'use strict';

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

/**
 * Licensed Materials - Property of IBM
 * IBM Cognos Products: BI Cloud (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(['jquery', 'underscore', './Absolute', './ScalingAbsolute', '../TemplateHelper', '../../../util/PxPercentUtil', '../../../../app/util/DeepClone'], function ($, _, Absolute, ScalingAbsolute, TemplateHelper, PxPercentUtil) {

	/*
 * The generic page class is an authoring view manager that can switch between relative (scalingAbsolute)
 * and absolute (Absolute) layouts.
 * It isn't a view as it delegates that work off to one of the 2 authoring layout views.
 * There are only a few api's on the view that are utilized directly on the object [destroy() and _addWidget].
 */

	return function () {
		function GenericPage(options) {
			_classCallCheck(this, GenericPage);

			// Cache the options, so that we can switch views at will
			this._options = options;
			var templateHelperOptions = {
				model: options.model,
				layoutController: options.layoutController
			};
			this._options.templateHelper = new TemplateHelper(templateHelperOptions);

			var layoutPositioning = options.model.getValueFromSelfOrParent('layoutPositioning');
			this._switchLayoutView(layoutPositioning);
			this._setPageLayoutStyling(layoutPositioning);

			this._delegateView.model.on('change:layoutPositioning', this._onChangeLayoutPositioning, this);
		}

		/**
   * Called when the view is destroyed
   */


		GenericPage.prototype.destroy = function destroy() {
			this._delegateView.model.off('change:layoutPositioning', this._onChangeLayoutPositioning, this);

			this._delegateView.destroy();

			this._options.templateHelper.destroy();
			this._options.templateHelper = null;
		};

		GenericPage.prototype._switchLayoutView = function _switchLayoutView(layoutPositioning) {
			// Cleanup existing authoring view if present
			if (this._delegateView) {
				this._delegateView.destroy();
			}

			if (layoutPositioning === 'absolute') {
				this._delegateView = new Absolute(this._options);
			} else {
				this._delegateView = new ScalingAbsolute(this._options);
			}
			// Set the author view reference to this generic page, so we can clean up after.
			this._delegateView.consumeView.authorViewManager = this;
		};

		GenericPage.prototype._onChangeLayoutPositioning = function _onChangeLayoutPositioning(payload) {
			this._switchLayoutView(payload.value);
			this._setPageLayoutStyling(payload.value);

			// In the case of undo/redo we have already updated the models
			if (payload.sender !== 'UndoRedoController') {
				this._convertLayoutPositioning(payload);
			}
		};

		// Convert widget/group style values (px->percent or percent->pixel)


		GenericPage.prototype._convertLayoutPositioning = function _convertLayoutPositioning(payload) {
			// Need to know the page size to use for the conversions
			// If the current layout is absolute, then we need to use the current absolute page size to generate the correct
			// widget percentages for the destination page.
			// If the current layout is relative, then we need to use the destination page size (absolute) to generate the correct
			// pixel values in the destination page.
			var pageSize = this._delegateView.getPhysicalPageSize('absolute');

			var items = this._delegateView.model.findDescendantsWithType(['widget', 'group']);
			var childItemsToUpdate = items.map(function (item) {
				var styleCopy = _.deepClone(item.style);
				if (payload.value === 'relative') {
					PxPercentUtil.changePixelPropertiesToPercent(styleCopy, pageSize);
				} else {
					PxPercentUtil.changePercentPropertiesToPixel(styleCopy, pageSize);
				}
				return {
					id: item.id,
					style: styleCopy
				};
			});

			var transactionApi = this._delegateView.dashboardApi.getFeature('Transaction');
			var transactionToken = transactionApi.startTransactionById(payload.data.undoRedoTransactionId);

			var validate = payload.eventName !== 'change:layoutPositioning';
			// Add a hint to the data that the operation is caused by updating the style to percent
			// This is to avoid doing an extra call to 'updateStyleToPercent' as a result of a layout style change
			if (payload.value === 'absolute') {
				_.extend(payload.data, { hint: 'updateStyleToPercent' });
			}
			this._delegateView.updateModel(childItemsToUpdate, transactionToken, validate);

			transactionApi.endTransaction(transactionToken);
		};

		// Switch the styles for the different layout types


		GenericPage.prototype._setPageLayoutStyling = function _setPageLayoutStyling(layoutPositioning) {
			var isRelative = layoutPositioning === 'relative';
			this._delegateView.$el.toggleClass('pagescalingAbsolute', isRelative);
			this._delegateView.$el.toggleClass('pageabsolute', !isRelative);
		};

		return GenericPage;
	}();
});
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