termui/widget/par.go
gizak 7aed750f64 WIP use Buffer instead of []Point in Bufferer
Merge https://github.com/Matt3o12/termui.git colored-list
Merge https://github.com/funkygao/termui.git master
Add subdir widget
Use image Rectangle represent buffer area
2015-04-21 09:56:10 -04:00

72 lines
1.5 KiB
Go

// +build ignore
// 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
// Par displays a paragraph.
/*
par := termui.NewPar("Simple Text")
par.Height = 3
par.Width = 17
par.Border.Label = "Label"
*/
type Par struct {
Block
Text string
TextFgColor Attribute
TextBgColor Attribute
RendererFactory TextRendererFactory
}
// NewPar returns a new *Par with given text as its content.
func NewPar(s string) *Par {
return &Par{
Block: *NewBlock(),
Text: s,
TextFgColor: theme.ParTextFg,
TextBgColor: theme.ParTextBg,
RendererFactory: PlainRendererFactory{},
}
}
// Buffer implements Bufferer interface.
func (p *Par) Buffer() []Point {
ps := p.Block.Buffer()
fg, bg := p.TextFgColor, p.TextBgColor
sequence := p.RendererFactory.TextRenderer(p.Text).Render(fg, bg)
runes := []rune(sequence.NormalizedText)
y, x, n := 0, 0, 0
for y < p.innerHeight && n < len(runes) {
point, width := sequence.PointAt(n, x+p.innerX, y+p.innerY)
if runes[n] == '\n' || x+width > p.innerWidth {
y++
x = 0 // set x = 0
if runes[n] == '\n' {
n++
}
if y >= p.innerHeight {
ps = append(ps, newPointWithAttrs('…',
p.innerX+p.innerWidth-1,
p.innerY+p.innerHeight-1,
p.TextFgColor, p.TextBgColor))
break
}
continue
}
ps = append(ps, point)
n++
x += width
}
return p.Block.chopOverflow(ps)
}