Add touch slideout menu for mobile

client/css/style.css

@@ -184,13 +184,22 @@ button,
 
 #viewport {
 	height: 100%;
-	transition: all .4s;
+	transition: all .2s;
 	-webkit-transform: translateZ(0);
 	transform: translateZ(0);
 	-webkit-perspective: 1000;
 	perspective: 1000;
 }
 
+#viewport.menu-open {
+	-webkit-transform: translate3d(220px, 0, 0);
+	transform: translate3d(220px, 0, 0);
+}
+
+#viewport.menu-dragging {
+	transition: none !important;
+}
+
 #viewport .lt,
 #viewport .rt,
 #chat button.menu {
@@ -1618,11 +1627,6 @@ button,
 		margin-top: 60px !important;
 	}
 
-	#viewport.lt {
-		-webkit-transform: translate3d(220px, 0, 0);
-		transform: translate3d(220px, 0, 0);
-	}
-
 	#viewport.rt #chat .sidebar {
 		-webkit-transform: translate3d(-180px, 0, 0);
 		transform: translate3d(-180px, 0, 0);
@@ -1668,6 +1672,13 @@ button,
 	}
 }
 
+@media (min-width: 769px) {
+	#viewport {
+		-webkit-transform: none !important;
+		transform: none !important;
+	}
+}
+
 @media (max-width: 479px) {
 	.container {
 		margin: 40px 0 !important;

client/js/libs/slideout.js

@@ -0,0 +1,85 @@
+/**
+ * Simple slideout menu implementation.
+ */
+function slideoutMenu(viewport, menu) {
+	var touchStartPos = null;
+	var touchCurPos = null;
+	var touchStartTime = 0;
+	var menuWidth = parseFloat(window.getComputedStyle(menu).width);
+	var menuIsOpen = false;
+
+	function toggleMenu(state) {
+		menuIsOpen = state;
+		viewport.classList.toggle("menu-open", state);
+	}
+
+	function disableSlideout() {
+		viewport.removeEventListener("ontouchstart", onTouchStart);
+	}
+
+	function onTouchStart(e) {
+		if (e.touches.length !== 1) {
+			onTouchEnd(null);
+			return false;
+		}
+
+		var touch = e.touches.item(0);
+		viewport.classList.toggle("menu-dragging", true);
+
+		if ((!menuIsOpen && touch.screenX < 50) || (menuIsOpen && touch.screenX > menuWidth)) {
+			touchStartPos = touch;
+			touchCurPos = touch;
+			touchStartTime = Date.now();
+
+			viewport.addEventListener("touchmove", onTouchMove);
+			viewport.addEventListener("touchend", onTouchEnd);
+		}
+	}
+
+	function onTouchMove(e) {
+		var touch = touchCurPos = e.touches.item(0);
+		var setX = touch.screenX - touchStartPos.screenX;
+
+		if (menuIsOpen) {
+			setX += menuWidth;
+		}
+
+		if (setX > menuWidth) {
+			setX = menuWidth;
+		} else if (setX < 0) {
+			setX = 0;
+		}
+
+		viewport.style.transform = "translate3d(" + setX + "px, 0, 0)";
+		e.preventDefault();
+		e.stopPropagation();
+	}
+
+	function onTouchEnd() {
+		var diff = touchCurPos.screenX - touchStartPos.screenX;
+		var absDiff = Math.abs(diff);
+
+		if (absDiff > menuWidth / 2 || Date.now() - touchStartTime < 180 && absDiff > 50) {
+			toggleMenu(diff > 0);
+		}
+
+		viewport.removeEventListener("touchmove", onTouchMove);
+		viewport.removeEventListener("touchend", onTouchEnd);
+		viewport.classList.toggle("menu-dragging", false);
+		viewport.style.transform = null;
+
+		touchStartPos = null;
+		touchCurPos = null;
+		touchStartTime = 0;
+	}
+
+	viewport.addEventListener("touchstart", onTouchStart);
+
+	return {
+		disable: disableSlideout,
+		toggle: toggleMenu,
+		isOpen: function() {
+			return menuIsOpen;
+		}
+	};
+}

client/js/lounge.js

@@ -510,18 +510,22 @@ $(function() {
 	});
 
 	var viewport = $("#viewport");
+	var sidebarSlide = slideoutMenu(viewport[0], sidebar[0]); // eslint-disable-line
 	var contextMenuContainer = $("#context-menu-container");
 	var contextMenu = $("#context-menu");
 
-	viewport.on("click", ".lt, .rt", function(e) {
+	chat.on("click", function(e) {
+		if ($(e.target).is(".lt")) {
+			sidebarSlide.toggle(!sidebarSlide.isOpen());
+		} else if (sidebarSlide.isOpen()) {
+			sidebarSlide.toggle(false);
+		}
+	});
+
+	viewport.on("click", ".rt", function(e) {
 		var self = $(this);
 		viewport.toggleClass(self.attr("class"));
-		if (viewport.is(".lt, .rt")) {
-			e.stopPropagation();
-			chat.find(".chat").one("click", function() {
-				viewport.removeClass("lt");
-			});
-		}
+		e.stopPropagation();
 	});
 
 	function positionContextMenu(that, e) {
@@ -688,7 +692,7 @@ $(function() {
 			toggleFaviconNotification(false);
 		}
 
-		viewport.removeClass("lt");
+		sidebarSlide.toggle(false);
 		$("#windows .active")
 			.removeClass("active")
 			.find(".chat")