overleaf/services/web/frontend/js/shared/context/layout-context.jsx

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import {
createContext,
useContext,
useCallback,
useMemo,
useEffect,
} from 'react'
import PropTypes from 'prop-types'
import useScopeValue from '../hooks/use-scope-value'
import useDetachLayout from '../hooks/use-detach-layout'
import { useIdeContext } from './ide-context'
import localStorage from '../../infrastructure/local-storage'
import getMeta from '../../utils/meta'
import { debugConsole } from '@/utils/debugging'
const debugPdfDetach = getMeta('ol-debugPdfDetach')
export const LayoutContext = createContext()
LayoutContext.Provider.propTypes = {
value: PropTypes.shape({
reattach: PropTypes.func.isRequired,
detach: PropTypes.func.isRequired,
detachIsLinked: PropTypes.bool,
detachRole: PropTypes.string,
changeLayout: PropTypes.func.isRequired,
view: PropTypes.oneOf(['editor', 'file', 'pdf', 'history']),
setView: PropTypes.func.isRequired,
chatIsOpen: PropTypes.bool,
setChatIsOpen: PropTypes.func.isRequired,
reviewPanelOpen: PropTypes.bool,
setReviewPanelOpen: PropTypes.func.isRequired,
leftMenuShown: PropTypes.bool,
setLeftMenuShown: PropTypes.func.isRequired,
pdfLayout: PropTypes.oneOf(['sideBySide', 'flat']).isRequired,
pdfPreviewOpen: PropTypes.bool,
}).isRequired,
}
function setLayoutInLocalStorage(pdfLayout) {
localStorage.setItem(
'pdf.layout',
pdfLayout === 'sideBySide' ? 'split' : 'flat'
)
}
export function LayoutProvider({ children }) {
const { $scope } = useIdeContext()
// what to show in the "flat" view (editor or pdf)
const [view, _setView] = useScopeValue('ui.view')
const setView = useCallback(
value => {
_setView(oldValue => {
// ensure that the "history:toggle" event is broadcast when switching in or out of history view
if (value === 'history' || oldValue === 'history') {
$scope.toggleHistory()
}
if (value === 'editor' && $scope.openFile) {
// if a file is currently opened, ensure the view is 'file' instead of
// 'editor' when the 'editor' view is requested. This is to ensure
// that the entity selected in the file tree is the one visible and
// that docs don't take precendence over files.
return 'file'
}
return value
})
},
[$scope, _setView]
)
// whether the chat pane is open
const [chatIsOpen, setChatIsOpen] = useScopeValue('ui.chatOpen')
// whether the review pane is open
const [reviewPanelOpen, setReviewPanelOpen] =
useScopeValue('ui.reviewPanelOpen')
// whether the menu pane is open
const [leftMenuShown, setLeftMenuShown] = useScopeValue('ui.leftMenuShown')
// whether to display the editor and preview side-by-side or full-width ("flat")
const [pdfLayout, setPdfLayout] = useScopeValue('ui.pdfLayout')
// whether stylesheet on theme is loading
const [loadingStyleSheet, setLoadingStyleSheet] = useScopeValue(
'ui.loadingStyleSheet'
)
// switch to either side-by-side or flat (full-width) layout
const switchLayout = useCallback(() => {
setPdfLayout(layout => {
const newLayout = layout === 'sideBySide' ? 'flat' : 'sideBySide'
setView(newLayout === 'sideBySide' ? 'editor' : 'pdf')
setPdfLayout(newLayout)
setLayoutInLocalStorage(newLayout)
})
}, [setPdfLayout, setView])
const changeLayout = useCallback(
(newLayout, newView) => {
setPdfLayout(newLayout)
setView(newLayout === 'sideBySide' ? 'editor' : newView)
setLayoutInLocalStorage(newLayout)
},
[setPdfLayout, setView]
)
const {
reattach,
detach,
isLinking: detachIsLinking,
isLinked: detachIsLinked,
role: detachRole,
isRedundant: detachIsRedundant,
} = useDetachLayout()
const pdfPreviewOpen =
pdfLayout === 'sideBySide' || view === 'pdf' || detachRole === 'detacher'
useEffect(() => {
if (debugPdfDetach) {
debugConsole.warn('Layout Effect', {
detachIsRedundant,
detachRole,
detachIsLinking,
detachIsLinked,
})
}
if (detachRole !== 'detacher') return // not in a PDF detacher layout
if (detachIsRedundant) {
changeLayout('sideBySide')
return
}
if (detachIsLinking || detachIsLinked) {
// the tab is linked to a detached tab (or about to be linked); show
// editor only
changeLayout('flat', 'editor')
}
}, [
detachIsRedundant,
detachRole,
detachIsLinking,
detachIsLinked,
changeLayout,
])
const value = useMemo(
() => ({
reattach,
detach,
detachIsLinked,
detachRole,
changeLayout,
chatIsOpen,
leftMenuShown,
pdfLayout,
pdfPreviewOpen,
reviewPanelOpen,
loadingStyleSheet,
setChatIsOpen,
setLeftMenuShown,
setPdfLayout,
setReviewPanelOpen,
setLoadingStyleSheet,
setView,
switchLayout,
view,
}),
[
reattach,
detach,
detachIsLinked,
detachRole,
changeLayout,
chatIsOpen,
leftMenuShown,
pdfLayout,
pdfPreviewOpen,
reviewPanelOpen,
loadingStyleSheet,
setChatIsOpen,
setLeftMenuShown,
setPdfLayout,
setReviewPanelOpen,
setLoadingStyleSheet,
setView,
switchLayout,
view,
]
)
return (
<LayoutContext.Provider value={value}>{children}</LayoutContext.Provider>
)
}
LayoutProvider.propTypes = {
children: PropTypes.any,
}
export function useLayoutContext(propTypes) {
const data = useContext(LayoutContext)
PropTypes.checkPropTypes(propTypes, data, 'data', 'LayoutContext.Provider')
return data
}