AOO410/main/xmerge/source/pexcel/java/org/openoffice/xmerge/converter/xml/sxc/pexcel/records/Pane.java

/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/



package org.openoffice.xmerge.converter.xml.sxc.pexcel.records;

import java.io.OutputStream;
import java.io.InputStream;
import java.io.IOException;
import java.awt.Point;

import org.openoffice.xmerge.util.Debug;
import org.openoffice.xmerge.util.EndianConverter;
import org.openoffice.xmerge.converter.xml.sxc.pexcel.PocketExcelConstants;
import org.openoffice.xmerge.converter.xml.sxc.SheetSettings;

/**
 * Represents a BIFF Record that describes the number and position of unfrozen
 * panes.
 */
public class Pane implements BIFFRecord {

	private byte[] x		= new byte[2];
    private byte[] y		= new byte[2];
    private byte[] rwTop	= new byte[2];
    private byte[] colLeft	= new byte[2];
    private byte   pnnAcct;
   
   	/**
	 * Default Constructor 
	 */
	public Pane() {
    	pnnAcct = (byte) 0x02;	// Default setting
	}
	
	/**
 	 * Constructs a Pane Record from the <code>InputStream</code>
 	 *
 	 * @param	is InputStream containing a Pane record 
 	 */
    public Pane(InputStream is) throws IOException {
		read(is);	
    }

    /**
	 * Get the hex code for this particular <code>BIFFRecord</code> 
	 *
	 * @return the hex code for <code>Pane</code>
	 */
    public short getBiffType() {
        return PocketExcelConstants.PANE_INFO;
    }
	
    /**
	 * Gets the split point for this pane, in the case of splits this will be
	 * in twips.
	 *
	 * @return the split point
	 */
    public Point getSplitPoint() {

		int xTwips = EndianConverter.readShort(x)/11;
		int yTwips = EndianConverter.readShort(y)/15;
        return (new Point(xTwips, yTwips));
    }

    /**
	 * Gets the freeze point for this pane, in the case of freezes this will
	 * be a zero-based index to either the column or row.
	 *
	 * @return the freeze point
	 */
    public Point getFreezePoint() {

        return (new Point(EndianConverter.readShort(x),
		EndianConverter.readShort(y)));
    }
	
    /**
	 * Sets the split point for this pane, coordinates are in column row units
	 * if the split type is freeze or twips if split type is split.
	 *
	 * @param splitType contains the X and Y split types (freeze or split)
	 * @param p the split point
	 */
    public void setSplitPoint(Point splitType, Point p) {
	
		if(splitType.getX()==SheetSettings.SPLIT 
			|| splitType.getY()==SheetSettings.SPLIT) {
			int yTwips = (int) p.getY();
			short yPxl = (short) (yTwips * 15);
			y = EndianConverter.writeShort(yPxl);
			int xTwips = (int) p.getX();
			short xPxl = (short) (xTwips * 11);
			x = EndianConverter.writeShort(xPxl);
		} else {
			y = EndianConverter.writeShort((short) p.getY());
			x = EndianConverter.writeShort((short) p.getX());
		}

    } 	
	
    /**
	 * Get the hex code for this particular <code>BIFFRecord</code> 
	 *
	 * @return the hex code for <code>Pane</code>
	 */
    public void setPaneNumber(int paneNumber) {
        pnnAcct = (byte) paneNumber;
    }
	
    /**
	 * Get the pane number of the active pane 
	 * 0 - bottom right, 1 - top right
	 * 2 - bottom left, 3 - top left
	 *
	 * @return the hex code for <code>Pane</code>
	 */
    public int getPaneNumber() {
        return pnnAcct;
    }	

    /**
	 * Set the top row visible in the lower pane 
	 *
	 * @param top 0-based inex of the top row
	 */
    public void setTop(int top) {
        rwTop = EndianConverter.writeShort((short)top);
    }
	
    /**
	 * Set leftmost column visible in the right pane 
	 *
	 * @param left 0-based index of the leftmost column
	 */
    public void setLeft(int left) {
        colLeft = EndianConverter.writeShort((short)left);
    }
	
    /**
	 * Get the top row visible in the lower pane     
	 *
	 * @return the hex code for <code>Pane</code>
	 */
    public int getTop() {
        return EndianConverter.readShort(rwTop);
    }
	
    /**
	 * Get leftmost column visible in the right pane 
	 *
	 * @return 0-based index of the column 
	 */
    public int getLeft() {
        return EndianConverter.readShort(colLeft);
    }


	/** 
	 * Reads a <code>Pane</code> record from the <code>InputStream</code>
	 *
	 * @param input <code>InputStream</code> to read from 
	 * @return the total number of bytes read
	 */
    public int read(InputStream input) throws IOException {
		
        int numOfBytesRead	= input.read(x);
        numOfBytesRead		+= input.read(y);
        numOfBytesRead		+= input.read(rwTop);
        numOfBytesRead		+= input.read(colLeft);
		pnnAcct				= (byte) input.read();
        numOfBytesRead++;
        
        Debug.log(Debug.TRACE, "\tx : "+ EndianConverter.readShort(x) + 
                            " y : " + EndianConverter.readShort(y) +
                            " rwTop : " + EndianConverter.readShort(rwTop) +
                            " colLeft : " + EndianConverter.readShort(colLeft) +
                            " pnnAcct : " + pnnAcct);
        
        return numOfBytesRead;                
    }
    
    public void write(OutputStream output) throws IOException {

    	output.write(getBiffType());
		output.write(x);
    	output.write(y);
	    output.write(rwTop);
	    output.write(colLeft);
	    output.write(pnnAcct);

		Debug.log(Debug.TRACE,"Writing Pane record");
    }
}