tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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test_addSheet.html (4123B)

      1 <!DOCTYPE HTML>
      2 <html>
      3 <head>
      4  <title>Test for addSheet</title>
      5  <script src="/tests/SimpleTest/SimpleTest.js"></script>
      6  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
      7 </head>
      8 <body>
      9 <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1024707">Mozilla Bug 1024707</a>
     10 
     11 <iframe id="iframe1" src="additional_sheets_helper.html"></iframe>
     12 <iframe id="iframe2" src="additional_sheets_helper.html"></iframe>
     13 
     14 <pre id="test">
     15 <script type="application/javascript">
     16 
     17 let gIOService = SpecialPowers.Cc["@mozilla.org/network/io-service;1"]
     18  .getService(SpecialPowers.Ci.nsIIOService);
     19 
     20 let gSSService = SpecialPowers.Cc["@mozilla.org/content/style-sheet-service;1"]
     21  .getService(SpecialPowers.Ci.nsIStyleSheetService);
     22 
     23 function test(win, sheet) {
     24  let cs = win.getComputedStyle(win.document.body);
     25  is(cs.getPropertyValue("color"), "rgb(0, 0, 0)", "should have default color");
     26  var windowUtils = SpecialPowers.getDOMWindowUtils(win);
     27  windowUtils.addSheet(sheet, SpecialPowers.Ci.nsIDOMWindowUtils.USER_SHEET);
     28  is(cs.getPropertyValue("color"), "rgb(255, 0, 0)", "should have changed color to red");
     29 }
     30 
     31 function onDocumentElementInserted(url, callback) {
     32  const obs = SpecialPowers.Services.obs;
     33  function observer(doc) {
     34    if (doc.URL === url) {
     35      obs.removeObserver(observer, "document-element-inserted");
     36      callback(doc);
     37    }
     38  };
     39  obs.addObserver(observer, "document-element-inserted");
     40 }
     41 
     42 // Resolves when the document (and iframe1 + iframe2) have loaded.
     43 const loadedPromise = new Promise(resolve => {
     44  window.addEventListener("load", () => resolve(), { once: true });
     45 });
     46 add_setup(async () => loadedPromise);
     47 
     48 add_task(async function test_addSheet_in_existing_frame() {
     49  var uri = gIOService.newURI("data:text/css,body{color:red;}");
     50  let sheet = gSSService.preloadSheet(uri, SpecialPowers.Ci.nsIStyleSheetService.USER_SHEET);
     51 
     52  test(document.getElementById("iframe1").contentWindow, sheet);
     53  test(document.getElementById("iframe2").contentWindow, sheet);
     54 });
     55 
     56 // Regression test for https://bugzilla.mozilla.org/show_bug.cgi?id=1961064
     57 add_task(async function test_addSheet_order_in_new_frame() {
     58  const USER_SHEET = SpecialPowers.Ci.nsIStyleSheetService.USER_SHEET;
     59  var uri1 = gIOService.newURI("data:text/css,body{--css-var:1;}");
     60  var uri2 = gIOService.newURI("data:text/css,body{--css-var:2;}");
     61  var uri3 = gIOService.newURI("data:text/css,body{--css-var:3;}");
     62  var uri4 = gIOService.newURI("data:text/css,body{--css-var:4;}");
     63  let sheet1 = gSSService.preloadSheet(uri1, USER_SHEET);
     64  let sheet2 = gSSService.preloadSheet(uri2, USER_SHEET);
     65  let sheet3 = gSSService.preloadSheet(uri3, USER_SHEET);
     66  let sheet4 = gSSService.preloadSheet(uri4, USER_SHEET);
     67 
     68  let f = document.createElement("iframe");
     69  f.src = "additional_sheets_helper.html?frame";
     70  let elementInsertedPromise = new Promise(resolve => {
     71    onDocumentElementInserted(f.src, doc => {
     72      info("Testing addSheet at document-element-inserted");
     73      // At this point, mStyleSetFilled == false, so the initialization
     74      // of the styles is delayed until Document::FillStyleSet is called:
     75      // https://bugzilla.mozilla.org/show_bug.cgi?id=1961064#c5
     76      let windowUtils = SpecialPowers.getDOMWindowUtils(doc.defaultView);
     77      windowUtils.addSheet(sheet1, USER_SHEET);
     78      windowUtils.addSheet(sheet2, USER_SHEET);
     79      resolve();
     80    });
     81  });
     82  await new Promise(resolve => {
     83    f.onload = resolve;
     84    document.body.append(f);
     85  });
     86  await elementInsertedPromise;
     87  let cs = f.contentWindow.getComputedStyle(f.contentDocument.body);
     88  is(cs.getPropertyValue("--css-var"), "2", "Last addSheet (2) applies last");
     89 
     90  info("Testing addSheet in an existing document");
     91  // At this point, mStyleSetFilled == true, so the style sheets are applied
     92  // immediately.
     93  let windowUtils = SpecialPowers.getDOMWindowUtils(f.contentWindow);
     94  windowUtils.addSheet(sheet3, USER_SHEET);
     95  windowUtils.addSheet(sheet4, USER_SHEET);
     96  is(cs.getPropertyValue("--css-var"), "4", "Last addSheet (4) applies last");
     97 
     98  f.remove();
     99 });
    100 
    101 </script>
    102 </body>
    103 </html>