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package termui
import (
"image"
"strings"
"unicode/utf8"
. "github.com/gizak/termui/v3"
rw "github.com/mattn/go-runewidth"
"github.com/xxxserxxx/gotop/v4/utils"
)
const (
ELLIPSIS = "…"
CURSOR = " "
)
type Entry struct {
Block
Style Style
Label string
Value string
ShowWhenEmpty bool
UpdateCallback func(string)
editing bool
}
func (self *Entry) SetEditing(editing bool) {
self.editing = editing
}
func (self *Entry) update() {
if self.UpdateCallback != nil {
self.UpdateCallback(self.Value)
}
}
// HandleEvent handles input events if the entry is being edited.
// Returns true if the event was handled.
func (self *Entry) HandleEvent(e Event) bool {
if !self.editing {
return false
}
if utf8.RuneCountInString(e.ID) == 1 {
self.Value += e.ID
self.update()
return true
}
switch e.ID {
case "<C-c>", "<Escape>":
self.Value = ""
self.editing = false
self.update()
case "<Enter>":
self.editing = false
case "<Backspace>":
if self.Value != "" {
r := []rune(self.Value)
self.Value = string(r[:len(r)-1])
self.update()
}
case "<Space>":
self.Value += " "
self.update()
default:
return false
}
return true
}
func (self *Entry) Draw(buf *Buffer) {
if self.Value == "" && !self.editing && !self.ShowWhenEmpty {
return
}
style := self.Style
label := self.Label
if self.editing {
label += "["
style = NewStyle(style.Fg, style.Bg, ModifierBold)
}
cursorStyle := NewStyle(style.Bg, style.Fg, ModifierClear)
p := image.Pt(self.Min.X, self.Min.Y)
buf.SetString(label, style, p)
p.X += rw.StringWidth(label)
tail := " "
if self.editing {
tail = "] "
}
maxLen := self.Max.X - p.X - rw.StringWidth(tail)
if self.editing {
maxLen -= 1 // for cursor
}
value := utils.TruncateFront(self.Value, maxLen, ELLIPSIS)
buf.SetString(value, self.Style, p)
p.X += rw.StringWidth(value)
if self.editing {
buf.SetString(CURSOR, cursorStyle, p)
p.X += rw.StringWidth(CURSOR)
if remaining := maxLen - rw.StringWidth(value); remaining > 0 {
buf.SetString(strings.Repeat(" ", remaining), self.TitleStyle, p)
p.X += remaining
}
}
buf.SetString(tail, style, p)
}
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