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Flying Saucer is a CSS 2.1 renderer written in Java. This artifact contains the core rendering and layout code as well as Java2D output.
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/*
 * {{{ header & license
 * Copyright (c) 2004, 2005 Joshua Marinacci
 * Copyright (c) 2006, 2007 Wisconsin Court System
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2.1
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 * }}}
 */
package org.xhtmlrenderer.render;

import java.util.Iterator;
import java.util.List;

import org.w3c.dom.Element;
import org.xhtmlrenderer.css.style.CalculatedStyle;
import org.xhtmlrenderer.css.style.CssContext;
import org.xhtmlrenderer.layout.LayoutContext;
import org.xhtmlrenderer.layout.Styleable;

/**
 * An anonymous block box as defined in the CSS spec.  This class is only used
 * when wrapping inline content in a block box in order to ensure that a block
 * box only ever contains either block or inline content.  Other anonymous block
 * boxes create a BlockBox directly with the anonymous property is
 * true.
 */
public class AnonymousBlockBox extends BlockBox {
    private List _openInlineBoxes;
    
    public AnonymousBlockBox(Element element) {
        setElement(element);
    }

    public void layout(LayoutContext c) {
        layoutInlineChildren(c, 0, calcInitialBreakAtLine(c), true);
    }

    public int getContentWidth() {
        return getContainingBlock().getContentWidth();
    }
    
    public Box find(CssContext cssCtx, int absX, int absY, boolean findAnonymous) {
        Box result = super.find(cssCtx, absX, absY, findAnonymous);
        if (! findAnonymous && result == this) {
            return getParent();
        } else {
            return result;
        }
    }

    public List getOpenInlineBoxes() {
        return _openInlineBoxes;
    }

    public void setOpenInlineBoxes(List openInlineBoxes) {
        _openInlineBoxes = openInlineBoxes;
    }
    
    public boolean isSkipWhenCollapsingMargins() {
        // An anonymous block will already have its children provided to it
        for (Iterator i = getInlineContent().iterator(); i.hasNext(); ) {
            Styleable styleable = (Styleable)i.next();
            CalculatedStyle style = styleable.getStyle();
            if (! (style.isFloated() || style.isAbsolute() || style.isFixed() || style.isRunning())) {
                return false;
            }
        }
        return true;
    }
    
    public void provideSiblingMarginToFloats(int margin) {
        for (Iterator i = getInlineContent().iterator(); i.hasNext(); ) {
            Styleable styleable = (Styleable)i.next();
            if (styleable instanceof BlockBox) {
                BlockBox b = (BlockBox)styleable;
                if (b.isFloated()) {
                    b.getFloatedBoxData().setMarginFromSibling(margin);
                }
            }
        }
    }
    
    public boolean isMayCollapseMarginsWithChildren() {
        return false;
    }
    
    public void styleText(LayoutContext c) {
        styleText(c, getParent().getStyle());
    } 
    
    public BlockBox copyOf() {
        throw new IllegalArgumentException("cannot be copied");
    }
}

/*
 * $Id$
 *
 * $Log$
 * Revision 1.27  2008/12/14 13:53:32  peterbrant
 * Implement -fs-keep-with-inline: keep property that instructs FS to try to avoid breaking a box so that only borders and padding appear on a page
 *
 * Revision 1.26  2007/08/28 22:31:26  peterbrant
 * Implement widows and orphans properties
 *
 * Revision 1.25  2007/08/19 22:22:50  peterbrant
 * Merge R8pbrant changes to HEAD
 *
 * Revision 1.24.2.3  2007/08/07 17:06:32  peterbrant
 * Implement named pages / Implement page-break-before/after: left/right / Experiment with efficient selection
 *
 * Revision 1.24.2.2  2007/07/11 22:48:30  peterbrant
 * Further progress on running headers and footers
 *
 * Revision 1.24.2.1  2007/07/09 22:18:03  peterbrant
 * Begin work on running headers and footers and named pages
 *
 * Revision 1.24  2007/06/07 16:56:29  peterbrant
 * When vertically aligning table cell content, call layout again on cells as necessary to make sure pagination properties are respected at the cell's final position (and to make sure line boxes can't straddle page breaks).
 *
 * Revision 1.23  2007/05/10 00:39:38  peterbrant
 * Anonymous block boxes were always being skipped when collapsing margins
 *
 * Revision 1.22  2007/03/12 21:11:20  peterbrant
 * Documentation update
 *
 * Revision 1.21  2007/02/07 16:33:24  peterbrant
 * Initial commit of rewritten table support and associated refactorings
 *
 * Revision 1.20  2006/09/08 15:41:57  peterbrant
 * Calculate containing block width accurately when collapsing margins / Provide collapsed bottom
 * margin to floats / Revive :first-line and :first-letter / Minor simplication in InlineBoxing
 * (get rid of now-superfluous InlineBoxInfo)
 *
 * Revision 1.19  2006/09/01 23:49:38  peterbrant
 * Implement basic margin collapsing / Various refactorings in preparation for shrink-to-fit / Add hack to treat auto margins as zero
 *
 * Revision 1.18  2006/08/29 17:29:13  peterbrant
 * Make Style object a thing of the past
 *
 * Revision 1.17  2006/08/27 00:36:39  peterbrant
 * Initial commit of (initial) R7 work
 *
 * Revision 1.16  2006/02/22 02:20:18  peterbrant
 * Links and hover work again
 *
 * Revision 1.15  2005/11/25 16:57:19  peterbrant
 * Initial commit of inline content refactoring
 *
 * Revision 1.14  2005/11/12 21:55:27  tobega
 * Inline enhancements: block box text decorations, correct line-height when it is a number, better first-letter handling
 *
 * Revision 1.13  2005/11/05 03:29:59  peterbrant
 * Start work on painting order and improved positioning implementation
 *
 * Revision 1.12  2005/01/29 20:24:24  pdoubleya
 * Clean/reformat code. Removed commented blocks, checked copyright.
 *
 * Revision 1.11  2005/01/07 00:29:29  tobega
 * Removed Content reference from Box (mainly to reduce memory footprint). In the process stumbled over and cleaned up some messy stuff.
 *
 * Revision 1.10  2005/01/05 01:10:15  tobega
 * Went wild with code analysis tool. removed unused stuff. Lucky we have CVS...
 *
 * Revision 1.9  2004/12/12 03:32:59  tobega
 * Renamed x and u to avoid confusing IDE. But that got cvs in a twist. See if this does it
 *
 * Revision 1.8  2004/12/11 23:36:49  tobega
 * Progressing on cleaning up layout and boxes. Still broken, won't even compile at the moment. Working hard to fix it, though.
 *
 * Revision 1.7  2004/12/10 06:51:04  tobega
 * Shamefully, I must now check in painfully broken code. Good news is that Layout is much nicer, and we also handle :before and :after, and do :first-line better than before. Table stuff must be brought into line, but most needed is to fix Render. IMO Render should work with Boxes and Content. If Render goes for a node, that is wrong.
 *
 * Revision 1.6  2004/12/05 19:42:44  tobega
 * Made recursion in InlineUtil easier to understand
 *
 * Revision 1.5  2004/12/05 18:11:38  tobega
 * Now uses style cache for pseudo-element styles. Also started preparing to replace inline node handling with inline content handling.
 *
 * Revision 1.4  2004/12/05 00:48:58  tobega
 * Cleaned up so that now all property-lookups use the CalculatedStyle. Also added support for relative values of top, left, width, etc.
 *
 * Revision 1.3  2004/10/23 13:50:26  pdoubleya
 * Re-formatted using JavaStyle tool.
 * Cleaned imports to resolve wildcards except for common packages (java.io, java.util, etc).
 * Added CVS log comments at bottom.
 *
 *
 */