pdfcell.java

一个java操作pdf文件的开发包,很好用的.

/*
 * $Id: PdfCell.java,v 1.55 2002/11/19 08:33:35 blowagie Exp $
 * $Name:  $
 *
 * Copyright 1999, 2000, 2001, 2002 Bruno Lowagie
 *
 * 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 'iText, a free JAVA-PDF library'.
 *
 * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
 * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
 * All Rights Reserved.
 * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
 * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
 *
 * Contributor(s): all the names of the contributors are added in the source code
 * where applicable.
 *
 * Alternatively, the contents of this file may be used under the terms of the
 * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
 * provisions of LGPL are applicable instead of those above.  If you wish to
 * allow use of your version of this file only under the terms of the LGPL
 * License and not to allow others to use your version of this file under
 * the MPL, indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by the LGPL.
 * If you do not delete the provisions above, a recipient may use your version
 * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the MPL as stated above or under the terms of the GNU
 * Library General Public License as published by the Free Software Foundation;
 * either version 2 of the License, or any later version.
 *
 * This library 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 Library general Public License for more
 * details.
 *
 * If you didn't download this code from the following link, you should check if
 * you aren't using an obsolete version:
 * http://www.lowagie.com/iText/
 */

package com.lowagie.text.pdf;

import java.util.ArrayList;
import java.util.Iterator;

import com.lowagie.text.*;

/**
 * A <CODE>PdfCell</CODE> is the PDF translation of a <CODE>Cell</CODE>.
 * <P>
 * A <CODE>PdfCell</CODE> is an <CODE>ArrayList</CODE> of <CODE>PdfLine</CODE>s.
 *
 * @see		com.lowagie.text.Rectangle
 * @see		com.lowagie.text.Cell
 * @see		PdfLine
 * @see		PdfTable
 */

public class PdfCell extends Rectangle {
    
    // membervariables
    
    /** These are the PdfLines in the Cell. */
    private ArrayList lines;
    
    /** These are the PdfLines in the Cell. */
    private PdfLine line;
    
    /** These are the Images in the Cell. */
    private ArrayList images;
    
    /** This is the leading of the lines. */
    private float leading;
    
    /** This is the number of the row the cell is in. */
    private int rownumber;
    
    /** This is the rowspan of the cell. */
    private int rowspan;
    
    /** This is the cellspacing of the cell. */
    private float cellspacing;
    
    /** This is the cellpadding of the cell. */
    private float cellpadding;
    
    /** Indicates if this cell belongs to the header of a <CODE>PdfTable</CODE> */
    private boolean header = false;
    
    
    // constructors
    
    /**
     * Constructs a <CODE>PdfCell</CODE>-object.
     *
     * @param	cell		the original <CODE>Cell</CODE>
     * @param	rownumber	the number of the <CODE>Row</CODE> the <CODE>Cell</CODE> was in.
     * @param	left		the left border of the <CODE>PdfCell</CODE>
     * @param	right		the right border of the <CODE>PdfCell</CODE>
     * @param	top			the top border of the <CODE>PdfCell</CODE>
     * @param	cellspacing	the cellspacing of the <CODE>Table</CODE>
     * @param	cellpadding	the cellpadding	of the <CODE>Table</CODE>
     */
    
    public PdfCell(Cell cell, int rownumber, float left, float right, float top, float cellspacing, float cellpadding) {
        // constructs a Rectangle (the bottomvalue will be changed afterwards)
        super(left, top, right, top);
        // copying the attributes from class Cell
        setBorder(cell.border());
        setBorderWidth(cell.borderWidth());
        setBorderColor(cell.borderColor());
        setBackgroundColor(cell.backgroundColor());
        setGrayFill(cell.grayFill());
        
        // initialisation of some parameters
        PdfChunk chunk;
        Element element;
        PdfChunk overflow;
        lines = new ArrayList();
        images = new ArrayList();
        leading = cell.leading();
        int alignment = cell.horizontalAlignment();
        left += cellspacing + cellpadding;
        right -= cellspacing + cellpadding;
        
        float height = leading + cellpadding;
        float rowSpan = (float)cell.rowspan();
        
        switch(cell.verticalAlignment()) {
            case Element.ALIGN_BOTTOM:
                height *= rowSpan;
                break;
            case Element.ALIGN_MIDDLE:
                height *= (rowSpan / 1.5);
                break;
            default:
                height -= cellpadding * 0.4f;
        }
        
        line = new PdfLine(left, right, alignment, height);
        
        ArrayList allActions;
        int aCounter;
        // we loop over all the elements of the cell
        for (Iterator i = cell.getElements(); i.hasNext(); ) {
            element = (Element) i.next();
            switch(element.type()) {
                case Element.JPEG:
                case Element.IMGRAW:
                case Element.IMGTEMPLATE:
                case Element.GIF:
                case Element.PNG:
                    height = addImage((Image)element, left, right, height, alignment);
                    break;
                    // if the element is a list
                case Element.LIST:
                    if (line.size() > 0) {
                        line.resetAlignment();
                        lines.add(line);
                    }
                    allActions = new ArrayList();
                    processActions(element, null, allActions);
                    aCounter = 0;
                    ListItem item;
                    // we loop over all the listitems
                    for (Iterator items = ((List)element).getItems().iterator(); items.hasNext(); ) {
                        item = (ListItem) items.next();
                        line = new PdfLine(left + item.indentationLeft(), right, alignment, leading);
                        line.setListItem(item);
                        for (Iterator j = item.getChunks().iterator(); j.hasNext(); ) {
                            chunk = new PdfChunk((Chunk) j.next(), (PdfAction)(allActions.get(aCounter++)));
                            while ((overflow = line.add(chunk)) != null) {
                                lines.add(line);
                                line = new PdfLine(left + item.indentationLeft(), right, alignment, leading);
                                chunk = overflow;
                            }
                            line.resetAlignment();
                            lines.add(line);
                            line = new PdfLine(left + item.indentationLeft(), right, alignment, leading);
                        }
                    }
                    line = new PdfLine(left, right, alignment, leading);
                    break;
                    // if the element is something else
                default:
                    allActions = new ArrayList();
                    processActions(element, null, allActions);
                    aCounter = 0;
                    // we loop over the chunks
                    for (Iterator j = element.getChunks().iterator(); j.hasNext(); ) {
                        Chunk c = (Chunk) j.next();
                        chunk = new PdfChunk(c, (PdfAction)(allActions.get(aCounter++)));
                        while ((overflow = line.add(chunk)) != null) {
                            lines.add(line);
                            line = new PdfLine(left, right, alignment, leading);
                            chunk = overflow;
                        }
                    }
                    // if the element is a paragraph, section or chapter, we reset the alignment and add the line
                    switch (element.type()) {
                        case Element.PARAGRAPH:
                        case Element.SECTION:
                        case Element.CHAPTER:
                            line.resetAlignment();
                            lines.add(line);
                            line = new PdfLine(left, right, alignment, leading);
                    }
            }
        }
        if (line.size() > 0) {
            lines.add(line);
        }
        // we set some additional parameters
        setBottom(top - leading * (lines.size() - 1) - cellpadding - height - 2 * cellspacing);
        this.cellpadding = cellpadding;
        this.cellspacing = cellspacing;
        
        rowspan = cell.rowspan();
        this.rownumber = rownumber;
    }
    
    // overriding of the Rectangle methods
    
    /**
     * Returns the lower left x-coordinaat.
     *
     * @return		the lower left x-coordinaat
     */
    
    public float left() {
        return super.left(cellspacing);
    }
    
    /**
     * Returns the upper right x-coordinate.
     *
     * @return		the upper right x-coordinate
     */
    
    public float right() {
        return super.right(cellspacing);
    }
    
    /**
     * Returns the upper right y-coordinate.
     *
     * @return		the upper right y-coordinate
     */
    
    public float top() {
        return super.top(cellspacing);
    }
    
    /**
     * Returns the lower left y-coordinate.
     *
     * @return		the lower left y-coordinate
     */
    
    public float bottom() {
        return super.bottom(cellspacing);
    }
    
    // methods
    
    /**
     * Adds an image to this Cell.
     *
     * @param   image   the image to add
     * @param   left    the left border
     * @param   right   the right border
     */
    
    private float addImage(Image imageOrg, float left, float right, float height, int alignment) {
        Image image = Image.getInstance(imageOrg);
        if (image.scaledWidth() > right - left) {
            image.scaleToFit(right - left, Float.MAX_VALUE);
        }
        if (line.size() != 0) lines.add(line);
        line = new PdfLine(left, right, alignment, image.scaledHeight() + 0.4f * leading);
        lines.add(line);
        line = new PdfLine(left, right, alignment, leading);
        switch (image.alignment() & Image.MIDDLE) {
            case Image.RIGHT:
                left = right - image.scaledWidth();
                break;