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Current File : /home/forge/spin-robotics.com/node_modules/react-slick/lib/utils/innerSliderUtils.js
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.checkSpecKeys = exports.checkNavigable = exports.changeSlide = exports.canUseDOM = exports.canGoNext = void 0;
exports.clamp = clamp;
exports.swipeStart = exports.swipeMove = exports.swipeEnd = exports.slidesOnRight = exports.slidesOnLeft = exports.slideHandler = exports.siblingDirection = exports.safePreventDefault = exports.lazyStartIndex = exports.lazySlidesOnRight = exports.lazySlidesOnLeft = exports.lazyEndIndex = exports.keyHandler = exports.initializedState = exports.getWidth = exports.getTrackLeft = exports.getTrackCSS = exports.getTrackAnimateCSS = exports.getTotalSlides = exports.getSwipeDirection = exports.getSlideCount = exports.getRequiredLazySlides = exports.getPreClones = exports.getPostClones = exports.getOnDemandLazySlides = exports.getNavigableIndexes = exports.getHeight = exports.extractObject = void 0;

var _react = _interopRequireDefault(require("react"));

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

function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); enumerableOnly && (symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; })), keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = null != arguments[i] ? arguments[i] : {}; i % 2 ? ownKeys(Object(source), !0).forEach(function (key) { _defineProperty(target, key, source[key]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } return target; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

function clamp(number, lowerBound, upperBound) {
  return Math.max(lowerBound, Math.min(number, upperBound));
}

var safePreventDefault = function safePreventDefault(event) {
  var passiveEvents = ["onTouchStart", "onTouchMove", "onWheel"];

  if (!passiveEvents.includes(event._reactName)) {
    event.preventDefault();
  }
};

exports.safePreventDefault = safePreventDefault;

var getOnDemandLazySlides = function getOnDemandLazySlides(spec) {
  var onDemandSlides = [];
  var startIndex = lazyStartIndex(spec);
  var endIndex = lazyEndIndex(spec);

  for (var slideIndex = startIndex; slideIndex < endIndex; slideIndex++) {
    if (spec.lazyLoadedList.indexOf(slideIndex) < 0) {
      onDemandSlides.push(slideIndex);
    }
  }

  return onDemandSlides;
}; // return list of slides that need to be present


exports.getOnDemandLazySlides = getOnDemandLazySlides;

var getRequiredLazySlides = function getRequiredLazySlides(spec) {
  var requiredSlides = [];
  var startIndex = lazyStartIndex(spec);
  var endIndex = lazyEndIndex(spec);

  for (var slideIndex = startIndex; slideIndex < endIndex; slideIndex++) {
    requiredSlides.push(slideIndex);
  }

  return requiredSlides;
}; // startIndex that needs to be present


exports.getRequiredLazySlides = getRequiredLazySlides;

var lazyStartIndex = function lazyStartIndex(spec) {
  return spec.currentSlide - lazySlidesOnLeft(spec);
};

exports.lazyStartIndex = lazyStartIndex;

var lazyEndIndex = function lazyEndIndex(spec) {
  return spec.currentSlide + lazySlidesOnRight(spec);
};

exports.lazyEndIndex = lazyEndIndex;

var lazySlidesOnLeft = function lazySlidesOnLeft(spec) {
  return spec.centerMode ? Math.floor(spec.slidesToShow / 2) + (parseInt(spec.centerPadding) > 0 ? 1 : 0) : 0;
};

exports.lazySlidesOnLeft = lazySlidesOnLeft;

var lazySlidesOnRight = function lazySlidesOnRight(spec) {
  return spec.centerMode ? Math.floor((spec.slidesToShow - 1) / 2) + 1 + (parseInt(spec.centerPadding) > 0 ? 1 : 0) : spec.slidesToShow;
}; // get width of an element


exports.lazySlidesOnRight = lazySlidesOnRight;

var getWidth = function getWidth(elem) {
  return elem && elem.offsetWidth || 0;
};

exports.getWidth = getWidth;

var getHeight = function getHeight(elem) {
  return elem && elem.offsetHeight || 0;
};

exports.getHeight = getHeight;

var getSwipeDirection = function getSwipeDirection(touchObject) {
  var verticalSwiping = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
  var xDist, yDist, r, swipeAngle;
  xDist = touchObject.startX - touchObject.curX;
  yDist = touchObject.startY - touchObject.curY;
  r = Math.atan2(yDist, xDist);
  swipeAngle = Math.round(r * 180 / Math.PI);

  if (swipeAngle < 0) {
    swipeAngle = 360 - Math.abs(swipeAngle);
  }

  if (swipeAngle <= 45 && swipeAngle >= 0 || swipeAngle <= 360 && swipeAngle >= 315) {
    return "left";
  }

  if (swipeAngle >= 135 && swipeAngle <= 225) {
    return "right";
  }

  if (verticalSwiping === true) {
    if (swipeAngle >= 35 && swipeAngle <= 135) {
      return "up";
    } else {
      return "down";
    }
  }

  return "vertical";
}; // whether or not we can go next


exports.getSwipeDirection = getSwipeDirection;

var canGoNext = function canGoNext(spec) {
  var canGo = true;

  if (!spec.infinite) {
    if (spec.centerMode && spec.currentSlide >= spec.slideCount - 1) {
      canGo = false;
    } else if (spec.slideCount <= spec.slidesToShow || spec.currentSlide >= spec.slideCount - spec.slidesToShow) {
      canGo = false;
    }
  }

  return canGo;
}; // given an object and a list of keys, return new object with given keys


exports.canGoNext = canGoNext;

var extractObject = function extractObject(spec, keys) {
  var newObject = {};
  keys.forEach(function (key) {
    return newObject[key] = spec[key];
  });
  return newObject;
}; // get initialized state


exports.extractObject = extractObject;

var initializedState = function initializedState(spec) {
  // spec also contains listRef, trackRef
  var slideCount = _react["default"].Children.count(spec.children);

  var listNode = spec.listRef;
  var listWidth = Math.ceil(getWidth(listNode));
  var trackNode = spec.trackRef && spec.trackRef.node;
  var trackWidth = Math.ceil(getWidth(trackNode));
  var slideWidth;

  if (!spec.vertical) {
    var centerPaddingAdj = spec.centerMode && parseInt(spec.centerPadding) * 2;

    if (typeof spec.centerPadding === "string" && spec.centerPadding.slice(-1) === "%") {
      centerPaddingAdj *= listWidth / 100;
    }

    slideWidth = Math.ceil((listWidth - centerPaddingAdj) / spec.slidesToShow);
  } else {
    slideWidth = listWidth;
  }

  var slideHeight = listNode && getHeight(listNode.querySelector('[data-index="0"]'));
  var listHeight = slideHeight * spec.slidesToShow;
  var currentSlide = spec.currentSlide === undefined ? spec.initialSlide : spec.currentSlide;

  if (spec.rtl && spec.currentSlide === undefined) {
    currentSlide = slideCount - 1 - spec.initialSlide;
  }

  var lazyLoadedList = spec.lazyLoadedList || [];
  var slidesToLoad = getOnDemandLazySlides(_objectSpread(_objectSpread({}, spec), {}, {
    currentSlide: currentSlide,
    lazyLoadedList: lazyLoadedList
  }));
  lazyLoadedList = lazyLoadedList.concat(slidesToLoad);
  var state = {
    slideCount: slideCount,
    slideWidth: slideWidth,
    listWidth: listWidth,
    trackWidth: trackWidth,
    currentSlide: currentSlide,
    slideHeight: slideHeight,
    listHeight: listHeight,
    lazyLoadedList: lazyLoadedList
  };

  if (spec.autoplaying === null && spec.autoplay) {
    state["autoplaying"] = "playing";
  }

  return state;
};

exports.initializedState = initializedState;

var slideHandler = function slideHandler(spec) {
  var waitForAnimate = spec.waitForAnimate,
      animating = spec.animating,
      fade = spec.fade,
      infinite = spec.infinite,
      index = spec.index,
      slideCount = spec.slideCount,
      lazyLoad = spec.lazyLoad,
      currentSlide = spec.currentSlide,
      centerMode = spec.centerMode,
      slidesToScroll = spec.slidesToScroll,
      slidesToShow = spec.slidesToShow,
      useCSS = spec.useCSS;
  var lazyLoadedList = spec.lazyLoadedList;
  if (waitForAnimate && animating) return {};
  var animationSlide = index,
      finalSlide,
      animationLeft,
      finalLeft;
  var state = {},
      nextState = {};
  var targetSlide = infinite ? index : clamp(index, 0, slideCount - 1);

  if (fade) {
    if (!infinite && (index < 0 || index >= slideCount)) return {};

    if (index < 0) {
      animationSlide = index + slideCount;
    } else if (index >= slideCount) {
      animationSlide = index - slideCount;
    }

    if (lazyLoad && lazyLoadedList.indexOf(animationSlide) < 0) {
      lazyLoadedList = lazyLoadedList.concat(animationSlide);
    }

    state = {
      animating: true,
      currentSlide: animationSlide,
      lazyLoadedList: lazyLoadedList,
      targetSlide: animationSlide
    };
    nextState = {
      animating: false,
      targetSlide: animationSlide
    };
  } else {
    finalSlide = animationSlide;

    if (animationSlide < 0) {
      finalSlide = animationSlide + slideCount;
      if (!infinite) finalSlide = 0;else if (slideCount % slidesToScroll !== 0) finalSlide = slideCount - slideCount % slidesToScroll;
    } else if (!canGoNext(spec) && animationSlide > currentSlide) {
      animationSlide = finalSlide = currentSlide;
    } else if (centerMode && animationSlide >= slideCount) {
      animationSlide = infinite ? slideCount : slideCount - 1;
      finalSlide = infinite ? 0 : slideCount - 1;
    } else if (animationSlide >= slideCount) {
      finalSlide = animationSlide - slideCount;
      if (!infinite) finalSlide = slideCount - slidesToShow;else if (slideCount % slidesToScroll !== 0) finalSlide = 0;
    }

    if (!infinite && animationSlide + slidesToShow >= slideCount) {
      finalSlide = slideCount - slidesToShow;
    }

    animationLeft = getTrackLeft(_objectSpread(_objectSpread({}, spec), {}, {
      slideIndex: animationSlide
    }));
    finalLeft = getTrackLeft(_objectSpread(_objectSpread({}, spec), {}, {
      slideIndex: finalSlide
    }));

    if (!infinite) {
      if (animationLeft === finalLeft) animationSlide = finalSlide;
      animationLeft = finalLeft;
    }

    if (lazyLoad) {
      lazyLoadedList = lazyLoadedList.concat(getOnDemandLazySlides(_objectSpread(_objectSpread({}, spec), {}, {
        currentSlide: animationSlide
      })));
    }

    if (!useCSS) {
      state = {
        currentSlide: finalSlide,
        trackStyle: getTrackCSS(_objectSpread(_objectSpread({}, spec), {}, {
          left: finalLeft
        })),
        lazyLoadedList: lazyLoadedList,
        targetSlide: targetSlide
      };
    } else {
      state = {
        animating: true,
        currentSlide: finalSlide,
        trackStyle: getTrackAnimateCSS(_objectSpread(_objectSpread({}, spec), {}, {
          left: animationLeft
        })),
        lazyLoadedList: lazyLoadedList,
        targetSlide: targetSlide
      };
      nextState = {
        animating: false,
        currentSlide: finalSlide,
        trackStyle: getTrackCSS(_objectSpread(_objectSpread({}, spec), {}, {
          left: finalLeft
        })),
        swipeLeft: null,
        targetSlide: targetSlide
      };
    }
  }

  return {
    state: state,
    nextState: nextState
  };
};

exports.slideHandler = slideHandler;

var changeSlide = function changeSlide(spec, options) {
  var indexOffset, previousInt, slideOffset, unevenOffset, targetSlide;
  var slidesToScroll = spec.slidesToScroll,
      slidesToShow = spec.slidesToShow,
      slideCount = spec.slideCount,
      currentSlide = spec.currentSlide,
      previousTargetSlide = spec.targetSlide,
      lazyLoad = spec.lazyLoad,
      infinite = spec.infinite;
  unevenOffset = slideCount % slidesToScroll !== 0;
  indexOffset = unevenOffset ? 0 : (slideCount - currentSlide) % slidesToScroll;

  if (options.message === "previous") {
    slideOffset = indexOffset === 0 ? slidesToScroll : slidesToShow - indexOffset;
    targetSlide = currentSlide - slideOffset;

    if (lazyLoad && !infinite) {
      previousInt = currentSlide - slideOffset;
      targetSlide = previousInt === -1 ? slideCount - 1 : previousInt;
    }

    if (!infinite) {
      targetSlide = previousTargetSlide - slidesToScroll;
    }
  } else if (options.message === "next") {
    slideOffset = indexOffset === 0 ? slidesToScroll : indexOffset;
    targetSlide = currentSlide + slideOffset;

    if (lazyLoad && !infinite) {
      targetSlide = (currentSlide + slidesToScroll) % slideCount + indexOffset;
    }

    if (!infinite) {
      targetSlide = previousTargetSlide + slidesToScroll;
    }
  } else if (options.message === "dots") {
    // Click on dots
    targetSlide = options.index * options.slidesToScroll;
  } else if (options.message === "children") {
    // Click on the slides
    targetSlide = options.index;

    if (infinite) {
      var direction = siblingDirection(_objectSpread(_objectSpread({}, spec), {}, {
        targetSlide: targetSlide
      }));

      if (targetSlide > options.currentSlide && direction === "left") {
        targetSlide = targetSlide - slideCount;
      } else if (targetSlide < options.currentSlide && direction === "right") {
        targetSlide = targetSlide + slideCount;
      }
    }
  } else if (options.message === "index") {
    targetSlide = Number(options.index);
  }

  return targetSlide;
};

exports.changeSlide = changeSlide;

var keyHandler = function keyHandler(e, accessibility, rtl) {
  if (e.target.tagName.match("TEXTAREA|INPUT|SELECT") || !accessibility) return "";
  if (e.keyCode === 37) return rtl ? "next" : "previous";
  if (e.keyCode === 39) return rtl ? "previous" : "next";
  return "";
};

exports.keyHandler = keyHandler;

var swipeStart = function swipeStart(e, swipe, draggable) {
  e.target.tagName === "IMG" && safePreventDefault(e);
  if (!swipe || !draggable && e.type.indexOf("mouse") !== -1) return "";
  return {
    dragging: true,
    touchObject: {
      startX: e.touches ? e.touches[0].pageX : e.clientX,
      startY: e.touches ? e.touches[0].pageY : e.clientY,
      curX: e.touches ? e.touches[0].pageX : e.clientX,
      curY: e.touches ? e.touches[0].pageY : e.clientY
    }
  };
};

exports.swipeStart = swipeStart;

var swipeMove = function swipeMove(e, spec) {
  // spec also contains, trackRef and slideIndex
  var scrolling = spec.scrolling,
      animating = spec.animating,
      vertical = spec.vertical,
      swipeToSlide = spec.swipeToSlide,
      verticalSwiping = spec.verticalSwiping,
      rtl = spec.rtl,
      currentSlide = spec.currentSlide,
      edgeFriction = spec.edgeFriction,
      edgeDragged = spec.edgeDragged,
      onEdge = spec.onEdge,
      swiped = spec.swiped,
      swiping = spec.swiping,
      slideCount = spec.slideCount,
      slidesToScroll = spec.slidesToScroll,
      infinite = spec.infinite,
      touchObject = spec.touchObject,
      swipeEvent = spec.swipeEvent,
      listHeight = spec.listHeight,
      listWidth = spec.listWidth;
  if (scrolling) return;
  if (animating) return safePreventDefault(e);
  if (vertical && swipeToSlide && verticalSwiping) safePreventDefault(e);
  var swipeLeft,
      state = {};
  var curLeft = getTrackLeft(spec);
  touchObject.curX = e.touches ? e.touches[0].pageX : e.clientX;
  touchObject.curY = e.touches ? e.touches[0].pageY : e.clientY;
  touchObject.swipeLength = Math.round(Math.sqrt(Math.pow(touchObject.curX - touchObject.startX, 2)));
  var verticalSwipeLength = Math.round(Math.sqrt(Math.pow(touchObject.curY - touchObject.startY, 2)));

  if (!verticalSwiping && !swiping && verticalSwipeLength > 10) {
    return {
      scrolling: true
    };
  }

  if (verticalSwiping) touchObject.swipeLength = verticalSwipeLength;
  var positionOffset = (!rtl ? 1 : -1) * (touchObject.curX > touchObject.startX ? 1 : -1);
  if (verticalSwiping) positionOffset = touchObject.curY > touchObject.startY ? 1 : -1;
  var dotCount = Math.ceil(slideCount / slidesToScroll);
  var swipeDirection = getSwipeDirection(spec.touchObject, verticalSwiping);
  var touchSwipeLength = touchObject.swipeLength;

  if (!infinite) {
    if (currentSlide === 0 && (swipeDirection === "right" || swipeDirection === "down") || currentSlide + 1 >= dotCount && (swipeDirection === "left" || swipeDirection === "up") || !canGoNext(spec) && (swipeDirection === "left" || swipeDirection === "up")) {
      touchSwipeLength = touchObject.swipeLength * edgeFriction;

      if (edgeDragged === false && onEdge) {
        onEdge(swipeDirection);
        state["edgeDragged"] = true;
      }
    }
  }

  if (!swiped && swipeEvent) {
    swipeEvent(swipeDirection);
    state["swiped"] = true;
  }

  if (!vertical) {
    if (!rtl) {
      swipeLeft = curLeft + touchSwipeLength * positionOffset;
    } else {
      swipeLeft = curLeft - touchSwipeLength * positionOffset;
    }
  } else {
    swipeLeft = curLeft + touchSwipeLength * (listHeight / listWidth) * positionOffset;
  }

  if (verticalSwiping) {
    swipeLeft = curLeft + touchSwipeLength * positionOffset;
  }

  state = _objectSpread(_objectSpread({}, state), {}, {
    touchObject: touchObject,
    swipeLeft: swipeLeft,
    trackStyle: getTrackCSS(_objectSpread(_objectSpread({}, spec), {}, {
      left: swipeLeft
    }))
  });

  if (Math.abs(touchObject.curX - touchObject.startX) < Math.abs(touchObject.curY - touchObject.startY) * 0.8) {
    return state;
  }

  if (touchObject.swipeLength > 10) {
    state["swiping"] = true;
    safePreventDefault(e);
  }

  return state;
};

exports.swipeMove = swipeMove;

var swipeEnd = function swipeEnd(e, spec) {
  var dragging = spec.dragging,
      swipe = spec.swipe,
      touchObject = spec.touchObject,
      listWidth = spec.listWidth,
      touchThreshold = spec.touchThreshold,
      verticalSwiping = spec.verticalSwiping,
      listHeight = spec.listHeight,
      swipeToSlide = spec.swipeToSlide,
      scrolling = spec.scrolling,
      onSwipe = spec.onSwipe,
      targetSlide = spec.targetSlide,
      currentSlide = spec.currentSlide,
      infinite = spec.infinite;

  if (!dragging) {
    if (swipe) safePreventDefault(e);
    return {};
  }

  var minSwipe = verticalSwiping ? listHeight / touchThreshold : listWidth / touchThreshold;
  var swipeDirection = getSwipeDirection(touchObject, verticalSwiping); // reset the state of touch related state variables.

  var state = {
    dragging: false,
    edgeDragged: false,
    scrolling: false,
    swiping: false,
    swiped: false,
    swipeLeft: null,
    touchObject: {}
  };

  if (scrolling) {
    return state;
  }

  if (!touchObject.swipeLength) {
    return state;
  }

  if (touchObject.swipeLength > minSwipe) {
    safePreventDefault(e);

    if (onSwipe) {
      onSwipe(swipeDirection);
    }

    var slideCount, newSlide;
    var activeSlide = infinite ? currentSlide : targetSlide;

    switch (swipeDirection) {
      case "left":
      case "up":
        newSlide = activeSlide + getSlideCount(spec);
        slideCount = swipeToSlide ? checkNavigable(spec, newSlide) : newSlide;
        state["currentDirection"] = 0;
        break;

      case "right":
      case "down":
        newSlide = activeSlide - getSlideCount(spec);
        slideCount = swipeToSlide ? checkNavigable(spec, newSlide) : newSlide;
        state["currentDirection"] = 1;
        break;

      default:
        slideCount = activeSlide;
    }

    state["triggerSlideHandler"] = slideCount;
  } else {
    // Adjust the track back to it's original position.
    var currentLeft = getTrackLeft(spec);
    state["trackStyle"] = getTrackAnimateCSS(_objectSpread(_objectSpread({}, spec), {}, {
      left: currentLeft
    }));
  }

  return state;
};

exports.swipeEnd = swipeEnd;

var getNavigableIndexes = function getNavigableIndexes(spec) {
  var max = spec.infinite ? spec.slideCount * 2 : spec.slideCount;
  var breakpoint = spec.infinite ? spec.slidesToShow * -1 : 0;
  var counter = spec.infinite ? spec.slidesToShow * -1 : 0;
  var indexes = [];

  while (breakpoint < max) {
    indexes.push(breakpoint);
    breakpoint = counter + spec.slidesToScroll;
    counter += Math.min(spec.slidesToScroll, spec.slidesToShow);
  }

  return indexes;
};

exports.getNavigableIndexes = getNavigableIndexes;

var checkNavigable = function checkNavigable(spec, index) {
  var navigables = getNavigableIndexes(spec);
  var prevNavigable = 0;

  if (index > navigables[navigables.length - 1]) {
    index = navigables[navigables.length - 1];
  } else {
    for (var n in navigables) {
      if (index < navigables[n]) {
        index = prevNavigable;
        break;
      }

      prevNavigable = navigables[n];
    }
  }

  return index;
};

exports.checkNavigable = checkNavigable;

var getSlideCount = function getSlideCount(spec) {
  var centerOffset = spec.centerMode ? spec.slideWidth * Math.floor(spec.slidesToShow / 2) : 0;

  if (spec.swipeToSlide) {
    var swipedSlide;
    var slickList = spec.listRef;
    var slides = slickList.querySelectorAll && slickList.querySelectorAll(".slick-slide") || [];
    Array.from(slides).every(function (slide) {
      if (!spec.vertical) {
        if (slide.offsetLeft - centerOffset + getWidth(slide) / 2 > spec.swipeLeft * -1) {
          swipedSlide = slide;
          return false;
        }
      } else {
        if (slide.offsetTop + getHeight(slide) / 2 > spec.swipeLeft * -1) {
          swipedSlide = slide;
          return false;
        }
      }

      return true;
    });

    if (!swipedSlide) {
      return 0;
    }

    var currentIndex = spec.rtl === true ? spec.slideCount - spec.currentSlide : spec.currentSlide;
    var slidesTraversed = Math.abs(swipedSlide.dataset.index - currentIndex) || 1;
    return slidesTraversed;
  } else {
    return spec.slidesToScroll;
  }
};

exports.getSlideCount = getSlideCount;

var checkSpecKeys = function checkSpecKeys(spec, keysArray) {
  return keysArray.reduce(function (value, key) {
    return value && spec.hasOwnProperty(key);
  }, true) ? null : console.error("Keys Missing:", spec);
};

exports.checkSpecKeys = checkSpecKeys;

var getTrackCSS = function getTrackCSS(spec) {
  checkSpecKeys(spec, ["left", "variableWidth", "slideCount", "slidesToShow", "slideWidth"]);
  var trackWidth, trackHeight;
  var trackChildren = spec.slideCount + 2 * spec.slidesToShow;

  if (!spec.vertical) {
    trackWidth = getTotalSlides(spec) * spec.slideWidth;
  } else {
    trackHeight = trackChildren * spec.slideHeight;
  }

  var style = {
    opacity: 1,
    transition: "",
    WebkitTransition: ""
  };

  if (spec.useTransform) {
    var WebkitTransform = !spec.vertical ? "translate3d(" + spec.left + "px, 0px, 0px)" : "translate3d(0px, " + spec.left + "px, 0px)";
    var transform = !spec.vertical ? "translate3d(" + spec.left + "px, 0px, 0px)" : "translate3d(0px, " + spec.left + "px, 0px)";
    var msTransform = !spec.vertical ? "translateX(" + spec.left + "px)" : "translateY(" + spec.left + "px)";
    style = _objectSpread(_objectSpread({}, style), {}, {
      WebkitTransform: WebkitTransform,
      transform: transform,
      msTransform: msTransform
    });
  } else {
    if (spec.vertical) {
      style["top"] = spec.left;
    } else {
      style["left"] = spec.left;
    }
  }

  if (spec.fade) style = {
    opacity: 1
  };
  if (trackWidth) style.width = trackWidth;
  if (trackHeight) style.height = trackHeight; // Fallback for IE8

  if (window && !window.addEventListener && window.attachEvent) {
    if (!spec.vertical) {
      style.marginLeft = spec.left + "px";
    } else {
      style.marginTop = spec.left + "px";
    }
  }

  return style;
};

exports.getTrackCSS = getTrackCSS;

var getTrackAnimateCSS = function getTrackAnimateCSS(spec) {
  checkSpecKeys(spec, ["left", "variableWidth", "slideCount", "slidesToShow", "slideWidth", "speed", "cssEase"]);
  var style = getTrackCSS(spec); // useCSS is true by default so it can be undefined

  if (spec.useTransform) {
    style.WebkitTransition = "-webkit-transform " + spec.speed + "ms " + spec.cssEase;
    style.transition = "transform " + spec.speed + "ms " + spec.cssEase;
  } else {
    if (spec.vertical) {
      style.transition = "top " + spec.speed + "ms " + spec.cssEase;
    } else {
      style.transition = "left " + spec.speed + "ms " + spec.cssEase;
    }
  }

  return style;
};

exports.getTrackAnimateCSS = getTrackAnimateCSS;

var getTrackLeft = function getTrackLeft(spec) {
  if (spec.unslick) {
    return 0;
  }

  checkSpecKeys(spec, ["slideIndex", "trackRef", "infinite", "centerMode", "slideCount", "slidesToShow", "slidesToScroll", "slideWidth", "listWidth", "variableWidth", "slideHeight"]);
  var slideIndex = spec.slideIndex,
      trackRef = spec.trackRef,
      infinite = spec.infinite,
      centerMode = spec.centerMode,
      slideCount = spec.slideCount,
      slidesToShow = spec.slidesToShow,
      slidesToScroll = spec.slidesToScroll,
      slideWidth = spec.slideWidth,
      listWidth = spec.listWidth,
      variableWidth = spec.variableWidth,
      slideHeight = spec.slideHeight,
      fade = spec.fade,
      vertical = spec.vertical;
  var slideOffset = 0;
  var targetLeft;
  var targetSlide;
  var verticalOffset = 0;

  if (fade || spec.slideCount === 1) {
    return 0;
  }

  var slidesToOffset = 0;

  if (infinite) {
    slidesToOffset = -getPreClones(spec); // bring active slide to the beginning of visual area
    // if next scroll doesn't have enough children, just reach till the end of original slides instead of shifting slidesToScroll children

    if (slideCount % slidesToScroll !== 0 && slideIndex + slidesToScroll > slideCount) {
      slidesToOffset = -(slideIndex > slideCount ? slidesToShow - (slideIndex - slideCount) : slideCount % slidesToScroll);
    } // shift current slide to center of the frame


    if (centerMode) {
      slidesToOffset += parseInt(slidesToShow / 2);
    }
  } else {
    if (slideCount % slidesToScroll !== 0 && slideIndex + slidesToScroll > slideCount) {
      slidesToOffset = slidesToShow - slideCount % slidesToScroll;
    }

    if (centerMode) {
      slidesToOffset = parseInt(slidesToShow / 2);
    }
  }

  slideOffset = slidesToOffset * slideWidth;
  verticalOffset = slidesToOffset * slideHeight;

  if (!vertical) {
    targetLeft = slideIndex * slideWidth * -1 + slideOffset;
  } else {
    targetLeft = slideIndex * slideHeight * -1 + verticalOffset;
  }

  if (variableWidth === true) {
    var targetSlideIndex;
    var trackElem = trackRef && trackRef.node;
    targetSlideIndex = slideIndex + getPreClones(spec);
    targetSlide = trackElem && trackElem.childNodes[targetSlideIndex];
    targetLeft = targetSlide ? targetSlide.offsetLeft * -1 : 0;

    if (centerMode === true) {
      targetSlideIndex = infinite ? slideIndex + getPreClones(spec) : slideIndex;
      targetSlide = trackElem && trackElem.children[targetSlideIndex];
      targetLeft = 0;

      for (var slide = 0; slide < targetSlideIndex; slide++) {
        targetLeft -= trackElem && trackElem.children[slide] && trackElem.children[slide].offsetWidth;
      }

      targetLeft -= parseInt(spec.centerPadding);
      targetLeft += targetSlide && (listWidth - targetSlide.offsetWidth) / 2;
    }
  }

  return targetLeft;
};

exports.getTrackLeft = getTrackLeft;

var getPreClones = function getPreClones(spec) {
  if (spec.unslick || !spec.infinite) {
    return 0;
  }

  if (spec.variableWidth) {
    return spec.slideCount;
  }

  return spec.slidesToShow + (spec.centerMode ? 1 : 0);
};

exports.getPreClones = getPreClones;

var getPostClones = function getPostClones(spec) {
  if (spec.unslick || !spec.infinite) {
    return 0;
  }

  return spec.slideCount;
};

exports.getPostClones = getPostClones;

var getTotalSlides = function getTotalSlides(spec) {
  return spec.slideCount === 1 ? 1 : getPreClones(spec) + spec.slideCount + getPostClones(spec);
};

exports.getTotalSlides = getTotalSlides;

var siblingDirection = function siblingDirection(spec) {
  if (spec.targetSlide > spec.currentSlide) {
    if (spec.targetSlide > spec.currentSlide + slidesOnRight(spec)) {
      return "left";
    }

    return "right";
  } else {
    if (spec.targetSlide < spec.currentSlide - slidesOnLeft(spec)) {
      return "right";
    }

    return "left";
  }
};

exports.siblingDirection = siblingDirection;

var slidesOnRight = function slidesOnRight(_ref) {
  var slidesToShow = _ref.slidesToShow,
      centerMode = _ref.centerMode,
      rtl = _ref.rtl,
      centerPadding = _ref.centerPadding;

  // returns no of slides on the right of active slide
  if (centerMode) {
    var right = (slidesToShow - 1) / 2 + 1;
    if (parseInt(centerPadding) > 0) right += 1;
    if (rtl && slidesToShow % 2 === 0) right += 1;
    return right;
  }

  if (rtl) {
    return 0;
  }

  return slidesToShow - 1;
};

exports.slidesOnRight = slidesOnRight;

var slidesOnLeft = function slidesOnLeft(_ref2) {
  var slidesToShow = _ref2.slidesToShow,
      centerMode = _ref2.centerMode,
      rtl = _ref2.rtl,
      centerPadding = _ref2.centerPadding;

  // returns no of slides on the left of active slide
  if (centerMode) {
    var left = (slidesToShow - 1) / 2 + 1;
    if (parseInt(centerPadding) > 0) left += 1;
    if (!rtl && slidesToShow % 2 === 0) left += 1;
    return left;
  }

  if (rtl) {
    return slidesToShow - 1;
  }

  return 0;
};

exports.slidesOnLeft = slidesOnLeft;

var canUseDOM = function canUseDOM() {
  return !!(typeof window !== "undefined" && window.document && window.document.createElement);
};

exports.canUseDOM = canUseDOM;
Youez - 2016 - github.com/yon3zu
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