1 | /*
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2 | * Licensed to the Apache Software Foundation (ASF) under one or more
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3 | * contributor license agreements. See the NOTICE file distributed with
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4 | * this work for additional information regarding copyright ownership.
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5 | * The ASF licenses this file to You under the Apache License, Version 2.0
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6 | * (the "License"); you may not use this file except in compliance with
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7 | * the License. You may obtain a copy of the License at
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8 | *
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9 | * http://www.apache.org/licenses/LICENSE-2.0
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10 | *
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11 | * Unless required by applicable law or agreed to in writing, software
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12 | * distributed under the License is distributed on an "AS IS" BASIS,
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13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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14 | * See the License for the specific language governing permissions and
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15 | * limitations under the License.
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16 | *
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17 | */
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18 |
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19 | /**
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20 | * This script, when included in a html file, builds a neat breadcrumb trail
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21 | * based on its url. That is, if it doesn't contains bugs (I'm relatively
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22 | * sure it does).
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23 | *
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24 | * Typical usage:
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25 | * <script type="text/javascript" language="JavaScript" src="breadcrumbs.js"></script>
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26 | *
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27 | *@author <a href="mailto:[email protected]">Leo Simons</a> (main author)
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28 | *@author <a href="mailto:[email protected]">Nicola Ken Barozzi</a> (integration in skin)
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29 | *@created July 12, 2002
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30 | *@version 1.0
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31 | */
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32 |
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33 | /**
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34 | * IE 5 on Mac doesn't know Array.push.
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35 | *
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36 | * Implement it - courtesy to fritz.
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37 | */
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38 | var abc = new Array();
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39 | if (!abc.push) {
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40 | Array.prototype.push = function(what){this[this.length]=what}
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41 | }
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42 |
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43 | /* ========================================================================
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44 | CONSTANTS
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45 | ======================================================================== */
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46 |
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47 | /**
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48 | * Two-dimensional array containing extra crumbs to place at the front of
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49 | * the trail. Specify first the name of the crumb, then the URI that belongs
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50 | * to it. You'll need to modify this for every domain or subdomain where
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51 | * you use this script (you can leave it as an empty array if you wish)
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52 | */
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53 | var PREPREND_CRUMBS = new Array();
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54 | if(!("apache"=="")){
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55 | PREPREND_CRUMBS.push( new Array( "apache", "http://www.apache.org/" ) );
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56 | }
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57 | if(!("xml.apache"=="")){
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58 | PREPREND_CRUMBS.push( new Array( "ant.apache", "http://ant.apache.org/" ) );
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59 | }
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60 | if(!(""=="")){
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61 | PREPREND_CRUMBS.push( new Array( "", "" ) );
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62 | }
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63 |
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64 | /**
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65 | * String to include between crumbs:
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66 | */
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67 | var DISPLAY_SEPARATOR = " > ";
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68 | /**
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69 | * String to include at the beginning of the trail
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70 | */
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71 | var DISPLAY_PREPREND = "";
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72 | /**
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73 | * String to include at the end of the trail
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74 | */
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75 | var DISPLAY_POSTPREND = "";
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76 |
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77 | /**
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78 | * CSS Class to use for a single crumb:
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79 | */
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80 | var CSS_CLASS_CRUMB = "breadcrumb";
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81 |
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82 | /**
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83 | * CSS Class to use for the complete trail:
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84 | */
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85 | var CSS_CLASS_TRAIL = "breadcrumbTrail";
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86 |
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87 | /**
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88 | * CSS Class to use for crumb separator:
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89 | */
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90 | var CSS_CLASS_SEPARATOR = "crumbSeparator";
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91 |
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92 | /**
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93 | * Array of strings containing common file extensions. We use this to
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94 | * determine what part of the url to ignore (if it contains one of the
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95 | * string specified here, we ignore it).
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96 | */
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97 | var FILE_EXTENSIONS = new Array( ".html", ".htm", ".jsp", ".php", ".php3", ".php4" );
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98 |
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99 | /**
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100 | * String that separates parts of the breadcrumb trail from each other.
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101 | * When this is no longer a slash, I'm sure I'll be old and grey.
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102 | */
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103 | var PATH_SEPARATOR = "/";
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104 |
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105 | /* ========================================================================
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106 | UTILITY FUNCTIONS
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107 | ======================================================================== */
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108 | /**
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109 | * Capitalize first letter of the provided string and return the modified
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110 | * string.
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111 | */
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112 | function sentenceCase( string )
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113 | {
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114 | var lower = string.toLowerCase();
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115 | return lower.substr(0,1).toUpperCase() + lower.substr(1);
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116 | }
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117 |
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118 | /**
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119 | * Returns an array containing the names of all the directories in the
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120 | * current document URL
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121 | */
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122 | function getDirectoriesInURL()
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123 | {
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124 | var trail = document.location.pathname.split( PATH_SEPARATOR );
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125 |
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126 | // check whether last section is a file or a directory
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127 | var lastcrumb = trail[trail.length-1];
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128 | for( var i = 0; i < FILE_EXTENSIONS.length; i++ )
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129 | {
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130 | if( lastcrumb.indexOf( FILE_EXTENSIONS[i] ) )
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131 | {
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132 | // it is, remove it and send results
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133 | return trail.slice( 1, trail.length-1 );
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134 | }
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135 | }
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136 |
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137 | // it's not; send the trail unmodified
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138 | return trail.slice( 1, trail.length );
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139 | }
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140 |
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141 | /* ========================================================================
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142 | BREADCRUMB FUNCTIONALITY
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143 | ======================================================================== */
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144 | /**
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145 | * Return a two-dimensional array describing the breadcrumbs based on the
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146 | * array of directories passed in.
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147 | */
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148 | function getBreadcrumbs( dirs )
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149 | {
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150 | var prefix = "/";
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151 | var postfix = "/";
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152 |
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153 | // the array we will return
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154 | var crumbs = new Array();
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155 |
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156 | if( dirs != null )
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157 | {
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158 | for( var i = 0; i < dirs.length; i++ )
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159 | {
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160 | prefix += dirs[i] + postfix;
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161 | crumbs.push( new Array( dirs[i], prefix ) );
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162 | }
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163 | }
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164 |
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165 | // preprend the PREPREND_CRUMBS
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166 | if(PREPREND_CRUMBS.length > 0 )
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167 | {
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168 | return PREPREND_CRUMBS.concat( crumbs );
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169 | }
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170 |
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171 | return crumbs;
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172 | }
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173 |
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174 | /**
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175 | * Return a string containing a simple text breadcrumb trail based on the
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176 | * two-dimensional array passed in.
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177 | */
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178 | function getCrumbTrail( crumbs )
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179 | {
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180 | var xhtml = DISPLAY_PREPREND;
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181 |
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182 | for( var i = 0; i < crumbs.length; i++ )
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183 | {
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184 | xhtml += '<a href="' + crumbs[i][1] + '" >';
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185 | xhtml += sentenceCase( crumbs[i][0] ) + '</a>';
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186 | if( i != (crumbs.length-1) )
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187 | {
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188 | xhtml += DISPLAY_SEPARATOR;
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189 | }
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190 | }
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191 |
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192 | xhtml += DISPLAY_POSTPREND;
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193 |
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194 | return xhtml;
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195 | }
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196 |
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197 | /**
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198 | * Return a string containing an XHTML breadcrumb trail based on the
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199 | * two-dimensional array passed in.
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200 | */
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201 | function getCrumbTrailXHTML( crumbs )
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202 | {
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203 | var xhtml = '<span class="' + CSS_CLASS_TRAIL + '">';
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204 | xhtml += DISPLAY_PREPREND;
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205 |
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206 | for( var i = 0; i < crumbs.length; i++ )
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207 | {
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208 | xhtml += '<a href="' + crumbs[i][1] + '" class="' + CSS_CLASS_CRUMB + '">';
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209 | xhtml += sentenceCase( crumbs[i][0] ) + '</a>';
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210 | if( i != (crumbs.length-1) )
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211 | {
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212 | xhtml += '<span class="' + CSS_CLASS_SEPARATOR + '">' + DISPLAY_SEPARATOR + '</span>';
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213 | }
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214 | }
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215 |
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216 | xhtml += DISPLAY_POSTPREND;
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217 | xhtml += '</span>';
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218 |
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219 | return xhtml;
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220 | }
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221 |
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222 | /* ========================================================================
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223 | PRINT BREADCRUMB TRAIL
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224 | ======================================================================== */
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225 |
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226 | // check if we're local; if so, only print the PREPREND_CRUMBS
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227 | if( document.location.href.toLowerCase().indexOf( "http://" ) == -1 )
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228 | {
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229 | document.write( getCrumbTrail( getBreadcrumbs() ) );
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230 | }
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231 | else
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232 | {
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233 | document.write( getCrumbTrail( getBreadcrumbs( getDirectoriesInURL() ) ) );
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234 | }
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235 |
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