001 /* ShapeGraphicAttribute.java 002 Copyright (C) 2003 Free Software Foundation, Inc. 003 004 This file is part of GNU Classpath. 005 006 GNU Classpath is free software; you can redistribute it and/or modify 007 it under the terms of the GNU General Public License as published by 008 the Free Software Foundation; either version 2, or (at your option) 009 any later version. 010 011 GNU Classpath is distributed in the hope that it will be useful, but 012 WITHOUT ANY WARRANTY; without even the implied warranty of 013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014 General Public License for more details. 015 016 You should have received a copy of the GNU General Public License 017 along with GNU Classpath; see the file COPYING. If not, write to the 018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 019 02110-1301 USA. 020 021 Linking this library statically or dynamically with other modules is 022 making a combined work based on this library. Thus, the terms and 023 conditions of the GNU General Public License cover the whole 024 combination. 025 026 As a special exception, the copyright holders of this library give you 027 permission to link this library with independent modules to produce an 028 executable, regardless of the license terms of these independent 029 modules, and to copy and distribute the resulting executable under 030 terms of your choice, provided that you also meet, for each linked 031 independent module, the terms and conditions of the license of that 032 module. An independent module is a module which is not derived from 033 or based on this library. If you modify this library, you may extend 034 this exception to your version of the library, but you are not 035 obligated to do so. If you do not wish to do so, delete this 036 exception statement from your version. */ 037 038 039 package java.awt.font; 040 041 import java.awt.Graphics2D; 042 import java.awt.Shape; 043 import java.awt.geom.Rectangle2D; 044 045 /** 046 * This is an implementation of GraphicAttribute that draws shapes in a TextLayout. 047 * 048 * @author Lillian Angel (langel at redhat dot com) 049 */ 050 public final class ShapeGraphicAttribute extends GraphicAttribute 051 { 052 /** True if the shape should be filled. */ 053 public static final boolean FILL = false; 054 055 /** True if the shape should be stroked with a 1-pixel wide stroke. */ 056 public static final boolean STROKE = true; 057 058 private Shape shape; 059 private boolean stroke; 060 private Rectangle2D bounds; 061 062 /** 063 * Constructor. 064 * 065 * @param shape - the Shape to render. The Shape is rendered with its origin. 066 * @param alignment - the alignment 067 * @param stroke - true if the Shape should be stroked; false if the Shape 068 * should be filled. 069 */ 070 public ShapeGraphicAttribute(Shape shape, int alignment, boolean stroke) 071 { 072 super(alignment); 073 this.shape = shape; 074 this.stroke = stroke; 075 this.bounds = shape.getBounds2D(); 076 } 077 078 /** 079 * Draws the graphic at the given location. 080 * 081 * @param graphics - the graphics to use. 082 * @param x - the x location to draw at. 083 * @param y - the y location to draw at. 084 */ 085 public void draw(Graphics2D graphics, float x, float y) 086 { 087 graphics.translate(x, y); 088 if (stroke == STROKE) 089 graphics.draw(shape); 090 else 091 graphics.fill(shape); 092 graphics.translate(- x, - y); 093 } 094 095 /** 096 * Compares this ShapeGraphicAttribute to obj. 097 * 098 * @param obj - the object to compare. 099 */ 100 public boolean equals(Object obj) 101 { 102 if (! (obj instanceof ShapeGraphicAttribute)) 103 return false; 104 105 return equals((ShapeGraphicAttribute) obj); 106 } 107 108 /** 109 * Compares this ShapeGraphicAttribute to rhs. 110 * 111 * @param rhs - the ShapeGraphicAttribute to compare. 112 */ 113 public boolean equals(ShapeGraphicAttribute rhs) 114 { 115 return (this == rhs || (this.shape.equals(rhs.shape) 116 && getAlignment() == rhs.getAlignment() 117 && stroke == rhs.stroke 118 && getAdvance() == rhs.getAdvance() 119 && getAscent() == rhs.getAscent() 120 && getBounds().equals(rhs.getBounds()) 121 && getDescent() == rhs.getDescent() 122 && hashCode() == rhs.hashCode())); 123 } 124 125 /** 126 * Gets the distance from the origin of its Shape to the right side of the 127 * bounds of its Shape. 128 * 129 * @return the advance 130 */ 131 public float getAdvance() 132 { 133 return Math.max(0, (float) bounds.getMaxX()); 134 } 135 136 /** 137 * Gets the positive distance from the origin of its Shape to the top of 138 * bounds. 139 * 140 * @return the ascent 141 */ 142 public float getAscent() 143 { 144 return Math.max(0, -(float) bounds.getMinY()); 145 } 146 147 /** 148 * Gets the distance from the origin of its Shape to the bottom of the bounds. 149 * 150 * @return the descent 151 */ 152 public float getDescent() 153 { 154 return Math.max(0, (float) bounds.getMaxY()); 155 } 156 157 /** 158 * Returns a Rectangle2D that encloses all of the bits drawn by this shape. 159 * 160 * @return the bounds of the shape. 161 */ 162 public Rectangle2D getBounds() 163 { 164 Rectangle2D.Float bounds = new Rectangle2D.Float(); 165 bounds.setRect(this.bounds); 166 167 if (stroke == STROKE) 168 { 169 bounds.width++; 170 bounds.height++; 171 } 172 173 return bounds; 174 } 175 176 /** 177 * Gets the hash code. 178 * 179 * @return the hash code. 180 */ 181 public int hashCode() 182 { 183 return shape.hashCode(); 184 } 185 }