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| 1 | /* | ||
| 2 | * Copyright (c) 1998, 2005, 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 | |||
| 31 | package sun.font; | ||
| 32 | |||
| 33 | import java.awt.Font; | ||
| 34 | import java.awt.Graphics2D; | ||
| 35 | import java.awt.Rectangle; | ||
| 36 | import java.awt.Shape; | ||
| 37 | import java.awt.font.FontRenderContext; | ||
| 38 | import java.awt.font.LineMetrics; | ||
| 39 | import java.awt.font.GraphicAttribute; | ||
| 40 | import java.awt.font.GlyphJustificationInfo; | ||
| 41 | import java.awt.geom.AffineTransform; | ||
| 42 | import java.awt.geom.GeneralPath; | ||
| 43 | import java.awt.geom.Rectangle2D; | ||
| 44 | import java.text.Bidi; | ||
| 45 | import java.util.Map; | ||
| 46 | |||
| 47 | public final class GraphicComponent implements TextLineComponent, | ||
| 48 | Decoration.Label { | ||
| 49 | |||
| 50 | public static final float GRAPHIC_LEADING = 2; | ||
| 51 | |||
| 52 | private GraphicAttribute graphic; | ||
| 53 | private int graphicCount; | ||
| 54 | private int[] charsLtoV; // possibly null | ||
| 55 | private byte[] levels; // possibly null | ||
| 56 | |||
| 57 | // evaluated in computeVisualBounds | ||
| 58 | private Rectangle2D visualBounds = null; | ||
| 59 | |||
| 60 | // used everywhere so we'll cache it | ||
| 61 | private float graphicAdvance; | ||
| 62 | |||
| 63 | private AffineTransform baseTx; | ||
| 64 | |||
| 65 | private CoreMetrics cm; | ||
| 66 | private Decoration decorator; | ||
| 67 | |||
| 68 | |||
| 69 | /** | ||
| 70 | * Create a new GraphicComponent. start and limit are indices | ||
| 71 | * into charLtoV and levels. charsLtoV and levels may be adopted. | ||
| 72 | */ | ||
| 73 | public GraphicComponent(GraphicAttribute graphic, | ||
| 74 | Decoration decorator, | ||
| 75 | int[] charsLtoV, | ||
| 76 | byte[] levels, | ||
| 77 | int start, | ||
| 78 | int limit, | ||
| 79 | AffineTransform baseTx) { | ||
| 80 | |||
| 81 | if (limit <= start) { | ||
| 82 | throw new IllegalArgumentException("0 or negative length in GraphicComponent"); | ||
| 83 | } | ||
| 84 | this.graphic = graphic; | ||
| 85 | this.graphicAdvance = graphic.getAdvance(); | ||
| 86 | this.decorator = decorator; | ||
| 87 | this.cm = createCoreMetrics(graphic); | ||
| 88 | this.baseTx = baseTx; | ||
| 89 | |||
| 90 | initLocalOrdering(charsLtoV, levels, start, limit); | ||
| 91 | } | ||
| 92 | |||
| 93 | private GraphicComponent(GraphicComponent parent, int start, int limit, int dir) { | ||
| 94 | |||
| 95 | this.graphic = parent.graphic; | ||
| 96 | this.graphicAdvance = parent.graphicAdvance; | ||
| 97 | this.decorator = parent.decorator; | ||
| 98 | this.cm = parent.cm; | ||
| 99 | this.baseTx = parent.baseTx; | ||
| 100 | |||
| 101 | int[] charsLtoV = null; | ||
| 102 | byte[] levels = null; | ||
| 103 | |||
| 104 | if (dir == UNCHANGED) { | ||
| 105 | charsLtoV = parent.charsLtoV; | ||
| 106 | levels = parent.levels; | ||
| 107 | } | ||
| 108 | else if (dir == LEFT_TO_RIGHT || dir == RIGHT_TO_LEFT) { | ||
| 109 | limit -= start; | ||
| 110 | start = 0; | ||
| 111 | if (dir == RIGHT_TO_LEFT) { | ||
| 112 | charsLtoV = new int[limit]; | ||
| 113 | levels = new byte[limit]; | ||
| 114 | for (int i=0; i < limit; i++) { | ||
| 115 | charsLtoV[i] = limit-i-1; | ||
| 116 | levels[i] = (byte) 1; | ||
| 117 | } | ||
| 118 | } | ||
| 119 | } | ||
| 120 | else { | ||
| 121 | throw new IllegalArgumentException("Invalid direction flag"); | ||
| 122 | } | ||
| 123 | |||
| 124 | initLocalOrdering(charsLtoV, levels, start, limit); | ||
| 125 | } | ||
| 126 | |||
| 127 | /** | ||
| 128 | * Initialize graphicCount, also charsLtoV and levels arrays. | ||
| 129 | */ | ||
| 130 | private void initLocalOrdering(int[] charsLtoV, | ||
| 131 | byte[] levels, | ||
| 132 | int start, | ||
| 133 | int limit) { | ||
| 134 | |||
| 135 | this.graphicCount = limit - start; // todo: should be codepoints? | ||
| 136 | |||
| 137 | if (charsLtoV == null || charsLtoV.length == graphicCount) { | ||
| 138 | this.charsLtoV = charsLtoV; | ||
| 139 | } | ||
| 140 | else { | ||
| 141 | this.charsLtoV = BidiUtils.createNormalizedMap(charsLtoV, levels, start, limit); | ||
| 142 | } | ||
| 143 | |||
| 144 | if (levels == null || levels.length == graphicCount) { | ||
| 145 | this.levels = levels; | ||
| 146 | } | ||
| 147 | else { | ||
| 148 | this.levels = new byte[graphicCount]; | ||
| 149 | System.arraycopy(levels, start, this.levels, 0, graphicCount); | ||
| 150 | } | ||
| 151 | } | ||
| 152 | |||
| 153 | public boolean isSimple() { | ||
| 154 | return false; | ||
| 155 | } | ||
| 156 | |||
| 157 | public Rectangle getPixelBounds(FontRenderContext frc, float x, float y) { | ||
| 158 | throw new InternalError("do not call if isSimple returns false"); | ||
| 159 | } | ||
| 160 | |||
| 161 | public Rectangle2D handleGetVisualBounds() { | ||
| 162 | |||
| 163 | Rectangle2D bounds = graphic.getBounds(); | ||
| 164 | |||
| 165 | float width = (float) bounds.getWidth() + | ||
| 166 | graphicAdvance * (graphicCount-1); | ||
| 167 | |||
| 168 | return new Rectangle2D.Float((float) bounds.getX(), | ||
| 169 | (float) bounds.getY(), | ||
| 170 | width, | ||
| 171 | (float) bounds.getHeight()); | ||
| 172 | } | ||
| 173 | |||
| 174 | public CoreMetrics getCoreMetrics() { | ||
| 175 | return cm; | ||
| 176 | } | ||
| 177 | |||
| 178 | public static CoreMetrics createCoreMetrics(GraphicAttribute graphic) { | ||
| 179 | return new CoreMetrics(graphic.getAscent(), | ||
| 180 | graphic.getDescent(), | ||
| 181 | GRAPHIC_LEADING, | ||
| 182 | graphic.getAscent() + graphic.getDescent() + GRAPHIC_LEADING, | ||
| 183 | graphic.getAlignment(), | ||
| 184 | new float[] { 0, -graphic.getAscent() / 2, -graphic.getAscent() }, | ||
| 185 | -graphic.getAscent() / 2, | ||
| 186 | graphic.getAscent() / 12, | ||
| 187 | graphic.getDescent() / 3, | ||
| 188 | graphic.getAscent() / 12, | ||
| 189 | 0, // ss offset | ||
| 190 | 0); // italic angle -- need api for this | ||
| 191 | } | ||
| 192 | |||
| 193 | public float getItalicAngle() { | ||
| 194 | |||
| 195 | return 0; | ||
| 196 | } | ||
| 197 | |||
| 198 | public Rectangle2D getVisualBounds() { | ||
| 199 | |||
| 200 | if (visualBounds == null) { | ||
| 201 | visualBounds = decorator.getVisualBounds(this); | ||
| 202 | } | ||
| 203 | Rectangle2D.Float bounds = new Rectangle2D.Float(); | ||
| 204 | bounds.setRect(visualBounds); | ||
| 205 | return bounds; | ||
| 206 | } | ||
| 207 | |||
| 208 | public Shape handleGetOutline(float x, float y) { | ||
| 209 | double[] matrix = { 1, 0, 0, 1, x, y }; | ||
| 210 | |||
| 211 | if (graphicCount == 1) { | ||
| 212 | AffineTransform tx = new AffineTransform(matrix); | ||
| 213 | return graphic.getOutline(tx); | ||
| 214 | } | ||
| 215 | |||
| 216 | GeneralPath gp = new GeneralPath(); | ||
| 217 | for (int i = 0; i < graphicCount; ++i) { | ||
| 218 | AffineTransform tx = new AffineTransform(matrix); | ||
| 219 | gp.append(graphic.getOutline(tx), false); | ||
| 220 | matrix[4] += graphicAdvance; | ||
| 221 | } | ||
| 222 | |||
| 223 | return gp; | ||
| 224 | } | ||
| 225 | |||
| 226 | public AffineTransform getBaselineTransform() { | ||
| 227 | return baseTx; | ||
| 228 | } | ||
| 229 | |||
| 230 | public Shape getOutline(float x, float y) { | ||
| 231 | |||
| 232 | return decorator.getOutline(this, x, y); | ||
| 233 | } | ||
| 234 | |||
| 235 | public void handleDraw(Graphics2D g2d, float x, float y) { | ||
| 236 | |||
| 237 | for (int i=0; i < graphicCount; i++) { | ||
| 238 | |||
| 239 | graphic.draw(g2d, x, y); | ||
| 240 | x += graphicAdvance; | ||
| 241 | } | ||
| 242 | } | ||
| 243 | |||
| 244 | public void draw(Graphics2D g2d, float x, float y) { | ||
| 245 | |||
| 246 | decorator.drawTextAndDecorations(this, g2d, x, y); | ||
| 247 | } | ||
| 248 | |||
| 249 | public Rectangle2D getCharVisualBounds(int index) { | ||
| 250 | |||
| 251 | return decorator.getCharVisualBounds(this, index); | ||
| 252 | } | ||
| 253 | |||
| 254 | public int getNumCharacters() { | ||
| 255 | |||
| 256 | return graphicCount; | ||
| 257 | } | ||
| 258 | |||
| 259 | public float getCharX(int index) { | ||
| 260 | |||
| 261 | int visIndex = charsLtoV==null? index : charsLtoV[index]; | ||
| 262 | return graphicAdvance * visIndex; | ||
| 263 | } | ||
| 264 | |||
| 265 | public float getCharY(int index) { | ||
| 266 | |||
| 267 | return 0; | ||
| 268 | } | ||
| 269 | |||
| 270 | public float getCharAdvance(int index) { | ||
| 271 | |||
| 272 | return graphicAdvance; | ||
| 273 | } | ||
| 274 | |||
| 275 | public boolean caretAtOffsetIsValid(int index) { | ||
| 276 | |||
| 277 | return true; | ||
| 278 | } | ||
| 279 | |||
| 280 | public Rectangle2D handleGetCharVisualBounds(int index) { | ||
| 281 | |||
| 282 | Rectangle2D bounds = graphic.getBounds(); | ||
| 283 | // don't modify their rectangle, just in case they don't copy | ||
| 284 | |||
| 285 | Rectangle2D.Float charBounds = new Rectangle2D.Float(); | ||
| 286 | charBounds.setRect(bounds); | ||
| 287 | charBounds.x += graphicAdvance * index; | ||
| 288 | |||
| 289 | return charBounds; | ||
| 290 | } | ||
| 291 | |||
| 292 | // measures characters in context, in logical order | ||
| 293 | public int getLineBreakIndex(int start, float width) { | ||
| 294 | |||
| 295 | int index = (int) (width / graphicAdvance); | ||
| 296 | if (index > graphicCount - start) { | ||
| 297 | index = graphicCount - start; | ||
| 298 | } | ||
| 299 | return index; | ||
| 300 | } | ||
| 301 | |||
| 302 | // measures characters in context, in logical order | ||
| 303 | public float getAdvanceBetween(int start, int limit) { | ||
| 304 | |||
| 305 | return graphicAdvance * (limit - start); | ||
| 306 | } | ||
| 307 | |||
| 308 | public Rectangle2D getLogicalBounds() { | ||
| 309 | |||
| 310 | float left = 0; | ||
| 311 | float top = -cm.ascent; | ||
| 312 | float width = graphicAdvance * graphicCount; | ||
| 313 | float height = cm.descent - top; | ||
| 314 | |||
| 315 | return new Rectangle2D.Float(left, top, width, height); | ||
| 316 | } | ||
| 317 | |||
| 318 | public float getAdvance() { | ||
| 319 | return graphicAdvance * graphicCount; | ||
| 320 | } | ||
| 321 | |||
| 322 | public Rectangle2D getItalicBounds() { | ||
| 323 | return getLogicalBounds(); | ||
| 324 | } | ||
| 325 | |||
| 326 | public TextLineComponent getSubset(int start, int limit, int dir) { | ||
| 327 | |||
| 328 | if (start < 0 || limit > graphicCount || start >= limit) { | ||
| 329 | throw new IllegalArgumentException("Invalid range. start=" | ||
| 330 | +start+"; limit="+limit); | ||
| 331 | } | ||
| 332 | |||
| 333 | if (start == 0 && limit == graphicCount && dir == UNCHANGED) { | ||
| 334 | return this; | ||
| 335 | } | ||
| 336 | |||
| 337 | return new GraphicComponent(this, start, limit, dir); | ||
| 338 | } | ||
| 339 | |||
| 340 | public String toString() { | ||
| 341 | |||
| 342 | return "[graphic=" + graphic + ":count=" + getNumCharacters() + "]"; | ||
| 343 | } | ||
| 344 | |||
| 345 | /** | ||
| 346 | * Return the number of justification records this uses. | ||
| 347 | */ | ||
| 348 | public int getNumJustificationInfos() { | ||
| 349 | return 0; | ||
| 350 | } | ||
| 351 | |||
| 352 | /** | ||
| 353 | * Return GlyphJustificationInfo objects for the characters between | ||
| 354 | * charStart and charLimit, starting at offset infoStart. Infos | ||
| 355 | * will be in visual order. All positions between infoStart and | ||
| 356 | * getNumJustificationInfos will be set. If a position corresponds | ||
| 357 | * to a character outside the provided range, it is set to null. | ||
| 358 | */ | ||
| 359 | public void getJustificationInfos(GlyphJustificationInfo[] infos, int infoStart, int charStart, int charLimit) { | ||
| 360 | } | ||
| 361 | |||
| 362 | /** | ||
| 363 | * Apply deltas to the data in this component, starting at offset | ||
| 364 | * deltaStart, and return the new component. There are two floats | ||
| 365 | * for each justification info, for a total of 2 * getNumJustificationInfos. | ||
| 366 | * The first delta is the left adjustment, the second is the right | ||
| 367 | * adjustment. | ||
| 368 | * <p> | ||
| 369 | * If flags[0] is true on entry, rejustification is allowed. If | ||
| 370 | * the new component requires rejustification (ligatures were | ||
| 371 | * formed or split), flags[0] will be set on exit. | ||
| 372 | */ | ||
| 373 | public TextLineComponent applyJustificationDeltas(float[] deltas, int deltaStart, boolean[] flags) { | ||
| 374 | return this; | ||
| 375 | } | ||
| 376 | } | ||