primereact/scrollpanel/scrollpanel.js

PrimeReact is an open source UI library for React featuring a rich set of 90+ components, a theme designer, various theme alternatives such as Material, Bootstrap, Tailwind, premium templates and professional support. In addition, it integrates with Prime

this.primereact = this.primereact || {};
this.primereact.scrollpanel = (function (exports, React, hooks, utils) {
  'use strict';

  function _interopNamespace(e) {
    if (e && e.__esModule) return e;
    var n = Object.create(null);
    if (e) {
      Object.keys(e).forEach(function (k) {
        if (k !== 'default') {
          var d = Object.getOwnPropertyDescriptor(e, k);
          Object.defineProperty(n, k, d.get ? d : {
            enumerable: true,
            get: function () { return e[k]; }
          });
        }
      });
    }
    n["default"] = e;
    return Object.freeze(n);
  }

  var React__namespace = /*#__PURE__*/_interopNamespace(React);

  function _extends() {
    _extends = Object.assign ? Object.assign.bind() : 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);
  }

  var ScrollPanelBase = {
    defaultProps: {
      __TYPE: 'ScrollPanel',
      id: null,
      style: null,
      className: null,
      children: undefined
    },
    getProps: function getProps(props) {
      return utils.ObjectUtils.getMergedProps(props, ScrollPanelBase.defaultProps);
    },
    getOtherProps: function getOtherProps(props) {
      return utils.ObjectUtils.getDiffProps(props, ScrollPanelBase.defaultProps);
    }
  };

  var ScrollPanel = /*#__PURE__*/React__namespace.forwardRef(function (inProps, ref) {
    var props = ScrollPanelBase.getProps(inProps);
    var containerRef = React__namespace.useRef(null);
    var contentRef = React__namespace.useRef(null);
    var xBarRef = React__namespace.useRef(null);
    var yBarRef = React__namespace.useRef(null);
    var isXBarClicked = React__namespace.useRef(false);
    var isYBarClicked = React__namespace.useRef(false);
    var lastPageX = React__namespace.useRef(null);
    var lastPageY = React__namespace.useRef(null);
    var scrollXRatio = React__namespace.useRef(null);
    var scrollYRatio = React__namespace.useRef(null);
    var frame = React__namespace.useRef(null);
    var initialized = React__namespace.useRef(false);
    var calculateContainerHeight = function calculateContainerHeight() {
      var containerStyles = getComputedStyle(containerRef.current);
      var xBarStyles = getComputedStyle(xBarRef.current);
      var pureContainerHeight = utils.DomHandler.getHeight(containerRef.current) - parseInt(xBarStyles['height'], 10);
      if (containerStyles['max-height'] !== 'none' && pureContainerHeight === 0) {
        if (contentRef.current.offsetHeight + parseInt(xBarStyles['height'], 10) > parseInt(containerStyles['max-height'], 10)) {
          containerRef.current.style.height = containerStyles['max-height'];
        } else {
          containerRef.current.style.height = contentRef.current.offsetHeight + parseFloat(containerStyles.paddingTop) + parseFloat(containerStyles.paddingBottom) + parseFloat(containerStyles.borderTopWidth) + parseFloat(containerStyles.borderBottomWidth) + 'px';
        }
      }
    };
    var moveBar = function moveBar() {
      // horizontal scroll
      var totalWidth = contentRef.current.scrollWidth;
      var ownWidth = contentRef.current.clientWidth;
      var bottom = (containerRef.current.clientHeight - xBarRef.current.clientHeight) * -1;
      scrollXRatio.current = ownWidth / totalWidth;

      // vertical scroll
      var totalHeight = contentRef.current.scrollHeight;
      var ownHeight = contentRef.current.clientHeight;
      var right = (containerRef.current.clientWidth - yBarRef.current.clientWidth) * -1;
      scrollYRatio.current = ownHeight / totalHeight;
      frame.current = window.requestAnimationFrame(function () {
        if (scrollXRatio.current >= 1) {
          utils.DomHandler.addClass(xBarRef.current, 'p-scrollpanel-hidden');
        } else {
          utils.DomHandler.removeClass(xBarRef.current, 'p-scrollpanel-hidden');
          xBarRef.current.style.cssText = 'width:' + Math.max(scrollXRatio.current * 100, 10) + '%; left:' + contentRef.current.scrollLeft / totalWidth * 100 + '%;bottom:' + bottom + 'px;';
        }
        if (scrollYRatio.current >= 1) {
          utils.DomHandler.addClass(yBarRef.current, 'p-scrollpanel-hidden');
        } else {
          utils.DomHandler.removeClass(yBarRef.current, 'p-scrollpanel-hidden');
          yBarRef.current.style.cssText = 'height:' + Math.max(scrollYRatio.current * 100, 10) + '%; top: calc(' + contentRef.current.scrollTop / totalHeight * 100 + '% - ' + xBarRef.current.clientHeight + 'px);right:' + right + 'px;';
        }
      });
    };
    var onYBarMouseDown = function onYBarMouseDown(event) {
      isYBarClicked.current = true;
      lastPageY.current = event.pageY;
      utils.DomHandler.addClass(yBarRef.current, 'p-scrollpanel-grabbed');
      utils.DomHandler.addClass(document.body, 'p-scrollpanel-grabbed');
      document.addEventListener('mousemove', onDocumentMouseMove);
      document.addEventListener('mouseup', onDocumentMouseUp);
      event.preventDefault();
    };
    var onXBarMouseDown = function onXBarMouseDown(event) {
      isXBarClicked.current = true;
      lastPageX.current = event.pageX;
      utils.DomHandler.addClass(xBarRef.current, 'p-scrollpanel-grabbed');
      utils.DomHandler.addClass(document.body, 'p-scrollpanel-grabbed');
      document.addEventListener('mousemove', onDocumentMouseMove);
      document.addEventListener('mouseup', onDocumentMouseUp);
      event.preventDefault();
    };
    var onDocumentMouseMove = function onDocumentMouseMove(event) {
      if (isXBarClicked.current) {
        onMouseMoveForXBar(event);
      } else if (isYBarClicked.current) {
        onMouseMoveForYBar(event);
      } else {
        onMouseMoveForXBar(event);
        onMouseMoveForYBar(event);
      }
    };
    var onMouseMoveForXBar = function onMouseMoveForXBar(event) {
      var deltaX = event.pageX - lastPageX.current;
      lastPageX.current = event.pageX;
      frame.current = window.requestAnimationFrame(function () {
        contentRef.current.scrollLeft += deltaX / scrollXRatio.current;
      });
    };
    var onMouseMoveForYBar = function onMouseMoveForYBar(event) {
      var deltaY = event.pageY - lastPageY.current;
      lastPageY.current = event.pageY;
      frame.current = window.requestAnimationFrame(function () {
        contentRef.current.scrollTop += deltaY / scrollYRatio.current;
      });
    };
    var onDocumentMouseUp = function onDocumentMouseUp(event) {
      utils.DomHandler.removeClass(yBarRef.current, 'p-scrollpanel-grabbed');
      utils.DomHandler.removeClass(xBarRef.current, 'p-scrollpanel-grabbed');
      utils.DomHandler.removeClass(document.body, 'p-scrollpanel-grabbed');
      document.removeEventListener('mousemove', onDocumentMouseMove);
      document.removeEventListener('mouseup', onDocumentMouseUp);
      isXBarClicked.current = false;
      isYBarClicked.current = false;
    };
    var refresh = function refresh() {
      moveBar();
    };
    hooks.useMountEffect(function () {
      moveBar();
      window.addEventListener('resize', moveBar);
      calculateContainerHeight();
      initialized.current = true;
    });
    hooks.useUnmountEffect(function () {
      if (initialized.current) {
        window.removeEventListener('resize', moveBar);
      }
      if (frame.current) {
        window.cancelAnimationFrame(frame.current);
      }
    });
    React__namespace.useImperativeHandle(ref, function () {
      return {
        props: props,
        refresh: refresh,
        getElement: function getElement() {
          return containerRef.current;
        },
        getContent: function getContent() {
          return contentRef.current;
        },
        getXBar: function getXBar() {
          return xBarRef.current;
        },
        getYBar: function getYBar() {
          return yBarRef.current;
        }
      };
    });
    var otherProps = ScrollPanelBase.getOtherProps(props);
    var className = utils.classNames('p-scrollpanel p-component', props.className);
    return /*#__PURE__*/React__namespace.createElement("div", _extends({
      ref: containerRef,
      id: props.id,
      className: className,
      style: props.style
    }, otherProps), /*#__PURE__*/React__namespace.createElement("div", {
      className: "p-scrollpanel-wrapper"
    }, /*#__PURE__*/React__namespace.createElement("div", {
      ref: contentRef,
      className: "p-scrollpanel-content",
      onScroll: moveBar,
      onMouseEnter: moveBar
    }, props.children)), /*#__PURE__*/React__namespace.createElement("div", {
      ref: xBarRef,
      className: "p-scrollpanel-bar p-scrollpanel-bar-x",
      onMouseDown: onXBarMouseDown
    }), /*#__PURE__*/React__namespace.createElement("div", {
      ref: yBarRef,
      className: "p-scrollpanel-bar p-scrollpanel-bar-y",
      onMouseDown: onYBarMouseDown
    }));
  });
  ScrollPanel.displayName = 'ScrollPanel';

  exports.ScrollPanel = ScrollPanel;

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

  return exports;

})({}, React, primereact.hooks, primereact.utils);