improve ui checkbox functionality

ts/base_ts.ts

@@ -6,6 +6,7 @@ var UNDO = new Object()
 var SERVER_CONNECTION = false
 var WS_AVAILABLE = false
 var ACTIVE_MENU_ID:string = ""
+var LAST_BULK_CHECKBOX:HTMLInputElement = null
 
 
 // Menü
@@ -182,6 +183,46 @@ function getAllSelectedChannels():string[] {
   return channels
 }
 
+function selectChannelRange(checkbox:HTMLInputElement, event:MouseEvent) {
+
+  if (BULK_EDIT == false || checkbox == undefined || checkbox == null) {
+    return
+  }
+
+  var table = document.getElementById("content_table")
+  if (table == null) {
+    return
+  }
+
+  var trs = table.getElementsByTagName("TR")
+  var visibleCheckboxes:HTMLInputElement[] = new Array()
+
+  for (var i = 1; i < trs.length; i++) {
+    if ((trs[i] as HTMLElement).style.display != "none") {
+      var bulkCheckbox = (trs[i] as HTMLTableRowElement).querySelector("input.bulk") as HTMLInputElement
+      if (bulkCheckbox != null) {
+        visibleCheckboxes.push(bulkCheckbox)
+      }
+    }
+  }
+
+  var currentIndex = visibleCheckboxes.indexOf(checkbox)
+  var previousIndex = -1
+  if (LAST_BULK_CHECKBOX != null) {
+    previousIndex = visibleCheckboxes.indexOf(LAST_BULK_CHECKBOX)
+  }
+
+  if (event != undefined && event.shiftKey == true && previousIndex > -1 && currentIndex > -1) {
+    var start = Math.min(previousIndex, currentIndex)
+    var end = Math.max(previousIndex, currentIndex)
+    for (var i = start; i <= end; i++) {
+      visibleCheckboxes[i].checked = checkbox.checked
+    }
+  }
+
+  LAST_BULK_CHECKBOX = checkbox
+}
+
 function selectAllChannels() {
 
   var bulk:Boolean = false
@@ -211,6 +252,7 @@ function selectAllChannels() {
 
   }
 
+  LAST_BULK_CHECKBOX = null
   return
 }
 
@@ -235,6 +277,7 @@ function bulkEdit() {
     (rows[i] as HTMLInputElement).checked = false
   }
 
+  LAST_BULK_CHECKBOX = null
   return
 }