The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package android.text; |
| 18 | |
Doug Felt | 4e0c5e5 | 2010-03-15 16:56:02 -0700 | [diff] [blame^] | 19 | import com.android.internal.util.ArrayUtils; |
| 20 | |
The Android Open Source Project | 1059253 | 2009-03-18 17:39:46 -0700 | [diff] [blame] | 21 | import android.graphics.Bitmap; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 22 | import android.graphics.Paint; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 23 | import android.text.style.LeadingMarginSpan; |
| 24 | import android.text.style.LineHeightSpan; |
| 25 | import android.text.style.MetricAffectingSpan; |
| 26 | import android.text.style.ReplacementSpan; |
Doug Felt | 4e0c5e5 | 2010-03-15 16:56:02 -0700 | [diff] [blame^] | 27 | import android.util.Log; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 28 | |
| 29 | /** |
| 30 | * StaticLayout is a Layout for text that will not be edited after it |
| 31 | * is laid out. Use {@link DynamicLayout} for text that may change. |
| 32 | * <p>This is used by widgets to control text layout. You should not need |
| 33 | * to use this class directly unless you are implementing your own widget |
| 34 | * or custom display object, or would be tempted to call |
Doug Felt | 4e0c5e5 | 2010-03-15 16:56:02 -0700 | [diff] [blame^] | 35 | * {@link android.graphics.Canvas#drawText(java.lang.CharSequence, int, int, |
| 36 | * float, float, android.graphics.Paint) |
| 37 | * Canvas.drawText()} directly.</p> |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 38 | */ |
| 39 | public class |
| 40 | StaticLayout |
| 41 | extends Layout |
| 42 | { |
| 43 | public StaticLayout(CharSequence source, TextPaint paint, |
| 44 | int width, |
| 45 | Alignment align, float spacingmult, float spacingadd, |
| 46 | boolean includepad) { |
| 47 | this(source, 0, source.length(), paint, width, align, |
| 48 | spacingmult, spacingadd, includepad); |
| 49 | } |
| 50 | |
| 51 | public StaticLayout(CharSequence source, int bufstart, int bufend, |
| 52 | TextPaint paint, int outerwidth, |
| 53 | Alignment align, |
| 54 | float spacingmult, float spacingadd, |
| 55 | boolean includepad) { |
| 56 | this(source, bufstart, bufend, paint, outerwidth, align, |
| 57 | spacingmult, spacingadd, includepad, null, 0); |
| 58 | } |
| 59 | |
| 60 | public StaticLayout(CharSequence source, int bufstart, int bufend, |
| 61 | TextPaint paint, int outerwidth, |
| 62 | Alignment align, |
| 63 | float spacingmult, float spacingadd, |
| 64 | boolean includepad, |
| 65 | TextUtils.TruncateAt ellipsize, int ellipsizedWidth) { |
| 66 | super((ellipsize == null) |
Doug Felt | 4e0c5e5 | 2010-03-15 16:56:02 -0700 | [diff] [blame^] | 67 | ? source |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 68 | : (source instanceof Spanned) |
| 69 | ? new SpannedEllipsizer(source) |
| 70 | : new Ellipsizer(source), |
| 71 | paint, outerwidth, align, spacingmult, spacingadd); |
| 72 | |
| 73 | /* |
| 74 | * This is annoying, but we can't refer to the layout until |
| 75 | * superclass construction is finished, and the superclass |
| 76 | * constructor wants the reference to the display text. |
Doug Felt | 4e0c5e5 | 2010-03-15 16:56:02 -0700 | [diff] [blame^] | 77 | * |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 78 | * This will break if the superclass constructor ever actually |
| 79 | * cares about the content instead of just holding the reference. |
| 80 | */ |
| 81 | if (ellipsize != null) { |
| 82 | Ellipsizer e = (Ellipsizer) getText(); |
| 83 | |
| 84 | e.mLayout = this; |
| 85 | e.mWidth = ellipsizedWidth; |
| 86 | e.mMethod = ellipsize; |
| 87 | mEllipsizedWidth = ellipsizedWidth; |
| 88 | |
| 89 | mColumns = COLUMNS_ELLIPSIZE; |
| 90 | } else { |
| 91 | mColumns = COLUMNS_NORMAL; |
| 92 | mEllipsizedWidth = outerwidth; |
| 93 | } |
| 94 | |
| 95 | mLines = new int[ArrayUtils.idealIntArraySize(2 * mColumns)]; |
| 96 | mLineDirections = new Directions[ |
| 97 | ArrayUtils.idealIntArraySize(2 * mColumns)]; |
| 98 | |
| 99 | generate(source, bufstart, bufend, paint, outerwidth, align, |
| 100 | spacingmult, spacingadd, includepad, includepad, |
| 101 | ellipsize != null, ellipsizedWidth, ellipsize); |
| 102 | |
| 103 | mChdirs = null; |
| 104 | mChs = null; |
| 105 | mWidths = null; |
| 106 | mFontMetricsInt = null; |
| 107 | } |
| 108 | |
| 109 | /* package */ StaticLayout(boolean ellipsize) { |
| 110 | super(null, null, 0, null, 0, 0); |
| 111 | |
| 112 | mColumns = COLUMNS_ELLIPSIZE; |
| 113 | mLines = new int[ArrayUtils.idealIntArraySize(2 * mColumns)]; |
| 114 | mLineDirections = new Directions[ |
| 115 | ArrayUtils.idealIntArraySize(2 * mColumns)]; |
| 116 | } |
| 117 | |
| 118 | /* package */ void generate(CharSequence source, int bufstart, int bufend, |
| 119 | TextPaint paint, int outerwidth, |
| 120 | Alignment align, |
| 121 | float spacingmult, float spacingadd, |
| 122 | boolean includepad, boolean trackpad, |
| 123 | boolean breakOnlyAtSpaces, |
| 124 | float ellipsizedWidth, TextUtils.TruncateAt where) { |
| 125 | mLineCount = 0; |
| 126 | |
| 127 | int v = 0; |
| 128 | boolean needMultiply = (spacingmult != 1 || spacingadd != 0); |
| 129 | |
| 130 | Paint.FontMetricsInt fm = mFontMetricsInt; |
| 131 | int[] choosehtv = null; |
| 132 | |
| 133 | int end = TextUtils.indexOf(source, '\n', bufstart, bufend); |
| 134 | int bufsiz = end >= 0 ? end - bufstart : bufend - bufstart; |
| 135 | boolean first = true; |
| 136 | |
| 137 | if (mChdirs == null) { |
| 138 | mChdirs = new byte[ArrayUtils.idealByteArraySize(bufsiz + 1)]; |
| 139 | mChs = new char[ArrayUtils.idealCharArraySize(bufsiz + 1)]; |
| 140 | mWidths = new float[ArrayUtils.idealIntArraySize((bufsiz + 1) * 2)]; |
| 141 | } |
| 142 | |
| 143 | byte[] chdirs = mChdirs; |
| 144 | char[] chs = mChs; |
| 145 | float[] widths = mWidths; |
| 146 | |
| 147 | AlteredCharSequence alter = null; |
| 148 | Spanned spanned = null; |
| 149 | |
| 150 | if (source instanceof Spanned) |
| 151 | spanned = (Spanned) source; |
| 152 | |
| 153 | int DEFAULT_DIR = DIR_LEFT_TO_RIGHT; // XXX |
| 154 | |
| 155 | for (int start = bufstart; start <= bufend; start = end) { |
| 156 | if (first) |
| 157 | first = false; |
| 158 | else |
| 159 | end = TextUtils.indexOf(source, '\n', start, bufend); |
| 160 | |
| 161 | if (end < 0) |
| 162 | end = bufend; |
| 163 | else |
| 164 | end++; |
| 165 | |
Mark Wagner | 7b5676e | 2009-10-16 11:44:23 -0700 | [diff] [blame] | 166 | int firstWidthLineCount = 1; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 167 | int firstwidth = outerwidth; |
| 168 | int restwidth = outerwidth; |
| 169 | |
| 170 | LineHeightSpan[] chooseht = null; |
| 171 | |
| 172 | if (spanned != null) { |
| 173 | LeadingMarginSpan[] sp; |
| 174 | |
| 175 | sp = spanned.getSpans(start, end, LeadingMarginSpan.class); |
| 176 | for (int i = 0; i < sp.length; i++) { |
Mark Wagner | 7b5676e | 2009-10-16 11:44:23 -0700 | [diff] [blame] | 177 | LeadingMarginSpan lms = sp[i]; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 178 | firstwidth -= sp[i].getLeadingMargin(true); |
| 179 | restwidth -= sp[i].getLeadingMargin(false); |
Mark Wagner | 7b5676e | 2009-10-16 11:44:23 -0700 | [diff] [blame] | 180 | if (lms instanceof LeadingMarginSpan.LeadingMarginSpan2) { |
| 181 | firstWidthLineCount = ((LeadingMarginSpan.LeadingMarginSpan2)lms).getLeadingMarginLineCount(); |
| 182 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 183 | } |
| 184 | |
| 185 | chooseht = spanned.getSpans(start, end, LineHeightSpan.class); |
| 186 | |
| 187 | if (chooseht.length != 0) { |
| 188 | if (choosehtv == null || |
| 189 | choosehtv.length < chooseht.length) { |
| 190 | choosehtv = new int[ArrayUtils.idealIntArraySize( |
| 191 | chooseht.length)]; |
| 192 | } |
| 193 | |
| 194 | for (int i = 0; i < chooseht.length; i++) { |
| 195 | int o = spanned.getSpanStart(chooseht[i]); |
| 196 | |
| 197 | if (o < start) { |
| 198 | // starts in this layout, before the |
| 199 | // current paragraph |
| 200 | |
Doug Felt | 4e0c5e5 | 2010-03-15 16:56:02 -0700 | [diff] [blame^] | 201 | choosehtv[i] = getLineTop(getLineForOffset(o)); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 202 | } else { |
| 203 | // starts in this paragraph |
| 204 | |
| 205 | choosehtv[i] = v; |
| 206 | } |
| 207 | } |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | if (end - start > chdirs.length) { |
| 212 | chdirs = new byte[ArrayUtils.idealByteArraySize(end - start)]; |
| 213 | mChdirs = chdirs; |
| 214 | } |
| 215 | if (end - start > chs.length) { |
| 216 | chs = new char[ArrayUtils.idealCharArraySize(end - start)]; |
| 217 | mChs = chs; |
| 218 | } |
| 219 | if ((end - start) * 2 > widths.length) { |
| 220 | widths = new float[ArrayUtils.idealIntArraySize((end - start) * 2)]; |
| 221 | mWidths = widths; |
| 222 | } |
| 223 | |
| 224 | TextUtils.getChars(source, start, end, chs, 0); |
| 225 | final int n = end - start; |
| 226 | |
| 227 | boolean easy = true; |
| 228 | boolean altered = false; |
Doug Felt | 9f7a444 | 2010-03-01 12:45:56 -0800 | [diff] [blame] | 229 | int dir = DEFAULT_DIR; // XXX pass value in |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 230 | |
| 231 | for (int i = 0; i < n; i++) { |
| 232 | if (chs[i] >= FIRST_RIGHT_TO_LEFT) { |
| 233 | easy = false; |
| 234 | break; |
| 235 | } |
| 236 | } |
| 237 | |
Eric Fischer | de61f78 | 2010-03-10 10:55:58 -0800 | [diff] [blame] | 238 | // Ensure that none of the underlying characters are treated |
| 239 | // as viable breakpoints, and that the entire run gets the |
| 240 | // same bidi direction. |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 241 | |
Eric Fischer | de61f78 | 2010-03-10 10:55:58 -0800 | [diff] [blame] | 242 | if (source instanceof Spanned) { |
| 243 | Spanned sp = (Spanned) source; |
| 244 | ReplacementSpan[] spans = sp.getSpans(start, end, ReplacementSpan.class); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 245 | |
Eric Fischer | de61f78 | 2010-03-10 10:55:58 -0800 | [diff] [blame] | 246 | for (int y = 0; y < spans.length; y++) { |
| 247 | int a = sp.getSpanStart(spans[y]); |
| 248 | int b = sp.getSpanEnd(spans[y]); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 249 | |
Eric Fischer | de61f78 | 2010-03-10 10:55:58 -0800 | [diff] [blame] | 250 | for (int x = a; x < b; x++) { |
| 251 | chs[x - start] = '\uFFFC'; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 252 | } |
| 253 | } |
Eric Fischer | de61f78 | 2010-03-10 10:55:58 -0800 | [diff] [blame] | 254 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 255 | |
Eric Fischer | de61f78 | 2010-03-10 10:55:58 -0800 | [diff] [blame] | 256 | if (!easy) { |
Doug Felt | 20178d6 | 2010-02-22 13:39:01 -0800 | [diff] [blame] | 257 | // XXX put override flags, etc. into chdirs |
Doug Felt | 9f7a444 | 2010-03-01 12:45:56 -0800 | [diff] [blame] | 258 | // XXX supply dir rather than force |
| 259 | dir = AndroidBidi.bidi(DIR_REQUEST_DEFAULT_LTR, chs, chdirs, n, false); |
Doug Felt | 20178d6 | 2010-02-22 13:39:01 -0800 | [diff] [blame] | 260 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 261 | // Do mirroring for right-to-left segments |
| 262 | |
| 263 | for (int i = 0; i < n; i++) { |
| 264 | if (chdirs[i] == Character.DIRECTIONALITY_RIGHT_TO_LEFT) { |
| 265 | int j; |
| 266 | |
| 267 | for (j = i; j < n; j++) { |
| 268 | if (chdirs[j] != |
| 269 | Character.DIRECTIONALITY_RIGHT_TO_LEFT) |
| 270 | break; |
| 271 | } |
| 272 | |
| 273 | if (AndroidCharacter.mirror(chs, i, j - i)) |
| 274 | altered = true; |
| 275 | |
| 276 | i = j - 1; |
| 277 | } |
| 278 | } |
| 279 | } |
| 280 | |
| 281 | CharSequence sub; |
| 282 | |
| 283 | if (altered) { |
| 284 | if (alter == null) |
| 285 | alter = AlteredCharSequence.make(source, chs, start, end); |
| 286 | else |
| 287 | alter.update(chs, start, end); |
| 288 | |
| 289 | sub = alter; |
| 290 | } else { |
| 291 | sub = source; |
| 292 | } |
| 293 | |
| 294 | int width = firstwidth; |
| 295 | |
| 296 | float w = 0; |
| 297 | int here = start; |
| 298 | |
| 299 | int ok = start; |
| 300 | float okwidth = w; |
| 301 | int okascent = 0, okdescent = 0, oktop = 0, okbottom = 0; |
| 302 | |
| 303 | int fit = start; |
| 304 | float fitwidth = w; |
| 305 | int fitascent = 0, fitdescent = 0, fittop = 0, fitbottom = 0; |
| 306 | |
| 307 | boolean tab = false; |
| 308 | |
| 309 | int next; |
| 310 | for (int i = start; i < end; i = next) { |
| 311 | if (spanned == null) |
| 312 | next = end; |
| 313 | else |
| 314 | next = spanned.nextSpanTransition(i, end, |
| 315 | MetricAffectingSpan. |
| 316 | class); |
| 317 | |
| 318 | if (spanned == null) { |
| 319 | paint.getTextWidths(sub, i, next, widths); |
| 320 | System.arraycopy(widths, 0, widths, |
| 321 | end - start + (i - start), next - i); |
Doug Felt | 4e0c5e5 | 2010-03-15 16:56:02 -0700 | [diff] [blame^] | 322 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 323 | paint.getFontMetricsInt(fm); |
| 324 | } else { |
| 325 | mWorkPaint.baselineShift = 0; |
| 326 | |
| 327 | Styled.getTextWidths(paint, mWorkPaint, |
| 328 | spanned, i, next, |
| 329 | widths, fm); |
| 330 | System.arraycopy(widths, 0, widths, |
| 331 | end - start + (i - start), next - i); |
| 332 | |
| 333 | if (mWorkPaint.baselineShift < 0) { |
| 334 | fm.ascent += mWorkPaint.baselineShift; |
| 335 | fm.top += mWorkPaint.baselineShift; |
| 336 | } else { |
| 337 | fm.descent += mWorkPaint.baselineShift; |
| 338 | fm.bottom += mWorkPaint.baselineShift; |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | int fmtop = fm.top; |
| 343 | int fmbottom = fm.bottom; |
| 344 | int fmascent = fm.ascent; |
| 345 | int fmdescent = fm.descent; |
| 346 | |
| 347 | if (false) { |
| 348 | StringBuilder sb = new StringBuilder(); |
| 349 | for (int j = i; j < next; j++) { |
| 350 | sb.append(widths[j - start + (end - start)]); |
| 351 | sb.append(' '); |
| 352 | } |
| 353 | |
| 354 | Log.e("text", sb.toString()); |
| 355 | } |
| 356 | |
| 357 | for (int j = i; j < next; j++) { |
| 358 | char c = chs[j - start]; |
| 359 | float before = w; |
| 360 | |
The Android Open Source Project | 1059253 | 2009-03-18 17:39:46 -0700 | [diff] [blame] | 361 | if (c == '\n') { |
| 362 | ; |
| 363 | } else if (c == '\t') { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 364 | w = Layout.nextTab(sub, start, end, w, null); |
| 365 | tab = true; |
The Android Open Source Project | 1059253 | 2009-03-18 17:39:46 -0700 | [diff] [blame] | 366 | } else if (c >= 0xD800 && c <= 0xDFFF && j + 1 < next) { |
| 367 | int emoji = Character.codePointAt(chs, j - start); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 368 | |
The Android Open Source Project | 1059253 | 2009-03-18 17:39:46 -0700 | [diff] [blame] | 369 | if (emoji >= MIN_EMOJI && emoji <= MAX_EMOJI) { |
| 370 | Bitmap bm = EMOJI_FACTORY. |
| 371 | getBitmapFromAndroidPua(emoji); |
| 372 | |
| 373 | if (bm != null) { |
Eric Fischer | 423f0e4 | 2009-03-27 18:04:12 -0700 | [diff] [blame] | 374 | Paint whichPaint; |
| 375 | |
| 376 | if (spanned == null) { |
| 377 | whichPaint = paint; |
| 378 | } else { |
| 379 | whichPaint = mWorkPaint; |
| 380 | } |
| 381 | |
Doug Felt | 4e0c5e5 | 2010-03-15 16:56:02 -0700 | [diff] [blame^] | 382 | float wid = bm.getWidth() * |
Eric Fischer | 423f0e4 | 2009-03-27 18:04:12 -0700 | [diff] [blame] | 383 | -whichPaint.ascent() / |
| 384 | bm.getHeight(); |
| 385 | |
| 386 | w += wid; |
The Android Open Source Project | 1059253 | 2009-03-18 17:39:46 -0700 | [diff] [blame] | 387 | tab = true; |
| 388 | j++; |
| 389 | } else { |
| 390 | w += widths[j - start + (end - start)]; |
| 391 | } |
| 392 | } else { |
| 393 | w += widths[j - start + (end - start)]; |
| 394 | } |
| 395 | } else { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 396 | w += widths[j - start + (end - start)]; |
| 397 | } |
| 398 | |
| 399 | // Log.e("text", "was " + before + " now " + w + " after " + c + " within " + width); |
| 400 | |
| 401 | if (w <= width) { |
| 402 | fitwidth = w; |
| 403 | fit = j + 1; |
| 404 | |
| 405 | if (fmtop < fittop) |
| 406 | fittop = fmtop; |
| 407 | if (fmascent < fitascent) |
| 408 | fitascent = fmascent; |
| 409 | if (fmdescent > fitdescent) |
| 410 | fitdescent = fmdescent; |
| 411 | if (fmbottom > fitbottom) |
| 412 | fitbottom = fmbottom; |
| 413 | |
| 414 | /* |
| 415 | * From the Unicode Line Breaking Algorithm: |
| 416 | * (at least approximately) |
Doug Felt | 4e0c5e5 | 2010-03-15 16:56:02 -0700 | [diff] [blame^] | 417 | * |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 418 | * .,:; are class IS: breakpoints |
| 419 | * except when adjacent to digits |
| 420 | * / is class SY: a breakpoint |
| 421 | * except when followed by a digit. |
| 422 | * - is class HY: a breakpoint |
| 423 | * except when followed by a digit. |
| 424 | * |
Eric Fischer | 549d724 | 2009-03-31 14:19:47 -0700 | [diff] [blame] | 425 | * Ideographs are class ID: breakpoints when adjacent, |
| 426 | * except for NS (non-starters), which can be broken |
| 427 | * after but not before. |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 428 | */ |
| 429 | |
| 430 | if (c == ' ' || c == '\t' || |
| 431 | ((c == '.' || c == ',' || c == ':' || c == ';') && |
| 432 | (j - 1 < here || !Character.isDigit(chs[j - 1 - start])) && |
| 433 | (j + 1 >= next || !Character.isDigit(chs[j + 1 - start]))) || |
| 434 | ((c == '/' || c == '-') && |
| 435 | (j + 1 >= next || !Character.isDigit(chs[j + 1 - start]))) || |
Eric Fischer | 549d724 | 2009-03-31 14:19:47 -0700 | [diff] [blame] | 436 | (c >= FIRST_CJK && isIdeographic(c, true) && |
| 437 | j + 1 < next && isIdeographic(chs[j + 1 - start], false))) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 438 | okwidth = w; |
| 439 | ok = j + 1; |
| 440 | |
| 441 | if (fittop < oktop) |
| 442 | oktop = fittop; |
| 443 | if (fitascent < okascent) |
| 444 | okascent = fitascent; |
| 445 | if (fitdescent > okdescent) |
| 446 | okdescent = fitdescent; |
| 447 | if (fitbottom > okbottom) |
| 448 | okbottom = fitbottom; |
| 449 | } |
| 450 | } else if (breakOnlyAtSpaces) { |
| 451 | if (ok != here) { |
| 452 | // Log.e("text", "output ok " + here + " to " +ok); |
| 453 | |
| 454 | while (ok < next && chs[ok - start] == ' ') { |
| 455 | ok++; |
| 456 | } |
| 457 | |
| 458 | v = out(source, |
| 459 | here, ok, |
| 460 | okascent, okdescent, oktop, okbottom, |
| 461 | v, |
| 462 | spacingmult, spacingadd, chooseht, |
| 463 | choosehtv, fm, tab, |
| 464 | needMultiply, start, chdirs, dir, easy, |
| 465 | ok == bufend, includepad, trackpad, |
| 466 | widths, start, end - start, |
| 467 | where, ellipsizedWidth, okwidth, |
| 468 | paint); |
| 469 | |
| 470 | here = ok; |
| 471 | } else { |
| 472 | // Act like it fit even though it didn't. |
| 473 | |
| 474 | fitwidth = w; |
| 475 | fit = j + 1; |
| 476 | |
| 477 | if (fmtop < fittop) |
| 478 | fittop = fmtop; |
| 479 | if (fmascent < fitascent) |
| 480 | fitascent = fmascent; |
| 481 | if (fmdescent > fitdescent) |
| 482 | fitdescent = fmdescent; |
| 483 | if (fmbottom > fitbottom) |
| 484 | fitbottom = fmbottom; |
| 485 | } |
| 486 | } else { |
| 487 | if (ok != here) { |
| 488 | // Log.e("text", "output ok " + here + " to " +ok); |
| 489 | |
| 490 | while (ok < next && chs[ok - start] == ' ') { |
| 491 | ok++; |
| 492 | } |
| 493 | |
| 494 | v = out(source, |
| 495 | here, ok, |
| 496 | okascent, okdescent, oktop, okbottom, |
| 497 | v, |
| 498 | spacingmult, spacingadd, chooseht, |
| 499 | choosehtv, fm, tab, |
| 500 | needMultiply, start, chdirs, dir, easy, |
| 501 | ok == bufend, includepad, trackpad, |
| 502 | widths, start, end - start, |
| 503 | where, ellipsizedWidth, okwidth, |
| 504 | paint); |
| 505 | |
| 506 | here = ok; |
| 507 | } else if (fit != here) { |
| 508 | // Log.e("text", "output fit " + here + " to " +fit); |
| 509 | v = out(source, |
| 510 | here, fit, |
| 511 | fitascent, fitdescent, |
| 512 | fittop, fitbottom, |
| 513 | v, |
| 514 | spacingmult, spacingadd, chooseht, |
| 515 | choosehtv, fm, tab, |
| 516 | needMultiply, start, chdirs, dir, easy, |
| 517 | fit == bufend, includepad, trackpad, |
| 518 | widths, start, end - start, |
| 519 | where, ellipsizedWidth, fitwidth, |
| 520 | paint); |
| 521 | |
| 522 | here = fit; |
| 523 | } else { |
| 524 | // Log.e("text", "output one " + here + " to " +(here + 1)); |
| 525 | measureText(paint, mWorkPaint, |
| 526 | source, here, here + 1, fm, tab, |
| 527 | null); |
| 528 | |
| 529 | v = out(source, |
| 530 | here, here+1, |
| 531 | fm.ascent, fm.descent, |
| 532 | fm.top, fm.bottom, |
| 533 | v, |
| 534 | spacingmult, spacingadd, chooseht, |
| 535 | choosehtv, fm, tab, |
| 536 | needMultiply, start, chdirs, dir, easy, |
| 537 | here + 1 == bufend, includepad, |
| 538 | trackpad, |
| 539 | widths, start, end - start, |
| 540 | where, ellipsizedWidth, |
| 541 | widths[here - start], paint); |
| 542 | |
| 543 | here = here + 1; |
| 544 | } |
| 545 | |
| 546 | if (here < i) { |
| 547 | j = next = here; // must remeasure |
| 548 | } else { |
| 549 | j = here - 1; // continue looping |
| 550 | } |
| 551 | |
| 552 | ok = fit = here; |
| 553 | w = 0; |
| 554 | fitascent = fitdescent = fittop = fitbottom = 0; |
| 555 | okascent = okdescent = oktop = okbottom = 0; |
| 556 | |
Mark Wagner | 7b5676e | 2009-10-16 11:44:23 -0700 | [diff] [blame] | 557 | if (--firstWidthLineCount <= 0) { |
| 558 | width = restwidth; |
| 559 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 560 | } |
| 561 | } |
| 562 | } |
| 563 | |
| 564 | if (end != here) { |
| 565 | if ((fittop | fitbottom | fitdescent | fitascent) == 0) { |
| 566 | paint.getFontMetricsInt(fm); |
| 567 | |
| 568 | fittop = fm.top; |
| 569 | fitbottom = fm.bottom; |
| 570 | fitascent = fm.ascent; |
| 571 | fitdescent = fm.descent; |
| 572 | } |
| 573 | |
| 574 | // Log.e("text", "output rest " + here + " to " + end); |
| 575 | |
| 576 | v = out(source, |
| 577 | here, end, fitascent, fitdescent, |
| 578 | fittop, fitbottom, |
| 579 | v, |
| 580 | spacingmult, spacingadd, chooseht, |
| 581 | choosehtv, fm, tab, |
| 582 | needMultiply, start, chdirs, dir, easy, |
| 583 | end == bufend, includepad, trackpad, |
| 584 | widths, start, end - start, |
| 585 | where, ellipsizedWidth, w, paint); |
| 586 | } |
| 587 | |
| 588 | start = end; |
| 589 | |
| 590 | if (end == bufend) |
| 591 | break; |
| 592 | } |
| 593 | |
| 594 | if (bufend == bufstart || source.charAt(bufend - 1) == '\n') { |
| 595 | // Log.e("text", "output last " + bufend); |
| 596 | |
| 597 | paint.getFontMetricsInt(fm); |
| 598 | |
| 599 | v = out(source, |
| 600 | bufend, bufend, fm.ascent, fm.descent, |
| 601 | fm.top, fm.bottom, |
| 602 | v, |
| 603 | spacingmult, spacingadd, null, |
| 604 | null, fm, false, |
| 605 | needMultiply, bufend, chdirs, DEFAULT_DIR, true, |
| 606 | true, includepad, trackpad, |
| 607 | widths, bufstart, 0, |
| 608 | where, ellipsizedWidth, 0, paint); |
| 609 | } |
| 610 | } |
| 611 | |
| 612 | private static final char FIRST_CJK = '\u2E80'; |
| 613 | /** |
| 614 | * Returns true if the specified character is one of those specified |
| 615 | * as being Ideographic (class ID) by the Unicode Line Breaking Algorithm |
| 616 | * (http://www.unicode.org/unicode/reports/tr14/), and is therefore OK |
| 617 | * to break between a pair of. |
Eric Fischer | 549d724 | 2009-03-31 14:19:47 -0700 | [diff] [blame] | 618 | * |
| 619 | * @param includeNonStarters also return true for category NS |
| 620 | * (non-starters), which can be broken |
| 621 | * after but not before. |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 622 | */ |
Eric Fischer | 549d724 | 2009-03-31 14:19:47 -0700 | [diff] [blame] | 623 | private static final boolean isIdeographic(char c, boolean includeNonStarters) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 624 | if (c >= '\u2E80' && c <= '\u2FFF') { |
| 625 | return true; // CJK, KANGXI RADICALS, DESCRIPTION SYMBOLS |
| 626 | } |
| 627 | if (c == '\u3000') { |
| 628 | return true; // IDEOGRAPHIC SPACE |
| 629 | } |
| 630 | if (c >= '\u3040' && c <= '\u309F') { |
Eric Fischer | 549d724 | 2009-03-31 14:19:47 -0700 | [diff] [blame] | 631 | if (!includeNonStarters) { |
| 632 | switch (c) { |
| 633 | case '\u3041': // # HIRAGANA LETTER SMALL A |
| 634 | case '\u3043': // # HIRAGANA LETTER SMALL I |
| 635 | case '\u3045': // # HIRAGANA LETTER SMALL U |
| 636 | case '\u3047': // # HIRAGANA LETTER SMALL E |
| 637 | case '\u3049': // # HIRAGANA LETTER SMALL O |
| 638 | case '\u3063': // # HIRAGANA LETTER SMALL TU |
| 639 | case '\u3083': // # HIRAGANA LETTER SMALL YA |
| 640 | case '\u3085': // # HIRAGANA LETTER SMALL YU |
| 641 | case '\u3087': // # HIRAGANA LETTER SMALL YO |
| 642 | case '\u308E': // # HIRAGANA LETTER SMALL WA |
| 643 | case '\u3095': // # HIRAGANA LETTER SMALL KA |
| 644 | case '\u3096': // # HIRAGANA LETTER SMALL KE |
| 645 | case '\u309B': // # KATAKANA-HIRAGANA VOICED SOUND MARK |
| 646 | case '\u309C': // # KATAKANA-HIRAGANA SEMI-VOICED SOUND MARK |
| 647 | case '\u309D': // # HIRAGANA ITERATION MARK |
| 648 | case '\u309E': // # HIRAGANA VOICED ITERATION MARK |
| 649 | return false; |
| 650 | } |
| 651 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 652 | return true; // Hiragana (except small characters) |
| 653 | } |
| 654 | if (c >= '\u30A0' && c <= '\u30FF') { |
Eric Fischer | 549d724 | 2009-03-31 14:19:47 -0700 | [diff] [blame] | 655 | if (!includeNonStarters) { |
| 656 | switch (c) { |
| 657 | case '\u30A0': // # KATAKANA-HIRAGANA DOUBLE HYPHEN |
| 658 | case '\u30A1': // # KATAKANA LETTER SMALL A |
| 659 | case '\u30A3': // # KATAKANA LETTER SMALL I |
| 660 | case '\u30A5': // # KATAKANA LETTER SMALL U |
| 661 | case '\u30A7': // # KATAKANA LETTER SMALL E |
| 662 | case '\u30A9': // # KATAKANA LETTER SMALL O |
| 663 | case '\u30C3': // # KATAKANA LETTER SMALL TU |
| 664 | case '\u30E3': // # KATAKANA LETTER SMALL YA |
| 665 | case '\u30E5': // # KATAKANA LETTER SMALL YU |
| 666 | case '\u30E7': // # KATAKANA LETTER SMALL YO |
| 667 | case '\u30EE': // # KATAKANA LETTER SMALL WA |
| 668 | case '\u30F5': // # KATAKANA LETTER SMALL KA |
| 669 | case '\u30F6': // # KATAKANA LETTER SMALL KE |
| 670 | case '\u30FB': // # KATAKANA MIDDLE DOT |
| 671 | case '\u30FC': // # KATAKANA-HIRAGANA PROLONGED SOUND MARK |
| 672 | case '\u30FD': // # KATAKANA ITERATION MARK |
| 673 | case '\u30FE': // # KATAKANA VOICED ITERATION MARK |
| 674 | return false; |
| 675 | } |
| 676 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 677 | return true; // Katakana (except small characters) |
| 678 | } |
| 679 | if (c >= '\u3400' && c <= '\u4DB5') { |
| 680 | return true; // CJK UNIFIED IDEOGRAPHS EXTENSION A |
| 681 | } |
| 682 | if (c >= '\u4E00' && c <= '\u9FBB') { |
| 683 | return true; // CJK UNIFIED IDEOGRAPHS |
| 684 | } |
| 685 | if (c >= '\uF900' && c <= '\uFAD9') { |
| 686 | return true; // CJK COMPATIBILITY IDEOGRAPHS |
| 687 | } |
| 688 | if (c >= '\uA000' && c <= '\uA48F') { |
| 689 | return true; // YI SYLLABLES |
| 690 | } |
| 691 | if (c >= '\uA490' && c <= '\uA4CF') { |
| 692 | return true; // YI RADICALS |
| 693 | } |
| 694 | if (c >= '\uFE62' && c <= '\uFE66') { |
| 695 | return true; // SMALL PLUS SIGN to SMALL EQUALS SIGN |
| 696 | } |
| 697 | if (c >= '\uFF10' && c <= '\uFF19') { |
| 698 | return true; // WIDE DIGITS |
| 699 | } |
| 700 | |
| 701 | return false; |
| 702 | } |
| 703 | |
| 704 | /* |
| 705 | private static void dump(byte[] data, int count, String label) { |
| 706 | if (false) { |
| 707 | System.out.print(label); |
| 708 | |
| 709 | for (int i = 0; i < count; i++) |
| 710 | System.out.print(" " + data[i]); |
| 711 | |
| 712 | System.out.println(); |
| 713 | } |
| 714 | } |
| 715 | */ |
| 716 | |
| 717 | private static int getFit(TextPaint paint, |
| 718 | TextPaint workPaint, |
| 719 | CharSequence text, int start, int end, |
| 720 | float wid) { |
| 721 | int high = end + 1, low = start - 1, guess; |
| 722 | |
| 723 | while (high - low > 1) { |
| 724 | guess = (high + low) / 2; |
| 725 | |
| 726 | if (measureText(paint, workPaint, |
| 727 | text, start, guess, null, true, null) > wid) |
| 728 | high = guess; |
| 729 | else |
| 730 | low = guess; |
| 731 | } |
| 732 | |
| 733 | if (low < start) |
| 734 | return start; |
| 735 | else |
| 736 | return low; |
| 737 | } |
| 738 | |
| 739 | private int out(CharSequence text, int start, int end, |
| 740 | int above, int below, int top, int bottom, int v, |
| 741 | float spacingmult, float spacingadd, |
| 742 | LineHeightSpan[] chooseht, int[] choosehtv, |
| 743 | Paint.FontMetricsInt fm, boolean tab, |
| 744 | boolean needMultiply, int pstart, byte[] chdirs, |
| 745 | int dir, boolean easy, boolean last, |
| 746 | boolean includepad, boolean trackpad, |
| 747 | float[] widths, int widstart, int widoff, |
| 748 | TextUtils.TruncateAt ellipsize, float ellipsiswidth, |
| 749 | float textwidth, TextPaint paint) { |
| 750 | int j = mLineCount; |
| 751 | int off = j * mColumns; |
| 752 | int want = off + mColumns + TOP; |
| 753 | int[] lines = mLines; |
| 754 | |
| 755 | // Log.e("text", "line " + start + " to " + end + (last ? "===" : "")); |
| 756 | |
| 757 | if (want >= lines.length) { |
| 758 | int nlen = ArrayUtils.idealIntArraySize(want + 1); |
| 759 | int[] grow = new int[nlen]; |
| 760 | System.arraycopy(lines, 0, grow, 0, lines.length); |
| 761 | mLines = grow; |
| 762 | lines = grow; |
| 763 | |
| 764 | Directions[] grow2 = new Directions[nlen]; |
| 765 | System.arraycopy(mLineDirections, 0, grow2, 0, |
| 766 | mLineDirections.length); |
| 767 | mLineDirections = grow2; |
| 768 | } |
| 769 | |
| 770 | if (chooseht != null) { |
| 771 | fm.ascent = above; |
| 772 | fm.descent = below; |
| 773 | fm.top = top; |
| 774 | fm.bottom = bottom; |
| 775 | |
| 776 | for (int i = 0; i < chooseht.length; i++) { |
Eric Fischer | a9f1dd0 | 2009-08-12 15:00:10 -0700 | [diff] [blame] | 777 | if (chooseht[i] instanceof LineHeightSpan.WithDensity) { |
| 778 | ((LineHeightSpan.WithDensity) chooseht[i]). |
| 779 | chooseHeight(text, start, end, choosehtv[i], v, fm, paint); |
| 780 | |
| 781 | } else { |
| 782 | chooseht[i].chooseHeight(text, start, end, choosehtv[i], v, fm); |
| 783 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 784 | } |
| 785 | |
| 786 | above = fm.ascent; |
| 787 | below = fm.descent; |
| 788 | top = fm.top; |
| 789 | bottom = fm.bottom; |
| 790 | } |
| 791 | |
| 792 | if (j == 0) { |
| 793 | if (trackpad) { |
| 794 | mTopPadding = top - above; |
| 795 | } |
| 796 | |
| 797 | if (includepad) { |
| 798 | above = top; |
| 799 | } |
| 800 | } |
| 801 | if (last) { |
| 802 | if (trackpad) { |
| 803 | mBottomPadding = bottom - below; |
| 804 | } |
| 805 | |
| 806 | if (includepad) { |
| 807 | below = bottom; |
| 808 | } |
| 809 | } |
| 810 | |
| 811 | int extra; |
| 812 | |
| 813 | if (needMultiply) { |
Doug Felt | 1065758 | 2010-02-22 11:19:01 -0800 | [diff] [blame] | 814 | double ex = (below - above) * (spacingmult - 1) + spacingadd; |
| 815 | if (ex >= 0) { |
| 816 | extra = (int)(ex + 0.5); |
| 817 | } else { |
| 818 | extra = -(int)(-ex + 0.5); |
| 819 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 820 | } else { |
| 821 | extra = 0; |
| 822 | } |
| 823 | |
| 824 | lines[off + START] = start; |
| 825 | lines[off + TOP] = v; |
| 826 | lines[off + DESCENT] = below + extra; |
| 827 | |
| 828 | v += (below - above) + extra; |
| 829 | lines[off + mColumns + START] = end; |
| 830 | lines[off + mColumns + TOP] = v; |
| 831 | |
| 832 | if (tab) |
| 833 | lines[off + TAB] |= TAB_MASK; |
| 834 | |
Doug Felt | 9f7a444 | 2010-03-01 12:45:56 -0800 | [diff] [blame] | 835 | lines[off + DIR] |= dir << DIR_SHIFT; |
| 836 | Directions linedirs = DIRS_ALL_LEFT_TO_RIGHT; |
| 837 | // easy means all chars < the first RTL, so no emoji, no nothing |
Doug Felt | 4e0c5e5 | 2010-03-15 16:56:02 -0700 | [diff] [blame^] | 838 | // XXX a run with no text or all spaces is easy but might be an empty |
Doug Felt | 9f7a444 | 2010-03-01 12:45:56 -0800 | [diff] [blame] | 839 | // RTL paragraph. Make sure easy is false if this is the case. |
| 840 | if (easy) { |
| 841 | mLineDirections[j] = linedirs; |
| 842 | } else { |
| 843 | int startOff = start - pstart; |
| 844 | int baseLevel = dir == DIR_LEFT_TO_RIGHT ? 0 : 1; |
| 845 | int curLevel = chdirs[startOff]; |
| 846 | int minLevel = curLevel; |
| 847 | int runCount = 1; |
| 848 | for (int i = start + 1; i < end; ++i) { |
| 849 | int level = chdirs[i - pstart]; |
| 850 | if (level != curLevel) { |
| 851 | curLevel = level; |
| 852 | ++runCount; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 853 | } |
| 854 | } |
Doug Felt | 4e0c5e5 | 2010-03-15 16:56:02 -0700 | [diff] [blame^] | 855 | |
Doug Felt | 9f7a444 | 2010-03-01 12:45:56 -0800 | [diff] [blame] | 856 | // add final run for trailing counter-directional whitespace |
| 857 | int visEnd = end; |
| 858 | if ((curLevel & 1) != (baseLevel & 1)) { |
| 859 | // look for visible end |
| 860 | while (--visEnd >= start) { |
| 861 | char ch = text.charAt(visEnd); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 862 | |
Doug Felt | 9f7a444 | 2010-03-01 12:45:56 -0800 | [diff] [blame] | 863 | if (ch == '\n') { |
| 864 | --visEnd; |
| 865 | break; |
| 866 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 867 | |
Doug Felt | 9f7a444 | 2010-03-01 12:45:56 -0800 | [diff] [blame] | 868 | if (ch != ' ' && ch != '\t') { |
| 869 | break; |
| 870 | } |
| 871 | } |
| 872 | ++visEnd; |
| 873 | if (visEnd != end) { |
| 874 | ++runCount; |
| 875 | } |
| 876 | } |
Doug Felt | 4e0c5e5 | 2010-03-15 16:56:02 -0700 | [diff] [blame^] | 877 | |
Doug Felt | 9f7a444 | 2010-03-01 12:45:56 -0800 | [diff] [blame] | 878 | if (runCount == 1 && minLevel == baseLevel) { |
| 879 | if ((minLevel & 1) != 0) { |
| 880 | linedirs = DIRS_ALL_RIGHT_TO_LEFT; |
| 881 | } |
| 882 | // we're done, only one run on this line |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 883 | } else { |
Doug Felt | 9f7a444 | 2010-03-01 12:45:56 -0800 | [diff] [blame] | 884 | int[] ld = new int[runCount * 2]; |
| 885 | int maxLevel = minLevel; |
| 886 | int levelBits = minLevel << RUN_LEVEL_SHIFT; |
| 887 | { |
| 888 | // Start of first pair is always 0, we write |
| 889 | // length then start at each new run, and the |
| 890 | // last run length after we're done. |
| 891 | int n = 1; |
| 892 | int prev = start; |
| 893 | curLevel = minLevel; |
| 894 | for (int i = start; i < visEnd; ++i) { |
| 895 | int level = chdirs[i - pstart]; |
| 896 | if (level != curLevel) { |
| 897 | curLevel = level; |
| 898 | if (level > maxLevel) { |
| 899 | maxLevel = level; |
| 900 | } else if (level < minLevel) { |
| 901 | minLevel = level; |
| 902 | } |
| 903 | // XXX ignore run length limit of 2^RUN_LEVEL_SHIFT |
| 904 | ld[n++] = (i - prev) | levelBits; |
| 905 | ld[n++] = i - start; |
| 906 | levelBits = curLevel << RUN_LEVEL_SHIFT; |
| 907 | prev = i; |
| 908 | } |
| 909 | } |
| 910 | ld[n] = (visEnd - prev) | levelBits; |
| 911 | if (visEnd < end) { |
| 912 | ld[++n] = visEnd - start; |
| 913 | ld[++n] = (end - visEnd) | (baseLevel << RUN_LEVEL_SHIFT); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 914 | } |
| 915 | } |
| 916 | |
Doug Felt | 9f7a444 | 2010-03-01 12:45:56 -0800 | [diff] [blame] | 917 | // See if we need to swap any runs. |
Doug Felt | 4e0c5e5 | 2010-03-15 16:56:02 -0700 | [diff] [blame^] | 918 | // If the min level run direction doesn't match the base |
Doug Felt | 9f7a444 | 2010-03-01 12:45:56 -0800 | [diff] [blame] | 919 | // direction, we always need to swap (at this point |
| 920 | // we have more than one run). |
| 921 | // Otherwise, we don't need to swap the lowest level. |
Doug Felt | 4e0c5e5 | 2010-03-15 16:56:02 -0700 | [diff] [blame^] | 922 | // Since there are no logically adjacent runs at the same |
Doug Felt | 9f7a444 | 2010-03-01 12:45:56 -0800 | [diff] [blame] | 923 | // level, if the max level is the same as the (new) min |
| 924 | // level, we have a series of alternating levels that |
| 925 | // is already in order, so there's no more to do. |
Doug Felt | 4e0c5e5 | 2010-03-15 16:56:02 -0700 | [diff] [blame^] | 926 | // |
Doug Felt | 9f7a444 | 2010-03-01 12:45:56 -0800 | [diff] [blame] | 927 | boolean swap; |
| 928 | if ((minLevel & 1) == baseLevel) { |
| 929 | minLevel += 1; |
| 930 | swap = maxLevel > minLevel; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 931 | } else { |
Doug Felt | 9f7a444 | 2010-03-01 12:45:56 -0800 | [diff] [blame] | 932 | swap = runCount > 1; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 933 | } |
Doug Felt | 9f7a444 | 2010-03-01 12:45:56 -0800 | [diff] [blame] | 934 | if (swap) { |
| 935 | for (int level = maxLevel - 1; level >= minLevel; --level) { |
| 936 | for (int i = 0; i < ld.length; i += 2) { |
| 937 | if (chdirs[startOff + ld[i]] >= level) { |
| 938 | int e = i + 2; |
| 939 | while (e < ld.length && chdirs[startOff + ld[e]] >= level) { |
| 940 | e += 2; |
| 941 | } |
| 942 | for (int low = i, hi = e - 2; low < hi; low += 2, hi -= 2) { |
| 943 | int x = ld[low]; ld[low] = ld[hi]; ld[hi] = x; |
| 944 | x = ld[low+1]; ld[low+1] = ld[hi+1]; ld[hi+1] = x; |
| 945 | } |
| 946 | i = e + 2; |
| 947 | } |
| 948 | } |
| 949 | } |
| 950 | } |
| 951 | linedirs = new Directions(ld); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 952 | } |
| 953 | |
| 954 | mLineDirections[j] = linedirs; |
| 955 | |
| 956 | // If ellipsize is in marquee mode, do not apply ellipsis on the first line |
| 957 | if (ellipsize != null && (ellipsize != TextUtils.TruncateAt.MARQUEE || j != 0)) { |
| 958 | calculateEllipsis(start, end, widths, widstart, widoff, |
| 959 | ellipsiswidth, ellipsize, j, |
| 960 | textwidth, paint); |
| 961 | } |
| 962 | } |
| 963 | |
| 964 | mLineCount++; |
| 965 | return v; |
| 966 | } |
| 967 | |
| 968 | private void calculateEllipsis(int linestart, int lineend, |
| 969 | float[] widths, int widstart, int widoff, |
| 970 | float avail, TextUtils.TruncateAt where, |
| 971 | int line, float textwidth, TextPaint paint) { |
| 972 | int len = lineend - linestart; |
| 973 | |
| 974 | if (textwidth <= avail) { |
| 975 | // Everything fits! |
| 976 | mLines[mColumns * line + ELLIPSIS_START] = 0; |
| 977 | mLines[mColumns * line + ELLIPSIS_COUNT] = 0; |
| 978 | return; |
| 979 | } |
| 980 | |
| 981 | float ellipsiswid = paint.measureText("\u2026"); |
| 982 | int ellipsisStart, ellipsisCount; |
| 983 | |
| 984 | if (where == TextUtils.TruncateAt.START) { |
| 985 | float sum = 0; |
| 986 | int i; |
| 987 | |
| 988 | for (i = len; i >= 0; i--) { |
| 989 | float w = widths[i - 1 + linestart - widstart + widoff]; |
| 990 | |
| 991 | if (w + sum + ellipsiswid > avail) { |
| 992 | break; |
| 993 | } |
| 994 | |
| 995 | sum += w; |
| 996 | } |
| 997 | |
| 998 | ellipsisStart = 0; |
| 999 | ellipsisCount = i; |
| 1000 | } else if (where == TextUtils.TruncateAt.END || where == TextUtils.TruncateAt.MARQUEE) { |
| 1001 | float sum = 0; |
| 1002 | int i; |
| 1003 | |
| 1004 | for (i = 0; i < len; i++) { |
| 1005 | float w = widths[i + linestart - widstart + widoff]; |
| 1006 | |
| 1007 | if (w + sum + ellipsiswid > avail) { |
| 1008 | break; |
| 1009 | } |
| 1010 | |
| 1011 | sum += w; |
| 1012 | } |
| 1013 | |
| 1014 | ellipsisStart = i; |
| 1015 | ellipsisCount = len - i; |
| 1016 | } else /* where = TextUtils.TruncateAt.MIDDLE */ { |
| 1017 | float lsum = 0, rsum = 0; |
| 1018 | int left = 0, right = len; |
| 1019 | |
| 1020 | float ravail = (avail - ellipsiswid) / 2; |
| 1021 | for (right = len; right >= 0; right--) { |
| 1022 | float w = widths[right - 1 + linestart - widstart + widoff]; |
| 1023 | |
| 1024 | if (w + rsum > ravail) { |
| 1025 | break; |
| 1026 | } |
| 1027 | |
| 1028 | rsum += w; |
| 1029 | } |
| 1030 | |
| 1031 | float lavail = avail - ellipsiswid - rsum; |
| 1032 | for (left = 0; left < right; left++) { |
| 1033 | float w = widths[left + linestart - widstart + widoff]; |
| 1034 | |
| 1035 | if (w + lsum > lavail) { |
| 1036 | break; |
| 1037 | } |
| 1038 | |
| 1039 | lsum += w; |
| 1040 | } |
| 1041 | |
| 1042 | ellipsisStart = left; |
| 1043 | ellipsisCount = right - left; |
| 1044 | } |
| 1045 | |
| 1046 | mLines[mColumns * line + ELLIPSIS_START] = ellipsisStart; |
| 1047 | mLines[mColumns * line + ELLIPSIS_COUNT] = ellipsisCount; |
| 1048 | } |
| 1049 | |
| 1050 | // Override the baseclass so we can directly access our members, |
| 1051 | // rather than relying on member functions. |
| 1052 | // The logic mirrors that of Layout.getLineForVertical |
| 1053 | // FIXME: It may be faster to do a linear search for layouts without many lines. |
| 1054 | public int getLineForVertical(int vertical) { |
| 1055 | int high = mLineCount; |
| 1056 | int low = -1; |
| 1057 | int guess; |
| 1058 | int[] lines = mLines; |
| 1059 | while (high - low > 1) { |
| 1060 | guess = (high + low) >> 1; |
| 1061 | if (lines[mColumns * guess + TOP] > vertical){ |
| 1062 | high = guess; |
| 1063 | } else { |
| 1064 | low = guess; |
| 1065 | } |
| 1066 | } |
| 1067 | if (low < 0) { |
| 1068 | return 0; |
| 1069 | } else { |
| 1070 | return low; |
| 1071 | } |
| 1072 | } |
| 1073 | |
| 1074 | public int getLineCount() { |
| 1075 | return mLineCount; |
| 1076 | } |
| 1077 | |
| 1078 | public int getLineTop(int line) { |
Doug Felt | 4e0c5e5 | 2010-03-15 16:56:02 -0700 | [diff] [blame^] | 1079 | return mLines[mColumns * line + TOP]; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1080 | } |
| 1081 | |
| 1082 | public int getLineDescent(int line) { |
Doug Felt | 4e0c5e5 | 2010-03-15 16:56:02 -0700 | [diff] [blame^] | 1083 | return mLines[mColumns * line + DESCENT]; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1084 | } |
| 1085 | |
| 1086 | public int getLineStart(int line) { |
| 1087 | return mLines[mColumns * line + START] & START_MASK; |
| 1088 | } |
| 1089 | |
| 1090 | public int getParagraphDirection(int line) { |
| 1091 | return mLines[mColumns * line + DIR] >> DIR_SHIFT; |
| 1092 | } |
| 1093 | |
| 1094 | public boolean getLineContainsTab(int line) { |
| 1095 | return (mLines[mColumns * line + TAB] & TAB_MASK) != 0; |
| 1096 | } |
| 1097 | |
| 1098 | public final Directions getLineDirections(int line) { |
| 1099 | return mLineDirections[line]; |
| 1100 | } |
| 1101 | |
| 1102 | public int getTopPadding() { |
| 1103 | return mTopPadding; |
| 1104 | } |
| 1105 | |
| 1106 | public int getBottomPadding() { |
| 1107 | return mBottomPadding; |
| 1108 | } |
| 1109 | |
| 1110 | @Override |
| 1111 | public int getEllipsisCount(int line) { |
| 1112 | if (mColumns < COLUMNS_ELLIPSIZE) { |
| 1113 | return 0; |
| 1114 | } |
| 1115 | |
| 1116 | return mLines[mColumns * line + ELLIPSIS_COUNT]; |
| 1117 | } |
| 1118 | |
| 1119 | @Override |
| 1120 | public int getEllipsisStart(int line) { |
| 1121 | if (mColumns < COLUMNS_ELLIPSIZE) { |
| 1122 | return 0; |
| 1123 | } |
| 1124 | |
| 1125 | return mLines[mColumns * line + ELLIPSIS_START]; |
| 1126 | } |
| 1127 | |
| 1128 | @Override |
| 1129 | public int getEllipsizedWidth() { |
| 1130 | return mEllipsizedWidth; |
| 1131 | } |
| 1132 | |
| 1133 | private int mLineCount; |
| 1134 | private int mTopPadding, mBottomPadding; |
| 1135 | private int mColumns; |
| 1136 | private int mEllipsizedWidth; |
| 1137 | |
| 1138 | private static final int COLUMNS_NORMAL = 3; |
| 1139 | private static final int COLUMNS_ELLIPSIZE = 5; |
| 1140 | private static final int START = 0; |
| 1141 | private static final int DIR = START; |
| 1142 | private static final int TAB = START; |
| 1143 | private static final int TOP = 1; |
| 1144 | private static final int DESCENT = 2; |
| 1145 | private static final int ELLIPSIS_START = 3; |
| 1146 | private static final int ELLIPSIS_COUNT = 4; |
| 1147 | |
| 1148 | private int[] mLines; |
| 1149 | private Directions[] mLineDirections; |
| 1150 | |
| 1151 | private static final int START_MASK = 0x1FFFFFFF; |
| 1152 | private static final int DIR_MASK = 0xC0000000; |
| 1153 | private static final int DIR_SHIFT = 30; |
| 1154 | private static final int TAB_MASK = 0x20000000; |
| 1155 | |
| 1156 | private static final char FIRST_RIGHT_TO_LEFT = '\u0590'; |
| 1157 | |
| 1158 | /* |
| 1159 | * These are reused across calls to generate() |
| 1160 | */ |
| 1161 | private byte[] mChdirs; |
| 1162 | private char[] mChs; |
| 1163 | private float[] mWidths; |
| 1164 | private Paint.FontMetricsInt mFontMetricsInt = new Paint.FontMetricsInt(); |
| 1165 | } |