react-mdc-web/lib/Toolbar/Toolbar.js

React web components for Material Design

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

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

var _propTypes = require('prop-types');

var _propTypes2 = _interopRequireDefault(_propTypes);

var _react = require('react');

var _react2 = _interopRequireDefault(_react);

var _classnames2 = require('classnames');

var _classnames3 = _interopRequireDefault(_classnames2);

var _ToolbarRow = require('./ToolbarRow');

var _ToolbarRow2 = _interopRequireDefault(_ToolbarRow);

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

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 _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 ROOT = 'mdc-toolbar';
var FIXED = ROOT + '--fixed';
var WATERFALL = ROOT + '--waterfall';
var FIXED_LAST_ROW_ONLY = ROOT + '--fixed-lastrow-only';
var FLEXIBLE = ROOT + '--flexible';
var FLEXIBLE_DEFAULT_BEHAVIOR = ROOT + '--flexible-default-behavior';

var FLEXIBLE_MAX = ROOT + '--flexible-space-maximized';
var FLEXIBLE_MIN = ROOT + '--flexible-space-minimized';

var TOOLBAR_MOBILE_BREAKPOINT = 600;
var TOOLBAR_ROW_HEIGHT = 64;
var TOOLBAR_ROW_MOBILE_HEIGHT = 56;

var Toolbar = function (_React$PureComponent) {
  _inherits(Toolbar, _React$PureComponent);

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

    var _this = _possibleConstructorReturn(this, (Toolbar.__proto__ || Object.getPrototypeOf(Toolbar)).call(this, props));

    _this.state = { flexibleExpansionRatio: 0 };
    _this.handleScroll = _this.handleScroll.bind(_this);
    _this.calculations = { toolbarRowHeight: 0 };
    return _this;
  }

  _createClass(Toolbar, [{
    key: 'componentDidMount',
    value: function componentDidMount() {
      this.getWindow().addEventListener('scroll', this.handleScroll);
      this.initKeyRatio();
      this.setKeyHeights();
    }
  }, {
    key: 'componentWillUnmount',
    value: function componentWillUnmount() {
      this.getWindow().removeEventListener('scroll', this.handleScroll);
    }
  }, {
    key: 'getFlexibleExpansionRatio',
    value: function getFlexibleExpansionRatio() {
      // To prevent division by zero when there is no flexibleExpansionHeight
      var delta = 0.0001;
      var scrollTop = this.state.scrollTop;
      var flexibleExpansionHeight = this.calculations.flexibleExpansionHeight;

      return Math.max(0, 1 - scrollTop / (flexibleExpansionHeight + delta));
    }
  }, {
    key: 'getWindow',
    value: function getWindow() {
      var windowContext = this.props.windowContext;

      if (windowContext) {
        return windowContext;
      }
      return window;
    }
  }, {
    key: 'getRowHeight',
    value: function getRowHeight() {
      var breakpoint = TOOLBAR_MOBILE_BREAKPOINT;
      var viewPortWidth = this.getWindow().innerWidth;
      return viewPortWidth < breakpoint ? TOOLBAR_ROW_MOBILE_HEIGHT : TOOLBAR_ROW_HEIGHT;
    }
  }, {
    key: 'setKeyHeights',
    value: function setKeyHeights() {
      var newToolbarRowHeight = this.getRowHeight();
      var _calculations = this.calculations,
          toolbarRatio = _calculations.toolbarRatio,
          toolbarRowHeight = _calculations.toolbarRowHeight;

      if (newToolbarRowHeight !== this.calculations.toolbarRowHeight) {
        this.calculations.toolbarRowHeight = newToolbarRowHeight;
        this.calculations.toolbarHeight = toolbarRatio * toolbarRowHeight;
        this.calculations.flexibleExpansionHeight = this.calculations.flexibleExpansionRatio * this.calculations.toolbarRowHeight;
        this.calculations.maxTranslateYDistance = this.calculations.maxTranslateYRatio * this.calculations.toolbarRowHeight;
        this.calculations.scrollThreshold = this.calculations.scrollThresholdRatio * this.calculations.toolbarRowHeight;
      }
    }
  }, {
    key: 'initKeyRatio',
    value: function initKeyRatio() {
      var toolbarRowHeight = this.getRowHeight();
      var firstRowMaxRatio = this.calculations.firstRowHeight / toolbarRowHeight;
      this.calculations.toolbarRatio = this.calculations.rootOffsetHeight / toolbarRowHeight;
      this.calculations.flexibleExpansionRatio = firstRowMaxRatio - 1;
      this.calculations.maxTranslateYRatio = this.fixedLastrow ? this.calculations.toolbarRatio - firstRowMaxRatio : 0;
      this.calculations.scrollThresholdRatio = (this.fixedLastrow ? this.calculations.toolbarRatio : firstRowMaxRatio) - 1;
    }
  }, {
    key: 'handleScroll',
    value: function handleScroll() {
      this.setState({ scrollTop: this.getWindow().pageYOffset });
    }
  }, {
    key: 'render',
    value: function render() {
      var _this2 = this,
          _classnames;

      var _props = this.props,
          className = _props.className,
          fixed = _props.fixed,
          waterfall = _props.waterfall,
          fixedLastRowOnly = _props.fixedLastRowOnly,
          flexible = _props.flexible,
          flexibleDefaultBehavior = _props.flexibleDefaultBehavior,
          children = _props.children,
          windowContext = _props.windowContext,
          otherProps = _objectWithoutProperties(_props, ['className', 'fixed', 'waterfall', 'fixedLastRowOnly', 'flexible', 'flexibleDefaultBehavior', 'children', 'windowContext']);

      var firstRowFound = false;
      var childs = _react.Children.map(children, function (child) {
        if (!firstRowFound && child.type === _ToolbarRow2.default) {
          return (0, _react.cloneElement)(child, {
            onHeight: function onHeight(height) {
              _this2.calculations.firstRowHeight = height;
            }
          });
        }
        return child;
      });

      var flexibleExpansionRatio = this.getFlexibleExpansionRatio();

      return _react2.default.createElement(
        'header',
        _extends({
          className: (0, _classnames3.default)(ROOT, (_classnames = {}, _defineProperty(_classnames, FIXED, fixed), _defineProperty(_classnames, FIXED_LAST_ROW_ONLY, fixedLastRowOnly), _defineProperty(_classnames, WATERFALL, waterfall), _defineProperty(_classnames, FLEXIBLE, flexible), _defineProperty(_classnames, FLEXIBLE_DEFAULT_BEHAVIOR, flexibleDefaultBehavior), _defineProperty(_classnames, FLEXIBLE_MAX, flexibleExpansionRatio === 1), _defineProperty(_classnames, FLEXIBLE_MIN, flexibleExpansionRatio === 0), _classnames), className),
          ref: function ref(native) {
            if (native) {
              _this2.calculations.rootOffsetHeight = native.offsetHeight;
            }
          }
        }, otherProps),
        childs
      );
    }
  }]);

  return Toolbar;
}(_react2.default.PureComponent);

Toolbar.propTypes = {
  className: _propTypes2.default.string,
  children: _propTypes2.default.node,
  fixed: _propTypes2.default.bool,
  waterfall: _propTypes2.default.bool,
  flexible: _propTypes2.default.bool,
  fixedLastRowOnly: _propTypes2.default.bool,
  flexibleDefaultBehavior: _propTypes2.default.bool,
  onChange: _propTypes2.default.func,
  windowContext: _propTypes2.default.object // eslint-disable-line react/forbid-prop-types
};
exports.default = Toolbar;