/**
 * ChromeUtils.js is a set of mochitest utilities that are used to 
 * synthesize events in the browser.  These are only used by 
 * mochitest-chrome tests.  Originally these functions were in 
 * EventUtils.js, but when porting to specialPowers, we didn't want
 * to move unnecessary functions.
 *
 */

/**
 * Synthesize a query text content event.
 *
 * @param aOffset  The character offset.  0 means the first character in the
 *                 selection root.
 * @param aLength  The length of getting text.  If the length is too long,
 *                 the extra length is ignored.
 * @param aWindow  Optional (If null, current |window| will be used)
 * @return         An nsIQueryContentEventResult object.  If this failed,
 *                 the result might be null.
 */
function synthesizeQueryTextContent(aOffset, aLength, aWindow)
{
  var utils = _getDOMWindowUtils(aWindow);
  if (!utils) {
    return nsnull;
  }
  return utils.sendQueryContentEvent(utils.QUERY_TEXT_CONTENT,
                                     aOffset, aLength, 0, 0);
}

/**
 * Synthesize a query caret rect event.
 *
 * @param aOffset  The caret offset.  0 means left side of the first character
 *                 in the selection root.
 * @param aWindow  Optional (If null, current |window| will be used)
 * @return         An nsIQueryContentEventResult object.  If this failed,
 *                 the result might be null.
 */
function synthesizeQueryCaretRect(aOffset, aWindow)
{
  var utils = _getDOMWindowUtils(aWindow);
  if (!utils) {
    return nsnull;
  }
  return utils.sendQueryContentEvent(utils.QUERY_CARET_RECT,
                                     aOffset, 0, 0, 0);
}

/**
 * Synthesize a query text rect event.
 *
 * @param aOffset  The character offset.  0 means the first character in the
 *                 selection root.
 * @param aLength  The length of the text.  If the length is too long,
 *                 the extra length is ignored.
 * @param aWindow  Optional (If null, current |window| will be used)
 * @return         An nsIQueryContentEventResult object.  If this failed,
 *                 the result might be null.
 */
function synthesizeQueryTextRect(aOffset, aLength, aWindow)
{
  var utils = _getDOMWindowUtils(aWindow);
  if (!utils) {
    return nsnull;
  }
  return utils.sendQueryContentEvent(utils.QUERY_TEXT_RECT,
                                     aOffset, aLength, 0, 0);
}

/**
 * Synthesize a query editor rect event.
 *
 * @param aWindow  Optional (If null, current |window| will be used)
 * @return         An nsIQueryContentEventResult object.  If this failed,
 *                 the result might be null.
 */
function synthesizeQueryEditorRect(aWindow)
{
  var utils = _getDOMWindowUtils(aWindow);
  if (!utils) {
    return nsnull;
  }
  return utils.sendQueryContentEvent(utils.QUERY_EDITOR_RECT, 0, 0, 0, 0);
}

/**
 * Synthesize a character at point event.
 *
 * @param aX, aY   The offset in the client area of the DOM window.
 * @param aWindow  Optional (If null, current |window| will be used)
 * @return         An nsIQueryContentEventResult object.  If this failed,
 *                 the result might be null.
 */
function synthesizeCharAtPoint(aX, aY, aWindow)
{
  var utils = _getDOMWindowUtils(aWindow);
  if (!utils) {
    return nsnull;
  }
  return utils.sendQueryContentEvent(utils.QUERY_CHARACTER_AT_POINT,
                                     0, 0, aX, aY);
}

/**
 * Synthesize a selection set event.
 *
 * @param aOffset  The character offset.  0 means the first character in the
 *                 selection root.
 * @param aLength  The length of the text.  If the length is too long,
 *                 the extra length is ignored.
 * @param aReverse If true, the selection is from |aOffset + aLength| to
 *                 |aOffset|.  Otherwise, from |aOffset| to |aOffset + aLength|.
 * @param aWindow  Optional (If null, current |window| will be used)
 * @return         True, if succeeded.  Otherwise false.
 */
function synthesizeSelectionSet(aOffset, aLength, aReverse, aWindow)
{
  var utils = _getDOMWindowUtils(aWindow);
  if (!utils) {
    return false;
  }
  return utils.sendSelectionSetEvent(aOffset, aLength, aReverse);
}