// -*- Mode: Javascript; tab-width: 2; indent-tabs-mode: nil; js-indent-level: 2 -*-
// vim: set ts=2 sw=2 et tw=78:
function clearSelection(w) {
  var sel = (w ? w : window).getSelection();
  sel.removeAllRanges();
}

function getNode(e, index) {
  if (!(typeof index === "number")) {
    return index;
  }
  if (index >= 0) {
    return e.childNodes[index];
  }
  while (++index != 0) {
    e = e.parentNode;
  }
  return e;
}

function dragSelectPointsWithData() {
  var event = arguments[0];
  var e = arguments[1];
  var x1 = arguments[2];
  var y1 = arguments[3];
  var x2 = arguments[4];
  var y2 = arguments[5];
  dir = x2 > x1 ? 1 : -1;
  event.type = "mousedown";
  synthesizeMouse(e, x1, y1, event);
  event.type = "mousemove";
  synthesizeMouse(e, x1 + dir, y1, event);
  for (var i = 6; i < arguments.length; ++i) {
    synthesizeMouse(e, arguments[i], y1, event);
  }
  synthesizeMouse(e, x2 - dir, y2, event);
  event.type = "mouseup";
  synthesizeMouse(e, x2, y2, event);
}

function dragSelectPoints() {
  var args = Array.prototype.slice.call(arguments);
  dragSelectPointsWithData.apply(this, [{}].concat(args));
}

function dragSelect() {
  var args = Array.prototype.slice.call(arguments);
  var e = args.shift();
  var x1 = args.shift();
  var x2 = args.shift();
  dragSelectPointsWithData.apply(this, [{}, e, x1, 5, x2, 5].concat(args));
}

function accelDragSelect() {
  var args = Array.prototype.slice.call(arguments);
  var e = args.shift();
  var x1 = args.shift();
  var x2 = args.shift();
  var y = args.length != 0 ? args.shift() : 5;
  dragSelectPointsWithData.apply(
    this,
    [{ accelKey: true }, e, x1, y, x2, y].concat(args)
  );
}

function shiftClick(e, x, y) {
  function pos(p) {
    return typeof p === "undefined" ? 5 : p;
  }
  synthesizeMouse(e, pos(x), pos(y), { shiftKey: true });
}

function keyRepeat(key, data, repeat) {
  while (repeat-- > 0) {
    synthesizeKey(key, data);
  }
}

function keyRight(data) {
  var repeat = arguments.length > 1 ? arguments[1] : 1;
  keyRepeat("VK_RIGHT", data, repeat);
}

function keyLeft(data) {
  var repeat = arguments.length > 1 ? arguments[1] : 1;
  keyRepeat("VK_LEFT", data, repeat);
}

function shiftAccelClick(e, x, y) {
  function pos(p) {
    return typeof p === "undefined" ? 5 : p;
  }
  synthesizeMouse(e, pos(x), pos(y), { shiftKey: true, accelKey: true });
}

function accelClick(e, x, y) {
  function pos(p) {
    return typeof p === "undefined" ? 5 : p;
  }
  synthesizeMouse(e, pos(x), pos(y), { accelKey: true });
}

function addChildRanges(arr, e) {
  var sel = window.getSelection();
  for (i = 0; i < arr.length; ++i) {
    var data = arr[i];
    var r = new Range();
    r.setStart(getNode(e, data[0]), data[1]);
    r.setEnd(getNode(e, data[2]), data[3]);
    sel.addRange(r);
  }
}

function checkText(text, e) {
  var sel = window.getSelection();
  is(sel.toString(), text, e.id + ": selected text");
}

function checkRangeText(text, index) {
  var r = window.getSelection().getRangeAt(index);
  is(r.toString(), text, e.id + ": range[" + index + "].toString()");
}

function checkRangeCount(n, e) {
  var sel = window.getSelection();
  is(sel.rangeCount, n, e.id + ": Selection range count");
}

function checkRangePoints(i, expected, e) {
  var sel = window.getSelection();
  if (i >= sel.rangeCount) {
    return;
  }
  var r = sel.getRangeAt(i);
  is(r.startContainer, expected[0], e.id + ": range.startContainer");
  is(r.startOffset, expected[1], e.id + ": range.startOffset");
  is(r.endContainer, expected[2], e.id + ": range.endContainer");
  is(r.endOffset, expected[3], e.id + ": range.endOffset");
}

function checkRange(i, expected, e) {
  var sel = window.getSelection();
  if (i >= sel.rangeCount) {
    return;
  }
  var r = sel.getRangeAt(i);
  is(
    r.startContainer,
    getNode(e, expected[0]),
    e.id + ": range[" + i + "].startContainer"
  );
  is(r.startOffset, expected[1], e.id + ": range[" + i + "].startOffset");
  is(
    r.endContainer,
    getNode(e, expected[2]),
    e.id + ": range[" + i + "].endContainer"
  );
  is(r.endOffset, expected[3], e.id + ": range[" + i + "].endOffset");
}

function checkRanges(arr, e) {
  checkRangeCount(arr.length, e);
  for (i = 0; i < arr.length; ++i) {
    var expected = arr[i];
    checkRange(i, expected, e);
  }
}