Merge pull request #119 from pistolero/config_context

Added context for config handlers

mithril.js

@@ -96,7 +96,7 @@ Mithril = m = new function app(window) {
 				cached.nodes.intact = true
 				if (shouldReattach === true) parentElement.insertBefore(node, parentElement.childNodes[index] || null)
 			}
-			if (type.call(data.attrs["config"]) == "[object Function]") data.attrs["config"](node, !isNew)
+			if (type.call(data.attrs["config"]) == "[object Function]") data.attrs["config"](node, !isNew, cached.config_context=cached.config_context || {})
 		}
 		else {
 			var node

tests/e2e/tests.js

@@ -45,3 +45,20 @@ test('issue99 regression', function() {
 	m.render(dummyEl, view2);
 	equal(dummyEl.innerHTML, '<div><span>0</span></div>', 'view2 should be rendered correctly');
 });
+
+
+test('config handler context', function() {
+	expect(3);
+	var view = m('div', {config: function(evt, isInitialized, context){
+		equal(context instanceof Object, true);
+		context.data = 1;
+	}})
+	m.render(dummyEl, view);
+
+	var view = m('div', {config: function(evt, isInitialized, context){
+		equal(context instanceof Object, true);
+		equal(context.data, 1);
+	}})
+	m.render(dummyEl, view);
+
+})

tests/mithril-tests.js

@@ -998,9 +998,39 @@ function testMithril(mock) {
 	test(function() {
 		return m.deps.factory.toString().indexOf("console") < 0
 	})
+
+	// config context
+	test(function() {
+		var root = mock.document.createElement("div")
+
+		var success = false;
+		m.render(root, m("div", {config: function(elem, isInitialized, ctx) {ctx.data=1}}));
+		m.render(root, m("div", {config: function(elem, isInitialized, ctx) {success = ctx.data===1}}));
+		return success;
+	})
+
+	// more complex config context
+	test(function() {
+		var root = mock.document.createElement("div")
+
+		var idx = 0;
+		var success = true;
+		var statefulConfig = function(elem, isInitialized, ctx) {ctx.data=idx++}
+		var node = m("div", {config: statefulConfig});
+		m.render(root, [node, node]);
+
+		idx = 0;
+		var checkConfig = function(elem, isInitialized, ctx) {
+			success = success && (ctx.data === idx++)
+		}
+		node = m("div", {config: checkConfig});
+		m.render(root, [node, node]);
+		return success;
+	})
+
 }
 
 //mocks
 testMithril(mock.window)
 
-test.print(console.log)
+test.print(console.log)