react-images-lightbox/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 _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } };

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

var _propTypes2 = _interopRequireDefault(_propTypes);

var _react = require('react');

var _react2 = _interopRequireDefault(_react);

var _aphroditeNoImportant = 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);

var classes = _aphroditeNoImportant.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);

		_get(Object.getPrototypeOf(PaginatedThumbnails.prototype), 'constructor', this).call(this, props);

		this.state = {
			hasCustomPage: false
		};

		this.gotoPrev = this.gotoPrev.bind(this);
		this.gotoNext = this.gotoNext.bind(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;
			var currentImage = _props.currentImage;
			var 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;
			var images = _props2.images;
			var 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;
			var offset = _props3.offset;
			var 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;
			var images = _props4.images;
			var currentImage = _props4.currentImage;
			var onClickThumbnail = _props4.onClickThumbnail;
			var 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, _aphroditeNoImportant.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
};
module.exports = exports['default'];