Don't show popup at beginning of input and only when there are results

editor/src/index.js

@@ -165,13 +165,21 @@ if (holder) {
                 let value = input.value
                 let end = input.selectionEnd
                 let start = value.lastIndexOf("[[", end)
+                if (start < 0) {
+                    return true
+                }
+
                 let linkEnd = value.lastIndexOf("]]", end - 1)
                 if (start < linkEnd) {
-                    return
+                    return true
                 }
                 let query = value.substring(start+2, end);
                 let results = search.search(query)
 
+                if (results.length === 0) {
+                    return true
+                }
+
                 let pos = getCaretCoordinates(input, value.selectionEnd, {})
                 let off = $(input).offset()
                 pos.top += off.top + pos.height
@@ -183,6 +191,7 @@ if (holder) {
                 var template = document.getElementById('link-template').innerHTML;
                 var rendered = Mustache.render(template, {results: results}, {}, ['[[', ']]']);
                 $lc.html(rendered).fadeIn()
+                return true
             })
         })