Fix multiple calls on message edit

masks/chat.html

@@ -999,34 +999,39 @@ function toggleEditButton()
 function editMessage()
 {
 	let $Editable = $(this);
-	if($Editable.prop('contenteditable') != 'true')
+	$Editable.prop('contenteditable', 'true').focus();
+
+	if($Editable.data('backup') == null)
 	{
 		$Editable
 			.data('backup', $Editable.text())
-			.prop('contenteditable', 'true')
-			.focus();
-
-		$Editable.on('focusout keydown', function(e) {
-			if(e.type == 'focusout' || e.which == 13) {
-				e.preventDefault();
-				$(this).prop('contenteditable', 'false');
-				databap.getInfo
-				(
-					'edit_message',
-					function(asResult)
-					{
-						refresh_chat();
-						$MsgInput.focus();
-					},
-					{message_id: $Editable.parents('p.U').data('id'), message: $Editable.text()},
-					'json',
-					function(textStatus)
-					{
-						databap.showError(textStatus);
+			.on('focusout keydown', function(e) {
+				if(e.type == 'focusout' || e.which == 13) {
+					e.preventDefault();
+					var sOldMsg = $Editable.data('backup');
+					var sNewMsg = $Editable.text();
+					if(sOldMsg != sNewMsg) {
+						$Editable.data('backup', sNewMsg);
+						$Editable.prop('contenteditable', 'false');
+						databap.getInfo
+						(
+							'edit_message',
+							function(asResult)
+							{
+								refresh_chat();
+								$MsgInput.focus();
+							},
+							{message_id: $Editable.parents('p.U').data('id'), message: sNewMsg},
+							'json',
+							function(textStatus)
+							{
+								$Editable.data('backup', sOldMsg);
+								databap.showError(textStatus);
+							}
+						);
 					}
-				);
-			}
-		});
+				}
+			});
 	}
 }