forked from kroitor/asciichart
-
Notifications
You must be signed in to change notification settings - Fork 0
/
asciichart.js
110 lines (96 loc) · 4.52 KB
/
asciichart.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
"use strict";
(function (exports) {
// control sequences for coloring
exports.black = "\x1b[30m"
exports.red = "\x1b[31m"
exports.green = "\x1b[32m"
exports.yellow = "\x1b[33m"
exports.blue = "\x1b[34m"
exports.magenta = "\x1b[35m"
exports.cyan = "\x1b[36m"
exports.lightgray = "\x1b[37m"
exports.default = "\x1b[39m"
exports.darkgray = "\x1b[90m"
exports.lightred = "\x1b[91m"
exports.lightgreen = "\x1b[92m"
exports.lightyellow = "\x1b[93m"
exports.lightblue = "\x1b[94m"
exports.lightmagenta = "\x1b[95m"
exports.lightcyan = "\x1b[96m"
exports.white = "\x1b[97m"
exports.reset = "\x1b[0m"
function colored (char, color) {
// do not color it if color is not specified
return (color === undefined) ? char : (color + char + exports.reset)
}
exports.colored = colored
exports.plot = function (series, cfg = undefined) {
// this function takes both one array and array of arrays
// if an array of numbers is passed it is transformed to
// an array of exactly one array with numbers
if (typeof(series[0]) == "number"){
series = [series]
}
cfg = (typeof cfg !== 'undefined') ? cfg : {}
let min = (typeof cfg.min !== 'undefined') ? cfg.min : series[0][0]
let max = (typeof cfg.max !== 'undefined') ? cfg.max : series[0][0]
for (let j = 0; j < series.length; j++) {
for (let i = 0; i < series[j].length; i++) {
min = Math.min(min, series[j][i])
max = Math.max(max, series[j][i])
}
}
let defaultSymbols = [ '┼', '┤', '╶', '╴', '─', '╰', '╭', '╮', '╯', '│' ]
let range = Math.abs (max - min)
let offset = (typeof cfg.offset !== 'undefined') ? cfg.offset : 3
let padding = (typeof cfg.padding !== 'undefined') ? cfg.padding : ' '
let height = (typeof cfg.height !== 'undefined') ? cfg.height : range
let colors = (typeof cfg.colors !== 'undefined') ? cfg.colors : []
let ratio = range !== 0 ? height / range : 1;
let min2 = Math.round (min * ratio)
let max2 = Math.round (max * ratio)
let rows = Math.abs (max2 - min2)
let width = 0
for (let i = 0; i < series.length; i++) {
width = Math.max(width, series[i].length)
}
width = width + offset
let symbols = (typeof cfg.symbols !== 'undefined') ? cfg.symbols : defaultSymbols
let format = (typeof cfg.format !== 'undefined') ? cfg.format : function (x) {
return (padding + x.toFixed (2)).slice (-padding.length)
}
let result = new Array (rows + 1) // empty space
for (let i = 0; i <= rows; i++) {
result[i] = new Array (width)
for (let j = 0; j < width; j++) {
result[i][j] = ' '
}
}
for (let y = min2; y <= max2; ++y) { // axis + labels
let label = format (rows > 0 ? max - (y - min2) * range / rows : y, y - min2)
result[y - min2][Math.max (offset - label.length, 0)] = label
result[y - min2][offset - 1] = (y == 0) ? symbols[0] : symbols[1]
}
for (let j = 0; j < series.length; j++) {
let currentColor = colors[j % colors.length]
let y0 = Math.round (series[j][0] * ratio) - min2
result[rows - y0][offset - 1] = colored(symbols[0], currentColor) // first value
for (let x = 0; x < series[j].length - 1; x++) { // plot the line
let y0 = Math.round (series[j][x + 0] * ratio) - min2
let y1 = Math.round (series[j][x + 1] * ratio) - min2
if (y0 == y1) {
result[rows - y0][x + offset] = colored(symbols[4], currentColor)
} else {
result[rows - y1][x + offset] = colored((y0 > y1) ? symbols[5] : symbols[6], currentColor)
result[rows - y0][x + offset] = colored((y0 > y1) ? symbols[7] : symbols[8], currentColor)
let from = Math.min (y0, y1)
let to = Math.max (y0, y1)
for (let y = from + 1; y < to; y++) {
result[rows - y][x + offset] = colored(symbols[9], currentColor)
}
}
}
}
return result.map (function (x) { return x.join ('') }).join ('\n')
}
}) (typeof exports === 'undefined' ? /* istanbul ignore next */ this['asciichart'] = {} : exports);