<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"><head><title>CSS Test (Conditional Rules): @supports rules OM support</title>
<link href="mailto:florian@rivoal.net" rel="author" title="Florian Rivoal" />
<link href="http://opera.com" rel="author" title="Opera Software ASA" />
<link href="http://www.w3.org/TR/css3-conditional/#at-supports" rel="help" />
<meta content="" name="flags" />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
@supports (padding: 0) {
dfn { width:0; }
@supports (width: 0) {
br { height:0; }
}
ol { display:none; }
}
@media all {
@supports (padding: 0) {
@keyframes foo {
0% { top: 0; left: 0; }
100% { top: 100px; left: 100px; }
}
}
}
@supports (border: black) and (padding: 0) and (width: 0) {
dfn { width:0; }
}
@supports (border: black) or (padding: 0) or (width: 0) {
dfn { width:0; }
}
</style>
<script>
/**
* Asserts tha the two strings are equal, after normalizing whitespace
*
* If the serialization of whitespace and identation ever becomes
* specified to a sufficient degree of presition, this should be
* replaced by a strict textual comparison with assert_equals.
*/
function assert_equals_normalized(a, b) {
var normal_a = a.replace(/\s+/g, " ");
var normal_b = b.replace(/\s+/g, " ");
assert_equals(normal_a, normal_b);
}
test(function(){
var base_rule = document.styleSheets[0].cssRules[0];
var child_rule = base_rule.cssRules[1];
assert_equals_normalized(base_rule.cssText,
"@supports (padding: 0) {\n"
+" dfn { width: 0px; }\n"
+" @supports (width: 0) {\n"
+" br { height: 0px; }\n"
+" }\n"
+" ol { display: none; }\n"
+"}");
assert_equals_normalized(child_rule.cssText,
"@supports (width: 0) {\n"
+" br { height: 0px; }\n"
+"}");
}, "nested @supports serialize properly");
test(function(){
var base_rule = document.styleSheets[0].cssRules[1];
var child_rule = base_rule.cssRules[0];
var grand_child_rule = child_rule.cssRules[0];
assert_equals_normalized(base_rule.cssText,
"@media all {\n"
+" @supports (padding: 0) {\n"
+" @keyframes foo {\n"
+" 0% { top: 0px; left: 0px; }\n"
+" 100% { top: 100px; left: 100px; }\n"
+" }\n"
+" }\n"
+"}");
assert_equals_normalized(child_rule.cssText,
"@supports (padding: 0) {\n"
+" @keyframes foo {\n"
+" 0% { top: 0px; left: 0px; }\n"
+" 100% { top: 100px; left: 100px; }\n"
+" }\n"
+"}");
assert_equals_normalized(grand_child_rule.cssText,
"@keyframes foo {\n"
+" 0% { top: 0px; left: 0px; }\n"
+" 100% { top: 100px; left: 100px; }\n"
+"}");
}, "@keyframes nested in @supports serialize properly");
test(function(){
var rules = document.styleSheets[0].cssRules;
assert_equals(rules.length, 4);
assert_equals(rules[0].type, CSSRule.SUPPORTS_RULE);
assert_equals(rules[1].type, CSSRule.MEDIA_RULE);
assert_equals(rules[0].cssRules.length, 3);
assert_equals(rules[0].cssRules[0].type, CSSRule.STYLE_RULE);
assert_equals(rules[0].cssRules[1].type, CSSRule.SUPPORTS_RULE);
assert_equals(rules[0].cssRules[2].type, CSSRule.STYLE_RULE);
assert_equals(rules[0].cssRules[1].cssRules.length, 1);
assert_equals(rules[0].cssRules[1].cssRules[0].type, CSSRule.STYLE_RULE);
assert_equals(rules[1].cssRules.length, 1);
assert_equals(rules[1].cssRules[0].type, CSSRule.SUPPORTS_RULE);
assert_equals(rules[1].cssRules[0].cssRules.length, 1);
assert_equals(rules[1].cssRules[0].cssRules[0].type, CSSRule.KEYFRAMES_RULE);
assert_equals(rules[2].cssRules.length, 1);
assert_equals(rules[2].cssRules[0].type, CSSRule.STYLE_RULE);
assert_equals(rules[3].cssRules.length, 1);
assert_equals(rules[3].cssRules[0].type, CSSRule.STYLE_RULE);
}, "The style sheet structure is properly represented");
test(function(){
document.styleSheets[0].deleteRule(1);
var rules = document.styleSheets[0].cssRules;
assert_equals(rules.length, 3);
assert_equals(rules[0].type, CSSRule.SUPPORTS_RULE);
assert_equals(rules[0].cssRules.length, 3);
assert_equals(rules[0].cssRules[0].type, CSSRule.STYLE_RULE);
assert_equals(rules[0].cssRules[1].type, CSSRule.SUPPORTS_RULE);
assert_equals(rules[0].cssRules[2].type, CSSRule.STYLE_RULE);
assert_equals(rules[0].cssRules[1].cssRules.length, 1);
assert_equals(rules[0].cssRules[1].cssRules[0].type, CSSRule.STYLE_RULE);
}, "Deleting the top level of a nested structue works");
test(function(){
var rules = document.styleSheets[0].cssRules;
rules[0].cssRules[1].insertRule("img { visibility:hidden; }", 0);
assert_equals(rules.length, 3);
assert_equals(rules[0].type, CSSRule.SUPPORTS_RULE);
assert_equals(rules[0].cssRules.length, 3);
assert_equals(rules[0].cssRules[0].type, CSSRule.STYLE_RULE);
assert_equals(rules[0].cssRules[1].type, CSSRule.SUPPORTS_RULE);
assert_equals(rules[0].cssRules[2].type, CSSRule.STYLE_RULE);
assert_equals(rules[0].cssRules[1].cssRules.length, 2);
assert_equals(rules[0].cssRules[1].cssRules[0].type, CSSRule.STYLE_RULE);
assert_equals(rules[0].cssRules[1].cssRules[0].cssText, "img { visibility: hidden; }");
assert_equals(rules[0].cssRules[1].cssRules[1].type, CSSRule.STYLE_RULE);
assert_equals(rules[0].cssRules[1].cssRules[1].cssText, "br { height: 0px; }");
}, "Rule insertion works in nested @supports rules");
test(function(){
var rules = document.styleSheets[0].cssRules;
rules[0].insertRule("@supports (left: 42px) { #foo { color:green; } }", 1);
assert_equals(rules.length, 3);
assert_equals(rules[0].type, CSSRule.SUPPORTS_RULE);
assert_equals(rules[0].cssRules.length, 4);
assert_equals(rules[0].cssRules[0].type, CSSRule.STYLE_RULE);
assert_equals(rules[0].cssRules[1].type, CSSRule.SUPPORTS_RULE);
assert_equals(rules[0].cssRules[2].type, CSSRule.SUPPORTS_RULE);
assert_equals(rules[0].cssRules[3].type, CSSRule.STYLE_RULE);
assert_equals(rules[0].cssRules[1].cssRules.length, 1);
assert_equals(rules[0].cssRules[1].cssRules[0].type, CSSRule.STYLE_RULE);
assert_equals(rules[0].cssRules[1].cssRules[0].cssText, "#foo { color: green; }");
assert_equals(rules[0].cssRules[2].cssRules.length, 2);
assert_equals(rules[0].cssRules[2].cssRules[0].type, CSSRule.STYLE_RULE);
assert_equals(rules[0].cssRules[2].cssRules[0].cssText, "img { visibility: hidden; }");
assert_equals(rules[0].cssRules[2].cssRules[1].type, CSSRule.STYLE_RULE);
assert_equals(rules[0].cssRules[2].cssRules[1].cssText, "br { height: 0px; }");
}, "Insertion @supports rules into another @supports rule works");
test(function(){
var rules = document.styleSheets[0].cssRules;
rules[0].deleteRule(2);
assert_equals(rules.length, 3);
assert_equals(rules[0].type, CSSRule.SUPPORTS_RULE);
assert_equals(rules[0].cssRules.length, 3);
assert_equals(rules[0].cssRules[0].type, CSSRule.STYLE_RULE);
assert_equals(rules[0].cssRules[1].type, CSSRule.SUPPORTS_RULE);
assert_equals(rules[0].cssRules[2].type, CSSRule.STYLE_RULE);
assert_equals(rules[0].cssRules[1].cssRules.length, 1);
assert_equals(rules[0].cssRules[1].cssRules[0].type, CSSRule.STYLE_RULE);
assert_equals(rules[0].cssRules[1].cssRules[0].cssText, "#foo { color: green; }");
}, "Deletion of a nested @supports rule works");
test(function(){
var rules = document.styleSheets[0].cssRules;
rules[0].insertRule("@font-face { font-familly: foo; src: url('http://www.example.com/foo'; }", 0);
assert_equals(rules.length, 3);
assert_equals(rules[0].type, CSSRule.SUPPORTS_RULE);
assert_equals(rules[0].cssRules.length, 4);
assert_equals(rules[0].cssRules[0].type, CSSRule.FONT_FACE_RULE);
}, "Inserting @font-face inside @supports works");
test(function(){
var style_rule = document.styleSheets[0].cssRules[0].cssRules[1];
assert_throws(new TypeError(), function() { style_rule.insertRule("@supports (width: 0) { ol { width: 0; } }", 0);} );
}, "Inserting an @supports inside a style rule should fail");
test(function(){
var rule = document.styleSheets[0].cssRules[1];
assert_equals_normalized(rule.cssText,
"@supports (border: black) and (padding: 0) and (width: 0) {\n"
+" dfn { width: 0px; }\n"
+"}");
}, "'and' arguments in @supports serialize in the correct order and with extra parentheses");
test(function(){
var rule = document.styleSheets[0].cssRules[2];
assert_equals_normalized(rule.cssText,
"@supports (border: black) or (padding: 0) or (width: 0) {\n"
+" dfn { width: 0px; }\n"
+"}");
}, "'or' arguments in @supports serialize in the correct order and with extra parentheses");
</script>
</head><body><div id="log"></div>
</body></html>