/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
/**
* This script, when included in a html file, builds a neat breadcrumb trail
* based on its url. That is, if it doesn't contains bugs (I'm relatively
* sure it does).
*
* Typical usage:
* <script type="text/javascript" language="JavaScript" src="breadcrumbs.js"></script>
*
*@author <a href="mailto:leosimons@apache.org">Leo Simons</a> (main author)
*@author <a href="mailto:nicolaken@apache.org">Nicola Ken Barozzi</a> (integration in skin)
*@created July 12, 2002
*@version 1.0
*/
/**
* IE 5 on Mac doesn't know Array.push.
*
* Implement it - courtesy to fritz.
*/
var abc = new Array();
if (!abc.push) {
Array.prototype.push = function(what){this[this.length]=what}
}
/* ========================================================================
CONSTANTS
======================================================================== */
/**
* Two-dimensional array containing extra crumbs to place at the front of
* the trail. Specify first the name of the crumb, then the URI that belongs
* to it. You'll need to modify this for every domain or subdomain where
* you use this script (you can leave it as an empty array if you wish)
*/
var PREPREND_CRUMBS = new Array();
if(!("apache"=="")){
PREPREND_CRUMBS.push( new Array( "apache", "http://www.apache.org/" ) );
}
if(!("xml.apache"=="")){
PREPREND_CRUMBS.push( new Array( "ant.apache", "http://ant.apache.org/" ) );
}
if(!(""=="")){
PREPREND_CRUMBS.push( new Array( "", "" ) );
}
/**
* String to include between crumbs:
*/
var DISPLAY_SEPARATOR = " > ";
/**
* String to include at the beginning of the trail
*/
var DISPLAY_PREPREND = "";
/**
* String to include at the end of the trail
*/
var DISPLAY_POSTPREND = "";
/**
* CSS Class to use for a single crumb:
*/
var CSS_CLASS_CRUMB = "breadcrumb";
/**
* CSS Class to use for the complete trail:
*/
var CSS_CLASS_TRAIL = "breadcrumbTrail";
/**
* CSS Class to use for crumb separator:
*/
var CSS_CLASS_SEPARATOR = "crumbSeparator";
/**
* Array of strings containing common file extensions. We use this to
* determine what part of the url to ignore (if it contains one of the
* string specified here, we ignore it).
*/
var FILE_EXTENSIONS = new Array( ".html", ".htm", ".jsp", ".php", ".php3", ".php4" );
/**
* String that separates parts of the breadcrumb trail from each other.
* When this is no longer a slash, I'm sure I'll be old and grey.
*/
var PATH_SEPARATOR = "/";
/* ========================================================================
UTILITY FUNCTIONS
======================================================================== */
/**
* Capitalize first letter of the provided string and return the modified
* string.
*/
function sentenceCase( string )
{
var lower = string.toLowerCase();
return lower.substr(0,1).toUpperCase() + lower.substr(1);
}
/**
* Returns an array containing the names of all the directories in the
* current document URL
*/
function getDirectoriesInURL()
{
var trail = document.location.pathname.split( PATH_SEPARATOR );
// check whether last section is a file or a directory
var lastcrumb = trail[trail.length-1];
for( var i = 0; i < FILE_EXTENSIONS.length; i++ )
{
if( lastcrumb.indexOf( FILE_EXTENSIONS[i] ) )
{
// it is, remove it and send results
return trail.slice( 1, trail.length-1 );
}
}
// it's not; send the trail unmodified
return trail.slice( 1, trail.length );
}
/* ========================================================================
BREADCRUMB FUNCTIONALITY
======================================================================== */
/**
* Return a two-dimensional array describing the breadcrumbs based on the
* array of directories passed in.
*/
function getBreadcrumbs( dirs )
{
var prefix = "/";
var postfix = "/";
// the array we will return
var crumbs = new Array();
if( dirs != null )
{
for( var i = 0; i < dirs.length; i++ )
{
prefix += dirs[i] + postfix;
crumbs.push( new Array( dirs[i], prefix ) );
}
}
// preprend the PREPREND_CRUMBS
if(PREPREND_CRUMBS.length > 0 )
{
return PREPREND_CRUMBS.concat( crumbs );
}
return crumbs;
}
/**
* Return a string containing a simple text breadcrumb trail based on the
* two-dimensional array passed in.
*/
function getCrumbTrail( crumbs )
{
var xhtml = DISPLAY_PREPREND;
for( var i = 0; i < crumbs.length; i++ )
{
xhtml += '<a href="' + crumbs[i][1] + '" >';
xhtml += sentenceCase( crumbs[i][0] ) + '</a>';
if( i != (crumbs.length-1) )
{
xhtml += DISPLAY_SEPARATOR;
}
}
xhtml += DISPLAY_POSTPREND;
return xhtml;
}
/**
* Return a string containing an XHTML breadcrumb trail based on the
* two-dimensional array passed in.
*/
function getCrumbTrailXHTML( crumbs )
{
var xhtml = '<span class="' + CSS_CLASS_TRAIL + '">';
xhtml += DISPLAY_PREPREND;
for( var i = 0; i < crumbs.length; i++ )
{
xhtml += '<a href="' + crumbs[i][1] + '" class="' + CSS_CLASS_CRUMB + '">';
xhtml += sentenceCase( crumbs[i][0] ) + '</a>';
if( i != (crumbs.length-1) )
{
xhtml += '<span class="' + CSS_CLASS_SEPARATOR + '">' + DISPLAY_SEPARATOR + '</span>';
}
}
xhtml += DISPLAY_POSTPREND;
xhtml += '</span>';
return xhtml;
}
/* ========================================================================
PRINT BREADCRUMB TRAIL
======================================================================== */
// check if we're local; if so, only print the PREPREND_CRUMBS
if( document.location.href.toLowerCase().indexOf( "http://" ) == -1 )
{
document.write( getCrumbTrail( getBreadcrumbs() ) );
}
else
{
document.write( getCrumbTrail( getBreadcrumbs( getDirectoriesInURL() ) ) );
}
