/* -*- 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): * * 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 ***** */ /* utility functions for drawing borders and backgrounds */ #ifndef nsCSSRendering_h___ #define nsCSSRendering_h___ #include "nsIRenderingContext.h" #include "nsStyleConsts.h" #include "gfxContext.h" struct nsPoint; class nsStyleContext; class nsPresContext; class nsCSSRendering { public: /** * Initialize any static variables used by nsCSSRendering. */ static nsresult Init(); /** * Clean up any static variables used by nsCSSRendering. */ static void Shutdown(); /** * 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(nsPresContext* aPresContext, nsIRenderingContext& aRenderingContext, nsIFrame* aForFrame, const nsRect& aDirtyRect, const nsRect& aBorderArea, const nsStyleBorder& aBorderStyle, nsStyleContext* 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(nsPresContext* aPresContext, nsIRenderingContext& aRenderingContext, nsIFrame* aForFrame, const nsRect& aDirtyRect, const nsRect& aBorderArea, const nsStyleBorder& aBorderStyle, const nsStyleOutline& aOutlineStyle, nsStyleContext* aStyleContext, nsRect* aGap = 0); /** * Fill in an nsStyleBackground to be used to paint the background for * an element. The nsStyleBackground should first be initialized * using the pres context. This applies the rules for propagating * backgrounds between BODY, the root element, and the canvas. * @return PR_TRUE if there is some meaningful background. */ static PRBool FindBackground(nsPresContext* aPresContext, nsIFrame* aForFrame, const nsStyleBackground** aBackground, PRBool* aIsCanvas); /** * Find a non-transparent background, for various table-related and * HR-related backwards-compatibility hacks. Be very hesitant if * you're considering calling this function -- it's usually not what * you want. */ static const nsStyleBackground* FindNonTransparentBackground(nsStyleContext* aContext, PRBool aStartAtParent = PR_FALSE); /** * 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(nsPresContext* aPresContext, nsIRenderingContext& aRenderingContext, nsIFrame* aForFrame, const nsRect& aDirtyRect, const nsRect& aBorderArea, const nsStyleBorder& aBorder, const nsStylePadding& aPadding, PRBool aUsePrintSettings, nsRect* aBGClipRect = nsnull); /** * Same as |PaintBackground|, except using the provided style context * (which short-circuits the code that ensures that the root element's * background is drawn on the canvas. */ static void PaintBackgroundWithSC(nsPresContext* aPresContext, nsIRenderingContext& aRenderingContext, nsIFrame* aForFrame, const nsRect& aDirtyRect, const nsRect& aBorderArea, const nsStyleBackground& aColor, const nsStyleBorder& aBorder, const nsStylePadding& aPadding, PRBool aUsePrintSettings = PR_FALSE, nsRect* aBGClipRect = nsnull); /** * Called by the presShell when painting is finished, so we can clear our * inline background data cache. */ static void DidPaint(); 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 nsStyleColor* aColorStyle, const nsStyleBorder* aBorderStyle, const nsStyleOutline* aOutlineStyle, PRBool aDoOutline, const nsRect& borderOutside, const nsRect& borderInside, PRIntn aSkipSides, nsRect* aGap); // Draw a border segment in the table collapsing border model without beveling corners static void DrawTableBorderSegment(nsIRenderingContext& aContext, PRUint8 aBorderStyle, nscolor aBorderColor, const nsStyleBackground* aBGColor, const nsRect& aBorderRect, PRInt32 aAppUnitsPerCSSPixel, PRUint8 aStartBevelSide = 0, nscoord aStartBevelOffset = 0, PRUint8 aEndBevelSide = 0, nscoord aEndBevelOffset = 0); /** * transform a color to a color that will show up on a printer if needed * aMapColor - color to evaluate * aIsPrinter - Is this a printing device * return - the transformed color */ static nscolor TransformColor(nscolor aMapColor,PRBool aNoBackGround); /** * Function for painting the decoration lines for the text. * NOTE: aPt, aLineSize, aAscent and aOffset are non-rounded device pixels, * not app units. * input: * @param aGfxContext * @param aColor the color of the decoration line * @param aPt the top/left edge of the text * @param aLineSize the width and the height of the decoration * line * @param aAscent the ascent of the text * @param aOffset the offset of the decoration line from * the baseline of the text (if the value is * positive, the line is lifted up) * @param aDecoration which line will be painted. The value can be * NS_STYLE_TEXT_DECORATION_UNDERLINE or * NS_STYLE_TEXT_DECORATION_OVERLINE or * NS_STYLE_TEXT_DECORATION_LINE_THROUGH. * @param aStyle the style of the decoration line. The value * can be NS_STYLE_BORDER_STYLE_SOLID or * NS_STYLE_BORDER_STYLE_DOTTED or * NS_STYLE_BORDER_STYLE_DASHED or * NS_STYLE_BORDER_STYLE_DOUBLE. * @param aIsRTL when the text is RTL, it is true. */ static void PaintDecorationLine(gfxContext* aGfxContext, const nscolor aColor, const gfxPoint& aPt, const gfxSize& aLineSize, const gfxFloat aAscent, const gfxFloat aOffset, const PRUint8 aDecoration, const PRUint8 aStyle, const PRBool aIsRTL); /** * Function for getting the decoration line rect for the text. * NOTE: aLineSize, aAscent and aOffset are non-rounded device pixels, * not app units. * input: * @param aPresContext * @param aLineSize the width and the height of the decoration * line * @param aAscent the ascent of the text * @param aOffset the offset of the decoration line from * the baseline of the text (if the value is * positive, the line is lifted up) * @param aDecoration which line will be painted. The value can be * NS_STYLE_TEXT_DECORATION_UNDERLINE or * NS_STYLE_TEXT_DECORATION_OVERLINE or * NS_STYLE_TEXT_DECORATION_LINE_THROUGH. * @param aStyle the style of the decoration line. The value * can be NS_STYLE_BORDER_STYLE_SOLID or * NS_STYLE_BORDER_STYLE_DOTTED or * NS_STYLE_BORDER_STYLE_DASHED or * NS_STYLE_BORDER_STYLE_DOUBLE. * output: * @return the decoration line rect for the input, * the each values are app units. */ static nsRect GetTextDecorationRect(nsPresContext* aPresContext, const gfxSize& aLineSize, const gfxFloat aAscent, const gfxFloat aOffset, const PRUint8 aDecoration, const PRUint8 aStyle); protected: static void PaintBackgroundColor(nsPresContext* aPresContext, nsIRenderingContext& aRenderingContext, nsIFrame* aForFrame, const nsRect& aBgClipArea, const nsStyleBackground& aColor, const nsStyleBorder& aBorder, const nsStylePadding& aPadding, PRBool aCanPaintNonWhite); static void PaintRoundedBackground(nsPresContext* aPresContext, nsIRenderingContext& aRenderingContext, nsIFrame* aForFrame, const nsRect& aBorderArea, const nsStyleBackground& aColor, const nsStyleBorder& aBorder, nscoord aTheRadius[4], PRBool aCanPaintNonWhite); static nscolor MakeBevelColor(PRIntn whichSide, PRUint8 style, nscolor aBackgroundColor, nscolor aBorderColor); 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); static gfxRect GetTextDecorationRectInternal(const gfxPoint& aPt, const gfxSize& aLineSize, const gfxFloat aAscent, const gfxFloat aOffset, const PRUint8 aDecoration, const PRUint8 aStyle); }; #endif /* nsCSSRendering_h___ */