98 lines
3.3 KiB
Plaintext
98 lines
3.3 KiB
Plaintext
/*
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* Copyright 2020 Adobe. All rights reserved.
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* This file is licensed to you under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License. You may obtain a copy
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* of the License at http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software distributed under
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* the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
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* OF ANY KIND, either express or implied. See the License for the specific language
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* governing permissions and limitations under the License.
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*/
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import {useEffect, useState} from 'react';
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import {useIsSSR} from '@react-aria/ssr';
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import {willOpenKeyboard} from './keyboard';
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interface ViewportSize {
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width: number,
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height: number
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}
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let visualViewport = typeof document !== 'undefined' && window.visualViewport;
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export function useViewportSize(): ViewportSize {
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let isSSR = useIsSSR();
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let [size, setSize] = useState(() => isSSR ? {width: 0, height: 0} : getViewportSize());
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useEffect(() => {
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// Use visualViewport api to track available height even on iOS virtual keyboard opening
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let onResize = () => {
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// Ignore updates when zoomed.
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if (visualViewport && visualViewport.scale > 1) {
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return;
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}
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setSize(size => {
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let newSize = getViewportSize();
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if (newSize.width === size.width && newSize.height === size.height) {
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return size;
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}
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return newSize;
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});
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};
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// When closing the keyboard, iOS does not fire the visual viewport resize event until the animation is complete.
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// We can anticipate this and resize early by handling the blur event and using the layout size.
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let frame: number;
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let onBlur = (e: FocusEvent) => {
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if (visualViewport && visualViewport.scale > 1) {
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return;
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}
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if (willOpenKeyboard(e.target as Element)) {
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// Wait one frame to see if a new element gets focused.
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frame = requestAnimationFrame(() => {
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if (!document.activeElement || !willOpenKeyboard(document.activeElement)) {
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setSize(size => {
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let newSize = {width: window.innerWidth, height: window.innerHeight};
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if (newSize.width === size.width && newSize.height === size.height) {
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return size;
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}
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return newSize;
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});
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}
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});
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}
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};
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window.addEventListener('blur', onBlur, true);
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if (!visualViewport) {
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window.addEventListener('resize', onResize);
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} else {
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visualViewport.addEventListener('resize', onResize);
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}
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return () => {
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cancelAnimationFrame(frame);
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window.removeEventListener('blur', onBlur, true);
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if (!visualViewport) {
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window.removeEventListener('resize', onResize);
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} else {
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visualViewport.removeEventListener('resize', onResize);
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}
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};
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}, []);
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return size;
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}
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function getViewportSize(): ViewportSize {
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return {
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// Multiply by the visualViewport scale to get the "natural" size, unaffected by pinch zooming.
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width: visualViewport ? visualViewport.width * visualViewport.scale : window.innerWidth,
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height: visualViewport ? visualViewport.height * visualViewport.scale : window.innerHeight
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};
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}
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