Prevent blank names from being entered

popup.js

@@ -81,6 +81,7 @@ function renderWindow(windowdata, winnum) {
         var input = element('input', {
             _parent: namestringspan,
             value:name,
+            "data-original":name,
             type:"text",
             _onblur:function(ev){
                 if(ev && ev.keyCode) {
@@ -88,7 +89,17 @@ function renderWindow(windowdata, winnum) {
                         return
                     }
                 }
-                
+                if(this.value.trim().length==0) {
+                    this.value = this.getAttribute("data-original")
+                    this.focus()
+                    this.setSelectionRange(0,9999)
+                    this.classList.add("nope")
+                    var theinput = this
+                    setTimeout(function(){
+                        theinput.classList.remove("nope")
+                    }, 450)
+                    return
+                }
                 console.log("Rename window #"+winnum+" to "+this.value)
                 tabbro.ui_rename_window(winnum, this.value)
                 namestringspan.innerHTML = this.value

style.css

@@ -72,6 +72,24 @@ body {
     max-height: 700px;
     overflow-y: auto;
 }
+@-webkit-keyframes nopenopenope {
+    0% {
+        left: 0px;
+    }
+    25% {
+        left: -10px;
+    }
+    75% {
+        left: 10px;
+    }
+    100% {
+        left: 0px;
+    }
+}
+.nope {
+    position: relative;
+    -webkit-animation: nopenopenope .15s linear 0s 3 normal;
+}
 
 
 /* Options panel appears on hove */