Quelle test_getMatchingCSSRules.html Sprache: HTML

products/Sources/formale Sprachen/C/Firefox/layout/inspector/tests/test_getMatchingCSSRules.html

<!DOCTYPE HTML>
<html>
<head>
  <title>Test for bug 1359217</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">
</head>
<body>
<iframe id="test"></iframe>
<pre id="log">
<script>
/**
* This test checks that getMatchingCSSRules returns correct style set in
* various cases. To avoid effects from UA sheets, most of the tests use
* an element with "unknowntagname".
*/

const InspectorUtils = SpecialPowers.InspectorUtils;

let iframe = document.getElementById("test");

SimpleTest.waitForExplicitFinish();

function* getStyleRules(elem) {
  let rules = InspectorUtils.getMatchingCSSRules(elem);
  for (let i = 0; i < rules.length; i++) {
    yield rules[i];
  }
}

// This will check that value of z-index property declarations in the
// rules from getMatchingCSSRules matches the given content.
function checkRules(doc, rulesContent, queryStr = "unknowntagname") {
  let elem = doc.querySelector(queryStr);
  let rules = [...getStyleRules(elem)];
  is(rules.length, rulesContent.length, "Rule length should match");
  if (rules.length != rulesContent.length) {
    return;
  }
  for (let i = 0; i < rules.length; i++) {
    let style = rules[i].style;
    let expectation = rulesContent[i].toString();
    is(style.length, 1, "Should contain only one declaration");
    is(style.zIndex, expectation, "Should match expectation");
  }
}

const tests = [
  {
    title: "Add new stylesheet",
    async run(doc) {
      checkRules(doc, [1]);
      let link = doc.createElement("link");
      link.rel = "stylesheet";
      link.href = "getMatchingCSSRules-2.css";
      let load = new Promise(resolve => { link.onload = resolve; });
      doc.head.appendChild(link);
      await load;
      checkRules(doc, [1, 2]);
    },
  },
  {
    title: "Remove stylesheet",
    async run(doc) {
      checkRules(doc, [1]);
      doc.querySelector("link").remove();
      checkRules(doc, []);
    },
  },
  {
    title: "Enable stylesheet",
    async run(doc) {
      // Set disabled flag before we invoke the utils.
      let link = doc.querySelector("link");
      link.sheet.disabled = true;
      checkRules(doc, []);
      link.sheet.disabled = false;
      checkRules(doc, [1]);
    },
  },
  {
    title: "Disable stylesheet",
    async run(doc) {
      checkRules(doc, [1]);
      doc.querySelector("link").sheet.disabled = true;
      checkRules(doc, []);
    },
  },
  {
    title: "Change stylesheet set",
    base: "alternate",
    async run(doc) {
      checkRules(doc, []);
      doc.selectedStyleSheetSet = "x";
      checkRules(doc, [1]);
      doc.selectedStyleSheetSet = "";
      checkRules(doc, []);
    },
  },
  {
    title: "Add and remove rules",
    async run(doc) {
      checkRules(doc, [1]);

      let sheet = doc.querySelector("link").sheet;
      info("Inserting style rule");
      sheet.insertRule("unknowntagname { z-index: 3; }", 1);
      checkRules(doc, [1, 3]);

      info("Removing style rule");
      sheet.deleteRule(0);
      checkRules(doc, [3]);

      info("Inserting media rule");
      sheet.insertRule("@media all { unknowntagname { z-index: 4; } }", 1);
      checkRules(doc, [3, 4]);

      info("Inserting supports rule");
      sheet.insertRule(
        "@supports (z-index: 0) { unknowntagname { z-index: 5; } }", 1);
      checkRules(doc, [3, 5, 4]);

      info("Inserting import rule");
      sheet.insertRule("@import url(getMatchingCSSRules-2.css);", 0);
      // There is no notification we can get when the associated style
      // sheet gets loaded, so we have to query it.
      while (true) {
        try {
          sheet.cssRules[0].styleSheet.cssRules;
          break;
        } catch (e) {
          if (e.name == "InvalidAccessError") {
            await new Promise(resolve => requestAnimationFrame(resolve));
          } else {
            throw e;
          }
        }
      }
      checkRules(doc, [2, 3, 5, 4]);

      info("Removing supports rule");
      sheet.deleteRule(2);
      checkRules(doc, [2, 3, 4]);

      info("Removing media rule");
      sheet.deleteRule(2);
      checkRules(doc, [2, 3]);

      info("Removing import rule");
      sheet.deleteRule(0);
      checkRules(doc, [3]);
    },
  },
  {
    title: "Check UA sheets",
    async run(doc) {
      doc.querySelector("link").remove();
      checkRules(doc, []);
      let elem = doc.querySelector("unknowntagname");
      elem.setAttribute("dir", "");
      let seenUnicodeBidi = false;
      for (let rule of getStyleRules(elem)) {
        if (rule.style.unicodeBidi == "isolate") {
          seenUnicodeBidi = true;
          break;
        }
      }
      ok(seenUnicodeBidi, "Should have unicode-bidi " +
         "declaration from UA stylesheet html.css");
    },
  },
  {
    title: "Check adopted sheets",
    async run(doc, win) {
      checkRules(doc, [1]);
      let sheet = new win.CSSStyleSheet();
      sheet.replaceSync(`unknowntagname { z-index: 5 }`);
      doc.adoptedStyleSheets.push(sheet);
      checkRules(doc, [1, 5]);
    },
  },
];

add_task(async function runTests() {
  for (let i = 0; i < tests.length; i++) {
    let test = tests[i];
    info(`Test ${i}: ${test.title}`);
    iframe.src = "about:blank";
    if (!test.base) {
      test.base = "default";
    }
    iframe.src = `file_getMatchingCSSRules-${test.base}.html`;
    await new Promise(resolve => { iframe.onload = resolve; });
    try {
      await test.run(iframe.contentDocument, iframe.contentWindow);
    } catch (e) {
      ok(false, "JavaScript error: " + e);
    }
  }
});
</script>
</pre>
</body>
</html>

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