add static files

static/admin/js/collapse.js

@@ -0,0 +1,55 @@
+/*global gettext*/
+(function() {
+    'use strict';
+    var closestElem = function(elem, tagName) {
+        if (elem.nodeName === tagName.toUpperCase()) {
+            return elem;
+        }
+        if (elem.parentNode.nodeName === 'BODY') {
+            return null;
+        }
+        return elem.parentNode && closestElem(elem.parentNode, tagName);
+    };
+
+    window.addEventListener('load', function() {
+        // Add anchor tag for Show/Hide link
+        var fieldsets = document.querySelectorAll('fieldset.collapse');
+        for (var i = 0; i < fieldsets.length; i++) {
+            var elem = fieldsets[i];
+            // Don't hide if fields in this fieldset have errors
+            if (elem.querySelectorAll('div.errors').length === 0) {
+                elem.classList.add('collapsed');
+                var h2 = elem.querySelector('h2');
+                var link = document.createElement('a');
+                link.setAttribute('id', 'fieldsetcollapser' + i);
+                link.setAttribute('class', 'collapse-toggle');
+                link.setAttribute('href', '#');
+                link.textContent = gettext('Show');
+                h2.appendChild(document.createTextNode(' ('));
+                h2.appendChild(link);
+                h2.appendChild(document.createTextNode(')'));
+            }
+        }
+        // Add toggle to hide/show anchor tag
+        var toggleFunc = function(ev) {
+            if (ev.target.matches('.collapse-toggle')) {
+                ev.preventDefault();
+                ev.stopPropagation();
+                var fieldset = closestElem(ev.target, 'fieldset');
+                if (fieldset.classList.contains('collapsed')) {
+                    // Show
+                    ev.target.textContent = gettext('Hide');
+                    fieldset.classList.remove('collapsed');
+                } else {
+                    // Hide
+                    ev.target.textContent = gettext('Show');
+                    fieldset.classList.add('collapsed');
+                }
+            }
+        };
+        var inlineDivs = document.querySelectorAll('fieldset.module');
+        for (i = 0; i < inlineDivs.length; i++) {
+            inlineDivs[i].addEventListener('click', toggleFunc);
+        }
+    });
+})();