mirror of https://github.com/cjbassi/gotop.git
80 lines
2.0 KiB
Go
80 lines
2.0 KiB
Go
package termui
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var SPARKS = [8]rune{'▁', '▂', '▃', '▄', '▅', '▆', '▇', '█'}
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// Sparkline is like: ▅▆▂▂▅▇▂▂▃▆▆▆▅▃. The data points should be non-negative integers.
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type Sparkline struct {
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Data []int
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Title1 string
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Title2 string
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TitleColor Color
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Total int
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LineColor Color
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}
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// Sparklines is a renderable widget which groups together the given sparklines.
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type Sparklines struct {
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*Block
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Lines []*Sparkline
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}
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// Add appends a given Sparkline to s *Sparklines.
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func (s *Sparklines) Add(sl Sparkline) {
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s.Lines = append(s.Lines, &sl)
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}
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// NewSparkline returns a unrenderable single sparkline that intended to be added into Sparklines.
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func NewSparkline() *Sparkline {
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return &Sparkline{
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TitleColor: Theme.Fg,
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LineColor: Theme.Sparkline,
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}
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}
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// NewSparklines return a new *Sparklines with given Sparkline(s), you can always add a new Sparkline later.
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func NewSparklines(ss ...*Sparkline) *Sparklines {
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return &Sparklines{
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Block: NewBlock(),
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Lines: ss,
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}
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}
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// Buffer implements Bufferer interface.
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func (sl *Sparklines) Buffer() *Buffer {
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buf := sl.Block.Buffer()
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lc := len(sl.Lines) // lineCount
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// for each line
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for i, line := range sl.Lines {
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title1Y := 2 + (sl.Y/lc)*i
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title2Y := (2 + (sl.Y/lc)*i) + 1
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title1 := MaxString(line.Title1, sl.X)
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title2 := MaxString(line.Title2, sl.X)
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buf.SetString(1, title1Y, title1, line.TitleColor|AttrBold, sl.Bg)
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buf.SetString(1, title2Y, title2, line.TitleColor|AttrBold, sl.Bg)
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// sparkline
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sparkY := (sl.Y / lc) * (i + 1)
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// finds max used for relative heights
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max := 1
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for i := len(line.Data) - 1; i >= 0 && sl.X-((len(line.Data)-1)-i) >= 1; i-- {
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if line.Data[i] > max {
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max = line.Data[i]
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}
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}
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// prints sparkline
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for x := sl.X; x >= 1; x-- {
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char := SPARKS[0]
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if (sl.X - x) < len(line.Data) {
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char = SPARKS[int((float64(line.Data[(len(line.Data)-1)-(sl.X-x)])/float64(max))*7)]
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}
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buf.SetCell(x, sparkY, Cell{char, line.LineColor, sl.Bg})
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}
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}
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return buf
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}
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