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<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=795785
-->
<head>
  <title>Test for Bug 795785</title>
  <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <script src="/tests/SimpleTest/EventUtils.js"></script>
  <script src="/tests/gfx/layers/apz/test/mochitest/apz_test_utils.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=795785">Mozilla Bug 795785</a>
<div id="display">
  <textarea style="overflow: hidden; height: 3em; width: 5em; word-wrap: normal;"></textarea>
  <div contenteditable style="overflow: hidden; height: 3em; width: 5em;"></div>
</div>
<div id="content" style="display: none">

</div>
<pre id="test">
</pre>

<script>
"use strict";

function waitForScroll() {
  return waitToClearOutAnyPotentialScrolls(window);
}

async function synthesizeKeyInEachEventLoop(aKey, aEvent, aCount) {
  for (let i = 0; i < aCount; i++) {
    synthesizeKey(aKey, aEvent);
    await new Promise(resolve => SimpleTest.executeSoon(resolve));
  }
}

async function sendStringOneByOne(aString) {
  for (const ch of aString) {
    sendString(ch);
    await new Promise(resolve => SimpleTest.executeSoon(resolve));
  }
}

async function doKeyEventTest(aSelector) {
  const element = document.querySelector(aSelector);
  if (element.value !== undefined) {
    element.value = "";
  } else {
    element.innerHTML = "";
  }
  element.focus();
  element.scrollTop = 0;
  await waitForScroll();
  is(element.scrollTop, 0, `${aSelector}.scrollTop should be 0`);
  await synthesizeKeyInEachEventLoop("KEY_Enter", {shiftKey: true}, 6);
  await waitForScroll();
  isnot(element.scrollTop, 0, `${aSelector} should be scrolled by inserting line breaks`);
  const oldScrollTop = element.scrollTop;
  await synthesizeKeyInEachEventLoop("KEY_ArrowUp", {}, 5);
  await waitForScroll();
  isnot(element.scrollTop, oldScrollTop, `${aSelector} should be scrolled by up key events`);
  await synthesizeKeyInEachEventLoop("KEY_ArrowDown", {}, 5);
  await waitForScroll();
  is(element.scrollTop, oldScrollTop, `${aSelector} should be scrolled by down key events`);
  const longWord = "aaaaaaaaaaaaaaaaaaaa";
  await sendStringOneByOne(longWord);
  await waitForScroll();
  isnot(element.scrollLeft, 0, `${aSelector} should be scrolled by typing long word`);
  const oldScrollLeft = element.scrollLeft;
  await synthesizeKeyInEachEventLoop("KEY_ArrowLeft", {}, longWord.length);
  await waitForScroll();
  isnot(element.scrollLeft, oldScrollLeft, `${aSelector} should be scrolled by left key events`);
  await synthesizeKeyInEachEventLoop("KEY_ArrowRight", {}, longWord.length);
  await waitForScroll();
  is(element.scrollLeft, oldScrollLeft, `${aSelector} should be scrolled by right key events`);
}

async function doCompositionTest(aSelector) {
  const element = document.querySelector(aSelector);
  if (element.value !== undefined) {
    element.value = "";
  } else {
    element.innerHTML = "";
  }
  element.focus();
  element.scrollTop = 0;
  await waitForScroll();
  is(element.scrollTop, 0, `${aSelector}.scrollTop should be 0`);
  const longCompositionString =
    "Web \u958b\u767a\u8005\u306e\u7686\u3055\u3093\u306f\u3001" +
    "Firefox \u306b\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b HTML5" +
    " \u3084 CSS \u306e\u65b0\u6a5f\u80fd\u3092\u6d3b\u7528\u3059" +
    "\u308b\u3053\u3068\u3067\u3001\u9b45\u529b\u3042\u308b Web " +
    "\u30b5\u30a4\u30c8\u3084\u9769\u65b0\u7684\u306a Web \u30a2" +
    "\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u3088\u308a" +
    "\u77ed\u6642\u9593\u3067\u7c21\u5358\u306b\u4f5c\u6210\u3067" +
    "\u304d\u307e\u3059\u3002";
  synthesizeCompositionChange(
    {
      composition: {
        string: longCompositionString,
        clauses: [
          {
            length: longCompositionString.length,
            attr: COMPOSITION_ATTR_RAW_CLAUSE,
          },
        ],
      },
      caret: {
        start: longCompositionString.length,
        length: 0,
      },
    }
  );
  await waitForScroll();
  isnot(element.scrollTop, 0, `${aSelector} should be scrolled by composition`);
  synthesizeComposition({ type: "compositioncommit", data: "" });
  await waitForScroll();
  is(
    element.scrollTop,
    0,
    `${aSelector} should be scrolled back to the top by canceling composition`
  );
}

SimpleTest.waitForExplicitFinish();
SimpleTest.waitForFocus(async () => {
  // Turn off spatial navigation because it hijacks arrow key events and
  // VK_RETURN events.
  await SpecialPowers.pushPrefEnv({"set": [["snav.enabled", false]]});

  await doKeyEventTest("textarea");
  await doKeyEventTest("div[contenteditable]");
  await doCompositionTest("textarea");
  await doCompositionTest("div[contenteditable]");
  SimpleTest.finish();
});
</script>
</body>

</html>