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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo
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Roy Tam
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layout/style/test/test_initial_computation.html
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163
layout/style/test/test_initial_computation.html
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<!DOCTYPE HTML>
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<html>
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<!--
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-->
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<head>
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<title>Test for computation of CSS 'initial' on all properties and 'unset' on reset properties</title>
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<script type="text/javascript" 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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<style type="text/css">
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/* For 'width', 'height', etc., need a constant size container. */
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#display { width: 500px; height: 200px }
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</style>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
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<script type="text/javascript">
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SimpleTest.waitForExplicitFinish();
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var load_count = 0;
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function load_done() {
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if (++load_count == 3)
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run_tests();
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}
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</script>
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</head>
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<body>
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<p id="display"><span><span id="elementf"></span></span>
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<iframe id="unstyledn" src="unstyled.xml" height="10" width="10" onload="load_done()"></iframe>
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<iframe id="unstyledf" src="unstyled-frame.xml" height="10" width="10" onload="load_done()"></iframe>
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</p>
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<div id="content" style="display: none">
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<div><span id="elementn"></span></div>
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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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/** Test for computation of CSS 'initial' on all properties and 'unset' on
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reset properties **/
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var gBrokenInitial = {
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};
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function xfail_initial(property) {
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return property in gBrokenInitial;
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}
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var gElementN = document.getElementById("elementn");
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var gElementF = document.getElementById("elementf");
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var gStyleSheet = document.getElementById("stylesheet").sheet;
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var gRule1 = gStyleSheet.cssRules[gStyleSheet.insertRule("#elementn, #elementf {}", gStyleSheet.cssRules.length)];
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var gRule2 = gStyleSheet.cssRules[gStyleSheet.insertRule("#elementn, #elementf {}", gStyleSheet.cssRules.length)];
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var gInitialValuesN;
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var gInitialValuesF;
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var gInitialPrereqsRuleN;
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var gInitialPrereqsRuleF;
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var gTestUnset = SpecialPowers.getBoolPref("layout.css.unset-value.enabled");
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function setup_initial_values(id, ivalprop, prereqprop) {
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var iframe = document.getElementById(id);
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window[ivalprop] = iframe.contentWindow.getComputedStyle(
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iframe.contentDocument.documentElement.firstChild, "");
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var sheet = iframe.contentDocument.styleSheets[0];
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// For 'width', 'height', etc., need a constant size container.
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sheet.insertRule(":root { height: 200px; width: 500px }", sheet.cssRules.length);
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window[prereqprop] = sheet.cssRules[sheet.insertRule(":root > * {}", sheet.cssRules.length)];
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}
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function test_property(property)
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{
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var info = gCSSProperties[property];
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var keywords = ["initial"];
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if (!info.inherited && gTestUnset)
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keywords.push("unset");
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keywords.forEach(function(keyword) {
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if ("prerequisites" in info) {
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var prereqs = info.prerequisites;
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for (var prereq in prereqs) {
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gRule1.style.setProperty(prereq, prereqs[prereq], "");
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gInitialPrereqsRuleN.style.setProperty(prereq, prereqs[prereq], "");
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gInitialPrereqsRuleF.style.setProperty(prereq, prereqs[prereq], "");
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}
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}
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if (info.inherited) {
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gElementN.parentNode.style.setProperty(property, info.other_values[0], "");
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gElementF.parentNode.style.setProperty(property, info.other_values[0], "");
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}
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var initial_computed_n = get_computed_value(gInitialValuesN, property);
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var initial_computed_f = get_computed_value(gInitialValuesF, property);
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gRule1.style.setProperty(property, info.other_values[0], "");
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var other_computed_n = get_computed_value(getComputedStyle(gElementN, ""), property);
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var other_computed_f = get_computed_value(getComputedStyle(gElementF, ""), property);
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isnot(other_computed_n, initial_computed_n,
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"should be testing with values that compute to different things " +
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"for '" + property + "'");
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isnot(other_computed_f, initial_computed_f,
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"should be testing with values that compute to different things " +
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"for '" + property + "'");
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// It's important (given the current design of nsRuleNode) that we're
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// modifying the most specific rule that matches the element, and that
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// we've already requested style while that rule was empty. This
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// means we'll have a cached aStartStruct from the parent in the rule
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// tree (caching the "other" value), so we'll make sure we don't get
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// the initial value from the luck of default-initialization.
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// This means that it's important that we set the prereqs on
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// gRule1.style rather than on gElement.style.
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gRule2.style.setProperty(property, keyword, "");
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var initial_val_computed_n = get_computed_value(getComputedStyle(gElementN, ""), property);
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var initial_val_computed_f = get_computed_value(getComputedStyle(gElementF, ""), property);
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(xfail_initial(property) ? todo_is : is)(
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initial_val_computed_n, initial_computed_n,
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keyword + " should cause initial value for '" + property + "'");
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(xfail_initial(property) ? todo_is : is)(
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initial_val_computed_f, initial_computed_f,
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keyword + " should cause initial value for '" + property + "'");
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gRule1.style.removeProperty(property);
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gRule2.style.removeProperty(property);
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if ("prerequisites" in info) {
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var prereqs = info.prerequisites;
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for (var prereq in prereqs) {
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gRule1.style.removeProperty(prereq);
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gInitialPrereqsRuleN.style.removeProperty(prereq);
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gInitialPrereqsRuleF.style.removeProperty(prereq);
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}
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}
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if (info.inherited) {
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gElementN.parentNode.style.removeProperty(property);
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gElementF.parentNode.style.removeProperty(property);
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}
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// FIXME: Something (maybe with the -moz-binding values in
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// test_value_computation.html, but may as well do it here to match)
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// causes gElementF's frame to get lost. Force it to get recreated
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// after each property.
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gElementF.parentNode.style.display = "none";
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get_computed_value(getComputedStyle(gElementF, ""), "width");
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gElementF.parentNode.style.display = "";
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get_computed_value(getComputedStyle(gElementF, ""), "width");
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});
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}
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function run_tests() {
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setup_initial_values("unstyledn", "gInitialValuesN", "gInitialPrereqsRuleN");
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setup_initial_values("unstyledf", "gInitialValuesF", "gInitialPrereqsRuleF");
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for (var prop in gCSSProperties)
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test_property(prop);
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SimpleTest.finish();
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}
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load_done();
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</script>
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</pre>
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</body>
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</html>
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