131 lines
3 KiB
Go
131 lines
3 KiB
Go
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package org
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import (
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"regexp"
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"strconv"
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"strings"
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"unicode/utf8"
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)
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type Table struct {
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Rows []Row
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ColumnInfos []ColumnInfo
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}
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type Row struct {
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Columns []Column
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IsSpecial bool
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}
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type Column struct {
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Children []Node
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*ColumnInfo
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}
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type ColumnInfo struct {
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Align string
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Len int
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}
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var tableSeparatorRegexp = regexp.MustCompile(`^(\s*)(\|[+-|]*)\s*$`)
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var tableRowRegexp = regexp.MustCompile(`^(\s*)(\|.*)`)
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var columnAlignRegexp = regexp.MustCompile(`^<(l|c|r)>$`)
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func lexTable(line string) (token, bool) {
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if m := tableSeparatorRegexp.FindStringSubmatch(line); m != nil {
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return token{"tableSeparator", len(m[1]), m[2], m}, true
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} else if m := tableRowRegexp.FindStringSubmatch(line); m != nil {
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return token{"tableRow", len(m[1]), m[2], m}, true
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}
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return nilToken, false
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}
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func (d *Document) parseTable(i int, parentStop stopFn) (int, Node) {
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rawRows, start := [][]string{}, i
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for ; !parentStop(d, i); i++ {
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if t := d.tokens[i]; t.kind == "tableRow" {
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rawRow := strings.FieldsFunc(d.tokens[i].content, func(r rune) bool { return r == '|' })
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for i := range rawRow {
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rawRow[i] = strings.TrimSpace(rawRow[i])
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}
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rawRows = append(rawRows, rawRow)
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} else if t.kind == "tableSeparator" {
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rawRows = append(rawRows, nil)
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} else {
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break
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}
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}
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table := Table{nil, getColumnInfos(rawRows)}
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for _, rawColumns := range rawRows {
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row := Row{nil, isSpecialRow(rawColumns)}
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if len(rawColumns) != 0 {
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for i := range table.ColumnInfos {
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column := Column{nil, &table.ColumnInfos[i]}
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if i < len(rawColumns) {
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column.Children = d.parseInline(rawColumns[i])
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}
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row.Columns = append(row.Columns, column)
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}
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}
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table.Rows = append(table.Rows, row)
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}
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return i - start, table
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}
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func getColumnInfos(rows [][]string) []ColumnInfo {
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columnCount := 0
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for _, columns := range rows {
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if n := len(columns); n > columnCount {
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columnCount = n
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}
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}
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columnInfos := make([]ColumnInfo, columnCount)
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for i := 0; i < columnCount; i++ {
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countNumeric, countNonNumeric := 0, 0
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for _, columns := range rows {
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if i >= len(columns) {
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continue
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}
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if n := utf8.RuneCountInString(columns[i]); n > columnInfos[i].Len {
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columnInfos[i].Len = n
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}
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if m := columnAlignRegexp.FindStringSubmatch(columns[i]); m != nil && isSpecialRow(columns) {
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switch m[1] {
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case "l":
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columnInfos[i].Align = "left"
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case "c":
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columnInfos[i].Align = "center"
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case "r":
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columnInfos[i].Align = "right"
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}
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} else if _, err := strconv.ParseFloat(columns[i], 32); err == nil {
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countNumeric++
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} else if strings.TrimSpace(columns[i]) != "" {
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countNonNumeric++
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}
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}
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if columnInfos[i].Align == "" && countNumeric >= countNonNumeric {
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columnInfos[i].Align = "right"
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}
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}
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return columnInfos
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}
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func isSpecialRow(rawColumns []string) bool {
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isAlignRow := true
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for _, rawColumn := range rawColumns {
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if !columnAlignRegexp.MatchString(rawColumn) && rawColumn != "" {
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isAlignRow = false
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}
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}
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return isAlignRow
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}
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func (n Table) String() string { return orgWriter.nodesAsString(n) }
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