Merge pull request #4614 from luisramos0/base_admin_js

Bring some basic js functions and dependencies from spree_backend

app/assets/javascripts/admin/all.js

@@ -14,6 +14,8 @@
 //= require jquery.powertip
 //= require jquery.cookie
 //= require jquery.jstree/jquery.jstree
+//= require jquery.vAlign
+//= require jquery.horizontalNav
 //= require angular
 //= require angular-resource
 //= require angular-animate
@@ -25,8 +27,13 @@
 //= require lodash.underscore.js
 
 // spree
+//= require spree
+//= require admin/spree-select2
 //= require admin/spree_backend
 //= require modernizr
+//= require spin
+//= require jquery.adaptivemenu
+//= require equalize
 //= require css_browser_selector_dev
 //= require responsive-tables
 //= require admin/spree_paypal_express

app/assets/javascripts/admin/spree/base.js.erb

@@ -0,0 +1,228 @@
+//= require_self
+//= require admin/handlebar_extensions
+//= require admin/variant_autocomplete
+
+/**
+This is a collection of javascript functions and whatnot
+under the spree namespace that do stuff we find helpful.
+Hopefully, this will evolve into a propper class.
+**/
+
+jQuery(function($) {
+  // Make main menu use full width
+  mainMenu = $('.fullwidth-menu')
+  if (typeof mainMenu.horizontalNav === 'function' )
+    mainMenu.horizontalNav({
+      tableDisplay: false,
+      responsiveDelay: 0
+    });
+
+  // Vertical align of checkbox fields
+  if (typeof $('.field.checkbox label').vAlign === 'function' )
+    $('.field.checkbox label').vAlign()
+
+  // if (typeof Spree !== 'undefined') {
+  // $('.main-menu-wrapper ul').AdaptiveMenu({
+  //     text: "<a href='#'><i class='icon-chevron-down'></i> " + Spree.translations.more + "</a>",
+  //     klass: "dropdown"
+  //   });
+  // }
+
+  // Add some tips
+  if (typeof $('.with-tip').powerTip === 'function' ) {
+    $('.with-tip').powerTip({
+       smartPlacement: true,
+       fadeInTime: 50,
+       fadeOutTime: 50,
+       intentPollInterval: 300
+     });
+
+    $('.with-tip').on({
+      powerTipPreRender: function(){
+        $('#powerTip').addClass($(this).attr("data-action"));
+        $('#powerTip').addClass($(this).attr("data-tip-color"));
+      },
+      powerTipClose: function(){
+        $('#powerTip').removeClass($(this).attr("data-action"))
+      }
+    });
+  }
+
+  // Make flash messages dissapear
+  setTimeout('$(".flash").fadeOut()', 5000);
+
+  // Highlight hovered table column
+  $('table tbody tr td.actions a').hover(function(){
+    var tr = $(this).closest('tr');
+    var klass = 'highlight action-' + $(this).attr('data-action')
+    tr.addClass(klass)
+    tr.prev().addClass('before-' + klass);
+  }, function(){
+    var tr = $(this).closest('tr');
+    var klass = 'highlight action-' + $(this).attr('data-action')
+    tr.removeClass(klass)
+    tr.prev().removeClass('before-' + klass);
+  });
+
+  // Trunkate text in page_title that didn't fit
+  var truncate_elements = $('.truncate');
+
+  truncate_elements.each(function(){
+    $(this).trunk8();
+  });
+  $(window).resize(function (event) {
+    truncate_elements.each(function(){
+      $(this).trunk8();
+    })
+  });
+
+  // Make height of dt/dd elements the same
+  if (typeof $("dl").equalize === 'function' )
+    $("dl").equalize('outerHeight');
+});
+
+
+$.fn.visible = function(cond) { this[cond ? 'show' : 'hide' ]() };
+
+// Overriding a broken function in Spree. Bug report at
+// https://github.com/spree/spree/issues/4032
+show_flash_error = function(message) {
+  error_div = $('.flash.error');
+  if (error_div.length > 0) {
+    error_div.html(message);
+    error_div.show();
+  } else {
+    if ($("#content .toolbar").length > 0) {
+      $("#content .toolbar").before('<div class="flash error">' + message + '</div>');
+    } else {
+      $("#progress").before('<div class="flash error">' + message + '</div>');
+    }
+  }
+}
+
+// Apply to individual radio button that makes another element visible when checked
+$.fn.radioControlsVisibilityOfElement = function(dependentElementSelector){
+  if(!this.get(0)){ return  }
+  showValue = this.get(0).value;
+  radioGroup = $("input[name='" + this.get(0).name + "']");
+  radioGroup.each(function(){
+    $(this).click(function(){
+      $(dependentElementSelector).visible(this.checked && this.value == showValue)
+    });
+    if(this.checked){ this.click() }
+  });
+}
+
+$(document).ready(function() {
+  if (typeof Spree !== 'undefined') {
+    handle_date_picker_fields = function(){
+      $('.datepicker').datepicker({
+        dateFormat: Spree.translations.date_picker,
+        dayNames: Spree.translations.abbr_day_names,
+        dayNamesMin: Spree.translations.abbr_day_names,
+        monthNames: Spree.translations.month_names,
+        prevText: Spree.translations.previous,
+        nextText: Spree.translations.next,
+        showOn: "focus"
+      });
+
+      // Correctly display range dates
+      $('.date-range-filter .datepicker-from').datepicker('option', 'onSelect', function(selectedDate) {
+        $(".date-range-filter .datepicker-to" ).datepicker( "option", "minDate", selectedDate );
+      });
+      $('.date-range-filter .datepicker-to').datepicker('option', 'onSelect', function(selectedDate) {
+        $(".date-range-filter .datepicker-from" ).datepicker( "option", "maxDate", selectedDate );
+      });
+    }
+
+    handle_date_picker_fields();
+  }
+
+  $(".observe_field").on('change', function() {
+    target = $(this).attr("data-update");
+    ajax_indicator = $(this).attr("data-ajax-indicator") || '#busy_indicator';
+    $(target).hide();
+    $(ajax_indicator).show();
+    $.ajax({ dataType: 'html',
+             url: $(this).attr("data-base-url")+encodeURIComponent($(this).val()),
+             type: 'get',
+             success: function(data){
+               $(target).html(data);
+               $(ajax_indicator).hide();
+               $(target).show();
+             }
+    });
+  });
+
+  $('.spree_add_fields').click(function() {
+    var target = $(this).data("target");
+    var new_table_row = $(target + ' tr:visible:last').clone();
+    var new_id = new Date().getTime();
+    new_table_row.find("input, select").each(function () {
+      var el = $(this);
+      el.val("");
+      if (typeof el.attr("id") !== 'undefined') el.attr("id", el.attr("id").replace(/\d+/, new_id))
+      if (typeof el.attr("name") !== 'undefined') el.attr("name", el.attr("name").replace(/\d+/, new_id))
+    })
+    // When cloning a new row, set the href of all icons to be an empty "#"
+    // This is so that clicking on them does not perform the actions for the
+    // duplicated row
+    new_table_row.find("a").each(function () {
+      var el = $(this);
+      el.attr('href', '#');
+    })
+    $(target).prepend(new_table_row);
+  })
+
+  // Fix sortable helper
+  var fixHelper = function(e, ui) {
+      ui.children().each(function() {
+          $(this).width($(this).width());
+      });
+      return ui;
+  };
+
+  $('table.sortable').ready(function(){
+    var td_count = $(this).find('tbody tr:first-child td').length
+
+    if (typeof $('table.sortable tbody').sortable !== 'function' )
+      return
+
+    $('table.sortable tbody').sortable(
+      {
+        handle: '.handle',
+        helper: fixHelper,
+        placeholder: 'ui-sortable-placeholder',
+        update: function(event, ui) {
+          $("#progress").show();
+          positions = {};
+          $.each($('table.sortable tbody tr'), function(position, obj){
+            reg = /spree_(\w+_?)+_(\d+)/;
+            parts = reg.exec($(obj).attr('id'));
+            if (parts) {
+              positions['positions['+parts[2]+']'] = position;
+            }
+          });
+          $.ajax({
+            type: 'POST',
+            dataType: 'script',
+            url: $(ui.item).closest("table.sortable").data("sortable-link"),
+            data: positions,
+            success: function(data){ $("#progress").hide(); }
+          });
+        },
+        start: function (event, ui) {
+          // Set correct height for placehoder (from dragged tr)
+          ui.placeholder.height(ui.item.height())
+          // Fix placeholder content to make it correct width
+          ui.placeholder.html("<td colspan='"+(td_count-1)+"'></td><td class='actions'></td>")
+        },
+        stop: function (event, ui) {
+          // Fix odd/even classes after reorder
+          $("table.sortable tr:even").removeClass("odd even").addClass("even");
+          $("table.sortable tr:odd").removeClass("odd even").addClass("odd");
+        }
+
+      });
+  });
+});

app/assets/javascripts/admin/spree/progress.coffee

@@ -0,0 +1,27 @@
+$(document).ready ->
+  opts =
+    lines: 11
+    length: 2
+    width: 3
+    radius: 9
+    corners: 1
+    rotate: 0
+    color: '#fff'
+    speed: 0.8
+    trail: 48
+    shadow: false
+    hwaccel: true
+    className: 'spinner'
+    zIndex: 2e9
+    top: 'auto'
+    left: 'auto'
+
+  target = document.getElementById("spinner")  
+
+  $(document).ajaxStart ->
+    $("#progress").fadeIn()
+    spinner = new Spinner(opts).spin(target)    
+
+  $(document).ajaxStop ->
+    $("#progress").fadeOut()    
+

app/assets/javascripts/admin/spree/spree-select2.js.erb

@@ -0,0 +1,8 @@
+//= require select2
+jQuery(function($) {
+  // Make select beautiful
+  if (typeof $('select.select2').select2 === 'function' )
+    $('select.select2').select2({
+       allowClear: true
+    });
+})

app/assets/javascripts/admin/util.js.erb

@@ -16,22 +16,6 @@ $(document).ready(function() {
   });
 });
 
-// Overriding a broken function in Spree. Bug report at
-// https://github.com/spree/spree/issues/4032
-show_flash_error = function(message) {
-  error_div = $('.flash.error');
-  if (error_div.length > 0) {
-    error_div.html(message);
-    error_div.show();
-  } else {
-    if ($("#content .toolbar").length > 0) {
-      $("#content .toolbar").before('<div class="flash error">' + message + '</div>');
-    } else {
-      $("#progress").before('<div class="flash error">' + message + '</div>');
-    }
-  }
-}
-
 $(document).ready(function(){
   $('a.close').click(function(event){
     event.preventDefault();

app/assets/stylesheets/admin/all.scss

@@ -14,7 +14,6 @@
  *= require_self
 */
 
-
 //************************************************************************//
 //************************************************************************//
 @import 'globals/variables';

app/assets/stylesheets/admin/components/progress.scss

@@ -0,0 +1,38 @@
+@import 'admin/globals/variables';
+@import 'admin/globals/mixins';
+
+#progress { 
+  display: none;
+  position: fixed;
+  top: 0;  
+  z-index: 1000;
+  opacity: 0.8;
+  width: 100%;
+
+  .wrapper {
+    @include border-radius(10px);
+    top: -10px;
+    position: absolute;
+    left: 50%;
+    width: 200px;
+    margin-left: -100px;
+    padding: 11px 0;
+    background-color: $color-3;
+    color: $color-1;
+    text-align: center;
+  }
+
+  #spinner {    
+    position: absolute;
+    top: 10px;
+    left: 50%;
+    margin-left: -5px;
+  }
+
+  .progress-message {
+    font-size: 120%;
+    font-weight: $font-weight-bold;
+    margin-top: 20px;
+    text-transform: uppercase;
+  }
+}

app/assets/stylesheets/admin/globals/functions.scss

@@ -0,0 +1,25 @@
+// Make color very close to white
+@function very-light($color, $adjust: 3){  
+  @if type-of($adjust) == 'number' and $adjust > 0 {
+    @for $i from 0 through 100 {
+      @if lighten($color, $i) == white and ($i - $adjust) > $adjust {
+        @return lighten($color, $i - $adjust);
+      }
+    }
+  }
+  @else {
+    @debug "Please correct $adjust value. It should be number and larger then 0. Currently it is '#{type-of($adjust)}' with value '#{$adjust}'"
+  }
+};
+
+// Quick fix for dynamic variables missing in SASS
+@function get-value($prop, $val, $search) {
+  $n1: index($prop, $search);
+  $n2: index($val, $search);
+
+  @if($n1) {
+    @return nth($val, $n1);
+  } @else {
+    @return nth($prop, $n2);
+  }
+}

app/assets/stylesheets/admin/plugins/select2.scss

@@ -0,0 +1,193 @@
+@import 'admin/globals/functions';
+@import 'admin/globals/variables';
+@import 'admin/globals/mixins';
+
+@import 'admin/shared/forms';
+
+@import 'admin/plugins/font-awesome';
+
+.select2-container {
+  &:hover .select2-choice, &.select2-container-active .select2-choice {
+    background-color: $color-sel-hover-bg !important;
+    border-color: $color-sel-hover-bg !important;
+  }
+  .select2-choice {
+    background-image: none !important;
+    background-color: $color-sel-bg;
+    border: none !important;
+    box-shadow: none !important;
+    @include border-radius($border-radius);
+    color: $color-1 !important;
+    font-size: 90%;
+    height: 31px;
+    line-height: inherit !important;
+    padding: 5px 15px 7px;
+
+    span {
+      display: block;
+      padding: 2px;
+    }
+
+    .select2-search-choice-close {
+      background-image: none !important;
+      font-size: 100% !important;
+      @extend .icon-remove;
+      @extend [class^="icon-"]:before;
+      margin-top: 2px;
+    }
+  }
+
+  &.select2-container-active {
+    .select2-choice {
+      box-shadow: none !important;
+    }
+
+    &.select2-dropdown-open .select2-choice div b {
+      @extend .icon-caret-up
+    }
+  }
+}
+
+.select2-drop {
+  border-color: $color-sel-hover-bg;
+  box-shadow: none !important;
+  z-index: 1000000;
+
+  &.select2-drop-above {
+    border-color: $color-sel-hover-bg;
+  }
+}
+
+.select2-search {
+  @extend .icon-search;
+
+  font-size: 100%;
+  color: darken($color-border, 15);
+  padding: 0 9px 0 0;
+
+  &:before {
+    @extend [class^="icon-"]:before;
+
+    position: absolute;
+    top: 13px;
+    left: 13px;
+  }
+
+  input {
+    @extend input[type="text"];
+
+    padding: 6px 0 6px 25px;
+    margin: 5px 0 0 5px;
+    font-family: $base-font-family;
+    font-size: 90%;
+    box-shadow: none;
+    background-image: none;
+  }
+}
+
+.select2-container .select2-choice .select2-arrow {
+  background-image: none;
+  background: transparent;
+  border: 0;
+
+  b {
+    padding-top: 7px;
+    display: block;
+    width: 100%;
+    height: 100%;
+    background: none;
+    font-family: FontAwesome;
+    font-weight: 200 !important;
+
+    &:before {
+      content: "\f0d7";
+    }
+  }
+}
+
+.select2-results {
+  padding-left: 0 !important;
+
+  li {
+    font-size: 85% !important;
+
+    &.select2-highlighted {
+      .select2-result-label {
+        &, h6 {
+          color: $color-1 !important;
+        }
+      }
+    }
+
+    .select2-result-label {
+      color: $color-body-text;
+      min-height: 22px;
+      clear: both;
+      overflow: auto;
+    }
+
+    &.select2-no-results, &.select2-searching {
+      padding: 5px;
+      background-color: transparent;
+      color: $color-body-text;
+      text-align: center;
+      font-weight: $font-weight-bold;
+      text-transform: uppercase;
+    }
+  }
+
+  .select2-highlighted {
+    background-color: $color-sel-bg;
+  }
+}
+
+.select2-container-multi {
+  &.select2-container-active, &.select2-dropdown-open {
+    .select2-choices {
+      border-color: $color-sel-hover-bg !important;
+      box-shadow: none;
+      border-bottom-left-radius: 0;
+      border-bottom-right-radius: 0;
+    }
+  }
+  .select2-choices {
+    @extend input[type="text"];
+    padding: 6px 3px 3px 3px;
+    box-shadow: none;
+    background-image: none !important;
+
+    .select2-search-choice {
+      @include border-radius($border-radius);
+      margin: 0 0 3px 3px;
+      background-image: none;
+      background-color: $color-sel-bg;
+      border: none;
+      box-shadow: none;
+      color: $color-1 !important;
+      font-size: 85%;
+
+      &:hover {
+        background-color: $color-sel-hover-bg;
+      }
+
+      .select2-search-choice-close {
+        background-image: none !important;
+        font-size: 85% !important;
+        @extend .icon-remove;
+        @extend [class^="icon-"]:before;
+        margin-left: 2px;
+        color: $color-1;
+      }
+    }
+  }
+}
+
+label .select2-container {
+  margin-top: -6px;
+  .select2-choice {
+    span {
+      text-transform: none;
+      font-weight: normal;
+    }
+  }
+}

vendor/assets/javascripts/equalize.js

@@ -0,0 +1,41 @@
+/**
+ * equalize.js
+ * Author & copyright (c) 2012: Tim Svensen
+ * Dual MIT & GPL license
+ *
+ * Page: http://tsvensen.github.com/equalize.js
+ * Repo: https://github.com/tsvensen/equalize.js/
+ *
+ * The jQuery plugin for equalizing the height or width of elements.
+ *
+ * Equalize will accept any of the jQuery Dimension methods:
+ *   height, outerHeight, innerHeight,
+ *   width, outerWidth, innerWidth.
+ *
+ * EXAMPLE
+ * $('.parent').equalize(); // defaults to 'height'
+ * $('.parent').equalize('width'); // equalize the widths
+ */
+(function($, window, document, undefined) {
+
+  $.fn.equalize = function(equalize) {
+    var $containers = this, // this is the jQuery object
+        equalize    = equalize || 'height',
+        type        = (equalize.indexOf('eight') > 0) ? 'height' : 'width';
+
+    if (!$.isFunction($.fn[equalize])) { return false; }
+
+    return $containers.each(function() {
+      var $children = $(this).children(),
+          max = 0; // reset for each container
+
+      $children.each(function() {
+        var value = $(this)[equalize]();  // call height(), outerHeight(), etc.
+        if (value > max) { max = value; } // update max
+      });
+
+      $children.css(type, max +'px'); // add CSS to children
+    });
+  };
+
+}(jQuery, window, document));

vendor/assets/javascripts/jquery.horizontalNav.js

@@ -0,0 +1,141 @@
+/**
+ * jQuery Horizontal Navigation 1.0
+ * https://github.com/sebnitu/horizontalNav
+ *
+ * By Sebastian Nitu - Copyright 2012 - All rights reserved
+ * Author URL: http://sebnitu.com
+ */
+(function($) {
+    
+    $.fn.horizontalNav = function(options) {
+                
+        // Extend our default options with those provided.
+        var opts = $.extend({}, $.fn.horizontalNav.defaults, options);
+        
+        return this.each(function () {
+        
+            // Save our object
+            var $this = $(this);
+            
+            // Build element specific options
+            // This lets me access options with this syntax: o.optionName
+            var o = $.meta ? $.extend({}, opts, $this.data()) : opts;
+            
+            // Save the wrapper. The wrapper is the element that
+            // we figure out what the full width should be
+            if ($this.is('ul')) {
+                var ul_wrap = $this.parent();
+            } else {
+                var ul_wrap = $this;
+            }
+            
+            // let's append a clearfixing element to the ul wrapper
+            ul_wrap.css({ 'zoom' : '1' }).append('<div class="clearHorizontalNav">');
+            $('.clearHorizontalNav').css({
+                'display' : 'block',
+                'overflow' : 'hidden',
+                'visibility' : 'hidden',
+                'width' : 0,
+                'height' : 0,
+                'clear' : 'both'
+            });
+            
+            // Grab elements we'll need and add some default styles
+            var ul = $this.is('ul') ? $this : ul_wrap.find('> ul'), // The unordered list element
+                li = ul.find('> li'), // All list items
+                li_last = li.last(), // Last list item
+                li_count = li.size(), // The number of navigation elements
+                li_a = li.find('> a'); // Remove padding from the links
+            
+            // If set to responsive, re-construct after every browser resize
+            if ( o.responsive === true ) {
+                // Only need to do this for IE7 and below
+                // or if we set tableDisplay to false
+                if ( (o.tableDisplay != true) || ($.browser.msie && parseInt($.browser.version, 10) <= 7) ) {
+                    resizeTrigger( _construct, o.responsiveDelay );
+                }
+            }
+            
+            // Initiate the plugin
+            _construct();
+            
+            // Returns the true inner width of an element
+            // Essentially it's the inner width without padding.
+            function trueInnerWidth(element) {
+                return element.innerWidth() - ( 
+                    parseInt(element.css('padding-left')) + parseInt(element.css('padding-right')) 
+                );
+            }
+            
+            // Call funcion on browser resize
+            function resizeTrigger(callback, delay) {
+                // Delay before function is called
+                delay = delay || 100;   
+                // Call function on resize
+                var resizeTimer;
+                $(window).resize(function() {
+                    clearTimeout(resizeTimer);
+                    resizeTimer = setTimeout(function() {
+                        callback();
+                    }, delay);
+                });
+            }
+            
+            // The heavy lifting of this plugin. This is where we
+            // find and set the appropriate widths for list items
+            function _construct() {
+            
+                if ( (o.tableDisplay != true) || ($.browser.msie && parseInt($.browser.version, 10) <= 7) ) {
+                    
+                    // IE7 doesn't support the "display: table" method
+                    // so we need to do it the hard way.
+                    
+                    // Add some styles
+                    ul.css({ 'float' : 'left' });
+                    li.css({ 'float' : 'left', 'width' : 'auto' });
+                    li_a.css({ 'padding-left' : 0, 'padding-right' : 0 });
+                    
+                    // Grabbing widths and doing some math
+                    var ul_width = trueInnerWidth(ul),
+                        ul_width_outer = ul.outerWidth(true),
+                        ul_width_extra = ul_width_outer - ul_width,
+                        
+                        full_width = trueInnerWidth(ul_wrap),
+                        extra_width = (full_width - ul_width_extra) - ul_width,
+                        li_padding = Math.floor( extra_width / li_count );
+                    
+                    // Cycle through the list items and give them widths
+                    li.each(function(index) {
+                        var li_width = trueInnerWidth( $(this) );
+                        $(this).css({ 'width' : (li_width + li_padding) + 'px' });
+                    });
+                    
+                    // Get the leftover pixels after we set every itms width
+                    var li_last_width = trueInnerWidth(li_last) + ( (full_width - ul_width_extra) - trueInnerWidth(ul) );
+                    // I hate to do this but for some reason Firefox (v13.0) and IE are always
+                    // one pixel off when rendering. So this is a quick fix for that.
+                    if ($.browser.mozilla || $.browser.msie) {
+                        li_last_width = li_last_width - 1;
+                    }
+                    // Add the leftovers to the last navigation item
+                    li_last.css({ 'width' : li_last_width + 'px' });
+                
+                } else {
+                    // Every modern browser supports the "display: table" method
+                    // so this is the best way to do it for them.
+                    ul.css({ 'display' : 'table', 'float' : 'none', 'width' : '100%' });
+                    li.css({ 'display' : 'table-cell', 'float' : 'none' });
+                }
+            }
+        
+        }); // @end of return this.each()
+
+    };
+    
+    $.fn.horizontalNav.defaults = {
+        responsive : true,
+        responsiveDelay : 100,
+        tableDisplay : true
+    };
+    
+})(jQuery);

vendor/assets/javascripts/jquery.vAlign.js

@@ -0,0 +1,11 @@
+(function ($) {
+  // VERTICALLY ALIGN FUNCTION
+  $.fn.vAlign = function() {
+    return this.each(function(i){
+    var ah = $(this).height();
+    var ph = $(this).parent().height();
+    var mh = Math.ceil((ph-ah) / 2);
+    $(this).css('margin-top', mh);
+    });
+  };
+})(jQuery);

vendor/assets/javascripts/spin.js

@@ -0,0 +1,319 @@
+//fgnass.github.com/spin.js#v1.2.6
+!function(window, document, undefined) {
+
+  /**
+   * Copyright (c) 2011 Felix Gnass [fgnass at neteye dot de]
+   * Licensed under the MIT license
+   */
+
+  var prefixes = ['webkit', 'Moz', 'ms', 'O'] /* Vendor prefixes */
+    , animations = {} /* Animation rules keyed by their name */
+    , useCssAnimations
+
+  /**
+   * Utility function to create elements. If no tag name is given,
+   * a DIV is created. Optionally properties can be passed.
+   */
+  function createEl(tag, prop) {
+    var el = document.createElement(tag || 'div')
+      , n
+
+    for(n in prop) el[n] = prop[n]
+    return el
+  }
+
+  /**
+   * Appends children and returns the parent.
+   */
+  function ins(parent /* child1, child2, ...*/) {
+    for (var i=1, n=arguments.length; i<n; i++)
+      parent.appendChild(arguments[i])
+
+    return parent
+  }
+
+  /**
+   * Insert a new stylesheet to hold the @keyframe or VML rules.
+   */
+  var sheet = function() {
+    var el = createEl('style', {type : 'text/css'})
+    ins(document.getElementsByTagName('head')[0], el)
+    return el.sheet || el.styleSheet
+  }()
+
+  /**
+   * Creates an opacity keyframe animation rule and returns its name.
+   * Since most mobile Webkits have timing issues with animation-delay,
+   * we create separate rules for each line/segment.
+   */
+  function addAnimation(alpha, trail, i, lines) {
+    var name = ['opacity', trail, ~~(alpha*100), i, lines].join('-')
+      , start = 0.01 + i/lines*100
+      , z = Math.max(1 - (1-alpha) / trail * (100-start), alpha)
+      , prefix = useCssAnimations.substring(0, useCssAnimations.indexOf('Animation')).toLowerCase()
+      , pre = prefix && '-'+prefix+'-' || ''
+
+    if (!animations[name]) {
+      sheet.insertRule(
+        '@' + pre + 'keyframes ' + name + '{' +
+        '0%{opacity:' + z + '}' +
+        start + '%{opacity:' + alpha + '}' +
+        (start+0.01) + '%{opacity:1}' +
+        (start+trail) % 100 + '%{opacity:' + alpha + '}' +
+        '100%{opacity:' + z + '}' +
+        '}', sheet.cssRules.length)
+
+      animations[name] = 1
+    }
+    return name
+  }
+
+  /**
+   * Tries various vendor prefixes and returns the first supported property.
+   **/
+  function vendor(el, prop) {
+    var s = el.style
+      , pp
+      , i
+
+    if(s[prop] !== undefined) return prop
+    prop = prop.charAt(0).toUpperCase() + prop.slice(1)
+    for(i=0; i<prefixes.length; i++) {
+      pp = prefixes[i]+prop
+      if(s[pp] !== undefined) return pp
+    }
+  }
+
+  /**
+   * Sets multiple style properties at once.
+   */
+  function css(el, prop) {
+    for (var n in prop)
+      el.style[vendor(el, n)||n] = prop[n]
+
+    return el
+  }
+
+  /**
+   * Fills in default values.
+   */
+  function merge(obj) {
+    for (var i=1; i < arguments.length; i++) {
+      var def = arguments[i]
+      for (var n in def)
+        if (obj[n] === undefined) obj[n] = def[n]
+    }
+    return obj
+  }
+
+  /**
+   * Returns the absolute page-offset of the given element.
+   */
+  function pos(el) {
+    var o = { x:el.offsetLeft, y:el.offsetTop }
+    while((el = el.offsetParent))
+      o.x+=el.offsetLeft, o.y+=el.offsetTop
+
+    return o
+  }
+
+  var defaults = {
+    lines: 12,            // The number of lines to draw
+    length: 7,            // The length of each line
+    width: 5,             // The line thickness
+    radius: 10,           // The radius of the inner circle
+    rotate: 0,            // Rotation offset
+    corners: 1,           // Roundness (0..1)
+    color: '#000',        // #rgb or #rrggbb
+    speed: 1,             // Rounds per second
+    trail: 100,           // Afterglow percentage
+    opacity: 1/4,         // Opacity of the lines
+    fps: 20,              // Frames per second when using setTimeout()
+    zIndex: 2e9,          // Use a high z-index by default
+    className: 'spinner', // CSS class to assign to the element
+    top: 'auto',          // center vertically
+    left: 'auto'          // center horizontally
+  }
+
+  /** The constructor */
+  var Spinner = function Spinner(o) {
+    if (!this.spin) return new Spinner(o)
+    this.opts = merge(o || {}, Spinner.defaults, defaults)
+  }
+
+  Spinner.defaults = {}
+
+  merge(Spinner.prototype, {
+    spin: function(target) {
+      this.stop()
+      var self = this
+        , o = self.opts
+        , el = self.el = css(createEl(0, {className: o.className}), {position: 'relative', width: 0, zIndex: o.zIndex})
+        , mid = o.radius+o.length+o.width
+        , ep // element position
+        , tp // target position
+
+      if (target) {
+        target.insertBefore(el, target.firstChild||null)
+        tp = pos(target)
+        ep = pos(el)
+        css(el, {
+          left: (o.left == 'auto' ? tp.x-ep.x + (target.offsetWidth >> 1) : parseInt(o.left, 10) + mid) + 'px',
+          top: (o.top == 'auto' ? tp.y-ep.y + (target.offsetHeight >> 1) : parseInt(o.top, 10) + mid)  + 'px'
+        })
+      }
+
+      el.setAttribute('aria-role', 'progressbar')
+      self.lines(el, self.opts)
+
+      if (!useCssAnimations) {
+        // No CSS animation support, use setTimeout() instead
+        var i = 0
+          , fps = o.fps
+          , f = fps/o.speed
+          , ostep = (1-o.opacity) / (f*o.trail / 100)
+          , astep = f/o.lines
+
+        ;(function anim() {
+          i++;
+          for (var s=o.lines; s; s--) {
+            var alpha = Math.max(1-(i+s*astep)%f * ostep, o.opacity)
+            self.opacity(el, o.lines-s, alpha, o)
+          }
+          self.timeout = self.el && setTimeout(anim, ~~(1000/fps))
+        })()
+      }
+      return self
+    },
+
+    stop: function() {
+      var el = this.el
+      if (el) {
+        clearTimeout(this.timeout)
+        if (el.parentNode) el.parentNode.removeChild(el)
+        this.el = undefined
+      }
+      return this
+    },
+
+    lines: function(el, o) {
+      var i = 0
+        , seg
+
+      function fill(color, shadow) {
+        return css(createEl(), {
+          position: 'absolute',
+          width: (o.length+o.width) + 'px',
+          height: o.width + 'px',
+          background: color,
+          boxShadow: shadow,
+          transformOrigin: 'left',
+          transform: 'rotate(' + ~~(360/o.lines*i+o.rotate) + 'deg) translate(' + o.radius+'px' +',0)',
+          borderRadius: (o.corners * o.width>>1) + 'px'
+        })
+      }
+
+      for (; i < o.lines; i++) {
+        seg = css(createEl(), {
+          position: 'absolute',
+          top: 1+~(o.width/2) + 'px',
+          transform: o.hwaccel ? 'translate3d(0,0,0)' : '',
+          opacity: o.opacity,
+          animation: useCssAnimations && addAnimation(o.opacity, o.trail, i, o.lines) + ' ' + 1/o.speed + 's linear infinite'
+        })
+
+        if (o.shadow) ins(seg, css(fill('#000', '0 0 4px ' + '#000'), {top: 2+'px'}))
+
+        ins(el, ins(seg, fill(o.color, '0 0 1px rgba(0,0,0,.1)')))
+      }
+      return el
+    },
+
+    opacity: function(el, i, val) {
+      if (i < el.childNodes.length) el.childNodes[i].style.opacity = val
+    }
+
+  })
+
+  /////////////////////////////////////////////////////////////////////////
+  // VML rendering for IE
+  /////////////////////////////////////////////////////////////////////////
+
+  /**
+   * Check and init VML support
+   */
+  ;(function() {
+
+    function vml(tag, attr) {
+      return createEl('<' + tag + ' xmlns="urn:schemas-microsoft.com:vml" class="spin-vml">', attr)
+    }
+
+    var s = css(createEl('group'), {behavior: 'url(#default#VML)'})
+
+    if (!vendor(s, 'transform') && s.adj) {
+
+      // VML support detected. Insert CSS rule ...
+      sheet.addRule('.spin-vml', 'behavior:url(#default#VML)')
+
+      Spinner.prototype.lines = function(el, o) {
+        var r = o.length+o.width
+          , s = 2*r
+
+        function grp() {
+          return css(
+            vml('group', {
+              coordsize: s + ' ' + s,
+              coordorigin: -r + ' ' + -r
+            }),
+            { width: s, height: s }
+          )
+        }
+
+        var margin = -(o.width+o.length)*2 + 'px'
+          , g = css(grp(), {position: 'absolute', top: margin, left: margin})
+          , i
+
+        function seg(i, dx, filter) {
+          ins(g,
+            ins(css(grp(), {rotation: 360 / o.lines * i + 'deg', left: ~~dx}),
+              ins(css(vml('roundrect', {arcsize: o.corners}), {
+                  width: r,
+                  height: o.width,
+                  left: o.radius,
+                  top: -o.width>>1,
+                  filter: filter
+                }),
+                vml('fill', {color: o.color, opacity: o.opacity}),
+                vml('stroke', {opacity: 0}) // transparent stroke to fix color bleeding upon opacity change
+              )
+            )
+          )
+        }
+
+        if (o.shadow)
+          for (i = 1; i <= o.lines; i++)
+            seg(i, -2, 'progid:DXImageTransform.Microsoft.Blur(pixelradius=2,makeshadow=1,shadowopacity=.3)')
+
+        for (i = 1; i <= o.lines; i++) seg(i)
+        return ins(el, g)
+      }
+
+      Spinner.prototype.opacity = function(el, i, val, o) {
+        var c = el.firstChild
+        o = o.shadow && o.lines || 0
+        if (c && i+o < c.childNodes.length) {
+          c = c.childNodes[i+o]; c = c && c.firstChild; c = c && c.firstChild
+          if (c) c.opacity = val
+        }
+      }
+    }
+    else
+      useCssAnimations = vendor(s, 'animation')
+  })()
+
+  if (typeof define == 'function' && define.amd)
+    define(function() { return Spinner })
+  else
+    window.Spinner = Spinner
+
+}(window, document)