add aria_div element

Author: sspickle

lib/glow/primitives.js

@@ -3079,6 +3079,39 @@
         return cfieldset
     }
 
+    function aria_div(args) { // a form fieldset
+        if (!(this instanceof aria_div)) return new aria_div(args)  // so aria_div() is like new aria_div()
+        var cvs = canvas.get_selected()
+        var attrs = {pos:cvs.caption_anchor, aria_live:""}
+
+        for (a in attrs) {
+            if (args[a] !== undefined) {
+                attrs[a] = args[a]
+                delete args[a]
+            }
+        }
+
+        attrs.jdiv = $(`<div aria-live="${attrs.aria_live}">`).appendTo(attrs.pos)
+        
+        var caria_div = { // this structure implements a JavaScript "closure"
+            get aria_live() {   
+                if (attrs.aria_live === undefined) return ""
+                return attrs.aria_live
+            },
+            set aria_live(value) {
+                attrs.aria_live = value
+                $(attrs.jdiv).attr('aria-live', value)
+            },
+            get pos() {
+                return attrs.jdiv
+            },
+            set pos(value) {
+                throw new Error("Cannot change an aria_div's pos.")
+            }
+        }
+
+        return caria_div
+    }
 
     function checkbox(args) { // a checkbox
         if (!(this instanceof checkbox)) return new checkbox(args)  // so checkbox() is like new checkbox()
@@ -3727,6 +3760,7 @@
         winput: winput,
         radio: radio,
         fieldset:fieldset,
+        aria_div:aria_div,
         checkbox: checkbox,
         button: button,
         slider: slider,