1 files changed, 42 insertions, 0 deletions
diff --git a/www/wiki/resources/src/mediawiki.action/mediawiki.action.edit.editWarning.js b/www/wiki/resources/src/mediawiki.action/mediawiki.action.edit.editWarning.js
new file mode 100644
index 00000000..56dba703
--- /dev/null
+++ b/www/wiki/resources/src/mediawiki.action/mediawiki.action.edit.editWarning.js
@@ -0,0 +1,42 @@
+/*
+ * Javascript for module editWarning
+ */
+( function ( mw, $ ) {
+	'use strict';
+
+	$( function () {
+		var allowCloseWindow,
+			$textBox = $( '#wpTextbox1' ),
+			$summary = $( '#wpSummary' ),
+			$both = $textBox.add( $summary );
+
+		// Check if EditWarning is enabled and if we need it
+		if ( !mw.user.options.get( 'useeditwarning' ) ) {
+			return true;
+		}
+
+		// Save the original value of the text fields
+		$both.each( function ( index, element ) {
+			var $element = $( element );
+			$element.data( 'origtext', $element.textSelection( 'getContents' ) );
+		} );
+
+		allowCloseWindow = mw.confirmCloseWindow( {
+			test: function () {
+				// We use .textSelection, because editors might not have updated the form yet.
+				return mw.config.get( 'wgAction' ) === 'submit' ||
+					$textBox.data( 'origtext' ) !== $textBox.textSelection( 'getContents' ) ||
+					$summary.data( 'origtext' ) !== $summary.textSelection( 'getContents' );
+			},
+
+			message: mw.msg( 'editwarning-warning' ),
+			namespace: 'editwarning'
+		} );
+
+		// Add form submission handler
+		$( '#editform' ).submit( function () {
+			allowCloseWindow.release();
+		} );
+	} );
+
+}( mediaWiki, jQuery ) );