tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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browser_scroll.js (3182B)

      1 /* Any copyright is dedicated to the Public Domain.
      2 http://creativecommons.org/publicdomain/zero/1.0/ */
      3 
      4 "use strict";
      5 
      6 /**
      7 * This test is checking that keyboard scrolling of content in RDM
      8 * behaves correctly, both with and without touch simulation enabled.
      9 */
     10 
     11 const PAINT_LISTENER_JS_URL =
     12  URL_ROOT + "../../../../../../tests/SimpleTest/paint_listener.js";
     13 
     14 const APZ_TEST_UTILS_JS_URL =
     15  URL_ROOT + "../../../../../gfx/layers/apz/test/mochitest/apz_test_utils.js";
     16 
     17 const TEST_URL =
     18  "data:text/html;charset=utf-8," +
     19  '<head><meta name="viewport" content="width=100, height=100"/>' +
     20  '<script src="' +
     21  PAINT_LISTENER_JS_URL +
     22  '"></script>' +
     23  '<script src="' +
     24  APZ_TEST_UTILS_JS_URL +
     25  '"></script>' +
     26  "</head>" +
     27  '<div style="background:blue; width:200px; height:200px"></div>';
     28 
     29 addRDMTask(TEST_URL, async function ({ ui, manager }) {
     30  await setViewportSize(ui, manager, 50, 50);
     31  const browser = ui.getViewportBrowser();
     32 
     33  for (const mv in [true, false]) {
     34    await ui.updateTouchSimulation(mv);
     35 
     36    info("Setting focus on the browser.");
     37    browser.focus();
     38 
     39    await SpecialPowers.spawn(browser, [], async () => {
     40      // First of all, cancel any async scroll animation if there is. If there's
     41      // an on-going async scroll animation triggered by synthesizeKey, below
     42      // scrollTo call scrolls to a position nearby (0, 0) so that this test
     43      // won't work as expected.
     44      await content.wrappedJSObject.cancelScrollAnimation(
     45        content.document.scrollingElement,
     46        content
     47      );
     48 
     49      content.scrollTo(0, 0);
     50    });
     51 
     52    info("Testing scroll behavior with touch simulation " + mv + ".");
     53    await testScrollingOfContent(ui);
     54  }
     55 });
     56 
     57 async function testScrollingOfContent(ui) {
     58  let scroll;
     59 
     60  info("Checking initial scroll conditions.");
     61  const viewportScroll = await getViewportScroll(ui);
     62  is(viewportScroll.x, 0, "Content should load with scrollX 0.");
     63  is(viewportScroll.y, 0, "Content should load with scrollY 0.");
     64 
     65  /**
     66   * Here we're going to send off some arrow key events to trigger scrolling.
     67   * What we would like to be able to do is to await the scroll event and then
     68   * check the scroll position to confirm the amount of scrolling that has
     69   * happened. Unfortunately, APZ makes the scrolling happen asynchronously on
     70   * the compositor thread, and it's very difficult to await the end state of
     71   * the APZ animation -- see the tests in /gfx/layers/apz/test/mochitest for
     72   * an example. For our purposes, it's sufficient to test that the scroll
     73   * event is fired at all, and not worry about the amount of scrolling that
     74   * has occurred at the time of the event. If the key events don't trigger
     75   * scrolling, then no event will be fired and the test will time out.
     76   */
     77  scroll = waitForViewportScroll(ui);
     78  info("Synthesizing an arrow key down.");
     79  EventUtils.synthesizeKey("KEY_ArrowDown");
     80  await scroll;
     81  info("Scroll event was fired after arrow key down.");
     82 
     83  scroll = waitForViewportScroll(ui);
     84  info("Synthesizing an arrow key right.");
     85  EventUtils.synthesizeKey("KEY_ArrowRight");
     86  await scroll;
     87  info("Scroll event was fired after arrow key right.");
     88 }