    /**
     * This layout allows you to easily render content into an HTML table. The total number of columns can be specified, and
     * rowspan and colspan can be used to create complex layouts within the table. This class is intended to be extended or
     * created via the `layout: {type: 'table'}` {@link Ext.container.Container#layout} config, and should generally not
     * need to be created directly via the new keyword.
     *
     * Note that when creating a layout via config, the layout-specific config properties must be passed in via the {@link
     * Ext.container.Container#layout} object which will then be applied internally to the layout. In the case of
     * TableLayout, the only valid layout config properties are {@link #columns} and {@link #tableAttrs}. However, the items
     * added to a TableLayout can supply the following table-specific config properties:
     *
     *   - **rowspan** Applied to the table cell containing the item.
     *   - **colspan** Applied to the table cell containing the item.
     *   - **cellId** An id applied to the table cell containing the item.
     *   - **cellCls** A CSS class name added to the table cell containing the item.
     *
     * The basic concept of building up a TableLayout is conceptually very similar to building up a standard HTML table. You
     * simply add each panel (or "cell") that you want to include along with any span attributes specified as the special
     * config properties of rowspan and colspan which work exactly like their HTML counterparts. Rather than explicitly
     * creating and nesting rows and columns as you would in HTML, you simply specify the total column count in the
     * layout config and start adding panels in their natural order from left to right, top to bottom. The layout will
     * automatically figure out, based on the column count, rowspans and colspans, how to position each panel within the
     * table. Just like with HTML tables, your rowspans and colspans must add up correctly in your overall layout or you'll
     * end up with missing and/or extra cells! Example usage:
     *
     *     @example
     *     Ext.create('Ext.panel.Panel', {
     *         title: 'Table Layout',
     *         width: 300,
     *         height: 150,
     *         layout: {
     *             type: 'table',
     *             // The total column count must be specified here
     *             columns: 3
     *         },
     *         defaults: {
     *             // applied to each contained panel
     *             bodyStyle: 'padding:20px'
     *         },
     *         items: [{
     *             html: 'Cell A content',
     *             rowspan: 2
     *         },{
     *             html: 'Cell B content',
     *             colspan: 2
     *         },{
     *             html: 'Cell C content',
     *             cellCls: 'highlight'
     *         },{
     *             html: 'Cell D content'
     *         }],
     *         renderTo: Ext.getBody()
     *     });
     */
    Ext.define('Ext.layout.container.Table', {

        /* Begin Definitions */

        alias: ['layout.table'],
        extend: 'Ext.layout.container.Container',
        alternateClassName: 'Ext.layout.TableLayout',

        /* End Definitions */

        /**
         * @cfg {Number} columns
         * The total number of columns to create in the table for this layout. If not specified, all Components added to
         * this layout will be rendered into a single row using one column per Component.
         */

        // private
        monitorResize:false,

        type: 'table',

        clearEl: true, // Base class will not create it if already truthy. Not needed in tables.

        targetCls: Ext.baseCSSPrefix + 'table-layout-ct',
        tableCls: Ext.baseCSSPrefix + 'table-layout',
        cellCls: Ext.baseCSSPrefix + 'table-layout-cell',

        /**
         * @cfg {Object} tableAttrs
         * An object containing properties which are added to the {@link Ext.DomHelper DomHelper} specification used to
         * create the layout's `<table>` element. Example:
         *
         *     {
         *         xtype: 'panel',
         *         layout: {
         *             type: 'table',
         *             columns: 3,
         *             tableAttrs: {
         *                 style: {
         *                     width: '100%'
         *                 }
         *             }
         *         }
         *     }
         */
        tableAttrs: null,

        /**
         * @cfg {Object} trAttrs
         * An object containing properties which are added to the {@link Ext.DomHelper DomHelper} specification used to
         * create the layout's `<tr>` elements.
         */

        /**
         * @cfg {Object} tdAttrs
         * An object containing properties which are added to the {@link Ext.DomHelper DomHelper} specification used to
         * create the layout's `<td>` elements.
         */

        itemSizePolicy: {
            setsWidth: 0,
            setsHeight: 0
        },

        getItemSizePolicy: function (item) {
            return this.itemSizePolicy;
        },

        getLayoutItems: function() {
            var me = this,
                result = [],
                items = me.callParent(),
                item,
                len = items.length, i;

            for (i = 0; i < len; i++) {
                item = items[i];
                if (!item.hidden) {
                    result.push(item);
                }
            }
            return result;
        },

        /**
         * @private
         * Iterates over all passed items, ensuring they are rendered in a cell in the proper
         * location in the table structure.
         */
        renderChildren: function() {
            var me = this,
                items = me.getLayoutItems(),
                tbody = me.owner.getTargetEl().child('table', true).tBodies[0],
                rows = tbody.rows,
                i = 0,
                len = items.length,
                cells, curCell, rowIdx, cellIdx, item, trEl, tdEl, itemCt;

            // Calculate the correct cell structure for the current items
            cells = me.calculateCells(items);

            // Loop over each cell and compare to the current cells in the table, inserting/
            // removing/moving cells as needed, and making sure each item is rendered into
            // the correct cell.
            for (; i < len; i++) {
                curCell = cells[i];
                rowIdx = curCell.rowIdx;
                cellIdx = curCell.cellIdx;
                item = items[i];

                // If no row present, create and insert one
                trEl = rows[rowIdx];
                if (!trEl) {
                    trEl = tbody.insertRow(rowIdx);
                    if (me.trAttrs) {
                        trEl.set(me.trAttrs);
                    }
                }

                // If no cell present, create and insert one
                itemCt = tdEl = Ext.get(trEl.cells[cellIdx] || trEl.insertCell(cellIdx));
                if (me.needsDivWrap()) { //create wrapper div if needed - see docs below
                    itemCt = tdEl.first() || tdEl.createChild({tag: 'div'});
                    itemCt.setWidth(null);
                }

                // Render or move the component into the cell
                if (!item.rendered) {
                    me.renderItem(item, itemCt, 0);
                }
                else if (!me.isValidParent(item, itemCt, rowIdx, cellIdx, tbody)) {
                    me.moveItem(item, itemCt, 0);
                }

                // Set the cell properties
                if (me.tdAttrs) {
                    tdEl.set(me.tdAttrs);
                }
                if (item.tdAttrs) {
                    tdEl.set(item.tdAttrs);
                }
                tdEl.set({
                    colSpan: item.colspan || 1,
                    rowSpan: item.rowspan || 1,
                    id: item.cellId || '',
                    cls: me.cellCls + ' ' + (item.cellCls || '')
                });

                // If at the end of a row, remove any extra cells
                if (!cells[i + 1] || cells[i + 1].rowIdx !== rowIdx) {
                    cellIdx++;
                    while (trEl.cells[cellIdx]) {
                        trEl.deleteCell(cellIdx);
                    }
                }
            }

            // Delete any extra rows
            rowIdx++;
            while (tbody.rows[rowIdx]) {
                tbody.deleteRow(rowIdx);
            }
        },

        calculate: function (ownerContext) {
            if (!ownerContext.hasDomProp('containerChildrenDone')) {
                this.done = false;
            } else {
                var targetContext = ownerContext.targetContext,
                    widthShrinkWrap = ownerContext.widthModel.shrinkWrap,
                    heightShrinkWrap = ownerContext.heightModel.shrinkWrap,
                    shrinkWrap = heightShrinkWrap || widthShrinkWrap,
                    table = shrinkWrap && targetContext.el.child('table', true),
                    targetPadding = shrinkWrap && targetContext.getPaddingInfo();

                if (widthShrinkWrap) {
                    ownerContext.setContentWidth(table.offsetWidth + targetPadding.width, true);
                }

                if (heightShrinkWrap) {
                    ownerContext.setContentHeight(table.offsetHeight + targetPadding.height, true);
                }
            }
        },

        finalizeLayout: function() {
            if (this.needsDivWrap()) {
                // set wrapper div width to match layed out item - see docs below
                var items = this.getLayoutItems(),
                    i,
                    iLen  = items.length,
                    item;

                for (i = 0; i < iLen; i++) {
                    item = items[i];

                    Ext.fly(item.el.dom.parentNode).setWidth(item.getWidth());
                }
            }
            if (Ext.isIE6 || (Ext.isIEQuirks)) {
                // Fixes an issue where the table won't paint
                this.owner.getTargetEl().child('table').repaint();
            }
        },

        /**
         * @private
         * Determine the row and cell indexes for each component, taking into consideration
         * the number of columns and each item's configured colspan/rowspan values.
         * @param {Array} items The layout components
         * @return {Object[]} List of row and cell indexes for each of the components
         */
        calculateCells: function(items) {
            var cells = [],
                rowIdx = 0,
                colIdx = 0,
                cellIdx = 0,
                totalCols = this.columns || Infinity,
                rowspans = [], //rolling list of active rowspans for each column
                i = 0, j,
                len = items.length,
                item;

            for (; i < len; i++) {
                item = items[i];

                // Find the first available row/col slot not taken up by a spanning cell
                while (colIdx >= totalCols || rowspans[colIdx] > 0) {
                    if (colIdx >= totalCols) {
                        // move down to next row
                        colIdx = 0;
                        cellIdx = 0;
                        rowIdx++;

                        // decrement all rowspans
                        for (j = 0; j < totalCols; j++) {
                            if (rowspans[j] > 0) {
                                rowspans[j]--;
                            }
                        }
                    } else {
                        colIdx++;
                    }
                }

                // Add the cell info to the list
                cells.push({
                    rowIdx: rowIdx,
                    cellIdx: cellIdx
                });

                // Increment
                for (j = item.colspan || 1; j; --j) {
                    rowspans[colIdx] = item.rowspan || 1;
                    ++colIdx;
                }
                ++cellIdx;
            }

            return cells;
        },

        getRenderTree: function() {
            var me = this,
                items = me.getLayoutItems(),
                cells,
                rows = [],
                result = Ext.apply({
                    tag: 'table',
                    role: 'presentation',
                    cls: me.tableCls,
                    cellspacing: 0,
                    cn: {
                        tag: 'tbody',
                        cn: rows
                    }
                }, me.tableAttrs),
                tdAttrs = me.tdAttrs,
                needsDivWrap = me.needsDivWrap(),
                i, len = items.length, item, curCell, tr, rowIdx, cellIdx, cell;

            // Calculate the correct cell structure for the current items
            cells = me.calculateCells(items);

            for (i = 0; i < len; i++) {
                item = items[i];

                curCell = cells[i];
                rowIdx = curCell.rowIdx;
                cellIdx = curCell.cellIdx;

                // If no row present, create and insert one
                tr = rows[rowIdx];
                if (!tr) {
                    tr = rows[rowIdx] = {
                        tag: 'tr',
                        cn: []
                    };
                    if (me.trAttrs) {
                        Ext.apply(tr, me.trAttrs);
                    }
                }

                // If no cell present, create and insert one
                cell = tr.cn[cellIdx] = {
                    tag: 'td'
                };
                if (tdAttrs) {
                    Ext.apply(cell, tdAttrs);
                }
                Ext.apply(cell, {
                    colSpan: item.colspan || 1,
                    rowSpan: item.rowspan || 1,
                    id: item.cellId || '',
                    cls: me.cellCls + ' ' + (item.cellCls || '')
                });

                if (needsDivWrap) { //create wrapper div if needed - see docs below
                    cell = cell.cn = {
                        tag: 'div'
                    };
                }

                me.configureItem(item);
                // The DomHelper config of the item is the cell's sole child
                cell.cn = item.getRenderTree();
            }
            return result;
        },

        isValidParent: function(item, target, rowIdx, cellIdx) {
            var tbody,
                correctCell,
                table;

            // If we were called with the 3 arg signature just check that the parent table of the item is within the render target
            if (arguments.length === 3) {
                table = item.el.up('table');
                return table && table.dom.parentNode === target.dom;
            }
            tbody = this.owner.getTargetEl().child('table', true).tBodies[0];
            correctCell = tbody.rows[rowIdx].cells[cellIdx];
            return item.el.dom.parentNode === correctCell;
        },

        /**
         * @private
         * Opera 10.5 has a bug where if a table cell's child has box-sizing:border-box and padding, it
         * will include that padding in the size of the cell, making it always larger than the
         * shrink-wrapped size of its contents. To get around this we have to wrap the contents in a div
         * and then set that div's width to match the item rendered within it afterLayout. This method
         * determines whether we need the wrapper div; it currently does a straight UA sniff as this bug
         * seems isolated to just Opera 10.5, but feature detection could be added here if needed.
         */
        needsDivWrap: function() {
            return Ext.isOpera10_5;
        }
    });