choerodon-ui/es/anchor/Anchor.js

An enterprise-class UI design language and React-based implementation

import _extends from "@babel/runtime/helpers/extends";
import _objectSpread from "@babel/runtime/helpers/objectSpread2";
import _classCallCheck from "@babel/runtime/helpers/classCallCheck";
import _createClass from "@babel/runtime/helpers/createClass";
import _assertThisInitialized from "@babel/runtime/helpers/assertThisInitialized";
import _inherits from "@babel/runtime/helpers/inherits";
import _createSuper from "@babel/runtime/helpers/createSuper";
import React, { Component } from 'react';
import { findDOMNode } from 'react-dom';
import classNames from 'classnames';
import addEventListener from '../_util/addEventListener';
import Affix from '../affix';
import scrollTo from '../_util/scrollTo';
import getScroll from '../_util/getScroll';
import ConfigContext from '../config-provider/ConfigContext';
import { AnchorContextProvider } from './AnchorContext';

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 && element.ownerDocument) {
      container = element.ownerDocument.documentElement;
      return rect.top - container.clientTop;
    }

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

  return rect.top;
}

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

var Anchor = /*#__PURE__*/function (_Component) {
  _inherits(Anchor, _Component);

  var _super = _createSuper(Anchor);

  function Anchor() {
    var _this;

    _classCallCheck(this, Anchor);

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

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

      _this.setState({
        activeLink: link
      });

      var container = getContainer();
      var scrollTop = getScroll(container, true);
      var sharpLinkMatch = sharpMatcherRegx.exec(link);

      if (!sharpLinkMatch) {
        return;
      }

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

      if (!targetElement) {
        return;
      }

      var eleOffsetTop = getOffsetTop(targetElement, container);
      var y = scrollTop + eleOffsetTop;
      y -= targetOffset !== undefined ? targetOffset : offsetTop || 0;
      _this.animating = true;
      scrollTo(y, {
        callback: function callback() {
          _this.animating = false;
        },
        getContainer: getContainer
      });
    };

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

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

      var activeLink = _this.state.activeLink;
      var _this$props2 = _this.props,
          offsetTop = _this$props2.offsetTop,
          bounds = _this$props2.bounds,
          targetOffset = _this$props2.targetOffset;

      var currentActiveLink = _this.getCurrentAnchor(targetOffset !== undefined ? targetOffset : offsetTop || 0, bounds);

      if (activeLink !== currentActiveLink) {
        _this.setState({
          activeLink: currentActiveLink
        });
      }
    };

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

      var prefixCls = _this.getPrefixCls();

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

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

    return _this;
  }

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

      var onClick = this.props.onClick;
      var activeLink = this.state.activeLink;
      var c7nAnchor = {
        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: activeLink,
        scrollTo: this.handleScrollTo,
        onClick: onClick
      };
      return {
        c7nAnchor: c7nAnchor
      };
    }
  }, {
    key: "componentDidMount",
    value: function componentDidMount() {
      var getContainer = this.props.getContainer;
      this.scrollContainer = getContainer();
      this.scrollEvent = addEventListener(this.scrollContainer, 'scroll', this.handleScroll);
      this.handleScroll();
    }
  }, {
    key: "componentDidUpdate",
    value: function componentDidUpdate() {
      if (this.scrollEvent) {
        var getContainer = this.props.getContainer;
        var currentContainer = getContainer();

        if (this.scrollContainer !== currentContainer) {
          this.scrollContainer = currentContainer;
          this.scrollEvent.remove();
          this.scrollEvent = addEventListener(this.scrollContainer, 'scroll', this.handleScroll);
          this.handleScroll();
        }
      }

      this.updateInk();
    }
  }, {
    key: "componentWillUnmount",
    value: function componentWillUnmount() {
      if (this.scrollEvent) {
        this.scrollEvent.remove();
      }
    }
  }, {
    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 getCurrentAnchor = this.props.getCurrentAnchor;

      if (typeof getCurrentAnchor === 'function') {
        return getCurrentAnchor();
      }

      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: "getPrefixCls",
    value: function getPrefixCls() {
      var prefixCls = this.props.prefixCls;
      var getPrefixCls = this.context.getPrefixCls;
      return getPrefixCls('anchor', prefixCls);
    }
  }, {
    key: "render",
    value: function render() {
      var _this$props3 = this.props,
          _this$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 getPrefixCls = this.context.getPrefixCls;
      var prefixCls = this.getPrefixCls();
      var inkClass = classNames("".concat(prefixCls, "-ink-ball"), {
        visible: activeLink
      });
      var wrapperClass = classNames(className, "".concat(prefixCls, "-wrapper"));
      var anchorClass = classNames(prefixCls, {
        fixed: !affix && !showInkInFixed
      });

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

      var anchorContent = /*#__PURE__*/React.createElement("div", {
        className: wrapperClass,
        style: wrapperStyle
      }, /*#__PURE__*/React.createElement("div", {
        className: anchorClass
      }, /*#__PURE__*/React.createElement("div", {
        className: "".concat(prefixCls, "-ink")
      }, /*#__PURE__*/React.createElement("span", {
        className: inkClass,
        ref: this.saveInkNode
      })), /*#__PURE__*/React.createElement(AnchorContextProvider, _extends({}, this.getContextValue(), {
        getPrefixCls: getPrefixCls
      }), children)));
      return !affix ? anchorContent : /*#__PURE__*/React.createElement(Affix, {
        offsetTop: offsetTop,
        target: getContainer
      }, anchorContent);
    }
  }], [{
    key: "contextType",
    get: function get() {
      return ConfigContext;
    }
  }]);

  return Anchor;
}(Component);

export { Anchor as default };
Anchor.displayName = 'Anchor';
Anchor.defaultProps = {
  affix: true,
  showInkInFixed: false,
  getContainer: getDefaultContainer
};
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