88 lines
2.1 KiB
JavaScript
88 lines
2.1 KiB
JavaScript
/**
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* Copyright (c) Nicolas Gallagher.
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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*
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*/
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import { canUseDOM } from 'fbjs/lib/ExecutionEnvironment';
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import invariant from 'fbjs/lib/invariant';
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var win = canUseDOM ? window : {
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devicePixelRatio: undefined,
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innerHeight: undefined,
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innerWidth: undefined,
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screen: {
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height: undefined,
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width: undefined
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}
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};
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var dimensions = {};
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var listeners = {};
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var Dimensions =
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/*#__PURE__*/
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function () {
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function Dimensions() {}
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Dimensions.get = function get(dimension) {
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invariant(dimensions[dimension], "No dimension set for key " + dimension);
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return dimensions[dimension];
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};
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Dimensions.set = function set(initialDimensions) {
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if (initialDimensions) {
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if (canUseDOM) {
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invariant(false, 'Dimensions cannot be set in the browser');
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} else {
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dimensions.screen = initialDimensions.screen;
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dimensions.window = initialDimensions.window;
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}
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}
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};
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Dimensions._update = function _update() {
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dimensions.window = {
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fontScale: 1,
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height: win.innerHeight,
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scale: win.devicePixelRatio || 1,
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width: win.innerWidth
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};
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dimensions.screen = {
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fontScale: 1,
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height: win.screen.height,
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scale: win.devicePixelRatio || 1,
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width: win.screen.width
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};
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if (Array.isArray(listeners['change'])) {
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listeners['change'].forEach(function (handler) {
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return handler(dimensions);
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});
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}
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};
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Dimensions.addEventListener = function addEventListener(type, handler) {
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listeners[type] = listeners[type] || [];
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listeners[type].push(handler);
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};
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Dimensions.removeEventListener = function removeEventListener(type, handler) {
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if (Array.isArray(listeners[type])) {
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listeners[type] = listeners[type].filter(function (_handler) {
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return _handler !== handler;
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});
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}
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};
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return Dimensions;
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}();
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export { Dimensions as default };
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Dimensions._update();
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if (canUseDOM) {
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window.addEventListener('resize', Dimensions._update, false);
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} |