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