X-Git-Url: https://scripts.mit.edu/gitweb/autoinstallsdev/mediawiki.git/blobdiff_plain/87219ebd28426c6d21cb545233ee52f5f7af7dfd..18a6620945d02687fbcfc4c27355d952fd748b41:/resources/jquery/jquery.highlightText.js

diff --git a/resources/jquery/jquery.highlightText.js b/resources/jquery/jquery.highlightText.js
new file mode 100644
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+++ b/resources/jquery/jquery.highlightText.js
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+/**
+ * Plugin that highlights matched word partials in a given element
+ * TODO: add a function for restoring the previous text
+ * TODO: accept mappings for converting shortcuts like WP: to Wikipedia: 
+ */
+( function( $ ) {
+
+$.highlightText = {
+	
+	// Split our pattern string at spaces and run our highlight function on the results
+	splitAndHighlight: function( node, pat ) {
+		var patArray = pat.split(" ");
+		for ( var i = 0; i < patArray.length; i++ ) {
+			if ( patArray[i].length == 0 ) continue;
+			$.highlightText.innerHighlight( node, patArray[i] );
+		}
+		return node;
+	},
+	// scans a node looking for the pattern and wraps a span around each match 
+	innerHighlight: function( node, pat ) {
+		// if this is a text node
+		if ( node.nodeType == 3 ) {
+			// TODO - need to be smarter about the character matching here. 
+			// non latin characters can make regex think a new word has begun. 
+			// look for an occurence of our pattern and store the starting position 
+			var pos = node.data.search( new RegExp( "\\b" + $.escapeRE( pat ), "i" ) );
+			if ( pos >= 0 ) {
+				// create the span wrapper for the matched text
+				var spannode = document.createElement( 'span' );
+				spannode.className = 'highlight';
+				// shave off the characters preceding the matched text
+				var middlebit = node.splitText( pos );
+				// shave off any unmatched text off the end
+				middlebit.splitText( pat.length );
+				// clone for appending to our span
+				var middleclone = middlebit.cloneNode( true );
+				// append the matched text node to the span
+				spannode.appendChild( middleclone );
+				// replace the matched node, with our span-wrapped clone of the matched node
+				middlebit.parentNode.replaceChild( spannode, middlebit );
+			}
+		// if this is an element with childnodes, and not a script, style or an element we created
+		} else if ( node.nodeType == 1 && node.childNodes && !/(script|style)/i.test( node.tagName )
+				&& !( node.tagName.toLowerCase() == 'span' && node.className.match( /\bhighlight/ ) ) ) {
+			for ( var i = 0; i < node.childNodes.length; ++i ) {
+				// call the highlight function for each child node
+				$.highlightText.innerHighlight( node.childNodes[i], pat );
+			}
+		}
+	}
+};
+
+$.fn.highlightText = function( matchString ) {
+	return $( this ).each( function() {
+		var $this = $( this );
+		$this.data( 'highlightText', { originalText: $this.text() } );
+		$.highlightText.splitAndHighlight( this, matchString );
+	} );
+};
+
+} )( jQuery );
+