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/* -*- 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 ***** */
#ifndef nsHTMLContainerFrame_h___
#define nsHTMLContainerFrame_h___
#include "nsContainerFrame.h"
class nsString;
class nsAbsoluteFrame;
class nsPlaceholderFrame;
struct nsStyleDisplay;
struct nsStylePosition;
struct nsHTMLReflowMetrics;
struct nsHTMLReflowState;
// Some macros for container classes to do sanity checking on
// width/height/x/y values computed during reflow.
#ifdef DEBUG
#define CRAZY_W 500000
// 100000 lines, approximately. Assumes p2t is 15 and 15 pixels per line
#define CRAZY_H 22500000
#define CRAZY_WIDTH(_x) (((_x) < -CRAZY_W) || ((_x) > CRAZY_W))
#define CRAZY_HEIGHT(_y) (((_y) < -CRAZY_H) || ((_y) > CRAZY_H))
#endif
// Base class for html container frames that provides common
// functionality.
class nsHTMLContainerFrame : public nsContainerFrame {
public:
NS_IMETHOD Paint(nsPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer,
PRUint32 aFlags = 0);
/**
* Helper method to create next-in-flows if necessary. If aFrame
* already has a next-in-flow then this method does
* nothing. Otherwise, a new continuation frame is created and
* linked into the flow. In addition, the new frame becomes the
* next-sibling of aFrame. If aPlaceholderResult is not null and
* aFrame is a float or positioned, then *aPlaceholderResult holds
* a placeholder.
*/
static nsresult CreateNextInFlow(nsPresContext* aPresContext,
nsIFrame* aOuterFrame,
nsIFrame* aFrame,
nsIFrame*& aNextInFlowResult);
/**
* Helper method to wrap views around frames. Used by containers
* under special circumstances (can be used by leaf frames as well)
* @param aContentParentFrame
* if non-null, this is the frame
* which would have held aFrame except that aFrame was reparented
* to an alternative geometric parent. This is necessary
* so that aFrame can remember to get its Z-order from
* aContentParentFrame.
*/
static nsresult CreateViewForFrame(nsIFrame* aFrame,
nsIFrame* aContentParentFrame,
PRBool aForce);
static nsresult ReparentFrameView(nsPresContext* aPresContext,
nsIFrame* aChildFrame,
nsIFrame* aOldParentFrame,
nsIFrame* aNewParentFrame);
static nsresult ReparentFrameViewList(nsPresContext* aPresContext,
nsIFrame* aChildFrameList,
nsIFrame* aOldParentFrame,
nsIFrame* aNewParentFrame);
protected:
virtual PRIntn GetSkipSides() const = 0;
void PaintSelf(nsPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect) {
nsContainerFrame::PaintSelf(aPresContext, aRenderingContext,
aDirtyRect, GetSkipSides());
}
/**
* To be called *instead* of |PaintChildren| by frames that paint text
* decorations (block and inline frames). It will paint the
* decorations before and after the call to PaintChildren.
*/
void PaintDecorationsAndChildren(nsPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer,
PRBool aIsBlock,
PRUint32 aFlags = 0);
/**
* Helper function to paint text decorations for this frame. This
* function attempts to be general; hopefully particular frames can
* get away with overriding PaintTextDecorationLines. The function
* should be called for one text-decoration at the time. This is so
* line-through can be painted in front of children, while the other
* decorations can be drawn behind.
*/
void PaintTextDecorations(nsIRenderingContext& aRenderingContext,
nsIFontMetrics* aFontMetrics,
PRUint8 aDecoration,
nscolor aColor);
/**
* Fetch the text decorations for this frame.
* @param aIsBlock whether |this| is a block frame or no.
* @param aDecorations mask with all decorations.
* See bug 1777 and 20163 to understand how a
* frame can end up with several decorations.
* @param aUnderColor The color of underline if the appropriate bit
* in aDecoration is set. It is undefined otherwise.
* @param aOverColor The color of overline if the appropriate bit
* in aDecoration is set. It is undefined otherwise.
* @param aStrikeColor The color of strike-through if the appropriate bit
* in aDecoration is set. It is undefined otherwise.
* NOTE: This function assigns NS_STYLE_TEXT_DECORATION_NONE to
* aDecorations for text-less frames. See bug 20163 for
* details.
*/
void GetTextDecorations(nsPresContext* aPresContext,
PRBool aIsBlock,
PRUint8& aDecorations,
nscolor& aUnderColor,
nscolor& aOverColor,
nscolor& aStrikeColor);
/**
* Function that does the actual drawing of the textdecoration.
* input:
* @param aRenderingContext.
* @param aColor the color of the text-decoration
* @param aAscent ascent of the font from which the
* text-decoration was derived.
* @param aOffset distance *above* baseline where the
* text-decoration should be drawn,
* i.e. negative offsets draws *below*
* the baseline.
* @param aSize the thickness of the line
*/
virtual void PaintTextDecorationLines(nsIRenderingContext& aRenderingContext,
nscolor aColor,
nscoord aOffset,
nscoord aAscent,
nscoord aSize);
};
#endif /* nsHTMLContainerFrame_h___ */
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