зеркало из https://github.com/mozilla/gecko-dev.git
88 строки
3.1 KiB
HTML
88 строки
3.1 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<head>
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<title>Test for correct handling of aStartStruct parameter to nsRuleNode::Compute*Data</title>
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<script src="/tests/SimpleTest/SimpleTest.js"></script>
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<script type="text/javascript" src="property_database.js"></script>
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<style type="text/css" id="stylesheet"></style>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
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</head>
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<body>
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<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=216456">Mozilla Bug 216456</a>
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<p id="display">
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<span id="base"></span>
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<span id="test"></span>
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</p>
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<div id="content" style="display: none">
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</div>
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<pre id="test">
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<script class="testbody" type="text/javascript">
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/**
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* The purpose of this test was to test that in the old style system
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* the nsRuleNode::Compute*Data functions were written correctly.
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* In particular, in these functions, when the specified value of a
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* property had unit eCSSUnit_Null, touching the computed data is
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* forbidden. This is because we sometimes would stop walking up the
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* rule tree when we find computed data for an initial subsequence of
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* our rules (i.e., an ancestor rule node) that we can use as a starting
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* point (aStartStruct) for the computation for the current rule node.
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*
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* However, we don't cache style structs in the rule tree in the current
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* style system code, and property cascading no longer relies on hand
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* written functions, so this particular failure mode isn't as likely to
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* happen.
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*/
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var gStyleSheet = document.getElementById("stylesheet").sheet;
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var gRule1 = gStyleSheet.cssRules[gStyleSheet.insertRule("#base, #test {}", gStyleSheet.cssRules.length)];
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var gRule2 = gStyleSheet.cssRules[gStyleSheet.insertRule("#test {}", gStyleSheet.cssRules.length)];
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var gBase = getComputedStyle(document.getElementById("base"), "");
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var gTest = getComputedStyle(document.getElementById("test"), "");
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function test_property(prop, lower_set, higher_set) {
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var info = gCSSProperties[prop];
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if (info.subproperties || info.logical)
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return;
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gRule1.style.setProperty(prop, info[lower_set][0]);
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gRule2.style.setProperty(prop, info[higher_set][0]);
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if ("prerequisites" in info) {
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for (var prereq in info.prerequisites) {
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gRule2.style.setProperty(prereq, info.prerequisites[prereq], "");
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}
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}
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gBase.getPropertyValue(prop);
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var higher_set_val = gTest.getPropertyValue(prop);
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gRule2.style.setProperty(prop, info[lower_set][0], "");
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var lower_set_val = gTest.getPropertyValue(prop);
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isnot(higher_set_val, lower_set_val, "initial and other values of " + prop + " are different");
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gRule2.style.removeProperty(prop);
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is(gTest.getPropertyValue(prop), lower_set_val, prop + " is not touched when its value comes from aStartStruct");
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gRule1.style.removeProperty(prop);
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if ("prerequisites" in info) {
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for (var prereq in info.prerequisites) {
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gRule2.style.removeProperty(prereq);
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}
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}
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}
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function round(lower_set, higher_set) {
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for (var prop in gCSSProperties)
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test_property(prop, lower_set, higher_set);
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}
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round("other_values", "initial_values");
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round("initial_values", "other_values");
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</script>
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</pre>
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</body>
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</html>
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