Extract functions in keyhandler.js file

MauricioFauth · MauricioFauth · commit 0c1859477d1a · 2022-06-25T16:30:42.000-03:00
Signed-off-by: Maurício Meneghini Fauth &lt;mauricio@fauth.dev&gt;
diff --git a/js/src/keyhandler.js b/js/src/keyhandler.js
@@ -1,13 +1,13 @@
 
-// global var that holds: 0- if ctrl key is not pressed 1- if ctrl key is pressed
-var ctrlKeyHistory = 0;
+// var that holds: 0- if ctrl key is not pressed 1- if ctrl key is pressed
+let ctrlKeyHistory = 0;
 
 /**
   * Allows moving around inputs/select by Ctrl+arrows
   *
   * @param {object} event data
   */
-function onKeyDownArrowsHandler (event) {
+const onKeyDownArrowsHandler = function (event) {
     var e = event || window.event;
 
     var o = (e.srcElement || e.target);
@@ -76,13 +76,13 @@ function onKeyDownArrowsHandler (event) {
     var id = 'field_' + y + '_' + x;
 
     var nO = document.getElementById(id);
-    if (! nO) {
+    if (!nO) {
         id = 'field_' + y + '_' + x + '_0';
         nO = document.getElementById(id);
     }
 
     // skip non existent fields
-    if (! nO) {
+    if (!nO) {
         return;
     }
 
@@ -95,7 +95,7 @@ function onKeyDownArrowsHandler (event) {
     if (isFirefox) {
         var ffcheck = 0;
         var ffversion;
-        for (ffversion = 3 ; ffversion < 25 ; ffversion++) {
+        for (ffversion = 3; ffversion < 25; ffversion++) {
             var isFirefoxV24 = navigator.userAgent.toLowerCase().indexOf('firefox/' + ffversion) > -1;
             if (isFirefoxV24) {
                 ffcheck = 1;
@@ -123,18 +123,34 @@ function onKeyDownArrowsHandler (event) {
         nO.select();
     }
     e.returnValue = false;
-}
-
-window.AJAX.registerTeardown('keyhandler.js', function () {
-    $(document).off('keydown keyup', '#table_columns');
-    $(document).off('keydown keyup', 'table.insertRowTable');
-});
-
-window.AJAX.registerOnload('keyhandler.js', function () {
-    $(document).on('keydown keyup', '#table_columns', function (event) {
-        onKeyDownArrowsHandler(event.originalEvent);
-    });
-    $(document).on('keydown keyup', 'table.insertRowTable', function (event) {
-        onKeyDownArrowsHandler(event.originalEvent);
-    });
-});
+};
+
+const KeyHandlerEvents = {
+    /**
+     * @return {function}
+     */
+    off: function () {
+        return function () {
+            $(document).off('keydown keyup', '#table_columns');
+            $(document).off('keydown keyup', 'table.insertRowTable');
+        };
+    },
+    /**
+     * @return {function}
+     */
+    on: function () {
+        return function () {
+            $(document).on('keydown keyup', '#table_columns', function (event) {
+                onKeyDownArrowsHandler(event.originalEvent);
+            });
+            $(document).on('keydown keyup', 'table.insertRowTable', function (event) {
+                onKeyDownArrowsHandler(event.originalEvent);
+            });
+        };
+    }
+};
+
+window.KeyHandlerEvents = KeyHandlerEvents;
+
+window.AJAX.registerTeardown('keyhandler.js', window.KeyHandlerEvents.off());
+window.AJAX.registerOnload('keyhandler.js', window.KeyHandlerEvents.on());
