mirror of https://github.com/gizak/termui.git
90 lines
2.0 KiB
Go
90 lines
2.0 KiB
Go
// Copyright 2016 Zack Guo <zack.y.guo@gmail.com>. All rights reserved.
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// Use of this source code is governed by a MIT license that can
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// be found in the LICENSE file.
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package termui
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import "strings"
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// List displays []string as its items,
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// it has a Overflow option (default is "hidden"), when set to "hidden",
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// the item exceeding List's width is truncated, but when set to "wrap",
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// the overflowed text breaks into next line.
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/*
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strs := []string{
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"[0] github.com/gizak/termui",
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"[1] editbox.go",
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"[2] iterrupt.go",
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"[3] keyboard.go",
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"[4] output.go",
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"[5] random_out.go",
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"[6] dashboard.go",
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"[7] nsf/termbox-go"}
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ls := termui.NewList()
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ls.Items = strs
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ls.ItemFgColor = termui.ColorYellow
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ls.BorderLabel = "List"
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ls.Height = 7
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ls.Width = 25
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ls.Y = 0
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*/
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type List struct {
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Block
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Items []string
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Overflow string
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ItemFgColor Attribute
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ItemBgColor Attribute
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}
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// NewList returns a new *List with current theme.
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func NewList() *List {
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l := &List{Block: *NewBlock()}
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l.Overflow = "hidden"
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l.ItemFgColor = ThemeAttr("list.item.fg")
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l.ItemBgColor = ThemeAttr("list.item.bg")
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return l
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}
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// Buffer implements Bufferer interface.
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func (l *List) Buffer() Buffer {
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buf := l.Block.Buffer()
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switch l.Overflow {
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case "wrap":
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cs := DefaultTxBuilder.Build(strings.Join(l.Items, "\n"), l.ItemFgColor, l.ItemBgColor)
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i, j, k := 0, 0, 0
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for i < l.innerArea.Dy() && k < len(cs) {
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w := cs[k].Width()
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if cs[k].Ch == '\n' || j+w > l.innerArea.Dx() {
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i++
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j = 0
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if cs[k].Ch == '\n' {
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k++
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}
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continue
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}
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buf.Set(l.innerArea.Min.X+j, l.innerArea.Min.Y+i, cs[k])
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k++
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j++
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}
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case "hidden":
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trimItems := l.Items
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if len(trimItems) > l.innerArea.Dy() {
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trimItems = trimItems[:l.innerArea.Dy()]
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}
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for i, v := range trimItems {
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cs := DTrimTxCls(DefaultTxBuilder.Build(v, l.ItemFgColor, l.ItemBgColor), l.innerArea.Dx())
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j := 0
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for _, vv := range cs {
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w := vv.Width()
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buf.Set(l.innerArea.Min.X+j, l.innerArea.Min.Y+i, vv)
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j += w
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}
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}
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}
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return buf
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}
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