From df45c53982db8b9d2b1955a5ca3aa401d6a48d47 Mon Sep 17 00:00:00 2001
From: "florian.benz" <florianbenz1@gmail.com>
Date: Thu, 23 Jan 2014 13:07:22 +0100
Subject: [PATCH] feat(jqLite): IE7 support for adding/removing CSS classes

With this change most of Angular's features work again in IE7. As IE7 and below are not tested,
there is no gurantee what works and what not.

See #4562, #4880
---
 src/jqLite.js | 56 ++++++++++++++++++++++++++++++++++-----------------
 1 file changed, 37 insertions(+), 19 deletions(-)

diff --git a/src/jqLite.js b/src/jqLite.js
index e59805147886..4cdce1397657 100644
--- a/src/jqLite.js
+++ b/src/jqLite.js
@@ -299,30 +299,48 @@ function jqLiteHasClass(element, selector) {
 }
 
 function jqLiteRemoveClass(element, cssClasses) {
-  if (cssClasses && element.setAttribute) {
-    forEach(cssClasses.split(' '), function(cssClass) {
-      element.setAttribute('class', trim(
-          (" " + (element.getAttribute('class') || '') + " ")
-          .replace(/[\n\t]/g, " ")
-          .replace(" " + trim(cssClass) + " ", " "))
-      );
-    });
+  if (cssClasses) {
+    if (msie && msie < 8) {
+      forEach(cssClasses.split(' '), function(cssClass) {
+        element.className = trim(
+            (" " + element.className + " ")
+            .replace(/[\n\t]/g, " ")
+            .replace(" " + trim(cssClass) + " ", " ")
+        );
+      });
+    } else {
+      forEach(cssClasses.split(' '), function(cssClass) {
+        element.setAttribute('class', trim(
+            (" " + (element.getAttribute('class') || '') + " ")
+            .replace(/[\n\t]/g, " ")
+            .replace(" " + trim(cssClass) + " ", " "))
+        );
+      });
+    }
   }
 }
 
 function jqLiteAddClass(element, cssClasses) {
-  if (cssClasses && element.setAttribute) {
-    var existingClasses = (' ' + (element.getAttribute('class') || '') + ' ')
-                            .replace(/[\n\t]/g, " ");
-
-    forEach(cssClasses.split(' '), function(cssClass) {
-      cssClass = trim(cssClass);
-      if (existingClasses.indexOf(' ' + cssClass + ' ') === -1) {
-        existingClasses += cssClass + ' ';
-      }
-    });
+  if (cssClasses) {
+    if (msie && msie < 8) {
+      forEach(cssClasses.split(' '), function(cssClass) {
+        if (!jqLiteHasClass(element, cssClass)) {
+          element.className = trim(element.className + ' ' + trim(cssClass));
+        }
+      });
+    } else {
+      var existingClasses = (' ' + (element.getAttribute('class') || '') + ' ')
+                              .replace(/[\n\t]/g, " ");
 
-    element.setAttribute('class', trim(existingClasses));
+      forEach(cssClasses.split(' '), function(cssClass) {
+        cssClass = trim(cssClass);
+        if (existingClasses.indexOf(' ' + cssClass + ' ') === -1) {
+          existingClasses += cssClass + ' ';
+        }
+      });
+
+      element.setAttribute('class', trim(existingClasses));
+    }
   }
 }