1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { useState, useEffect, useCallback } from 'react';
import * as fs from 'fs/promises';
import * as path from 'path';
import { isNodeError } from '@gemini-code/server';
const MAX_SUGGESTIONS_TO_SHOW = 8;
export interface UseCompletionReturn {
suggestions: string[];
activeSuggestionIndex: number;
visibleStartIndex: number;
showSuggestions: boolean;
isLoadingSuggestions: boolean;
setActiveSuggestionIndex: React.Dispatch<React.SetStateAction<number>>;
setShowSuggestions: React.Dispatch<React.SetStateAction<boolean>>;
resetCompletionState: () => void;
navigateUp: () => void;
navigateDown: () => void;
}
export function useCompletion(
query: string,
cwd: string,
isActive: boolean,
): UseCompletionReturn {
const [suggestions, setSuggestions] = useState<string[]>([]);
const [activeSuggestionIndex, setActiveSuggestionIndex] =
useState<number>(-1);
const [visibleStartIndex, setVisibleStartIndex] = useState<number>(0);
const [showSuggestions, setShowSuggestions] = useState<boolean>(false);
const [isLoadingSuggestions, setIsLoadingSuggestions] =
useState<boolean>(false);
const resetCompletionState = useCallback(() => {
setSuggestions([]);
setActiveSuggestionIndex(-1);
setVisibleStartIndex(0);
setShowSuggestions(false);
setIsLoadingSuggestions(false);
}, []);
// --- Navigation Logic ---
const navigateUp = useCallback(() => {
if (suggestions.length === 0) return;
setActiveSuggestionIndex((prevIndex) => {
const newIndex = prevIndex <= 0 ? suggestions.length - 1 : prevIndex - 1;
// Adjust visible window if needed (scrolling up)
if (newIndex < visibleStartIndex) {
setVisibleStartIndex(newIndex);
} else if (
newIndex === suggestions.length - 1 &&
suggestions.length > MAX_SUGGESTIONS_TO_SHOW
) {
// Handle wrapping from first to last item
setVisibleStartIndex(
Math.max(0, suggestions.length - MAX_SUGGESTIONS_TO_SHOW),
);
}
return newIndex;
});
}, [suggestions.length, visibleStartIndex]);
const navigateDown = useCallback(() => {
if (suggestions.length === 0) return;
setActiveSuggestionIndex((prevIndex) => {
const newIndex = prevIndex >= suggestions.length - 1 ? 0 : prevIndex + 1;
// Adjust visible window if needed (scrolling down)
if (newIndex >= visibleStartIndex + MAX_SUGGESTIONS_TO_SHOW) {
setVisibleStartIndex(visibleStartIndex + 1);
} else if (
newIndex === 0 &&
suggestions.length > MAX_SUGGESTIONS_TO_SHOW
) {
// Handle wrapping from last to first item
setVisibleStartIndex(0);
}
return newIndex;
});
}, [suggestions.length, visibleStartIndex]);
// --- End Navigation Logic ---
useEffect(() => {
if (!isActive) {
resetCompletionState();
return;
}
const atIndex = query.lastIndexOf('@');
if (atIndex === -1) {
resetCompletionState();
return;
}
const partialPath = query.substring(atIndex + 1);
const lastSlashIndex = partialPath.lastIndexOf('/');
const baseDirRelative =
lastSlashIndex === -1
? '.'
: partialPath.substring(0, lastSlashIndex + 1);
const prefix =
lastSlashIndex === -1
? partialPath
: partialPath.substring(lastSlashIndex + 1);
const baseDirAbsolute = path.resolve(cwd, baseDirRelative);
let isMounted = true;
const fetchSuggestions = async () => {
setIsLoadingSuggestions(true);
try {
const entries = await fs.readdir(baseDirAbsolute, {
withFileTypes: true,
});
const filteredSuggestions = entries
.filter((entry) => entry.name.startsWith(prefix))
.map((entry) => (entry.isDirectory() ? entry.name + '/' : entry.name))
.sort((a, b) => {
// Sort directories first, then alphabetically
const aIsDir = a.endsWith('/');
const bIsDir = b.endsWith('/');
if (aIsDir && !bIsDir) return -1;
if (!aIsDir && bIsDir) return 1;
return a.localeCompare(b);
});
if (isMounted) {
setSuggestions(filteredSuggestions);
setShowSuggestions(filteredSuggestions.length > 0);
setActiveSuggestionIndex(-1); // Reset selection on new suggestions
setVisibleStartIndex(0); // Reset scroll on new suggestions
}
} catch (error) {
if (isNodeError(error) && error.code === 'ENOENT') {
// Directory doesn't exist, likely mid-typing, clear suggestions
if (isMounted) {
setSuggestions([]);
setShowSuggestions(false);
}
} else {
console.error(
`Error fetching completion suggestions for ${baseDirAbsolute}:`,
error,
);
if (isMounted) {
resetCompletionState();
}
}
}
if (isMounted) {
setIsLoadingSuggestions(false);
}
};
// Debounce the fetch slightly
const debounceTimeout = setTimeout(fetchSuggestions, 100);
return () => {
isMounted = false;
clearTimeout(debounceTimeout);
// Don't reset loading state here, let the next effect handle it or resetCompletionState
};
}, [query, cwd, isActive, resetCompletionState]);
return {
suggestions,
activeSuggestionIndex,
visibleStartIndex,
showSuggestions,
isLoadingSuggestions,
setActiveSuggestionIndex,
setShowSuggestions,
resetCompletionState,
navigateUp,
navigateDown,
};
}
|
