mirror of
https://github.com/rn10950/RetroZilla.git
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189 lines
8.4 KiB
C++
189 lines
8.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsHTMLContainerFrame_h___
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#define nsHTMLContainerFrame_h___
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#include "nsContainerFrame.h"
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class nsString;
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class nsAbsoluteFrame;
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class nsPlaceholderFrame;
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struct nsStyleDisplay;
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struct nsStylePosition;
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struct nsHTMLReflowMetrics;
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struct nsHTMLReflowState;
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// Some macros for container classes to do sanity checking on
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// width/height/x/y values computed during reflow.
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#ifdef DEBUG
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#define CRAZY_W 500000
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// 100000 lines, approximately. Assumes p2t is 15 and 15 pixels per line
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#define CRAZY_H 22500000
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#define CRAZY_WIDTH(_x) (((_x) < -CRAZY_W) || ((_x) > CRAZY_W))
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#define CRAZY_HEIGHT(_y) (((_y) < -CRAZY_H) || ((_y) > CRAZY_H))
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#endif
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// Base class for html container frames that provides common
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// functionality.
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class nsHTMLContainerFrame : public nsContainerFrame {
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public:
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NS_IMETHOD Paint(nsPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer,
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PRUint32 aFlags = 0);
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/**
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* Helper method to create next-in-flows if necessary. If aFrame
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* already has a next-in-flow then this method does
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* nothing. Otherwise, a new continuation frame is created and
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* linked into the flow. In addition, the new frame becomes the
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* next-sibling of aFrame. If aPlaceholderResult is not null and
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* aFrame is a float or positioned, then *aPlaceholderResult holds
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* a placeholder.
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*/
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static nsresult CreateNextInFlow(nsPresContext* aPresContext,
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nsIFrame* aOuterFrame,
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nsIFrame* aFrame,
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nsIFrame*& aNextInFlowResult);
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/**
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* Helper method to wrap views around frames. Used by containers
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* under special circumstances (can be used by leaf frames as well)
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* @param aContentParentFrame
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* if non-null, this is the frame
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* which would have held aFrame except that aFrame was reparented
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* to an alternative geometric parent. This is necessary
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* so that aFrame can remember to get its Z-order from
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* aContentParentFrame.
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*/
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static nsresult CreateViewForFrame(nsIFrame* aFrame,
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nsIFrame* aContentParentFrame,
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PRBool aForce);
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static nsresult ReparentFrameView(nsPresContext* aPresContext,
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nsIFrame* aChildFrame,
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nsIFrame* aOldParentFrame,
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nsIFrame* aNewParentFrame);
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static nsresult ReparentFrameViewList(nsPresContext* aPresContext,
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nsIFrame* aChildFrameList,
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nsIFrame* aOldParentFrame,
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nsIFrame* aNewParentFrame);
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protected:
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virtual PRIntn GetSkipSides() const = 0;
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void PaintSelf(nsPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect) {
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nsContainerFrame::PaintSelf(aPresContext, aRenderingContext,
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aDirtyRect, GetSkipSides());
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}
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/**
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* To be called *instead* of |PaintChildren| by frames that paint text
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* decorations (block and inline frames). It will paint the
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* decorations before and after the call to PaintChildren.
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*/
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void PaintDecorationsAndChildren(nsPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer,
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PRBool aIsBlock,
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PRUint32 aFlags = 0);
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/**
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* Helper function to paint text decorations for this frame. This
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* function attempts to be general; hopefully particular frames can
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* get away with overriding PaintTextDecorationLines. The function
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* should be called for one text-decoration at the time. This is so
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* line-through can be painted in front of children, while the other
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* decorations can be drawn behind.
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*/
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void PaintTextDecorations(nsIRenderingContext& aRenderingContext,
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nsIFontMetrics* aFontMetrics,
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PRUint8 aDecoration,
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nscolor aColor);
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/**
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* Fetch the text decorations for this frame.
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* @param aIsBlock whether |this| is a block frame or no.
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* @param aDecorations mask with all decorations.
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* See bug 1777 and 20163 to understand how a
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* frame can end up with several decorations.
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* @param aUnderColor The color of underline if the appropriate bit
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* in aDecoration is set. It is undefined otherwise.
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* @param aOverColor The color of overline if the appropriate bit
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* in aDecoration is set. It is undefined otherwise.
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* @param aStrikeColor The color of strike-through if the appropriate bit
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* in aDecoration is set. It is undefined otherwise.
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* NOTE: This function assigns NS_STYLE_TEXT_DECORATION_NONE to
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* aDecorations for text-less frames. See bug 20163 for
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* details.
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*/
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void GetTextDecorations(nsPresContext* aPresContext,
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PRBool aIsBlock,
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PRUint8& aDecorations,
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nscolor& aUnderColor,
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nscolor& aOverColor,
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nscolor& aStrikeColor);
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/**
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* Function that does the actual drawing of the textdecoration.
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* input:
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* @param aRenderingContext.
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* @param aColor the color of the text-decoration
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* @param aAscent ascent of the font from which the
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* text-decoration was derived.
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* @param aOffset distance *above* baseline where the
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* text-decoration should be drawn,
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* i.e. negative offsets draws *below*
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* the baseline.
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* @param aSize the thickness of the line
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*/
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virtual void PaintTextDecorationLines(nsIRenderingContext& aRenderingContext,
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nscolor aColor,
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nscoord aOffset,
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nscoord aAscent,
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nscoord aSize);
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};
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#endif /* nsHTMLContainerFrame_h___ */
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