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Diffstat (limited to 'layout/style/test/test_compute_data_with_start_struct.html')
-rw-r--r-- | layout/style/test/test_compute_data_with_start_struct.html | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/layout/style/test/test_compute_data_with_start_struct.html b/layout/style/test/test_compute_data_with_start_struct.html new file mode 100644 index 0000000000..6970270c95 --- /dev/null +++ b/layout/style/test/test_compute_data_with_start_struct.html @@ -0,0 +1,87 @@ +<!DOCTYPE HTML> +<html> +<head> + <title>Test for correct handling of aStartStruct parameter to nsRuleNode::Compute*Data</title> + <script src="/tests/SimpleTest/SimpleTest.js"></script> + <script type="text/javascript" src="property_database.js"></script> + <style type="text/css" id="stylesheet"></style> + <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=216456">Mozilla Bug 216456</a> +<p id="display"> + <span id="base"></span> + <span id="test"></span> +</p> +<div id="content" style="display: none"> + +</div> +<pre id="test"> +<script class="testbody" type="text/javascript"> + +/** + * The purpose of this test was to test that in the old style system + * the nsRuleNode::Compute*Data functions were written correctly. + * In particular, in these functions, when the specified value of a + * property had unit eCSSUnit_Null, touching the computed data is + * forbidden. This is because we sometimes would stop walking up the + * rule tree when we find computed data for an initial subsequence of + * our rules (i.e., an ancestor rule node) that we can use as a starting + * point (aStartStruct) for the computation for the current rule node. + * + * However, we don't cache style structs in the rule tree in the current + * style system code, and property cascading no longer relies on hand + * written functions, so this particular failure mode isn't as likely to + * happen. + */ + +var gStyleSheet = document.getElementById("stylesheet").sheet; +var gRule1 = gStyleSheet.cssRules[gStyleSheet.insertRule("#base, #test {}", gStyleSheet.cssRules.length)]; +var gRule2 = gStyleSheet.cssRules[gStyleSheet.insertRule("#test {}", gStyleSheet.cssRules.length)]; + +var gBase = getComputedStyle(document.getElementById("base"), ""); +var gTest = getComputedStyle(document.getElementById("test"), ""); + +function test_property(prop, lower_set, higher_set) { + var info = gCSSProperties[prop]; + if (info.subproperties || info.logical) + return; + + gRule1.style.setProperty(prop, info[lower_set][0]); + gRule2.style.setProperty(prop, info[higher_set][0]); + + if ("prerequisites" in info) { + for (var prereq in info.prerequisites) { + gRule2.style.setProperty(prereq, info.prerequisites[prereq], ""); + } + } + + gBase.getPropertyValue(prop); + var higher_set_val = gTest.getPropertyValue(prop); + gRule2.style.setProperty(prop, info[lower_set][0], ""); + var lower_set_val = gTest.getPropertyValue(prop); + isnot(higher_set_val, lower_set_val, "initial and other values of " + prop + " are different"); + + gRule2.style.removeProperty(prop); + is(gTest.getPropertyValue(prop), lower_set_val, prop + " is not touched when its value comes from aStartStruct"); + + gRule1.style.removeProperty(prop); + if ("prerequisites" in info) { + for (var prereq in info.prerequisites) { + gRule2.style.removeProperty(prereq); + } + } +} + +function round(lower_set, higher_set) { + for (var prop in gCSSProperties) + test_property(prop, lower_set, higher_set); +} + +round("other_values", "initial_values"); +round("initial_values", "other_values"); + +</script> +</pre> +</body> +</html> |