91 lines
2.1 KiB
Go
91 lines
2.1 KiB
Go
// Copyright 2015 Zack Guo <gizak@icloud.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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// 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.Border.Label = "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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RendererFactory TextRendererFactory
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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 = theme.ListItemFg
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l.ItemBgColor = theme.ListItemBg
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l.RendererFactory = NoopRendererFactory{}
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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() []Point {
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ps := l.Block.Buffer()
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switch l.Overflow {
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case "wrap":
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y := 0
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for _, item := range l.Items {
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x := 0
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renderer := l.RendererFactory.TextRenderer(item)
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sequence := renderer.Render(l.ItemFgColor, l.ItemBgColor)
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for n := range []rune(sequence.NormalizedText) {
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point, width := sequence.PointAt(n, x+l.innerX, y+l.innerY)
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if width+x <= l.innerWidth {
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ps = append(ps, point)
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x += width
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} else {
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y++
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x = 0
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}
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}
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y++
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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.innerHeight {
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trimItems = trimItems[:l.innerHeight]
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}
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for y, item := range trimItems {
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text := TrimStrIfAppropriate(item, l.innerWidth)
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render := l.RendererFactory.TextRenderer(text)
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sequence := render.RenderSequence(0, -1, l.ItemFgColor, l.ItemBgColor)
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t, _ := sequence.Buffer(l.innerX, y+l.innerY)
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ps = append(ps, t...)
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}
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}
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return l.Block.chopOverflow(ps)
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}
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