MediaWiki:Gadget-HotCat.js

/* Script:  [[User:TheDJ/Gadget-HotCat.js]]
  * HotCat: Adds an easy way to add, modify and remove categories
  * Documentation: [[User:TheDJ/HotCat]]
  * Originally written by: Magnus Manske
  *
  * This version was forked from http://commons.wikimedia.org/w/index.php?title=MediaWiki:Gadget-HotCat.js&oldid=10204404
  * In sync with version: http://commons.wikimedia.org/w/index.php?title=MediaWiki:Gadget-HotCat.js&oldid=19600669
  * Major changes:
  *   - all code for the uploadForm has been removed
  *   - autocommit is disabled
  *   - will be enabled on pages without categories so that you can easily add them
  *   - uses javascript:void() as a dummy value for href in order to avoid a conflict with popups.
  *   - checks for {{Uncategorized}} and removes it if a category is added
  *   - does not use JSconfig for configuration options like its Commons original
  *   - tries to detect other categories and if possible, add to the end of them.
  *   - fixes a bug in the suggestion list with titles containing : character
  *   - Uses opensearch API to look for categories. Allows for case insensitive search.
  *   - Postfix blacklisting in addition to prefix blacklisting.
  * [[User:TheDJ]] 2009-04-18
  <source lang="javascript"><nowiki> */
var hotcat_running = 0;
var hotcat_last_v = '';
var hotcat_exists_yes = 'http://upload.wikimedia.org/wikipedia/commons/thumb/b/be/P_yes.svg/20px-P_yes.svg.png';
var hotcat_exists_no = 'http://upload.wikimedia.org/wikipedia/commons/thumb/4/42/P_no.svg/20px-P_no.svg.png';

var hotcat_no_autocommit = 0;
// In Commons hotcat_suggestion_delay is configurable trough JSconfig
var hotcat_suggestion_delay = 100;

var hotcat_old_onsubmit = null;
var hotcat_nosuggestions = false;
// hotcat_nosuggestions is set to true if we don't have XMLHttp! (On IE6, XMLHttp uses
// ActiveX, and the user may deny execution.) If true, no suggestions will ever be
// displayed, and there won't be any checking whether the category exists.
// Lupo, 2008-01-20

var hotcat_modify_blacklist = new Array(
	' stubs'
);

var hotcat_cnames = ['[Cc]ategory']; // namespaces and alias of category
									// in chinese: categoryNames=["[Cc]ategory","分类","分類"];

addOnloadHook( hotcat );

function hotcat() {
	if ( hotcat_check_action() ) {
		return; // Edited page, reloading anyway
	}

	// Do not add interface to protected pages, if user has no edit permission
	// Also disable it on preview pages: on a preview, we *are* already editing,
	// and HotCat must not open the page for editing a second time. Lupo, 2008-02-27
	if( wgAction != "view" || document.getElementById('ca-viewsource' ) != null ||
		wgNamespaceNumber == -1 || wgNamespaceNumber == 10 ) {
		return;
	}

	// If we have no Categories div, then add one
	// TheDJ, 2008-02-28
	var visible_catlinks = document.getElementById( 'mw-normal-catlinks' ) || getElementsByClassName( document, 'p', 'catlinks' )[0];
	var hidden_catlinks = document.getElementById( 'mw-hidden-catlinks' );

	if ( visible_catlinks == null || typeof( visible_catlinks ) == 'undefined' ) {
		d3 = document.createElement( 'div' );
		d3.id = 'mw-normal-catlinks';
		d3.innerHTML = '<a href="/wiki/Special:Categories" title="Special:Categories">Categories</a>: ';
		visible_catlinks = d3;

		if ( hidden_catlinks ) {
			// There are hidden categories.
			hidden_catlinks.parentNode.insertBefore( d3, hidden_catlinks );
			hidden_catlinks.parentNode.className = 'catlinks';
		} else {
			// This page has no categories at all, lets create a section where we can add them.
			var footer = getElementsByClassName( document, 'div', 'printfooter' )[0];
			if( !footer ) {
				return; // We have no idea where we should add this.
			}

			d1 = document.createElement( 'div' );
			d1.id = 'catlinks';
			d1.className = 'catlinks';
			d1.appendChild( d3 );
			footer.parentNode.insertBefore( d1, footer.nextSibling );
		}
	}

	hotcat_modify_existing( visible_catlinks );
	hotcat_append_add_span( visible_catlinks );
}

function hotcat_append_add_span( catline ) {
	var span_add = document.createElement( 'span' );
	var span_sep = document.createTextNode( ' | ' );
	if ( catline.getElementsByTagName( 'span' )[0] ) {
		catline.appendChild( span_sep );
	}
	catline.appendChild( span_add );
	hotcat_create_span( span_add );
}

String.prototype.ucFirst = function() {
	return this.substr( 0, 1 ).toUpperCase() + this.substr( 1, this.length );
}

function hotcat_is_on_blacklist( cat_title ) {
	if ( !cat_title ) {
		return 0;
	}
	for ( var i = 0; i < hotcat_modify_blacklist.length; i++ ) {
		/* prefix */
		if ( cat_title.substr( 0, hotcat_modify_blacklist[i].length )
			== hotcat_modify_blacklist[i]
		)
		{
			return 1;
		}
		/* postfix */
		var postfix_len = cat_title.length - hotcat_modify_blacklist[i].length;
		if ( postfix_len >= 0 && cat_title.substr( postfix_len, hotcat_modify_blacklist[i].length )
			== hotcat_modify_blacklist[i]
		)
		{
			return 1;
		}
	}
	return 0;
}

function hotcat_modify_span( span, i ) {
	//var cat_title = span.firstChild.getAttribute( 'title' );
	// This fails with MW 1.13alpha if the category is a redlink, because MW 1.13alpha appends
	// [[MediaWiki:Red-link-title]] to the category name... it also fails if the category name
	// contains "&" (because that is represented by &amp; in the XHTML both in the title and in
	// the link's content (innerHTML). Extract the category name from the href instead:
	var cat_title = null;
	var classes   = span.firstChild.getAttribute( 'class' );
	if ( classes && classes.search( /\bnew\b/) >= 0 ) { // href="/w/index.php?title=...&action=edit"
		cat_title = hotcatGetParamValue( 'title', span.firstChild.href );
	} else { // href="/wiki/..."
		var re = new RegExp( wgArticlePath.replace( /\$1/, '(.*)' ) );
		var matches = re.exec( span.firstChild.href );
		if ( matches && matches.length > 1 ) {
			cat_title = decodeURIComponent( matches[1] );
		} else {
			return;
		}
	}
	// Strip namespace, replace _ by blank
	cat_title = cat_title.substring( cat_title.indexOf( ':' ) + 1 ).replace( /_/g, ' ' );

	var sep1 = document.createTextNode( ' ' );
	var a1 = document.createTextNode( '(-)' );
	var remove_link = document.createElement( 'a' );
	// Set the href to a dummy value to make sure we don't move if somehow the onclick handler
	// is bypassed.
	remove_link.className = 'noprint';
	remove_link.href = '#catlinks';
	remove_link.onclick = hotcat_remove;
	remove_link.appendChild( a1 );
	span.appendChild( sep1 );
	span.appendChild( remove_link );

	if ( hotcat_is_on_blacklist( cat_title ) ) {
		return;
	}
	var mod_id = 'hotcat_modify_' + i;
	var sep2 = document.createTextNode( ' ' );
	var a2 = document.createTextNode( '(±)' );
	var modify_link = document.createElement( 'a' );
	modify_link.id = mod_id;
	modify_link.className = 'noprint';
	modify_link.href = 'javascript:hotcat_modify("' + mod_id + '");';
	modify_link.appendChild( a2 );
	span.appendChild( sep2 );
	span.appendChild( modify_link );
	span.hotcat_name = cat_title; // Store the extracted category name in our own new property of the span DOM node
}

function hotcat_modify_existing( catline ) {
	var spans = catline.getElementsByTagName( 'span' );
	for ( var i = 0; i < spans.length; i++ ) {
		hotcat_modify_span ( spans[i], i );
	}
}

function hotcat_getEvt( evt ) {
	return evt || window.event || window.Event; // Gecko, IE, Netscape
}

function hotcat_evt2node( evt ) {
	var node = null;
	try {
		var e = hotcat_getEvt( evt );
		node = e.target;
		if ( !node ) {
			node = e.srcElement;
		}
	} catch ( ex ) {
		node = null;
	}
	return node;
}

function hotcat_evtkeys( evt ) {
	var code = 0;
	try {
		var e = hotcat_getEvt( evt );
		if ( typeof( e.ctrlKey ) != 'undefined' ) { // All modern browsers
			if ( e.ctrlKey ) {
				code |= 1;
			}
			if ( e.shiftKey ) {
				code |= 2;
			}
			if ( e.altKey ) {
				code |= 4;
			}
		} else if ( typeof( e.modifiers ) != 'undefined' ) { // Netscape...
			if ( e.modifiers & Event.CONTROL_MASK ) {
				code |= 1;
			}
			if ( e.modifiers & Event.SHIFT_MASK ) {
				code |= 2;
			}
			if ( e.modifiers & Event.ALT_MASK ) {
				code |= 4;
			}
		}
	} catch ( ex ) {
	}
	return code;
}

function hotcat_killEvt( evt ) {
	try {
		var e = hotcat_getEvt( evt );
		if ( typeof( e.preventDefault ) != 'undefined' ) {
			e.preventDefault();
			e.stopPropagation()
		} else {
			e.cancelBubble = true;
		}
	} catch ( ex ) {
	}
}

function hotcat_remove( evt ) {
	var node = hotcat_evt2node( evt );
	if ( !node ) {
		return false;
	}
	// Get the category name from the original link to the category
	var cat_title = node.parentNode.hotcat_name;

	var editlk = wgServer + wgScript + '?title=' + encodeURIComponent( wgPageName ) + '&action=edit';
	if ( ( hotcat_evtkeys( evt ) & 1 ) || ( hotcat_evtkeys( evt ) & 4 ) ) { // CTRL or ALT pressed?
		editlk = editlk + '&hotcat_nocommit=1';
	}
	hotcat_killEvt( evt );
	document.location = editlk + '&hotcat_removecat=' + encodeURIComponent( cat_title );
	return false;
}

function hotcatGetParamValue( paramName, h ) {
	if ( typeof h == 'undefined' ) {
		h = document.location.href;
	}
	var cmdRe = RegExp( '[&?]' + paramName + '=([^&]*)' );
	var m = cmdRe.exec( h );
	if ( m ) {
		try {
			return decodeURIComponent( m[1] );
		} catch ( someError ) {}
	}
	return null;
}

// New. Code by Lupo & Superm401, added by Lupo, 2008-02-2007
function hotcat_find_category( wikitext, category ) {
	var cat_name  = category.replace( /([\\\^\$\.\?\*\+\(\)])/g, "\\$1" );
	var initial   = cat_name.substr( 0, 1 );
	var cat_regex = new RegExp(
		"\\[\\[\\s*(?:" + hotcat_cnames.join( '|' ) + ")\\s*:\\s*" +
		( initial == "\\" ? initial
			: '[' + initial.toUpperCase() + initial.toLowerCase() + ']' ) +
		cat_name.substring( 1 ).replace( /[ _]/g, '[ _]' ) +
		"\\s*(\\|.*?)?\\]\\]", 'g'
	);
	var result = new Array();
	var curr_match = null;
	while ( ( curr_match = cat_regex.exec( wikitext ) ) != null ) {
		result [result.length] = {match : curr_match};
	}
	return result; // An array containing all matches, with positions, in result[i].match
}

// New. Code by TheDJ, 2008-03-12
function hotcat_find_ins( wikitext ) {
	var re = new RegExp( "\\[\\[\\s*(?:" + hotcat_cnames.join( '|' ) + ")\\s*:\[^\\]\]+\\]\\]", 'ig' );
	var index = -1;
	while( re.exec( wikitext ) != null ) {
		index = re.lastIndex;
	}

	if( index > -1 ) {
		return index;
	}
	// we should try to find interwiki links here, but that's for later.

	return -1;
}

// Rewritten (nearly) from scratch. Lupo, 2008-02-27
function hotcat_check_action() {
	var ret = 0;
	if ( wgAction != 'edit' || typeof( document.editform ) == 'undefined' ) {
		// Not an edit page, so not our business...
		return ret;
	}
	var summary = new Array();
	var t = document.editform.wpTextbox1.value;
	var prevent_autocommit = 0;
	if ( ( typeof( hotcat_no_autocommit ) != 'undefined' && hotcat_no_autocommit )
		|| hotcatGetParamValue( 'hotcat_nocommit' ) == '1' )
	{
		prevent_autocommit = 1;
	}

	var cat_rm  = hotcatGetParamValue( 'hotcat_removecat' );
	var cat_add = hotcatGetParamValue( 'hotcat_newcat' );
	var comment = hotcatGetParamValue( 'hotcat_comment' ) || '';
	var cat_key = hotcatGetParamValue( 'hotcat_sortkey' );
	if ( cat_key != null ) {
		cat_key = '|' + cat_key;
	}

	if ( cat_rm != null && cat_rm.length > 0 ) {
		var matches = hotcat_find_category( t, cat_rm );
		if ( !matches || matches.length == 0 ) {
			alert( 'Category "' + cat_rm + '" not found; maybe it is in a template?' );
			prevent_autocommit = 1;
		} else if ( matches.length > 1 ) {
			alert( 'Category "' + cat_rm
				+ "\" found several times; don't know which occurrence to remove." );
			prevent_autocommit = 1;
		} else {
			if ( cat_add != null && cat_add.length > 0 && matches[0].match.length > 1 ) {
				cat_key = matches[0].match[1]; // Remember the category key, if any.
			}
			var t1 = t.substring( 0, matches[0].match.index );
			var t2 = t.substring( matches[0].match.index + matches[0].match[0].length );
			// Remove whitespace (properly): strip whitespace, but only up to the next line feed.
			// If we then have two linefeeds in a row, remove one. Otherwise, if we have two non-
			// whitespace characters, insert a blank.
			var i = t1.length - 1;
			while ( i >= 0 && t1.charAt( i ) != '\n' && t1.substr( i, 1 ).search( /\s/ ) >= 0 ) {
				i--;
			}
			var j = 0;
			while ( j < t2.length && t2.charAt( j ) != '\n' && t1.substr( j, 1 ).search( /\s/ ) >= 0 ) {
				j++;
			}
			if ( i >= 0 && t1.charAt( i ) == '\n' && j < t2.length && t2.charAt( j ) == '\n' ) {
				i--;
			}
			if ( i >= 0 ) {
				t1 = t1.substring( 0, i + 1 );
			} else {
				t1 = '';
			}
			if ( j < t2.length ) {
				t2 = t2.substring( j );
			} else {
				t2 = '';
			}
			if (
				t1.length > 0 && t1.substring( t1.length - 1 ).search( /\S/ ) >= 0
				&& t2.length > 0 && t2.substr( 0, 1 ).search( /\S/ ) >= 0
			)
			{
				t1 = t1 + ' ';
			}
			t = t1 + t2;
			summary.push( "Removed \[\[:Category:" + cat_rm + "\]\]" );
			ret = 1;
		}
	}
	if ( cat_add != null && cat_add.length > 0 ) {
		var matches = hotcat_find_category( t, cat_add );
		if ( matches && matches.length > 0 ) {
			alert( 'Category "' + cat_add + '" already exists; not added.' );
			prevent_autocommit = 1;
		} else {
			var insertionpoint = hotcat_find_ins( t );
			var newcatstring = '\n\[\[Category:' + cat_add + ( cat_key != null ? cat_key : '' ) + '\]\]';
			if( insertionpoint > -1 ) {
				t = t.substring( 0, insertionpoint ) + newcatstring + t.substring( insertionpoint );
			} else {
				t = t + newcatstring;
			}
			summary.push( "Adding category \[\[:Category:" + cat_add + "\]\]" + comment );
			var t2 = t.replace( /\{\{\s*([Uu]ncat(egori[sz]ed)?|[Nn]ocat|[Nn]eedscategory|[Cc]ategori[sz]e)[^}]*\}\}/g, '' ); // Remove "uncategorized" template
			if ( t2.length != t.length ) {
				t = t2;
				summary.push( 'removed {{uncategorized}}' );
			}
			ret = 1;
		}
	}
	if ( ret ) {
		document.editform.wpTextbox1.value = t;
		document.editform.wpSummary.value = summary.join( '; ' ) +
									' (using [[WP:HOTCAT|HotCat]])';
		document.editform.wpMinoredit.checked = true;
		if ( !prevent_autocommit ) {
			// Hide the entire edit section so as not to tempt the user into editing...
			var bodyContentId = document.getElementById( 'bodyContent' ) // monobook skin
				|| document.getElementById( 'mw_contentholder' ) // modern skin
				|| document.getElementById( 'article' );        // classic skin
			bodyContentId.style.display = 'none';
			document.editform.submit();
		}
	}
	return ret;
}

function hotcat_clear_span( span_add ) {
	while ( span_add.firstChild ) {
		span_add.removeChild( span_add.firstChild );
	}
}

function hotcat_create_span( span_add ) {
	hotcat_clear_span( span_add );
	var a_add = document.createElement( 'a' );
	var a_text = document.createTextNode( '(+)' );
	span_add.id = 'hotcat_add';
	a_add.className = 'noprint';
	a_add.href = 'javascript:hotcat_add_new()';
	a_add.appendChild( a_text );
	span_add.appendChild( a_add );
}

function hotcat_modify( link_id ) {
	var link = document.getElementById( link_id );
	var span = link.parentNode;
	var catname = span.hotcat_name;

	while ( span.firstChild.nextSibling ) {
		span.removeChild( span.firstChild.nextSibling );
	}
	span.firstChild.style.display = 'none';
	hotcat_create_new_span( span, catname );
	hotcat_last_v = '';
	hotcat_text_changed(); // Update icon
}

function hotcat_add_new() {
	var span_add = document.getElementById( 'hotcat_add' );
	hotcat_clear_span( span_add );
	hotcat_last_v = '';
	hotcat_create_new_span( span_add, '' );
}

function hotcat_create_new_span( thespan, init_text ) {
	var form = document.createElement( 'form' );
	form.method = 'post';
	form.onsubmit = function() {
		hotcat_ok();
		return false;
	};
	form.id = 'hotcat_form';
	form.style.display = 'inline';

	var list = null;

	if ( !hotcat_nosuggestions ) {
		// Only do this if we may actually use XMLHttp...
		list = document.createElement( 'select' );
		list.id = 'hotcat_list';
		list.onclick = function() {
			var l = document.getElementById( 'hotcat_list' );
			if ( l != null ) {
				document.getElementById( 'hotcat_text' ).value = l.options[l.selectedIndex].text;
			}
			hotcat_text_changed();
		};
		list.ondblclick = function( evt ) {
			var l = document.getElementById( 'hotcat_list' );
			if ( l != null ) {
				document.getElementById( 'hotcat_text' ).value = l.options[l.selectedIndex].text;
			}
			// Don't call text_changed here if on upload form: hotcat_ok will remove the list
			// anyway, so we must not ask for new suggestions since show_suggestions might
			// raise an exception if it tried to show a no longer existing list.
			// Lupo, 2008-01-20
			hotcat_text_changed();
			// CTRL or ALT pressed?
			hotcat_ok( ( hotcat_evtkeys( evt ) & 1 ) || ( hotcat_evtkeys( evt ) & 4 ) );
		};
		list.style.display = 'none';
	}

	var text = document.createElement( 'input' );
	text.size = 40;
	text.id = 'hotcat_text';
	text.type = 'text';
	text.value = init_text;
	text.onkeyup = function() {
		window.setTimeout( 'hotcat_text_changed();', hotcat_suggestion_delay );
	};

	var exists = null;
	if ( !hotcat_nosuggestions ) {
		exists = document.createElement( 'img' );
		exists.id = 'hotcat_exists';
		exists.src = hotcat_exists_no;
	}

	var OK = document.createElement( 'input' );
	OK.type = 'button';
	OK.value = 'OK';
	OK.onclick = function( evt ) {
		// CTRL or ALT pressed?
		hotcat_ok( ( hotcat_evtkeys( evt ) & 1 ) || ( hotcat_evtkeys( evt ) & 4 ) );
	};

	var cancel = document.createElement( 'input' );
	cancel.type = 'button';
	cancel.value = 'Cancel';
	cancel.onclick = hotcat_cancel;

	if ( list != null ) {
		form.appendChild( list );
	}
	form.appendChild( text );
	if ( exists != null ) {
		form.appendChild( exists );
	}
	form.appendChild( OK );
	form.appendChild( cancel );
	thespan.appendChild( form );
	text.focus();
}

function hotcat_ok( nocommit ) {
	var text = document.getElementById( 'hotcat_text' );
	var v = text.value || '';
	v = v.replace( /_/g, ' ' ).replace( /^\s\s*/, '' ).replace( /\s\s*$/, '' ); // Trim leading and trailing blanks

	// Empty category ?
	if ( !v ) {
		hotcat_cancel();
		return;
	} else if ( hotcat_is_on_blacklist( v ) ) {
		alert( 'This type of category needs to be added using a template' );
		return;
	}

	// Get the links and the categories of the chosen category page
	var url = wgServer + wgScriptPath + '/api.php?action=query&titles=' +
			encodeURIComponent( 'Category:' + v ) +
			'&prop=info|links|categories&plnamespace=14&format=json&callback=hotcat_json_resolve';
	var request = sajax_init_object();
	if ( request == null ) {
		// Oops! We don't have XMLHttp...
		hotcat_nosuggestions = true;
		hotcat_closeform( nocommit );
		hotcat_running = 0;
		return;
	}
	request.open( 'GET', url, true );
	request.onreadystatechange = function() {
		if ( request.readyState != 4 ) {
			return;
		}
		if ( request.status != 200 ) {
			hotcat_closeform( nocommit );
		} else {
			var do_submit = eval( request.responseText );
			var txt = document.getElementById( 'hotcat_text' );
			if ( do_submit ) {
				hotcat_closeform(
					nocommit,
					( txt && txt.value != v ) ? " (Redirect \[\[:Category:" + v + "\]\] resolved)" : null
				);
			}
		}
	};
	request.setRequestHeader( 'Pragma', 'cache=yes' );
	request.setRequestHeader( 'Cache-Control', 'no-transform' );
	request.send( null );
}

function hotcat_json_resolve( params ) {
	function resolve( page ) {
		var cats     = page.categories;
		var is_dab   = false;
		var is_redir = typeof( page.redirect ) == 'string'; // Hard redirect?
		if ( !is_redir && cats ) {
			for ( var c = 0; c < cats.length; c++ ) {
				var cat = cats[c]['title'];
				if ( cat ) {
					cat = cat.substring( cat.indexOf( ':' ) + 1 ); // Strip namespace prefix
				}
				if ( cat == 'Disambiguation' ) {
					is_dab = true;
					break;
				} else if ( /.*soft.redirected.categories.*/.test( cat ) ) {
					is_redir = true;
					break;
				}
			}
		}
		if ( !is_redir && !is_dab ) {
			return true;
		}
		var lks = page.links;
		var titles = new Array();
		for ( i = 0; i < lks.length; i++ ) {
			if ( lks[i]['ns'] == 14 /* Category namespace*/ && lks[i]['title']
				&& lks[i]['title'].length > 0 // Name not empty
			)
			{
				// Internal link to existing thingy. Extract the page name.
				var match = lks[i]['title'];
				// Remove the category prefix
				match = match.substring( match.indexOf( ':' ) + 1 );
				titles.push( match );
				if ( is_redir ) {
					break;
				}
			}
		}
		if ( titles.length > 1 ) {
			// Disambiguation page
			hotcat_show_suggestions( titles );
			return false;
		} else if ( titles.length == 1 ) {
			var text = document.getElementById( 'hotcat_text' );
			if ( text ) {
				text.value = titles[0];
			}
		}
		return true;
	} // end local function resolve

	// We should have at most one page here
	for ( var page in params.query.pages ) {
		return resolve( params.query.pages[page] );
	}
	return true; // In case we have none.
}

function hotcat_closeform( nocommit, comment ) {
	var text = document.getElementById( 'hotcat_text' );
	var v = text.value || '';
	v = v.replace( /_/g, ' ' ).replace( /^\s\s*/, '' ).replace( /\s\s*$/, '' ); // Trim leading and trailing blanks
	if ( !v /* Empty */ || wgNamespaceNumber == 14 && v == wgTitle /* Self-reference */
		|| text.parentNode.parentNode.id != 'hotcat_add'  // Modifying, but
		&& text.parentNode.parentNode.hotcat_name == v ) //   name unchanged
	{
		hotcat_cancel();
		return;
	}

	var editlk = wgServer + wgScript + '?title=' + encodeURIComponent( wgPageName ) + '&action=edit';
	var url = editlk + '&hotcat_newcat=' + encodeURIComponent( v );

	// Editing existing?
	var span = text.parentNode.parentNode; // span.form.text
	if ( span.id != 'hotcat_add' ) { // Not plain "addition"
		url += '&hotcat_removecat=' + encodeURIComponent( span.hotcat_name );
	}
	if ( nocommit ) {
		url = url + '&hotcat_nocommit=1';
	}
	if ( comment ) {
		url = url + '&hotcat_comment=' + encodeURIComponent( comment );
	}
	// Make the list disappear:
	var list = document.getElementById( 'hotcat_list' );
	if ( list ) {
		list.style.display = 'none';
	}

	document.location = url;
}

function hotcat_just_add( text ) {
	var span = document.getElementById( 'hotcat_form' );
	while ( span.tagName != 'SPAN' ) {
		span = span.parentNode;
	}
	var add = 0;
	if ( span.id == 'hotcat_add' ) {
		add = 1;
	}
	span.id = '';
	while ( span.firstChild ) {
		span.removeChild( span.firstChild );
	}
	var na = document.createElement( 'a' );
	na.href = wgArticlePath.split( '$1' ).join( 'Category:' + encodeURI( text ) );
	na.appendChild( document.createTextNode( text ) );
	na.setAttribute( 'title', 'Category:' + text );
	span.appendChild( na );
	var catline = getElementsByClassName( document, 'p', 'catlinks' )[0];
	if ( add ) {
		hotcat_append_add_span( catline );
	}

	for ( var i = 0; i < span.parentNode.childNodes.length; i++ ) {
		if ( span.parentNode.childNodes[i] != span ) {
			continue;
		}
		hotcat_modify_span( span, i );
		break;
	}
}

function hotcat_cancel() {
	var span = document.getElementById( 'hotcat_form' ).parentNode;
	if ( span.id == 'hotcat_add' ) {
		hotcat_create_span( span );
	} else {
		while ( span.firstChild.nextSibling ) {
			span.removeChild ( span.firstChild.nextSibling );
		}
		span.firstChild.style.display = '';
		for ( var i = 0; i < span.parentNode.childNodes.length; i++ ) {
			if ( span.parentNode.childNodes[i] != span ) {
				continue;
			}
			hotcat_modify_span( span, i );
			break;
		}
	}
}

function hotcat_text_changed() {
	if ( hotcat_running ) {
		return;
	}
	var text = document.getElementById( 'hotcat_text' );
	var v = text.value.ucFirst();
	if ( hotcat_last_v == v ) {
		// Nothing's changed...
		return;
	}

	if ( hotcat_nosuggestions ) {
		// On IE, XMLHttp uses ActiveX, and the user may deny execution... just make sure
		// the list is not displayed.
		var list = document.getElementById( 'hotcat_list' );
		if ( list != null ) {
			list.style.display = 'none';
		}
		var exists = document.getElementById( 'hotcat_exists' );
		if ( exists != null ) {
			exists.style.display = 'none';
		}
		return;
	}

	hotcat_running = 1;
	hotcat_last_v = v;

	if ( v != '' ) {
		var url = wgMWSuggestTemplate.replace( '{namespaces}', '14' )
									.replace( '{dbname}', wgDBname )
									.replace( '{searchTerms}', encodeURIComponent( v ) );
		var request = sajax_init_object();
		if ( request == null ) {
			// Oops! We don't have XMLHttp...
			hotcat_nosuggestions = true;
			var list = document.getElementById( 'hotcat_list' );
			if ( list != null ) {
				list.style.display = 'none';
			}
			var exists = document.getElementById( 'hotcat_exists' );
			if ( exists != null ) {
				exists.style.display = 'none';
			}
			hotcat_running = 0;
			return;
		}
		request.open( 'GET', url, true );
		request.onreadystatechange = function() {
			if ( request.readyState == 4 ) {
				try {
					eval( 'var queryResult=' + request.responseText );
				} catch( someError ) {
					if( console && console.log ) {
						console.log( 'Oh dear, our JSON query went down the drain?\nError: ' + someError );
					}
					return;
				}
				var pages = queryResult[1]; // results are *with* namespace here
				var titles = new Array();
				for ( var i = 0; pages && i < pages.length; i++ ) {
					// Remove the namespace. No hardcoding of 'Category:', please, other wikis may have
					// local names ("Kategorie:" on de-WP, for instance). Also don't break on category
					// names containing a colon
					var s = pages[i].substring( pages[i].indexOf( ':' ) + 1 );
					if ( s.substr( 0, hotcat_last_v.length ).toLowerCase() != hotcat_last_v.toLowerCase() ) {
						break;
					}
					titles.push( s );
				}
				hotcat_show_suggestions( titles );
			}
		};
		request.setRequestHeader( 'Pragma', 'cache=yes' );
		request.setRequestHeader( 'Cache-Control', 'no-transform' );
		request.send( null );
	} else {
		hotcat_show_suggestions( new Array () );
	}
	hotcat_running = 0;
}

function hotcat_show_suggestions( titles ) {
	var text = document.getElementById( 'hotcat_text' );
	var list = document.getElementById( 'hotcat_list' );
	var icon = document.getElementById( 'hotcat_exists' );
	// Somehow, after a double click on the selection list, we still get here in IE, but
	// the list may no longer exist... Lupo, 2008-01-20
	if ( list == null ) {
		return;
	}
	if ( hotcat_nosuggestions ) {
		list.style.display = 'none';
		if ( icon != null ) {
			icon.style.display = 'none';
		}
		return;
	}
	if ( titles.length == 0 ) {
		list.style.display = 'none';
		icon.src = hotcat_exists_no;
		return;
	}

	// Set list size to minimum of 5 and actual number of titles. Formerly was just 5.
	// Lupo, 2008-01-20
	list.size = ( titles.length > 5 ? 5 : titles.length );
	// Avoid list height 1: double-click doesn't work in FF. Lupo, 2008-02-27
	if ( list.size == 1 ) {
		list.size = 2;
	}
	list.style.align = 'left';
	list.style.zIndex = 5;
	list.style.position = 'absolute';

	// Was listh = titles.length * 20: that makes no sense if titles.length > list.size
	// Lupo, 2008-01-20
	var listh = list.size * 20;
	var nl = parseInt( text.offsetLeft ) - 1;
	var nt = parseInt( text.offsetTop ) - listh;
	if ( skin == 'nostalgia' || skin == 'cologneblue' || skin == 'standard' ) {
		// These three skins have the category line at the top of the page.
		// Make the suggestions appear *below* out input field.
		nt = parseInt( text.offsetTop ) + parseInt( text.offsetHeight ) + 3;
	}
	list.style.top = nt + 'px';
	list.style.width = text.offsetWidth + 'px';
	list.style.height = listh + 'px';
	list.style.left = nl + 'px';
	while ( list.firstChild ) {
		list.removeChild( list.firstChild );
	}
	for ( var i = 0; i < titles.length; i++ ) {
		var opt = document.createElement( 'option' );
		var ot = document.createTextNode( titles[i] );
		opt.appendChild( ot );
		//opt.value = titles[i];
		list.appendChild( opt );
	}

	icon.src = hotcat_exists_yes;

	var nof_titles = titles.length;
	var first_title = titles.shift ();
	var v = text.value.ucFirst();

	text.focus();
	if ( first_title == v ) {
		if( nof_titles == 1 ) {
			// Only one result, and it's the same as whatever is in the input box: makes no sense
			// to show the list.
			list.style.display = 'none';
		}
		return;
	}
	list.style.display = 'block';

	// Put the first entry of the title list into the text field, and select the
	// new suffix such that it'll be overwritten if the user keeps typing.
	// ONLY do this if we have a way to select parts of the content of a text
	// field, otherwise, this is very annoying for the user. Note: IE does it
	// again differently from the two versions previously implemented.
	// Lupo, 2008-01-20
	// Only put first entry into the list if the user hasn't typed something
	// conflicting yet Dschwen 2008-02-18
	if ( ( text.setSelectionRange || text.createTextRange ||
		typeof( text.selectionStart ) != 'undefined' &&
		typeof( text.selectionEnd ) != 'undefined' ) &&
		v == first_title.substr( 0, v.length ) )
	{
		// taking hotcat_last_v was a major annoyance,
		// since it constantly killed text that was typed in
		// _since_ the last AJAX request was fired! Dschwen 2008-02-18
		var nosel = v.length;

		text.value = first_title;

		if ( text.setSelectionRange ) { // e.g. khtml
			text.setSelectionRange( nosel, first_title.length );
		} else if ( text.createTextRange ) { // IE
			var new_selection = text.createTextRange();
			new_selection.move( 'character', nosel );
			new_selection.moveEnd( 'character', first_title.length - nosel );
			new_selection.select();
		} else {
			text.selectionStart = nosel;
			text.selectionEnd   = first_title.length;
		}
	}
}
/* </nowiki></source> */