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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import React, { useCallback } from 'react';
import { Text, Box, Key } from 'ink';
import { Colors } from '../colors.js';
import { Suggestion } from './SuggestionsDisplay.js';
import { MultilineTextEditor } from './shared/multiline-editor.js';
import { useInputHistory } from '../hooks/useInputHistory.js';
interface InputPromptProps {
query: string;
onChange: (value: string) => void;
onChangeAndMoveCursor: (value: string) => void;
editorState: EditorState;
onSubmit: (value: string) => void;
showSuggestions: boolean;
suggestions: Suggestion[];
activeSuggestionIndex: number;
resetCompletion: () => void;
userMessages: readonly string[];
navigateSuggestionUp: () => void;
navigateSuggestionDown: () => void;
}
export interface EditorState {
key: number;
initialCursorOffset?: number;
}
export const InputPrompt: React.FC<InputPromptProps> = ({
query,
onChange,
onChangeAndMoveCursor,
editorState,
onSubmit,
showSuggestions,
suggestions,
activeSuggestionIndex,
userMessages,
navigateSuggestionUp,
navigateSuggestionDown,
resetCompletion,
}) => {
const handleSubmit = useCallback(
(submittedValue: string) => {
onSubmit(submittedValue);
onChangeAndMoveCursor(''); // Clear query after submit
},
[onSubmit, onChangeAndMoveCursor],
);
const inputHistory = useInputHistory({
userMessages,
onSubmit: handleSubmit,
isActive: !showSuggestions, // Input history is active when suggestions are not shown
currentQuery: query,
onChangeAndMoveCursor,
});
const handleAutocomplete = useCallback(
(indexToUse: number) => {
if (indexToUse < 0 || indexToUse >= suggestions.length) {
return;
}
const selectedSuggestion = suggestions[indexToUse];
const trimmedQuery = query.trimStart();
if (trimmedQuery.startsWith('/')) {
// Handle / command completion
const slashIndex = query.indexOf('/');
const base = query.substring(0, slashIndex + 1);
const newValue = base + selectedSuggestion.value;
onChangeAndMoveCursor(newValue);
onSubmit(newValue); // Execute the command
onChangeAndMoveCursor(''); // Clear query after submit
} else {
// Handle @ command completion
const atIndex = query.lastIndexOf('@');
if (atIndex === -1) return;
// Find the part of the query after the '@'
const pathPart = query.substring(atIndex + 1);
// Find the last slash within that part
const lastSlashIndexInPath = pathPart.lastIndexOf('/');
let base = '';
if (lastSlashIndexInPath === -1) {
// No slash after '@', replace everything after '@'
base = query.substring(0, atIndex + 1);
} else {
// Slash found, keep everything up to and including the last slash
base = query.substring(0, atIndex + 1 + lastSlashIndexInPath + 1);
}
const newValue = base + selectedSuggestion.value;
onChangeAndMoveCursor(newValue);
}
resetCompletion(); // Hide suggestions after selection
},
[query, suggestions, resetCompletion, onChangeAndMoveCursor, onSubmit],
);
const inputPreprocessor = useCallback(
(input: string, key: Key) => {
if (showSuggestions) {
if (key.upArrow) {
navigateSuggestionUp();
return true;
} else if (key.downArrow) {
navigateSuggestionDown();
return true;
} else if (key.tab) {
if (suggestions.length > 0) {
const targetIndex =
activeSuggestionIndex === -1 ? 0 : activeSuggestionIndex;
if (targetIndex < suggestions.length) {
handleAutocomplete(targetIndex);
return true;
}
}
} else if (key.return) {
if (activeSuggestionIndex >= 0) {
handleAutocomplete(activeSuggestionIndex);
} else {
if (query.trim()) {
handleSubmit(query);
}
}
return true;
} else if (key.escape) {
resetCompletion();
return true;
}
}
return false;
},
[
handleAutocomplete,
navigateSuggestionDown,
navigateSuggestionUp,
query,
suggestions,
showSuggestions,
resetCompletion,
activeSuggestionIndex,
handleSubmit,
],
);
return (
<Box borderStyle="round" borderColor={Colors.AccentBlue} paddingX={1}>
<Text color={Colors.AccentPurple}>> </Text>
<Box flexGrow={1}>
<MultilineTextEditor
key={editorState.key.toString()}
initialCursorOffset={editorState.initialCursorOffset}
initialText={query}
onChange={onChange}
placeholder="Enter your message or use tools (e.g., @src/file.txt)..."
/* Account for width used by the box and > */
navigateUp={inputHistory.navigateUp}
navigateDown={inputHistory.navigateDown}
inputPreprocessor={inputPreprocessor}
widthUsedByParent={3}
widthFraction={0.9}
onSubmit={() => {
// This onSubmit is for the TextInput component itself.
// It should only fire if suggestions are NOT showing,
// as inputPreprocessor handles Enter when suggestions are visible.
const trimmedQuery = query.trim();
if (!showSuggestions && trimmedQuery) {
handleSubmit(trimmedQuery);
}
}}
/>
</Box>
</Box>
);
};
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