analytics/webcontent/bi/js/gemini/dashboard/layout/authoring/interaction/GridGuidelines.js

'use strict';

/**
 * Licensed Materials - Property of IBM
 * IBM Cognos Products: BI Cloud (C) Copyright IBM Corp. 2018
 * US Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
 *
 * Grid Guidelines
 */
define(['jquery', 'underscore', '../../../../lib/@waca/core-client/js/core-client/ui/core/Class'], function ($, _, Class) {

	var SQUARES_INFO = 60;
	var SQUARES = 100;

	var GridGuidelines = Class.extend({

		gridSize: 0,

		init: function init(options) {
			var $page = $(options.page);
			this.layoutController = options.controller;
			var layoutModel = this.layoutController.boardModel.layout.findModel(options.page.id);
			if (!layoutModel) {
				layoutModel = this.layoutController.boardModel.layout;
			}
			this.snapGrid = layoutModel.getValueFromSelfOrParent('snapGrid');
			this.snapGrid = this.snapGrid === undefined ? false : this.snapGrid;
			var layoutPositioning = layoutModel.getValueFromSelfOrParent('layoutPositioning');
			if (layoutPositioning === 'absolute') {
				this.gridSize = 10;
			} else if (layoutPositioning === 'relative') {
				this.gridSize = this.getGridSize($page);
			}
		},

		getGridSize: function getGridSize($page) {
			var gridSize = 0;

			if ($page) {
				var width = $page.width();

				if ($page.hasClass('infoGraphic')) {
					gridSize = width / SQUARES_INFO;
				} else {
					gridSize = width / SQUARES;
				}
			}

			return gridSize;
		},

		calculateSnapPoint: function calculateSnapPoint(dragEdge) {
			if (this.snapGrid) {
				var distance = dragEdge % this.gridSize;
				if (distance > this.gridSize - 0.5) {
					distance = 0;
				}
				return { 'distance': distance };
			}
			return { 'distance': null };
		}

	});
	return GridGuidelines;
});
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