/**

 * Volume widget presentation code

 * 

 * Greyhound - real web management for Amarok

 * Copyright (C) 2008 Dan Fuhry

 *

 * This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied

 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.

 */

var current_volume = 0;

function set_volume_fill(amount)

{

  amount = 10 * ( Math.round(amount / 10) );

  if ( amount == 0 )

    amount = -10;

  for ( var i = 0; i <= amount; i += 10 )

  {

    if ( !$('volbtn_' + i).hasClass('volume_button_active') )

    {

      $('volbtn_' + i).addClass('volume_button_active');

    }

  }

  for ( ; i <= 100; i += 10 )

  {

    if ( $('volbtn_' + i).hasClass('volume_button_active') )

    {

      $('volbtn_' + i).rmClass('volume_button_active');

    }

  }

}

function volume_over(amount)

{

  set_volume_fill(amount);

}

function volume_out()

{

  set_volume_fill(current_volume);

}

function set_volume(level)

{

  setAjaxLoading();

  if ( level == current_volume )

    return false;

  ajaxGet('/action.json/volume/' + level, function()

    {

      if ( ajax.readyState == 4 && ajax.status == 200 )

      {

        unsetAjaxLoading();

        var response = (' ' + ajax.responseText).substr(1);

        // quickie JSON parser :)

        response = eval('(' + response + ')');

        // update volume

        if ( response.volume != current_volume )

        {

          set_volume_fill(response.volume);

          current_volume = response.volume;

        }

      }

    });

}

function volume_custom_form()

{

  if ( $('volumebox').object )

  {

    return false;

  }

  var box = document.createElement('div');

  $(box)

    .css('position', 'absolute')

    .css('padding', '50px 80px')

    .css('background-image', 'url(/trans80.png)')

    .css('color', 'black')

    .css('text-align', 'center')

    .attr('id', 'volumebox')

    .insertText('volume:')

    .insertBR().insertBR()

    .opacity(0);

  document.body.appendChild(box);

  var field = document.createElement('input');

  $(field)

    .attr('type', 'text')

    .attr('value', '')

    .attr('size', '7')

    .css('text-align', 'center');

  box.appendChild(field);

  $(box)

    .css('top',  (( getHeight() / 2 ) - ( $(box).Height() / 2 ) + getScrollOffset()) + 'px')

    .css('left', (( $(document.body).Width() / 2 ) - ( $(box).Width() / 2 )) + 'px');

  $(box).fadeIn(250);

  field.focus();

  field.onkeyup = function(e)

  {

    if ( e.keyCode == 13 || e.keyCode == 27 )

    {

      if ( this.value == '' || e.keyCode == 27 )

      {

        $(this.parentNode).fadeOut(250, function(o)

          {

            o.parentNode.removeChild(o);

          });

      }

      else if ( !this.value.match(/^[0-9]+$/) )

      {

        $(this.parentNode).insertBR().insertText('please enter a number');

      }

      else

      {

        set_volume(parseInt(this.value));

        $(this.parentNode).fadeOut(250, function(o)

          {

            o.parentNode.removeChild(o);

          });

      }

    }

  }

}

addOnloadHook(function()

  {

    window.onkeyup = function(e)

    {

      if ( e.keyCode == 86 )

      {

        volume_custom_form();

      }

    }

  });

function getHeight() {

  var myHeight = 0;

  if( typeof( window.innerWidth ) == 'number' ) {

    myHeight = window.innerHeight;

  } else if( document.documentElement &&

      ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {

    myHeight = document.documentElement.clientHeight;

  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {

    myHeight = document.body.clientHeight;

  }

  return myHeight;

}

function getWidth() {

  var myWidth = 0;

  if( typeof( window.innerWidth ) == 'number' ) {

    myWidth = window.innerWidth;

  } else if( document.documentElement &&

      ( document.documentElement.clientWidth || document.documentElement.clientWidth ) ) {

    myWidth = document.documentElement.clientWidth;

  } else if( document.body && ( document.body.clientWidth || document.body.clientWidth ) ) {

    myWidth = document.body.clientWidth;

  }

  return myWidth;

}

function getScrollOffset(el)

{

  var position;

  var s = el || self;

  el = el || document;

  if ( el.scrollTop )

  {

    position = el.scrollTop;

  }

  else if (s.pageYOffset)

  {

    position = self.pageYOffset;

  }

  else if (document.documentElement && document.documentElement.scrollTop)

  {

    position = document.documentElement.scrollTop;

  }

  else if (document.body)

  {

    position = document.body.scrollTop;

  }

  return position;

}