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// Copyright © 2019 Botond Sipos
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package thist
import (
"fmt"
terminal "golang.org/x/crypto/ssh/terminal"
"os"
"strconv"
"strings"
)
// Plot is a general plotting function for bar plots. It is used by Bar and BarSimple.
func Plot(x, y []float64, xlab, ylab []string, title string, info []string, symbol, negSymbol, space, top, vbar, hbar, tvbar string) string {
if len(x) == 0 {
return ""
}
// Based on: http://pyinsci.blogspot.com/2009/10/ascii-histograms.html
width, height, terr := terminal.GetSize(int(os.Stderr.Fd()))
if terr != nil {
width = 80
height = 24
}
xll := stringsMaxLen(xlab)
yll := stringsMaxLen(ylab)
width -= yll + 1
res := strings.Repeat(space, yll+1) + centerPad2Len(title, space, int(width)) + "\n"
height -= 4
height -= len(info)
height -= xll + 1
xf := xFactor(len(x), int(width))
if xf < 1 {
xf = 1
}
if xll < xf-2 {
height += xll - 1
}
ny := normalizeY(y, int(height))
block := strings.Repeat(symbol, xf)
nblock := strings.Repeat(negSymbol, xf)
if xf > 2 {
block = vbar + strings.Repeat(symbol, xf-2) + vbar
nblock = vbar + strings.Repeat(negSymbol, xf-2) + vbar
}
blank := strings.Repeat(space, xf)
topBar := strings.Repeat(top, xf)
for l := int(height); l > 0; l-- {
if yll > 0 {
found := false
for i, t := range ny {
if l == t {
res += fmt.Sprintf("%-"+strconv.Itoa(yll)+"s"+tvbar, ylab[i])
found = true
break
}
}
if !found {
res += strings.Repeat(space, yll) + vbar
}
}
for _, c := range ny {
if l == abs(c) {
res += topBar
} else if l < abs(c) {
if c < 0 {
res += nblock
} else {
res += block
}
} else {
res += blank
}
}
res += "\n"
}
if xll > 0 {
res += strings.Repeat(space, yll) + vbar + strings.Repeat(hbar, int(width)) + "\n"
if xll < xf-2 {
res += strings.Repeat(space, yll) + vbar
for _, xl := range xlab {
res += vbar + rightPad2Len(xl, space, xf-1)
}
} else {
for i := 0; i < xll; i++ {
res += strings.Repeat(space, yll) + vbar
for j := yll + 1; j < int(width); j++ {
if (j-yll-1)%xf == 0 {
bin := (j - yll - 1) / xf
if bin < len(xlab) && i < len(xlab[bin]) {
res += string(xlab[bin][i])
} else {
res += space
}
} else {
res += space
}
}
res += "\n"
}
}
}
for _, il := range info {
res += strings.Repeat(space, yll) + vbar + centerPad2Len(il, space, int(width)) + "\n"
}
return res
}
// normalizeY normalizes y values to a maximum height.
func normalizeY(y []float64, height int) []int {
max := max(y)
res := make([]int, len(y))
for i, x := range y {
res[i] = int(x / max * float64(height))
}
return res
}
// xFactor.
func xFactor(n int, width int) int {
return int(width / n)
}
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