plugeth/vendor/github.com/gizak/termui/sparkline.go
Péter Szilágyi 289b30715d Godeps, vendor: convert dependency management to trash (#3198)
This commit converts the dependency management from Godeps to the vendor
folder, also switching the tool from godep to trash. Since the upstream tool
lacks a few features proposed via a few PRs, until those PRs are merged in
(if), use github.com/karalabe/trash.

You can update dependencies via trash --update.

All dependencies have been updated to their latest version.

Parts of the build system are reworked to drop old notions of Godeps and
invocation of the go vet command so that it doesn't run against the vendor
folder, as that will just blow up during vetting.

The conversion drops OpenCL (and hence GPU mining support) from ethash and our
codebase. The short reasoning is that there's noone to maintain and having
opencl libs in our deps messes up builds as go install ./... tries to build
them, failing with unsatisfied link errors for the C OpenCL deps.

golang.org/x/net/context is not vendored in. We expect it to be fetched by the
user (i.e. using go get). To keep ci.go builds reproducible the package is
"vendored" in build/_vendor.
2016-10-28 19:05:01 +02:00

168 lines
3.7 KiB
Go

// Copyright 2016 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
// Sparkline is like: ▅▆▂▂▅▇▂▂▃▆▆▆▅▃. The data points should be non-negative integers.
/*
data := []int{4, 2, 1, 6, 3, 9, 1, 4, 2, 15, 14, 9, 8, 6, 10, 13, 15, 12, 10, 5, 3, 6, 1}
spl := termui.NewSparkline()
spl.Data = data
spl.Title = "Sparkline 0"
spl.LineColor = termui.ColorGreen
*/
type Sparkline struct {
Data []int
Height int
Title string
TitleColor Attribute
LineColor Attribute
displayHeight int
scale float32
max int
}
// Sparklines is a renderable widget which groups together the given sparklines.
/*
spls := termui.NewSparklines(spl0,spl1,spl2) //...
spls.Height = 2
spls.Width = 20
*/
type Sparklines struct {
Block
Lines []Sparkline
displayLines int
displayWidth int
}
var sparks = []rune{'▁', '▂', '▃', '▄', '▅', '▆', '▇', '█'}
// Add appends a given Sparkline to s *Sparklines.
func (s *Sparklines) Add(sl Sparkline) {
s.Lines = append(s.Lines, sl)
}
// NewSparkline returns a unrenderable single sparkline that intended to be added into Sparklines.
func NewSparkline() Sparkline {
return Sparkline{
Height: 1,
TitleColor: ThemeAttr("sparkline.title.fg"),
LineColor: ThemeAttr("sparkline.line.fg")}
}
// NewSparklines return a new *Spaklines with given Sparkline(s), you can always add a new Sparkline later.
func NewSparklines(ss ...Sparkline) *Sparklines {
s := &Sparklines{Block: *NewBlock(), Lines: ss}
return s
}
func (sl *Sparklines) update() {
for i, v := range sl.Lines {
if v.Title == "" {
sl.Lines[i].displayHeight = v.Height
} else {
sl.Lines[i].displayHeight = v.Height + 1
}
}
sl.displayWidth = sl.innerArea.Dx()
// get how many lines gotta display
h := 0
sl.displayLines = 0
for _, v := range sl.Lines {
if h+v.displayHeight <= sl.innerArea.Dy() {
sl.displayLines++
} else {
break
}
h += v.displayHeight
}
for i := 0; i < sl.displayLines; i++ {
data := sl.Lines[i].Data
max := 0
for _, v := range data {
if max < v {
max = v
}
}
sl.Lines[i].max = max
if max != 0 {
sl.Lines[i].scale = float32(8*sl.Lines[i].Height) / float32(max)
} else { // when all negative
sl.Lines[i].scale = 0
}
}
}
// Buffer implements Bufferer interface.
func (sl *Sparklines) Buffer() Buffer {
buf := sl.Block.Buffer()
sl.update()
oftY := 0
for i := 0; i < sl.displayLines; i++ {
l := sl.Lines[i]
data := l.Data
if len(data) > sl.innerArea.Dx() {
data = data[len(data)-sl.innerArea.Dx():]
}
if l.Title != "" {
rs := trimStr2Runes(l.Title, sl.innerArea.Dx())
oftX := 0
for _, v := range rs {
w := charWidth(v)
c := Cell{
Ch: v,
Fg: l.TitleColor,
Bg: sl.Bg,
}
x := sl.innerArea.Min.X + oftX
y := sl.innerArea.Min.Y + oftY
buf.Set(x, y, c)
oftX += w
}
}
for j, v := range data {
// display height of the data point, zero when data is negative
h := int(float32(v)*l.scale + 0.5)
if v < 0 {
h = 0
}
barCnt := h / 8
barMod := h % 8
for jj := 0; jj < barCnt; jj++ {
c := Cell{
Ch: ' ', // => sparks[7]
Bg: l.LineColor,
}
x := sl.innerArea.Min.X + j
y := sl.innerArea.Min.Y + oftY + l.Height - jj
//p.Bg = sl.BgColor
buf.Set(x, y, c)
}
if barMod != 0 {
c := Cell{
Ch: sparks[barMod-1],
Fg: l.LineColor,
Bg: sl.Bg,
}
x := sl.innerArea.Min.X + j
y := sl.innerArea.Min.Y + oftY + l.Height - barCnt
buf.Set(x, y, c)
}
}
oftY += l.displayHeight
}
return buf
}