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

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

/**
* @constructor
* @extends ResizingTool
* @class 
* A custom tool for resizing multiple objects at once.
*/
export class ResizeMultipleTool extends go.ResizingTool {
	public readonly name = "ResizeMultiple";

  /**
  * Overrides ResizingTool.resize to resize all selected objects to the same size.
  * @this {ResizeMultipleTool}
  * @param {Rect} newr the intended new rectangular bounds for each Part's {@link Part#resizeObject}.
  */
	public resize(newr: go.Rect) {
		var diagram = this.diagram;
		if (diagram === null) return;
		diagram.selection.each(function (part) {
			if (part instanceof go.Link || part instanceof go.Group) return; // only Nodes and simple Parts
			var obj = part.resizeObject;

			// calculate new location
			var pos = part.position.copy();
			var angle = obj.getDocumentAngle();
			var sc = obj.getDocumentScale();

			var radAngle = Math.PI * angle / 180;
			var angleCos = Math.cos(radAngle);
			var angleSin = Math.sin(radAngle);

			var deltaWidth = newr.width - obj.naturalBounds.width;
			var deltaHeight = newr.height - obj.naturalBounds.height;

			var angleRight = (angle > 270 || angle < 90) ? 1 : 0;
			var angleBottom = (angle > 0 && angle < 180) ? 1 : 0;
			var angleLeft = (angle > 90 && angle < 270) ? 1 : 0;
			var angleTop = (angle > 180 && angle < 360) ? 1 : 0;

			pos.x += sc * ((newr.x + deltaWidth * angleLeft) * angleCos - (newr.y + deltaHeight * angleBottom) * angleSin);
			pos.y += sc * ((newr.x + deltaWidth * angleTop) * angleSin + (newr.y + deltaHeight * angleLeft) * angleCos);

			obj.desiredSize = newr.size;
			part.position = pos;
		});
	}

}