@elastic/eui
Version:
Elastic UI Component Library
136 lines (134 loc) • 8.73 kB
JavaScript
;
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.useResizeObserver = exports.hasResizeObserver = exports.EuiResizeObserver = void 0;
var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));
var _createClass2 = _interopRequireDefault(require("@babel/runtime/helpers/createClass"));
var _classCallCheck2 = _interopRequireDefault(require("@babel/runtime/helpers/classCallCheck"));
var _assertThisInitialized2 = _interopRequireDefault(require("@babel/runtime/helpers/assertThisInitialized"));
var _inherits2 = _interopRequireDefault(require("@babel/runtime/helpers/inherits"));
var _possibleConstructorReturn2 = _interopRequireDefault(require("@babel/runtime/helpers/possibleConstructorReturn"));
var _getPrototypeOf2 = _interopRequireDefault(require("@babel/runtime/helpers/getPrototypeOf"));
var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
var _react = require("react");
var _observer = require("../observer");
function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = (0, _getPrototypeOf2.default)(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = (0, _getPrototypeOf2.default)(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return (0, _possibleConstructorReturn2.default)(this, result); }; }
function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } } /*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
var hasResizeObserver = typeof window !== 'undefined' && typeof window.ResizeObserver !== 'undefined';
exports.hasResizeObserver = hasResizeObserver;
var EuiResizeObserver = /*#__PURE__*/function (_EuiObserver) {
(0, _inherits2.default)(EuiResizeObserver, _EuiObserver);
var _super = _createSuper(EuiResizeObserver);
function EuiResizeObserver() {
var _this;
(0, _classCallCheck2.default)(this, EuiResizeObserver);
for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
args[_key] = arguments[_key];
}
_this = _super.call.apply(_super, [this].concat(args));
(0, _defineProperty2.default)((0, _assertThisInitialized2.default)(_this), "name", 'EuiResizeObserver');
(0, _defineProperty2.default)((0, _assertThisInitialized2.default)(_this), "state", {
height: 0,
width: 0
});
(0, _defineProperty2.default)((0, _assertThisInitialized2.default)(_this), "onResize", function () {
// `entry.contentRect` provides incomplete `height` and `width` data.
// Use `getBoundingClientRect` to account for padding and border.
// https://developer.mozilla.org/en-US/docs/Web/API/DOMRectReadOnly
if (!_this.childNode) return;
var _this$childNode$getBo = _this.childNode.getBoundingClientRect(),
height = _this$childNode$getBo.height,
width = _this$childNode$getBo.width;
// Check for actual resize event
if (_this.state.height === height && _this.state.width === width) {
return;
}
_this.props.onResize({
height: height,
width: width
});
_this.setState({
height: height,
width: width
});
});
(0, _defineProperty2.default)((0, _assertThisInitialized2.default)(_this), "beginObserve", function () {
// The superclass checks that childNode is not null before invoking
// beginObserve()
var childNode = _this.childNode;
_this.observer = makeResizeObserver(childNode, _this.onResize);
});
return _this;
}
return (0, _createClass2.default)(EuiResizeObserver);
}(_observer.EuiObserver);
exports.EuiResizeObserver = EuiResizeObserver;
var makeResizeObserver = function makeResizeObserver(node, callback) {
var observer;
if (hasResizeObserver) {
observer = new window.ResizeObserver(callback);
observer.observe(node);
}
return observer;
};
var useResizeObserver = function useResizeObserver(container, dimension) {
var _useState = (0, _react.useState)({
width: 0,
height: 0
}),
_useState2 = (0, _slicedToArray2.default)(_useState, 2),
size = _useState2[0],
_setSize = _useState2[1];
// _currentDimensions and _setSize are used to only store the
// new state (and trigger a re-render) when the new dimensions actually differ
var _currentDimensions = (0, _react.useRef)(size);
var setSize = (0, _react.useCallback)(function (dimensions) {
var doesWidthMatter = dimension !== 'height';
var doesHeightMatter = dimension !== 'width';
if (doesWidthMatter && _currentDimensions.current.width !== dimensions.width || doesHeightMatter && _currentDimensions.current.height !== dimensions.height) {
_currentDimensions.current = dimensions;
_setSize(dimensions);
}
}, [dimension]);
(0, _react.useEffect)(function () {
if (container != null) {
// ResizeObserver's first call to the observation callback is scheduled in the future
// so find the container's initial dimensions now
var boundingRect = container.getBoundingClientRect();
setSize({
width: boundingRect.width,
height: boundingRect.height
});
var observer = makeResizeObserver(container, function () {
// `entry.contentRect` provides incomplete `height` and `width` data.
// Use `getBoundingClientRect` to account for padding and border.
// https://developer.mozilla.org/en-US/docs/Web/API/DOMRectReadOnly
var _container$getBoundin = container.getBoundingClientRect(),
height = _container$getBoundin.height,
width = _container$getBoundin.width;
setSize({
width: width,
height: height
});
});
return function () {
return observer && observer.disconnect();
};
} else {
setSize({
width: 0,
height: 0
});
}
}, [container, setSize]);
return size;
};
exports.useResizeObserver = useResizeObserver;