BoringLayout.java revision 86fcef87b802ee58147127dc5cca940239a30404
19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2006 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage android.text; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.graphics.Canvas; 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.graphics.Paint; 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.graphics.Path; 2286fcef87b802ee58147127dc5cca940239a30404Eric Fischerimport android.text.style.ParagraphStyle; 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.FloatMath; 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A BoringLayout is a very simple Layout implementation for text that 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * fits on a single line and is all left-to-right characters. 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You will probably never want to make one of these yourself; 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * if you do, be sure to call {@link #isBoring} first to make sure 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the text meets the criteria. 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p>This class is used by widgets to control text layout. You should not need 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to use this class directly unless you are implementing your own widget 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * or custom display object, in which case 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you are encouraged to use a Layout instead of calling 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.graphics.Canvas#drawText(java.lang.CharSequence, int, int, float, float, android.graphics.Paint) 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Canvas.drawText()} directly.</p> 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class BoringLayout extends Layout implements TextUtils.EllipsizeCallback { 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static BoringLayout make(CharSequence source, 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TextPaint paint, int outerwidth, 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Alignment align, 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project float spacingmult, float spacingadd, 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project BoringLayout.Metrics metrics, boolean includepad) { 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new BoringLayout(source, paint, outerwidth, align, 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project spacingmult, spacingadd, metrics, 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project includepad); 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static BoringLayout make(CharSequence source, 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TextPaint paint, int outerwidth, 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Alignment align, 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project float spacingmult, float spacingadd, 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project BoringLayout.Metrics metrics, boolean includepad, 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TextUtils.TruncateAt ellipsize, int ellipsizedWidth) { 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new BoringLayout(source, paint, outerwidth, align, 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project spacingmult, spacingadd, metrics, 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project includepad, ellipsize, ellipsizedWidth); 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns a BoringLayout for the specified text, potentially reusing 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * this one if it is already suitable. The caller must make sure that 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * no one is still using this Layout. 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public BoringLayout replaceOrMake(CharSequence source, TextPaint paint, 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int outerwidth, Alignment align, 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project float spacingmult, float spacingadd, 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project BoringLayout.Metrics metrics, 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean includepad) { 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project replaceWith(source, paint, outerwidth, align, spacingmult, 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project spacingadd); 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mEllipsizedWidth = outerwidth; 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mEllipsizedStart = 0; 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mEllipsizedCount = 0; 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project init(source, paint, outerwidth, align, spacingmult, spacingadd, 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project metrics, includepad, true); 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return this; 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns a BoringLayout for the specified text, potentially reusing 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * this one if it is already suitable. The caller must make sure that 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * no one is still using this Layout. 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public BoringLayout replaceOrMake(CharSequence source, TextPaint paint, 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int outerwidth, Alignment align, 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project float spacingmult, float spacingadd, 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project BoringLayout.Metrics metrics, 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean includepad, 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TextUtils.TruncateAt ellipsize, 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int ellipsizedWidth) { 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean trust; 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (ellipsize == null || ellipsize == TextUtils.TruncateAt.MARQUEE) { 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project replaceWith(source, paint, outerwidth, align, spacingmult, 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project spacingadd); 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mEllipsizedWidth = outerwidth; 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mEllipsizedStart = 0; 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mEllipsizedCount = 0; 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project trust = true; 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project replaceWith(TextUtils.ellipsize(source, paint, ellipsizedWidth, 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ellipsize, true, this), 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project paint, outerwidth, align, spacingmult, 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project spacingadd); 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mEllipsizedWidth = ellipsizedWidth; 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project trust = false; 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project init(getText(), paint, outerwidth, align, spacingmult, spacingadd, 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project metrics, includepad, trust); 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return this; 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public BoringLayout(CharSequence source, 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TextPaint paint, int outerwidth, 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Alignment align, 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project float spacingmult, float spacingadd, 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project BoringLayout.Metrics metrics, boolean includepad) { 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super(source, paint, outerwidth, align, spacingmult, spacingadd); 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mEllipsizedWidth = outerwidth; 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mEllipsizedStart = 0; 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mEllipsizedCount = 0; 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project init(source, paint, outerwidth, align, spacingmult, spacingadd, 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project metrics, includepad, true); 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public BoringLayout(CharSequence source, 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TextPaint paint, int outerwidth, 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Alignment align, 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project float spacingmult, float spacingadd, 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project BoringLayout.Metrics metrics, boolean includepad, 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TextUtils.TruncateAt ellipsize, int ellipsizedWidth) { 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * It is silly to have to call super() and then replaceWith(), 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * but we can't use "this" for the callback until the call to 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * super() finishes. 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super(source, paint, outerwidth, align, spacingmult, spacingadd); 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean trust; 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (ellipsize == null || ellipsize == TextUtils.TruncateAt.MARQUEE) { 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mEllipsizedWidth = outerwidth; 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mEllipsizedStart = 0; 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mEllipsizedCount = 0; 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project trust = true; 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project replaceWith(TextUtils.ellipsize(source, paint, ellipsizedWidth, 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ellipsize, true, this), 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project paint, outerwidth, align, spacingmult, 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project spacingadd); 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mEllipsizedWidth = ellipsizedWidth; 1629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project trust = false; 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project init(getText(), paint, outerwidth, align, spacingmult, spacingadd, 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project metrics, includepad, trust); 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* package */ void init(CharSequence source, 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TextPaint paint, int outerwidth, 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Alignment align, 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project float spacingmult, float spacingadd, 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project BoringLayout.Metrics metrics, boolean includepad, 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean trustWidth) { 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int spacing; 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (source instanceof String && align == Layout.Alignment.ALIGN_NORMAL) { 1789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDirect = source.toString(); 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDirect = null; 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mPaint = paint; 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (includepad) { 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project spacing = metrics.bottom - metrics.top; 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project spacing = metrics.descent - metrics.ascent; 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (spacingmult != 1 || spacingadd != 0) { 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project spacing = (int)(spacing * spacingmult + spacingadd + 0.5f); 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBottom = spacing; 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (includepad) { 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDesc = spacing + metrics.top; 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mDesc = spacing + metrics.ascent; 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (trustWidth) { 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mMax = metrics.width; 2059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 2069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 2079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If we have ellipsized, we have to actually calculate the 2089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * width because the width that was passed in was for the 2099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * full text, not the ellipsized form. 2109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project synchronized (sTemp) { 2129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mMax = (int) (FloatMath.ceil(Styled.measureText(paint, sTemp, 2139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project source, 0, source.length(), 2149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project null))); 2159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (includepad) { 2199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mTopPadding = metrics.top - metrics.ascent; 2209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mBottomPadding = metrics.bottom - metrics.descent; 2219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns null if not boring; the width, ascent, and descent if boring. 2269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static Metrics isBoring(CharSequence text, 2289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TextPaint paint) { 2299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return isBoring(text, paint, null); 2309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns null if not boring; the width, ascent, and descent in the 2349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * provided Metrics object (or a new one if the provided one was null) 2359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * if boring. 2369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static Metrics isBoring(CharSequence text, TextPaint paint, 2389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Metrics metrics) { 2399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project char[] temp = TextUtils.obtain(500); 2409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int len = text.length(); 2419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean boring = true; 2429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project outer: 2449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < len; i += 500) { 2459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int j = i + 500; 2469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (j > len) 2489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project j = len; 2499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TextUtils.getChars(text, i, j, temp, 0); 2519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int n = j - i; 2539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int a = 0; a < n; a++) { 2559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project char c = temp[a]; 2569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (c == '\n' || c == '\t' || c >= FIRST_RIGHT_TO_LEFT) { 2589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boring = false; 2599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break outer; 2609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TextUtils.recycle(temp); 2659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 26686fcef87b802ee58147127dc5cca940239a30404Eric Fischer if (boring && text instanceof Spanned) { 26786fcef87b802ee58147127dc5cca940239a30404Eric Fischer Spanned sp = (Spanned) text; 26886fcef87b802ee58147127dc5cca940239a30404Eric Fischer Object[] styles = sp.getSpans(0, text.length(), ParagraphStyle.class); 26986fcef87b802ee58147127dc5cca940239a30404Eric Fischer if (styles.length > 0) { 27086fcef87b802ee58147127dc5cca940239a30404Eric Fischer boring = false; 27186fcef87b802ee58147127dc5cca940239a30404Eric Fischer } 27286fcef87b802ee58147127dc5cca940239a30404Eric Fischer } 27386fcef87b802ee58147127dc5cca940239a30404Eric Fischer 2749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (boring) { 2759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Metrics fm = metrics; 2769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (fm == null) { 2779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fm = new Metrics(); 2789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int wid; 2819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project synchronized (sTemp) { 2839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project wid = (int) (FloatMath.ceil(Styled.measureText(paint, sTemp, 2849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project text, 0, text.length(), fm))); 2859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fm.width = wid; 2879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return fm; 2889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 2899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return null; 2909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override public int getHeight() { 2949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mBottom; 2959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override public int getLineCount() { 2989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 1; 2999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override public int getLineTop(int line) { 3029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (line == 0) 3039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 3049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project else 3059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mBottom; 3069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override public int getLineDescent(int line) { 3099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mDesc; 3109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override public int getLineStart(int line) { 3139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (line == 0) 3149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return 0; 3159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project else 3169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return getText().length(); 3179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override public int getParagraphDirection(int line) { 3209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return DIR_LEFT_TO_RIGHT; 3219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override public boolean getLineContainsTab(int line) { 3249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 3259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override public float getLineMax(int line) { 3289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mMax; 3299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override public final Directions getLineDirections(int line) { 3329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return Layout.DIRS_ALL_LEFT_TO_RIGHT; 3339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getTopPadding() { 3369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mTopPadding; 3379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getBottomPadding() { 3409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mBottomPadding; 3419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getEllipsisCount(int line) { 3459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mEllipsizedCount; 3469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getEllipsisStart(int line) { 3509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mEllipsizedStart; 3519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getEllipsizedWidth() { 3559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mEllipsizedWidth; 3569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Override draw so it will be faster. 3599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 3609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void draw(Canvas c, Path highlight, Paint highlightpaint, 3619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int cursorOffset) { 3629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mDirect != null && highlight == null) { 3639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project c.drawText(mDirect, 0, mBottom - mDesc, mPaint); 3649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 3659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.draw(c, highlight, highlightpaint, cursorOffset); 3669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Callback for the ellipsizer to report what region it ellipsized. 3719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void ellipsized(int start, int end) { 3739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mEllipsizedStart = start; 3749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mEllipsizedCount = end - start; 3759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final char FIRST_RIGHT_TO_LEFT = '\u0590'; 3789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private String mDirect; 3809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private Paint mPaint; 3819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* package */ int mBottom, mDesc; // for Direct 3839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mTopPadding, mBottomPadding; 3849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private float mMax; 3859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mEllipsizedWidth, mEllipsizedStart, mEllipsizedCount; 3869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final TextPaint sTemp = 3889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project new TextPaint(); 3899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static class Metrics extends Paint.FontMetricsInt { 3919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int width; 3929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override public String toString() { 3949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return super.toString() + " width=" + width; 3959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 398