gecko-dev/layout/base/nsCSSRendering.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):
*/
#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,
nscoord aHardBorderSize = 0,
PRBool aShouldIgnoreRounded = PR_FALSE);
/**
* Render the outline 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 PaintOutline(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 nsRect& aDirtyRect,
const PRUint8 borderStyles[],
const nscolor borderColors[],
const nsRect& borderOutside,
const nsRect& borderInside,
PRIntn aSkipSides,
nsRect* aGap);
static void DrawDashedSides(PRIntn startSide,
nsIRenderingContext& aContext,
const nsRect& aDirtyRect,
const nsStyleSpacing& aSpacing,
PRBool aDoOutline,
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[4],nsRect* aGap = 0,
PRBool aIsOutline=PR_FALSE);
static void RenderSide(nsPoint aPoints[],nsIRenderingContext& aRenderingContext,
const nsStyleSpacing& aBorderStyle,nsIStyleContext* aStyleContext,
PRUint8 aSide,nsMargin &aBorThick,nscoord aTwipsPerPixel,
PRBool aIsOutline=PR_FALSE);
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[4]);
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[4];
PRBool mDoRound;
PRInt16 mLeft;
PRInt16 mRight;
PRInt16 mTop;
PRInt16 mBottom;
/**
* Construct a rounded rectangle object
* @update 4/19/99
*/
void RoundRect() {mRoundness[0]=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[4],PRInt16 aNumTwipPerPix);
/**
* 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___ */