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<!doctype html>
<title>Test for nsSelectionMoveCommands</title>
<link rel=stylesheet href="/tests/SimpleTest/test.css">
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=454004">Mozilla Bug 454004</a>

<iframe id="edit" width="200" height="100" src="about:blank"></iframe>

<script>
SimpleTest.waitForExplicitFinish();
SimpleTest.requestFlakyTimeout("Legacy test, possibly no good reason");

var winUtils = SpecialPowers.getDOMWindowUtils(window);

async function setup() {
  await SpecialPowers.pushPrefEnv({set: [["general.smoothScroll", false]]});
  winUtils.advanceTimeAndRefresh(100);
}

async function* runTests() {
  var e = document.getElementById("edit");
  var doc = e.contentDocument;
  var win = e.contentWindow;
  var root = doc.documentElement;
  var body = doc.body;

  body.style.fontSize = "16px";
  body.style.lineHeight = "16px";
  body.style.height = "400px";
  body.style.padding = "0px";
  body.style.margin = "0px";
  body.style.borderWidth = "0px";

  var sel = win.getSelection();
  doc.designMode = "on";
  body.innerHTML = "1<br>2<br>3<br>4<br>5<br>6<br>7<br>8<br>9<br>10<br>11<br>12<br>";
  win.focus();
  // Flush out layout to make sure that the subdocument will be the size we
  // expect by the time we try to scroll it.
  is(body.getBoundingClientRect().height, 400,
     "Body height should be what we set it to");
  yield;

  function testScrollCommand(cmd, expectTop) {
    // http://dev.w3.org/csswg/cssom-view/#dom-element-getboundingclientrect
    // doesn't explicitly rule out -0 here, but for now assume that only
    // positive zeroes are permitted.
    is(root.getBoundingClientRect().top, -expectTop + 0, cmd);
  }

  function testMoveCommand(cmd, expectNode, expectOffset) {
    SpecialPowers.doCommand(window, cmd);
    is(sel.isCollapsed, true, "collapsed after " + cmd);
    is(sel.anchorNode, expectNode, "node after " + cmd);
    is(sel.anchorOffset, expectOffset, "offset after " + cmd);
  }

  function findChildNum(element, child) {
    var i = 0;
    var n = element.firstChild;
    while (n && n != child) {
      n = n.nextSibling;
      ++i;
    }
    if (!n)
      return -1;
    return i;
  }

  function testPageMoveCommand(cmd, expectOffset) {
    SpecialPowers.doCommand(window, cmd);
    is(sel.isCollapsed, true, "collapsed after " + cmd);
    is(sel.anchorOffset, expectOffset, "offset after " + cmd);
    return findChildNum(body, sel.anchorNode);
  }

  function testSelectCommand(cmd, expectNode, expectOffset) {
    var anchorNode = sel.anchorNode;
    var anchorOffset = sel.anchorOffset;
    SpecialPowers.doCommand(window, cmd);
    is(sel.isCollapsed, false, "not collapsed after " + cmd);
    is(sel.anchorNode, anchorNode, "anchor not moved after " + cmd);
    is(sel.anchorOffset, anchorOffset, "anchor not moved after " + cmd);
    is(sel.focusNode, expectNode, "node after " + cmd);
    is(sel.focusOffset, expectOffset, "offset after " + cmd);
  }

  function testPageSelectCommand(cmd, expectOffset) {
    var anchorNode = sel.anchorNode;
    var anchorOffset = sel.anchorOffset;
    SpecialPowers.doCommand(window, cmd);
    is(sel.isCollapsed, false, "not collapsed after " + cmd);
    is(sel.anchorNode, anchorNode, "anchor not moved after " + cmd);
    is(sel.anchorOffset, anchorOffset, "anchor not moved after " + cmd);
    is(sel.focusOffset, expectOffset, "offset after " + cmd);
    return findChildNum(body, sel.focusNode);
  }

  function node(i) {
    var n = body.firstChild;
    while (i > 0) {
      n = n.nextSibling;
      --i;
    }
    return n;
  }

  SpecialPowers.doCommand(window, "cmd_scrollBottom");
  yield;
  testScrollCommand("cmd_scrollBottom", root.scrollHeight - 100);
  SpecialPowers.doCommand(window, "cmd_scrollTop");
  yield;
  testScrollCommand("cmd_scrollTop", 0);

  SpecialPowers.doCommand(window, "cmd_scrollPageDown");
  yield;
  var pageHeight = -root.getBoundingClientRect().top;
  ok(pageHeight > 0, "cmd_scrollPageDown works");
  ok(pageHeight <= 100, "cmd_scrollPageDown doesn't scroll too much");
  SpecialPowers.doCommand(window, "cmd_scrollBottom");
  SpecialPowers.doCommand(window, "cmd_scrollPageUp");
  yield;
  testScrollCommand("cmd_scrollPageUp", root.scrollHeight - 100 - pageHeight);

  SpecialPowers.doCommand(window, "cmd_scrollTop");
  SpecialPowers.doCommand(window, "cmd_scrollLineDown");
  yield;
  var lineHeight = -root.getBoundingClientRect().top;
  ok(lineHeight > 0, "Can scroll by lines");
  SpecialPowers.doCommand(window, "cmd_scrollBottom");
  SpecialPowers.doCommand(window, "cmd_scrollLineUp");
  yield;
  testScrollCommand("cmd_scrollLineUp", root.scrollHeight - 100 - lineHeight);

  var runSelectionTests = function(selectWordNextNode, selectWordNextOffset) {
    testMoveCommand("cmd_moveBottom", body, 23);
    testMoveCommand("cmd_moveTop", node(0), 0);
    testSelectCommand("cmd_selectBottom", body, 23);
    SpecialPowers.doCommand(window, "cmd_moveBottom");
    testSelectCommand("cmd_selectTop", node(0), 0);

    SpecialPowers.doCommand(window, "cmd_moveTop");
    testMoveCommand("cmd_lineNext", node(2), 0);
    testMoveCommand("cmd_linePrevious", node(0), 0);
    testSelectCommand("cmd_selectLineNext", node(2), 0);
    SpecialPowers.doCommand(window, "cmd_moveBottom");
    testSelectCommand("cmd_selectLinePrevious", node(20), 2);

    SpecialPowers.doCommand(window, "cmd_moveBottom");
    testMoveCommand("cmd_charPrevious", node(22), 1);
    testMoveCommand("cmd_charNext", node(22), 2);
    testSelectCommand("cmd_selectCharPrevious", node(22), 1);
    SpecialPowers.doCommand(window, "cmd_moveTop");
    testSelectCommand("cmd_selectCharNext", node(0), 1);

    SpecialPowers.doCommand(window, "cmd_moveTop");
    testMoveCommand("cmd_endLine", node(0), 1);
    testMoveCommand("cmd_beginLine", node(0), 0);
    testSelectCommand("cmd_selectEndLine", node(0), 1);
    SpecialPowers.doCommand(window, "cmd_moveBottom");
    testSelectCommand("cmd_selectBeginLine", node(22), 0);

    SpecialPowers.doCommand(window, "cmd_moveBottom");
    testMoveCommand("cmd_wordPrevious", node(22), 0);
    testMoveCommand("cmd_wordNext", body, 23);
    testSelectCommand("cmd_selectWordPrevious", node(22), 0);
    SpecialPowers.doCommand(window, "cmd_moveTop");
    testSelectCommand("cmd_selectWordNext", selectWordNextNode, selectWordNextOffset);

    SpecialPowers.doCommand(window, "cmd_moveTop");
    var lineNum = testPageMoveCommand("cmd_movePageDown", 0);
    ok(lineNum > 0, "cmd_movePageDown works");
    SpecialPowers.doCommand(window, "cmd_moveBottom");
    SpecialPowers.doCommand(window, "cmd_beginLine");
    is(testPageMoveCommand("cmd_movePageUp", 0), 22 - lineNum, "cmd_movePageUp");

    SpecialPowers.doCommand(window, "cmd_moveTop");
    is(testPageSelectCommand("cmd_selectPageDown", 0), lineNum, "cmd_selectPageDown");
    SpecialPowers.doCommand(window, "cmd_moveBottom");
    SpecialPowers.doCommand(window, "cmd_beginLine");
    is(testPageSelectCommand("cmd_selectPageUp", 0), 22 - lineNum, "cmd_selectPageUp");
  };

  await SpecialPowers.pushPrefEnv({set: [["layout.word_select.eat_space_to_next_word", false]]});
  runSelectionTests(body, 1);
  await SpecialPowers.pushPrefEnv({set: [["layout.word_select.eat_space_to_next_word", true]]});
  runSelectionTests(node(2), 0);
}

function cleanup() {
  winUtils.restoreNormalRefresh();
  SimpleTest.finish();
}

async function testRunner() {
  let curTest = runTests();
  while (true) {
    winUtils.advanceTimeAndRefresh(100);
    if ((await curTest.next()).done) {
      break;
    }
    winUtils.advanceTimeAndRefresh(100);
    await new Promise(resolve => setTimeout(resolve, 20));
  }
}

setup()
  .then(() => testRunner())
  .then(() => cleanup())
  .catch(err => ok(false, err));
</script>