| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| Compatibility |
|
| 7.0;7 |
| 1 | /* | |
| 2 | * FCKeditor - The text editor for Internet - http://www.fckeditor.net | |
| 3 | * Copyright (C) 2004-2010 Frederico Caldeira Knabben | |
| 4 | * | |
| 5 | * == BEGIN LICENSE == | |
| 6 | * | |
| 7 | * Licensed under the terms of any of the following licenses at your | |
| 8 | * choice: | |
| 9 | * | |
| 10 | * - GNU General Public License Version 2 or later (the "GPL") | |
| 11 | * http://www.gnu.org/licenses/gpl.html | |
| 12 | * | |
| 13 | * - GNU Lesser General Public License Version 2.1 or later (the "LGPL") | |
| 14 | * http://www.gnu.org/licenses/lgpl.html | |
| 15 | * | |
| 16 | * - Mozilla Public License Version 1.1 or later (the "MPL") | |
| 17 | * http://www.mozilla.org/MPL/MPL-1.1.html | |
| 18 | * | |
| 19 | * == END LICENSE == | |
| 20 | */ | |
| 21 | package net.fckeditor.tool; | |
| 22 | ||
| 23 | import java.util.regex.Matcher; | |
| 24 | import java.util.regex.Pattern; | |
| 25 | ||
| 26 | import javax.servlet.http.HttpServletRequest; | |
| 27 | ||
| 28 | import net.fckeditor.FCKeditor; | |
| 29 | ||
| 30 | /** | |
| 31 | * Checks browser compatibility with the {@link FCKeditor editor}. | |
| 32 | * | |
| 33 | * @version $Id: Compatibility.java 4785 2009-12-21 20:10:28Z mosipov $ | |
| 34 | */ | |
| 35 | 0 | public class Compatibility { |
| 36 | ||
| 37 | /** | |
| 38 | * Checks if a browser's user agent string is compatible with the FCKeditor. | |
| 39 | * | |
| 40 | * @param userAgentString | |
| 41 | * the user agent string of a browser | |
| 42 | * @return <code>true</code> if compatible, else <code>false</code> | |
| 43 | */ | |
| 44 | public static boolean check(final String userAgentString) { | |
| 45 | 18 | if (Utils.isEmpty(userAgentString)) |
| 46 | 0 | return false; |
| 47 | ||
| 48 | 18 | String userAgentStr = userAgentString.toLowerCase(); |
| 49 | ||
| 50 | // IE 5.5+, check special keys like 'Opera' and 'mac', because there are | |
| 51 | // some | |
| 52 | // other browsers, containing 'MSIE' in there agent string! | |
| 53 | 18 | if (userAgentStr.indexOf("opera") < 0 |
| 54 | && userAgentStr.indexOf("mac") < 0 | |
| 55 | && getBrowserVersion(userAgentStr, ".*msie ([\\d]+.[\\d]+).*") >= 5.5f) | |
| 56 | 4 | return true; |
| 57 | ||
| 58 | // for all gecko based browsers | |
| 59 | 14 | if (getBrowserVersion(userAgentStr, ".*rv:([\\d]+.[\\d]+).*") > 1.7f) |
| 60 | 4 | return true; |
| 61 | ||
| 62 | // Opera 9.5+ | |
| 63 | 10 | if (getBrowserVersion(userAgentStr, "opera/([\\d]+.[\\d]+).*") >= 9.5f |
| 64 | || getBrowserVersion(userAgentStr, ".*opera ([\\d]+.[\\d]+)") >= 9.5f) | |
| 65 | 2 | return true; |
| 66 | ||
| 67 | // Safari 3+ | |
| 68 | 8 | if (getBrowserVersion(userAgentStr, ".*applewebkit/([\\d]+).*") >= 522f) |
| 69 | 3 | return true; |
| 70 | ||
| 71 | 5 | return false; |
| 72 | } | |
| 73 | ||
| 74 | /** | |
| 75 | * Returns <code>true</code> if a browser is compatible by its request | |
| 76 | * user-agent header. | |
| 77 | * | |
| 78 | * @see #check(String) | |
| 79 | * @param request | |
| 80 | * current user request instance | |
| 81 | * @return <code>true</code> if a browser is compatible, else | |
| 82 | * <code>false</code> | |
| 83 | */ | |
| 84 | public static boolean isCompatibleBrowser(final HttpServletRequest request) { | |
| 85 | 0 | return (request == null) ? false : check(request |
| 86 | .getHeader("user-agent")); | |
| 87 | } | |
| 88 | ||
| 89 | /** | |
| 90 | * Helper method to get the browser version from 'userAgent' with regex. The | |
| 91 | * first matching group has to be the version number! | |
| 92 | * | |
| 93 | * @param userAgentString | |
| 94 | * the user agent string of a browser | |
| 95 | * @param regex | |
| 96 | * the pattern to retrieve the browser version | |
| 97 | * @return the browser version, or -1f if version can't be determined | |
| 98 | */ | |
| 99 | private static float getBrowserVersion(final String userAgentString, | |
| 100 | final String regex) { | |
| 101 | 50 | Pattern pattern = Pattern.compile(regex); |
| 102 | 50 | Matcher matcher = pattern.matcher(userAgentString); |
| 103 | 50 | if (matcher.matches()) { |
| 104 | try { | |
| 105 | 17 | return Float.parseFloat(matcher.group(1)); |
| 106 | 0 | } catch (NumberFormatException e) { |
| 107 | 0 | return -1f; |
| 108 | } | |
| 109 | } | |
| 110 | 33 | return -1f; |
| 111 | } | |
| 112 | ||
| 113 | } |