mirror of
https://github.com/getpaseo/paseo.git
synced 2026-11-10 18:35:17 +00:00
Mohamed Boudra
6f07b0de48
Fixing a prompt after interrupting it, or retrying one after a provider error, meant scrolling up and copying it out of the chat. Up in an empty agent composer now fills the last message sent to that agent; Up walks older, Down walks newer and past the newest back to empty. History is read from the loaded timeline on key press, not kept in a separate store, so it follows rewinds, reloads and other devices and costs nothing while a turn streams. Recall only starts from an empty composer, so it never discards a half-written draft. While a recalled message is unedited the autocomplete stays hidden, otherwise a recalled `/command` would open the picker and Enter would pick an option instead of sending.
69 lines
2.2 KiB
TypeScript
69 lines
2.2 KiB
TypeScript
import type { ComposerKeyPressEvent } from "@/composer/input/input";
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interface RecalledMessage {
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index: number;
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text: string;
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}
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/**
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* Walks the messages already sent to an agent from an empty composer, like a
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* shell's Up/Down history. A message stays recalled only while the composer
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* still holds its exact text; the first edit hands the arrows back to the caret.
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*/
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export class ComposerRecall {
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private recalled: RecalledMessage | null = null;
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/** True while the composer shows a recalled message the user has not edited. */
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isShowing(text: string): boolean {
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return this.recalled !== null && this.recalled.text === text;
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}
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/**
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* Returns the text the composer should show for this key press, or null to
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* leave the key to the input. `readSentMessages` is newest first and is only
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* read for keys recall acts on.
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*/
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handleKeyPress(
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event: ComposerKeyPressEvent,
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readSentMessages: () => readonly string[],
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): string | null {
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if (event.key !== "ArrowUp" && event.key !== "ArrowDown") return null;
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if (event.hasModifier) return null;
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const { text, selection } = event.input;
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if (selection.start !== selection.end) return null;
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const recalled = this.isShowing(text) ? this.recalled : null;
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if (!recalled) {
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this.recalled = null;
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if (event.key !== "ArrowUp" || text.length > 0) return null;
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return this.show(readSentMessages(), 0);
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}
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if (event.key === "ArrowUp") {
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if (!isCaretOnFirstLine(text, selection.start)) return null;
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return this.show(readSentMessages(), recalled.index + 1);
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}
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if (!isCaretOnLastLine(text, selection.start)) return null;
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if (recalled.index === 0) {
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this.recalled = null;
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return "";
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}
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return this.show(readSentMessages(), recalled.index - 1);
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}
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private show(messages: readonly string[], index: number): string | null {
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const text = messages[index];
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if (text === undefined) return null;
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this.recalled = { index, text };
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return text;
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}
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}
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function isCaretOnFirstLine(text: string, caret: number): boolean {
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return !text.slice(0, caret).includes("\n");
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}
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function isCaretOnLastLine(text: string, caret: number): boolean {
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return !text.slice(caret).includes("\n");
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}
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