clerk/internal/lsp/textdocument_format.go (view raw)
| 1 | package lsp |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "fmt" |
| 6 | "strings" |
| 7 | |
| 8 | "go.lsp.dev/protocol" |
| 9 | |
| 10 | "olexsmir.xyz/clerk/journal/lexer" |
| 11 | "olexsmir.xyz/clerk/journal/parser" |
| 12 | ) |
| 13 | |
| 14 | func (s *server) Formatting(ctx context.Context, params *protocol.DocumentFormattingParams) ([]protocol.TextEdit, error) { |
| 15 | state, ok := s.getDocState(params.TextDocument.URI) |
| 16 | if !ok { |
| 17 | return nil, nil |
| 18 | } |
| 19 | |
| 20 | text := state.text |
| 21 | lex := lexer.New(params.TextDocument.URI.Path(), []byte(text)) |
| 22 | jnrl := parser.New(lex).ParseJournal() |
| 23 | if len(jnrl.Errors) > 0 { |
| 24 | return nil, fmt.Errorf("can't format file with errors: %v", jnrl.Errors[0].Message) // TODO: report all errors |
| 25 | } |
| 26 | |
| 27 | var buf strings.Builder |
| 28 | if err := s.printer.Fprint(&buf, jnrl); err != nil { |
| 29 | return nil, fmt.Errorf("format: %w", err) |
| 30 | } |
| 31 | |
| 32 | newText := buf.String() |
| 33 | if newText == text { |
| 34 | return nil, nil |
| 35 | } |
| 36 | |
| 37 | endLine, endChar := getEndLineAndChar(text) |
| 38 | return []protocol.TextEdit{{ |
| 39 | NewText: newText, |
| 40 | Range: protocol.Range{ |
| 41 | Start: protocol.Position{ |
| 42 | Line: 0, |
| 43 | Character: 0, |
| 44 | }, |
| 45 | End: protocol.Position{ |
| 46 | Line: uint32(endLine), |
| 47 | Character: uint32(endChar), |
| 48 | }, |
| 49 | }, |
| 50 | }}, nil |
| 51 | } |
| 52 | |
| 53 | func getEndLineAndChar(txt string) (int, int) { |
| 54 | endLine := 0 |
| 55 | lastNewline := -1 |
| 56 | for i, ch := range txt { |
| 57 | if ch == '\n' { |
| 58 | endLine++ |
| 59 | lastNewline = i |
| 60 | } |
| 61 | } |
| 62 | endChar := 0 |
| 63 | if lastNewline >= 0 { |
| 64 | if lastNewline == len(txt)-1 { |
| 65 | endLine++ |
| 66 | endChar = 0 |
| 67 | } else { |
| 68 | endChar = len(txt) - lastNewline - 1 |
| 69 | } |
| 70 | } else { |
| 71 | endChar = len(txt) |
| 72 | } |
| 73 | return endLine, endChar |
| 74 | } |