blueprintjs-core
Version:
Core styles & components
102 lines • 4.4 kB
JavaScript
;
/*
* Copyright 2018 Palantir Technologies, Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.ResizeSensor = void 0;
var tslib_1 = require("tslib");
var React = tslib_1.__importStar(require("react"));
var react_dom_1 = require("react-dom");
var react_lifecycles_compat_1 = require("react-lifecycles-compat");
var resize_observer_polyfill_1 = tslib_1.__importDefault(require("resize-observer-polyfill"));
var common_1 = require("../../common");
var props_1 = require("../../common/props");
/** `ResizeSensor` requires a single DOM element child and will error otherwise. */
var ResizeSensor = /** @class */ (function (_super) {
tslib_1.__extends(ResizeSensor, _super);
function ResizeSensor() {
var _this = _super !== null && _super.apply(this, arguments) || this;
_this.element = null;
_this.observer = new resize_observer_polyfill_1.default(function (entries) { var _a, _b; return (_b = (_a = _this.props).onResize) === null || _b === void 0 ? void 0 : _b.call(_a, entries); });
return _this;
}
ResizeSensor.prototype.render = function () {
// pass-through render of single child
return React.Children.only(this.props.children);
};
ResizeSensor.prototype.componentDidMount = function () {
this.observeElement();
};
ResizeSensor.prototype.componentDidUpdate = function (prevProps) {
this.observeElement(this.props.observeParents !== prevProps.observeParents);
};
ResizeSensor.prototype.componentWillUnmount = function () {
this.observer.disconnect();
};
/**
* Observe the DOM element, if defined and different from the currently
* observed element. Pass `force` argument to skip element checks and always
* re-observe.
*/
ResizeSensor.prototype.observeElement = function (force) {
if (force === void 0) { force = false; }
var element = this.getElement();
if (!(element instanceof Element)) {
// stop everything if not defined
this.observer.disconnect();
return;
}
if (element === this.element && !force) {
// quit if given same element -- nothing to update (unless forced)
return;
}
else {
// clear observer list if new element
this.observer.disconnect();
// remember element reference for next time
this.element = element;
}
// observer callback is invoked immediately when observing new elements
this.observer.observe(element);
if (this.props.observeParents) {
var parent_1 = element.parentElement;
while (parent_1 != null) {
this.observer.observe(parent_1);
parent_1 = parent_1.parentElement;
}
}
};
ResizeSensor.prototype.getElement = function () {
try {
// using findDOMNode for two reasons:
// 1. cloning to insert a ref is unwieldy and not performant.
// 2. ensure that we resolve to an actual DOM node (instead of any JSX ref instance).
// HACKHACK: see https://github.com/palantir/blueprint/issues/3979
/* eslint-disable-next-line react/no-find-dom-node */
return react_dom_1.findDOMNode(this);
}
catch (_a) {
// swallow error if findDOMNode is run on unmounted component.
return null;
}
};
ResizeSensor.displayName = props_1.DISPLAYNAME_PREFIX + ".ResizeSensor";
ResizeSensor = tslib_1.__decorate([
react_lifecycles_compat_1.polyfill
], ResizeSensor);
return ResizeSensor;
}(common_1.AbstractPureComponent2));
exports.ResizeSensor = ResizeSensor;
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