1
0
mirror of https://github.com/laurent22/joplin.git synced 2024-12-24 10:27:10 +02:00
joplin/packages/editor/CodeMirror/utils/formatting/toggleInlineRegionSurrounded.ts

67 lines
1.9 KiB
TypeScript
Raw Normal View History

import { Text as DocumentText, EditorSelection, SelectionRange } from '@codemirror/state';
import { RegionSpec } from './RegionSpec';
import findInlineMatch, { MatchSide } from './findInlineMatch';
import { SelectionUpdate } from './types';
// Toggles whether the given selection matches the inline region specified by [spec].
//
// For example, something similar to toggleSurrounded('**', '**') would surround
// every selection range with asterisks (including the caret).
// If the selection is already surrounded by these characters, they are
// removed.
const toggleInlineRegionSurrounded = (
doc: DocumentText, sel: SelectionRange, spec: RegionSpec,
): SelectionUpdate => {
let content = doc.sliceString(sel.from, sel.to);
const startMatchLen = findInlineMatch(doc, spec, sel, MatchSide.Start);
const endMatchLen = findInlineMatch(doc, spec, sel, MatchSide.End);
const startsWithBefore = startMatchLen >= 0;
const endsWithAfter = endMatchLen >= 0;
const changes = [];
let finalSelStart = sel.from;
let finalSelEnd = sel.to;
if (startsWithBefore && endsWithAfter) {
// Remove the before and after.
content = content.substring(startMatchLen);
content = content.substring(0, content.length - endMatchLen);
finalSelEnd -= startMatchLen + endMatchLen;
changes.push({
from: sel.from,
to: sel.to,
insert: content,
});
} else {
changes.push({
from: sel.from,
insert: spec.template.start,
});
changes.push({
from: sel.to,
insert: spec.template.end,
});
// If not a caret,
if (!sel.empty) {
// Select the surrounding chars.
finalSelEnd += spec.template.start.length + spec.template.end.length;
} else {
// Position the caret within the added content.
finalSelStart = sel.from + spec.template.start.length;
finalSelEnd = finalSelStart;
}
}
return {
changes,
range: EditorSelection.range(finalSelStart, finalSelEnd),
};
};
export default toggleInlineRegionSurrounded;