, const gfxRect& aDirtyRect, PropertyProvider& aProvider, nsTextPaintStyle& aTextPaintStyle, SelectionDetails* aDetails, SelectionType* aAllTypes); // helper: paint text decorations for text selected by aSelectionType void PaintTextSelectionDecorations(gfxContext* aCtx, const gfxPoint& aFramePt, const gfxPoint& aTextBaselinePt, const gfxRect& aDirtyRect, PropertyProvider& aProvider, nsTextPaintStyle& aTextPaintStyle, SelectionDetails* aDetails, SelectionType aSelectionType); PRInt16 GetSelectionStatus(PRInt16* aSelectionFlags); #ifdef DEBUG void ToCString(nsString& aBuf, PRInt32* aTotalContentLength) const; #endif PRInt32 GetContentOffset() const { return mContentOffset; } PRInt32 GetContentLength() const { return GetContentEnd() - mContentOffset; } PRInt32 GetContentEnd() const; // This returns the length the frame thinks it *should* have after it was // last reflowed (0 if it hasn't been reflowed yet). This should be used only // when setting up the text offsets for a new continuation frame. PRInt32 GetContentLengthHint() const { return mContentLengthHint; } // Compute the length of the content mapped by this frame // and all its in-flow siblings. Basically this means starting at mContentOffset // and going to the end of the text node or the next bidi continuation // boundary. PRInt32 GetInFlowContentLength(); // Clears out mTextRun from this frame and all other frames that hold a reference // to it, then deletes the textrun. void ClearTextRun(); /** * Acquires the text run for this content, if necessary. * @param aRC the rendering context to use as a reference for creating * the textrun, if available (if not, we'll create one which will just be slower) * @param aBlock the block ancestor for this frame, or nsnull if unknown * @param aLine the line that this frame is on, if any, or nsnull if unknown * @param aFlowEndInTextRun if non-null, this returns the textrun offset of * end of the text associated with this frame and its in-flow siblings * @return a gfxSkipCharsIterator set up to map DOM offsets for this frame * to offsets into the textrun; its initial offset is set to this frame's * content offset */ gfxSkipCharsIterator EnsureTextRun(gfxContext* aReferenceContext = nsnull, nsIFrame* aLineContainer = nsnull, const nsLineList::iterator* aLine = nsnull, PRUint32* aFlowEndInTextRun = nsnull); gfxTextRun* GetTextRun() { return mTextRun; } void SetTextRun(gfxTextRun* aTextRun) { mTextRun = aTextRun; } // Get the DOM content range mapped by this frame after excluding // whitespace subject to start-of-line and end-of-line trimming. // The textrun must have been created before calling this. struct TrimmedOffsets { PRInt32 mStart; PRInt32 mLength; PRInt32 GetEnd() { return mStart + mLength; } }; TrimmedOffsets GetTrimmedOffsets(const nsTextFragment* aFrag, PRBool aTrimAfter); protected: virtual ~nsTextFrame(); nsIFrame* mNextContinuation; // The key invariant here is that mContentOffset never decreases along // a next-continuation chain. And of course mContentOffset is always <= the // the text node's content length, and the mContentOffset for the first frame // is always 0. Furthermore the text mapped by a frame is determined by // GetContentOffset() and GetContentLength()/GetContentEnd(), which get // the length from the difference between this frame's offset and the next // frame's offset, or the text length if there is no next frame. This means // the frames always map the text node without overlapping or leaving any gaps. PRInt32 mContentOffset; // This does *not* indicate the length of text currently mapped by the frame; // instead it's a hint saying that this frame *wants* to map this much text // so if we create a new continuation, this is where that continuation should // start. PRInt32 mContentLengthHint; nscoord mAscent; gfxTextRun* mTextRun; SelectionDetails* GetSelectionDetails(); void AdjustSelectionPointsForBidi(SelectionDetails *sdptr, PRInt32 textLength, PRBool isRTLChars, PRBool isOddLevel, PRBool isBidiSystem); }; #endif