Quelle browser_layoutHelpers.js Sprache: JAVA

/* Any copyright is dedicated to the Public Domain.
* http://creativecommons.org/publicdomain/zero/1.0/ */

"use strict";

// Tests that scrollIntoViewIfNeeded works properly.
const {
  scrollIntoViewIfNeeded,
} = require("resource://devtools/client/shared/scroll.js");

const TEST_URI = CHROME_URL_ROOT + "doc_layoutHelpers.html";

add_task(async function () {
  const { host, win } = await createHost("bottom", TEST_URI);
  await runTest(win);
  host.destroy();
});

async function runTest(win) {
  const some = win.document.getElementById("some");

  some.style.top = win.innerHeight + "px";
  some.style.left = win.innerWidth + "px";
  // The tests start with a black 2x2 pixels square below bottom right.
  // Do not resize the window during the tests.

  const xPos = Math.floor(win.innerWidth / 2);
  // Above the viewport.
  win.scroll(xPos, win.innerHeight + 2);
  scrollIntoViewIfNeeded(some);
  is(
    win.scrollY,
    Math.floor(win.innerHeight / 2) + 1,
    "Element completely hidden above should appear centered."
  );
  is(win.scrollX, xPos, "scrollX position has not changed.");

  // On the top edge.
  win.scroll(win.innerWidth / 2, win.innerHeight + 1);
  scrollIntoViewIfNeeded(some);
  is(
    win.scrollY,
    win.innerHeight,
    "Element partially visible above should appear above."
  );
  is(win.scrollX, xPos, "scrollX position has not changed.");

  // Just below the viewport.
  win.scroll(win.innerWidth / 2, 0);
  scrollIntoViewIfNeeded(some);
  is(
    win.scrollY,
    Math.floor(win.innerHeight / 2) + 1,
    "Element completely hidden below should appear centered."
  );
  is(win.scrollX, xPos, "scrollX position has not changed.");

  // On the bottom edge.
  win.scroll(win.innerWidth / 2, 1);
  scrollIntoViewIfNeeded(some);
  is(win.scrollY, 2, "Element partially visible below should appear below.");
  is(win.scrollX, xPos, "scrollX position has not changed.");

  // Above the viewport.
  win.scroll(win.innerWidth / 2, win.innerHeight + 2);
  scrollIntoViewIfNeeded(some, false);
  is(
    win.scrollY,
    win.innerHeight,
    "Element completely hidden above should appear above " +
      "if parameter is false."
  );
  is(win.scrollX, xPos, "scrollX position has not changed.");

  // On the top edge.
  win.scroll(win.innerWidth / 2, win.innerHeight + 1);
  scrollIntoViewIfNeeded(some, false);
  is(
    win.scrollY,
    win.innerHeight,
    "Element partially visible above should appear above " +
      "if parameter is false."
  );
  is(win.scrollX, xPos, "scrollX position has not changed.");

  // Below the viewport.
  win.scroll(win.innerWidth / 2, 0);
  scrollIntoViewIfNeeded(some, false);
  is(
    win.scrollY,
    2,
    "Element completely hidden below should appear below " +
      "if parameter is false."
  );
  is(win.scrollX, xPos, "scrollX position has not changed.");

  // On the bottom edge.
  win.scroll(win.innerWidth / 2, 1);
  scrollIntoViewIfNeeded(some, false);
  is(
    win.scrollY,
    2,
    "Element partially visible below should appear below " +
      "if parameter is false."
  );
  is(win.scrollX, xPos, "scrollX position has not changed.");

  // Check smooth flag (scroll goes below the viewport)
  await pushPref("ui.prefersReducedMotion", 0);

  info("Checking smooth flag");
  is(
    win.matchMedia("(prefers-reduced-motion)").matches,
    false,
    "Reduced motion is disabled"
  );

  const other = win.document.getElementById("other");
  other.style.top = win.innerHeight + "px";
  other.style.left = win.innerWidth + "px";
  win.scroll(0, 0);

  scrollIntoViewIfNeeded(other, false, true);
  Assert.less(
    win.scrollY,
    other.clientHeight,
    "Window has not instantly scrolled to the final position"
  );
  await waitUntil(() => win.scrollY === other.clientHeight);
  ok(true, "Window did finish scrolling");
}

quality92%

¤ Dauer der Verarbeitung: 0.1 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.