Taxonomy: Add a "delete" button on term edit page.

Add a 'delete' link next to the update button on the term edit screen so you can delete a term while you are reviewing it's details. 

Props cklosows, bradt, ocean90, johnbillion, DrewAPicture, ryan, MatheusGimenez, maguiar.
Fixes #9777.



git-svn-id: https://develop.svn.wordpress.org/trunk@40655 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/css/common.css

@@ -874,7 +874,8 @@ hr {
 .submitbox .submitdelete,
 #media-items a.delete,
 #media-items a.delete-permanently,
-#nav-menu-footer .menu-delete {
+#nav-menu-footer .menu-delete,
+#delete-link a.delete  {
 	color: #a00;
 }
 
@@ -890,7 +891,8 @@ span.required,
 .submitbox .submitdelete:hover,
 #media-items a.delete:hover,
 #media-items a.delete-permanently:hover,
-#nav-menu-footer .menu-delete:hover {
+#nav-menu-footer .menu-delete:hover,
+#delete-link a.delete:hover {
 	color: #dc3232;
 	border: none;
 }
@@ -911,6 +913,17 @@ span.required,
 	line-height: 28px;
 }
 
+#delete-link {
+	line-height: 28px;
+	vertical-align: middle;
+	text-align: left;
+	margin-left: 8px;
+}
+
+#delete-link a {
+	text-decoration: none;
+}
+
 #publishing-action {
 	text-align: right;
 	float: right;

src/wp-admin/css/edit.css

@@ -1092,6 +1092,17 @@ p.popular-tags a {
 	text-decoration: underline;
 }
 
+#edittag {
+	max-width: 800px;
+}
+
+.edit-tag-actions {
+	margin-top: 20px;
+	overflow: hidden;
+	padding: 10px;
+	margin-right: 10px;
+}
+
 /* Comments */
 
 .comment-php .wp-editor-area {
@@ -1348,6 +1359,10 @@ table.links-table {
 }
 
 @media screen and ( max-width: 782px ) {
+	.wp-core-ui .edit-tag-actions .button-primary {
+		margin-bottom: 0;
+	}
+
 	#post-body-content {
 		min-width: 0;
 	}

src/wp-admin/edit-tag-form.php

@@ -254,9 +254,20 @@ if ( 'category' == $taxonomy ) {
  * @param string $taxonomy Current taxonomy slug.
  */
 do_action( "{$taxonomy}_edit_form", $tag, $taxonomy );
-
-submit_button( __('Update') );
 ?>
+
+<div class="edit-tag-actions">
+
+	<?php submit_button( __( 'Update' ), 'primary', null, false ); ?>
+
+	<?php if ( current_user_can( 'delete_term', $tag->term_id ) ) : ?>
+		<span id="delete-link">
+			<a class="delete" href="<?php echo admin_url( wp_nonce_url( "edit-tags.php?action=delete&taxonomy=$taxonomy&tag_ID=$tag->term_id", 'delete-tag_' . $tag->term_id ) ) ?>"'><?php _e( 'Delete' ); ?></a>
+		</span>
+	<?php endif; ?>
+
+</div>
+
 </form>
 </div>
 

src/wp-admin/edit-tags.php

@@ -65,7 +65,6 @@ if ( ! $referer ) { // For POST requests.
 	$referer = wp_unslash( $_SERVER['REQUEST_URI'] );
 }
 $referer = remove_query_arg( array( '_wp_http_referer', '_wpnonce', 'error', 'message', 'paged' ), $referer );
-
 switch ( $wp_list_table->current_action() ) {
 
 case 'add-tag':
@@ -107,6 +106,9 @@ case 'delete':
 
 	$location = add_query_arg( 'message', 2, $referer );
 
+	// When deleting a term, prevent the action from redirecting back to a term that no longer exists.
+	$location = remove_query_arg( array( 'tag_ID', 'action' ), $location );
+
 	break;
 
 case 'bulk-delete':

src/wp-admin/js/tags.js

@@ -28,6 +28,17 @@ jQuery(document).ready(function($) {
 		return false;
 	});
 
+	$( '#edittag' ).on( 'click', '.delete', function( e ) {
+		if ( 'undefined' === typeof showNotice ) {
+			return true;
+		}
+
+		var response = showNotice.warn();
+		if ( ! response ) {
+			e.preventDefault();
+		}
+	});
+
 	$('#submit').click(function(){
 		var form = $(this).parents('form');
 

src/wp-admin/term.php

@@ -62,7 +62,7 @@ get_current_screen()->set_screen_reader_content( array(
 	'heading_pagination' => $tax->labels->items_list_navigation,
 	'heading_list'       => $tax->labels->items_list,
 ) );
-
+wp_enqueue_script( 'admin-tags' );
 require_once( ABSPATH . 'wp-admin/admin-header.php' );
 include( ABSPATH . 'wp-admin/edit-tag-form.php' );
 include( ABSPATH . 'wp-admin/admin-footer.php' );