src/ShadowPool.js

   1 /**
   2  * @class Ext.ShadowPool
   3  * @extends Object
   4  * Private utility class that manages the internal Shadow cache
   5  * @private
   6  */
   7 Ext.define('Ext.ShadowPool', {
   8     singleton: true,
   9     requires: ['Ext.core.DomHelper'],
  10
  11     markup: function() {
  12         if (Ext.supports.CSS3BoxShadow) {
  13             return '<div class="' + Ext.baseCSSPrefix + 'css-shadow" role="presentation"></div>';
  14         } else if (Ext.isIE) {
  15             return '<div class="' + Ext.baseCSSPrefix + 'ie-shadow" role="presentation"></div>';
  16         } else {
  17             return '<div class="' + Ext.baseCSSPrefix + 'frame-shadow" role="presentation">' +
  18                 '<div class="xst" role="presentation">' +
  19                     '<div class="xstl" role="presentation"></div>' +
  20                     '<div class="xstc" role="presentation"></div>' +
  21                     '<div class="xstr" role="presentation"></div>' +
  22                 '</div>' +
  23                 '<div class="xsc" role="presentation">' +
  24                     '<div class="xsml" role="presentation"></div>' +
  25                     '<div class="xsmc" role="presentation"></div>' +
  26                     '<div class="xsmr" role="presentation"></div>' +
  27                 '</div>' +
  28                 '<div class="xsb" role="presentation">' +
  29                     '<div class="xsbl" role="presentation"></div>' +
  30                     '<div class="xsbc" role="presentation"></div>' +
  31                     '<div class="xsbr" role="presentation"></div>' +
  32                 '</div>' +
  33             '</div>';
  34         }
  35     }(),
  36
  37     shadows: [],
  38
  39     pull: function() {
  40         var sh = this.shadows.shift();
  41         if (!sh) {
  42             sh = Ext.get(Ext.core.DomHelper.insertHtml("beforeBegin", document.body.firstChild, this.markup));
  43             sh.autoBoxAdjust = false;
  44         }
  45         return sh;
  46     },
  47
  48     push: function(sh) {
  49         this.shadows.push(sh);
  50     },
  51
  52     reset: function() {
  53         Ext.Array.each(this.shadows, function(shadow) {
  54             shadow.remove();
  55         });
  56         this.shadows = [];
  57     }
  58 });