clerk/internal/lsp/textdocument_completion.go (view raw)
Oleksandr Smirnov
Oleksandr Smirnov
olexsmir@gmail.com lsp: latin to cyrillic transliteration, 1 month ago
olexsmir@gmail.com lsp: latin to cyrillic transliteration, 1 month ago
| 1 | package lsp |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "fmt" |
| 6 | "math" |
| 7 | "sort" |
| 8 | "strings" |
| 9 | "time" |
| 10 | |
| 11 | "go.lsp.dev/protocol" |
| 12 | |
| 13 | "olexsmir.xyz/clerk/internal/analyzer" |
| 14 | "olexsmir.xyz/clerk/internal/lsp/fuzzy" |
| 15 | "olexsmir.xyz/clerk/internal/lsp/lsputil" |
| 16 | "olexsmir.xyz/clerk/journal/ast" |
| 17 | "olexsmir.xyz/clerk/journal/lexer" |
| 18 | "olexsmir.xyz/clerk/journal/token" |
| 19 | ) |
| 20 | |
| 21 | func (s *server) Completion(ctx context.Context, params *protocol.CompletionParams) (protocol.CompletionResult, error) { |
| 22 | state, ok := s.getDocState(params.TextDocument.URI) |
| 23 | if !ok { |
| 24 | return &protocol.CompletionList{}, nil |
| 25 | } |
| 26 | cursor := state.lineIdx.Offset(int(params.Position.Line), int(params.Position.Character)) |
| 27 | if cursor > len(state.text) { |
| 28 | return &protocol.CompletionList{}, nil |
| 29 | } |
| 30 | detectedCtx, start := detectCompletionCtx(state.text, cursor) |
| 31 | if detectedCtx == cmplNone { |
| 32 | return &protocol.CompletionList{}, nil |
| 33 | } |
| 34 | an := s.analysisFor(params.TextDocument.URI) |
| 35 | if an == nil { |
| 36 | return &protocol.CompletionList{}, nil |
| 37 | } |
| 38 | return &protocol.CompletionList{ |
| 39 | IsIncomplete: true, |
| 40 | Items: cmplItems(an, detectedCtx, state.text, state.lineIdx, start, cursor, s.latinToCyrillicCompletionEnabled()), |
| 41 | }, nil |
| 42 | } |
| 43 | |
| 44 | const maxCompletionItems = 50 |
| 45 | |
| 46 | type cmplCtx int |
| 47 | |
| 48 | const ( |
| 49 | cmplNone cmplCtx = iota |
| 50 | cmplAccount |
| 51 | cmplPayee |
| 52 | cmplCommodity |
| 53 | cmplDate |
| 54 | cmplTagName |
| 55 | cmplTagValue |
| 56 | cmplDirective |
| 57 | ) |
| 58 | |
| 59 | var directiveKeywords = []string{ |
| 60 | "account", "include", "commodity", "payee", "decimal-mark", "alias", |
| 61 | "apply", "end", "tag", "year", "D", "P", "N", "C", "Y", |
| 62 | } |
| 63 | |
| 64 | func detectCompletionCtx(content string, cursor int) (cmplCtx, int) { |
| 65 | toks := lexLine(content, cursor) |
| 66 | lineStart, _ := lineBounds(content, cursor) |
| 67 | if len(toks) == 0 { |
| 68 | return cmplDate, lineStart |
| 69 | } |
| 70 | if m := commentMarker(toks, cursor); m != -1 { |
| 71 | return cmplTagContext(content, toks[m].Span.End.Offset, cursor) |
| 72 | } |
| 73 | |
| 74 | switch toks[0].Type { |
| 75 | case token.INDENT: |
| 76 | return cmplPostingCtx(content, cursor, toks) |
| 77 | case token.DATE: |
| 78 | return cmplHeaderCtx(content, cursor, toks) |
| 79 | case token.ILLEGAL: |
| 80 | // a digit that is not lexed yet, as a date: 20, 2026-0 |
| 81 | if len(toks[0].Literal) > 0 && isDigitByte(toks[0].Literal[0]) { |
| 82 | return cmplHeaderCtx(content, cursor, toks) |
| 83 | } |
| 84 | return cmplNone, cursor |
| 85 | case token.ACCOUNT, token.COMMODITY, token.PAYEE, token.TAG: |
| 86 | return cmplDirectiveContext(cursor, lineStart, toks) |
| 87 | case token.P: |
| 88 | return cmplPriceContext(cursor, toks) |
| 89 | case token.TEXT: |
| 90 | return cmplDirective, lineStart // half-typed keyword or unparseable line |
| 91 | default: |
| 92 | return cmplNone, cursor |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | func cmplPostingCtx(content string, cursor int, toks []token.Token) (cmplCtx, int) { |
| 97 | if inDirectiveBody(content, cursor) { |
| 98 | return cmplNone, cursor |
| 99 | } |
| 100 | fieldStart := toks[0].Span.End.Offset |
| 101 | i := 1 |
| 102 | for i < len(toks) { |
| 103 | switch toks[i].Type { |
| 104 | case token.STAR, token.BANG, token.LPAREN, token.LBRACKET, token.WHITESPACE: |
| 105 | fieldStart = toks[i].Span.End.Offset |
| 106 | i++ |
| 107 | default: |
| 108 | goto run |
| 109 | } |
| 110 | } |
| 111 | run: |
| 112 | // account run: consecutive account-name segments and colons |
| 113 | fieldEnd := fieldStart |
| 114 | for ; i < len(toks); i++ { |
| 115 | if toks[i].Type != token.TEXT && toks[i].Type != token.COLON { |
| 116 | break |
| 117 | } |
| 118 | fieldEnd = toks[i].Span.End.Offset |
| 119 | } |
| 120 | if cursor <= fieldEnd && cursor >= fieldStart { |
| 121 | return cmplAccount, fieldStart |
| 122 | } |
| 123 | if cursor > fieldEnd { |
| 124 | if t := tokenUnder(toks, cursor); t != nil && (t.Type == token.COMMODITYMARK || t.Type == token.STRING) { |
| 125 | start := t.Span.Start.Offset |
| 126 | if t.Type == token.STRING { |
| 127 | start++ // skip opening quote |
| 128 | } |
| 129 | return cmplCommodity, start |
| 130 | } |
| 131 | if strings.TrimSpace(content[fieldEnd:cursor]) == "" { |
| 132 | return cmplCommodity, cursor |
| 133 | } |
| 134 | } |
| 135 | return cmplNone, cursor |
| 136 | } |
| 137 | |
| 138 | func cmplHeaderCtx(content string, cursor int, toks []token.Token) (cmplCtx, int) { |
| 139 | // cursor inside date token |
| 140 | if cursor >= toks[0].Span.Start.Offset && cursor <= toks[0].Span.End.Offset { |
| 141 | return cmplDate, toks[0].Span.Start.Offset |
| 142 | } |
| 143 | |
| 144 | // skip date, status, code, and whitespace - where the payee beginds |
| 145 | fieldStart := toks[0].Span.End.Offset |
| 146 | fieldEnd := fieldStart |
| 147 | seen := false |
| 148 | for _, t := range toks[1:] { |
| 149 | switch t.Type { |
| 150 | case token.WHITESPACE, token.STAR, token.BANG, token.DATE, token.TIME, |
| 151 | token.EQ, token.EQEQ, token.EQEQEQ: |
| 152 | fieldStart = t.Span.End.Offset |
| 153 | fieldEnd = t.Span.End.Offset |
| 154 | case token.TEXT: |
| 155 | lit := content[t.Span.Start.Offset:t.Span.End.Offset] |
| 156 | if !seen && len(lit) >= 2 && lit[0] == '(' && lit[len(lit)-1] == ')' { |
| 157 | fieldStart = t.Span.End.Offset // parenthesized code |
| 158 | fieldEnd = t.Span.End.Offset |
| 159 | continue |
| 160 | } |
| 161 | if !seen { |
| 162 | fieldStart = t.Span.Start.Offset |
| 163 | seen = true |
| 164 | } |
| 165 | fieldEnd = t.Span.End.Offset |
| 166 | if p := strings.IndexByte(lit, '|'); p >= 0 { |
| 167 | fieldEnd = t.Span.Start.Offset + p // "payee|note" keeps the pipe in the token |
| 168 | return payeeAt(cursor, fieldStart, fieldEnd) |
| 169 | } |
| 170 | case token.STRING: |
| 171 | if !seen { |
| 172 | fieldStart = t.Span.Start.Offset + 1 // skip opening quote |
| 173 | seen = true |
| 174 | } |
| 175 | fieldEnd = t.Span.End.Offset |
| 176 | default: // PIPE, SEMICOLON, ... |
| 177 | return payeeAt(cursor, fieldStart, fieldEnd) |
| 178 | } |
| 179 | } |
| 180 | if seen { |
| 181 | return payeeAt(cursor, fieldStart, fieldEnd) |
| 182 | } |
| 183 | // no payee yet: the payee field is the whitespace after the header meta |
| 184 | if cursor >= fieldStart && strings.TrimSpace(content[fieldStart:cursor]) == "" { |
| 185 | return cmplPayee, cursor |
| 186 | } |
| 187 | return cmplNone, cursor |
| 188 | } |
| 189 | |
| 190 | func payeeAt(cursor, start, end int) (cmplCtx, int) { |
| 191 | if cursor >= start && cursor <= end { |
| 192 | return cmplPayee, start |
| 193 | } |
| 194 | return cmplNone, cursor |
| 195 | } |
| 196 | |
| 197 | // cmplDirectiveContext classifies a directive line. keyword completion before the keyword ends, symbol completion in the value field after |
| 198 | func cmplDirectiveContext(cursor, lineStart int, toks []token.Token) (cmplCtx, int) { |
| 199 | kwEnd := toks[0].Span.End.Offset |
| 200 | if cursor <= kwEnd { |
| 201 | return cmplDirective, lineStart |
| 202 | } |
| 203 | start := kwEnd |
| 204 | for i := 1; i < len(toks); i++ { |
| 205 | if toks[i].Type == token.WHITESPACE || toks[i].Span.End.Offset <= kwEnd { |
| 206 | continue |
| 207 | } |
| 208 | start = toks[i].Span.Start.Offset |
| 209 | if toks[i].Type == token.STRING { |
| 210 | start++ // skip opening quote |
| 211 | } |
| 212 | break |
| 213 | } |
| 214 | if start > cursor { |
| 215 | start = cursor |
| 216 | } |
| 217 | switch toks[0].Type { |
| 218 | case token.ACCOUNT: |
| 219 | return cmplAccount, start |
| 220 | case token.COMMODITY: |
| 221 | return cmplCommodity, start |
| 222 | case token.PAYEE: |
| 223 | return cmplPayee, start |
| 224 | case token.TAG: |
| 225 | return cmplTagName, start |
| 226 | } |
| 227 | return cmplNone, cursor |
| 228 | } |
| 229 | |
| 230 | func cmplPriceContext(cursor int, toks []token.Token) (cmplCtx, int) { |
| 231 | kwEnd := toks[0].Span.End.Offset |
| 232 | if cursor > toks[0].Span.Start.Offset && cursor < kwEnd { |
| 233 | return cmplNone, cursor // on the P keyword |
| 234 | } |
| 235 | |
| 236 | dateStart := kwEnd // start of the date field, for replacing partials whole |
| 237 | dateDone := false // a DATE, TIME, or symbol has ended the date field |
| 238 | for _, t := range toks[1:] { // skip the P keyword |
| 239 | if t.Type == token.WHITESPACE { |
| 240 | continue |
| 241 | } |
| 242 | if !dateDone && dateStart == kwEnd { |
| 243 | dateStart = t.Span.Start.Offset |
| 244 | } |
| 245 | if cursor > t.Span.End.Offset { |
| 246 | switch t.Type { |
| 247 | case token.DATE, token.TIME, token.COMMODITYMARK, token.STRING: |
| 248 | dateDone = true |
| 249 | } |
| 250 | continue |
| 251 | } |
| 252 | if cursor < t.Span.Start.Offset { |
| 253 | if (t.Type == token.INT || t.Type == token.DECIMAL) && !dateDone { |
| 254 | return cmplDate, dateStart // partial date fragments ahead |
| 255 | } |
| 256 | if t.Type == token.DATE || t.Type == token.TIME { |
| 257 | return cmplNone, cursor |
| 258 | } |
| 259 | return cmplCommodity, cursor // symbol or price-commodity slot |
| 260 | } |
| 261 | |
| 262 | switch t.Type { |
| 263 | case token.DATE: |
| 264 | return cmplDate, t.Span.Start.Offset |
| 265 | case token.COMMODITYMARK: |
| 266 | return cmplCommodity, t.Span.Start.Offset |
| 267 | case token.STRING: |
| 268 | return cmplCommodity, min(t.Span.Start.Offset+1, cursor) // skip the opening quote |
| 269 | case token.TIME: |
| 270 | return cmplNone, cursor |
| 271 | case token.INT, token.DECIMAL: // a partial date fragment, or the amount quantity |
| 272 | if !dateDone { |
| 273 | return cmplDate, dateStart |
| 274 | } |
| 275 | if cursor == t.Span.End.Offset { |
| 276 | return cmplCommodity, cursor // suffix price-commodity slot |
| 277 | } |
| 278 | return cmplNone, cursor |
| 279 | } |
| 280 | } |
| 281 | // the cursor sits in whitespace after the last token, or only after the keyword |
| 282 | if !dateDone { |
| 283 | start := dateStart |
| 284 | if start == kwEnd { |
| 285 | start = cursor // `P `: the date comes next |
| 286 | } |
| 287 | return cmplDate, start |
| 288 | } |
| 289 | return cmplCommodity, cursor |
| 290 | } |
| 291 | |
| 292 | // commentStart completes tag names before ':' of the current tag and tag values after it |
| 293 | func cmplTagContext(content string, commentStart, cursor int) (cmplCtx, int) { |
| 294 | prefix := content[commentStart:cursor] |
| 295 | segStart := commentStart |
| 296 | seg := prefix |
| 297 | if comma := strings.LastIndexByte(prefix, ','); comma >= 0 { |
| 298 | segStart = commentStart + comma + 1 |
| 299 | seg = prefix[comma+1:] |
| 300 | } |
| 301 | if colon := strings.IndexByte(seg, ':'); colon >= 0 { |
| 302 | start := segStart + colon + 1 |
| 303 | for start < cursor && (content[start] == ' ' || content[start] == '\t') { |
| 304 | start++ |
| 305 | } |
| 306 | return cmplTagValue, start |
| 307 | } |
| 308 | keyStart := commentStart + lastSeparator(prefix) + 1 |
| 309 | return cmplTagName, keyStart |
| 310 | } |
| 311 | |
| 312 | // tagKeyAt returns the key of tag whose value region starts at start |
| 313 | func tagKeyAt(content string, start int) (string, bool) { |
| 314 | lineStart, _ := lineBounds(content, start) |
| 315 | segStart := lineStart |
| 316 | for i := start - 1; i >= lineStart; i-- { |
| 317 | switch content[i] { |
| 318 | case ',', ';', '#', '%': |
| 319 | segStart = i + 1 |
| 320 | i = lineStart - 1 // stop at the separator closest to start |
| 321 | } |
| 322 | } |
| 323 | colon := strings.IndexByte(content[segStart:start], ':') |
| 324 | if colon < 0 { |
| 325 | return "", false |
| 326 | } |
| 327 | colon += segStart |
| 328 | keyStart := lastSeparator(content[segStart:colon]) + 1 |
| 329 | key := content[segStart+keyStart : colon] |
| 330 | if key == "" { |
| 331 | return "", false |
| 332 | } |
| 333 | return key, true |
| 334 | } |
| 335 | |
| 336 | // commentMarker returns index of the first comment marker token at or before the cursor, or -1. |
| 337 | func commentMarker(toks []token.Token, cursor int) int { |
| 338 | for i, t := range toks { |
| 339 | switch t.Type { |
| 340 | case token.SEMICOLON, token.HASH, token.PERCENT: |
| 341 | if t.Span.Start.Offset <= cursor { |
| 342 | return i |
| 343 | } |
| 344 | case token.STAR: |
| 345 | if i == 0 && t.Span.Start.Offset <= cursor { |
| 346 | return i |
| 347 | } |
| 348 | } |
| 349 | } |
| 350 | return -1 |
| 351 | } |
| 352 | |
| 353 | func inDirectiveBody(content string, cursor int) bool { |
| 354 | lineStart, _ := lineBounds(content, cursor) |
| 355 | if toks := lexLine(content, lineStart); len(toks) == 0 || toks[0].Type != token.INDENT { |
| 356 | return false |
| 357 | } |
| 358 | for lineStart > 0 { |
| 359 | lineStart, _ = lineBounds(content, lineStart-1) |
| 360 | toks := lexLine(content, lineStart) |
| 361 | if len(toks) == 0 || toks[0].Type != token.INDENT { |
| 362 | return len(toks) > 0 && (toks[0].Type == token.ACCOUNT || toks[0].Type == token.COMMODITY) |
| 363 | } |
| 364 | } |
| 365 | return false |
| 366 | } |
| 367 | |
| 368 | type cmplCand struct { |
| 369 | label string |
| 370 | score float64 |
| 371 | count int |
| 372 | lastUsedDays int64 // days since 1970-01-01; 0 when unset |
| 373 | rank int // lower sorts first among equal scores; 0 except for date completions |
| 374 | } |
| 375 | |
| 376 | // cmplItems ranks candidates for the content against typed pattern |
| 377 | func cmplItems( |
| 378 | a *analyzer.Analysis, |
| 379 | ctx cmplCtx, |
| 380 | content string, |
| 381 | li *lsputil.LineIndex, |
| 382 | start, |
| 383 | cursor int, |
| 384 | transliterate bool, |
| 385 | ) []protocol.CompletionItem { |
| 386 | pattern := content[start:cursor] |
| 387 | |
| 388 | var kind protocol.CompletionItemKind |
| 389 | var cands []cmplCand |
| 390 | switch ctx { |
| 391 | case cmplAccount: |
| 392 | kind = protocol.CompletionItemKindClass |
| 393 | cands = make([]cmplCand, 0, len(a.Accounts)) |
| 394 | for name, info := range a.Accounts { |
| 395 | cands = append(cands, cmplCand{label: name, count: info.UsedCount, lastUsedDays: dateToDays(info.LastUsed)}) |
| 396 | } |
| 397 | case cmplPayee: |
| 398 | kind = protocol.CompletionItemKindVariable |
| 399 | cands = make([]cmplCand, 0, len(a.Payees)) |
| 400 | for name, info := range a.Payees { |
| 401 | cands = append(cands, cmplCand{label: name, count: info.UsedCount, lastUsedDays: dateToDays(info.LastUsed)}) |
| 402 | } |
| 403 | case cmplCommodity: |
| 404 | kind = protocol.CompletionItemKindValue |
| 405 | cands = make([]cmplCand, 0, len(a.Commodities)) |
| 406 | for name, info := range a.Commodities { |
| 407 | cands = append(cands, cmplCand{label: name, count: info.UsedCount, lastUsedDays: dateToDays(info.LastUsed)}) |
| 408 | } |
| 409 | case cmplTagName: |
| 410 | kind = protocol.CompletionItemKindProperty |
| 411 | cands = make([]cmplCand, 0, len(a.Tags)) |
| 412 | for name, info := range a.Tags { |
| 413 | cands = append(cands, cmplCand{label: name, count: info.UsedCount, lastUsedDays: dateToDays(info.LastUsed)}) |
| 414 | } |
| 415 | case cmplTagValue: |
| 416 | kind = protocol.CompletionItemKindProperty |
| 417 | if key, ok := tagKeyAt(content, start); ok { |
| 418 | if info, ok := a.Tags[key]; ok { |
| 419 | for _, v := range info.Values { |
| 420 | cands = append(cands, cmplCand{label: v}) |
| 421 | } |
| 422 | } |
| 423 | } |
| 424 | case cmplDirective: |
| 425 | kind = protocol.CompletionItemKindKeyword |
| 426 | for _, name := range directiveKeywords { |
| 427 | cands = append(cands, cmplCand{label: name}) |
| 428 | } |
| 429 | case cmplDate: |
| 430 | kind = protocol.CompletionItemKindConstant |
| 431 | now := time.Now() |
| 432 | sep, hasYear := dateStyle(a.DateStrings) |
| 433 | today := renderDate(now, sep, hasYear) |
| 434 | yesterday := renderDate(now.AddDate(0, 0, -1), sep, hasYear) |
| 435 | twoDaysAgo := renderDate(now.AddDate(0, 0, -2), sep, hasYear) |
| 436 | cands = append(cands, |
| 437 | cmplCand{label: today, rank: 0}, |
| 438 | cmplCand{label: yesterday, rank: 1}, |
| 439 | cmplCand{label: twoDaysAgo, rank: 2}) |
| 440 | |
| 441 | seen := map[string]bool{today: true, yesterday: true, twoDaysAgo: true} |
| 442 | for i, d := range a.Dates { |
| 443 | if !datePatternMatch(pattern, a.DateStrings[i]) { |
| 444 | continue |
| 445 | } |
| 446 | label := a.DateStrings[i] |
| 447 | if seen[label] { |
| 448 | continue |
| 449 | } |
| 450 | seen[label] = true |
| 451 | cands = append(cands, cmplCand{label: label, rank: 3, lastUsedDays: dateToDays(d)}) |
| 452 | } |
| 453 | default: |
| 454 | return nil |
| 455 | } |
| 456 | |
| 457 | var newest int64 // days since epoch of the newest transaction; 0 when none |
| 458 | if n := len(a.Dates); n > 0 { |
| 459 | newest = dateToDays(a.Dates[n-1]) |
| 460 | } |
| 461 | |
| 462 | matcher := fuzzy.Compile(pattern) |
| 463 | translMatcher, hasTransl := fuzzy.Matcher{}, false |
| 464 | if transliterate { |
| 465 | if t := latinToCyrillic(pattern); t != pattern { |
| 466 | translMatcher, hasTransl = fuzzy.Compile(t), true |
| 467 | } |
| 468 | } |
| 469 | ranked := cands[:0] |
| 470 | for i := range cands { |
| 471 | sc := matcher.Score(cands[i].label) |
| 472 | if hasTransl { |
| 473 | sc = max(sc, translMatcher.Score(cands[i].label)) |
| 474 | } |
| 475 | if sc != 0 { |
| 476 | sc *= 1 + math.Log1p(float64(cands[i].count)) |
| 477 | if cands[i].count > 0 && cands[i].lastUsedDays != 0 && newest != 0 { |
| 478 | days := newest - cands[i].lastUsedDays |
| 479 | sc *= 1 + 0.5*max(0, 1-float64(days)/365) |
| 480 | } |
| 481 | } |
| 482 | cands[i].score = sc |
| 483 | if sc != 0 { |
| 484 | ranked = append(ranked, cands[i]) |
| 485 | } |
| 486 | } |
| 487 | sort.Slice(ranked, func(i, j int) bool { |
| 488 | if ranked[i].score != ranked[j].score { |
| 489 | return ranked[i].score > ranked[j].score |
| 490 | } |
| 491 | if ranked[i].rank != ranked[j].rank { |
| 492 | return ranked[i].rank < ranked[j].rank |
| 493 | } |
| 494 | if ranked[i].lastUsedDays != ranked[j].lastUsedDays { |
| 495 | return ranked[i].lastUsedDays > ranked[j].lastUsedDays |
| 496 | } |
| 497 | return ranked[i].label < ranked[j].label |
| 498 | }) |
| 499 | if len(ranked) > maxCompletionItems { |
| 500 | ranked = ranked[:maxCompletionItems] |
| 501 | } |
| 502 | |
| 503 | end := cursor |
| 504 | if ctx == cmplDate { |
| 505 | end = dateTokenEnd(content, start) |
| 506 | } |
| 507 | items := make([]protocol.CompletionItem, len(ranked)) |
| 508 | for i, r := range ranked { |
| 509 | // nvim re-filters against the typed prefix, which a transliterated label never starts with; present the typed pattern as filterText. |
| 510 | filterText := r.label |
| 511 | if hasTransl && translMatcher.Score(r.label) > 0 { |
| 512 | filterText = pattern |
| 513 | } |
| 514 | it := protocol.CompletionItem{ |
| 515 | Label: r.label, |
| 516 | Kind: kind, |
| 517 | SortText: protocol.NewOptional(fmt.Sprintf("%04d", i)), |
| 518 | FilterText: protocol.NewOptional(filterText), |
| 519 | TextEdit: &protocol.TextEdit{ |
| 520 | Range: protocol.Range{ |
| 521 | Start: li.Position(start), |
| 522 | End: li.Position(end), |
| 523 | }, |
| 524 | NewText: r.label, |
| 525 | }, |
| 526 | } |
| 527 | if r.count > 0 { |
| 528 | it.Detail = protocol.NewOptional(fmt.Sprintf("%d uses", r.count)) |
| 529 | } |
| 530 | items[i] = it |
| 531 | } |
| 532 | return items |
| 533 | } |
| 534 | |
| 535 | // dateToDays converts a date to days since 1970-01-01; zero dates map to 0. |
| 536 | func dateToDays(d ast.Date) int64 { |
| 537 | if d.Year == 0 { |
| 538 | return 0 |
| 539 | } |
| 540 | return daysFromCivil(d.Year, d.Month, d.Day) |
| 541 | } |
| 542 | |
| 543 | // daysFromCivil converts a proleptic Gregorian date to days since 1970-01-01 |
| 544 | // (Howard Hinnant's algorithm). |
| 545 | func daysFromCivil(y, m, d int) int64 { |
| 546 | if m <= 2 { |
| 547 | y-- |
| 548 | } |
| 549 | era := y / 400 |
| 550 | yoe := y - era*400 |
| 551 | mp := (m + 9) % 12 |
| 552 | doy := (153*mp+2)/5 + d - 1 |
| 553 | doe := yoe*365 + yoe/4 - yoe/100 + doy |
| 554 | return int64(era)*146097 + int64(doe) - 719468 |
| 555 | } |
| 556 | |
| 557 | // dateStyle returns reparator and yesr-ness of the most recent history date. |
| 558 | // Defualts to '-'/true when history is empty. |
| 559 | func dateStyle(history []string) (sep byte, hasYear bool) { |
| 560 | sep, hasYear = '-', true |
| 561 | if n := len(history); n > 0 { |
| 562 | if i := strings.IndexAny(history[n-1], "-/."); i >= 0 { |
| 563 | return history[n-1][i], i == 4 |
| 564 | } |
| 565 | } |
| 566 | return |
| 567 | } |
| 568 | |
| 569 | func renderDate(t time.Time, sep byte, hasYear bool) string { |
| 570 | d := ast.Date{Month: int(t.Month()), Day: t.Day(), Sep: sep} |
| 571 | if hasYear { |
| 572 | d.Year = t.Year() |
| 573 | } |
| 574 | return d.String() |
| 575 | } |
| 576 | |
| 577 | func datePatternMatch(pattern, canonical string) bool { |
| 578 | pi, ci := 0, 0 |
| 579 | for pi < len(pattern) && ci < len(canonical) { |
| 580 | if pattern[pi] != canonical[ci] { |
| 581 | ci++ |
| 582 | continue |
| 583 | } |
| 584 | pi++ |
| 585 | ci++ |
| 586 | } |
| 587 | return pi == len(pattern) |
| 588 | } |
| 589 | |
| 590 | func isDateSepByte(b byte) bool { return b == '-' || b == '/' || b == '.' } |
| 591 | func isDigitByte(b byte) bool { return b >= '0' && b <= '9' } |
| 592 | |
| 593 | func dateTokenEnd(content string, start int) int { |
| 594 | i := start |
| 595 | for i < len(content) && (isDigitByte(content[i]) || isDateSepByte(content[i])) { |
| 596 | i++ |
| 597 | } |
| 598 | return i |
| 599 | } |
| 600 | |
| 601 | // lineBounds returns the byte offsets of the line containing cursor |
| 602 | func lineBounds(content string, cursor int) (start, end int) { |
| 603 | start = cursor |
| 604 | for start > 0 && content[start-1] != '\n' && content[start-1] != '\r' { |
| 605 | start-- |
| 606 | } |
| 607 | end = start |
| 608 | for end < len(content) && content[end] != '\n' && content[end] != '\r' { |
| 609 | end++ |
| 610 | } |
| 611 | return start, end |
| 612 | } |
| 613 | |
| 614 | func lastSeparator(s string) int { |
| 615 | for i := len(s) - 1; i >= 0; i-- { |
| 616 | switch s[i] { |
| 617 | case ' ', '\t', ',': |
| 618 | return i |
| 619 | } |
| 620 | } |
| 621 | return -1 |
| 622 | } |
| 623 | |
| 624 | func lexLine(content string, cursor int) []token.Token { |
| 625 | lineStart, lineEnd := lineBounds(content, cursor) |
| 626 | l := lexer.New("", []byte(content[lineStart:lineEnd])) |
| 627 | var out []token.Token |
| 628 | for { |
| 629 | t := l.Next() |
| 630 | if t.Type == token.EOF || t.Type == token.NEWLINE { |
| 631 | break |
| 632 | } |
| 633 | t.Span.Start.Offset += lineStart |
| 634 | t.Span.End.Offset += lineStart |
| 635 | out = append(out, t) |
| 636 | } |
| 637 | return out |
| 638 | } |
| 639 | |
| 640 | func tokenUnder(toks []token.Token, cursor int) *token.Token { |
| 641 | for i := range toks { |
| 642 | t := &toks[i] |
| 643 | if t.Span.Start.Offset <= cursor && cursor <= t.Span.End.Offset { |
| 644 | return t |
| 645 | } |
| 646 | } |
| 647 | return nil |
| 648 | } |