overleaf/services/web/frontend/js/features/file-view/components/file-view.jsx

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import { useState, useCallback } from 'react'
import PropTypes from 'prop-types'
import { useTranslation } from 'react-i18next'
import FileViewHeader from './file-view-header'
import FileViewImage from './file-view-image'
import FileViewPdf from './file-view-pdf'
import FileViewText from './file-view-text'
import Icon from '../../../shared/components/icon'
import getMeta from '@/utils/meta'
const imageExtensions = ['png', 'jpg', 'jpeg', 'gif']
export default function FileView({ file }) {
const [contentLoading, setContentLoading] = useState(true)
const [hasError, setHasError] = useState(false)
const { t } = useTranslation()
const { textExtensions, editableFilenames } = getMeta('ol-ExposedSettings')
const extension = file.name.split('.').pop().toLowerCase()
const isEditableTextFile =
textExtensions.includes(extension) ||
editableFilenames.includes(file.name.toLowerCase())
const isImageFile = imageExtensions.includes(extension)
const isPdfFile = extension === 'pdf'
const isUnpreviewableFile = !isEditableTextFile && !isImageFile && !isPdfFile
const handleLoad = useCallback(() => {
setContentLoading(false)
}, [])
const handleError = useCallback(() => {
if (!hasError) {
setContentLoading(false)
setHasError(true)
}
}, [hasError])
const content = (
<>
<FileViewHeader file={file} />
{isImageFile && (
<FileViewImage file={file} onLoad={handleLoad} onError={handleError} />
)}
{isEditableTextFile && (
<FileViewText file={file} onLoad={handleLoad} onError={handleError} />
)}
{isPdfFile && (
<FileViewPdf
fileId={file.id}
onLoad={handleLoad}
onError={handleError}
/>
)}
</>
)
return (
<div className="file-view full-size">
{!hasError && content}
{!isUnpreviewableFile && contentLoading && <FileViewLoadingIndicator />}
{(isUnpreviewableFile || hasError) && (
<p className="no-preview">{t('no_preview_available')}</p>
)}
</div>
)
}
function FileViewLoadingIndicator() {
const { t } = useTranslation()
return (
<div className="loading-panel loading-panel-file-view">
<span>
<Icon type="refresh" spin />
&nbsp;&nbsp;{t('loading')}
</span>
</div>
)
}
FileView.propTypes = {
file: PropTypes.shape({
id: PropTypes.string,
name: PropTypes.string,
hash: PropTypes.string,
}).isRequired,
}