WordPress Widget Logic plugin code generator

gistfile1.php

<?php

/*

These days I prefer the Dynamic Widgets plugin (http://wordpress.org/extend/plugins/dynamic-widgets/), because
it can accommodate sophisticated widget display rules in a GUI that clients can use. However, the Widget Logic
plugin (http://wordpress.org/extend/plugins/widget-logic/) still has its place. This bit of code will add
a "Widget Logic generator" to the Widgets page, which is useful if you use this plugin and have some users
who aren't comfortable with writing the simple PHP.

I don't use it anymore, it's provided as-is and won't be developed any more - but let me know if you find a bug!

*/

if ( is_admin() && function_exists( "widget_logic_expand_control" ) ) {
	add_action( 'sidebar_admin_page', 'slt_widget_logic_generator' );
	function slt_widget_logic_generator() { ?>
		<div class="wrap">
			<h2><?php _e( 'Widget Logic code generator' ); ?></h2>
		
			<form action="">
				<div>
					<p>
						<label for="wl-display"><?php _e( 'I want to...' ); ?></label>
						<select id="wl-display" name="wl-display">
							<option value="yes"><?php _e( 'display the widget' ); ?></option>
							<option value="no"><?php _e( 'not display the widget' ); ?></option>
						</select>
					</p>
				</div>
				<div>
					<p>
						on...&nbsp;&nbsp;
						<?php
						foreach ( array( "front", "posts", "pages", "categories" ) as $slt_object ) {
							echo '<label for="wl-object-' . $slt_object . '"><input type="checkbox" name="wl-object" id="wl-object-' . $slt_object . '" value="' . $slt_object . '" />';
							if ( $slt_object == "front" ) {
								echo ' ' . __( 'the front page' );
							} else if ( $slt_object == "categories" ) {
								echo ' ' . __( 'particular category archive lists' );
							} else {
								echo ' ' . __( "particular", 'slt-custom' ) . ' ' . $slt_object;
							}
							echo '</label>&nbsp;&nbsp;';
						}
						?>
					</p>
				</div>
				<?php foreach ( array( "post", "page" ) as $slt_postType ) { ?>
					<div id="wl-<?php echo $slt_postType; ?>s-select" style="display:none">
						<p>
							<label for="wl-<?php echo $slt_postType; ?>s"><?php _e( 'Select' ); ?> <?php echo $slt_postType; ?>(s)</label><br />
							<select id="wl-<?php echo $slt_postType; ?>s" name="wl-<?php echo $slt_postType; ?>s" multiple="multiple" size="10" style="height:auto">
								<?php
								if ( $slt_postType == "post" ) {
									$slt_posts = get_posts( 'numberposts=-1&posts_per_page=-1&orderby=date&order=desc' );
								} else {
									$slt_posts = get_pages( 'sort_column=menu_order' );
								}
								foreach ( $slt_posts as $slt_post ) {
									echo '<option value="' . $slt_post->ID . '">';
									if ( strlen( $slt_post->post_title ) > 50 ) {
										echo substr( $slt_post->post_title, 0, 50 ) . "&hellip;";
									} else {
										echo $slt_post->post_title;
									}
									echo '</option>';
								}
								?>
							</select>
						</p>
					</div>
				<?php } ?>
				<div id="wl-categories-select" style="display:none">
					<p>
						<label for="wl-categories"><?php _e( 'Select category / categories' ); ?></label><br />
						<select id="wl-categories" name="wl-categories" multiple="multiple" size="10" style="height:auto">
							<?php
							$slt_cats = get_categories();
							foreach ( $slt_cats as $slt_cat ) {
								echo '<option value="' . $slt_cat->term_id . '">';
								if ( strlen( $slt_cat->name ) > 50 ) {
									echo substr( $slt_cat->name, 0, 50 ) . "&hellip;";
								} else {
									echo $slt_cat->name;
								}
								echo '</option>';
							}
							?>
						</select>
					</p>
				</div>
				<div>
					<p><input type="button" id="wl-generate" name="wl-generate" value="  <?php _e( 'Generate Widget Logic!' ); ?>  " style="font-weight:bold" /></p>
				</div>
				<div>
					<p><input type="text" id="wl-output" name="wl-output" size="100" /></p>
				</div>
			</form>
			<script type="text/javascript">/* <![CDATA[ */
			jQuery( document ).ready( function($) {
				$( "#wl-output" ).click( function() { $( this ).select(); });
				$( "input[name='wl-object']" ).click( function() {
					if ( $( this ).val() == "posts" || $( this ).val() == "pages" || $( this ).val() == "categories" ) {
						if ( $( this ).is( ":checked" ) ) {
							$( "#wl-" + $( this ).val() + "-select" ).slideDown( "fast" );
						} else {
							$( "#wl-" + $( this ).val() + "-select" ).slideUp( "fast" );
						}
					}
				});
				$( "#wl-generate" ).click( function() {
					var output = [];
					var values;
					var conditional;
					$( "input[name='wl-object']:checked" ).each( function() {
						if ( $( this ).val() == "front" ) {
							output.push( "is_front_page()" );
						} else {
							switch ( $( this ).val() ) {
								case "posts": { conditional = "is_single"; break; }
								case "pages": { conditional = "is_page"; break; }
								case "categories": { conditional = "is_category"; break; }
							}
							values = $( '#wl-' + $( this ).val() + ' :selected' ).map( function() { return $(this).val(); } ).get();								
							output.push( conditional + "( array( " + values + " ) )" );
						}
					});
					output = output.join( ' || ' );
					if ( $( "#wl-display" ).val() == "no" ) output = "! ( " + output + " )";
					$( "#wl-output" ).val( output );
				});
			});
			/* ]]> */</script>

		</div>
	<?php
	}	
} // if ( function_exists( "widget_logic_expand_control" ) )