refactor redraw

README.md

@@ -47,7 +47,7 @@ app.controller = function() {
 	this.pages = app.PageList();
 	
 	this.rotate = function() {
-		this.pages.push(this.pages.shift())
+		this.pages().push(this.pages().shift())
 	}.bind(this)
 };
 

docs/getting-started.md

@@ -376,6 +376,8 @@ m.module(document, todo);
 
 Mithril's auto-redrawing system keeps track of controller stability, and only redraws the view once it detects that the controller has finished running all of its code, including asynchronous AJAX payloads.
 
+Also note that this mechanism itself is not asynchronous if it doesn't need to be: Mithril does not need to wait for the next browser repaint frame to redraw - it doesn't even need to wait for the document ready event on the first redraw - it will redraw immediately upon script completion, if able to.
+
 ---
 
 ### Summary

docs/layout/index.html

@@ -89,7 +89,7 @@ app.controller = function() {
 	this.pages = app.PageList();
 	
 	this.rotate = function() {
-		this.pages.push(this.pages.shift())
+		this.pages().push(this.pages().shift())
 	}.bind(this)
 };
 

mithril.js

@@ -284,7 +284,10 @@ Mithril = m = new function app(window) {
 			e = e || event
 			m.startComputation()
 			try {return callback.call(object, e)}
-			finally {m.endComputation()}
+			finally {
+				if (!lastRedrawId) lastRedrawId = -1;
+				m.endComputation()
+			}
 		}
 	}
 
@@ -351,8 +354,14 @@ Mithril = m = new function app(window) {
 	m.redraw = function() {
 		var cancel = window.cancelAnimationFrame || window.clearTimeout
 		var defer = window.requestAnimationFrame || window.setTimeout
-		cancel(lastRedrawId)
-		lastRedrawId = defer(redraw, 0)
+		if (lastRedrawId) {
+			cancel(lastRedrawId)
+			lastRedrawId = defer(redraw, 0)
+		}
+		else {
+			redraw()
+			lastRedrawId = defer(function() {lastRedrawId = null}, 0)
+		}
 	}
 	function redraw() {
 		for (var i = 0; i < roots.length; i++) {
@@ -362,6 +371,7 @@ Mithril = m = new function app(window) {
 			computePostRedrawHook()
 			computePostRedrawHook = null
 		}
+		lastRedrawId = null
 	}
 
 	var pendingRequests = 0

tests/mithril-tests.js

@@ -714,12 +714,13 @@ function testMithril(mock) {
 			}
 		})
 		mock.requestAnimationFrame.$resolve() //teardown
-		m.redraw()
-		m.redraw()
+		m.redraw() //should run synchronously
+		
+		m.redraw() //rest should run asynchronously since they're spamming
 		m.redraw()
 		m.redraw()
 		mock.requestAnimationFrame.$resolve() //teardown
-		return count === 2
+		return count === 3
 	})
 
 	//m.route

tests/mock.js

@@ -72,7 +72,11 @@ mock.window = new function() {
 	}
 	window.scrollTo = function() {}
 	window.cancelAnimationFrame = function() {}
-	window.requestAnimationFrame = function(callback) {window.requestAnimationFrame.$callback = callback}
+	window.requestAnimationFrame = function(callback) {
+		window.requestAnimationFrame.$callback = callback
+		return window.requestAnimationFrame.$id++
+	}
+	window.requestAnimationFrame.$id = 1
 	window.requestAnimationFrame.$resolve = function() {
 		if (window.requestAnimationFrame.$callback) window.requestAnimationFrame.$callback()
 		window.requestAnimationFrame.$callback = null