diff --git a/webclient/room/room-directive.js b/webclient/room/room-directive.js
new file mode 100644
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+++ b/webclient/room/room-directive.js
@@ -0,0 +1,134 @@
+/*
+ Copyright 2014 matrix.org
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+'use strict';
+
+angular.module('RoomController')
+.directive('autoComplete', ['$timeout', function ($timeout) {
+ return function (scope, element, attrs) {
+ element.bind("keydown keypress", function (event) {
+ // console.log("event: " + event.which);
+ if (event.which === 9) {
+ if (!scope.autoCompleting) { // cache our starting text
+ // console.log("caching " + element[0].value);
+ scope.autoCompleteOriginal = element[0].value;
+ scope.autoCompleting = true;
+ }
+
+ if (event.shiftKey) {
+ scope.autoCompleteIndex--;
+ if (scope.autoCompleteIndex < 0) {
+ scope.autoCompleteIndex = 0;
+ }
+ }
+ else {
+ scope.autoCompleteIndex++;
+ }
+
+ var searchIndex = 0;
+ var targetIndex = scope.autoCompleteIndex;
+ var text = scope.autoCompleteOriginal;
+
+ // console.log("targetIndex: " + targetIndex + ", text=" + text);
+
+ // FIXME: use the correct regexp to recognise userIDs
+ var search = /@?([a-zA-Z0-9_\-:\.]+)$/.exec(text);
+ if (targetIndex === 0) {
+ element[0].value = text;
+ }
+ else if (search && search[1]) {
+ // console.log("search found: " + search);
+ var expansion;
+
+ // FIXME: could do better than linear search here
+ angular.forEach(scope.members, function(item, name) {
+ if (item.displayname && searchIndex < targetIndex) {
+ if (item.displayname.toLowerCase().indexOf(search[1].toLowerCase()) === 0) {
+ expansion = item.displayname;
+ searchIndex++;
+ }
+ }
+ });
+ if (searchIndex < targetIndex) { // then search raw mxids
+ angular.forEach(scope.members, function(item, name) {
+ if (searchIndex < targetIndex) {
+ if (name.toLowerCase().indexOf(search[1].toLowerCase()) === 1) {
+ expansion = name;
+ searchIndex++;
+ }
+ }
+ });
+ }
+
+ if (searchIndex === targetIndex) {
+ // xchat-style tab complete
+ if (search[0].length === text.length)
+ expansion += " : ";
+ else
+ expansion += " ";
+ element[0].value = text.replace(/@?([a-zA-Z0-9_\-:\.]+)$/, expansion);
+ // cancel blink
+ element[0].className = "";
+ }
+ else {
+ // console.log("wrapped!");
+ element[0].className = "blink"; // XXX: slightly naughty to bypass angular
+ $timeout(function() {
+ element[0].className = "";
+ }, 150);
+ element[0].value = text;
+ scope.autoCompleteIndex = 0;
+ }
+ }
+ else {
+ scope.autoCompleteIndex = 0;
+ }
+ event.preventDefault();
+ }
+ else if (event.which !== 16 && scope.autoCompleting) {
+ scope.autoCompleting = false;
+ scope.autoCompleteIndex = 0;
+ }
+ });
+ };
+}])
+
+// A directive to anchor the scroller position at the bottom when the browser is resizing.
+// When the screen resizes, the bottom of the element remains the same, not the top.
+.directive('keepScroll', ['$window', function($window) {
+ return {
+ link: function(scope, elem, attrs) {
+
+ scope.windowHeight = $window.innerHeight;
+
+ // Listen to window size change
+ angular.element($window).bind('resize', function() {
+
+ // If the scroller is scrolled to the bottom, there is nothing to do.
+ // The browser will move it as expected
+ if (elem.scrollTop() + elem.height() !== elem[0].scrollHeight) {
+ // Else, move the scroller position according to the window height change delta
+ var windowHeightDelta = $window.innerHeight - scope.windowHeight;
+ elem.scrollTop(elem.scrollTop() - windowHeightDelta);
+ }
+
+ // Store the new window height for the next screen size change
+ scope.windowHeight = $window.innerHeight;
+ });
+ }
+ };
+}]);
+
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