termui/block.go

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package termui
// basic struct, consider it as css: display:block
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type Block struct {
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X int
Y int
Border labeledBorder
IsDisplay bool
HasBorder bool
BgColor Attribute
Width int
Height int
innerWidth int
innerHeight int
innerX int
innerY int
PaddingTop int
PaddingBottom int
PaddingLeft int
PaddingRight int
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}
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func NewBlock() *Block {
d := Block{}
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d.IsDisplay = true
d.HasBorder = theme.HasBorder
d.Border.BgColor = theme.BorderBg
d.Border.FgColor = theme.BorderFg
d.Border.LabelBgColor = theme.BorderLabelTextBg
d.Border.LabelFgColor = theme.BorderLabelTextFg
d.BgColor = theme.BlockBg
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d.Width = 2
d.Height = 2
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return &d
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}
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// compute box model
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func (d *Block) align() {
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d.innerWidth = d.Width - d.PaddingLeft - d.PaddingRight
d.innerHeight = d.Height - d.PaddingTop - d.PaddingBottom
d.innerX = d.X + d.PaddingLeft
d.innerY = d.Y + d.PaddingTop
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if d.HasBorder {
d.innerHeight -= 2
d.innerWidth -= 2
d.Border.X = d.X
d.Border.Y = d.Y
d.Border.Width = d.Width
d.Border.Height = d.Height
d.innerX += 1
d.innerY += 1
}
}
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func (d *Block) Buffer() []Point {
d.align()
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ps := []Point{}
if !d.IsDisplay {
return ps
}
if d.HasBorder {
ps = d.Border.Buffer()
}
for i := 0; i < d.innerWidth; i++ {
for j := 0; j < d.innerHeight; j++ {
p := Point{}
p.X = d.X + 1 + i
p.Y = d.Y + 1 + j
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p.Ch = ' '
p.Bg = d.BgColor
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ps = append(ps, p)
}
}
return ps
}