mirror of https://gitea.com/gitea/act
144 lines
3.0 KiB
Go
144 lines
3.0 KiB
Go
package common
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import (
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"fmt"
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"io"
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"os"
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"strings"
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)
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// Style is a specific style
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type Style int
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// Styles
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const (
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StyleDoubleLine = iota
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StyleSingleLine
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StyleDashedLine
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StyleNoLine
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)
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// NewPen creates a new pen
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func NewPen(style Style, color int) *Pen {
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bgcolor := 49
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if os.Getenv("CLICOLOR") == "0" {
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color = 0
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bgcolor = 0
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}
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return &Pen{
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style: style,
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color: color,
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bgcolor: bgcolor,
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}
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}
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type styleDef struct {
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cornerTL string
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cornerTR string
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cornerBL string
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cornerBR string
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lineH string
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lineV string
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}
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var styleDefs = []styleDef{
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{"\u2554", "\u2557", "\u255a", "\u255d", "\u2550", "\u2551"},
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{"\u256d", "\u256e", "\u2570", "\u256f", "\u2500", "\u2502"},
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{"\u250c", "\u2510", "\u2514", "\u2518", "\u254c", "\u254e"},
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{" ", " ", " ", " ", " ", " "},
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}
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// Pen struct
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type Pen struct {
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style Style
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color int
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bgcolor int
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}
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// Drawing struct
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type Drawing struct {
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buf *strings.Builder
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width int
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}
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func (p *Pen) drawTopBars(buf io.Writer, labels ...string) {
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style := styleDefs[p.style]
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for _, label := range labels {
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bar := strings.Repeat(style.lineH, len(label)+2)
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fmt.Fprintf(buf, " ")
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fmt.Fprintf(buf, "\x1b[%d;%dm", p.color, p.bgcolor)
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fmt.Fprintf(buf, "%s%s%s", style.cornerTL, bar, style.cornerTR)
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fmt.Fprintf(buf, "\x1b[%dm", 0)
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}
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fmt.Fprintf(buf, "\n")
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}
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func (p *Pen) drawBottomBars(buf io.Writer, labels ...string) {
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style := styleDefs[p.style]
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for _, label := range labels {
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bar := strings.Repeat(style.lineH, len(label)+2)
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fmt.Fprintf(buf, " ")
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fmt.Fprintf(buf, "\x1b[%d;%dm", p.color, p.bgcolor)
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fmt.Fprintf(buf, "%s%s%s", style.cornerBL, bar, style.cornerBR)
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fmt.Fprintf(buf, "\x1b[%dm", 0)
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}
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fmt.Fprintf(buf, "\n")
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}
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func (p *Pen) drawLabels(buf io.Writer, labels ...string) {
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style := styleDefs[p.style]
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for _, label := range labels {
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fmt.Fprintf(buf, " ")
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fmt.Fprintf(buf, "\x1b[%d;%dm", p.color, p.bgcolor)
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fmt.Fprintf(buf, "%s %s %s", style.lineV, label, style.lineV)
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fmt.Fprintf(buf, "\x1b[%dm", 0)
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}
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fmt.Fprintf(buf, "\n")
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}
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// DrawArrow between boxes
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func (p *Pen) DrawArrow() *Drawing {
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drawing := &Drawing{
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buf: new(strings.Builder),
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width: 1,
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}
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fmt.Fprintf(drawing.buf, "\x1b[%dm", p.color)
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fmt.Fprintf(drawing.buf, "\u2b07")
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fmt.Fprintf(drawing.buf, "\x1b[%dm", 0)
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return drawing
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}
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// DrawBoxes to draw boxes
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func (p *Pen) DrawBoxes(labels ...string) *Drawing {
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width := 0
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for _, l := range labels {
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width += len(l) + 2 + 2 + 1
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}
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drawing := &Drawing{
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buf: new(strings.Builder),
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width: width,
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}
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p.drawTopBars(drawing.buf, labels...)
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p.drawLabels(drawing.buf, labels...)
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p.drawBottomBars(drawing.buf, labels...)
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return drawing
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}
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// Draw to writer
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func (d *Drawing) Draw(writer io.Writer, centerOnWidth int) {
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padSize := (centerOnWidth - d.GetWidth()) / 2
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if padSize < 0 {
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padSize = 0
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}
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for _, l := range strings.Split(d.buf.String(), "\n") {
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if len(l) > 0 {
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padding := strings.Repeat(" ", padSize)
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fmt.Fprintf(writer, "%s%s\n", padding, l)
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}
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}
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}
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// GetWidth of drawing
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func (d *Drawing) GetWidth() int {
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return d.width
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}
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