analytics/webcontent/bi/js/dashboard-analytics/extensions/viprUITest/content-features/BinarySearchTupleLocator.js

'use strict';

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

/**
 *+------------------------------------------------------------------------+
 *| Licensed Materials - Property of IBM
 *| IBM Cognos Products: Dashboard
 *| (C) Copyright IBM Corp. 2018, 2019
 *|
 *| US Government Users Restricted Rights - Use, duplication or disclosure
 *| restricted by GSA ADP Schedule Contract with IBM Corp.
 *+------------------------------------------------------------------------+
 */
define(['underscore', './AbstractTupleLocator'], function (_, AbstractTupleLocator) {
	var BinarySearchTupleLocator = function (_AbstractTupleLocator) {
		_inherits(BinarySearchTupleLocator, _AbstractTupleLocator);

		/**
   * A tuple locator which deals with tuples which the VIDA getItemsInPolygon
   * API returns.
   */
		function BinarySearchTupleLocator(_ref) {
			var viprWidget = _ref.viprWidget;

			_classCallCheck(this, BinarySearchTupleLocator);

			var _this = _possibleConstructorReturn(this, _AbstractTupleLocator.call(this));

			_this.viprWidget = viprWidget;
			return _this;
		}

		/* For JSDocs, see parent class */


		BinarySearchTupleLocator.prototype.findTupleVisualInfo = function findTupleVisualInfo(filter, _ref2) {
			var _this2 = this;

			var includeInfo = _ref2.includeInfo,
			    includePoints = _ref2.includePoints;

			var viprItems = _.flatten(
			//Get all items in an area
			this._getVisAreas().map(function (_ref3) {
				var x = _ref3.x,
				    y = _ref3.y,
				    w = _ref3.w,
				    h = _ref3.h;
				return _this2._getVIDAItemsInRectangle({ x0: x, y0: y, x1: x + w, y1: y + h })
				//Filter items to ones which satisfy specified filter
				.filter(function (item) {
					return _this2._itemSatisfiesFilter({ item: item, filter: filter });
				});
			}));

			return viprItems.map(function (item) {
				var result = {};
				if (includeInfo) {
					result.info = _this2._getValueInfoFromItem(item);
				}
				if (includePoints) {
					result.point = _this2._getPoint(item);
				}
				return result;
			});
		};

		/*
   * Finds the areas (e.g. "visualization", "legend") and their extents which
   * VIPR partitions the entire visualization into.
   *
   * Motivation: It is important to know their extents, as if a
   * getItemsInPolygon query draws a polygon with points straddling multiple
   * areas, VIPR will return no items.
   *
   * @return {object[]} area information will include 'area' (name), 'x', 'y',
   * 'w' and 'h'
   */


		BinarySearchTupleLocator.prototype._getVisAreas = function _getVisAreas() {
			var _this3 = this;

			var bounds = this.viprWidget.domNode.getBoundingClientRect();

			var areaToExtents = {};

			//Assume all areas we care about begin in one of the four corners of the
			//visualization.
			var findAreasFromCorner = function findAreasFromCorner(bx, by) {
				var w0 = bx ? bounds.width - 1 : 0,
				    h0 = by ? bounds.height - 1 : 0;

				var getArea = function getArea(w, h) {
					return _this3.viprWidget.getVisCoordinate(bounds.x + w, bounds.y + h).area;
				};

				//What area is in this corner?
				var area = getArea(w0, h0);

				//'none' is not a useful area; and if we've already found the extents of
				//this area, no need to scan again
				if (area === 'none' || areaToExtents[area]) {
					return;
				}

				var dx = bx ? -1 : 1,
				    dy = by ? -1 : 1;
				var wt = void 0,
				    ht = void 0;

				//Scan x axis to see how wide this area is
				for (wt = w0; 0 <= wt && wt < bounds.width; wt += dx) {
					if (getArea(wt, h0) !== area) {
						break;
					}
				}
				wt -= dx;

				//Scan y axis to see how tall this area is
				for (ht = h0; 0 <= ht && ht < bounds.height; ht += dy) {
					if (getArea(w0, ht) !== area) {
						break;
					}
				}
				ht -= dy;

				//Assume areas are rectangular
				areaToExtents[area] = {
					x: Math.min(w0, wt),
					y: Math.min(h0, ht),
					w: Math.abs(w0 - wt),
					h: Math.abs(h0 - ht)
				};
			};

			//Search for areas in all four corners
			findAreasFromCorner(false, false); //top-left
			findAreasFromCorner(true, false); //top-right
			findAreasFromCorner(false, true); //bottom-left
			findAreasFromCorner(true, true); //bottom-right

			//In general, the only area we use is 'visualization'. If it's not found
			//we won't be able to proceed
			if (!areaToExtents.visualization) {
				throw new Error('Cannot find "visualization" area of widget');
			}

			return Object.keys(areaToExtents).map(function (area) {
				return { extents: areaToExtents[area], area: area };
			}).map(function (_ref4) {
				var extents = _ref4.extents,
				    area = _ref4.area;
				return _extends({}, extents, { area: area });
			});
		};

		/*
   * Simplifies the VIPR getItemsInPolygon API to a rectangle - and takes care
   * of the mapping to VIPR coordinate space via getVisCoordinate.
   * @param {object} coords
   * @param {number} coords.x0 - top-left corner x coordinate
   * @param {number} coords.y0 - top-left corner y coordinate
   * @param {number} coords.x1 - bottom-right corner x coordinate
   * @param {number} coords.y1 - bottom-right corner y coordinate
   */


		BinarySearchTupleLocator.prototype._getVIDAItemsInRectangle = function _getVIDAItemsInRectangle(_ref5) {
			var _this4 = this;

			var x0 = _ref5.x0,
			    y0 = _ref5.y0,
			    x1 = _ref5.x1,
			    y1 = _ref5.y1;

			var origin = this.viprWidget.domNode.getBoundingClientRect();

			//Make a 'rectangle' polygon:
			//	- top-left corner
			//	- top-right corner
			//	- bottom-right corner
			//	- bottom-left corner
			var points = [[x0, y0], [x1, y0], [x1, y1], [x0, y1]].map(function (_ref6) {
				var x = _ref6[0],
				    y = _ref6[1];
				return [x + origin.x, y + origin.y];
			}).map(function (_ref7) {
				var x = _ref7[0],
				    y = _ref7[1];
				return _this4.viprWidget.getVisCoordinate(x, y);
			});

			return this.viprWidget.getItemsInPolygon(points);
		};

		/*
   * Finds a single clickable point which will click an item
   * @param {object} item
   */


		BinarySearchTupleLocator.prototype._getPoint = function _getPoint(item) {
			var _this5 = this;

			//Find which area this item is contained in and extract its extents
			var extent = this._getVisAreas().find(function (_ref8) {
				var x = _ref8.x,
				    y = _ref8.y,
				    w = _ref8.w,
				    h = _ref8.h;
				return _this5._isItemContainedIn(item, { x0: x, y0: y, x1: x + w, y1: y + h });
			});

			if (!extent) {
				throw new Error('Item not found at any position within visualization');
			}

			var x0 = extent.x,
			    y0 = extent.y,
			    x1 = x0 + extent.w,
			    y1 = y0 + extent.h;

			//Find the boundary between where this item does and does not exist in the x axis
			var x = this._binarySearch(x1, x0, function (x) {
				return _this5._isItemContainedIn(item, { x0: x0, y0: y0, x1: x, y1: y1 });
			});

			//Find the boundary between where this item does and does not exist along the strip of x axis found above
			var y = this._binarySearch(y1, y0, function (y) {
				return _this5._isItemContainedIn(item, { x0: x - 1, y0: y0, x1: x, y1: y });
			});

			return {
				selectedNode: this.viprWidget.domNode,
				xOffset: x,
				yOffset: y
			};
		};

		/*
   * Perform a binary search for the boundary between a condition succeeding and failing
   * @param {number} maxPass - the maximum value where the condition is known to pass
   * @param {number} maxFail - the maximum value where the condition is known to fail
   * @param {function} test  - condition
   */


		BinarySearchTupleLocator.prototype._binarySearch = function _binarySearch(maxPass, maxFail, test) {
			while (Math.abs(maxPass - maxFail) > 1) {
				var candidate = Math.round((maxPass + maxFail) / 2);
				if (test(candidate)) {
					maxPass = candidate;
				} else {
					maxFail = candidate;
				}
			}
			return maxPass;
		};

		/*
   * Determines whether the item exists inside a particular rectangle in the visualization
   * @param {object} item
   * @param {object} extents - rectangle
   */


		BinarySearchTupleLocator.prototype._isItemContainedIn = function _isItemContainedIn(item, _ref9) {
			var x0 = _ref9.x0,
			    y0 = _ref9.y0,
			    x1 = _ref9.x1,
			    y1 = _ref9.y1;

			return this._getVIDAItemsInRectangle({ x0: x0, y0: y0, x1: x1, y1: y1 }).some(function (foundItem) {
				return item.key === foundItem.key;
			});
		};

		return BinarySearchTupleLocator;
	}(AbstractTupleLocator);

	return BinarySearchTupleLocator;
});
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