Quelle test_scroll_selection_into_view.html Sprache: HTML

products/Sources/formale Sprachen/C/Firefox/layout/base/tests/test_scroll_selection_into_view.html

<!DOCTYPE HTML>
<html>
<head>
  <title>Test for scrolling selection into view</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>

<pre id="test">
<script class="testbody" type="text/javascript">

var win;
const nsISelectionController = SpecialPowers.Ci.nsISelectionController;

function controllerForWindow(aWin) {
  return SpecialPowers.wrap(aWin)
    .docShell
    .QueryInterface(SpecialPowers.Ci.nsIInterfaceRequestor)
    .getInterface(SpecialPowers.Ci.nsISelectionDisplay)
    .QueryInterface(SpecialPowers.Ci.nsISelectionController);
}

function testCollapsed(id, flags, startAt, expected) {
  var c = win.document.getElementById("c" + id);
  var target = win.document.getElementById("target" + id);
  var controller;
  if (target.contentDocument) {
    controller = controllerForWindow(target.contentWindow);
    target = target.contentDocument.getElementById("target" + id);
  } else {
    controller = controllerForWindow(win);
  }
  var selection = controller.getSelection(nsISelectionController.SELECTION_NORMAL);
  selection.collapse(target.parentNode, 0);
  c.scrollTop = startAt;
  try {
    controller.scrollSelectionIntoView(
      nsISelectionController.SELECTION_NORMAL,
      nsISelectionController.SELECTION_FOCUS_REGION,
      nsISelectionController.SCROLL_SYNCHRONOUS | flags
    );
  } catch (e) {}
  is(c.scrollTop, expected, "Scrolling " + target.id +
     " into view with flags " + flags + ", starting at " + startAt);
}

function doTest() {
  // Test scrolling an element smaller than the scrollport
  testCollapsed("1", nsISelectionController.SCROLL_VERTICAL_START, 0, 400);
  testCollapsed("1", nsISelectionController.SCROLL_VERTICAL_END, 0, 220);
  testCollapsed("1", nsISelectionController.SCROLL_VERTICAL_NEAREST, 0, 220);
  testCollapsed("1", nsISelectionController.SCROLL_VERTICAL_START, 500, 400);
  testCollapsed("1", nsISelectionController.SCROLL_VERTICAL_END, 500, 220);
  testCollapsed("1", nsISelectionController.SCROLL_VERTICAL_NEAREST, 500, 400);

  // overflow:hidden elements should not be scrolled by selection
  // scrolling-into-view
  testCollapsed("2", nsISelectionController.SCROLL_VERTICAL_START, 0, 0);
  testCollapsed("2", nsISelectionController.SCROLL_VERTICAL_END, 0, 0);
  testCollapsed("2", nsISelectionController.SCROLL_VERTICAL_NEAREST, 0, 0);
  testCollapsed("2", nsISelectionController.SCROLL_VERTICAL_START, 500, 500);
  testCollapsed("2", nsISelectionController.SCROLL_VERTICAL_END, 500, 500);
  testCollapsed("2", nsISelectionController.SCROLL_VERTICAL_NEAREST, 500, 500);

  // Test scrolling an element larger than the scrollport
  testCollapsed("3", nsISelectionController.SCROLL_VERTICAL_START, 0, 400);
  testCollapsed("3", nsISelectionController.SCROLL_VERTICAL_END, 0, 500);
  testCollapsed("3", nsISelectionController.SCROLL_VERTICAL_NEAREST, 0, 400);
  testCollapsed("3", nsISelectionController.SCROLL_VERTICAL_START, 1000, 400);
  testCollapsed("3", nsISelectionController.SCROLL_VERTICAL_END, 1000, 500);
  // If the element can't be completely visible, show as much as possible,
  // and don't hide anything which was initially visible.
  testCollapsed("3", nsISelectionController.SCROLL_VERTICAL_NEAREST, 1000, 500);

  // Test scrolling an element larger than the scrollport
  testCollapsed("4", nsISelectionController.SCROLL_VERTICAL_START, 0, 400);
  testCollapsed("4", nsISelectionController.SCROLL_VERTICAL_END, 0, 500);
  testCollapsed("4", nsISelectionController.SCROLL_VERTICAL_NEAREST, 0, 400);
  testCollapsed("4", nsISelectionController.SCROLL_VERTICAL_START, 1000, 400);
  testCollapsed("4", nsISelectionController.SCROLL_VERTICAL_END, 1000, 500);
  // If the element can't be completely visible, show as much as possible,
  // and don't hide anything which was initially visible.
  testCollapsed("4", nsISelectionController.SCROLL_VERTICAL_NEAREST, 1000, 500);

  // Test that scrolling a translated element into view takes
  // account of the transform.
  testCollapsed("5", nsISelectionController.SCROLL_VERTICAL_START, 0, 400);

  // Test that scrolling a scaled element into view takes
  // account of the transform.
  testCollapsed("6", nsISelectionController.SCROLL_VERTICAL_START, 0, 150);

  // Test that scrolling an element with a translated, scrolling container
  // into view takes account of the transform.
  testCollapsed("7", nsISelectionController.SCROLL_VERTICAL_START, 0, 400);

  win.close();
  SimpleTest.finish();
}

function openWindow() {
  win = open("scroll_selection_into_view_window.html", "_blank", "width=500,height=350");
}

SimpleTest.waitForExplicitFinish();
addLoadEvent(openWindow);
</script>
</pre>
</body>

</html>

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