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// Copyright 2015 Zack Guo <gizak@icloud.com>. All rights reserved.
// Use of this source code is governed by a MIT license that can
// be found in the LICENSE file.
package termui
import "strings"
// List displays []string as its items,
// it has a Overflow option (default is "hidden"), when set to "hidden",
// the item exceeding List's width is truncated, but when set to "wrap",
// the overflowed text breaks into next line.
/*
strs := []string{
"[0] github.com/gizak/termui",
"[1] editbox.go",
"[2] iterrupt.go",
"[3] keyboard.go",
"[4] output.go",
"[5] random_out.go",
"[6] dashboard.go",
"[7] nsf/termbox-go"}
ls := termui.NewList()
ls.Items = strs
ls.ItemFgColor = termui.ColorYellow
ls.Border.Label = "List"
ls.Height = 7
ls.Width = 25
ls.Y = 0
*/
type List struct {
Block
Items []string
Overflow string
ItemFgColor Attribute
ItemBgColor Attribute
}
// NewList returns a new *List with current theme.
func NewList() *List {
l := &List{Block: *NewBlock()}
l.Overflow = "hidden"
l.ItemFgColor = theme.ListItemFg
l.ItemBgColor = theme.ListItemBg
return l
}
// Buffer implements Bufferer interface.
func (l *List) Buffer() []Point {
ps := l.Block.Buffer()
switch l.Overflow {
case "wrap":
rs := str2runes(strings.Join(l.Items, "\n"))
i, j, k := 0, 0, 0
for i < l.innerHeight && k < len(rs) {
w := charWidth(rs[k])
if rs[k] == '\n' || j+w > l.innerWidth {
i++
j = 0
if rs[k] == '\n' {
k++
}
continue
}
pi := Point{}
pi.X = l.innerX + j
pi.Y = l.innerY + i
pi.Ch = rs[k]
pi.Bg = l.ItemBgColor
pi.Fg = l.ItemFgColor
ps = append(ps, pi)
k++
j++
}
case "hidden":
trimItems := l.Items
if len(trimItems) > l.innerHeight {
trimItems = trimItems[:l.innerHeight]
}
for i, v := range trimItems {
rs := trimStr2Runes(v, l.innerWidth)
j := 0
for _, vv := range rs {
w := charWidth(vv)
p := Point{}
p.X = l.innerX + j
p.Y = l.innerY + i
p.Ch = vv
p.Bg = l.ItemBgColor
p.Fg = l.ItemFgColor
ps = append(ps, p)
j += w
}
}
}
return l.Block.chopOverflow(ps)
}
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