1 /* 2 * Copyright (C) 2017 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 com.android.ahat; 18 19 class HtmlEscaper { 20 /** 21 * Escape html characters in the input string. 22 */ escape(String text)23 public static String escape(String text) { 24 String specials = "&<>\'\""; 25 String[] replacements = new String[]{"&", "<", ">", "'", """}; 26 StringBuilder sb = null; 27 int low = 0; 28 for (int i = 0; i < text.length(); ++i) { 29 int s = specials.indexOf(text.charAt(i)); 30 if (s != -1) { 31 if (sb == null) { 32 sb = new StringBuilder(); 33 } 34 sb.append(text.substring(low, i)); 35 sb.append(replacements[s]); 36 low = i + 1; 37 } 38 } 39 if (sb == null) { 40 return text; 41 } 42 43 sb.append(text.substring(low)); 44 return sb.toString(); 45 } 46 } 47 48 49