export type ComposerTriggerKind = "path" | "slash-command" | "slash-model"; export interface ComposerTrigger { kind: ComposerTriggerKind; query: string; rangeStart: number; rangeEnd: number;} function clampCursor(text: string, cursor: number): number { if (!Number.isFinite(cursor)) return text.length; return Math.max(0, Math.min(text.length, Math.floor(cursor)));} function isWhitespace(char: string): boolean { return char === " " || char === "\n" || char === "\t" || char === "\r";} function tokenStartForCursor(text: string, cursor: number): number { let index = cursor - 1; while (index >= 0 && !isWhitespace(text[index] ?? "")) { index -= 1; } return index + 1;} export function detectComposerTrigger(text: string, cursorInput: number): ComposerTrigger | null { const cursor = clampCursor(text, cursorInput); const lineStart = text.lastIndexOf("\n", Math.max(0, cursor - 1)) + 1; const linePrefix = text.slice(lineStart, cursor); if (linePrefix.startsWith("/")) { const commandMatch = /^\/(\S*)$/.exec(linePrefix); if (commandMatch) { const commandQuery = commandMatch[1] ?? ""; if (commandQuery.toLowerCase() === "model") { return { kind: "slash-model", query: "", rangeStart: lineStart, rangeEnd: cursor, }; } if ("model".startsWith(commandQuery.toLowerCase())) { return { kind: "slash-command", query: commandQuery, rangeStart: lineStart, rangeEnd: cursor, }; } return null; } const modelMatch = /^\/model(?:\s+(.*))?$/.exec(linePrefix); if (modelMatch) { return { kind: "slash-model", query: (modelMatch[1] ?? "").trim(), rangeStart: lineStart, rangeEnd: cursor, }; } } const tokenStart = tokenStartForCursor(text, cursor); const token = text.slice(tokenStart, cursor); if (!token.startsWith("@")) { return null; } return { kind: "path", query: token.slice(1), rangeStart: tokenStart, rangeEnd: cursor, };} export function replaceTextRange( text: string, rangeStart: number, rangeEnd: number, replacement: string,): { text: string; cursor: number } { const safeStart = Math.max(0, Math.min(text.length, rangeStart)); const safeEnd = Math.max(safeStart, Math.min(text.length, rangeEnd)); const nextText = `${text.slice(0, safeStart)}${replacement}${text.slice(safeEnd)}`; return { text: nextText, cursor: safeStart + replacement.length };}
export type ComposerTriggerKind = "path" | "slash-command" | "slash-model";
export interface ComposerTrigger {
kind: ComposerTriggerKind;
query: string;
rangeStart: number;
rangeEnd: number;
}
function clampCursor(text: string, cursor: number): number {
if (!Number.isFinite(cursor)) return text.length;
return Math.max(0, Math.min(text.length, Math.floor(cursor)));
}
function isWhitespace(char: string): boolean {
return char === " " || char === "\n" || char === "\t" || char === "\r";
}
function tokenStartForCursor(text: string, cursor: number): number {
let index = cursor - 1;
while (index >= 0 && !isWhitespace(text[index] ?? "")) {
index -= 1;
}
return index + 1;
}
export function detectComposerTrigger(text: string, cursorInput: number): ComposerTrigger | null {
const cursor = clampCursor(text, cursorInput);
const lineStart = text.lastIndexOf("\n", Math.max(0, cursor - 1)) + 1;
const linePrefix = text.slice(lineStart, cursor);
if (linePrefix.startsWith("/")) {
const commandMatch = /^\/(\S*)$/.exec(linePrefix);
if (commandMatch) {
const commandQuery = commandMatch[1] ?? "";
if (commandQuery.toLowerCase() === "model") {
return {
kind: "slash-model",
query: "",
rangeStart: lineStart,
rangeEnd: cursor,
};
}
if ("model".startsWith(commandQuery.toLowerCase())) {
return {
kind: "slash-command",
query: commandQuery,
rangeStart: lineStart,
rangeEnd: cursor,
};
}
return null;
}
const modelMatch = /^\/model(?:\s+(.*))?$/.exec(linePrefix);
if (modelMatch) {
return {
kind: "slash-model",
query: (modelMatch[1] ?? "").trim(),
rangeStart: lineStart,
rangeEnd: cursor,
};
}
}
const tokenStart = tokenStartForCursor(text, cursor);
const token = text.slice(tokenStart, cursor);
if (!token.startsWith("@")) {
return null;
}
return {
kind: "path",
query: token.slice(1),
rangeStart: tokenStart,
rangeEnd: cursor,
};
}
export function replaceTextRange(
text: string,
rangeStart: number,
rangeEnd: number,
replacement: string,
): { text: string; cursor: number } {
const safeStart = Math.max(0, Math.min(text.length, rangeStart));
const safeEnd = Math.max(safeStart, Math.min(text.length, rangeEnd));
const nextText = `${text.slice(0, safeStart)}${replacement}${text.slice(safeEnd)}`;
return { text: nextText, cursor: safeStart + replacement.length };
}