helper_doubletap_zoom_square.html

Enable keyboard shortcuts

<!DOCTYPE HTML>

<html>

<head>

  <meta charset="utf-8">

  <meta name="viewport" content="width=2100"/>

  <title>Check that double tapping on a square img doesn't cut off parts of the image</title>

  <script type="application/javascript" src="apz_test_native_event_utils.js"></script>

  <script type="application/javascript" src="apz_test_utils.js"></script>

  <script src="/tests/SimpleTest/paint_listener.js"></script>

  <script type="application/javascript">

async function test() {

  let useTouchpad = (location.search == "?touchpad");

  let resolution = await getResolution();

  let initial_resolution = resolution;

  ok(resolution > 0,

     "The initial_resolution is " + resolution + ", which is some sane value");

  let target = document.getElementById("target");

  // Check that double-tapping once on the element zooms in

  info("sending first double tap");

  await doubleTapOn(target, 20, 20, useTouchpad);

  let prev_resolution = resolution;

  resolution = await getResolution();

  ok(resolution > prev_resolution, "The first double-tap has increased the resolution to " + resolution);

  let rect = target.getBoundingClientRect();

  ok(visualViewport.pageLeft < rect.x, `left: ${visualViewport.pageLeft} < ${rect.x}`);

  ok(visualViewport.pageTop < rect.y, `top: ${visualViewport.pageTop} < ${rect.y}`);

  ok(visualViewport.pageLeft + visualViewport.width > rect.x + rect.width,

    `right: ${visualViewport.pageLeft} + ${visualViewport.width} > ${rect.x} + ${rect.width}`);

  ok(visualViewport.pageTop + visualViewport.height > rect.y + rect.height,

    `bottom: ${visualViewport.pageTop} + ${visualViewport.height} > ${rect.y} + ${rect.height}`);

  // Check that double-tapping the second time on the element zooms out

  info("sending second double tap");

  await doubleTapOn(target, 20, 20, useTouchpad);

  prev_resolution = resolution;

  resolution = await getResolution();

  ok(resolution < prev_resolution, "The second double-tap has decreased the resolution to " + resolution);

  ok(resolution == initial_resolution, "The second double-tap has restored the resolution to " + resolution);

waitUntilApzStable()

.then(test)

.then(subtestDone, subtestFailed);

  </script>

  <style>

    .bigsquare {

      width: 40vh;

      height: 40vh;

</style>

</head>

<body>

<img id="target" class="bigsquare" src="green100x100.png">

</body>

</html>