fbd8b92194
* Apply Status bar color * useIsTablet hook instead of useSplitView in combination with the constant * Constants clean up
75 lines
2.5 KiB
TypeScript
75 lines
2.5 KiB
TypeScript
// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
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// See LICENSE.txt for license information.
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import {Dimensions} from 'react-native';
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import {View} from '@constants';
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import {IMAGE_MAX_HEIGHT, IMAGE_MIN_DIMENSION, MAX_GIF_SIZE, VIEWPORT_IMAGE_OFFSET, VIEWPORT_IMAGE_REPLY_OFFSET} from '@constants/image';
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export const calculateDimensions = (height: number, width: number, viewPortWidth = 0, viewPortHeight = 0) => {
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if (!height || !width) {
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return {
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height: 0,
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width: 0,
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};
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}
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const ratio = height / width;
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const heightRatio = width / height;
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let imageWidth = width;
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let imageHeight = height;
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if (width > viewPortWidth) {
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imageWidth = viewPortWidth;
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imageHeight = imageWidth * ratio;
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} else if (width < IMAGE_MIN_DIMENSION) {
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imageWidth = IMAGE_MIN_DIMENSION;
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imageHeight = imageWidth * ratio;
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}
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if ((imageHeight > IMAGE_MAX_HEIGHT || (viewPortHeight && imageHeight > viewPortHeight)) && viewPortHeight <= IMAGE_MAX_HEIGHT) {
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imageHeight = viewPortHeight || IMAGE_MAX_HEIGHT;
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imageWidth = imageHeight * heightRatio;
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} else if (imageHeight < IMAGE_MIN_DIMENSION && IMAGE_MIN_DIMENSION * heightRatio <= viewPortWidth) {
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imageHeight = IMAGE_MIN_DIMENSION;
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imageWidth = imageHeight * heightRatio;
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} else if (viewPortHeight && imageHeight > viewPortHeight) {
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imageHeight = viewPortHeight;
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imageWidth = imageHeight * heightRatio;
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}
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return {
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height: imageHeight,
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width: imageWidth,
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};
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};
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export function getViewPortWidth(isReplyPost: boolean, tabletOffset = false) {
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const {width, height} = Dimensions.get('window');
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let portraitPostWidth = Math.min(width, height) - VIEWPORT_IMAGE_OFFSET;
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if (tabletOffset) {
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portraitPostWidth -= View.TABLET_SIDEBAR_WIDTH;
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}
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if (isReplyPost) {
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portraitPostWidth -= VIEWPORT_IMAGE_REPLY_OFFSET;
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}
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return portraitPostWidth;
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}
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// isGifTooLarge returns true if we think that the GIF may cause the device to run out of memory when rendered
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// based on the image's dimensions and frame count.
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export function isGifTooLarge(imageMetadata?: PostImage) {
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if (imageMetadata?.format !== 'gif') {
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// Not a gif or from an older server that doesn't count frames
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return false;
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}
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const {frame_count: frameCount, height, width} = imageMetadata;
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// Try to estimate the in-memory size of the gif to prevent the device out of memory
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return width * height * (frameCount || 1) > MAX_GIF_SIZE;
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}
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