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chore(code): support multiple selections in tab

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Elian Doran 2025-05-11 17:59:44 +03:00
parent 4bac03570c
commit 8d18823608
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1 changed files with 26 additions and 19 deletions
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45
packages/codemirror/src/extensions/custom_tab.ts
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@ -1,38 +1,45 @@
import { indentLess, indentMore } from "@codemirror/commands";
import { EditorSelection, type ChangeSpec } from "@codemirror/state";
import type { KeyBinding } from "@codemirror/view";
const smartIndentWithTab: KeyBinding[] = [
{
key: "Tab",
run({ state, dispatch}) {
run({ state, dispatch }) {
const { selection } = state;
for (const range of selection.ranges) {
if (!range.empty) {
// Allow default behaviour.
return false;
}
// Handle selection indenting normally
if (selection.ranges.some(range => !range.empty)) {
return indentMore({ state, dispatch });
}
const changes = [];
const newSelections = [];
for (let range of selection.ranges) {
const line = state.doc.lineAt(range.head);
const beforeCursor = state.doc.sliceString(line.from, range.head);
if (/^\s*$/.test(beforeCursor)) {
// Only whitespace before cursor: indent line
return indentMore({state, dispatch});
// Only whitespace before cursor → indent line
return indentMore({ state, dispatch });
} else {
// Insert a tab character
const cursor = range.head;
dispatch(state.update({
changes: {
from: cursor,
insert: "\t"
},
selection: { anchor: cursor + 1 },
// Insert a tab character at cursor
changes.push({ from: range.head, to: range.head, insert: "\t" });
newSelections.push(EditorSelection.cursor(range.head + 1));
}
}
if (changes.length) {
dispatch(
state.update({
changes,
selection: EditorSelection.create(newSelections),
scrollIntoView: true,
userEvent: "input"
}));
return true;
}
})
);
return true;
}
return false;