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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
| commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
| tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /layout/style/test/test_rules_out_of_sheets.html | |
| parent | Initial commit. (diff) | |
| download | thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip | |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'layout/style/test/test_rules_out_of_sheets.html')
| -rw-r--r-- | layout/style/test/test_rules_out_of_sheets.html | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/layout/style/test/test_rules_out_of_sheets.html b/layout/style/test/test_rules_out_of_sheets.html new file mode 100644 index 0000000000..2ca53d31b7 --- /dev/null +++ b/layout/style/test/test_rules_out_of_sheets.html @@ -0,0 +1,115 @@ +<!DOCTYPE HTML> +<html> +<!-- +https://bugzilla.mozilla.org/show_bug.cgi?id=634373 +--> +<head> + <title>Test for Bug 634373</title> + <script src="/tests/SimpleTest/SimpleTest.js"></script> + <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/> +</head> +<body> +<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=634373">Mozilla Bug 634373</a> +<p id="display"></p> +<div id="content" style="display: none"> + +</div> +<pre id="test"> +<script type="application/javascript"> + +/** Test for Bug 634373 **/ + +function make_rule_and_remove_sheet(text, getter) { + var style = document.createElement("style"); + style.setAttribute("type", "text/css"); + style.appendChild(document.createTextNode(text)); + document.head.appendChild(style); + var result = style.sheet.cssRules[0]; + if (getter) { + result = getter(result); + } + document.head.removeChild(style); + style = null; + SpecialPowers.DOMWindowUtils.garbageCollect(); + return result; +} + +var gDisplayCS = getComputedStyle(document.getElementById("display"), ""); + +function keep_rule_alive_by_matching(rule) { + // It's the caller's job to guarantee that the rule matches a p. + // This just causes a style flush, which in turn keeps the rule alive + // until the next style flush. + var color = gDisplayCS.color; + return rule; +} + +function get_rule_and_child(rule) { + return [rule, rule.cssRules[0]]; +} + +function get_only_child(rule) { + return rule.cssRules[0]; +} + +var rule; + +// In this case, the rule goes away immediately, so we're testing +// the DOM wrapper's handling of a null rule, rather than the rule's +// handling of a null sheet. +rule = make_rule_and_remove_sheet("p { color: blue }"); +rule.style.color = ""; +try { + rule.style.color = "fuchsia"; +} catch(ex) {} + +rule = make_rule_and_remove_sheet("p { color: blue }", + keep_rule_alive_by_matching); +try { + rule.style.color = ""; +} catch(ex) {} +try { + rule.style.color = "fuchsia"; +} catch(ex) {} + +rule = make_rule_and_remove_sheet("@media screen { p { color: blue } }", + get_rule_and_child); +rule[1].style.color = ""; +try { + rule[1].style.color = "fuchsia"; +} catch(ex) {} + +// In this case, the rule goes away immediately, so we're testing +// the DOM wrapper's handling of a null rule, rather than the rule's +// handling of a null sheet. +rule = make_rule_and_remove_sheet("@media screen { p { color: blue } }", + get_only_child); +rule.style.color = ""; +try { + rule.style.color = "fuchsia"; +} catch(ex) {} + +rule = make_rule_and_remove_sheet("@media screen { p { color: blue } }", + function(ruleInner) { + return keep_rule_alive_by_matching( + get_only_child(ruleInner)); + }); +try { + rule.style.color = ""; +} catch(ex) {} +try { + rule.style.color = "fuchsia"; +} catch(ex) {} + +rule = make_rule_and_remove_sheet("@keyframes a { from { color: blue } }"); +rule.appendRule("from { color: fuchsia}"); +rule.deleteRule("from"); +rule.name = "b"; +rule.cssRules[0].keyText = "50%"; + +ok(true, "didn't crash"); + +</script> +</pre> +</body> +</html> |