/* -*- 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 1.0 (the "NPL"); you may not use this file except in * compliance with the NPL. You may obtain a copy of the NPL at * http://www.mozilla.org/NPL/ * * Software distributed under the NPL is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL * for the specific language governing rights and limitations under the * NPL. * * The Initial Developer of this code under the NPL is Netscape * Communications Corporation. Portions created by Netscape are * Copyright (C) 1998 Netscape Communications Corporation. All Rights * Reserved. */ #ifndef nsCSSRendering_h___ #define nsCSSRendering_h___ #include "nsIRenderingContext.h" #include "nsIStyleContext.h" struct nsPoint; class nsCSSRendering { public: /** * Render the border for an element using css rendering rules * for borders. aSkipSides is a bitmask of the sides to skip * when rendering. If 0 then no sides are skipped. * * Both aDirtyRect and aBorderArea are in the local coordinate space * of aForFrame */ static void PaintBorder(nsIPresContext& aPresContext, nsIRenderingContext& aRenderingContext, nsIFrame* aForFrame, const nsRect& aDirtyRect, const nsRect& aBorderArea, const nsStyleSpacing& aBorderStyle, nsIStyleContext* aStyleContext, PRIntn aSkipSides, nsRect* aGap = 0); /** * Just like PaintBorder, but takes as input a list of border segments * rather than a single border style. Useful for any object that needs to * draw a border where an edge is not necessarily homogenous. * Render the border for an element using css rendering rules * for borders. aSkipSides is a bitmask of the sides to skip * when rendering. If 0 then no sides are skipped. * * Both aDirtyRect and aBorderArea are in the local coordinate space * of aForFrame */ static void PaintBorderEdges(nsIPresContext& aPresContext, nsIRenderingContext& aRenderingContext, nsIFrame* aForFrame, const nsRect& aDirtyRect, const nsRect& aBorderArea, nsBorderEdges * aBorderEdges, nsIStyleContext* aStyleContext, PRIntn aSkipSides, nsRect* aGap = 0); /** * Render the background for an element using css rendering rules * for backgrounds. * * Both aDirtyRect and aBorderArea are in the local coordinate space * of aForFrame */ static void PaintBackground(nsIPresContext& aPresContext, nsIRenderingContext& aRenderingContext, nsIFrame* aForFrame, const nsRect& aDirtyRect, const nsRect& aBorderArea, const nsStyleColor& aColor, const nsStyleSpacing& aStyle, nscoord aDX, nscoord aDY); static void DrawDashedSides(PRIntn startSide, nsIRenderingContext& aContext, const PRUint8 borderStyles[], const nscolor borderColors[], const nsRect& borderOutside, const nsRect& borderInside, PRIntn aSkipSides, nsRect* aGap); static void DrawDashedSides(PRIntn startSide, nsIRenderingContext& aContext, const nsStyleSpacing& aSpacing, const nsRect& borderOutside, const nsRect& borderInside, PRIntn aSkipSides, nsRect* aGap); /** draw the dashed segements of a segmented border */ //XXX: boy is it annoying that we have 3 methods to draw dashed sides! // they clearly can be factored. static void DrawDashedSegments(nsIRenderingContext& aContext, const nsRect& aBounds, nsBorderEdges * aBorderEdges, PRIntn aSkipSides, nsRect* aGap); protected: /** * Render the border for an element using css rendering rules * for borders. aSkipSides is a bitmask of the sides to skip * when rendering. If 0 then no sides are skipped. * Both aDirtyRect and aBorderArea are in the local coordinate space * of aForFrame */ static void PaintRoundedBorder(nsIPresContext& aPresContext, nsIRenderingContext& aRenderingContext, nsIFrame* aForFrame, const nsRect& aDirtyRect, const nsRect& aBorderArea, const nsStyleSpacing& aBorderStyle, nsIStyleContext* aStyleContext, PRIntn aSkipSides, PRInt16 aBorderRadius,nsRect* aGap = 0); static void RenderSide(nsPoint aPoints[],nsIRenderingContext& aRenderingContext, const nsStyleSpacing& aBorderStyle,nsIStyleContext* aStyleContext, PRUint8 aSide,nsMargin &aBorThick,nscoord aTwipsPerPixel); static void PaintRoundedBackground(nsIPresContext& aPresContext, nsIRenderingContext& aRenderingContext, nsIFrame* aForFrame, const nsRect& aDirtyRect, const nsRect& aBorderArea, const nsStyleColor& aColor, const nsStyleSpacing& aStyle, nscoord aDX, nscoord aDY, PRInt16 aTheRadius); static nscolor MakeBevelColor(PRIntn whichSide, PRUint8 style, nscolor aBackgroundColor, nscolor aBorderColor, PRBool aSpecialCase); static PRIntn MakeSide(nsPoint aPoints[], nsIRenderingContext& aContext, PRIntn whichSide, const nsRect& outside, const nsRect& inside, PRIntn aSkipSides, PRIntn borderPart, float borderFrac, nscoord twipsPerPixel); static void DrawSide(nsIRenderingContext& aContext, PRIntn whichSide, const PRUint8 borderStyle, const nscolor borderColor, const nscolor aBackgroundColor, const nsRect& borderOutside, const nsRect& borderInside, PRIntn aSkipSides, nscoord twipsPerPixel, nsRect* aGap = 0); static void DrawLine (nsIRenderingContext& aContext, nscoord aX1, nscoord aY1, nscoord aX2, nscoord aY2, nsRect* aGap); static void FillPolygon (nsIRenderingContext& aContext, const nsPoint aPoints[], PRInt32 aNumPoints, nsRect* aGap); }; /** --------------------------------------------------- * Class QBCurve, a quadratic bezier curve, used to implement the rounded rectangles * @update 3/26/99 dwc */ class QBCurve { public: nsPoint mAnc1; nsPoint mCon; nsPoint mAnc2; QBCurve() {mAnc1.x=0;mAnc1.y=0;mCon=mAnc2=mAnc1;} void SetControls(nsPoint &aAnc1,nsPoint &aCon,nsPoint &aAnc2) { mAnc1 = aAnc1; mCon = aCon; mAnc2 = aAnc2;} void SetPoints(nscoord a1x,nscoord a1y,nscoord acx,nscoord acy,nscoord a2x,nscoord a2y) {mAnc1.MoveTo(a1x,a1y),mCon.MoveTo(acx,acy),mAnc2.MoveTo(a2x,a2y);} /** --------------------------------------------------- * Divide a Quadratic curve into line segments if it is not smaller than a certain size * else it is so small that it can be approximated by 2 lineto calls * @param aRenderingContext -- The RenderingContext to use to draw with * @param aPointArray[] -- A list of points we can put line calls into instead of drawing. If null, lines are drawn * @param aCurInex -- a pointer to an Integer that tells were to put the points into the array, incremented when finished * @update 3/26/99 dwc */ void SubDivide(nsIRenderingContext *aRenderingContext,nsPoint aPointArray[],PRInt32 *aCurIndex); /** --------------------------------------------------- * Divide a Quadratic Bezier curve at the mid-point * @update 3/26/99 dwc * @param aCurve1 -- Curve 1 as a result of the division * @param aCurve2 -- Curve 2 as a result of the division */ void MidPointDivide(QBCurve *A,QBCurve *B); }; /** --------------------------------------------------- * Class RoundedRect, A class to encapsulate all the rounded rect functionality, * which are based on the QBCurve * @update 4/13/99 dwc */ class RoundedRect { public: PRInt32 mRoundness; PRInt16 mOuterLeft; PRInt16 mOuterRight; PRInt16 mOuterTop; PRInt16 mOuterBottom; PRInt16 mInnerLeft; PRInt16 mInnerRight; PRInt16 mInnerTop; PRInt16 mInnerBottom; /** * Construct a rounded rectangle object * @update 4/19/99 */ void RoundRect() {mRoundness=0;} /** * Set the curves boundaries and then break it up into the curve pieces for rendering * @update 4/13/99 dwc * @param aLeft -- Left side of bounding box * @param aTop -- Top side of bounding box * @param aWidth -- Width of bounding box * @param aHeight -- Height of bounding box * @param aRadius -- radius for the rounding */ void Set(nscoord aLeft,nscoord aTop,PRInt32 aWidth,PRInt32 aHeight,PRInt16 aRadius); /** * Calculate the inset of a curve based on a border * @update 4/13/99 dwc * @param aLeft -- Left side of bounding box * @param aTop -- Top side of bounding box */ void CalcInsetCurves(QBCurve &aULCurve,QBCurve &aURCurve,QBCurve &aLLCurve,QBCurve &aLRCurve,nsMargin &aBorder); /** --------------------------------------------------- * set the passed in curves to the rounded borders of the rectangle * @update 4/13/99 dwc * @param aULCurve -- upperleft curve * @param aURCurve -- upperright curve * @param aLRCurve -- lowerright curve * @param aLLCurve -- lowerleft curve */ void GetRoundedBorders(QBCurve &aULCurve,QBCurve &aURCurve,QBCurve &aLLCurve,QBCurve &aLRCurve); }; #endif /* nsCSSRendering_h___ */