1 files changed, 81 insertions, 0 deletions
diff --git a/media/admin_media/js/SelectFilter.js b/media/admin_media/js/SelectFilter.js
new file mode 100644
index 00000000..05019206
--- /dev/null
+++ b/media/admin_media/js/SelectFilter.js
@@ -0,0 +1,81 @@
+/*
+SelectFilter - Turns a multiple-select box into a filter interface.
+
+Requires SelectBox.js and addevent.js.
+*/
+
+function findForm(node) {
+    // returns the node of the form containing the given node
+    if (node.tagName.toLowerCase() != 'form') {
+        return findForm(node.parentNode);
+    }
+    return node;
+}
+
+var SelectFilter = {
+    init: function(field_id) {
+        var from_box = document.getElementById(field_id);
+        from_box.id += '_from'; // change its ID
+        // Create the INPUT input box
+        var input_box = document.createElement('input');
+        input_box.id = field_id + '_input';
+        input_box.setAttribute('type', 'text');
+        from_box.parentNode.insertBefore(input_box, from_box);
+        from_box.parentNode.insertBefore(document.createElement('br'), input_box.nextSibling);
+        // Create the TO box
+        var to_box = document.createElement('select');
+        to_box.id = field_id + '_to';
+        to_box.setAttribute('multiple', 'multiple');
+        to_box.setAttribute('size', from_box.size);
+        from_box.parentNode.insertBefore(to_box, from_box.nextSibling);
+        to_box.setAttribute('name', from_box.getAttribute('name'));
+        from_box.setAttribute('name', from_box.getAttribute('name') + '_old');
+        // Give the filters a CSS hook
+        from_box.setAttribute('class', 'filtered');
+        to_box.setAttribute('class', 'filtered');
+        // Set up the JavaScript event handlers for the select box filter interface
+        addEvent(input_box, 'keyup', function(e) { SelectFilter.filter_key_up(e, field_id); });
+        addEvent(input_box, 'keydown', function(e) { SelectFilter.filter_key_down(e, field_id); });
+        addEvent(from_box, 'dblclick', function() { SelectBox.move(field_id + '_from', field_id + '_to'); });
+        addEvent(from_box, 'focus', function() { input_box.focus(); });
+        addEvent(to_box, 'dblclick', function() { SelectBox.move(field_id + '_to', field_id + '_from'); });
+        addEvent(findForm(from_box), 'submit', function() { SelectBox.select_all(field_id + '_to'); });
+        SelectBox.init(field_id + '_from');
+        SelectBox.init(field_id + '_to');
+        // Move selected from_box options to to_box
+        SelectBox.move(field_id + '_from', field_id + '_to');
+    },
+    filter_key_up: function(event, field_id) {
+        from = document.getElementById(field_id + '_from');
+        // don't submit form if user pressed Enter
+        if ((event.which && event.which == 13) || (event.keyCode && event.keyCode == 13)) {
+            from.selectedIndex = 0;
+            SelectBox.move(field_id + '_from', field_id + '_to');
+            from.selectedIndex = 0;
+            return false;
+        }
+        var temp = from.selectedIndex;
+        SelectBox.filter(field_id + '_from', document.getElementById(field_id + '_input').value);
+        from.selectedIndex = temp;
+        return true;
+    },
+    filter_key_down: function(event, field_id) {
+        from = document.getElementById(field_id + '_from');
+        // right arrow -- move across
+        if ((event.which && event.which == 39) || (event.keyCode && event.keyCode == 39)) {
+            var old_index = from.selectedIndex;
+            SelectBox.move(field_id + '_from', field_id + '_to');
+            from.selectedIndex = (old_index == from.length) ? from.length - 1 : old_index;
+            return false;
+        }
+        // down arrow -- wrap around
+        if ((event.which && event.which == 40) || (event.keyCode && event.keyCode == 40)) {
+            from.selectedIndex = (from.length == from.selectedIndex + 1) ? 0 : from.selectedIndex + 1;
+        }
+        // up arrow -- wrap around
+        if ((event.which && event.which == 38) || (event.keyCode && event.keyCode == 38)) {
+            from.selectedIndex = (from.selectedIndex == 0) ? from.length - 1 : from.selectedIndex - 1;
+        }
+        return true;
+    }
+}