Container for column areas

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@193892 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 175 insertions, 0 deletions

diff --git a/src/org/apache/fop/layout/SpanArea.java b/src/org/apache/fop/layout/SpanArea.java
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+++ b/src/org/apache/fop/layout/SpanArea.java
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+/*-- $Id$ -- 
+
+ ============================================================================
+                   The Apache Software License, Version 1.1
+ ============================================================================
+ 
+    Copyright (C) 1999 The Apache Software Foundation. All rights reserved.
+ 
+ Redistribution and use in source and binary forms, with or without modifica-
+ tion, are permitted provided that the following conditions are met:
+ 
+ 1. Redistributions of  source code must  retain the above copyright  notice,
+    this list of conditions and the following disclaimer.
+ 
+ 2. Redistributions in binary form must reproduce the above copyright notice,
+    this list of conditions and the following disclaimer in the documentation
+    and/or other materials provided with the distribution.
+ 
+ 3. The end-user documentation included with the redistribution, if any, must
+    include  the following  acknowledgment:  "This product includes  software
+    developed  by the  Apache Software Foundation  (http://www.apache.org/)."
+    Alternately, this  acknowledgment may  appear in the software itself,  if
+    and wherever such third-party acknowledgments normally appear.
+ 
+ 4. The names "Fop" and  "Apache Software Foundation"  must not be used to
+    endorse  or promote  products derived  from this  software without  prior
+    written permission. For written permission, please contact
+    apache@apache.org.
+ 
+ 5. Products  derived from this software may not  be called "Apache", nor may
+    "Apache" appear  in their name,  without prior written permission  of the
+    Apache Software Foundation.
+ 
+ THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
+ INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ FITNESS  FOR A PARTICULAR  PURPOSE ARE  DISCLAIMED.  IN NO  EVENT SHALL  THE
+ APACHE SOFTWARE  FOUNDATION  OR ITS CONTRIBUTORS  BE LIABLE FOR  ANY DIRECT,
+ INDIRECT, INCIDENTAL, SPECIAL,  EXEMPLARY, OR CONSEQUENTIAL  DAMAGES (INCLU-
+ DING, BUT NOT LIMITED TO, PROCUREMENT  OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ OF USE, DATA, OR  PROFITS; OR BUSINESS  INTERRUPTION)  HOWEVER CAUSED AND ON
+ ANY  THEORY OF LIABILITY,  WHETHER  IN CONTRACT,  STRICT LIABILITY,  OR TORT
+ (INCLUDING  NEGLIGENCE OR  OTHERWISE) ARISING IN  ANY WAY OUT OF THE  USE OF
+ THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ 
+ This software  consists of voluntary contributions made  by many individuals
+ on  behalf of the Apache Software  Foundation and was  originally created by
+ James Tauber <jtauber@jtauber.com>. For more  information on the Apache 
+ Software Foundation, please see <http://www.apache.org/>.
+ 
+ */
+package org.apache.fop.layout;
+
+// FOP
+import org.apache.fop.render.Renderer;
+import org.apache.fop.fo.properties.Position;
+import org.apache.fop.datatypes.IDReferences;
+
+// Java
+import java.util.Vector;
+import java.util.Enumeration;
+
+public class SpanArea extends AreaContainer {
+	
+	private int columnCount;
+	private int currentColumn = 1;
+	private int columnGap = 0;
+	
+	// has the area been balanced?
+	private boolean isBalanced = false;
+	
+    public SpanArea(FontState fontState, int xPosition, int yPosition,
+		int allocationWidth, int maxHeight,
+		int columnCount, int columnGap) {
+		super(fontState, xPosition, yPosition, allocationWidth,
+			maxHeight, Position.ABSOLUTE);
+
+		this.contentRectangleWidth = allocationWidth;
+		this.columnCount = columnCount;
+		this.columnGap = columnGap;
+	
+		int columnWidth =
+			(allocationWidth - columnGap*(columnCount-1)) / columnCount;
+		for (int columnIndex = 0; columnIndex < columnCount; columnIndex++)
+		{
+			int colXPosition = (xPosition + columnIndex*(columnWidth + columnGap));
+			int colYPosition = yPosition;
+			ColumnArea colArea = new ColumnArea(fontState, colXPosition, colYPosition,
+				columnWidth, maxHeight, columnCount);
+			addChild(colArea);
+			colArea.setColumnIndex(columnIndex+1);
+		}
+    }
+
+    public void render(Renderer renderer) {
+	renderer.renderSpanArea(this);
+    }
+
+    public void end() {
+    }
+
+    public void start() {
+    }
+
+    public int spaceLeft() {
+	return maxHeight - currentHeight;
+    }
+	
+	public int getColumnCount()
+	{
+		return columnCount;
+	}
+	
+	public int getCurrentColumn()
+	{
+		return currentColumn;
+	}
+	
+	public void setCurrentColumn(int currentColumn)
+	{
+		if (currentColumn <= columnCount)
+			this.currentColumn = currentColumn;
+		else
+			this.currentColumn = columnCount;
+	}
+	
+	public AreaContainer getCurrentColumnArea()
+	{
+		return (AreaContainer)getChildren().elementAt(currentColumn-1);
+	}
+	
+	public boolean isBalanced()
+	{
+		return isBalanced;
+	}
+	
+	public void setIsBalanced()
+	{
+		this.isBalanced = true;
+	}
+	
+	public int getTotalContentHeight()
+	{
+		int totalContentHeight = 0;
+		for (Enumeration e = getChildren().elements(); e.hasMoreElements(); )
+		{
+			totalContentHeight += ((AreaContainer)e.nextElement()).getContentHeight();
+		}
+		return totalContentHeight;
+	}
+	
+	public int getMaxContentHeight()
+	{
+		int maxContentHeight = 0;
+		for (Enumeration e = getChildren().elements(); e.hasMoreElements(); )
+		{
+			AreaContainer nextElm = (AreaContainer)e.nextElement();
+			if (nextElm.getContentHeight() > maxContentHeight)
+				maxContentHeight = nextElm.getContentHeight();
+		}
+		return maxContentHeight;
+	}
+	
+    public void setPage(Page page) {
+		this.page = page;
+		for (Enumeration e = getChildren().elements(); e.hasMoreElements(); )
+		{
+			((AreaContainer)e.nextElement()).setPage(page);
+		}
+    }
+	
+	public boolean isLastColumn()
+	{
+		return (currentColumn == columnCount);
+	}
+}