pdfprow.java

一个java操作pdf文件的开发包,很好用的.

/*
 * $Id: PdfPRow.java,v 1.32 2002/11/19 08:33:38 blowagie Exp $
 * $Name:  $
 *
 * Copyright 2001, 2002 Paulo Soares
 *
 * 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 com.lowagie.text.ExceptionConverter;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Element;
import com.lowagie.text.Rectangle;
import java.awt.Color;

/**
 * A row in a PdfPTable.
 *
 * @author  Paulo Soares
 */

public class PdfPRow {

    protected PdfPCell cells[];
    protected float maxHeight = 0;
    protected boolean calculated = false;

    public PdfPRow(PdfPCell cells[])
    {
        this.cells = cells;
    }
    
    public PdfPRow(PdfPRow row)
    {
        maxHeight = row.maxHeight;
        calculated = row.calculated;
        cells = new PdfPCell[row.cells.length];
        for (int k = 0; k < cells.length; ++k) {
            if (row.cells[k] != null)
                cells[k] = new PdfPCell(row.cells[k]);
        }
    }
    
    public boolean setWidths(float widths[])
    {
        if (widths.length != cells.length)
            return false;
        float total = 0;
        calculated = false;
        for (int k = 0; k < widths.length; ++k) {
            PdfPCell cell = cells[k];
            cell.setLeft(total);
            int last = k + cell.getColspan();
            for (; k < last; ++k)
                total += widths[k];
            --k;
            cell.setRight(total);
            cell.setTop(0);
        }
        return true;
    }
    
    public float calculateHeights()
    {
        maxHeight = 0;
        for (int k = 0; k < cells.length; ++k) {
            PdfPCell cell = cells[k];
            if (cell == null)
                continue;
            PdfPTable table = cell.getTable();
            if (table == null ) {
                float rightLimit = cell.isNoWrap() ? 20000 : cell.right() - cell.getPaddingRight();
                ColumnText ct = new ColumnText(null);
                ct.setSimpleColumn(cell.getPhrase(),
                    cell.left() + cell.getPaddingLeft(),
                    cell.top() - cell.getPaddingTop(),
                    rightLimit,
                    -20000,
                    0, cell.getHorizontalAlignment());
                ct.setLeading(cell.getLeading(), cell.getMultipliedLeading());
                ct.setIndent(cell.getIndent());
                ct.setExtraParagraphSpace(cell.getExtraParagraphSpace());
                ct.setFollowingIndent(cell.getFollowingIndent());
                ct.setRightIndent(cell.getRightIndent());
                ct.setRunDirection(cell.getRunDirection());
                try {
                    ct.go(true);
                }
                catch (DocumentException e) {
                    throw new ExceptionConverter(e);
                }
                float yLine = ct.getYLine();
                cell.setBottom(yLine - cell.getPaddingBottom());
            }
            else {
                table.setTotalWidth(cell.right() - cell.getPaddingRight() - cell.getPaddingLeft() - cell.left());
                cell.setBottom(cell.top() - cell.getPaddingTop() - cell.getPaddingBottom() - table.getTotalHeight());
            }
            float height = cell.getFixedHeight();
            if (height <= 0)
                height = cell.height();
            if (height < cell.getFixedHeight())
                height = cell.getFixedHeight();
            else if (height < cell.getMinimumHeight())
                height = cell.getMinimumHeight();
            if (height > maxHeight)
                maxHeight = height;
        }
        calculated = true;
        return maxHeight;
    }

    public void writeBorderAndBackgroung(float xPos, float yPos, PdfPCell cell, PdfContentByte[] canvases)
    {
        PdfContentByte lines = canvases[PdfPTable.LINECANVAS];
        PdfContentByte backgr = canvases[PdfPTable.BACKGROUNDCANVAS];
        // the coordinates of the border are retrieved
        float x1 = cell.left() + xPos;
        float y1 = cell.top() + yPos;
        float x2 = cell.right() + xPos;
        float y2 = y1 - maxHeight;

        // the backgroundcolor is set
        Color background = cell.backgroundColor();
        if (background != null) {
            backgr.setColorFill(background);
            backgr.rectangle(x1, y1, x2 - x1, y2 - y1);
            backgr.fill();
        }
        else if (cell.grayFill() > 0) {
            backgr.setGrayFill(cell.grayFill());
            backgr.rectangle(x1, y1, x2 - x1, y2 - y1);
            backgr.fill();
        }
        // if the element hasn't got any borders, nothing is added
        if (cell.hasBorders()) {

            // the width is set to the width of the element
            if (cell.borderWidth() != Rectangle.UNDEFINED) {
                lines.setLineWidth(cell.borderWidth());
            }

            // the color is set to the color of the element
            Color color = cell.borderColor();
            if (color != null) {
                lines.setColorStroke(color);
            }

            // if the box is a rectangle, it is added as a rectangle
            if (cell.hasBorder(Rectangle.BOX)) {
                lines.rectangle(x1, y1, x2 - x1, y2 - y1);
            }
            // if the border isn't a rectangle, the different sides are added apart
            else {
                if (cell.hasBorder(Rectangle.RIGHT)) {
                    lines.moveTo(x2, y1);
                    lines.lineTo(x2, y2);
                }
                if (cell.hasBorder(Rectangle.LEFT)) {
                    lines.moveTo(x1, y1);
                    lines.lineTo(x1, y2);
                }
                if (cell.hasBorder(Rectangle.BOTTOM)) {
                    lines.moveTo(x1, y2);
                    lines.lineTo(x2, y2);
                }
                if (cell.hasBorder(Rectangle.TOP)) {
                    lines.moveTo(x1, y1);
                    lines.lineTo(x2, y1);
                }
            }
            lines.stroke();
            if (color != null) {
                lines.resetRGBColorStroke();
            }
        }            
    }
    
    public void writeCells(float xPos, float yPos, PdfContentByte[] canvases)
    {
        if (!calculated)
            calculateHeights();
        for (int k = 0; k < cells.length; ++k) {
            PdfPCell cell = cells[k];
            if (cell == null)
                continue;
            writeBorderAndBackgroung(xPos, yPos, cell, canvases);
            PdfPTable table = cell.getTable();
            float tly = 0;
            boolean alignTop = false;
            switch (cell.getVerticalAlignment()) {
                case Element.ALIGN_BOTTOM:
                    tly = cell.top() + yPos - maxHeight + cell.height() - cell.getPaddingTop();
                    break;
                case Element.ALIGN_MIDDLE:
                    tly = cell.top() + yPos + (cell.height() - maxHeight) / 2 - cell.getPaddingTop();
                    break;
                default:
                    alignTop = true;
                    tly = cell.top() + yPos - cell.getPaddingTop();
                    break;
            }
            if (table == null) {
                float fixedHeight = cell.getFixedHeight();
                float rightLimit = cell.right() + xPos - cell.getPaddingRight();
                float leftLimit = cell.left() + xPos + cell.getPaddingLeft();
                if (cell.isNoWrap()) {
                    switch (cell.getHorizontalAlignment()) {
                        case Element.ALIGN_CENTER:
                            rightLimit += 10000;
                            leftLimit -= 10000;
                            break;
                        case Element.ALIGN_RIGHT:
                            leftLimit -= 20000;
                            break;
                        default:
                            rightLimit += 20000;
                            break;
                    }
                }
                ColumnText ct = new ColumnText(canvases[PdfPTable.TEXTCANVAS]);
                float bry = -20000;
                if (fixedHeight > 0) {
                    if (cell.height() > maxHeight) {
                        tly = cell.top() + yPos - cell.getPaddingTop();
                        bry = cell.top() + yPos - maxHeight + cell.getPaddingBottom();
                    }
                }
                ct.setSimpleColumn(cell.getPhrase(),
                    leftLimit,
                    tly,
                    rightLimit,
                    bry,
                    0, cell.getHorizontalAlignment());
                ct.setLeading(cell.getLeading(), cell.getMultipliedLeading());
                ct.setIndent(cell.getIndent());
                ct.setExtraParagraphSpace(cell.getExtraParagraphSpace());
                ct.setFollowingIndent(cell.getFollowingIndent());
                ct.setRightIndent(cell.getRightIndent());
                ct.setSpaceCharRatio(cell.getSpaceCharRatio());
                ct.setRunDirection(cell.getRunDirection());
                try {
                    ct.go();
                }
                catch (DocumentException e) {
                    throw new ExceptionConverter(e);
                }
            }
            else {
                float remainingHeight = 0;
                float maxLastRow = 0;
                if (alignTop) {
                    //add by Jin-Hsia Yang, to add remaining height to last row
                    if (table.size() > 0) {
                        PdfPRow row = table.getRow(table.size()-1);
                        remainingHeight = maxHeight-table.getTotalHeight()-cell.getPaddingBottom()-cell.getPaddingTop();
                        if (remainingHeight > 0) {
                            maxLastRow = row.getMaxHeights();
                            row.setMaxHeights(row.getMaxHeights()+ remainingHeight );
                            //table.setTotalHeight(table.getTotalHeight() + remainingHeight);
                        }
                    }
                    //end add
                }

                table.writeSelectedRows(0, -1, cell.left() + xPos + cell.getPaddingLeft(),
                    tly, canvases);
                if (alignTop && remainingHeight > 0)
                    table.getRow(table.size()-1).setMaxHeights(maxLastRow);
            }
        }
    }
    
    public boolean isCalculated()
    {
        return calculated;
    }
    
    public float getMaxHeights()
    {
        if (calculated)
            return maxHeight;
        else
            return calculateHeights();
    }
    
    //add by Jin-Hsia Yang
    public void setMaxHeights(float maxHeight) {
	this.maxHeight=maxHeight;
    }
    //end add
    
    float[] getEventWidth(float xPos) {
        int n = 0;
        for (int k = 0; k < cells.length; ++k) {
            if (cells[k] != null)
                ++n;
        }
        float width[] = new float[n + 1];
        n = 0;
        width[n++] = xPos;
        for (int k = 0; k < cells.length; ++k) {
            if (cells[k] != null) {
                width[n] = width[n - 1] + cells[k].width();
                ++n;
            }
        }
        return width;
    }
}