un-anchored :hover issue

non-link-hover

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+/*
+ * Rule: When using a vendor-prefixed gradient, make sure to use them all.
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+     //rule information
+    id: "non-link-hover",
+    name: "Non-Link Hover",
+    desc: "Using :hover pseudo-selector to non-link elements is known to be slow.",
+    browsers: "IE",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this;
+
+
+        parser.addListener("startrule", function(event){
+            var selectors = event.selectors,
+                selector,
+                part,
+                modifier,
+                i, j, k;
+
+            for (i=0; i < selectors.length; i++){
+                selector = selectors[i];
+
+                part = selector.parts[selector.parts.length-1];
+
+				if (part.modifiers.length-1 !== -1){
+				if (part.modifiers[part.modifiers.length-1].text === ":hover" && (part.elementName == null || part.elementName != "a")){
+                    reporter.warn(rule.desc, part.line, part.col, rule);
+                }
+				}
+
+            }
+        });
+    }
+
+});

src/rules/non-link-hover

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+/*
+ * Rule: When using a vendor-prefixed gradient, make sure to use them all.
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+     //rule information
+    id: "non-link-hover",
+    name: "Non-Link Hover",
+    desc: "Using :hover pseudo-selector to non-link elements is known to be slow.",
+    browsers: "IE",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this;
+
+
+        parser.addListener("startrule", function(event){
+            var selectors = event.selectors,
+                selector,
+                part,
+                modifier,
+                i, j, k;
+
+            for (i=0; i < selectors.length; i++){
+                selector = selectors[i];
+
+                part = selector.parts[selector.parts.length-1];
+
+				if (part.modifiers.length-1 !== -1){
+				if (part.modifiers[part.modifiers.length-1].text === ":hover" && (part.elementName == null || part.elementName != "a")){
+                    reporter.warn(rule.desc, part.line, part.col, rule);
+                }
+				}
+
+            }
+        });
+    }
+
+});

tests/rules/non-link-hover

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+(function(){
+
+    /*global YUITest, CSSLint*/
+    var Assert = YUITest.Assert;
+
+    YUITest.TestRunner.add(new YUITest.TestCase({
+        name: ":hover; Warning",
+        "using :hover on non-link ements should result in an warning": function(){
+            var result = CSSLint.verify("li:hover {color:blue;} .foo:hover {float:left;} #foo:hover {clear:both;} div.faa :hover {font-size:1px;}", { "non-link-hover": 4 });
+            Assert.areEqual(4, result.messages.length);
+            Assert.areEqual("warn", result.messages[0].type);
+            Assert.areEqual("Using :hover pseudo-selector to non-link elements is known to be slow.", result.messages[0].message);
+        },
+        "using :hover on link ements should not result in any remark": function(){
+            var result = CSSLint.verify("a:hover {color:red;} li a:hover, div a:hover {color:red;}", { "non-link-hover": 0 });
+            Assert.areEqual(0, result.messages.length);
+        }
+    }));
+})();