34 lines
847 B
TypeScript
34 lines
847 B
TypeScript
import { syscall } from "./lib/syscall.ts";
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export async function toggleH1() {
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await togglePrefix("# ");
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}
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export async function toggleH2() {
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await togglePrefix("## ");
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}
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function lookBack(s: string, pos: number, backString: string): boolean {
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return s.substring(pos - backString.length, pos) === backString;
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}
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async function togglePrefix(prefix: string) {
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let text = (await syscall("editor.getText")) as string;
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let pos = (await syscall("editor.getCursor")) as number;
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if (text[pos] === "\n") {
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pos--;
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}
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while (pos > 0 && text[pos] !== "\n") {
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if (lookBack(text, pos, prefix)) {
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// Already has this prefix, let's flip it
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await syscall("editor.replaceRange", pos - prefix.length, pos, "");
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return;
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}
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pos--;
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}
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if (pos) {
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pos++;
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}
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await syscall("editor.insertAtPos", prefix, pos);
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}
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