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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=426082
-->
<head>
  <title>Test for Bug 426082</title>
  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <script type="application/javascript" src="/tests/SimpleTest/EventUtils.js"></script>
  <script type="application/javascript" src="/tests/SimpleTest/WindowSnapshot.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
  <style>
    canvas {
      display: none;
    }
  </style>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=426082">Mozilla Bug 426082</a>
<p id="display"></p>
<div id="content" style="display: none">
  
</div>
<p><input type="button" value="Button" id="button"></p>
<p><label for="button" id="label">Label</label></p>
<p id="outside">Something under the label</p>
<pre id="test">
<script type="application/javascript">

/** Test for Bug 426082 **/

var normalButtonCanvas, pressedButtonCanvas, normalFocusedButtonCanvas,
    pressedFocusedButtonCanvas, currentSnapshot, button, label, outside;

function runTests() {
  button = $("button");
  label = $("label");
  outside = $("outside");
  SimpleTest.executeSoon(executeTests);
}

SimpleTest.waitForFocus(runTests);

function isRectContainedInRectFromRegion(rect, region) {
  return Array.some(region, function (r) {
    return rect.left >= r.left &&
           rect.top >= r.top &&
           rect.right <= r.right &&
           rect.bottom <= r.bottom;
  });
}

function paintListener(e) {
  if (isRectContainedInRectFromRegion(buttonRect(), SpecialPowers.wrap(e).clientRects)) {
    gNeedsPaint = false;
    currentSnapshot = takeSnapshot();
  }
}

var gNeedsPaint = false;
function executeTests() {
  var testYielder = tests();
  function execNext() {
    if (!gNeedsPaint) {
      let {done} = testYielder.next();
      if (done) {
        return;
      }
      button.getBoundingClientRect(); // Flush.
      gNeedsPaint = true;
    }
    SimpleTest.executeSoon(execNext);
  }
  execNext();
}

function* tests() {
  window.addEventListener("MozAfterPaint", paintListener);
  normalButtonCanvas = takeSnapshot();
  // Press the button.
  sendMouseEvent("mousemove", button);
  sendMouseEvent("mousedown", button);
  yield undefined;
  pressedFocusedButtonCanvas = takeSnapshot();
  compareSnapshots_(normalButtonCanvas, pressedFocusedButtonCanvas, false, "Pressed focused buttons should look different from normal buttons.");
  // Release.
  sendMouseEvent("mouseup", button);
  yield undefined;
  // make sure the button is focused as this doesn't happen on click on Mac
  button.focus();
  normalFocusedButtonCanvas = takeSnapshot();
  compareSnapshots_(normalFocusedButtonCanvas, pressedFocusedButtonCanvas, false, "Pressed focused buttons should look different from normal focused buttons.");
  // Unfocus the button.
  sendMouseEvent("mousedown", outside);
  sendMouseEvent("mouseup", outside);
  yield undefined;

  // Press the label.
  sendMouseEvent("mousemove", label);
  sendMouseEvent("mousedown", label);
  yield undefined;
  compareSnapshots_(normalButtonCanvas, currentSnapshot, false, "Pressing the label should have pressed the button.");
  pressedButtonCanvas = takeSnapshot();
  // Move the mouse down from the label.
  sendMouseEvent("mousemove", outside);
  yield undefined;
  compareSnapshots_(normalButtonCanvas, currentSnapshot, true, "Moving the mouse down from the label should have unpressed the button.");
  // ... and up again.
  sendMouseEvent("mousemove", label);
  yield undefined;
  compareSnapshots_(pressedButtonCanvas, currentSnapshot, true, "Moving the mouse back on top of the label should have pressed the button.");
  // Release.
  sendMouseEvent("mouseup", label);
  yield undefined;
  var focusOnMouse = (navigator.platform.indexOf("Mac") != 0);
  compareSnapshots_(focusOnMouse ? normalFocusedButtonCanvas : normalButtonCanvas,
                    currentSnapshot, true, "Releasing the mouse over the label should have unpressed" +
                                            (focusOnMouse ? " (and focused)" : "") + " the button.");
  // Press the label and remove it.
  sendMouseEvent("mousemove", label);
  sendMouseEvent("mousedown", label);
  yield undefined;
  label.remove();
  yield undefined;
  compareSnapshots_(normalButtonCanvas, currentSnapshot, true, "Removing the label should have unpressed the button.");
  sendMouseEvent("mouseup", label);
  window.removeEventListener("MozAfterPaint", paintListener);
  window.opener.finishTests();
 }

function sendMouseEvent(t, elem) {
  var r = elem.getBoundingClientRect();
  synthesizeMouse(elem, r.width / 2, r.height / 2, {type: t});
}

function compareSnapshots_(c1, c2, shouldBeIdentical, msg) {
  var [correct, c1url, c2url] = compareSnapshots(c1, c2, shouldBeIdentical);
  if (correct) {
    if (shouldBeIdentical) {
      window.opener.ok(true, msg + " - expected " + c1url);
    } else {
      window.opener.ok(true, msg + " - got " + c1url + " and " + c2url);
    }
  } else {
    if (shouldBeIdentical) {
      window.opener.ok(false, msg + " - expected " + c1url + " but got " + c2url);
    } else {
      window.opener.ok(false, msg + " - expected something other than " + c1url);
    }
  }
}

function takeSnapshot() {
  var r = buttonRect();
  adjustedRect = { left: r.left - 2, top: r.top - 2,
                   width: r.width + 4, height: r.height + 4 };
  return SpecialPowers.snapshotRect(window, adjustedRect);
}

function buttonRect() {
  return button.getBoundingClientRect();
}
</script>
</pre>
</body>
</html>