mirror of https://github.com/gizak/termui.git
74 lines
1.6 KiB
Go
74 lines
1.6 KiB
Go
// Copyright 2017 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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// Paragraph displays a paragraph.
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/*
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par := termui.NewParagraph("Simple Text")
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par.Height = 3
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par.Width = 17
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par.BorderLabel = "Label"
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*/
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type Paragraph struct {
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Block
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Text string
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TextFgColor Attribute
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TextBgColor Attribute
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WrapLength int // words wrap limit. Note it may not work properly with multi-width char
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}
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// NewParagraph returns a new *Paragraph with given text as its content.
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func NewParagraph(s string) *Paragraph {
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return &Paragraph{
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Block: *NewBlock(),
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Text: s,
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TextFgColor: ThemeAttr("par.text.fg"),
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TextBgColor: ThemeAttr("par.text.bg"),
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WrapLength: 0,
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}
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}
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// Buffer implements Bufferer interface.
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func (p *Paragraph) Buffer() Buffer {
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buf := p.Block.Buffer()
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fg, bg := p.TextFgColor, p.TextBgColor
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cs := DefaultTxBuilder.Build(p.Text, fg, bg)
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// wrap if WrapLength set
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if p.WrapLength < 0 {
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cs = wrapTx(cs, p.Width-2)
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} else if p.WrapLength > 0 {
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cs = wrapTx(cs, p.WrapLength)
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}
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y, x, n := 0, 0, 0
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for y < p.innerArea.Dy() && n < len(cs) {
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w := cs[n].Width()
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if cs[n].Ch == '\n' || x+w > p.innerArea.Dx() {
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y++
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x = 0 // set x = 0
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if cs[n].Ch == '\n' {
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n++
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}
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if y >= p.innerArea.Dy() {
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buf.Set(p.innerArea.Min.X+p.innerArea.Dx()-1,
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p.innerArea.Min.Y+p.innerArea.Dy()-1,
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Cell{Ch: '…', Fg: p.TextFgColor, Bg: p.TextBgColor})
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break
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}
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continue
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}
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buf.Set(p.innerArea.Min.X+x, p.innerArea.Min.Y+y, cs[n])
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n++
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x += w
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}
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return buf
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}
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