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