Java tutorial
/* * * This file is part of the iText (R) project. Copyright (c) 1998-2019 iText Group NV * Authors: Bruno Lowagie, Paulo Soares, et al. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License version 3 * as published by the Free Software Foundation with the addition of the * following permission added to Section 15 as permitted in Section 7(a): * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY * ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT * OF THIRD PARTY RIGHTS * * 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 Affero General Public License for more details. * You should have received a copy of the GNU Affero General Public License * along with this program; if not, see http://www.gnu.org/licenses or write to * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, * Boston, MA, 02110-1301 USA, or download the license from the following URL: * http://itextpdf.com/terms-of-use/ * * The interactive user interfaces in modified source and object code versions * of this program must display Appropriate Legal Notices, as required under * Section 5 of the GNU Affero General Public License. * * In accordance with Section 7(b) of the GNU Affero General Public License, * a covered work must retain the producer line in every PDF that is created * or manipulated using iText. * * You can be released from the requirements of the license by purchasing * a commercial license. Buying such a license is mandatory as soon as you * develop commercial activities involving the iText software without * disclosing the source code of your own applications. * These activities include: offering paid services to customers as an ASP, * serving PDFs on the fly in a web application, shipping iText with a closed * source product. * * For more information, please contact iText Software Corp. at this * address: sales@itextpdf.com */ package com.itextpdf.text.pdf; import com.itextpdf.awt.geom.AffineTransform; import com.itextpdf.text.Rectangle; /** * <CODE>PdfRectangle</CODE> is the PDF Rectangle object. * <P> * Rectangles are used to describe locations on the page and bounding boxes for several * objects in PDF, such as fonts. A rectangle is represented as an <CODE>array</CODE> of * four numbers, specifying the lower left <I>x</I>, lower left <I>y</I>, upper right <I>x</I>, * and upper right <I>y</I> coordinates of the rectangle, in that order.<BR> * This object is described in the 'Portable Document Format Reference Manual version 1.3' * section 7.1 (page 183). * * @see com.itextpdf.text.Rectangle * @see PdfArray */ public class PdfRectangle extends NumberArray { // membervariables /** lower left x */ private float llx = 0; /** lower left y */ private float lly = 0; /** upper right x */ private float urx = 0; /** upper right y */ private float ury = 0; // constructors /** * Constructs a <CODE>PdfRectangle</CODE>-object. * * @param llx lower left x * @param lly lower left y * @param urx upper right x * @param ury upper right y * * @since rugPdf0.10 */ public PdfRectangle(float llx, float lly, float urx, float ury, int rotation) { super(); if (rotation == 90 || rotation == 270) { this.llx = lly; this.lly = llx; this.urx = ury; this.ury = urx; } else { this.llx = llx; this.lly = lly; this.urx = urx; this.ury = ury; } super.add(new PdfNumber(this.llx)); super.add(new PdfNumber(this.lly)); super.add(new PdfNumber(this.urx)); super.add(new PdfNumber(this.ury)); } public PdfRectangle(float llx, float lly, float urx, float ury) { this(llx, lly, urx, ury, 0); } /** * Constructs a <CODE>PdfRectangle</CODE>-object starting from the origin (0, 0). * * @param urx upper right x * @param ury upper right y */ public PdfRectangle(float urx, float ury, int rotation) { this(0, 0, urx, ury, rotation); } public PdfRectangle(float urx, float ury) { this(0, 0, urx, ury, 0); } /** * Constructs a <CODE>PdfRectangle</CODE>-object with a <CODE>Rectangle</CODE>-object. * * @param rectangle a <CODE>Rectangle</CODE> */ public PdfRectangle(Rectangle rectangle, int rotation) { this(rectangle.getLeft(), rectangle.getBottom(), rectangle.getRight(), rectangle.getTop(), rotation); } public PdfRectangle(Rectangle rectangle) { this(rectangle.getLeft(), rectangle.getBottom(), rectangle.getRight(), rectangle.getTop(), 0); } // methods /** * Returns the high level version of this PdfRectangle * @return this PdfRectangle translated to class Rectangle */ public Rectangle getRectangle() { return new Rectangle(left(), bottom(), right(), top()); } /** * Overrides the <CODE>add</CODE>-method in <CODE>PdfArray</CODE> in order to prevent the adding of extra object to the array. * * @param object <CODE>PdfObject</CODE> to add (will not be added here) * @return <CODE>false</CODE> */ public boolean add(PdfObject object) { return false; } /** * Block changes to the underlying PdfArray * @param values stuff we'll ignore. Ha! * @return false. You can't add anything to a PdfRectangle * @since 2.1.5 */ public boolean add(float values[]) { return false; } /** * Block changes to the underlying PdfArray * @param values stuff we'll ignore. Ha! * @return false. You can't add anything to a PdfRectangle * @since 2.1.5 */ public boolean add(int values[]) { return false; } /** * Block changes to the underlying PdfArray * @param object Ignored. * @since 2.1.5 */ public void addFirst(PdfObject object) { } /** * Returns the lower left x-coordinate. * * @return the lower left x-coordinate */ public float left() { return llx; } /** * Returns the upper right x-coordinate. * * @return the upper right x-coordinate */ public float right() { return urx; } /** * Returns the upper right y-coordinate. * * @return the upper right y-coordinate */ public float top() { return ury; } /** * Returns the lower left y-coordinate. * * @return the lower left y-coordinate */ public float bottom() { return lly; } /** * Returns the lower left x-coordinate, considering a given margin. * * @param margin a margin * @return the lower left x-coordinate */ public float left(int margin) { return llx + margin; } /** * Returns the upper right x-coordinate, considering a given margin. * * @param margin a margin * @return the upper right x-coordinate */ public float right(int margin) { return urx - margin; } /** * Returns the upper right y-coordinate, considering a given margin. * * @param margin a margin * @return the upper right y-coordinate */ public float top(int margin) { return ury - margin; } /** * Returns the lower left y-coordinate, considering a given margin. * * @param margin a margin * @return the lower left y-coordinate */ public float bottom(int margin) { return lly + margin; } /** * Returns the width of the rectangle. * * @return a width */ public float width() { return urx - llx; } /** * Returns the height of the rectangle. * * @return a height */ public float height() { return ury - lly; } /** * Swaps the values of urx and ury and of lly and llx in order to rotate the rectangle. * * @return a <CODE>PdfRectangle</CODE> */ public PdfRectangle rotate() { return new PdfRectangle(lly, llx, ury, urx, 0); } public PdfRectangle transform(AffineTransform transform) { float[] pts = { llx, lly, urx, ury }; transform.transform(pts, 0, pts, 0, 2); float[] dstPts = { pts[0], pts[1], pts[2], pts[3] }; if (pts[0] > pts[2]) { dstPts[0] = pts[2]; dstPts[2] = pts[0]; } if (pts[1] > pts[3]) { dstPts[1] = pts[3]; dstPts[3] = pts[1]; } return new PdfRectangle(dstPts[0], dstPts[1], dstPts[2], dstPts[3]); } }