@aimake/nanod/lib/anchor/Anchor.js

## 设计模式 NANO DESIGN 是面向于企业级中台化应用的解决方案。服务于 ToB 和 ToE 类型的单页应用，应用于各产品中从而产出了一套设计及前端规范。

"use strict";

var _typeof3 = require("babel-runtime/helpers/typeof");

var _typeof4 = _interopRequireDefault2(_typeof3);

function _interopRequireDefault2(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = void 0;

var React = _interopRequireWildcard(require("react"));

var ReactDOM = _interopRequireWildcard(require("react-dom"));

var PropTypes = _interopRequireWildcard(require("prop-types"));

var _classnames = _interopRequireDefault(require("classnames"));

var _addEventListener = _interopRequireDefault(require("rc-util/lib/Dom/addEventListener"));

var _affix = _interopRequireDefault(require("../affix"));

var _configProvider = require("../config-provider");

var _getScroll = _interopRequireDefault(require("../_util/getScroll"));

var _raf = _interopRequireDefault(require("raf"));

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

function _interopRequireWildcard(obj) {
  if (obj && obj.__esModule) {
    return obj;
  } else {
    var newObj = {};if (obj != null) {
      for (var key in obj) {
        if (Object.prototype.hasOwnProperty.call(obj, key)) {
          var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {};if (desc.get || desc.set) {
            Object.defineProperty(newObj, key, desc);
          } else {
            newObj[key] = obj[key];
          }
        }
      }
    }newObj["default"] = obj;return newObj;
  }
}

function _typeof(obj) {
  if (typeof Symbol === "function" && (0, _typeof4["default"])(Symbol.iterator) === "symbol") {
    _typeof = function _typeof(obj) {
      return typeof obj === "undefined" ? "undefined" : (0, _typeof4["default"])(obj);
    };
  } else {
    _typeof = function _typeof(obj) {
      return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj === "undefined" ? "undefined" : (0, _typeof4["default"])(obj);
    };
  }return _typeof(obj);
}

function _extends() {
  _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;
  };return _extends.apply(this, arguments);
}

function _classCallCheck(instance, Constructor) {
  if (!(instance instanceof Constructor)) {
    throw new TypeError("Cannot call a class as a 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);
  }
}

function _createClass(Constructor, protoProps, staticProps) {
  if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;
}

function _possibleConstructorReturn(self, call) {
  if (call && (_typeof(call) === "object" || typeof call === "function")) {
    return call;
  }return _assertThisInitialized(self);
}

function _getPrototypeOf(o) {
  _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
    return o.__proto__ || Object.getPrototypeOf(o);
  };return _getPrototypeOf(o);
}

function _inherits(subClass, superClass) {
  if (typeof superClass !== "function" && superClass !== null) {
    throw new TypeError("Super expression must either be null or a function");
  }subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } });if (superClass) _setPrototypeOf(subClass, superClass);
}

function _setPrototypeOf(o, p) {
  _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
    o.__proto__ = p;return o;
  };return _setPrototypeOf(o, p);
}

function _assertThisInitialized(self) {
  if (self === void 0) {
    throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
  }return self;
}

function getDefaultContainer() {
  return window;
}

function getOffsetTop(element, container) {
  if (!element) {
    return 0;
  }

  if (!element.getClientRects().length) {
    return 0;
  }

  var rect = element.getBoundingClientRect();

  if (rect.width || rect.height) {
    if (container === window) {
      container = element.ownerDocument.documentElement;
      return rect.top - container.clientTop;
    }

    return rect.top - container.getBoundingClientRect().top;
  }

  return rect.top;
}

function easeInOutCubic(t, b, c, d) {
  var cc = c - b;
  t /= d / 2;

  if (t < 1) {
    return cc / 2 * t * t * t + b;
  }

  return cc / 2 * ((t -= 2) * t * t + 2) + b;
}

var sharpMatcherRegx = /#([^#]+)$/;

function scrollTo(href) {
  var offsetTop = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;
  var getContainer = arguments.length > 2 ? arguments[2] : undefined;
  var callback = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : function () {};
  var container = getContainer();
  var scrollTop = (0, _getScroll["default"])(container, true);
  var sharpLinkMatch = sharpMatcherRegx.exec(href);

  if (!sharpLinkMatch) {
    return;
  }

  var targetElement = document.getElementById(sharpLinkMatch[1]);

  if (!targetElement) {
    return;
  }

  var eleOffsetTop = getOffsetTop(targetElement, container);
  var targetScrollTop = scrollTop + eleOffsetTop - offsetTop;
  var startTime = Date.now();

  var frameFunc = function frameFunc() {
    var timestamp = Date.now();
    var time = timestamp - startTime;
    var nextScrollTop = easeInOutCubic(time, scrollTop, targetScrollTop, 450);

    if (container === window) {
      window.scrollTo(window.pageXOffset, nextScrollTop);
    } else {
      container.scrollTop = nextScrollTop;
    }

    if (time < 450) {
      (0, _raf["default"])(frameFunc);
    } else {
      callback();
    }
  };

  (0, _raf["default"])(frameFunc);
}

var Anchor =
/*#__PURE__*/
function (_React$Component) {
  _inherits(Anchor, _React$Component);

  function Anchor() {
    var _this;

    _classCallCheck(this, Anchor);

    _this = _possibleConstructorReturn(this, _getPrototypeOf(Anchor).apply(this, arguments));
    _this.state = {
      activeLink: null
    };
    _this.links = [];

    _this.handleScroll = function () {
      if (_this.animating) {
        return;
      }

      var _this$props = _this.props,
          offsetTop = _this$props.offsetTop,
          bounds = _this$props.bounds;

      _this.setState({
        activeLink: _this.getCurrentAnchor(offsetTop, bounds)
      });
    };

    _this.handleScrollTo = function (link) {
      var _this$props2 = _this.props,
          offsetTop = _this$props2.offsetTop,
          getContainer = _this$props2.getContainer;
      _this.animating = true;

      _this.setState({
        activeLink: link
      });

      scrollTo(link, offsetTop, getContainer, function () {
        _this.animating = false;
      });
    };

    _this.updateInk = function () {
      if (typeof document === 'undefined') {
        return;
      }

      var prefixCls = _this.prefixCls;
      var anchorNode = ReactDOM.findDOMNode(_assertThisInitialized(_assertThisInitialized(_this)));
      var linkNode = anchorNode.getElementsByClassName("".concat(prefixCls, "-link-title-active"))[0];

      if (linkNode) {
        _this.inkNode.style.top = "".concat(linkNode.offsetTop + linkNode.clientHeight / 2 - 4.5, "px");
      }
    };

    _this.saveInkNode = function (node) {
      _this.inkNode = node;
    };

    _this.renderAnchor = function (_ref) {
      var getPrefixCls = _ref.getPrefixCls;
      var _this$props3 = _this.props,
          customizePrefixCls = _this$props3.prefixCls,
          _this$props3$classNam = _this$props3.className,
          className = _this$props3$classNam === void 0 ? '' : _this$props3$classNam,
          style = _this$props3.style,
          offsetTop = _this$props3.offsetTop,
          affix = _this$props3.affix,
          showInkInFixed = _this$props3.showInkInFixed,
          children = _this$props3.children,
          getContainer = _this$props3.getContainer;
      var activeLink = _this.state.activeLink;
      var prefixCls = getPrefixCls('anchor', customizePrefixCls); // To support old version react.
      // Have to add prefixCls on the instance.
      // https://github.com/facebook/react/issues/12397

      _this.prefixCls = prefixCls;
      var inkClass = (0, _classnames["default"])("".concat(prefixCls, "-ink-ball"), {
        visible: activeLink
      });
      var wrapperClass = (0, _classnames["default"])(className, "".concat(prefixCls, "-wrapper"));
      var anchorClass = (0, _classnames["default"])(prefixCls, {
        fixed: !affix && !showInkInFixed
      });

      var wrapperStyle = _extends({
        maxHeight: offsetTop ? "calc(100vh - ".concat(offsetTop, "px)") : '100vh'
      }, style);

      var anchorContent = React.createElement("div", {
        className: wrapperClass,
        style: wrapperStyle
      }, React.createElement("div", {
        className: anchorClass
      }, React.createElement("div", {
        className: "".concat(prefixCls, "-ink")
      }, React.createElement("span", {
        className: inkClass,
        ref: _this.saveInkNode
      })), children));
      return !affix ? anchorContent : React.createElement(_affix["default"], {
        offsetTop: offsetTop,
        target: getContainer
      }, anchorContent);
    };

    return _this;
  }

  _createClass(Anchor, [{
    key: "getChildContext",
    value: function getChildContext() {
      var _this2 = this;

      var antAnchor = {
        registerLink: function registerLink(link) {
          if (!_this2.links.includes(link)) {
            _this2.links.push(link);
          }
        },
        unregisterLink: function unregisterLink(link) {
          var index = _this2.links.indexOf(link);

          if (index !== -1) {
            _this2.links.splice(index, 1);
          }
        },
        activeLink: this.state.activeLink,
        scrollTo: this.handleScrollTo,
        onClick: this.props.onClick
      };
      return {
        antAnchor: antAnchor
      };
    }
  }, {
    key: "componentDidMount",
    value: function componentDidMount() {
      var getContainer = this.props.getContainer;
      this.scrollEvent = (0, _addEventListener["default"])(getContainer(), 'scroll', this.handleScroll);
      this.handleScroll();
    }
  }, {
    key: "componentWillUnmount",
    value: function componentWillUnmount() {
      if (this.scrollEvent) {
        this.scrollEvent.remove();
      }
    }
  }, {
    key: "componentDidUpdate",
    value: function componentDidUpdate() {
      this.updateInk();
    }
  }, {
    key: "getCurrentAnchor",
    value: function getCurrentAnchor() {
      var offsetTop = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 0;
      var bounds = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 5;
      var activeLink = '';

      if (typeof document === 'undefined') {
        return activeLink;
      }

      var linkSections = [];
      var getContainer = this.props.getContainer;
      var container = getContainer();
      this.links.forEach(function (link) {
        var sharpLinkMatch = sharpMatcherRegx.exec(link.toString());

        if (!sharpLinkMatch) {
          return;
        }

        var target = document.getElementById(sharpLinkMatch[1]);

        if (target) {
          var top = getOffsetTop(target, container);

          if (top < offsetTop + bounds) {
            linkSections.push({
              link: link,
              top: top
            });
          }
        }
      });

      if (linkSections.length) {
        var maxSection = linkSections.reduce(function (prev, curr) {
          return curr.top > prev.top ? curr : prev;
        });
        return maxSection.link;
      }

      return '';
    }
  }, {
    key: "render",
    value: function render() {
      return React.createElement(_configProvider.ConfigConsumer, null, this.renderAnchor);
    }
  }]);

  return Anchor;
}(React.Component);

exports["default"] = Anchor;
Anchor.defaultProps = {
  affix: true,
  showInkInFixed: false,
  getContainer: getDefaultContainer
};
Anchor.childContextTypes = {
  antAnchor: PropTypes.object
};