1 /* 2 * ProGuard -- shrinking, optimization, obfuscation, and preverification 3 * of Java bytecode. 4 * 5 * Copyright (c) 2002-2014 Eric Lafortune (eric (at) graphics.cornell.edu) 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the Free 9 * Software Foundation; either version 2 of the License, or (at your option) 10 * any later version. 11 * 12 * This program is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15 * more details. 16 * 17 * You should have received a copy of the GNU General Public License along 18 * with this program; if not, write to the Free Software Foundation, Inc., 19 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 */ 21 package proguard.gui.splash; 22 23 /** 24 * This VariableString produces a String that grows linearly with respect to its 25 * Timing, as if it is being written on a typewriter. A cursor at the end 26 * precedes the typed characters. 27 * 28 * @author Eric Lafortune 29 */ 30 public class TypeWriterString implements VariableString 31 { 32 private final String string; 33 private final Timing timing; 34 35 private int cachedLength = -1; 36 private String cachedString; 37 38 39 /** 40 * Creates a new TypeWriterString. 41 * @param string the basic String. 42 * @param timing the applied timing. 43 */ 44 public TypeWriterString(String string, Timing timing) 45 { 46 this.string = string; 47 this.timing = timing; 48 } 49 50 51 // Implementation for VariableString. 52 53 public String getString(long time) 54 { 55 double t = timing.getTiming(time); 56 57 int stringLength = string.length(); 58 int length = (int)(stringLength * t + 0.5); 59 if (length != cachedLength) 60 { 61 cachedLength = length; 62 cachedString = string.substring(0, length); 63 if (t > 0.0 && length < stringLength) 64 { 65 cachedString += "_"; 66 } 67 } 68 69 return cachedString; 70 } 71 } 72
