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/*
* jQuery Highlight Regex Plugin v0.1.2
*
* Based on highlight v3 by Johann Burkard
* http://johannburkard.de/blog/programming/javascript/highlight-javascript-text-higlighting-jquery-plugin.html
*
* (c) 2009-13 Jacob Rothstein
* MIT license
*/
;(function( $ ) {
var normalize = function( node ) {
if ( ! ( node && node.childNodes )) return
var children = $.makeArray( node.childNodes )
, prevTextNode = null
$.each( children, function( i, child ) {
if ( child.nodeType === 3 ) {
if ( child.nodeValue === "" ) {
node.removeChild( child )
} else if ( prevTextNode !== null ) {
prevTextNode.nodeValue += child.nodeValue;
node.removeChild( child )
} else {
prevTextNode = child
}
} else {
prevTextNode = null
if ( child.childNodes ) {
normalize( child )
}
}
})
}
$.fn.highlightRegex = function( regex, options ) {
if ( typeof regex === 'object' && !(regex.constructor.name == 'RegExp' || regex instanceof RegExp ) ) {
options = regex
regex = undefined
}
if ( typeof options === 'undefined' ) options = {}
options.className = options.className || 'highlight'
options.tagType = options.tagType || 'span'
options.attrs = options.attrs || {}
if ( typeof regex === 'undefined' || regex.source === '' ) {
$( this ).find( options.tagType + '.' + options.className ).each( function() {
$( this ).replaceWith( $( this ).text() )
normalize( $( this ).parent().get( 0 ))
})
} else {
$( this ).each( function() {
var elt = $( this ).get( 0 )
normalize( elt )
$.each( $.makeArray( elt.childNodes ), function( i, searchnode ) {
var spannode, middlebit, middleclone, pos, match, parent
normalize( searchnode )
if ( searchnode.nodeType == 3 ) {
// don't re-highlight the same node over and over
if ( $(searchnode).parent(options.tagType + '.' + options.className).length ) {
return;
}
while ( searchnode.data &&
( pos = searchnode.data.search( regex )) >= 0 ) {
match = searchnode.data.slice( pos ).match( regex )[ 0 ]
if ( match.length > 0 ) {
spannode = document.createElement( options.tagType )
spannode.className = options.className
$(spannode).attr(options.attrs)
parent = searchnode.parentNode
middlebit = searchnode.splitText( pos )
searchnode = middlebit.splitText( match.length )
middleclone = middlebit.cloneNode( true )
spannode.appendChild( middleclone )
parent.replaceChild( spannode, middlebit )
} else break
}
} else {
$( searchnode ).highlightRegex( regex, options )
}
})
})
}
return $( this )
}
})( jQuery );
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