"use strict";
/*
*  Copyright (C) 1998-2017 by Northwoods Software Corporation. All Rights Reserved.
*/

import * as go from "../release/go";

// This layout is patterned after the "Table" Panel layout.

/**
* @constructor
* @extends Layout
* @class
* This Layout positions non-Link Parts into a table according to the values of
* GraphObject.row, GraphObject.column, GraphObject.rowSpan, GraphObject.columnSpan,
* GraphObject.alignment, GraphObject.stretch.
* If the value of GraphObject.stretch is not go.GraphObject.None, the Part will be sized
* according to the available space in the cell(s).
* <p>
* You can specify constraints for whole rows or columns by calling
* getRowDefinition(row) or getColumnDefinition(col) and setting one of the following properties:
* RowColumnDefinition.alignment, RowColumnDefinition.height, RowColumnDefinition.width,
* RowColumnDefinition.maximum, RowColumnDefinition.minimum, RowColumnDefinition.stretch.
* <p>
* The defaultAlignment and defaultStretch properties apply to all parts if not specified
* on the individual Part or in the corresponding row or column definition.
* <p>
* At the current time, there is no support for separator lines
* (RowColumnDefinition.separatorStroke, separatorStrokeWidth, and separatorDashArray properties)
* nor background (RowColumnDefinition.background and coversSeparators properties).
* There is no support for RowColumnDefinition.sizing, either.
*/
export class TableLayout extends go.Layout {
	/** @type {Spot} */
	private _defaultAlignment: go.Spot = go.Spot.Default;
	/** @type {EnumValue} */
	private _defaultStretch: go.EnumValue = go.GraphObject.Default;
	/** @type {Array} */
	private _rowDefs: any = [];
	/** @type {Array} */
	private _colDefs: any = [];
	protected cloneProtected(copy: TableLayout) {
		super.cloneProtected.call(this, copy);
		copy._defaultAlignment = this._defaultAlignment;
		copy._defaultStretch = this._defaultStretch;
		for (var i = 0; i < this._rowDefs.length; i++) {
			var def = this._rowDefs[i];
			copy._rowDefs.push(def !== undefined ? def.copy() : def);
		}
		for (var i = 0; i < this._colDefs.length; i++) {
			var def = this._colDefs[i];
			copy._colDefs.push(def !== undefined ? def.copy() : def);
		}
	};

  /**
  * Gets the {@link RowColumnDefinition} for a particular row in this TableLayout.
  * If you ask for the definition of a row at or beyond the {@link #rowCount},
  * it will automatically create one and return it.
  * @this {TableLayout}
  * @param {number} idx the non-negative zero-based integer row index.
  * @return {RowColumnDefinition}
  */
	public getRowDefinition(idx: number): go.RowColumnDefinition {
		if (idx < 0) throw new Error("Row index must be non-negative, not: " + idx);
		idx = Math.round(idx);
		var defs = this._rowDefs;

		var d = defs[idx];
		if (d === undefined) {
			d = new go.RowColumnDefinition();
			// .panel remains null
			d.isRow = true;
			d.index = idx;
			defs[idx] = d;
		}
		return d;
	}

  /**
  * Returns the row at a given y-coordinate in document coordinates.
  * This information is only valid when this layout has been performed and {#Layout.isValidLayout}.
  * <p>
  * If the point is above row 0, this method returns -1.
  * If the point below the last row, this returns the last row + 1.
  * @this {TableLayout}
  * @param {number} y
  * @return {number} a zero-based integer
  * @see #findColumnForDocumentX
  */
	public findRowForDocumentY(y: number): number {
		y -= this.arrangementOrigin.y;
		if (y < 0) return -1;
		var total = 0.0;
		var it = this._rowDefs;
		var l = it.length;
		for (var i = 0; i < l; i++) {
			var def = it[i];
			if (def === undefined) continue;
			total += def.total;
			if (y < total) {
				return i;
			}
		}
		return i;
	}

  /**
  * Gets the {@link RowColumnDefinition} for a particular column in this TableLayout.
  * If you ask for the definition of a column at or beyond the {@link #columnCount},
  * it will automatically create one and return it.
  * @this {TableLayout}
  * @param {number} idx the non-negative zero-based integer column index.
  * @return {RowColumnDefinition}
  */
	public getColumnDefinition(idx: number): go.RowColumnDefinition {
		if (idx < 0) throw new Error("Column index must be non-negative, not: " + idx);
		idx = Math.round(idx);
		var defs = this._colDefs;

		var d = defs[idx];
		if (d === undefined) {
			d = new go.RowColumnDefinition();
			// .panel remains null
			d.isRow = false;
			d.index = idx;
			defs[idx] = d;
		}
		return d;
	}

  /**
  * Returns the cell at a given x-coordinate in document coordinates.
  * This information is only valid when this layout has been performed and {#Layout.isValidLayout}.
  * <p>
  * If the point is to left of the column 0, this method returns -1.
  * If the point to to the right of the last column, this returns the last column + 1.
  * @this {TableLayout}
  * @param {number} x
  * @return {number} a zero-based integer
  * @see #findRowForDocumentY
  */
	public findColumnForDocumentX(x: number): number {
		x -= this.arrangementOrigin.x;
		if (x < 0) return -1;
		var total = 0.0;
		var it = this._colDefs;
		var l = it.length;
		for (var i = 0; i < l; i++) {
			var def = it[i];
			if (def === undefined) continue;
			total += def.total;
			if (x < total) {
				return i;
			}
		}
		return i;
	}

  /**
  * @ignore
  * @this {TableLayout}
  * @param {Part} child
  * @param {Part} row
  * @param {Part} col
  * @return {EnumValue}
  */
	public getEffectiveTableStretch(child: go.Part, row: go.RowColumnDefinition, col: go.RowColumnDefinition): go.EnumValue {
		var effectivestretch = child.stretch;
		if (effectivestretch !== go.GraphObject.Default) return effectivestretch;
		// which directions are we stretching?
		// undefined = default
		var horizontal = undefined;
		var vertical = undefined;
		switch (row.stretch) {
			case go.GraphObject.Default:
			case go.GraphObject.Horizontal: break;
			case go.GraphObject.Vertical: vertical = true; break;
			case go.GraphObject.Fill: vertical = true; break;
		}
		switch (col.stretch) {
			case go.GraphObject.Default:
			case go.GraphObject.Vertical: break;
			case go.GraphObject.Horizontal: horizontal = true; break;
			case go.GraphObject.Fill: horizontal = true; break;
		}

		var str = this.defaultStretch;
		if (horizontal === undefined && (str === go.GraphObject.Horizontal || str === go.GraphObject.Fill)) {
			horizontal = true;
		} else {
			horizontal = false;
		}
		if (vertical === undefined && (str === go.GraphObject.Vertical || str === go.GraphObject.Fill)) {
			vertical = true;
		} else {
			vertical = false;
		}
		if (horizontal === true && vertical === true) return go.GraphObject.Fill;
		if (horizontal === true) return go.GraphObject.Horizontal;
		if (vertical === true) return go.GraphObject.Vertical;
		return go.GraphObject.None; // Everything else is none by default
	};

  /**
  * @ignore
  * @override
  * @this {TableLayout}
  */
	public doLayout(coll: go.Iterable<go.Part>) {
		this.arrangementOrigin = this.initialOrigin(this.arrangementOrigin);
		// put all eligible Parts that are not Links into an Array
		var parts = new go.List(go.Part) as go.List<go.Part>;
		this.collectParts(coll).each((p) => {
			if (!(p instanceof go.Link)) {
				p.ensureBounds();
				parts.add(p);
			}
		});

		this.diagram.startTransaction("TableLayout");
		var union = new go.Size();
		var rowcol = this.measureTable(Infinity, Infinity, parts, union, 0, 0);
		this.arrangeTable(parts, union, rowcol);
		this.diagram.commitTransaction("TableLayout");
	};

  /**
  * @ignore
  * @override
  * @this {TableLayout}
  */
	public measureTable(width: number, height: number, children: go.List<go.Part>, union: go.Size, minw: number, minh: number): Array<Array<any>> {
		var l = children.length;
		// Make the array that holds [rows][cols] of the table
		var rowcol: Array<Array<any>> = []; // saved (so no temp array) starts as an array of rows, will end up [row][col][cell]
		for (var i = 0; i < l; i++) {
			var child = children.elt(i);
			if (!rowcol[child.row]) {
				rowcol[child.row] = []; // make new column for this row
			}
			if (!rowcol[child.row][child.column]) {
				rowcol[child.row][child.column] = []; // new list for this cell
			}
			rowcol[child.row][child.column].push(child); // push child into right cell
		}

		// Reset the row/col definitions because the ones from last measure are irrelevant
		var resetCols = [];  // keep track of which columns we've already reset

		// Objects that span multiple columns and
		var spanners = [];
		var nosize = [];
		// These hashes are used to tally the number of rows and columns that do not have a size
		var nosizeCols = { count: 0 };
		var nosizeRows = { count: 0 };

		var colleft = width;
		var rowleft = height;

		var defs = this._rowDefs;
		l = defs.length;
		for (var i = 0; i < l; i++) {
			var def = defs[i];
			if (def !== undefined) def.actual = 0;
		}

		defs = this._colDefs;
		l = defs.length;
		for (var i = 0; i < l; i++) {
			var def = defs[i];
			if (def !== undefined) def.actual = 0;
		}

		var lrow = rowcol.length; //number of rows
		var lcol = 0;
		for (var i = 0; i < lrow; i++) {
			if (!rowcol[i]) continue;
			lcol = Math.max(lcol, rowcol[i].length); // column length in this row
		}

		// Go through each cell (first pass)
		var amt = 0.0;
		lrow = rowcol.length; //number of rows
		for (var i = 0; i < lrow; i++) {
			if (!rowcol[i]) continue;
			lcol = rowcol[i].length; // column length in this row
			var rowHerald = this.getRowDefinition(i);
			rowHerald.actual = 0; // Reset rows (only on first pass)
			for (var j = 0; j < lcol; j++) {
				//foreach column j in row i...
				if (!rowcol[i][j]) continue;
				var colHerald = this.getColumnDefinition(j);
				if (resetCols[j] === undefined) { // make sure we only reset these once
					colHerald.actual = 0;
					resetCols[j] = true;
				}

				var cell = rowcol[i][j];
				var len = cell.length;
				for (var k = 0; k < len; k++) {
					//foreach element in cell, measure
					var child: go.Part = cell[k];

					// Skip children that span more than one row or column or do not have a set size
					var spanner = (child.rowSpan > 1 || child.columnSpan > 1);
					if (spanner) {
						spanners.push(child);
						// We used to not measure spanners twice, but now we do
						// The reason is that there may be a row whose size
						// is dictated by an object with columnSpan 2+ and vice versa

						// continue;
					}

					var marg = child.margin as go.Margin;
					var margw = marg.right + marg.left;
					var margh = marg.top + marg.bottom;

					var stretch = this.getEffectiveTableStretch(child, rowHerald, colHerald);
					var dsize = child.resizeObject.desiredSize;
					var realwidth = !(isNaN(dsize.width));
					var realheight = !(isNaN(dsize.height));
					var realsize = realwidth && realheight;
					if (!spanner && stretch !== go.GraphObject.None && !realsize) {
						if ((<any>nosizeCols)[j] === undefined && (stretch === go.GraphObject.Fill || stretch === go.GraphObject.Horizontal)) {
							(<any>nosizeCols)[j] = -1; nosizeCols.count++;
						}
						if ((<any>nosizeCols)[i] === undefined && (stretch === go.GraphObject.Fill || stretch === go.GraphObject.Vertical)) {
							(<any>nosizeCols)[i] = -1; nosizeRows.count++;
						}
						nosize.push(child);
					}

					if (stretch !== go.GraphObject.None) {
						var unrestrictedSize = new go.Size(NaN, NaN);
						//if (stretch !== go.GraphObject.Horizontal) unrestrictedSize.height = rowHerald.minimum;
						//if (stretch !== go.GraphObject.Vertical) unrestrictedSize.width = colHerald.minimum;
						//??? allow resizing during measure phase
						child.resizeObject.desiredSize = unrestrictedSize;
						child.ensureBounds();
					}

					var m = child.actualBounds;
					var mwidth = Math.max(m.width + margw, 0);
					var mheight = Math.max(m.height + margh, 0);

					//  Make sure the heralds have the right layout size
					//    the row/column should use the largest meausured size of any
					//    GraphObject contained, constrained by mins and maxes
					if (child.rowSpan === 1 && (realheight || stretch === go.GraphObject.None || stretch === go.GraphObject.Horizontal)) {
						var myDef = this.getRowDefinition(i);
						amt = Math.max(mheight - myDef.actual, 0);
						if (amt > rowleft) amt = rowleft;
						myDef.actual = myDef.actual + amt;
						rowleft = Math.max(rowleft - amt, 0);
					}

					if (child.columnSpan === 1 && (realwidth || stretch === go.GraphObject.None || stretch === go.GraphObject.Vertical)) {
						var myDef = this.getColumnDefinition(j);
						amt = Math.max(mwidth - myDef.actual, 0);
						if (amt > colleft) amt = colleft;
						myDef.actual = myDef.actual + amt;
						colleft = Math.max(colleft - amt, 0);
					}

				} // end cell
			} // end col
		} //end row

		// For objects of no desired size we allocate what is left as we go,
		// or else what is already in the column
		var totalColWidth = 0.0;
		var totalRowHeight = 0.0;
		l = this.columnCount;
		for (var i = 0; i < l; i++) {
			if (this._colDefs[i] === undefined) continue;
			totalColWidth += this.getColumnDefinition(i).actual;
		}
		l = this.rowCount;
		for (var i = 0; i < l; i++) {
			if (this._rowDefs[i] === undefined) continue;
			totalRowHeight += this.getRowDefinition(i).actual;
		}
		colleft = Math.max(width - totalColWidth, 0);
		rowleft = Math.max(height - totalRowHeight, 0);
		var originalrowleft = rowleft;
		var originalcolleft = colleft;

		// Determine column sizes for the yet-to-be-sized columns
		l = nosize.length;
		for (var i = 0; i < l; i++) {
			var child = nosize[i];
			var rowHerald = this.getRowDefinition(child.row);
			var colHerald = this.getColumnDefinition(child.column);
			// We want to gather the largest difference between desired and expected col/row sizes
			var mb = child.actualBounds;
			var marg = child.margin as go.Margin;
			var margw = marg.right + marg.left;
			var margh = marg.top + marg.bottom;

			if (colHerald.actual === 0 && (<any>nosizeCols)[child.column] !== undefined) {
				(<any>nosizeCols)[child.column] = Math.max(mb.width + margw, (<any>nosizeCols)[child.column]);
			} else {
				(<any>nosizeCols)[child.column] = null; // obey the column herald
			}
			if (rowHerald.actual === 0 && (<any>nosizeRows)[child.row] !== undefined) {
				(<any>nosizeRows)[child.row] = Math.max(mb.height + margh, (<any>nosizeRows)[child.row]);
			} else {
				(<any>nosizeRows)[child.row] = null; // obey the row herald
			}
		}
		// we now have the size that all these columns prefer to be
		// we also have the amount left over
		var desiredRowTotal = 0.0;
		var desiredColTotal = 0.0;
		for (let j in nosizeRows) { if (parseInt(j) !== nosizeRows.count) desiredRowTotal += (<any>nosizeRows)[i] }
		for (let j in nosizeCols) { if (parseInt(j) !== nosizeCols.count) desiredColTotal += (<any>nosizeCols)[i] }

		var allowedSize = new go.Size(); // used in stretch and span loops

		// Deal with objects that have a stretch
		for (var i = 0; i < l; i++) {
			var child = nosize[i];
			var rowHerald = this.getRowDefinition(child.row);
			var colHerald = this.getColumnDefinition(child.column);

			var w = 0.0;
			if (isFinite(colHerald.width)) {
				w = colHerald.width;
			} else {
				if (isFinite(colleft) && (<any>nosizeCols)[child.column] !== null) {
					if (desiredColTotal === 0) w = colHerald.actual + colleft;
					else w = /*colHerald.actual +*/ (((<any>nosizeCols)[child.column] / desiredColTotal) * originalcolleft);
				} else {
					// Only use colHerald.actual if it was nonzero before this loop
					if ((<any>nosizeCols)[child.column] !== null) w = colleft;
					else w = colHerald.actual || colleft;
					//w = nosizeCols[child.column] || colleft; // Older, less correct way
				}
				w = Math.max(0, w - colHerald.computeEffectiveSpacing());
			}
			var h = 0.0;
			if (isFinite(rowHerald.height)) {
				h = rowHerald.height;
			} else {
				if (isFinite(rowleft) && (<any>nosizeRows)[child.row] !== null) {
					if (desiredRowTotal === 0) h = rowHerald.actual + rowleft;
					else h = /*rowHerald.actual +*/ (((<any>nosizeRows)[child.row] / desiredRowTotal) * originalrowleft);
				} else {
					// Only use rowHerald.actual if it was nonzero before this loop
					if ((<any>nosizeRows)[child.row] !== null) h = rowleft;
					else h = rowHerald.actual || rowleft;
					//h = nosizeRows[child.row] || rowleft; // Older, less correct way
				}
				h = Math.max(0, h - rowHerald.computeEffectiveSpacing());
			}

			allowedSize.setTo(
				Math.max(colHerald.minimum, Math.min(w, colHerald.maximum)),
				Math.max(rowHerald.minimum, Math.min(h, rowHerald.maximum)));

			// Which way do we care about fill:
			var stretch = this.getEffectiveTableStretch(child, rowHerald, colHerald);
			// This used to set allowedSize height/width to Infinity,
			// but we can only set it to the current row/column space, plus rowleft/colleft values, at most.
			switch (stretch) {
				case go.GraphObject.Horizontal: // H stretch means it can be as large as its wants vertically
					allowedSize.height = Math.max(allowedSize.height, rowHerald.actual + rowleft);
					break;
				case go.GraphObject.Vertical: // vice versa
					allowedSize.width = Math.max(allowedSize.width, colHerald.actual + colleft);
					break;
			}

			var marg = child.margin as go.Margin;
			var margw = marg.right + marg.left;
			var margh = marg.top + marg.bottom;

			var m = child.actualBounds;
			var mwidth = Math.max(m.width + margw, 0);
			var mheight = Math.max(m.height + margh, 0);
			if (isFinite(colleft)) mwidth = Math.min(mwidth, allowedSize.width);
			if (isFinite(rowleft)) mheight = Math.min(mheight, allowedSize.height);

			var oldAmount = 0.0;

			oldAmount = rowHerald.actual;
			rowHerald.actual = Math.max(rowHerald.actual, mheight);
			amt = rowHerald.actual - oldAmount;
			rowleft = Math.max(rowleft - amt, 0);

			oldAmount = colHerald.actual;
			colHerald.actual = Math.max(colHerald.actual, mwidth);
			amt = colHerald.actual - oldAmount;
			colleft = Math.max(colleft - amt, 0);
		} // end no fixed size objects

  // Go through each object that spans multiple rows or columns
  var additionalSpan = new go.Size();
  l = spanners.length;
  if (l !== 0) {
    // record the actual sizes of every row/column before measuring spanners
    // because they will change during the loop and we want to use their 'before' values
    var actualSizeRows = [];
    var actualSizeColumns = [];
    for (var i = 0; i < lrow; i++) {
      if (!rowcol[i]) continue;
      lcol = rowcol[i].length; // column length in this row
      var rowHerald = this.getRowDefinition(i);
      actualSizeRows[i] = rowHerald.actual;
      for (var j = 0; j < lcol; j++) {
        //foreach column j in row i...
        if (!rowcol[i][j]) continue;
        var colHerald = this.getColumnDefinition(j);
        actualSizeColumns[j] = colHerald.actual;
      }
    }
  }
  for (var i = 0; i < l; i++) {
    var child = spanners[i];
    var rowHerald = this.getRowDefinition(child.row);
    var colHerald = this.getColumnDefinition(child.column);

    // If there's a set column width/height we don't care about the given width/height
    allowedSize.setTo(
      Math.max(colHerald.minimum, Math.min(width, colHerald.maximum)),
      Math.max(rowHerald.minimum, Math.min(height, rowHerald.maximum)));

    // If it is a spanner and has a fill:
    var stretch = this.getEffectiveTableStretch(child, rowHerald, colHerald);
    switch (stretch) {
      case go.GraphObject.Fill:
        if (actualSizeColumns[colHerald.index] !== 0) allowedSize.width = Math.min(allowedSize.width, actualSizeColumns[colHerald.index]);
        if (actualSizeRows[rowHerald.index] !== 0) allowedSize.height = Math.min(allowedSize.height, actualSizeRows[rowHerald.index]);
        break;
      case go.GraphObject.Horizontal:
        if (actualSizeColumns[colHerald.index] !== 0) allowedSize.width = Math.min(allowedSize.width, actualSizeColumns[colHerald.index]);
        break;
      case go.GraphObject.Vertical:
        if (actualSizeRows[rowHerald.index] !== 0) allowedSize.height = Math.min(allowedSize.height, actualSizeRows[rowHerald.index]);
        break;
    }
    // If there's a set column width/height we don't care about any of the above:
    if (isFinite(colHerald.width)) allowedSize.width = colHerald.width;
    if (isFinite(rowHerald.height)) allowedSize.height = rowHerald.height;

    // take into account rowSpan and columnSpan
    additionalSpan.setTo(0, 0);
    for (var n = 1; n < child.rowSpan; n++) {
      if (child.row + n >= this.rowCount) break; // if the row exists at all
      def = this.getRowDefinition(child.row + n);
      amt = 0;
      if (stretch === go.GraphObject.Fill || stretch === go.GraphObject.Vertical) {
        amt = Math.max(def.minimum, (actualSizeRows[child.row + n] === 0) ? def.maximum : Math.min(actualSizeRows[child.row + n], def.maximum));
      } else {
        amt = Math.max(def.minimum, isNaN(def.size) ? def.maximum : Math.min(def.size, def.maximum));
      }
      additionalSpan.height += amt;
    }
    for (var n = 1; n < child.columnSpan; n++) {
      if (child.column + n >= this.columnCount) break; // if the col exists at all
      def = this.getColumnDefinition(child.column + n);
      amt = 0;
      if (stretch === go.GraphObject.Fill || stretch === go.GraphObject.Horizontal) {
        amt = Math.max(def.minimum, (actualSizeColumns[child.column + n] === 0) ? def.maximum : Math.min(actualSizeColumns[child.column + n], def.maximum));
      } else {
        amt = Math.max(def.minimum, isNaN(def.size) ? def.maximum : Math.min(def.size, def.maximum));
      }
      additionalSpan.width += amt;
    }
    allowedSize.width += additionalSpan.width;
    allowedSize.height += additionalSpan.height;

			var marg = child.margin as go.Margin;
			var margw = marg.right + marg.left;
			var margh = marg.top + marg.bottom;
			var m = child.actualBounds;
			var mwidth = Math.max(m.width + margw, 0);
			var mheight = Math.max(m.height + margh, 0);

			var totalRow = 0.0;
			for (var n = 0; n < child.rowSpan; n++) {
				if (child.row + n >= this.rowCount) break; // if the row exists at all
				def = this.getRowDefinition(child.row + n);
				totalRow += def.total || 0;
			}
			// def is the last row definition
			if (totalRow < mheight) {
				var roomLeft = mheight - totalRow;
				while (roomLeft > 0) { // Add the extra to the first row that allows us to
					var act = def.actual || 0;
					if (isNaN(def.height) && def.maximum > act) {
						def.actual = Math.min(def.maximum, act + roomLeft);
						if (def.actual !== act) roomLeft -= def.actual - act;
					}
					if (def.index - 1 === -1) break;
					def = this.getRowDefinition(def.index - 1);
				}
			}

			var totalCol = 0.0;
			for (var n = 0; n < child.columnSpan; n++) {
				if (child.column + n >= this.columnCount) break; // if the col exists at all
				def = this.getColumnDefinition(child.column + n);
				totalCol += def.total || 0;
			}
			// def is the last col definition
			if (totalCol < mwidth) {
				var roomLeft = mwidth - totalCol;
				while (roomLeft > 0) { // Add the extra to the first row that allows us to
					var act = def.actual || 0;
					if (isNaN(def.width) && def.maximum > act) {
						def.actual = Math.min(def.maximum, act + roomLeft);
						if (def.actual !== act) roomLeft -= def.actual - act;
					}
					if (def.index - 1 === -1) break;
					def = this.getColumnDefinition(def.index - 1);
				}
			}
		} // end spanning objects

		l = this.columnCount;
		for (var i = 0; i < l; i++) {
			if (this._colDefs[i] === undefined) continue;
			def = this.getColumnDefinition(i);
			def.position = union.width;
			if (def.actual !== 0) {
				union.width += def.actual;
				union.width += def.computeEffectiveSpacing();
			}
		}

		l = this.rowCount;
		for (var i = 0; i < l; i++) {
			if (this._rowDefs[i] === undefined) continue;
			def = this.getRowDefinition(i);
			def.position = union.height;
			if (def.actual !== 0) {
				union.height += def.actual;
				union.height += def.computeEffectiveSpacing();
			}
		}

		// save these for arrange (destroy them or not? Possibly needed for drawing spacers)
		return rowcol;
	}; // end measureTable


  /**
  * @ignore
  * @override
  * @this {TableLayout}
  */
	public arrangeTable(children: go.List<go.Part>, union: go.Size, rowcol: Array<Array<any>>) {
		var l = children.length;
		var originx = this.arrangementOrigin.x;
		var originy = this.arrangementOrigin.y;
		var x = 0.0;
		var y = 0.0;

		var lrow = (<any>rowcol).length; //number of rows
		var lcol = 0;
		for (var i = 0; i < lrow; i++) {
			if (!(<any>rowcol)[i]) continue;
			lcol = Math.max(lcol, (<any>rowcol)[i].length); // column length in this row
		}

		var additionalSpan = new go.Size();
		// Find cell space and arrange objects:
		for (var i = 0; i < lrow; i++) {
			if (!rowcol[i]) continue;
			lcol = rowcol[i].length; // column length in this row
			var rowHerald = this.getRowDefinition(i);
			y = originy + rowHerald.position + rowHerald.computeEffectiveSpacingTop();
			for (var j = 0; j < lcol; j++) {
				//foreach column j in row i...
				if (!rowcol[i][j]) continue;
				var colHerald = this.getColumnDefinition(j);
				x = originx + colHerald.position + colHerald.computeEffectiveSpacingTop();
				var cell = rowcol[i][j];
				var len = cell.length;

				for (var k = 0; k < len; k++) {
					//foreach element in cell
					var child = cell[k];

					// add to layoutWidth/Height any additional span
					additionalSpan.setTo(0, 0);

					for (var n = 1; n < child.rowSpan; n++) {
						// if the row exists at all
						if (i + n >= this.rowCount) break;
						var rh = this.getRowDefinition(i + n);
						additionalSpan.height += rh.total;
					}

					for (var n = 1; n < child.columnSpan; n++) {
						// if the col exists at all
						if (j + n >= this.columnCount) break;
						var ch = this.getColumnDefinition(j + n);
						additionalSpan.width += ch.total;
					}

					// Construct containing rect (cell):

					// total width and height of the cell that an object could possibly be created in
					var colwidth = colHerald.actual + additionalSpan.width;
					var rowheight = rowHerald.actual + additionalSpan.height;

					// construct a rect that represents the total cell size allowed for this object
					var ar = new go.Rect();
					ar.x = x;
					ar.y = y;
					ar.width = colwidth;
					ar.height = rowheight;

					// Also keep them for clip values
					var cellx = x;
					var celly = y;
					var cellw = colwidth;
					var cellh = rowheight;
					// Ending rows/col might have actual spaces that are larger than the remaining space
					// Modify them for clipping regions
					if (x + colwidth > union.width) cellw = Math.max(union.width - x, 0);
					if (y + rowheight > union.height) cellh = Math.max(union.height - y, 0);


					// Construct alignment:
					var align = child.alignment;
					var alignx = 0.0;
					var aligny = 0.0;
					var alignoffsetX = 0.0;
					var alignoffsetY = 0.0;
					if (align.isDefault()) {
						align = this.defaultAlignment;
						if (!align.isSpot()) align = go.Spot.Center;
						alignx = align.x;
						aligny = align.y;
						alignoffsetX = align.offsetX;
						alignoffsetY = align.offsetY;
						var ca = colHerald.alignment;
						var ra = rowHerald.alignment;
						if (ca.isSpot()) {
							alignx = ca.x;
							alignoffsetX = ca.offsetX;
						}
						if (ra.isSpot()) {
							aligny = ra.y;
							alignoffsetY = ra.offsetY;
						}
					} else {
						alignx = align.x;
						aligny = align.y;
						alignoffsetX = align.offsetX;
						alignoffsetY = align.offsetY;
					}

					// same as if (!align.isSpot()) align = go.Spot.Center;
					if (isNaN(alignx) || isNaN(aligny)) {
						alignx = 0.5;
						aligny = 0.5;
						alignoffsetX = 0;
						alignoffsetY = 0;
					}

					var width = 0.0;
					var height = 0.0;

					var marg = child.margin;
					var margw = marg.left + marg.right;
					var margh = marg.top + marg.bottom;
					var stretch = this.getEffectiveTableStretch(child, rowHerald, colHerald);
					if (/* isNaN(child.resizeObject.desiredSize.width) && */ (stretch === go.GraphObject.Fill || stretch === go.GraphObject.Horizontal))
						width = Math.max(colwidth - margw, 0);
					else
						width = child.actualBounds.width;
					if (/* isNaN(child.resizeObject.desiredSize.height) && */ (stretch === go.GraphObject.Fill || stretch === go.GraphObject.Vertical))
						height = Math.max(rowheight - margh, 0);
					else
						height = child.actualBounds.height;

					// min and max override any stretch values
					var max = child.maxSize;
					var min = child.minSize;
					width = Math.min(max.width, width);
					height = Math.min(max.height, height);
					width = Math.max(min.width, width);
					height = Math.max(min.height, height);

					var widthmarg = width + margw;
					var heightmarg = height + margh;

					ar.x += (ar.width * alignx) - (widthmarg * alignx) + alignoffsetX + marg.left;
					ar.y += (ar.height * aligny) - (heightmarg * aligny) + alignoffsetY + marg.top;

					child.moveTo(ar.x, ar.y);
					if (stretch !== go.GraphObject.None) {
						child.resizeObject.desiredSize = new go.Size(width, height);
					}

				} // end cell
			} // end col
		} //end row
	}; // end arrangeTable

	/**
	* Gets or sets the alignment to use by default for Parts in rows (vertically) and in columns (horizontally).
	* The default value is {@link Spot#Default}.
	* Setting this property does not raise any events.
	* @name TableLayout#defaultAlignment
	* @function.
	* @return {Spot}
	*/
	get defaultAlignment(): go.Spot { return this._defaultAlignment; }
	set defaultAlignment(val: go.Spot) { this._defaultAlignment = val; }
  /**
  * Gets or sets whether Parts should be stretched in rows (vertically) and in columns (horizontally).
  * The default value is {@link GraphObject#Default}.
  * Setting this property does not raise any events.
  * @name TableLayout#defaultStretch
  * @function.
  * @return {EnumValue}
  */
	get defaultStretch(): go.EnumValue { return this._defaultStretch; }
	set defaultStretch(val: go.EnumValue) { this._defaultStretch = val; }

	/**
  * This read-only property returns the number of rows in this TableLayout.
  * This value is only valid after the layout has been performed.
  * @name TableLayout#rowCount
  * @function.
  * @return {number}
  */
	get rowCount(): number { return this._rowDefs.length; }

	/**
  * This read-only property returns the number of columns in this TableLayout.
  * This value is only valid after the layout has been performed.
  * @name TableLayout#rowCount
  * @function.
  * @return {number}
  */
	get columnCount(): number { return this._colDefs.length; }

	// end TableLayout class
}