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| 1 | /* | ||
| 2 | * Copyright (c) 1998, 2006, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | /* | ||
| 27 | * (C) Copyright Taligent, Inc. 1996 - 1997, All Rights Reserved | ||
| 28 | * (C) Copyright IBM Corp. 1996 - 1998, All Rights Reserved | ||
| 29 | * | ||
| 30 | * The original version of this source code and documentation is | ||
| 31 | * copyrighted and owned by Taligent, Inc., a wholly-owned subsidiary | ||
| 32 | * of IBM. These materials are provided under terms of a License | ||
| 33 | * Agreement between Taligent and Sun. This technology is protected | ||
| 34 | * by multiple US and International patents. | ||
| 35 | * | ||
| 36 | * This notice and attribution to Taligent may not be removed. | ||
| 37 | * Taligent is a registered trademark of Taligent, Inc. | ||
| 38 | * | ||
| 39 | */ | ||
| 40 | |||
| 41 | package java.awt.font; | ||
| 42 | |||
| 43 | import java.awt.Shape; | ||
| 44 | import java.awt.Graphics; | ||
| 45 | import java.awt.Rectangle; | ||
| 46 | import java.awt.Graphics2D; | ||
| 47 | import java.awt.Shape; | ||
| 48 | import java.awt.geom.AffineTransform; | ||
| 49 | import java.awt.geom.Rectangle2D; | ||
| 50 | |||
| 51 | /** | ||
| 52 | * The <code>ShapeGraphicAttribute</code> class is an implementation of | ||
| 53 | * {@link GraphicAttribute} that draws shapes in a {@link TextLayout}. | ||
| 54 | * @see GraphicAttribute | ||
| 55 | */ | ||
| 56 | public final class ShapeGraphicAttribute extends GraphicAttribute { | ||
| 57 | |||
| 58 | private Shape fShape; | ||
| 59 | private boolean fStroke; | ||
| 60 | |||
| 61 | /** | ||
| 62 | * A key indicating the shape should be stroked with a 1-pixel wide stroke. | ||
| 63 | */ | ||
| 64 | public static final boolean STROKE = true; | ||
| 65 | |||
| 66 | /** | ||
| 67 | * A key indicating the shape should be filled. | ||
| 68 | */ | ||
| 69 | public static final boolean FILL = false; | ||
| 70 | |||
| 71 | // cache shape bounds, since GeneralPath doesn't | ||
| 72 | private Rectangle2D fShapeBounds; | ||
| 73 | |||
| 74 | /** | ||
| 75 | * Constructs a <code>ShapeGraphicAttribute</code> for the specified | ||
| 76 | * {@link Shape}. | ||
| 77 | * @param shape the <code>Shape</code> to render. The | ||
| 78 | * <code>Shape</code> is rendered with its origin at the origin of | ||
| 79 | * this <code>ShapeGraphicAttribute</code> in the | ||
| 80 | * host <code>TextLayout</code>. This object maintains a reference to | ||
| 81 | * <code>shape</code>. | ||
| 82 | * @param alignment one of the alignments from this | ||
| 83 | * <code>ShapeGraphicAttribute</code>. | ||
| 84 | * @param stroke <code>true</code> if the <code>Shape</code> should be | ||
| 85 | * stroked; <code>false</code> if the <code>Shape</code> should be | ||
| 86 | * filled. | ||
| 87 | */ | ||
| 88 | public ShapeGraphicAttribute(Shape shape, | ||
| 89 | int alignment, | ||
| 90 | boolean stroke) { | ||
| 91 | |||
| 92 | super(alignment); | ||
| 93 | |||
| 94 | fShape = shape; | ||
| 95 | fStroke = stroke; | ||
| 96 | fShapeBounds = fShape.getBounds2D(); | ||
| 97 | } | ||
| 98 | |||
| 99 | /** | ||
| 100 | * Returns the ascent of this <code>ShapeGraphicAttribute</code>. The | ||
| 101 | * ascent of a <code>ShapeGraphicAttribute</code> is the positive | ||
| 102 | * distance from the origin of its <code>Shape</code> to the top of | ||
| 103 | * bounds of its <code>Shape</code>. | ||
| 104 | * @return the ascent of this <code>ShapeGraphicAttribute</code>. | ||
| 105 | */ | ||
| 106 | public float getAscent() { | ||
| 107 | |||
| 108 | return (float) Math.max(0, -fShapeBounds.getMinY()); | ||
| 109 | } | ||
| 110 | |||
| 111 | /** | ||
| 112 | * Returns the descent of this <code>ShapeGraphicAttribute</code>. | ||
| 113 | * The descent of a <code>ShapeGraphicAttribute</code> is the distance | ||
| 114 | * from the origin of its <code>Shape</code> to the bottom of the | ||
| 115 | * bounds of its <code>Shape</code>. | ||
| 116 | * @return the descent of this <code>ShapeGraphicAttribute</code>. | ||
| 117 | */ | ||
| 118 | public float getDescent() { | ||
| 119 | |||
| 120 | return (float) Math.max(0, fShapeBounds.getMaxY()); | ||
| 121 | } | ||
| 122 | |||
| 123 | /** | ||
| 124 | * Returns the advance of this <code>ShapeGraphicAttribute</code>. | ||
| 125 | * The advance of a <code>ShapeGraphicAttribute</code> is the distance | ||
| 126 | * from the origin of its <code>Shape</code> to the right side of the | ||
| 127 | * bounds of its <code>Shape</code>. | ||
| 128 | * @return the advance of this <code>ShapeGraphicAttribute</code>. | ||
| 129 | */ | ||
| 130 | public float getAdvance() { | ||
| 131 | |||
| 132 | return (float) Math.max(0, fShapeBounds.getMaxX()); | ||
| 133 | } | ||
| 134 | |||
| 135 | /** | ||
| 136 | * {@inheritDoc} | ||
| 137 | */ | ||
| 138 | public void draw(Graphics2D graphics, float x, float y) { | ||
| 139 | |||
| 140 | // translating graphics to draw Shape !!! | ||
| 141 | graphics.translate((int)x, (int)y); | ||
| 142 | |||
| 143 | try { | ||
| 144 | if (fStroke == STROKE) { | ||
| 145 | // REMIND: set stroke to correct size | ||
| 146 | graphics.draw(fShape); | ||
| 147 | } | ||
| 148 | else { | ||
| 149 | graphics.fill(fShape); | ||
| 150 | } | ||
| 151 | } | ||
| 152 | finally { | ||
| 153 | graphics.translate(-(int)x, -(int)y); | ||
| 154 | } | ||
| 155 | } | ||
| 156 | |||
| 157 | /** | ||
| 158 | * Returns a {@link Rectangle2D} that encloses all of the | ||
| 159 | * bits drawn by this <code>ShapeGraphicAttribute</code> relative to | ||
| 160 | * the rendering position. A graphic can be rendered beyond its | ||
| 161 | * origin, ascent, descent, or advance; but if it does, this method's | ||
| 162 | * implementation should indicate where the graphic is rendered. | ||
| 163 | * @return a <code>Rectangle2D</code> that encloses all of the bits | ||
| 164 | * rendered by this <code>ShapeGraphicAttribute</code>. | ||
| 165 | */ | ||
| 166 | public Rectangle2D getBounds() { | ||
| 167 | |||
| 168 | Rectangle2D.Float bounds = new Rectangle2D.Float(); | ||
| 169 | bounds.setRect(fShapeBounds); | ||
| 170 | |||
| 171 | if (fStroke == STROKE) { | ||
| 172 | ++bounds.width; | ||
| 173 | ++bounds.height; | ||
| 174 | } | ||
| 175 | |||
| 176 | return bounds; | ||
| 177 | } | ||
| 178 | |||
| 179 | /** | ||
| 180 | * Return a {@link java.awt.Shape} that represents the region that | ||
| 181 | * this <code>ShapeGraphicAttribute</code> renders. This is used when a | ||
| 182 | * {@link TextLayout} is requested to return the outline of the text. | ||
| 183 | * The (untransformed) shape must not extend outside the rectangular | ||
| 184 | * bounds returned by <code>getBounds</code>. | ||
| 185 | * @param tx an optional {@link AffineTransform} to apply to the | ||
| 186 | * this <code>ShapeGraphicAttribute</code>. This can be null. | ||
| 187 | * @return the <code>Shape</code> representing this graphic attribute, | ||
| 188 | * suitable for stroking or filling. | ||
| 189 | * @since 1.6 | ||
| 190 | */ | ||
| 191 | public Shape getOutline(AffineTransform tx) { | ||
| 192 | return tx == null ? fShape : tx.createTransformedShape(fShape); | ||
| 193 | } | ||
| 194 | |||
| 195 | /** | ||
| 196 | * Returns a hashcode for this <code>ShapeGraphicAttribute</code>. | ||
| 197 | * @return a hash code value for this | ||
| 198 | * <code>ShapeGraphicAttribute</code>. | ||
| 199 | */ | ||
| 200 | public int hashCode() { | ||
| 201 | |||
| 202 | return fShape.hashCode(); | ||
| 203 | } | ||
| 204 | |||
| 205 | /** | ||
| 206 | * Compares this <code>ShapeGraphicAttribute</code> to the specified | ||
| 207 | * <code>Object</code>. | ||
| 208 | * @param rhs the <code>Object</code> to compare for equality | ||
| 209 | * @return <code>true</code> if this | ||
| 210 | * <code>ShapeGraphicAttribute</code> equals <code>rhs</code>; | ||
| 211 | * <code>false</code> otherwise. | ||
| 212 | */ | ||
| 213 | public boolean equals(Object rhs) { | ||
| 214 | |||
| 215 | try { | ||
| 216 | return equals((ShapeGraphicAttribute) rhs); | ||
| 217 | } | ||
| 218 | catch(ClassCastException e) { | ||
| 219 | return false; | ||
| 220 | } | ||
| 221 | } | ||
| 222 | |||
| 223 | /** | ||
| 224 | * Compares this <code>ShapeGraphicAttribute</code> to the specified | ||
| 225 | * <code>ShapeGraphicAttribute</code>. | ||
| 226 | * @param rhs the <code>ShapeGraphicAttribute</code> to compare for | ||
| 227 | * equality | ||
| 228 | * @return <code>true</code> if this | ||
| 229 | * <code>ShapeGraphicAttribute</code> equals <code>rhs</code>; | ||
| 230 | * <code>false</code> otherwise. | ||
| 231 | */ | ||
| 232 | public boolean equals(ShapeGraphicAttribute rhs) { | ||
| 233 | |||
| 234 | if (rhs == null) { | ||
| 235 | return false; | ||
| 236 | } | ||
| 237 | |||
| 238 | if (this == rhs) { | ||
| 239 | return true; | ||
| 240 | } | ||
| 241 | |||
| 242 | if (fStroke != rhs.fStroke) { | ||
| 243 | return false; | ||
| 244 | } | ||
| 245 | |||
| 246 | if (getAlignment() != rhs.getAlignment()) { | ||
| 247 | return false; | ||
| 248 | } | ||
| 249 | |||
| 250 | if (!fShape.equals(rhs.fShape)) { | ||
| 251 | return false; | ||
| 252 | } | ||
| 253 | |||
| 254 | return true; | ||
| 255 | } | ||
| 256 | } | ||