mk-react-images/lib/components/PaginatedThumbnails.js

A simple, responsive lightbox component for displaying an array of images with React.js

'use strict';

Object.defineProperty(exports, "__esModule", {
	value: true
});

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; };

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

var _propTypes = require('prop-types');

var _propTypes2 = _interopRequireDefault(_propTypes);

var _react = require('react');

var _react2 = _interopRequireDefault(_react);

var _noImportant = require('aphrodite/no-important');

var _Thumbnail = require('./Thumbnail');

var _Thumbnail2 = _interopRequireDefault(_Thumbnail);

var _Arrow = require('./Arrow');

var _Arrow2 = _interopRequireDefault(_Arrow);

var _theme = require('../theme');

var _theme2 = _interopRequireDefault(_theme);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

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; }

var classes = _noImportant.StyleSheet.create({
	paginatedThumbnails: {
		bottom: _theme2.default.container.gutter.vertical,
		height: _theme2.default.thumbnail.size,
		padding: '0 50px',
		position: 'absolute',
		textAlign: 'center',
		whiteSpace: 'nowrap',
		left: '50%',
		transform: 'translateX(-50%)'
	}
});

var arrowStyles = {
	height: _theme2.default.thumbnail.size + _theme2.default.thumbnail.gutter * 2,
	width: 40
};

var PaginatedThumbnails = function (_Component) {
	_inherits(PaginatedThumbnails, _Component);

	function PaginatedThumbnails(props) {
		_classCallCheck(this, PaginatedThumbnails);

		var _this = _possibleConstructorReturn(this, (PaginatedThumbnails.__proto__ || Object.getPrototypeOf(PaginatedThumbnails)).call(this, props));

		_this.state = {
			hasCustomPage: false
		};

		_this.gotoPrev = _this.gotoPrev.bind(_this);
		_this.gotoNext = _this.gotoNext.bind(_this);
		return _this;
	}

	_createClass(PaginatedThumbnails, [{
		key: 'componentWillReceiveProps',
		value: function componentWillReceiveProps(nextProps) {
			// Component should be controlled, flush state when currentImage changes
			if (nextProps.currentImage !== this.props.currentImage) {
				this.setState({
					hasCustomPage: false
				});
			}
		}

		// ==============================
		// METHODS
		// ==============================

	}, {
		key: 'getFirst',
		value: function getFirst() {
			var _props = this.props,
			    currentImage = _props.currentImage,
			    offset = _props.offset;

			if (this.state.hasCustomPage) {
				return this.clampFirst(this.state.first);
			}
			return this.clampFirst(currentImage - offset);
		}
	}, {
		key: 'setFirst',
		value: function setFirst(event, newFirst) {
			var first = this.state.first;


			if (event) {
				event.preventDefault();
				event.stopPropagation();
			}

			if (first === newFirst) return;

			this.setState({
				hasCustomPage: true,
				first: newFirst
			});
		}
	}, {
		key: 'gotoPrev',
		value: function gotoPrev(event) {
			this.setFirst(event, this.getFirst() - this.props.offset);
		}
	}, {
		key: 'gotoNext',
		value: function gotoNext(event) {
			this.setFirst(event, this.getFirst() + this.props.offset);
		}
	}, {
		key: 'clampFirst',
		value: function clampFirst(value) {
			var _props2 = this.props,
			    images = _props2.images,
			    offset = _props2.offset;


			var totalCount = 2 * offset + 1; // show $offset extra thumbnails on each side

			if (value < 0) {
				return 0;
			} else if (value + totalCount > images.length) {
				// Too far
				return images.length - totalCount;
			} else {
				return value;
			}
		}

		// ==============================
		// RENDERERS
		// ==============================

	}, {
		key: 'renderArrowPrev',
		value: function renderArrowPrev() {
			if (this.getFirst() <= 0) return null;

			return _react2.default.createElement(_Arrow2.default, {
				direction: 'left',
				size: 'small',
				icon: 'arrowLeft',
				onClick: this.gotoPrev,
				style: arrowStyles,
				title: 'Previous (Left arrow key)',
				type: 'button'
			});
		}
	}, {
		key: 'renderArrowNext',
		value: function renderArrowNext() {
			var _props3 = this.props,
			    offset = _props3.offset,
			    images = _props3.images;

			var totalCount = 2 * offset + 1;
			if (this.getFirst() + totalCount >= images.length) return null;

			return _react2.default.createElement(_Arrow2.default, {
				direction: 'right',
				size: 'small',
				icon: 'arrowRight',
				onClick: this.gotoNext,
				style: arrowStyles,
				title: 'Next (Right arrow key)',
				type: 'button'
			});
		}
	}, {
		key: 'render',
		value: function render() {
			var _props4 = this.props,
			    images = _props4.images,
			    currentImage = _props4.currentImage,
			    onClickThumbnail = _props4.onClickThumbnail,
			    offset = _props4.offset;


			var totalCount = 2 * offset + 1; // show $offset extra thumbnails on each side
			var thumbnails = [];
			var baseOffset = 0;
			if (images.length <= totalCount) {
				thumbnails = images;
			} else {
				// Try to center current image in list
				baseOffset = this.getFirst();
				thumbnails = images.slice(baseOffset, baseOffset + totalCount);
			}

			return _react2.default.createElement(
				'div',
				{ className: (0, _noImportant.css)(classes.paginatedThumbnails) },
				this.renderArrowPrev(),
				thumbnails.map(function (img, idx) {
					return _react2.default.createElement(_Thumbnail2.default, _extends({ key: baseOffset + idx
					}, img, {
						index: baseOffset + idx,
						onClick: onClickThumbnail,
						active: baseOffset + idx === currentImage }));
				}),
				this.renderArrowNext()
			);
		}
	}]);

	return PaginatedThumbnails;
}(_react.Component);

exports.default = PaginatedThumbnails;


PaginatedThumbnails.propTypes = {
	currentImage: _propTypes2.default.number,
	images: _propTypes2.default.array,
	offset: _propTypes2.default.number,
	onClickThumbnail: _propTypes2.default.func.isRequired
};