From 774be35cc29821e4cc3521b1c6e2b0d08e6c094d Mon Sep 17 00:00:00 2001
From: Zolmeister <zolikahan@gmail.com>
Date: Wed, 13 Aug 2014 12:59:03 -0700
Subject: [PATCH] added optional param to m.redraw() to allow forced update

---
 archive/v0.1.20/mithril-tests.js | 23 +++++++++++++++++++++--
 mithril.js                       |  4 ++--
 tests/mithril-tests.js           | 19 +++++++++++++++++++
 3 files changed, 42 insertions(+), 4 deletions(-)

diff --git a/archive/v0.1.20/mithril-tests.js b/archive/v0.1.20/mithril-tests.js
index 07324e42..0d6a257e 100644
--- a/archive/v0.1.20/mithril-tests.js
+++ b/archive/v0.1.20/mithril-tests.js
@@ -406,10 +406,10 @@ Mithril = m = new function app(window, undefined) {
 			m.endComputation()
 		}
 	}
-	m.redraw = function() {
+	m.redraw = function(force) {
 		var cancel = window.cancelAnimationFrame || window.clearTimeout
 		var defer = window.requestAnimationFrame || window.setTimeout
-		if (lastRedrawId) {
+		if (lastRedrawId && !force) {
 			cancel(lastRedrawId)
 			lastRedrawId = defer(redraw, 0)
 		}
@@ -1740,6 +1740,25 @@ function testMithril(mock) {
 		mock.requestAnimationFrame.$resolve() //teardown
 		return count === 3
 	})
+	test(function() {
+		mock.requestAnimationFrame.$resolve() //setup
+		var count = 0
+		var root = mock.document.createElement("div")
+		m.module(root, {
+			controller: function() {},
+			view: function(ctrl) {
+				count++
+			}
+		})
+		mock.requestAnimationFrame.$resolve() //teardown
+		m.redraw(true) //should run synchronously
+
+		m.redraw(true) //forced to run synchronously
+		m.redraw(true)
+		m.redraw(true)
+		mock.requestAnimationFrame.$resolve() //teardown
+		return count === 5
+	})
 
 	//m.route
 	test(function() {
diff --git a/mithril.js b/mithril.js
index e1a10c34..187febf0 100644
--- a/mithril.js
+++ b/mithril.js
@@ -406,10 +406,10 @@ Mithril = m = new function app(window, undefined) {
 			m.endComputation()
 		}
 	}
-	m.redraw = function() {
+	m.redraw = function(force) {
 		var cancel = window.cancelAnimationFrame || window.clearTimeout
 		var defer = window.requestAnimationFrame || window.setTimeout
-		if (lastRedrawId) {
+		if (lastRedrawId && !force) {
 			cancel(lastRedrawId)
 			lastRedrawId = defer(redraw, 0)
 		}
diff --git a/tests/mithril-tests.js b/tests/mithril-tests.js
index a009ee72..3de5fe91 100644
--- a/tests/mithril-tests.js
+++ b/tests/mithril-tests.js
@@ -743,6 +743,25 @@ function testMithril(mock) {
 		mock.requestAnimationFrame.$resolve() //teardown
 		return count === 3
 	})
+	test(function() {
+		mock.requestAnimationFrame.$resolve() //setup
+		var count = 0
+		var root = mock.document.createElement("div")
+		m.module(root, {
+			controller: function() {},
+			view: function(ctrl) {
+				count++
+			}
+		})
+		mock.requestAnimationFrame.$resolve() //teardown
+		m.redraw(true) //should run synchronously
+
+		m.redraw(true) //forced to run synchronously
+		m.redraw(true)
+		m.redraw(true)
+		mock.requestAnimationFrame.$resolve() //teardown
+		return count === 5
+	})
 
 	//m.route
 	test(function() {