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| 1 | +/* | |
| 2 | + * Copyright (c) 1998, 2003, 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 IBM Corp. 1998-2003 - All Rights Reserved | |
| 28 | + */ | |
| 29 | + | |
| 30 | +package sun.font; | |
| 31 | + | |
| 32 | +import java.awt.Font; | |
| 33 | +import java.awt.font.FontRenderContext; | |
| 34 | +import java.awt.font.LineMetrics; | |
| 35 | + | |
| 36 | +public class StandardTextSource extends TextSource { | |
| 37 | + char[] chars; | |
| 38 | + int start; | |
| 39 | + int len; | |
| 40 | + int cstart; | |
| 41 | + int clen; | |
| 42 | + int level; // assumed all uniform | |
| 43 | + int flags; // see GlyphVector.java | |
| 44 | + Font font; | |
| 45 | + FontRenderContext frc; | |
| 46 | + CoreMetrics cm; | |
| 47 | + | |
| 48 | + /** | |
| 49 | + * Create a simple implementation of a TextSource. | |
| 50 | + * | |
| 51 | + * Chars is an array containing clen chars in the context, in | |
| 52 | + * logical order, contiguously starting at cstart. Start and len | |
| 53 | + * represent that portion of the context representing the true | |
| 54 | + * source; start, like cstart, is relative to the start of the | |
| 55 | + * character array. | |
| 56 | + * | |
| 57 | + * Level is the bidi level (0-63 for the entire context. Flags is | |
| 58 | + * the layout flags. Font is the font, frc is the render context, | |
| 59 | + * and lm is the line metrics for the entire source text, but not | |
| 60 | + * necessarily the context. | |
| 61 | + */ | |
| 62 | + public StandardTextSource(char[] chars, | |
| 63 | + int start, | |
| 64 | + int len, | |
| 65 | + int cstart, | |
| 66 | + int clen, | |
| 67 | + int level, | |
| 68 | + int flags, | |
| 69 | + Font font, | |
| 70 | + FontRenderContext frc, | |
| 71 | + CoreMetrics cm) { | |
| 72 | + if (chars == null) { | |
| 73 | + throw new IllegalArgumentException("bad chars: null"); | |
| 74 | + } | |
| 75 | + if (cstart < 0) { | |
| 76 | + throw new IllegalArgumentException("bad cstart: " + cstart); | |
| 77 | + } | |
| 78 | + if (start < cstart) { | |
| 79 | + throw new IllegalArgumentException("bad start: " + start + " for cstart: " + cstart); | |
| 80 | + } | |
| 81 | + if (clen < 0) { | |
| 82 | + throw new IllegalArgumentException("bad clen: " + clen); | |
| 83 | + } | |
| 84 | + if (cstart + clen > chars.length) { | |
| 85 | + throw new IllegalArgumentException("bad clen: " + clen + " cstart: " + cstart + " for array len: " + chars.length); | |
| 86 | + } | |
| 87 | + if (len < 0) { | |
| 88 | + throw new IllegalArgumentException("bad len: " + len); | |
| 89 | + } | |
| 90 | + if ((start + len) > (cstart + clen)) { | |
| 91 | + throw new IllegalArgumentException("bad len: " + len + " start: " + start + " for cstart: " + cstart + " clen: " + clen); | |
| 92 | + } | |
| 93 | + if (font == null) { | |
| 94 | + throw new IllegalArgumentException("bad font: null"); | |
| 95 | + } | |
| 96 | + if (frc == null) { | |
| 97 | + throw new IllegalArgumentException("bad frc: null"); | |
| 98 | + } | |
| 99 | + | |
| 100 | + this.chars = chars; | |
| 101 | + this.start = start; | |
| 102 | + this.len = len; | |
| 103 | + this.cstart = cstart; | |
| 104 | + this.clen = clen; | |
| 105 | + this.level = level; | |
| 106 | + this.flags = flags; | |
| 107 | + this.font = font; | |
| 108 | + this.frc = frc; | |
| 109 | + | |
| 110 | + if (cm != null) { | |
| 111 | + this.cm = cm; | |
| 112 | + } else { | |
| 113 | + LineMetrics metrics = font.getLineMetrics(chars, cstart, clen, frc); | |
| 114 | + this.cm = ((FontLineMetrics)metrics).cm; | |
| 115 | + } | |
| 116 | + } | |
| 117 | + | |
| 118 | + /** Create a StandardTextSource whose context is coextensive with the source. */ | |
| 119 | + public StandardTextSource(char[] chars, | |
| 120 | + int start, | |
| 121 | + int len, | |
| 122 | + int level, | |
| 123 | + int flags, | |
| 124 | + Font font, | |
| 125 | + FontRenderContext frc, | |
| 126 | + CoreMetrics cm) { | |
| 127 | + this(chars, start, len, start, len, level, flags, font, frc, cm); | |
| 128 | + } | |
| 129 | + | |
| 130 | + /** Create a StandardTextSource whose context and source are coextensive with the entire char array. */ | |
| 131 | + public StandardTextSource(char[] chars, | |
| 132 | + int level, | |
| 133 | + int flags, | |
| 134 | + Font font, | |
| 135 | + FontRenderContext frc) { | |
| 136 | + this(chars, 0, chars.length, 0, chars.length, level, flags, font, frc, null); | |
| 137 | + } | |
| 138 | + | |
| 139 | + /** Create a StandardTextSource whose context and source are all the text in the String. */ | |
| 140 | + public StandardTextSource(String str, | |
| 141 | + int level, | |
| 142 | + int flags, | |
| 143 | + Font font, | |
| 144 | + FontRenderContext frc) { | |
| 145 | + this(str.toCharArray(), 0, str.length(), 0, str.length(), level, flags, font, frc, null); | |
| 146 | + } | |
| 147 | + | |
| 148 | + // TextSource API | |
| 149 | + | |
| 150 | + public char[] getChars() { | |
| 151 | + return chars; | |
| 152 | + } | |
| 153 | + | |
| 154 | + public int getStart() { | |
| 155 | + return start; | |
| 156 | + } | |
| 157 | + | |
| 158 | + public int getLength() { | |
| 159 | + return len; | |
| 160 | + } | |
| 161 | + | |
| 162 | + public int getContextStart() { | |
| 163 | + return cstart; | |
| 164 | + } | |
| 165 | + | |
| 166 | + public int getContextLength() { | |
| 167 | + return clen; | |
| 168 | + } | |
| 169 | + | |
| 170 | + public int getLayoutFlags() { | |
| 171 | + return flags; | |
| 172 | + } | |
| 173 | + | |
| 174 | + public int getBidiLevel() { | |
| 175 | + return level; | |
| 176 | + } | |
| 177 | + | |
| 178 | + public Font getFont() { | |
| 179 | + return font; | |
| 180 | + } | |
| 181 | + | |
| 182 | + public FontRenderContext getFRC() { | |
| 183 | + return frc; | |
| 184 | + } | |
| 185 | + | |
| 186 | + public CoreMetrics getCoreMetrics() { | |
| 187 | + return cm; | |
| 188 | + } | |
| 189 | + | |
| 190 | + public TextSource getSubSource(int start, int length, int dir) { | |
| 191 | + if (start < 0 || length < 0 || (start + length) > len) { | |
| 192 | + throw new IllegalArgumentException("bad start (" + start + ") or length (" + length + ")"); | |
| 193 | + } | |
| 194 | + | |
| 195 | + int level = this.level; | |
| 196 | + if (dir != TextLineComponent.UNCHANGED) { | |
| 197 | + boolean ltr = (flags & 0x8) == 0; | |
| 198 | + if (!(dir == TextLineComponent.LEFT_TO_RIGHT && ltr) && | |
| 199 | + !(dir == TextLineComponent.RIGHT_TO_LEFT && !ltr)) { | |
| 200 | + throw new IllegalArgumentException("direction flag is invalid"); | |
| 201 | + } | |
| 202 | + level = ltr? 0 : 1; | |
| 203 | + } | |
| 204 | + | |
| 205 | + return new StandardTextSource(chars, this.start + start, length, cstart, clen, level, flags, font, frc, cm); | |
| 206 | + } | |
| 207 | + | |
| 208 | + public String toString() { | |
| 209 | + return toString(WITH_CONTEXT); | |
| 210 | + } | |
| 211 | + | |
| 212 | + public String toString(boolean withContext) { | |
| 213 | + StringBuffer buf = new StringBuffer(super.toString()); | |
| 214 | + buf.append("[start:"); | |
| 215 | + buf.append(start); | |
| 216 | + buf.append(", len:" ); | |
| 217 | + buf.append(len); | |
| 218 | + buf.append(", cstart:"); | |
| 219 | + buf.append(cstart); | |
| 220 | + buf.append(", clen:" ); | |
| 221 | + buf.append(clen); | |
| 222 | + buf.append(", chars:\""); | |
| 223 | + int chStart, chLimit; | |
| 224 | + if (withContext == WITH_CONTEXT) { | |
| 225 | + chStart = cstart; | |
| 226 | + chLimit = cstart + clen; | |
| 227 | + } | |
| 228 | + else { | |
| 229 | + chStart = start; | |
| 230 | + chLimit = start + len; | |
| 231 | + } | |
| 232 | + for (int i = chStart; i < chLimit; ++i) { | |
| 233 | + if (i > chStart) { | |
| 234 | + buf.append(" "); | |
| 235 | + } | |
| 236 | + buf.append(Integer.toHexString(chars[i])); | |
| 237 | + } | |
| 238 | + buf.append("\""); | |
| 239 | + buf.append(", level:"); | |
| 240 | + buf.append(level); | |
| 241 | + buf.append(", flags:"); | |
| 242 | + buf.append(flags); | |
| 243 | + buf.append(", font:"); | |
| 244 | + buf.append(font); | |
| 245 | + buf.append(", frc:"); | |
| 246 | + buf.append(frc); | |
| 247 | + buf.append(", cm:"); | |
| 248 | + buf.append(cm); | |
| 249 | + buf.append("]"); | |
| 250 | + | |
| 251 | + return buf.toString(); | |
| 252 | + } | |
| 253 | +} | |