jquery.fitvids.js

/*global jQuery */
/*!
* FitVids 1.0
*
* Copyright 2011, Chris Coyier - http://css-tricks.com + Dave Rupert - http://daverupert.com
* Credit to Thierry Koblentz - http://www.alistapart.com/articles/creating-intrinsic-ratios-for-video/
* Released under the WTFPL license - http://sam.zoy.org/wtfpl/
*
* Date: Thu Sept 01 18:00:00 2011 -0500
*/

(function( $ ){

  $.fn.fitVids = function( options ) {
    var settings = {
      customSelector: null
    }

    var div = document.createElement('div'),
        ref = document.getElementsByTagName('base')[0] || document.getElementsByTagName('script')[0];

    div.className = 'fit-vids-style';
    div.innerHTML = '&shy;<style>         \
      .fluid-width-video-wrapper {        \
         width: 100%;                     \
         position: relative;              \
         padding: 0;                      \
      }                                   \
                                          \
      .fluid-width-video-wrapper iframe,  \
      .fluid-width-video-wrapper object,  \
      .fluid-width-video-wrapper embed {  \
         position: absolute;              \
         top: 0;                          \
         left: 0;                         \
         width: 100%;                     \
         height: 100%;                    \
      }                                   \
    </style>';

    ref.parentNode.insertBefore(div,ref);

    if ( options ) {
      $.extend( settings, options );
    }

    return this.each(function(){
      var selectors = [
        "iframe[src*='player.vimeo.com']",
        "iframe[src*='www.youtube.com']",
        "iframe[src*='www.kickstarter.com']",
        "object",
        "embed"
      ];

      if (settings.customSelector) {
        selectors.push(settings.customSelector);
      }

      var $allVideos = $(this).find(selectors.join(','));

      $allVideos.each(function(){
        var $this = $(this);
        if (this.tagName.toLowerCase() == 'embed' && $this.parent('object').length || $this.parent('.fluid-width-video-wrapper').length) { return; }
        var height = ( this.tagName.toLowerCase() == 'object' || $this.attr('height') ) ? $this.attr('height') : $this.height(),
            width = $this.attr('width') ? $this.attr('width') : $this.width(),
            aspectRatio = height / width;
        if(!$this.attr('id')){
          var videoID = 'fitvid' + Math.floor(Math.random()*999999);
          $this.attr('id', videoID);
        }
        $this.wrap('<div class="fluid-width-video-wrapper"></div>').parent('.fluid-width-video-wrapper').css('padding-top', (aspectRatio * 100)+"%");
        $this.removeAttr('height').removeAttr('width');
      });
    });
  }
})( jQuery );