    /**
     * @class Ext.layout.container.Auto
     *
     * The AutoLayout is the default layout manager delegated by {@link Ext.container.Container} to
     * render any child Components when no `{@link Ext.container.Container#layout layout}` is configured into
     * a `{@link Ext.container.Container Container}.` AutoLayout provides only a passthrough of any layout calls
     * to any child containers.
     *
     *     @example
     *     Ext.create('Ext.Panel', {
     *         width: 500,
     *         height: 280,
     *         title: "AutoLayout Panel",
     *         layout: 'auto',
     *         renderTo: document.body,
     *         items: [{
     *             xtype: 'panel',
     *             title: 'Top Inner Panel',
     *             width: '75%',
     *             height: 90
     *         },
     *         {
     *             xtype: 'panel',
     *             title: 'Bottom Inner Panel',
     *             width: '75%',
     *             height: 90
     *         }]
     *     });
     */
    Ext.define('Ext.layout.container.Auto', {

        /* Begin Definitions */

        alias: ['layout.auto', 'layout.autocontainer'],

        extend: 'Ext.layout.container.Container',

        /* End Definitions */

        type: 'autocontainer',

        childEls: [
            'outerCt',
            'innerCt',
            'clearEl'
        ],

        /**
         * @cfg {Boolean} [reserveScrollbar=false]
         * Set to `true` to leave space for a vertical scrollbar (if the OS shows space-consuming scrollbars) regardless
         * of whether a scrollbar is needed.
         *
         * This is useful if content height changes during application usage, but you do not want the calculated width
         * of child items to change when a scrollbar appears or disappears. The scrollbar will appear in the reserved space,
         * and the calculated width of child Components will not change.
         *
         *     @example
         *     Ext.define('Employee', {
         *         extend: 'Ext.data.Model',
         *         fields: [
         *            {name: 'rating', type: 'int'},
         *            {name: 'salary', type: 'float'},
         *            {name: 'name'}
         *         ]
         *     });
         *
         *     function createFakeData(count) {
         *         var firstNames   = ['Ed', 'Tommy', 'Aaron', 'Abe', 'Jamie', 'Adam', 'Dave', 'David', 'Jay', 'Nicolas', 'Nige'],
         *             lastNames    = ['Spencer', 'Maintz', 'Conran', 'Elias', 'Avins', 'Mishcon', 'Kaneda', 'Davis', 'Robinson', 'Ferrero', 'White'],
         *             ratings      = [1, 2, 3, 4, 5],
         *             salaries     = [100, 400, 900, 1500, 1000000];
         *
         *         var data = [];
         *         for (var i = 0; i < (count || 25); i++) {
         *             var ratingId    = Math.floor(Math.random() * ratings.length),
         *                 salaryId    = Math.floor(Math.random() * salaries.length),
         *                 firstNameId = Math.floor(Math.random() * firstNames.length),
         *                 lastNameId  = Math.floor(Math.random() * lastNames.length),
         *
         *                 rating      = ratings[ratingId],
         *                 salary      = salaries[salaryId],
         *                 name        = Ext.String.format("{0} {1}", firstNames[firstNameId], lastNames[lastNameId]);
         *
         *             data.push({
         *                 rating: rating,
         *                 salary: salary,
         *                 name: name
         *             });
         *         }
         *         store.loadData(data);
         *     }
         *
         *     // create the Data Store
         *     var store = Ext.create('Ext.data.Store', {
         *         id: 'store',
         *         model: 'Employee',
         *         proxy: {
         *             type: 'memory'
         *         }
         *     });
         *     createFakeData(10);
         *
         *     var grid = Ext.create('Ext.grid.Panel', {
         *         title: 'Grid loaded with varying number of records',
         *         anchor: '100%',
         *         store: store,
         *         columns: [{
         *             xtype: 'rownumberer',
         *             width: 40,
         *             sortable: false
         *         },{
         *             text: 'Name',
         *             flex: 1,
         *             sortable: true,
         *             dataIndex: 'name'
         *         },{
         *             text: 'Rating',
         *             width: 125,
         *             sortable: true,
         *             dataIndex: 'rating'
         *         },{
         *             text: 'Salary',
         *             width: 125,
         *             sortable: true,
         *             dataIndex: 'salary',
         *             align: 'right',
         *             renderer: Ext.util.Format.usMoney
         *         }]
         *     });
         *
         *     Ext.create('Ext.panel.Panel', {
         *         renderTo: document.body,
         *         width: 800,
         *         height: 600,
         *         layout: {
         *             type: 'anchor',
         *             reserveScrollbar: true // There will be a gap even when there's no scrollbar
         *         },
         *         autoScroll: true,
         *         items: grid,
         *         tbar: {
         *             defaults: {
         *                 handler: function(b) {
         *                     createFakeData(b.count);
         *                 }
         *             },
         *             items: [{
         *                  text: '10 Items',
         *                  count: 10
         *             },{
         *                  text: '100 Items',
         *                  count: 100
         *             },{
         *                  text: '300 Items',
         *                  count: 300
         *             },{
         *                  text: '1000 Items',
         *                  count: 1000
         *             },{
         *                  text: '5000 Items',
         *                  count: 5000
         *             }]
         *         }
         *     });
         *
         */
        reserveScrollbar: false,

        /**
         * @property {Boolean} [managePadding=true]
         * indicates that this layout will correct cross browser padding differences when the
         * container has overflow.
         *
         * In some browsers the right and/or bottom padding of a container is lost when
         * the container has overflow.  If managePadding is true the layout will apply the
         * padding to an inner wrapping element instead of the container element that has the
         * overflow so that paddding will be included in the scrollable area.
         * Note: padding will not be managed if it is configured on the container using
         * a style config or css class.  In order to be managed, padding must be added to the
         * container using the appropriate {@link Ext.AbstractComponent#contentPaddingProperty
         * contentPaddingProperty}.  For {@link Ext.panel.Panel Panels} use
         * {@link Ext.panel.AbstractPanel#bodyPadding}, and for
         * {@link Ext.container.Container Containers}, use
         * {@link Ext.AbstractComponent#padding padding}
         */
        managePadding: true,

        /**
         * @property {Boolean} [manageOverflow=false]
         * true to rerun the layout if scrollbars are needed.
         */
        manageOverflow: false,

        // Begin with no previous adjustments
        lastOverflowAdjust: {
            width: 0,
            height: 0
        },

        // Auto layout's renderTpl wraps the content in an outerCt which is used to accomplish
        // the following 3 goals:
        //
        // 1. When the container has a shrink wrapped width and/or height, the outerCt is used
        // to measure the size of the content.
        // 2. When the container has overflow some browsers lose the container's right and/or
        // bottom padding.  To fix this, the padding is rendered to the outerCt instead of
        // the container target element.  This ensures that the padding is included in the
        // container's scrollWidth/scrollHeight. In Old IE when a table is used, the padding
        // is rendered to the innerCt td element.
        // 3. The outerCt contains the margins of its children, that is to say, it prevents
        // them from collapsing.
        renderTpl: [
            '{% if (!(Ext.isIEQuirks || Ext.isIE7m)) { %}',
                // All browsers that support display:table use this template.
                // An outerCt with display:table shrink-wraps contents, and contains child
                // margins. The table-cell innerCt is required in order to support percentage
                // heights on child elements. Originally the outerCt started out as a div, but
                // was changed to a span to work around an obscure firefox 3.6 bug where
                // placing a Container inside of a fieldset's legend element causes the legend
                // to blow up if the outerCt is a div.
                '<span id="{ownerId}-outerCt" style="display:table;" role="presentation">',
                    // height:100% is required on the innerCt in order for percentage-height
                    // children to work in IE, firefox, and opera
                    '<div id="{ownerId}-innerCt" style="display:table-cell;height:100%;',
                    'vertical-align:top;{%this.renderPadding(out, values)%}" class="{innerCtCls}" role="presentation">',
                        '{%this.renderBody(out,values)%}',
                    '</div>',
                '</span>',
            '{% } else if (values.shrinkWrapWidth) { %}',
                // If the containers width is shrink wrapped a table-based outerCt/innerCt
                // is required in old IE.  See getRenderData() for more details on the criteria
                // used to determine if the container has shrink wrapped width.
                '<table id="{ownerId}-outerCt" class="' + Ext.plainTableCls + '" role="presentation">',
                    '<tbody role="presentation">',
                        '<tr role="presentation">',
                            '<td id="{ownerId}-innerCt" style="vertical-align:top;padding:0;',
                                '{%this.renderPadding(out, values)%}" class="{innerCtCls}" role="presentation">',
                                '{%this.renderBody(out,values)%}',
                                 // clear element to contain the bottom margin of floated last child item
                                '<div id="{ownerId}-clearEl" class="', Ext.baseCSSPrefix,  'clear"',
                                    'role="presentation"></div>',
                            '</td>',
                        '</tr>',
                    '</tbody>',
                '</table>',
            '{% } else { %}',
                // If the container's width is not shrink wrapped, old IE can get by with
                // divs as the outerCt/innerCt.  zoom:1 is required to contain the margins
                // of children. The padding is placed on the outerCt instead of the innerCt.
                // This is to because if the padding was placed on the innerCt, the top
                // margin of the first child item would collapse into the top padding of
                // the innerCt.
                '<div id="{ownerId}-outerCt" style="zoom:1;{%this.renderPadding(out, values)%}" role="presentation">',
                    '<div id="{ownerId}-innerCt" style="zoom:1;height:100%;" class="{innerCtCls}" role="presentation">',
                        '{%this.renderBody(out,values)%}',
                         // clear element to contain the bottom margin of floated last child item
                        '<div id="{ownerId}-clearEl" class="', Ext.baseCSSPrefix,  'clear"',
                            'role="presentation"></div>',
                    '</div>',
                '</div>',
                // set a flag that indicates we are not using a "shrink wrap" template
                '{% values.$layout.isShrinkWrapTpl = false %}',
            '{% } %}'
        ],

        // This template is used for dynamically inserting a table outerCt/innerCt when needed.
        // It should be identical to the table template defined in renderTpl except that it
        // does not have renderBody or clearEl.  It is an empty shell so that the contents
        // of an already existing innerCt can be moved into it.
        tableTpl: [
            '<table id="{ownerId}-outerCt" class="' + Ext.plainTableCls + '" role="presentation">',
                '<tbody role="presentation">',
                    '<tr role="presentation">',
                        '<td id="{ownerId}-innerCt" style="vertical-align:top;padding:0;',
                            '{%this.renderPadding(out, values)%}" class="{innerCtCls}" role="presentation">',
                        '</td>',
                    '</tr>',
                '</tbody>',
            '</table>'
        ],

        isShrinkWrapTpl: true,

        beginLayout: function(ownerContext) {
            var me = this,
                bottomPadding, overflowYStyle, overflowXStyle, needsTable;

            me.callParent(arguments);

            me.initContextItems(ownerContext);

            if (!me.isShrinkWrapTpl) {
                // In most cases the determination to use a table based template is made at
                // render time; however, if the initial determination was incorrect, we may
                // need to dynamically replace the existing outerCt/innerCt with a table
                // (see insertTableCt)
                if (ownerContext.widthModel.shrinkWrap) {
                    needsTable = true;
                }

                // in IE7 strict right padding is lost when there is horizontal overflow
                // unless the outerCt is a table.
                if (Ext.isStrict && Ext.isIE7) {
                    overflowXStyle = me.getOverflowXStyle(ownerContext);
                    if ((overflowXStyle === 'auto' || overflowXStyle === 'scroll') &&
                        ownerContext.paddingContext.getPaddingInfo().right) {
                        needsTable = true;
                    }
                }

                if (needsTable) {
                    me.insertTableCt(ownerContext);
                }
            }

            // When using the non-table renderTpl IE7 strict loses bottom padding if there
            // is vertical overflow. To adjust for the loss of padding, we add the bottom
            // padding to the height of the clearEl
            if (!me.isShrinkWrapTpl && Ext.isIE7 && Ext.isStrict && !me.clearElHasPadding) {
                 bottomPadding = ownerContext.paddingContext.getPaddingInfo().bottom;
                 overflowYStyle = me.getOverflowYStyle(ownerContext);
                 if (bottomPadding && (overflowYStyle === 'auto' || overflowYStyle === 'scroll')) {
                     me.clearEl.setStyle('height', bottomPadding);
                     me.clearElHasPadding = true;
                 }
            }
        },

        beforeLayoutCycle: function(ownerContext){
            var comp = this.owner,
                hierarchyState = comp.hierarchyState,
                hierarchyStateInner = comp.hierarchyStateInner;

            if (!hierarchyState || hierarchyState.invalid) {
                hierarchyState = comp.getHierarchyState(); // fixes both
                hierarchyStateInner = comp.hierarchyStateInner;
            }
            if (ownerContext.widthModel.shrinkWrap && this.isShrinkWrapTpl) {
                hierarchyStateInner.inShrinkWrapTable = true;
            } else {
                delete hierarchyStateInner.inShrinkWrapTable;
            }
        },

        beginLayoutCycle: function(ownerContext) {
            var me = this,
                outerCt = me.outerCt,
                lastOuterCtWidth = me.lastOuterCtWidth || '',
                lastOuterCtHeight = me.lastOuterCtHeight || '',
                lastOuterCtTableLayout = me.lastOuterCtTableLayout || '',
                state = ownerContext.state,
                overflowXStyle, overflowYStyle, outerCtWidth, outerCtHeight, outerCtTableLayout,
                deferWidth, hierarchyStateInner;

            me.callParent(arguments);

            // Default to "shrink wrap styles".
            outerCtWidth = outerCtHeight = outerCtTableLayout = '';

            if (!ownerContext.widthModel.shrinkWrap && me.isShrinkWrapTpl) {
                // if we're not shrink wrapping width, but we're using a shrink wrap template
                // we need to get the innerCt out of the way to avoid any shrink wrapping
                // effect on child items
                if (Ext.isIE7m && Ext.isStrict) {
                    overflowYStyle = me.getOverflowYStyle(ownerContext);
                    if (overflowYStyle === 'auto' || overflowYStyle === 'scroll') {
                        // IE6/7 strict will have the outerCt's width set by setCtSizeIfNeeded()
                        // when the container has potential vertical overflow, so there is
                        // no need to set the outerCt's width to 100% here
                        deferWidth = true;
                    }
                }

                if (!deferWidth) {
                    // fill the available width within the container
                    outerCtWidth = '100%';
                }
                hierarchyStateInner = me.owner.hierarchyStateInner;
                // expand no further than the available width, even if contents are wider
                // unless there is a potential for horizontal overflow, then allow
                // the outerCt to expand to the width of the contents
                overflowXStyle = me.getOverflowXStyle(ownerContext);
                outerCtTableLayout = (hierarchyStateInner.inShrinkWrapTable ||
                                      overflowXStyle === 'auto' ||
                                      overflowXStyle === 'scroll') ? '' : 'fixed';
            }

            if (!ownerContext.heightModel.shrinkWrap &&
                !Ext.supports.PercentageHeightOverflowBug) {
                // if we're not shrink wrapping height, we need to get the outerCt out of the
                // way so that percentage height children will be sized correctly.  We do this
                // by giving the outerCt a height of '100%' unless the browser is affected by
                // the "percentage height overflow bug", in which case the outerCt will get a
                // pixel height set during the calculate phase after we know the targetEl size.
                outerCtHeight = '100%';
            }

            // if the outerCt width changed since last time (becuase of a widthModel change)
            // or if we set a pixel width on the outerCt last time to work around a browser-
            // specific bug, we need to set the width of the outerCt
            if ((outerCtWidth !== lastOuterCtWidth) || me.hasOuterCtPxWidth) {
                outerCt.setStyle('width', outerCtWidth);
                me.lastOuterCtWidth = outerCtWidth;
                me.hasOuterCtPxWidth = false;
            }

            // Set the outerCt table-layout property if different from last time.
            if (outerCtTableLayout !== lastOuterCtTableLayout) {
                outerCt.setStyle('table-layout', outerCtTableLayout);
                me.lastOuterCtTableLayout = outerCtTableLayout;
            }

            // if the outerCt height changed since last time (becuase of a heightModel change)
            // or if we set a pixel height on the outerCt last time to work around a browser-
            // specific bug, we need to set the height of the outerCt
            if ((outerCtHeight !== lastOuterCtHeight) || me.hasOuterCtPxHeight) {
                outerCt.setStyle('height', outerCtHeight);
                me.lastOuterCtHeight = outerCtHeight;
                me.hasOuterCtPxHeight = false;
            }

            if (me.hasInnerCtPxHeight) {
                me.innerCt.setStyle('height', '');
                me.hasInnerCtPxHeight = false;
            }

            // Begin with the scrollbar adjustment that we used last time - this is more likely
            // to be correct than beginning with no adjustment at all, but only if it is not
            // already defined - it may have already been set by invalidate()
            state.overflowAdjust = state.overflowAdjust || me.lastOverflowAdjust;
        },

        calculate: function(ownerContext) {
            var me = this,
                state = ownerContext.state,
                containerSize = me.getContainerSize(ownerContext, true),
                // If subclass has a calculateItems method, call it and cache the result
                calculatedItems = state.calculatedItems ||
                    (state.calculatedItems = me.calculateItems ?
                    me.calculateItems(ownerContext, containerSize) : true);

            me.setCtSizeIfNeeded(ownerContext, containerSize);

            if (calculatedItems && ownerContext.hasDomProp('containerChildrenSizeDone')) {

                me.calculateContentSize(ownerContext);

                if (containerSize.gotAll) {
                    if (me.manageOverflow && !ownerContext.state.secondPass && !me.reserveScrollbar) {
                        me.calculateOverflow(ownerContext, containerSize);
                    }
                    return;
                }
            }

            me.done = false;
        },

        calculateContentSize: function (ownerContext) {
            var me = this,
                containerDimensions = ((ownerContext.widthModel.shrinkWrap ? 1 : 0) |
                                       (ownerContext.heightModel.shrinkWrap ? 2 : 0)),
                calcWidth = (containerDimensions & 1) || undefined,
                calcHeight = (containerDimensions & 2) || undefined,
                needed = 0,
                props = ownerContext.props;

            if (calcWidth) {
                if (isNaN(props.contentWidth)) {
                    ++needed;
                } else {
                    calcWidth = undefined;
                }
            }
            if (calcHeight) {
                if (isNaN(props.contentHeight)) {
                    ++needed;
                } else {
                    calcHeight = undefined;
                }
            }

            if (needed) {
                if (calcWidth && !ownerContext.setContentWidth(me.measureContentWidth(ownerContext))) {
                    me.done = false;
                }
                if (calcHeight && !ownerContext.setContentHeight(me.measureContentHeight(ownerContext))) {
                    me.done = false;
                }

                //if (me.done) {
                //    var el = ownerContext.targetContext.el.dom;
                //    Ext.log(this.owner.id, '.contentSize: ', contentWidth, 'x', contentHeight,
                //        ' => scrollSize: ', el.scrollWidth, 'x', el.scrollHeight);
                //}
            }
        },

        /**
         * Handles overflow processing for a container.  In addition to the ownerContext
         * passed to the {@link #calculate} method, this method also needs the containerSize
         * (the object returned by {@link #getContainerSize}).
         * @protected
         *
         * @param {Ext.layout.ContextItem} ownerContext
         */
        calculateOverflow: function (ownerContext) {
            var me = this,
                width, height, scrollbarSize, scrollbars, xauto, yauto, targetEl;

            // Determine the dimensions that have overflow:auto applied. If these come by
            // way of component config, this does not require a DOM read:
            xauto = (me.getOverflowXStyle(ownerContext) === 'auto');
            yauto = (me.getOverflowYStyle(ownerContext) === 'auto');

            if (xauto || yauto) {
                scrollbarSize = Ext.getScrollbarSize();
                targetEl = ownerContext.overflowContext.el.dom;
                scrollbars = 0;

                if (targetEl.scrollWidth > targetEl.clientWidth) {
                    // has horizontal scrollbar
                    scrollbars |= 1;
                }

                if (targetEl.scrollHeight > targetEl.clientHeight) {
                    // has vertical scrollbar
                    scrollbars |= 2;
                }

                width = (yauto && (scrollbars & 2)) ? scrollbarSize.width : 0;
                height = (xauto && (scrollbars & 1)) ? scrollbarSize.height : 0;

                if (width !== me.lastOverflowAdjust.width || height !== me.lastOverflowAdjust.height) {
                    me.done = false;

                    // we pass overflowAdjust and overflowState in as state for the next
                    // cycle (these are discarded if one of our ownerCt's invalidates):
                    ownerContext.invalidate({
                        state: {
                            overflowAdjust: {
                                width: width,
                                height: height
                            },
                            overflowState: scrollbars,
                            secondPass: true
                        }
                    });
                }
            }
        },

        completeLayout: function(ownerContext) {
           this.lastOverflowAdjust = ownerContext.state.overflowAdjust;
        },

        doRenderPadding: function(out, renderData) {
            // Careful! This method is bolted on to the renderTpl so all we get for context is
            // the renderData! The "this" pointer is the renderTpl instance!

            var me = renderData.$layout,
                owner = renderData.$layout.owner,
                padding = owner[owner.contentPaddingProperty];

            if (me.managePadding && padding) {
                out.push('padding:', owner.unitizeBox(padding));
            }
        },

        finishedLayout: function (ownerContext) {
            var innerCt = this.innerCt;

            this.callParent(arguments);

            if (Ext.isIEQuirks || Ext.isIE8m)  {
                // IE6/7/quirks need a repaint to fix various rendering issues. TODO: narrow
                // down the specific issues that require a repaint.
                // IE8 strict needs a repaint to render percentage sized child items.
                innerCt.repaint();
            }

            if (Ext.isOpera) {
                // Opera also needs a repaint to render percentage sized child items. but
                // the normal repaint() method doesn't seem to do the trick, but tweaking
                // the position property in combination with reading scrollWidth does.
                innerCt.setStyle('position', 'relative');
                innerCt.dom.scrollWidth;
                innerCt.setStyle('position', '');
            }
        },

        /**
         * Returns the container size (that of the target). Only the fixed-sized dimensions can
         * be returned because the shrinkWrap dimensions are based on the contentWidth/Height
         * as determined by the container layout.
         *
         * If the {@link #calculateOverflow} method is used and if {@link #manageOverflow} is
         * true, this will adjust the width/height by the size of scrollbars.
         *
         * @param {Ext.layout.ContextItem} ownerContext The owner's context item.
         * @param {Boolean} [inDom=false] True if the container size must be in the DOM.
         * @return {Object} The size
         * @return {Number} return.width The width
         * @return {Number} return.height The height
         * @protected
         */
        getContainerSize : function(ownerContext, inDom) {
            // Subtle But Important:
            //
            // We don't want to call getProp/hasProp et.al. unless we in fact need that value
            // for our results! If we call it and don't need it, the layout manager will think
            // we depend on it and will schedule us again should it change.

            var size = this.callParent(arguments),
                overflowAdjust = ownerContext.state.overflowAdjust;

            if (overflowAdjust) {
                size.width -= overflowAdjust.width;
                size.height -= overflowAdjust.height;
            }

            return size;
        },

        getRenderData: function() {
            var owner = this.owner,
                data = this.callParent();

            // The shrinkWrapWidth data property is used by the renderTpl to determine if
            // a table-based outerCt/innerCt is required in old IE.  There are currently 2
            // container configs that turn on the table at render time:
            //
            // 1. shrinkWrap:[1/3/true] on the container's initial config.  There
            // are two reasons one would want to use this config:
            //     a) If the container's width is initially shrink wrapped.
            //     b) If the container is not initially shrink wrapped and it is known
            //        at creation time that it will be shrink wrapped at some point
            //        after the initial layout cycle, then it is recommended to
            //        use the shrinkWrap config to initially configure the container
            //        with shrink wrapped width so that the layout does not have to
            //        dynamically insert a table after initial render.
            //
            // 2. If the container's "floating" config is set to true, and the container
            // does not have a configured width, we can be relatively certain at render
            // time that the container will be shrink wrapped at layout time, so
            // we go ahead and initially render using a table.
            if ((Ext.isIEQuirks || Ext.isIE7m) && // old IE
                ((owner.shrinkWrap & 1) || // shrink wrap width (handles value of 1, 3, or true)
                (owner.floating && !owner.width))) { // floating container with no configured width
                data.shrinkWrapWidth = true;
            }

            return data;
        },

        // Overridden method from Ext.layout.container.Container.
        // Used in the beforeLayout method to render all items into.
        getRenderTarget: function() {
            return this.innerCt;
        },

        // Overridden method from Ext.layout.container.Container.
        // Used by Container classes to insert special DOM elements which must exist in addition to the child components
        getElementTarget: function() {
            return this.innerCt;
        },

        /**
         * Returns the overflow-x style of the render target.
         * Note: If overflow is configured on a container using style or css class this method
         * will read the dom the first time it is called. It is therefore preferable for
         * performance reasons to use the autoScroll or overflowX config when horizontal
         * overflow is desired.
         * @protected
         * @param {Ext.layout.ContextItem} ownerContext
         * @return {String}
         */
        getOverflowXStyle: function(ownerContext) {
            return ownerContext.overflowXStyle ||
                (ownerContext.overflowXStyle = this.owner.scrollFlags.overflowX || ownerContext.overflowContext.getStyle('overflow-x'));
        },

        /**
         * Returns the overflow-y style of the render target.
         * Note: If overflow is configured on a container using style or css class this method
         * will read the dom the first time it is called. It is therefore preferable for
         * performance reasons to use the autoScroll or overflowY config when vertical
         * overflow is desired.
         * @protected
         * @param {Ext.layout.ContextItem} ownerContext
         * @return {String}
         */
        getOverflowYStyle: function(ownerContext) {
            return ownerContext.overflowYStyle ||
                (ownerContext.overflowYStyle = this.owner.scrollFlags.overflowY || ownerContext.overflowContext.getStyle('overflow-y'));
        },

        initContextItems: function(ownerContext) {
            var me = this,
                target = ownerContext.target,
                customOverflowEl = me.owner.customOverflowEl;

            ownerContext.outerCtContext = ownerContext.getEl('outerCt', me);
            ownerContext.innerCtContext = ownerContext.getEl('innerCt', me);

            if (customOverflowEl) {
                ownerContext.overflowContext = ownerContext.getEl(customOverflowEl);
            } else {
                ownerContext.overflowContext = ownerContext.targetContext;
            }

            if (target[target.contentPaddingProperty] !== undefined) {
                // If padding was defined using the contentPaddingProperty, we render the
                // the padding to the innerCt or outerCt (depending on the template that is
                // being used), so we need to set the paddingContext accordingly.
                // Otherwise we leave paddingContext as set by Container layout (defaults to
                // the targetContext)
                ownerContext.paddingContext = me.isShrinkWrapTpl ?
                    ownerContext.innerCtContext : ownerContext.outerCtContext;
            }
        },

        initLayout: function() {
            var me = this,
                scrollbarWidth = Ext.getScrollbarSize().width,
                owner = me.owner;

            me.callParent();

            // Create a default lastOverflowAdjust based upon scrolling configuration.
            // If the Container is to overflow, or we *always* reserve space for a scrollbar
            // then reserve space for a vertical scrollbar
            if (scrollbarWidth && me.manageOverflow && !me.hasOwnProperty('lastOverflowAdjust')) {
                if (owner.autoScroll || me.reserveScrollbar) {
                    me.lastOverflowAdjust = {
                        width: scrollbarWidth,
                        height: 0
                    };
                }
            }
        },

        /**
         * In some cases a table-based outerCt/innerCt is required in old IE (see renderTpl).
         * Most of the time this is determined at render time, however its possible that
         * we made the wrong determination at render time and now that the layout is in
         * progress we need a table.  If so, this method should be called to replace the
         * existing outerCt with a new table outerCt, and move the child elements to the new
         * innerCt.
         * @private
         */
        insertTableCt: function(ownerContext) {
            var me = this,
                owner = me.owner,
                i = 0,
                renderTpl, fragment, childNodes, childLength, targetEl;

            // get the table-based renderTpl
            renderTpl = Ext.XTemplate.getTpl(this, 'tableTpl');
            renderTpl.renderPadding = me.doRenderPadding;

            // To avoid unnecessary reflows, remove the innerCt from the dom
            // before operating on its children.
            me.outerCt.dom.removeChild(me.innerCt.dom);
            // create a document fragment to move all the childNodes to, so that
            // they can be batch appended to the new innerCt
            fragment = document.createDocumentFragment();
            childNodes = me.innerCt.dom.childNodes;
            childLength = childNodes.length;
            // append all the children to the document fragment
            for (; i < childLength; i++) {
                fragment.appendChild(childNodes[0]);
            }
            // process the table template and insert it into the target el
            targetEl = me.getTarget();
            targetEl.dom.innerHTML = renderTpl.apply({
                $layout: me,
                ownerId: me.owner.id
            });

            // append the document fragment containing the childNodes to the new innerCt
            targetEl.down('td').dom.appendChild(fragment);
            // reconfigure childEls to point to the new template's elements
            // we need to do this after the childNodes are appended to the new innerCt
            // because the clearEl is one of the childNodes
            me.applyChildEls(owner.el, owner.id)
            // set the flag that indicates we are using a "shrink wrap" template.
            // this needs to be done before reinitializeing the context items so that
            // the paddingContext will be configured correctly.
            me.isShrinkWrapTpl = true;
            // since we have new childEls we need to reinitialize the context items
            ownerContext.removeEl(me.outerCt);
            ownerContext.removeEl(me.innerCt);
            me.initContextItems(ownerContext);
        },

        measureContentHeight: function (ownerContext) {
            // contentHeight includes padding, but not border, framing or margins
            var contentHeight = this.outerCt.getHeight(),
                target = ownerContext.target;

            if (this.managePadding && (target[target.contentPaddingProperty] === undefined)) {
                // if padding was not configured using the appropriate contentPaddingProperty
                // then the padding will not be on the paddingContext, and therfore not included
                // in the outerCt measurement, so we need to read the padding from the
                // targetContext
                contentHeight += ownerContext.targetContext.getPaddingInfo().height;
            }
            return contentHeight;
        },

        measureContentWidth: function (ownerContext) {
            var dom, style, old, contentWidth, target;

            // In the newer Chrome versions, it won't measure the
            // width correctly without repainting the inner
            // cell in some circumstances.
            if (this.chromeCellMeasureBug) {
                dom = this.innerCt.dom;
                style = dom.style;
                old = style.display;

                if (old == 'table-cell') {
                    style.display = '';
                    dom.offsetWidth;
                    style.display = old;
                }
            }

            // contentWidth includes padding, but not border, framing or margins
            contentWidth = this.outerCt.getWidth();
            target = ownerContext.target;

            if (this.managePadding && (target[target.contentPaddingProperty] === undefined)) {
                // if padding was not configured using the appropriate contentPaddingProperty
                // then the padding will not be on the paddingContext, and therfore not included
                // in the outerCt measurement, so we need to read the padding from the
                // targetContext
                contentWidth += ownerContext.targetContext.getPaddingInfo().width;
            }
            return contentWidth;
        },

        /**
         * This method sets the height and/or width of the outerCt/innerCt to adjust for the
         * following browser-specific issues:
         *
         * 1. In IE6 and 7 strict if we are using the shrink wrap template, and the outerCt
         * has a 100% width (because the container is not shrink wrapping width currently),
         * and the target element has a vertical scrollbar, the browser disregards the
         * scrollbar when sizing the width of the outerCt.  This can result in the target
         * element gaining a horizontal scrollbar.  We fix this issue by setting a pixel
         * width on the outerCt
         *
         * 2. In IE quirks when using the "non shrink wrap" template, a long non-breaking word
         * can cause the outerCt's width to expand beyond the width of its container. This
         * behavior is desired if the container has the potential for horizontal overflow,
         * but can cause text to be hidden if the container's overflow is hidden. To prevent
         * this from happening we give the outerCt a fixed width in IE quirks when the
         * container does not have horizontal overflow.
         *
         * 3. In some browsers a percentage-height element ignores the horizontal scrollbar
         * of its parent (see Ext.supports.PercentageHeightOverflowBug).  If the browser is
         * affected by this bug the outerCt needs a pixel height in order to support
         * percentage-height children when not shrink-wrapping height. If the browser is not
         * affected by this bug, a height of 100% is assigned to the outerCt (see
         * beginLayoutCycle).
         *
         * 4. In IE6/7 strict when using the "shrink wrap" template, percentage heights on
         * children do not work unless the innerCt td has a height set.  We can't use height
         * 100% on the innerCt because conent-box sizing will cause any top/bottom padding to
         * be added to the height.  The solution is to set a pixel height on the innerCt.

         * 5. IE8 strict mode has a bug with percentage height children.  if the innerCt has
         * a height of 100%, has padding, and has a child item with a percentage height, that
         * child item will be sized as a percentage of the parent's height plus padding height.
         * In other words, a child with height:50% would have its height caclulated thusly:
         * (parentHeight + parentPaddingHeight) * 0.5
         * To fix this, we have to give the innerCt a pixel height.
         *
         * 6. In IE7 strict if we're using the "non shrink wrap" template, and the target
         * element has overflow-y:auto, the outerCt reserves space for the target element's
         * vertical scrollbar even when there is no vertical scrollbar.  This is fixed by
         * setting the targetEl's overflow property to "hidden" and then back to "auto".
         *
         * @protected
         * @param {Ext.layout.ContextItem} ownerContext
         * @param {Object} containerSize
         */
        setCtSizeIfNeeded: function(ownerContext, containerSize) {
            var me = this,
                width = containerSize.width,
                height = containerSize.height,
                padding = ownerContext.paddingContext.getPaddingInfo(),
                targetEl = me.getTarget(),
                overflowXStyle = me.getOverflowXStyle(ownerContext),
                overflowYStyle = me.getOverflowYStyle(ownerContext),
                canOverflowX = (overflowXStyle === 'auto' || overflowXStyle === 'scroll'),
                canOverflowY = (overflowYStyle === 'auto' || overflowYStyle === 'scroll'),
                scrollbarSize = Ext.getScrollbarSize(),
                isShrinkWrapTpl = me.isShrinkWrapTpl,
                manageOverflow = me.manageOverflow,
                overflowStyleName, needsOuterHeight, needsInnerHeight, needsInnerCtPaddingHeight;

            if (width && !ownerContext.widthModel.shrinkWrap &&
                // shrink wrap outerCt needs pixel width in IE6/7 strict because 100% width
                // on the outerCt causes it to overlap the vertical scrollbar
                ((Ext.isIE7m && Ext.isStrict && isShrinkWrapTpl && canOverflowY) ||
                // non shrink wrap tpl outerCt in IE quirks needs pixel width to prevent
                // non-breaking text from causing the outerCt to expand beyond the width
                // of its container.
                (Ext.isIEQuirks && !isShrinkWrapTpl && !canOverflowX))) {

                if (!manageOverflow) {
                    // If we're not managing overflow, the containerSize will not account for
                    // vertical scrollbar width, so we need to see if there is a vertical
                    // scrollbar and subtract its width
                    if (canOverflowY && (targetEl.dom.scrollHeight > targetEl.dom.clientHeight)) {
                        // has vertical scrollbar
                        width -= scrollbarSize.width;
                    }
                }

                ownerContext.outerCtContext.setProp('width', width + padding.width);
                me.hasOuterCtPxWidth = true;
            }

            if (height && !ownerContext.heightModel.shrinkWrap) {
                if (Ext.supports.PercentageHeightOverflowBug) {
                    // set a pixel height on the outerCt if the browser ignores horizontal
                    // scrollbar when rendering percentage-height elements
                    needsOuterHeight = true;
                }
                if (((Ext.isIE8 && Ext.isStrict) ||
                    Ext.isIE7m && Ext.isStrict && isShrinkWrapTpl)) {
                    // When using a shrink wrap template and not shrink wrapping, we set a
                    // pixel height on the innerCt to support percentage height children in
                    // IE6/7/8 strict.
                    needsInnerHeight = true;
                    // Do not add padding to the innerCt height in IE8 to prevent percentage-
                    // height children from adding padding height in their height calculation.
                    needsInnerCtPaddingHeight = !Ext.isIE8;
                }

                if ((needsOuterHeight || needsInnerHeight) && canOverflowX &&
                    (targetEl.dom.scrollWidth > targetEl.dom.clientWidth)) {
                    // adjust the height for scrollbar size since it's not accounted for
                    // in the containerSize.
                    // IE8 in what passes for "standards" mode does not tolerate -ve sizes
                    height = Math.max(height - scrollbarSize.height, 0);
                }

                if (needsOuterHeight) {
                    ownerContext.outerCtContext.setProp('height', height + padding.height);
                    me.hasOuterCtPxHeight = true;
                }

                if (needsInnerHeight) {
                    if (needsInnerCtPaddingHeight) {
                        height += padding.height;
                    }
                    ownerContext.innerCtContext.setProp('height', height);
                    me.hasInnerCtPxHeight = true;
                }
            }

            if (Ext.isIE7 && Ext.isStrict && !isShrinkWrapTpl && (overflowYStyle === 'auto')) {
                // IE7 strict has an insane bug where an auto-width element reserves
                // space for its parent's vertical scrollbar if the parent has
                // overflow-y:auto; even when no scrollbar is present.  To workaround
                // this issue we can set overflow-y to 'hidden' and then back to 'auto'.
                // If we have vertical overflow, however, tweaking overflow-y can cause an
                // illegitimate horizontal scrollbar to appear. So we have to tweak overflow-x
                // instead if the overflow-x style is "auto"
                overflowStyleName = (overflowXStyle === 'auto') ? 'overflow-x' : 'overflow-y';
                targetEl.setStyle(overflowStyleName, 'hidden');
                targetEl.setStyle(overflowStyleName, 'auto');
            }
        },

        setupRenderTpl: function (renderTpl) {
            this.callParent(arguments);

            renderTpl.renderPadding = this.doRenderPadding;
        },

        getContentTarget: function(){
            return this.innerCt;
        }

    }, function(){
        this.prototype.chromeCellMeasureBug = Ext.isChrome && Ext.chromeVersion >= 26;
    });