Official Go implementation of the Ethereum protocol
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go-ethereum/vendor/github.com/olekukonko/tablewriter/table.go

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// Copyright 2014 Oleku Konko All rights reserved.
// Use of this source code is governed by a MIT
// license that can be found in the LICENSE file.
// This module is a Table Writer API for the Go Programming Language.
// The protocols were written in pure Go and works on windows and unix systems
// Create & Generate text based table
package tablewriter
import (
"bytes"
"fmt"
"io"
"regexp"
"strings"
)
const (
MAX_ROW_WIDTH = 30
)
const (
CENTER = "+"
ROW = "-"
COLUMN = "|"
SPACE = " "
NEWLINE = "\n"
)
const (
ALIGN_DEFAULT = iota
ALIGN_CENTER
ALIGN_RIGHT
ALIGN_LEFT
)
var (
decimal = regexp.MustCompile(`^-*\d*\.?\d*$`)
percent = regexp.MustCompile(`^-*\d*\.?\d*$%$`)
)
type Border struct {
Left bool
Right bool
Top bool
Bottom bool
}
type Table struct {
out io.Writer
rows [][]string
lines [][][]string
cs map[int]int
rs map[int]int
headers []string
footers []string
autoFmt bool
autoWrap bool
mW int
pCenter string
pRow string
pColumn string
tColumn int
tRow int
hAlign int
fAlign int
align int
newLine string
rowLine bool
autoMergeCells bool
hdrLine bool
borders Border
colSize int
}
// Start New Table
// Take io.Writer Directly
func NewWriter(writer io.Writer) *Table {
t := &Table{
out: writer,
rows: [][]string{},
lines: [][][]string{},
cs: make(map[int]int),
rs: make(map[int]int),
headers: []string{},
footers: []string{},
autoFmt: true,
autoWrap: true,
mW: MAX_ROW_WIDTH,
pCenter: CENTER,
pRow: ROW,
pColumn: COLUMN,
tColumn: -1,
tRow: -1,
hAlign: ALIGN_DEFAULT,
fAlign: ALIGN_DEFAULT,
align: ALIGN_DEFAULT,
newLine: NEWLINE,
rowLine: false,
hdrLine: true,
borders: Border{Left: true, Right: true, Bottom: true, Top: true},
colSize: -1}
return t
}
// Render table output
func (t Table) Render() {
if t.borders.Top {
t.printLine(true)
}
t.printHeading()
if t.autoMergeCells {
t.printRowsMergeCells()
} else {
t.printRows()
}
if !t.rowLine && t.borders.Bottom {
t.printLine(true)
}
t.printFooter()
}
// Set table header
func (t *Table) SetHeader(keys []string) {
t.colSize = len(keys)
for i, v := range keys {
t.parseDimension(v, i, -1)
t.headers = append(t.headers, v)
}
}
// Set table Footer
func (t *Table) SetFooter(keys []string) {
//t.colSize = len(keys)
for i, v := range keys {
t.parseDimension(v, i, -1)
t.footers = append(t.footers, v)
}
}
// Turn header autoformatting on/off. Default is on (true).
func (t *Table) SetAutoFormatHeaders(auto bool) {
t.autoFmt = auto
}
// Turn automatic multiline text adjustment on/off. Default is on (true).
func (t *Table) SetAutoWrapText(auto bool) {
t.autoWrap = auto
}
// Set the Default column width
func (t *Table) SetColWidth(width int) {
t.mW = width
}
// Set the Column Separator
func (t *Table) SetColumnSeparator(sep string) {
t.pColumn = sep
}
// Set the Row Separator
func (t *Table) SetRowSeparator(sep string) {
t.pRow = sep
}
// Set the center Separator
func (t *Table) SetCenterSeparator(sep string) {
t.pCenter = sep
}
// Set Header Alignment
func (t *Table) SetHeaderAlignment(hAlign int) {
t.hAlign = hAlign
}
// Set Footer Alignment
func (t *Table) SetFooterAlignment(fAlign int) {
t.fAlign = fAlign
}
// Set Table Alignment
func (t *Table) SetAlignment(align int) {
t.align = align
}
// Set New Line
func (t *Table) SetNewLine(nl string) {
t.newLine = nl
}
// Set Header Line
// This would enable / disable a line after the header
func (t *Table) SetHeaderLine(line bool) {
t.hdrLine = line
}
// Set Row Line
// This would enable / disable a line on each row of the table
func (t *Table) SetRowLine(line bool) {
t.rowLine = line
}
// Set Auto Merge Cells
// This would enable / disable the merge of cells with identical values
func (t *Table) SetAutoMergeCells(auto bool) {
t.autoMergeCells = auto
}
// Set Table Border
// This would enable / disable line around the table
func (t *Table) SetBorder(border bool) {
t.SetBorders(Border{border, border, border, border})
}
func (t *Table) SetBorders(border Border) {
t.borders = border
}
// Append row to table
func (t *Table) Append(row []string) {
rowSize := len(t.headers)
if rowSize > t.colSize {
t.colSize = rowSize
}
n := len(t.lines)
line := [][]string{}
for i, v := range row {
// Detect string width
// Detect String height
// Break strings into words
out := t.parseDimension(v, i, n)
// Append broken words
line = append(line, out)
}
t.lines = append(t.lines, line)
}
// Allow Support for Bulk Append
// Eliminates repeated for loops
func (t *Table) AppendBulk(rows [][]string) {
for _, row := range rows {
t.Append(row)
}
}
// Print line based on row width
func (t Table) printLine(nl bool) {
fmt.Fprint(t.out, t.pCenter)
for i := 0; i < len(t.cs); i++ {
v := t.cs[i]
fmt.Fprintf(t.out, "%s%s%s%s",
t.pRow,
strings.Repeat(string(t.pRow), v),
t.pRow,
t.pCenter)
}
if nl {
fmt.Fprint(t.out, t.newLine)
}
}
// Print line based on row width with our without cell separator
func (t Table) printLineOptionalCellSeparators(nl bool, displayCellSeparator []bool) {
fmt.Fprint(t.out, t.pCenter)
for i := 0; i < len(t.cs); i++ {
v := t.cs[i]
if i > len(displayCellSeparator) || displayCellSeparator[i] {
// Display the cell separator
fmt.Fprintf(t.out, "%s%s%s%s",
t.pRow,
strings.Repeat(string(t.pRow), v),
t.pRow,
t.pCenter)
} else {
// Don't display the cell separator for this cell
fmt.Fprintf(t.out, "%s%s",
strings.Repeat(" ", v+2),
t.pCenter)
}
}
if nl {
fmt.Fprint(t.out, t.newLine)
}
}
// Return the PadRight function if align is left, PadLeft if align is right,
// and Pad by default
func pad(align int) func(string, string, int) string {
padFunc := Pad
switch align {
case ALIGN_LEFT:
padFunc = PadRight
case ALIGN_RIGHT:
padFunc = PadLeft
}
return padFunc
}
// Print heading information
func (t Table) printHeading() {
// Check if headers is available
if len(t.headers) < 1 {
return
}
// Check if border is set
// Replace with space if not set
fmt.Fprint(t.out, ConditionString(t.borders.Left, t.pColumn, SPACE))
// Identify last column
end := len(t.cs) - 1
// Get pad function
padFunc := pad(t.hAlign)
// Print Heading column
for i := 0; i <= end; i++ {
v := t.cs[i]
h := t.headers[i]
if t.autoFmt {
h = Title(h)
}
pad := ConditionString((i == end && !t.borders.Left), SPACE, t.pColumn)
fmt.Fprintf(t.out, " %s %s",
padFunc(h, SPACE, v),
pad)
}
// Next line
fmt.Fprint(t.out, t.newLine)
if t.hdrLine {
t.printLine(true)
}
}
// Print heading information
func (t Table) printFooter() {
// Check if headers is available
if len(t.footers) < 1 {
return
}
// Only print line if border is not set
if !t.borders.Bottom {
t.printLine(true)
}
// Check if border is set
// Replace with space if not set
fmt.Fprint(t.out, ConditionString(t.borders.Bottom, t.pColumn, SPACE))
// Identify last column
end := len(t.cs) - 1
// Get pad function
padFunc := pad(t.fAlign)
// Print Heading column
for i := 0; i <= end; i++ {
v := t.cs[i]
f := t.footers[i]
if t.autoFmt {
f = Title(f)
}
pad := ConditionString((i == end && !t.borders.Top), SPACE, t.pColumn)
if len(t.footers[i]) == 0 {
pad = SPACE
}
fmt.Fprintf(t.out, " %s %s",
padFunc(f, SPACE, v),
pad)
}
// Next line
fmt.Fprint(t.out, t.newLine)
//t.printLine(true)
hasPrinted := false
for i := 0; i <= end; i++ {
v := t.cs[i]
pad := t.pRow
center := t.pCenter
length := len(t.footers[i])
if length > 0 {
hasPrinted = true
}
// Set center to be space if length is 0
if length == 0 && !t.borders.Right {
center = SPACE
}
// Print first junction
if i == 0 {
fmt.Fprint(t.out, center)
}
// Pad With space of length is 0
if length == 0 {
pad = SPACE
}
// Ignore left space of it has printed before
if hasPrinted || t.borders.Left {
pad = t.pRow
center = t.pCenter
}
// Change Center start position
if center == SPACE {
if i < end && len(t.footers[i+1]) != 0 {
center = t.pCenter
}
}
// Print the footer
fmt.Fprintf(t.out, "%s%s%s%s",
pad,
strings.Repeat(string(pad), v),
pad,
center)
}
fmt.Fprint(t.out, t.newLine)
}
func (t Table) printRows() {
for i, lines := range t.lines {
t.printRow(lines, i)
}
}
// Print Row Information
// Adjust column alignment based on type
func (t Table) printRow(columns [][]string, colKey int) {
// Get Maximum Height
max := t.rs[colKey]
total := len(columns)
// TODO Fix uneven col size
// if total < t.colSize {
// for n := t.colSize - total; n < t.colSize ; n++ {
// columns = append(columns, []string{SPACE})
// t.cs[n] = t.mW
// }
//}
// Pad Each Height
// pads := []int{}
pads := []int{}
for i, line := range columns {
length := len(line)
pad := max - length
pads = append(pads, pad)
for n := 0; n < pad; n++ {
columns[i] = append(columns[i], " ")
}
}
//fmt.Println(max, "\n")
for x := 0; x < max; x++ {
for y := 0; y < total; y++ {
// Check if border is set
fmt.Fprint(t.out, ConditionString((!t.borders.Left && y == 0), SPACE, t.pColumn))
fmt.Fprintf(t.out, SPACE)
str := columns[y][x]
// This would print alignment
// Default alignment would use multiple configuration
switch t.align {
case ALIGN_CENTER: //
fmt.Fprintf(t.out, "%s", Pad(str, SPACE, t.cs[y]))
case ALIGN_RIGHT:
fmt.Fprintf(t.out, "%s", PadLeft(str, SPACE, t.cs[y]))
case ALIGN_LEFT:
fmt.Fprintf(t.out, "%s", PadRight(str, SPACE, t.cs[y]))
default:
if decimal.MatchString(strings.TrimSpace(str)) || percent.MatchString(strings.TrimSpace(str)) {
fmt.Fprintf(t.out, "%s", PadLeft(str, SPACE, t.cs[y]))
} else {
fmt.Fprintf(t.out, "%s", PadRight(str, SPACE, t.cs[y]))
// TODO Custom alignment per column
//if max == 1 || pads[y] > 0 {
// fmt.Fprintf(t.out, "%s", Pad(str, SPACE, t.cs[y]))
//} else {
// fmt.Fprintf(t.out, "%s", PadRight(str, SPACE, t.cs[y]))
//}
}
}
fmt.Fprintf(t.out, SPACE)
}
// Check if border is set
// Replace with space if not set
fmt.Fprint(t.out, ConditionString(t.borders.Left, t.pColumn, SPACE))
fmt.Fprint(t.out, t.newLine)
}
if t.rowLine {
t.printLine(true)
}
}
// Print the rows of the table and merge the cells that are identical
func (t Table) printRowsMergeCells() {
var previousLine []string
var displayCellBorder []bool
var tmpWriter bytes.Buffer
for i, lines := range t.lines {
// We store the display of the current line in a tmp writer, as we need to know which border needs to be print above
previousLine, displayCellBorder = t.printRowMergeCells(&tmpWriter, lines, i, previousLine)
if i > 0 { //We don't need to print borders above first line
if t.rowLine {
t.printLineOptionalCellSeparators(true, displayCellBorder)
}
}
tmpWriter.WriteTo(t.out)
}
//Print the end of the table
if t.rowLine {
t.printLine(true)
}
}
// Print Row Information to a writer and merge identical cells.
// Adjust column alignment based on type
func (t Table) printRowMergeCells(writer io.Writer, columns [][]string, colKey int, previousLine []string) ([]string, []bool) {
// Get Maximum Height
max := t.rs[colKey]
total := len(columns)
// Pad Each Height
pads := []int{}
for i, line := range columns {
length := len(line)
pad := max - length
pads = append(pads, pad)
for n := 0; n < pad; n++ {
columns[i] = append(columns[i], " ")
}
}
var displayCellBorder []bool
for x := 0; x < max; x++ {
for y := 0; y < total; y++ {
// Check if border is set
fmt.Fprint(writer, ConditionString((!t.borders.Left && y == 0), SPACE, t.pColumn))
fmt.Fprintf(writer, SPACE)
str := columns[y][x]
if t.autoMergeCells {
//Store the full line to merge mutli-lines cells
fullLine := strings.Join(columns[y], " ")
if len(previousLine) > y && fullLine == previousLine[y] && fullLine != "" {
// If this cell is identical to the one above but not empty, we don't display the border and keep the cell empty.
displayCellBorder = append(displayCellBorder, false)
str = ""
} else {
// First line or different content, keep the content and print the cell border
displayCellBorder = append(displayCellBorder, true)
}
}
// This would print alignment
// Default alignment would use multiple configuration
switch t.align {
case ALIGN_CENTER: //
fmt.Fprintf(writer, "%s", Pad(str, SPACE, t.cs[y]))
case ALIGN_RIGHT:
fmt.Fprintf(writer, "%s", PadLeft(str, SPACE, t.cs[y]))
case ALIGN_LEFT:
fmt.Fprintf(writer, "%s", PadRight(str, SPACE, t.cs[y]))
default:
if decimal.MatchString(strings.TrimSpace(str)) || percent.MatchString(strings.TrimSpace(str)) {
fmt.Fprintf(writer, "%s", PadLeft(str, SPACE, t.cs[y]))
} else {
fmt.Fprintf(writer, "%s", PadRight(str, SPACE, t.cs[y]))
}
}
fmt.Fprintf(writer, SPACE)
}
// Check if border is set
// Replace with space if not set
fmt.Fprint(writer, ConditionString(t.borders.Left, t.pColumn, SPACE))
fmt.Fprint(writer, t.newLine)
}
//The new previous line is the current one
previousLine = make([]string, total)
for y := 0; y < total; y++ {
previousLine[y] = strings.Join(columns[y], " ") //Store the full line for multi-lines cells
}
//Returns the newly added line and wether or not a border should be displayed above.
return previousLine, displayCellBorder
}
func (t *Table) parseDimension(str string, colKey, rowKey int) []string {
var (
raw []string
max int
)
w := DisplayWidth(str)
// Calculate Width
// Check if with is grater than maximum width
if w > t.mW {
w = t.mW
}
// Check if width exists
v, ok := t.cs[colKey]
if !ok || v < w || v == 0 {
t.cs[colKey] = w
}
if rowKey == -1 {
return raw
}
// Calculate Height
if t.autoWrap {
raw, _ = WrapString(str, t.cs[colKey])
} else {
raw = getLines(str)
}
for _, line := range raw {
if w := DisplayWidth(line); w > max {
max = w
}
}
// Make sure the with is the same length as maximum word
// Important for cases where the width is smaller than maxu word
if max > t.cs[colKey] {
t.cs[colKey] = max
}
h := len(raw)
v, ok = t.rs[rowKey]
if !ok || v < h || v == 0 {
t.rs[rowKey] = h
}
//fmt.Printf("Raw %+v %d\n", raw, len(raw))
return raw
}