react-slick/lib/inner-slider.js

React port of slick carousel

'use strict';

exports.__esModule = true;
exports.InnerSlider = undefined;

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 _react = require('react');

var _react2 = _interopRequireDefault(_react);

var _initialState = require('./initial-state');

var _initialState2 = _interopRequireDefault(_initialState);

var _defaultProps = require('./default-props');

var _defaultProps2 = _interopRequireDefault(_defaultProps);

var _createReactClass = require('create-react-class');

var _createReactClass2 = _interopRequireDefault(_createReactClass);

var _classnames = require('classnames');

var _classnames2 = _interopRequireDefault(_classnames);

var _innerSliderUtils = require('./utils/innerSliderUtils');

var _track = require('./track');

var _dots = require('./dots');

var _arrows = require('./arrows');

var _resizeObserverPolyfill = require('resize-observer-polyfill');

var _resizeObserverPolyfill2 = _interopRequireDefault(_resizeObserverPolyfill);

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

function _objectWithoutProperties(obj, keys) { var target = {}; for (var i in obj) { if (keys.indexOf(i) >= 0) continue; if (!Object.prototype.hasOwnProperty.call(obj, i)) continue; target[i] = obj[i]; } 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; }

var InnerSlider = exports.InnerSlider = function (_React$Component) {
  _inherits(InnerSlider, _React$Component);

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

    var _this = _possibleConstructorReturn(this, _React$Component.call(this, props));

    _this.listRefHandler = function (ref) {
      return _this.list = ref;
    };

    _this.trackRefHandler = function (ref) {
      return _this.track = ref;
    };

    _this.adaptHeight = function () {
      if (_this.props.adaptiveHeight && _this.list) {
        var elem = _this.list.querySelector('[data-index="' + _this.state.currentSlide + '"]');
        _this.list.style.height = (0, _innerSliderUtils.getHeight)(elem) + 'px';
      }
    };

    _this.componentWillMount = function () {
      _this.props.onInit && _this.props.onInit();
      if (_this.props.lazyLoad) {
        var slidesToLoad = (0, _innerSliderUtils.getOnDemandLazySlides)(_extends({}, _this.props, _this.state));
        if (slidesToLoad.length > 0) {
          _this.setState(function (prevState, props) {
            return { lazyLoadedList: prevState.lazyLoadedList.concat(slidesToLoad) };
          });
          if (_this.props.onLazyLoad) {
            _this.props.onLazyLoad(slidesToLoad);
          }
        }
      }
    };

    _this.componentDidMount = function () {
      var spec = _extends({ listRef: _this.list, trackRef: _this.track }, _this.props);
      _this.updateState(spec, true, function () {
        _this.adaptHeight();
        _this.props.autoplay && _this.autoPlay('update');
      });
      if (_this.props.lazyLoad === 'progressive') {
        _this.lazyLoadTimer = setInterval(_this.progressiveLazyLoad, 1000);
      }
      _this.ro = new _resizeObserverPolyfill2.default(function (entries) {
        return _this.onWindowResized();
      });
      _this.ro.observe(_this.list);
      Array.from(document.querySelectorAll('.slick-slide')).forEach(function (slide) {
        slide.onfocus = _this.props.pauseOnFocus ? _this.onSlideFocus : null;
        slide.onblur = _this.props.pauseOnFocus ? _this.onSlideBlur : null;
      });
      // To support server-side rendering
      if (!window) {
        return;
      }
      if (window.addEventListener) {
        window.addEventListener('resize', _this.onWindowResized);
      } else {
        window.attachEvent('onresize', _this.onWindowResized);
      }
    };

    _this.componentWillUnmount = function () {
      if (_this.animationEndCallback) {
        clearTimeout(_this.animationEndCallback);
      }
      if (_this.lazyLoadTimer) {
        clearInterval(_this.lazyLoadTimer);
      }
      if (_this.callbackTimers.length) {
        _this.callbackTimers.forEach(function (timer) {
          return clearTimeout(timer);
        });
        _this.callbackTimers = [];
      }
      if (window.addEventListener) {
        window.removeEventListener('resize', _this.onWindowResized);
      } else {
        window.detachEvent('onresize', _this.onWindowResized);
      }
      if (_this.autoplayTimer) {
        clearInterval(_this.autoplayTimer);
      }
    };

    _this.componentWillReceiveProps = function (nextProps) {
      var spec = _extends({ listRef: _this.list, trackRef: _this.track }, nextProps, _this.state);
      _this.updateState(spec, false, function () {
        if (_this.state.currentSlide >= _react2.default.Children.count(nextProps.children)) {
          _this.changeSlide({
            message: 'index',
            index: _react2.default.Children.count(nextProps.children) - nextProps.slidesToShow,
            currentSlide: _this.state.currentSlide
          });
        }
        if (nextProps.autoplay) {
          _this.autoPlay('update');
        } else {
          _this.pause('paused');
        }
      });
    };

    _this.componentDidUpdate = function () {
      _this.checkImagesLoad();
      _this.props.onReInit && _this.props.onReInit();
      if (_this.props.lazyLoad) {
        var slidesToLoad = (0, _innerSliderUtils.getOnDemandLazySlides)(_extends({}, _this.props, _this.state));
        if (slidesToLoad.length > 0) {
          _this.setState(function (prevState, props) {
            return { lazyLoadedList: prevState.lazyLoadedList.concat(slidesToLoad) };
          });
          if (_this.props.onLazyLoad) {
            _this.props.onLazyLoad(slidesToLoad);
          }
        }
      }
      // if (this.props.onLazyLoad) {
      //   this.props.onLazyLoad([leftMostSlide])
      // }
      _this.adaptHeight();
    };

    _this.onWindowResized = function () {
      var spec = _extends({ listRef: _this.list, trackRef: _this.track }, _this.props, _this.state);
      _this.updateState(spec, true, function () {
        if (_this.props.autoplay) _this.autoPlay('update');else _this.pause('paused');
      });
      // animating state should be cleared while resizing, otherwise autoplay stops working
      _this.setState({
        animating: false
      });
      clearTimeout(_this.animationEndCallback);
      delete _this.animationEndCallback;
    };

    _this.updateState = function (spec, setTrackStyle, callback) {
      var updatedState = (0, _innerSliderUtils.initializedState)(spec);
      spec = _extends({}, spec, updatedState, { slideIndex: updatedState.currentSlide });
      var targetLeft = (0, _innerSliderUtils.getTrackLeft)(spec);
      spec = _extends({}, spec, { left: targetLeft });
      var trackStyle = (0, _innerSliderUtils.getTrackCSS)(spec);
      if (setTrackStyle || _react2.default.Children.count(_this.props.children) !== _react2.default.Children.count(spec.children)) {
        updatedState['trackStyle'] = trackStyle;
      }
      _this.setState(updatedState, callback);
    };

    _this.checkImagesLoad = function () {
      var images = document.querySelectorAll('.slick-slide img');
      var imagesCount = images.length,
          loadedCount = 0;
      Array.from(images).forEach(function (image) {
        var handler = function handler() {
          return ++loadedCount && loadedCount >= imagesCount && _this.onWindowResized();
        };
        if (!image.onclick) {
          image.onclick = function () {
            return image.parentNode.focus();
          };
        } else {
          var prevClickHandler = image.onclick;
          image.onclick = function () {
            prevClickHandler();
            image.parentNode.focus();
          };
        }
        if (!image.onload) {
          if (_this.props.lazyLoad) {
            image.onload = function () {
              _this.adaptHeight();
              _this.callbackTimers.push(setTimeout(_this.onWindowResized, _this.props.speed));
            };
          } else {
            image.onload = handler;
            image.onerror = function () {
              handler();
              _this.props.onLazyLoadError && _this.props.onLazyLoadError();
            };
          }
        }
      });
    };

    _this.progressiveLazyLoad = function () {
      var slidesToLoad = [];
      var spec = _extends({}, _this.props, _this.state);
      for (var index = _this.state.currentSlide; index < _this.state.slideCount + (0, _innerSliderUtils.getPostClones)(spec); index++) {
        if (_this.state.lazyLoadedList.indexOf(index) < 0) {
          slidesToLoad.push(index);
          break;
        }
      }
      for (var _index = _this.state.currentSlide - 1; _index >= -(0, _innerSliderUtils.getPreClones)(spec); _index--) {
        if (_this.state.lazyLoadedList.indexOf(_index) < 0) {
          slidesToLoad.push(_index);
          break;
        }
      }
      if (slidesToLoad.length > 0) {
        _this.setState(function (state) {
          return { lazyLoadedList: state.lazyLoadedList.concat(slidesToLoad) };
        });
        if (_this.props.onLazyLoad) {
          _this.props.onLazyLoad(slidesToLoad);
        }
      } else {
        if (_this.lazyLoadTimer) {
          clearInterval(_this.lazyLoadTimer);
          delete _this.lazyLoadTimer;
        }
      }
    };

    _this.slideHandler = function (index) {
      var _this$props = _this.props,
          asNavFor = _this$props.asNavFor,
          currentSlide = _this$props.currentSlide,
          beforeChange = _this$props.beforeChange,
          onLazyLoad = _this$props.onLazyLoad,
          speed = _this$props.speed,
          afterChange = _this$props.afterChange;

      var _slideHandler = (0, _innerSliderUtils.slideHandler)(_extends({ index: index }, _this.props, _this.state, { trackRef: _this.track })),
          state = _slideHandler.state,
          nextState = _slideHandler.nextState;

      if (!state) return;
      beforeChange && beforeChange(currentSlide, state.currentSlide);
      var slidesToLoad = state.lazyLoadedList.filter(function (value) {
        return _this.state.lazyLoadedList.indexOf(value) < 0;
      });
      onLazyLoad && slidesToLoad.length > 0 && onLazyLoad(slidesToLoad);
      _this.setState(state, function () {
        asNavFor && asNavFor.innerSlider.state.currentSlide !== currentSlide && asNavFor.innerSlider.slideHandler(index);
        _this.animationEndCallback = setTimeout(function () {
          var animating = nextState.animating,
              firstBatch = _objectWithoutProperties(nextState, ['animating']);

          _this.setState(firstBatch, function () {
            _this.callbackTimers.push(setTimeout(function () {
              return _this.setState({ animating: animating });
            }, 10));
            afterChange && afterChange(state.currentSlide);
            delete _this.animationEndCallback;
          });
        }, speed);
      });
    };

    _this.changeSlide = function (options) {
      var spec = _extends({}, _this.props, _this.state);
      var targetSlide = (0, _innerSliderUtils.changeSlide)(spec, options);
      if (targetSlide !== 0 && !targetSlide) return;
      _this.slideHandler(targetSlide);
    };

    _this.keyHandler = function (e) {
      var dir = (0, _innerSliderUtils.keyHandler)(e, _this.props.accessibility, _this.props.rtl);
      dir !== '' && _this.changeSlide({ message: dir });
    };

    _this.selectHandler = function (options) {
      _this.changeSlide(options);
    };

    _this.swipeStart = function (e) {
      var state = (0, _innerSliderUtils.swipeStart)(e, _this.props.swipe, _this.props.draggable);
      state !== '' && _this.setState(state);
    };

    _this.swipeMove = function (e) {
      var state = (0, _innerSliderUtils.swipeMove)(e, _extends({}, _this.props, _this.state, {
        trackRef: _this.track,
        listRef: _this.list,
        slideIndex: _this.state.currentSlide
      }));
      if (!state) return;
      _this.setState(state);
    };

    _this.swipeEnd = function (e) {
      var state = (0, _innerSliderUtils.swipeEnd)(e, _extends({}, _this.props, _this.state, {
        trackRef: _this.track,
        listRef: _this.list,
        slideIndex: _this.state.currentSlide
      }));
      if (!state) return;
      var triggerSlideHandler = state['triggerSlideHandler'];
      delete state['triggerSlideHandler'];
      _this.setState(state);
      if (triggerSlideHandler === undefined) return;
      _this.slideHandler(triggerSlideHandler);
    };

    _this.slickPrev = function () {
      // this and fellow methods are wrapped in setTimeout
      // to make sure initialize setState has happened before
      // any of such methods are called
      _this.callbackTimers.push(setTimeout(function () {
        return _this.changeSlide({ message: 'previous' });
      }, 0));
    };

    _this.slickNext = function () {
      _this.callbackTimers.push(setTimeout(function () {
        return _this.changeSlide({ message: 'next' });
      }, 0));
    };

    _this.slickGoTo = function (slide) {
      slide = Number(slide);
      if (isNan(slide)) return '';
      _this.callbackTimers.push(setTimeout(function () {
        return _this.changeSlide({
          message: 'index',
          index: slide,
          currentSlide: _this.state.currentSlide
        });
      }, 0));
    };

    _this.play = function () {
      var nextIndex;
      if (_this.props.rtl) {
        nextIndex = _this.state.currentSlide - _this.props.slidesToScroll;
      } else {
        if ((0, _innerSliderUtils.canGoNext)(_extends({}, _this.props, _this.state))) {
          nextIndex = _this.state.currentSlide + _this.props.slidesToScroll;
        } else {
          return false;
        }
      }

      _this.slideHandler(nextIndex);
    };

    _this.autoPlay = function (playType) {
      if (_this.autoplayTimer) {
        console.warn("autoPlay is triggered more than once");
        clearInterval(_this.autoplayTimer);
      }
      var autoplaying = _this.state.autoplaying;
      if (playType === 'update') {
        if (autoplaying === 'hovered' || autoplaying === 'focused' || autoplaying === 'paused') {
          return;
        }
      } else if (playType === 'leave') {
        if (autoplaying === 'paused' || autoplaying === 'focused') {
          return;
        }
      } else if (playType === 'blur') {
        if (autoplaying === 'paused' || autoplaying === 'hovered') {
          return;
        }
      }
      _this.autoplayTimer = setInterval(_this.play, _this.props.autoplaySpeed + 50);
      _this.setState({ autoplaying: 'playing' });
    };

    _this.pause = function (pauseType) {
      if (_this.autoplayTimer) {
        clearInterval(_this.autoplayTimer);
        _this.autoplayTimer = null;
      }
      var autoplaying = _this.state.autoplaying;
      if (pauseType === 'paused') {
        _this.setState({ autoplaying: 'paused' });
      } else if (pauseType === 'focused') {
        if (autoplaying === 'hovered' || autoplaying === 'playing') {
          _this.setState({ autoplaying: 'focused' });
        }
      } else {
        // pauseType  is 'hovered'
        if (autoplaying === 'playing') {
          _this.setState({ autoplaying: 'hovered' });
        }
      }
    };

    _this.onDotsOver = function (e) {
      return _this.props.autoplay && _this.pause('hovered');
    };

    _this.onDotsLeave = function (e) {
      return _this.props.autoplay && _this.state.autoplaying === 'hovered' && _this.autoPlay('leave');
    };

    _this.onTrackOver = function (e) {
      return _this.props.autoplay && _this.pause('hovered');
    };

    _this.onTrackLeave = function (e) {
      return _this.props.autoplay && _this.state.autoplaying === 'hovered' && _this.autoPlay('leave');
    };

    _this.onSlideFocus = function (e) {
      return _this.props.autoplay && _this.pause('focused');
    };

    _this.onSlideBlur = function (e) {
      return _this.props.autoplay && _this.state.autoplaying === 'focused' && _this.autoPlay('blur');
    };

    _this.render = function () {
      var className = (0, _classnames2.default)('regular', 'slider', 'slick-initialized', 'slick-slider', _this.props.className, {
        'slick-vertical': _this.props.vertical
      });
      var spec = _extends({}, _this.props, _this.state);
      var trackProps = (0, _innerSliderUtils.extractObject)(spec, ['fade', 'cssEase', 'speed', 'infinite', 'centerMode', 'focusOnSelect', 'currentSlide', 'lazyLoad', 'lazyLoadedList', 'rtl', 'slideWidth', 'slideHeight', 'listHeight', 'vertical', 'slidesToShow', 'slidesToScroll', 'slideCount', 'trackStyle', 'variableWidth', 'unslick', 'centerPadding']);
      var pauseOnHover = _this.props.pauseOnHover;

      trackProps = _extends({}, trackProps, {
        onMouseEnter: pauseOnHover ? _this.onTrackOver : null,
        onMouseLeave: pauseOnHover ? _this.onTrackLeave : null,
        onMouseOver: pauseOnHover ? _this.onTrackOver : null,
        focusOnSelect: _this.props.focusOnSelect ? _this.selectHandler : null
      });

      var dots;
      if (_this.props.dots === true && _this.state.slideCount >= _this.props.slidesToShow) {
        var dotProps = (0, _innerSliderUtils.extractObject)(spec, ['dotsClass', 'slideCount', 'slidesToShow', 'currentSlide', 'slidesToScroll', 'clickHandler', 'children', 'customPaging', 'infinite', 'appendDots']);
        var pauseOnDotsHover = _this.props.pauseOnDotsHover;

        dotProps = _extends({}, dotProps, {
          clickHandler: _this.changeSlide,
          onMouseEnter: pauseOnDotsHover ? _this.onDotsLeave : null,
          onMouseOver: pauseOnDotsHover ? _this.onDotsOver : null,
          onMouseLeave: pauseOnDotsHover ? _this.onDotsLeave : null
        });
        dots = _react2.default.createElement(_dots.Dots, dotProps);
      }

      var prevArrow, nextArrow;
      var arrowProps = (0, _innerSliderUtils.extractObject)(spec, ['infinite', 'centerMode', 'currentSlide', 'slideCount', 'slidesToShow', 'prevArrow', 'nextArrow']);
      arrowProps.clickHandler = _this.changeSlide;

      if (_this.props.arrows) {
        prevArrow = _react2.default.createElement(_arrows.PrevArrow, arrowProps);
        nextArrow = _react2.default.createElement(_arrows.NextArrow, arrowProps);
      }

      var verticalHeightStyle = null;

      if (_this.props.vertical) {
        verticalHeightStyle = {
          height: _this.state.listHeight
        };
      }

      var centerPaddingStyle = null;

      if (_this.props.vertical === false) {
        if (_this.props.centerMode === true) {
          centerPaddingStyle = {
            padding: '0px ' + _this.props.centerPadding
          };
        }
      } else {
        if (_this.props.centerMode === true) {
          centerPaddingStyle = {
            padding: _this.props.centerPadding + ' 0px'
          };
        }
      }

      var listStyle = _extends({}, verticalHeightStyle, centerPaddingStyle);
      var touchMove = _this.props.touchMove;
      var listProps = {
        className: 'slick-list',
        style: listStyle,
        onMouseDown: touchMove ? _this.swipeStart : null,
        onMouseMove: _this.state.dragging && touchMove ? _this.swipeMove : null,
        onMouseUp: touchMove ? _this.swipeEnd : null,
        onMouseLeave: _this.state.dragging && touchMove ? _this.swipeEnd : null,
        onTouchStart: touchMove ? _this.swipeStart : null,
        onTouchMove: _this.state.dragging && touchMove ? _this.swipeMove : null,
        onTouchEnd: touchMove ? _this.swipeEnd : null,
        onTouchCancel: _this.state.dragging && touchMove ? _this.swipeEnd : null,
        onKeyDown: _this.props.accessibility ? _this.keyHandler : null
      };

      var innerSliderProps = {
        className: className,
        dir: 'ltr'
      };

      if (_this.props.unslick) {
        listProps = { className: 'slick-list' };
        innerSliderProps = { className: className };
      }

      return _react2.default.createElement(
        'div',
        innerSliderProps,
        !_this.props.unslick ? prevArrow : '',
        _react2.default.createElement(
          'div',
          _extends({ ref: _this.listRefHandler }, listProps),
          _react2.default.createElement(
            _track.Track,
            _extends({ ref: _this.trackRefHandler }, trackProps),
            _this.props.children
          )
        ),
        !_this.props.unslick ? nextArrow : '',
        !_this.props.unslick ? dots : ''
      );
    };

    _this.list = null;
    _this.track = null;
    _this.state = _extends({}, _initialState2.default, {
      currentSlide: _this.props.initialSlide
    });
    _this.callbackTimers = [];
    return _this;
  }

  return InnerSlider;
}(_react2.default.Component);