clerk/journal/printer/printer.go (view raw)
| 1 | package printer |
| 2 | |
| 3 | import ( |
| 4 | "fmt" |
| 5 | "io" |
| 6 | "strings" |
| 7 | |
| 8 | "olexsmir.xyz/clerk/journal/ast" |
| 9 | ) |
| 10 | |
| 11 | // AlignStyle controls how postings are aligned |
| 12 | type AlignStyle int |
| 13 | |
| 14 | const ( |
| 15 | AlignTwoSpaces AlignStyle = iota // " Account $10.00" |
| 16 | AlignRight // amounts at fixed col: " Account $10.00" |
| 17 | AlignTab // elastic tabstops |
| 18 | ) |
| 19 | |
| 20 | func (a AlignStyle) String() string { |
| 21 | switch a { |
| 22 | case AlignTwoSpaces: |
| 23 | return "two-spaces" |
| 24 | case AlignRight: |
| 25 | return "right" |
| 26 | case AlignTab: |
| 27 | return "tab" |
| 28 | default: |
| 29 | panic("invalid align style value") |
| 30 | } |
| 31 | } |
| 32 | |
| 33 | // CommodityPos controls where the commodity marker is placed |
| 34 | type CommodityPos int |
| 35 | |
| 36 | const ( |
| 37 | CommodityAfter CommodityPos = iota // "10.00 EUR" |
| 38 | CommodityBefore // "$10.00" |
| 39 | ) |
| 40 | |
| 41 | func (c CommodityPos) String() string { |
| 42 | switch c { |
| 43 | case CommodityAfter: |
| 44 | return "after" |
| 45 | case CommodityBefore: |
| 46 | return "before" |
| 47 | default: |
| 48 | panic("invalid commodity pos value") |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | type Config struct { |
| 53 | TabIndent bool // true = tabs, false = spaces |
| 54 | IndentWidth int // spaces per indent level (default: 2) |
| 55 | PreserveBlankLines bool // preserve consecutive blank lines as-is |
| 56 | AlignStyle AlignStyle // (default AlignTwoSpaces) |
| 57 | AlignColumn int // fixed column for AlignRight |
| 58 | CommodityPos CommodityPos // where to place commodity |
| 59 | } |
| 60 | |
| 61 | var DefaultConfig = Config{ |
| 62 | TabIndent: false, |
| 63 | IndentWidth: 2, |
| 64 | PreserveBlankLines: false, |
| 65 | AlignStyle: AlignTwoSpaces, |
| 66 | AlignColumn: 70, |
| 67 | CommodityPos: CommodityAfter, |
| 68 | } |
| 69 | |
| 70 | func (c *Config) indent() string { |
| 71 | if c.TabIndent { |
| 72 | return "\t" |
| 73 | } |
| 74 | n := 2 |
| 75 | if c.IndentWidth > 0 { |
| 76 | n = c.IndentWidth |
| 77 | } |
| 78 | return spaces(n) |
| 79 | } |
| 80 | |
| 81 | // printer holds formatting state for a single Fprint call. |
| 82 | type printer struct { |
| 83 | buf strings.Builder |
| 84 | cfg *Config |
| 85 | indent string |
| 86 | prevWasBlank bool |
| 87 | } |
| 88 | |
| 89 | // Fprint formats a parsed journal. |
| 90 | func (c *Config) Fprint(w io.Writer, j *ast.Journal) error { |
| 91 | p := printer{cfg: c, indent: c.indent()} |
| 92 | |
| 93 | for _, e := range j.Entries { |
| 94 | p.formatEntry(e) |
| 95 | } |
| 96 | |
| 97 | // allow exactly one trailing newline |
| 98 | out := strings.TrimRight(p.buf.String(), "\n") + "\n" |
| 99 | _, err := io.WriteString(w, out) |
| 100 | return err |
| 101 | } |
| 102 | |
| 103 | // FprintEntry formats a single journal entry. |
| 104 | func (c *Config) FprintEntry(w io.Writer, e ast.Entry) error { |
| 105 | p := printer{cfg: c, indent: c.indent()} |
| 106 | p.formatEntry(e) |
| 107 | _, err := io.WriteString(w, p.buf.String()) |
| 108 | return err |
| 109 | } |
| 110 | |
| 111 | func (p *printer) formatEntry(e ast.Entry) { |
| 112 | switch e := e.(type) { |
| 113 | case *ast.BlankLine: |
| 114 | if !p.prevWasBlank || p.cfg.PreserveBlankLines { |
| 115 | p.buf.WriteByte('\n') |
| 116 | } |
| 117 | p.prevWasBlank = true |
| 118 | return |
| 119 | case *ast.Transaction: |
| 120 | p.prevWasBlank = false |
| 121 | p.writeTransaction(e) |
| 122 | return |
| 123 | case *ast.PeriodicTransaction: |
| 124 | p.prevWasBlank = false |
| 125 | p.writePeriodicTransaction(e) |
| 126 | return |
| 127 | case *ast.AutomatedTransaction: |
| 128 | p.prevWasBlank = false |
| 129 | p.writeAutomatedTransaction(e) |
| 130 | return |
| 131 | |
| 132 | case *ast.IgnoredDirective: |
| 133 | p.writeIgnoredDirective(e) |
| 134 | return |
| 135 | |
| 136 | case *ast.Comment: |
| 137 | p.writeComment(e) |
| 138 | case *ast.AccountDirective: |
| 139 | p.writeAccountDirective(e) |
| 140 | case *ast.CommodityDirective: |
| 141 | p.writeCommodityDirective(e) |
| 142 | case *ast.IncludeDirective: |
| 143 | p.writeIncludeDirective(e) |
| 144 | case *ast.AliasDirective: |
| 145 | p.writeAliasDirective(e) |
| 146 | case *ast.PayeeDirective: |
| 147 | p.writePayeeDirective(e) |
| 148 | case *ast.TagDirective: |
| 149 | p.writeTagDirective(e) |
| 150 | case *ast.YearDirective: |
| 151 | p.writeYearDirective(e) |
| 152 | case *ast.DecimalMarkDirective: |
| 153 | p.writeDecimalMarkDirective(e) |
| 154 | case *ast.MarketPriceDirective: |
| 155 | p.writeMarketPriceDirective(e) |
| 156 | case *ast.ConversionDirective: |
| 157 | p.writeConversionDirective(e) |
| 158 | case *ast.DefaultCommodityDirective: |
| 159 | p.writeDefaultCommodityDirective(e) |
| 160 | case *ast.ApplyDirective: |
| 161 | p.writeApplyDirective(e) |
| 162 | case *ast.EndDirective: |
| 163 | p.writeEndDirective(e) |
| 164 | case *ast.CommentBlockDirective: |
| 165 | p.writeCommentBlockDirective(e) |
| 166 | default: |
| 167 | fmt.Fprintf(&p.buf, "; unknown entry %T", e) |
| 168 | } |
| 169 | p.prevWasBlank = false |
| 170 | p.buf.WriteByte('\n') |
| 171 | } |
| 172 | |
| 173 | func (p *printer) writeSpaces(n int) { |
| 174 | for range n { |
| 175 | p.buf.WriteByte(' ') |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | func isCommentChar(b byte) bool { |
| 180 | return b == ';' || b == '#' || b == '%' || b == '*' |
| 181 | } |
| 182 | |
| 183 | func (p *printer) writeComment(c *ast.Comment) { |
| 184 | if c != nil && c.Text != "" { |
| 185 | p.buf.WriteByte(c.Marker) |
| 186 | if !isCommentChar(c.Text[0]) { |
| 187 | p.buf.WriteByte(' ') |
| 188 | } |
| 189 | p.buf.WriteString(c.Text) |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | func (p *printer) writeInlineComment(c *ast.Comment) { |
| 194 | if c != nil && c.Text != "" { |
| 195 | p.buf.WriteByte(' ') |
| 196 | p.buf.WriteByte(' ') |
| 197 | p.buf.WriteByte(c.Marker) |
| 198 | if !isCommentChar(c.Text[0]) { |
| 199 | p.buf.WriteByte(' ') |
| 200 | } |
| 201 | p.buf.WriteString(c.Text) |
| 202 | } |
| 203 | } |
| 204 | |
| 205 | func spaces(n int) string { |
| 206 | b := make([]byte, n) |
| 207 | for i := range b { |
| 208 | b[i] = ' ' |
| 209 | } |
| 210 | return string(b) |
| 211 | } |