{"version":3,"file":"ChildMapping.mjs","sources":["../../../../../../../../node_modules/react-transition-group/esm/utils/ChildMapping.js"],"sourcesContent":["import { Children, cloneElement, isValidElement } from 'react';\n/**\n * Given `this.props.children`, return an object mapping key to child.\n *\n * @param {*} children `this.props.children`\n * @return {object} Mapping of key to child\n */\n\nexport function getChildMapping(children, mapFn) {\n  var mapper = function mapper(child) {\n    return mapFn && isValidElement(child) ? mapFn(child) : child;\n  };\n\n  var result = Object.create(null);\n  if (children) Children.map(children, function (c) {\n    return c;\n  }).forEach(function (child) {\n    // run the map function here instead so that the key is the computed one\n    result[child.key] = mapper(child);\n  });\n  return result;\n}\n/**\n * When you're adding or removing children some may be added or removed in the\n * same render pass. We want to show *both* since we want to simultaneously\n * animate elements in and out. This function takes a previous set of keys\n * and a new set of keys and merges them with its best guess of the correct\n * ordering. In the future we may expose some of the utilities in\n * ReactMultiChild to make this easy, but for now React itself does not\n * directly have this concept of the union of prevChildren and nextChildren\n * so we implement it here.\n *\n * @param {object} prev prev children as returned from\n * `ReactTransitionChildMapping.getChildMapping()`.\n * @param {object} next next children as returned from\n * `ReactTransitionChildMapping.getChildMapping()`.\n * @return {object} a key set that contains all keys in `prev` and all keys\n * in `next` in a reasonable order.\n */\n\nexport function mergeChildMappings(prev, next) {\n  prev = prev || {};\n  next = next || {};\n\n  function getValueForKey(key) {\n    return key in next ? next[key] : prev[key];\n  } // For each key of `next`, the list of keys to insert before that key in\n  // the combined list\n\n\n  var nextKeysPending = Object.create(null);\n  var pendingKeys = [];\n\n  for (var prevKey in prev) {\n    if (prevKey in next) {\n      if (pendingKeys.length) {\n        nextKeysPending[prevKey] = pendingKeys;\n        pendingKeys = [];\n      }\n    } else {\n      pendingKeys.push(prevKey);\n    }\n  }\n\n  var i;\n  var childMapping = {};\n\n  for (var nextKey in next) {\n    if (nextKeysPending[nextKey]) {\n      for (i = 0; i < nextKeysPending[nextKey].length; i++) {\n        var pendingNextKey = nextKeysPending[nextKey][i];\n        childMapping[nextKeysPending[nextKey][i]] = getValueForKey(pendingNextKey);\n      }\n    }\n\n    childMapping[nextKey] = getValueForKey(nextKey);\n  } // Finally, add the keys which didn't appear before any key in `next`\n\n\n  for (i = 0; i < pendingKeys.length; i++) {\n    childMapping[pendingKeys[i]] = getValueForKey(pendingKeys[i]);\n  }\n\n  return childMapping;\n}\n\nfunction getProp(child, prop, props) {\n  return props[prop] != null ? props[prop] : child.props[prop];\n}\n\nexport function getInitialChildMapping(props, onExited) {\n  return getChildMapping(props.children, function (child) {\n    return cloneElement(child, {\n      onExited: onExited.bind(null, child),\n      in: true,\n      appear: getProp(child, 'appear', props),\n      enter: getProp(child, 'enter', props),\n      exit: getProp(child, 'exit', props)\n    });\n  });\n}\nexport function getNextChildMapping(nextProps, prevChildMapping, onExited) {\n  var nextChildMapping = getChildMapping(nextProps.children);\n  var children = mergeChildMappings(prevChildMapping, nextChildMapping);\n  Object.keys(children).forEach(function (key) {\n    var child = children[key];\n    if (!isValidElement(child)) return;\n    var hasPrev = (key in prevChildMapping);\n    var hasNext = (key in nextChildMapping);\n    var prevChild = prevChildMapping[key];\n    var isLeaving = isValidElement(prevChild) && !prevChild.props.in; // item is new (entering)\n\n    if (hasNext && (!hasPrev || isLeaving)) {\n      // console.log('entering', key)\n      children[key] = cloneElement(child, {\n        onExited: onExited.bind(null, child),\n        in: true,\n        exit: getProp(child, 'exit', nextProps),\n        enter: getProp(child, 'enter', nextProps)\n      });\n    } else if (!hasNext && hasPrev && !isLeaving) {\n      // item is old (exiting)\n      // console.log('leaving', key)\n      children[key] = cloneElement(child, {\n        in: false\n      });\n    } else if (hasNext && hasPrev && isValidElement(prevChild)) {\n      // item hasn't changed transition states\n      // copy over the last transition props;\n      // console.log('unchanged', key)\n      children[key] = cloneElement(child, {\n        onExited: onExited.bind(null, child),\n        in: prevChild.props.in,\n        exit: getProp(child, 'exit', nextProps),\n        enter: getProp(child, 'enter', nextProps)\n      });\n    }\n  });\n  return children;\n}"],"names":[],"mappings":";;AACA;AACA;AACA;AACA;AACA;AACA;;AAEO,SAAS,eAAe,CAAC,QAAQ,EAAE,KAAK,EAAE;AACjD,EAAE,IAAI,MAAM,GAAG,SAAS,MAAM,CAAC,KAAK,EAAE;AACtC,IAAI,OAAO,KAAK,IAAI,cAAc,CAAC,KAAK,CAAC,GAAG,KAAK,CAAC,KAAK,CAAC,GAAG,KAAK;AAChE,EAAE,CAAC;;AAEH,EAAE,IAAI,MAAM,GAAG,MAAM,CAAC,MAAM,CAAC,IAAI,CAAC;AAClC,EAAE,IAAI,QAAQ,EAAE,QAAQ,CAAC,GAAG,CAAC,QAAQ,EAAE,UAAU,CAAC,EAAE;AACpD,IAAI,OAAO,CAAC;AACZ,EAAE,CAAC,CAAC,CAAC,OAAO,CAAC,UAAU,KAAK,EAAE;AAC9B;AACA,IAAI,MAAM,CAAC,KAAK,CAAC,GAAG,CAAC,GAAG,MAAM,CAAC,KAAK,CAAC;AACrC,EAAE,CAAC,CAAC;AACJ,EAAE,OAAO,MAAM;AACf;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;;AAEO,SAAS,kBAAkB,CAAC,IAAI,EAAE,IAAI,EAAE;AAC/C,EAAE,IAAI,GAAG,IAAI,IAAI,EAAE;AACnB,EAAE,IAAI,GAAG,IAAI,IAAI,EAAE;;AAEnB,EAAE,SAAS,cAAc,CAAC,GAAG,EAAE;AAC/B,IAAI,OAAO,GAAG,IAAI,IAAI,GAAG,IAAI,CAAC,GAAG,CAAC,GAAG,IAAI,CAAC,GAAG,CAAC;AAC9C,EAAE,CAAC;AACH;;;AAGA,EAAE,IAAI,eAAe,GAAG,MAAM,CAAC,MAAM,CAAC,IAAI,CAAC;AAC3C,EAAE,IAAI,WAAW,GAAG,EAAE;;AAEtB,EAAE,KAAK,IAAI,OAAO,IAAI,IAAI,EAAE;AAC5B,IAAI,IAAI,OAAO,IAAI,IAAI,EAAE;AACzB,MAAM,IAAI,WAAW,CAAC,MAAM,EAAE;AAC9B,QAAQ,eAAe,CAAC,OAAO,CAAC,GAAG,WAAW;AAC9C,QAAQ,WAAW,GAAG,EAAE;AACxB,MAAM;AACN,IAAI,CAAC,MAAM;AACX,MAAM,WAAW,CAAC,IAAI,CAAC,OAAO,CAAC;AAC/B,IAAI;AACJ,EAAE;;AAEF,EAAE,IAAI,CAAC;AACP,EAAE,IAAI,YAAY,GAAG,EAAE;;AAEvB,EAAE,KAAK,IAAI,OAAO,IAAI,IAAI,EAAE;AAC5B,IAAI,IAAI,eAAe,CAAC,OAAO,CAAC,EAAE;AAClC,MAAM,KAAK,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,eAAe,CAAC,OAAO,CAAC,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE;AAC5D,QAAQ,IAAI,cAAc,GAAG,eAAe,CAAC,OAAO,CAAC,CAAC,CAAC,CAAC;AACxD,QAAQ,YAAY,CAAC,eAAe,CAAC,OAAO,CAAC,CAAC,CAAC,CAAC,CAAC,GAAG,cAAc,CAAC,cAAc,CAAC;AAClF,MAAM;AACN,IAAI;;AAEJ,IAAI,YAAY,CAAC,OAAO,CAAC,GAAG,cAAc,CAAC,OAAO,CAAC;AACnD,EAAE,CAAC;;;AAGH,EAAE,KAAK,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,WAAW,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE;AAC3C,IAAI,YAAY,CAAC,WAAW,CAAC,CAAC,CAAC,CAAC,GAAG,cAAc,CAAC,WAAW,CAAC,CAAC,CAAC,CAAC;AACjE,EAAE;;AAEF,EAAE,OAAO,YAAY;AACrB;;AAEA,SAAS,OAAO,CAAC,KAAK,EAAE,IAAI,EAAE,KAAK,EAAE;AACrC,EAAE,OAAO,KAAK,CAAC,IAAI,CAAC,IAAI,IAAI,GAAG,KAAK,CAAC,IAAI,CAAC,GAAG,KAAK,CAAC,KAAK,CAAC,IAAI,CAAC;AAC9D;;AAEO,SAAS,sBAAsB,CAAC,KAAK,EAAE,QAAQ,EAAE;AACxD,EAAE,OAAO,eAAe,CAAC,KAAK,CAAC,QAAQ,EAAE,UAAU,KAAK,EAAE;AAC1D,IAAI,OAAO,YAAY,CAAC,KAAK,EAAE;AAC/B,MAAM,QAAQ,EAAE,QAAQ,CAAC,IAAI,CAAC,IAAI,EAAE,KAAK,CAAC;AAC1C,MAAM,EAAE,EAAE,IAAI;AACd,MAAM,MAAM,EAAE,OAAO,CAAC,KAAK,EAAE,QAAQ,EAAE,KAAK,CAAC;AAC7C,MAAM,KAAK,EAAE,OAAO,CAAC,KAAK,EAAE,OAAO,EAAE,KAAK,CAAC;AAC3C,MAAM,IAAI,EAAE,OAAO,CAAC,KAAK,EAAE,MAAM,EAAE,KAAK;AACxC,KAAK,CAAC;AACN,EAAE,CAAC,CAAC;AACJ;AACO,SAAS,mBAAmB,CAAC,SAAS,EAAE,gBAAgB,EAAE,QAAQ,EAAE;AAC3E,EAAE,IAAI,gBAAgB,GAAG,eAAe,CAAC,SAAS,CAAC,QAAQ,CAAC;AAC5D,EAAE,IAAI,QAAQ,GAAG,kBAAkB,CAAC,gBAAgB,EAAE,gBAAgB,CAAC;AACvE,EAAE,MAAM,CAAC,IAAI,CAAC,QAAQ,CAAC,CAAC,OAAO,CAAC,UAAU,GAAG,EAAE;AAC/C,IAAI,IAAI,KAAK,GAAG,QAAQ,CAAC,GAAG,CAAC;AAC7B,IAAI,IAAI,CAAC,cAAc,CAAC,KAAK,CAAC,EAAE;AAChC,IAAI,IAAI,OAAO,IAAI,GAAG,IAAI,gBAAgB,CAAC;AAC3C,IAAI,IAAI,OAAO,IAAI,GAAG,IAAI,gBAAgB,CAAC;AAC3C,IAAI,IAAI,SAAS,GAAG,gBAAgB,CAAC,GAAG,CAAC;AACzC,IAAI,IAAI,SAAS,GAAG,cAAc,CAAC,SAAS,CAAC,IAAI,CAAC,SAAS,CAAC,KAAK,CAAC,EAAE,CAAC;;AAErE,IAAI,IAAI,OAAO,KAAK,CAAC,OAAO,IAAI,SAAS,CAAC,EAAE;AAC5C;AACA,MAAM,QAAQ,CAAC,GAAG,CAAC,GAAG,YAAY,CAAC,KAAK,EAAE;AAC1C,QAAQ,QAAQ,EAAE,QAAQ,CAAC,IAAI,CAAC,IAAI,EAAE,KAAK,CAAC;AAC5C,QAAQ,EAAE,EAAE,IAAI;AAChB,QAAQ,IAAI,EAAE,OAAO,CAAC,KAAK,EAAE,MAAM,EAAE,SAAS,CAAC;AAC/C,QAAQ,KAAK,EAAE,OAAO,CAAC,KAAK,EAAE,OAAO,EAAE,SAAS;AAChD,OAAO,CAAC;AACR,IAAI,CAAC,MAAM,IAAI,CAAC,OAAO,IAAI,OAAO,IAAI,CAAC,SAAS,EAAE;AAClD;AACA;AACA,MAAM,QAAQ,CAAC,GAAG,CAAC,GAAG,YAAY,CAAC,KAAK,EAAE;AAC1C,QAAQ,EAAE,EAAE;AACZ,OAAO,CAAC;AACR,IAAI,CAAC,MAAM,IAAI,OAAO,IAAI,OAAO,IAAI,cAAc,CAAC,SAAS,CAAC,EAAE;AAChE;AACA;AACA;AACA,MAAM,QAAQ,CAAC,GAAG,CAAC,GAAG,YAAY,CAAC,KAAK,EAAE;AAC1C,QAAQ,QAAQ,EAAE,QAAQ,CAAC,IAAI,CAAC,IAAI,EAAE,KAAK,CAAC;AAC5C,QAAQ,EAAE,EAAE,SAAS,CAAC,KAAK,CAAC,EAAE;AAC9B,QAAQ,IAAI,EAAE,OAAO,CAAC,KAAK,EAAE,MAAM,EAAE,SAAS,CAAC;AAC/C,QAAQ,KAAK,EAAE,OAAO,CAAC,KAAK,EAAE,OAAO,EAAE,SAAS;AAChD,OAAO,CAAC;AACR,IAAI;AACJ,EAAE,CAAC,CAAC;AACJ,EAAE,OAAO,QAAQ;AACjB;;;;","x_google_ignoreList":[0]}