clerk/internal/lsp/completion.go (view raw)
| 1 | package lsp |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "slices" |
| 6 | "strings" |
| 7 | |
| 8 | "go.lsp.dev/protocol" |
| 9 | |
| 10 | "olexsmir.xyz/clerk/journal/semantic" |
| 11 | ) |
| 12 | |
| 13 | func (s *server) Completion(ctx context.Context, params *protocol.CompletionParams) (protocol.CompletionResult, error) { |
| 14 | text, ok := s.getDocText(params.TextDocument.URI) |
| 15 | if !ok { |
| 16 | return &protocol.CompletionList{IsIncomplete: false}, nil |
| 17 | } |
| 18 | |
| 19 | lines := strings.Split(text, "\n") |
| 20 | lineIdx := int(params.Position.Line) |
| 21 | if lineIdx >= len(lines) { |
| 22 | lineIdx = len(lines) - 1 |
| 23 | } |
| 24 | if lineIdx < 0 { |
| 25 | lineIdx = 0 |
| 26 | } |
| 27 | |
| 28 | currentLine := lines[lineIdx] |
| 29 | col := min(params.Position.Character, uint32(len(currentLine))) |
| 30 | |
| 31 | prefix := currentLine[:col] |
| 32 | kind, word := detectKind(prefix) |
| 33 | |
| 34 | s.semaMu.RLock() |
| 35 | sema := s.semanticCtx |
| 36 | s.semaMu.RUnlock() |
| 37 | |
| 38 | var items []protocol.CompletionItem |
| 39 | switch kind { |
| 40 | case complAccount: |
| 41 | items = completeAccounts(sema, word) |
| 42 | case complPayee: |
| 43 | items = completePayees(sema, word) |
| 44 | case complCommodity: |
| 45 | items = completeCommodities(sema, word) |
| 46 | case complKeyword: |
| 47 | items = completeKeywords(word) |
| 48 | } |
| 49 | if items == nil { |
| 50 | items = []protocol.CompletionItem{} |
| 51 | } |
| 52 | |
| 53 | return &protocol.CompletionList{ |
| 54 | IsIncomplete: false, |
| 55 | Items: items, |
| 56 | }, nil |
| 57 | } |
| 58 | |
| 59 | type completionKind int |
| 60 | |
| 61 | const ( |
| 62 | complNone completionKind = iota |
| 63 | complAccount |
| 64 | complPayee |
| 65 | complCommodity |
| 66 | complKeyword |
| 67 | ) |
| 68 | |
| 69 | func detectKind(prefix string) (completionKind, string) { |
| 70 | if prefix == "" { |
| 71 | return complNone, "" |
| 72 | } |
| 73 | |
| 74 | trimmed := strings.TrimLeft(prefix, " \t") |
| 75 | if trimmed == "" { |
| 76 | return complNone, "" |
| 77 | } |
| 78 | |
| 79 | c := prefix[0] |
| 80 | |
| 81 | // posting line: starts with indentation |
| 82 | if c == ' ' || c == '\t' { |
| 83 | content := strings.TrimLeft(trimmed, "!* ([") |
| 84 | if _, after, ok := strings.Cut(content, " "); ok { |
| 85 | // after := strings.TrimLeft(after, " \t") |
| 86 | if n := strings.LastIndexAny(after, " \t"); n >= 0 { // last field (after whitespace) |
| 87 | return complCommodity, after[n+1:] |
| 88 | } |
| 89 | return complCommodity, after |
| 90 | } |
| 91 | return complAccount, content |
| 92 | } |
| 93 | |
| 94 | // directive keywords at line start |
| 95 | if kw, rest := matchKeyword(trimmed); kw != "" { |
| 96 | switch kw { |
| 97 | case "account", "alias": |
| 98 | return complAccount, rest |
| 99 | case "payee": |
| 100 | return complPayee, rest |
| 101 | case "commodity", "D", "P", "N": |
| 102 | return complCommodity, rest |
| 103 | } |
| 104 | return complNone, "" |
| 105 | } |
| 106 | |
| 107 | // after date, transaction header |
| 108 | if c >= '0' && c <= '9' { |
| 109 | return complPayee, skipTransactionPreamble(trimmed) |
| 110 | } |
| 111 | |
| 112 | // partial keyword on unknown line |
| 113 | if (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') { |
| 114 | return complKeyword, trimmed |
| 115 | } |
| 116 | |
| 117 | return complNone, "" |
| 118 | } |
| 119 | |
| 120 | func matchKeyword(trimmed string) (keyword, rest string) { |
| 121 | i := 0 |
| 122 | for i < len(trimmed) && trimmed[i] != ' ' && trimmed[i] != '\t' { |
| 123 | i++ |
| 124 | } |
| 125 | if i == 0 { |
| 126 | return "", "" |
| 127 | } |
| 128 | word := trimmed[:i] |
| 129 | switch word { |
| 130 | case "account", "alias", "payee", "commodity", |
| 131 | "include", "tag", "apply", "end", |
| 132 | "year", "Y", "decimal-mark", |
| 133 | "D", "P", "N", "C", "comment": |
| 134 | default: |
| 135 | return "", "" |
| 136 | } |
| 137 | rest = strings.TrimLeft(trimmed[i:], " \t") |
| 138 | return word, rest |
| 139 | } |
| 140 | |
| 141 | func skipTransactionPreamble(trimmed string) string { |
| 142 | // Skip date (digits and date separators) |
| 143 | i := 0 |
| 144 | for i < len(trimmed) { |
| 145 | c := trimmed[i] |
| 146 | if (c >= '0' && c <= '9') || c == '/' || c == '-' || c == '.' { |
| 147 | i++ |
| 148 | } else { |
| 149 | break |
| 150 | } |
| 151 | } |
| 152 | after := trimmed[i:] |
| 153 | |
| 154 | // Skip whitespace, status markers, and code in parens |
| 155 | for { |
| 156 | before := after |
| 157 | after = strings.TrimLeft(after, " \t") |
| 158 | if len(after) > 0 && (after[0] == '*' || after[0] == '!') { |
| 159 | after = after[1:] |
| 160 | continue |
| 161 | } |
| 162 | if len(after) > 0 && after[0] == '(' { |
| 163 | end := strings.IndexByte(after, ')') |
| 164 | if end >= 0 { |
| 165 | after = after[end+1:] |
| 166 | continue |
| 167 | } |
| 168 | } |
| 169 | if after == before { |
| 170 | break |
| 171 | } |
| 172 | } |
| 173 | return after |
| 174 | } |
| 175 | |
| 176 | func completeAccounts(sema *semantic.Context, prefix string) []protocol.CompletionItem { |
| 177 | if sema == nil || prefix == "" { |
| 178 | return nil |
| 179 | } |
| 180 | var items []protocol.CompletionItem |
| 181 | for name := range sema.Accounts { |
| 182 | if strings.HasPrefix(name, prefix) { |
| 183 | items = append(items, protocol.CompletionItem{ |
| 184 | Label: name, |
| 185 | Kind: protocol.CompletionItemKindVariable, |
| 186 | // Detail: protocol.NewOptional("account"), |
| 187 | }) |
| 188 | } |
| 189 | } |
| 190 | slices.SortFunc(items, func(a, b protocol.CompletionItem) int { |
| 191 | return strings.Compare(a.Label, b.Label) |
| 192 | }) |
| 193 | return items |
| 194 | } |
| 195 | |
| 196 | func completePayees(sema *semantic.Context, prefix string) []protocol.CompletionItem { |
| 197 | if sema == nil { |
| 198 | return nil |
| 199 | } |
| 200 | var items []protocol.CompletionItem |
| 201 | for name := range sema.Payees { |
| 202 | if prefix != "" && !strings.HasPrefix(name, prefix) { |
| 203 | continue |
| 204 | } |
| 205 | items = append(items, protocol.CompletionItem{ |
| 206 | Label: name, |
| 207 | Kind: protocol.CompletionItemKindText, |
| 208 | // Detail: protocol.NewOptional("payee"), |
| 209 | }) |
| 210 | } |
| 211 | slices.SortFunc(items, func(a, b protocol.CompletionItem) int { |
| 212 | return strings.Compare(a.Label, b.Label) |
| 213 | }) |
| 214 | return items |
| 215 | } |
| 216 | |
| 217 | func completeCommodities(sema *semantic.Context, prefix string) []protocol.CompletionItem { |
| 218 | if sema == nil { |
| 219 | return nil |
| 220 | } |
| 221 | var items []protocol.CompletionItem |
| 222 | for name := range sema.Commodities { |
| 223 | if prefix != "" && !strings.HasPrefix(name, prefix) { |
| 224 | continue |
| 225 | } |
| 226 | items = append(items, protocol.CompletionItem{ |
| 227 | Label: name, |
| 228 | Kind: protocol.CompletionItemKindConstant, |
| 229 | // Detail: protocol.NewOptional("commodity"), |
| 230 | }) |
| 231 | } |
| 232 | slices.SortFunc(items, func(a, b protocol.CompletionItem) int { |
| 233 | return strings.Compare(a.Label, b.Label) |
| 234 | }) |
| 235 | return items |
| 236 | } |
| 237 | |
| 238 | // keywords |
| 239 | |
| 240 | type keywordInfo struct { |
| 241 | label, detail string |
| 242 | } |
| 243 | |
| 244 | var directiveKeywords = []keywordInfo{ |
| 245 | {"account", "define an account"}, |
| 246 | {"alias", "alias an account name"}, |
| 247 | {"apply", "apply a directive"}, |
| 248 | {"comment", "comment block"}, |
| 249 | {"commodity", "define a commodity"}, |
| 250 | {"decimal-mark", "set decimal mark"}, |
| 251 | {"end", "end a scoped directive"}, |
| 252 | {"include", "include another file"}, |
| 253 | {"payee", "define a payee"}, |
| 254 | {"tag", "define a tag"}, |
| 255 | {"year", "set default year"}, |
| 256 | {"C", "commodity conversion"}, |
| 257 | {"D", "set default commodity"}, |
| 258 | {"N", "ignored price"}, |
| 259 | {"P", "market price"}, |
| 260 | {"Y", "set default year"}, |
| 261 | } |
| 262 | |
| 263 | func completeKeywords(prefix string) []protocol.CompletionItem { |
| 264 | var items []protocol.CompletionItem |
| 265 | for _, kw := range directiveKeywords { |
| 266 | if !strings.HasPrefix(kw.label, prefix) { |
| 267 | continue |
| 268 | } |
| 269 | items = append(items, protocol.CompletionItem{ |
| 270 | Label: kw.label, |
| 271 | Kind: protocol.CompletionItemKindKeyword, |
| 272 | Detail: protocol.NewOptional(kw.detail), |
| 273 | }) |
| 274 | } |
| 275 | return items |
| 276 | } |