overleaf/services/web/frontend/js/features/source-editor/extensions/auto-complete.ts

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import {
acceptCompletion,
autocompletion,
closeCompletion,
moveCompletionSelection,
startCompletion,
Completion,
} from '@codemirror/autocomplete'
import { EditorView, keymap } from '@codemirror/view'
import { Compartment, Prec, TransactionSpec } from '@codemirror/state'
const autoCompleteConf = new Compartment()
export const autoComplete = ({ autoComplete }: { autoComplete: boolean }) =>
autoCompleteConf.of(createAutoComplete(autoComplete))
export const setAutoComplete = (autoComplete: boolean): TransactionSpec => {
return {
effects: autoCompleteConf.reconfigure(createAutoComplete(autoComplete)),
}
}
const createAutoComplete = (enabled: boolean) => {
if (!enabled) {
return []
}
return [
[
autocompleteTheme,
autocompletion({
icons: false,
defaultKeymap: false,
addToOptions: [
// display the completion "type" at the end of the suggestion
{
render: completion => {
const span = document.createElement('span')
span.classList.add('ol-cm-completionType')
if (completion.type) {
span.textContent = completion.type
}
return span
},
position: 400,
},
],
optionClass: (completion: Completion) => {
return `ol-cm-completion-${completion.type}`
},
interactionDelay: 0,
}),
Prec.highest(
keymap.of([
{ key: 'Escape', run: closeCompletion },
{ key: 'ArrowDown', run: moveCompletionSelection(true) },
{ key: 'ArrowUp', run: moveCompletionSelection(false) },
{ key: 'PageDown', run: moveCompletionSelection(true, 'page') },
{ key: 'PageUp', run: moveCompletionSelection(false, 'page') },
{ key: 'Enter', run: acceptCompletion },
{ key: 'Tab', run: acceptCompletion },
])
),
// NOTE: must be lower precedence than Ctrl-Space and Alt-Space in references-search
Prec.high(
keymap.of([
{ key: 'Ctrl-Space', run: startCompletion },
{ key: 'Alt-Space', run: startCompletion },
])
),
],
]
}
const autocompleteTheme = EditorView.baseTheme({
'.cm-tooltip.cm-tooltip-autocomplete': {
// shift the tooltip, so the completion aligns with the text
marginLeft: '-4px',
},
'&light .cm-tooltip.cm-tooltip-autocomplete, &light .cm-tooltip.cm-completionInfo':
{
border: '1px lightgray solid',
background: '#fefefe',
color: '#111',
boxShadow: '2px 3px 5px rgb(0 0 0 / 20%)',
},
'&dark .cm-tooltip.cm-tooltip-autocomplete, &dark .cm-tooltip.cm-completionInfo':
{
border: '1px #484747 solid',
boxShadow: '2px 3px 5px rgba(0, 0, 0, 0.51)',
background: '#25282c',
color: '#c1c1c1',
},
// match editor font family and font size, so the completion aligns with the text
'.cm-tooltip.cm-tooltip-autocomplete > ul': {
fontFamily: 'var(--source-font-family)',
fontSize: 'var(--font-size)',
},
'.cm-tooltip.cm-tooltip-autocomplete li[role="option"]': {
display: 'flex',
justifyContent: 'space-between',
lineHeight: 1.4, // increase the line height from default 1.2, for a larger target area
outline: '1px solid transparent',
},
'&light .cm-tooltip.cm-tooltip-autocomplete li[role="option"]:hover': {
outlineColor: '#abbffe',
backgroundColor: 'rgba(233, 233, 253, 0.4)',
},
'&dark .cm-tooltip.cm-tooltip-autocomplete li[role="option"]:hover': {
outlineColor: 'rgba(109, 150, 13, 0.8)',
backgroundColor: 'rgba(58, 103, 78, 0.62)',
},
'.cm-tooltip.cm-tooltip-autocomplete ul li[aria-selected]': {
color: 'inherit',
},
'&light .cm-tooltip.cm-tooltip-autocomplete ul li[aria-selected]': {
background: '#cad6fa',
},
'&dark .cm-tooltip.cm-tooltip-autocomplete ul li[aria-selected]': {
background: '#3a674e',
},
'.cm-completionMatchedText': {
textDecoration: 'none', // remove default underline,
fontWeight: 'bold',
},
'&light .cm-completionMatchedText': {
color: '#2d69c7',
},
'&dark .cm-completionMatchedText': {
color: '#93ca12',
},
'.ol-cm-completionType': {
paddingLeft: '1em',
paddingRight: 0,
width: 'auto',
fontSize: '90%',
fontFamily: 'var(--source-font-family)',
opacity: '0.5',
},
'.cm-completionInfo .ol-cm-symbolCompletionInfo': {
margin: 0,
whiteSpace: 'normal',
display: 'flex',
flexDirection: 'column',
alignItems: 'center',
textAlign: 'center',
},
'.cm-completionInfo .ol-cm-symbolCharacter': {
fontSize: '32px',
},
})