/* Jesse Ruderman
 * July 18, 2004
 *
 * Remaining problems:
 *   IE sometimes crashes on exit after using the this script.
 *   In IE, it is a little ugly because IE doesn't support border-radius.
 *   In IE, it does not work at standalone Flash URLs.
 */
function setupSeekBar() {

  setTimeout(initFlashControls, 100);

  function initFlashControls()
  {
    var count = 0;

    function tt(elem)
    {
      if (typeof elem.TotalFrames != "undefined") /* do not coerce elem.StopPlay to bool, because that breaks IE */
      {
        addFlashControls(elem);
        ++count;
      }
    }

    var i, x;

    for (i = 0; x = document.getElementsByTagName("object")[i]; ++i)
      tt(x);

    for (i = 0; x = document.getElementsByTagName("embed")[i]; ++i)
      tt(x);

  }


  function addFlashControls(flash)
  {
    var controlsDiv = document.createElement("div");

    /* Put the controls under the Flash. 
     *
     * If the Flash is an <embed> in an <object>, we do not want to touch the <object>, because that would make
     * Mozilla re-test whether the <object> is broken and reset the <embed>.  So in that case, we put the controls
     * under the <object>.
     */
    var where = flash;
    while (where.parentNode.tagName.toLowerCase() == "object")
      where = where.parentNode;
    where.parentNode.insertBefore(controlsDiv, where.nextSibling);

    /* Construct controls using DOM2 instead of innerHTML.
     * In Mozilla, innerHTML= is like innerText= at standalone flash URLs.
     */
    var table = document.createElement("table");
    controlsDiv.appendChild(table);

    var row = table.insertRow(-1);

    var pauseButton = document.createElement("button");
    pauseButton.appendChild(document.createTextNode("Pause"));
    var buttonCell = row.insertCell(-1);
    buttonCell.appendChild(pauseButton);

    var slider = row.insertCell(-1);
    slider.width = "100%";

    var visibleSlider = document.createElement("div");
    visibleSlider.style.position = "relative";
    visibleSlider.style.height = "10px";
    visibleSlider.style.width = "100%";
    visibleSlider.style.MozBorderRadius = "4px";
    visibleSlider.style.background = "#aaa";
    slider.appendChild(visibleSlider);

    var thumb = document.createElement("div");
    thumb.style.position = "absolute";
    thumb.style.height = "20px";
    thumb.style.width = "10px";
    thumb.style.top = "-5px";
    thumb.style.MozBorderRadius = "4px";
    thumb.style.background = "#666";
    visibleSlider.appendChild(thumb);


    var sliderWidth;
    var paused = false;
    var dragging = false;

    table.width = Math.max(parseInt(flash.width) || 0, 400);

    addEvent(pauseButton, "click", pauseUnpause);
    addEvent(slider, "mousedown", drag);
    addEvent(slider, "drag", function() { return false; }); /* For IE */
    window.setInterval(update, 30);

    function pauseUnpause()
    {
      paused = !paused;

      pauseButton.style.borderStyle = paused ? "inset" : "";

      if (paused)
        flash.StopPlay();
      else
        flash.Play();
    }

    function update()
    {
      sliderWidth = parseInt(getWidth(slider) - getWidth(thumb));

      if (!paused && !dragging)
        thumb.style.left = parseInt(flash.CurrentFrame() / totalFrames() * sliderWidth) + "px";
    }

    function dragMousemove(e)
    {
      var pageX = e.clientX + document.body.scrollLeft; /* cross-browser, unlike e.pageX, which IE does not support */
      var pos = bounds(0, pageX - getX(slider) - 5, sliderWidth);
      var frame = bounds(1, Math.ceil(totalFrames() * pos / sliderWidth), totalFrames() - 2);

      thumb.style.left = pos + "px";

      flash.GotoFrame(frame);
    }

    function release(e)
    {
      removeEvent(document, "mousemove", dragMousemove);
      removeEvent(document, "mouseup", release);
      if (!paused)
        flash.Play();
      dragging = false;
    }

    function drag(e)
    {
      addEvent(document, "mousemove", dragMousemove);
      addEvent(document, "mouseup", release);
      dragging = true;
      dragMousemove(e);
    }

    /* Boring functions, some of which only exist to hide differences between IE and Mozilla. */

function bounds(min, val, max)
{
  return Math.min(Math.max(min, val), max);
}

function totalFrames()
{
  /* This is weird.  TotalFrames differs between IE and Mozilla.  CurrentFrame does not. */

if (typeof flash.TotalFrames == "number")
  return flash.TotalFrames; /* IE */
else if (typeof flash.TotalFrames == "function")
return flash.TotalFrames(); /* Mozilla */
else
  return 1; /* Partially loaded Flash in IE? */
  }

  function getWidth(elem)
  {
    if (document.defaultView && document.defaultView.getComputedStyle)
      return parseFloat(document.defaultView.getComputedStyle(elem,null).getPropertyValue("width")); /* Mozilla */
    else
      return parseFloat(elem.offsetWidth); /* IE (currentStyle.width can be "auto" or "100%") */
  }

  function getX(elem)
  {
    if (!elem) return 0;
    return (elem.offsetLeft) + getX(elem.offsetParent);
  }

  function addEvent(elem, eventName, fun)
  {
    if (elem.addEventListener) /* Mozilla */
      elem.addEventListener(eventName, fun, false);
    else /* IE */
      elem.attachEvent("on" + eventName, fun);
  }

  function removeEvent(elem, eventName, fun)
  {
    if (elem.addEventListener)
      elem.removeEventListener(eventName, fun, false);
    else
      elem.detachEvent("on" + eventName, fun);
  }

}

}