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Switch to Pygments-style CSS class names.
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Add GitHub theme + CSS to style importer.
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alecthomas committed Sep 25, 2017
1 parent 2181aa5 commit bdc1124
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136 changes: 136 additions & 0 deletions _tools/css2style/main.go
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package main

import (
"io/ioutil"
"os"
"strings"
"text/template"

"github.com/aymerick/douceur/css"
"github.com/aymerick/douceur/parser"
"gopkg.in/alecthomas/kingpin.v3-unstable"

"github.com/alecthomas/chroma"
)

const (
outputTemplate = `package styles
import (
"github.com/alecthomas/chroma"
)
// {{.Name}} style.
var {{.Name}} = Register(chroma.MustNewStyle("{{.Name|Lower}}", chroma.StyleEntries{
{{- range .Rules}}
{{- if .Prelude|TokenType}}
chroma.{{.Prelude|TokenType}}: "{{.Declarations|TranslateDecls}}",
{{- end}}
{{- end}}
}))
`
)

var (
typeByClass = map[string]chroma.TokenType{
".hll": chroma.Background,
}

cssNamedColours = map[string]string{
"black": "#000000", "silver": "#c0c0c0", "gray": "#808080", "white": "#ffffff",
"maroon": "#800000", "red": "#ff0000", "purple": "#800080", "fuchsia": "#ff00ff",
"green": "#008000", "lime": "#00ff00", "olive": "#808000", "yellow": "#ffff00",
"navy": "#000080", "blue": "#0000ff", "teal": "#008080", "aqua": "#00ffff",
"orange": "#ffa500", "aliceblue": "#f0f8ff", "antiquewhite": "#faebd7", "aquamarine": "#7fffd4",
"azure": "#f0ffff", "beige": "#f5f5dc", "bisque": "#ffe4c4", "blanchedalmond": "#ffebcd",
"blueviolet": "#8a2be2", "brown": "#a52a2a", "burlywood": "#deb887", "cadetblue": "#5f9ea0",
"chartreuse": "#7fff00", "chocolate": "#d2691e", "coral": "#ff7f50", "cornflowerblue": "#6495ed",
"cornsilk": "#fff8dc", "crimson": "#dc143c", "cyan": "#00ffff", "darkblue": "#00008b",
"darkcyan": "#008b8b", "darkgoldenrod": "#b8860b", "darkgray": "#a9a9a9", "darkgreen": "#006400",
"darkgrey": "#a9a9a9", "darkkhaki": "#bdb76b", "darkmagenta": "#8b008b", "darkolivegreen": "#556b2f",
"darkorange": "#ff8c00", "darkorchid": "#9932cc", "darkred": "#8b0000", "darksalmon": "#e9967a",
"darkseagreen": "#8fbc8f", "darkslateblue": "#483d8b", "darkslategray": "#2f4f4f", "darkslategrey": "#2f4f4f",
"darkturquoise": "#00ced1", "darkviolet": "#9400d3", "deeppink": "#ff1493", "deepskyblue": "#00bfff",
"dimgray": "#696969", "dimgrey": "#696969", "dodgerblue": "#1e90ff", "firebrick": "#b22222",
"floralwhite": "#fffaf0", "forestgreen": "#228b22", "gainsboro": "#dcdcdc", "ghostwhite": "#f8f8ff",
"gold": "#ffd700", "goldenrod": "#daa520", "greenyellow": "#adff2f", "grey": "#808080",
"honeydew": "#f0fff0", "hotpink": "#ff69b4", "indianred": "#cd5c5c", "indigo": "#4b0082",
"ivory": "#fffff0", "khaki": "#f0e68c", "lavender": "#e6e6fa", "lavenderblush": "#fff0f5",
"lawngreen": "#7cfc00", "lemonchiffon": "#fffacd", "lightblue": "#add8e6", "lightcoral": "#f08080",
"lightcyan": "#e0ffff", "lightgoldenrodyellow": "#fafad2", "lightgray": "#d3d3d3", "lightgreen": "#90ee90",
"lightgrey": "#d3d3d3", "lightpink": "#ffb6c1", "lightsalmon": "#ffa07a", "lightseagreen": "#20b2aa",
"lightskyblue": "#87cefa", "lightslategray": "#778899", "lightslategrey": "#778899", "lightsteelblue": "#b0c4de",
"lightyellow": "#ffffe0", "limegreen": "#32cd32", "linen": "#faf0e6", "magenta": "#ff00ff",
"mediumaquamarine": "#66cdaa", "mediumblue": "#0000cd", "mediumorchid": "#ba55d3", "mediumpurple": "#9370db",
"mediumseagreen": "#3cb371", "mediumslateblue": "#7b68ee", "mediumspringgreen": "#00fa9a", "mediumturquoise": "#48d1cc",
"mediumvioletred": "#c71585", "midnightblue": "#191970", "mintcream": "#f5fffa", "mistyrose": "#ffe4e1",
"moccasin": "#ffe4b5", "navajowhite": "#ffdead", "oldlace": "#fdf5e6", "olivedrab": "#6b8e23",
"orangered": "#ff4500", "orchid": "#da70d6", "palegoldenrod": "#eee8aa", "palegreen": "#98fb98",
"paleturquoise": "#afeeee", "palevioletred": "#db7093", "papayawhip": "#ffefd5", "peachpuff": "#ffdab9",
"peru": "#cd853f", "pink": "#ffc0cb", "plum": "#dda0dd", "powderblue": "#b0e0e6",
"rosybrown": "#bc8f8f", "royalblue": "#4169e1", "saddlebrown": "#8b4513", "salmon": "#fa8072",
"sandybrown": "#f4a460", "seagreen": "#2e8b57", "seashell": "#fff5ee", "sienna": "#a0522d",
"skyblue": "#87ceeb", "slateblue": "#6a5acd", "slategray": "#708090", "slategrey": "#708090",
"snow": "#fffafa", "springgreen": "#00ff7f", "steelblue": "#4682b4", "tan": "#d2b48c",
"thistle": "#d8bfd8", "tomato": "#ff6347", "turquoise": "#40e0d0", "violet": "#ee82ee",
"wheat": "#f5deb3", "whitesmoke": "#f5f5f5", "yellowgreen": "#9acd32", "rebeccapurple": "#663399",
}

nameArg = kingpin.Arg("name", "Name of output style.").Required().String()
fileArg = kingpin.Arg("stylesheets", ".css file to import").Required().ExistingFile()
)

func init() {
for tt, str := range chroma.StandardTypes {
typeByClass["."+str] = tt
}
}

func translateDecls(decls []*css.Declaration) string {
out := []string{}
for _, decl := range decls {
switch decl.Property {
case "color":
clr := decl.Value
if c, ok := cssNamedColours[clr]; ok {
clr = c
}
out = append(out, clr)
case "background-color":
out = append(out, "bg:"+decl.Value)
case "font-style":
if strings.Contains(decl.Value, "italic") {
out = append(out, "italic")
}
case "font-weight":
if strings.Contains(decl.Value, "bold") {
out = append(out, "bold")
}
case "text-decoration":
if strings.Contains(decl.Value, "underline") {
out = append(out, "underline")
}
}
}
return strings.Join(out, " ")
}

func main() {
kingpin.Parse()
source, err := ioutil.ReadFile(*fileArg)
kingpin.FatalIfError(err, "")
css, err := parser.Parse(string(source))
kingpin.FatalIfError(err, "")

context := map[string]interface{}{
"Name": *nameArg,
"Rules": css.Rules,
}
tmpl := template.Must(template.New("style").Funcs(template.FuncMap{
"Lower": strings.ToLower,
"TranslateDecls": translateDecls,
"TokenType": func(s string) chroma.TokenType { return typeByClass[s] },
}).Parse(outputTemplate))
err = tmpl.Execute(os.Stdout, context)
kingpin.FatalIfError(err, "")
}
20 changes: 8 additions & 12 deletions formatters/html/html.go
Original file line number Diff line number Diff line change
Expand Up @@ -183,19 +183,15 @@ func (f *Formatter) writeHTML(w io.Writer, style *chroma.Style, tokens []*chroma
return nil
}

func (f *Formatter) class(tt chroma.TokenType) string {
switch tt {
case chroma.Background:
return "chroma"
case chroma.LineNumbers:
return "ln"
case chroma.LineHighlight:
return "hl"
}
if tt < 0 {
return fmt.Sprintf("%sss%x", f.prefix, -int(tt))
func (f *Formatter) class(t chroma.TokenType) string {
for t != 0 {
cls, ok := chroma.StandardTypes[t]
if ok {
return cls
}
t = t.Parent()
}
return fmt.Sprintf("%ss%x", f.prefix, int(tt))
return chroma.StandardTypes[t]
}

func (f *Formatter) styleAttr(styles map[chroma.TokenType]string, tt chroma.TokenType) string {
Expand Down
70 changes: 70 additions & 0 deletions styles/github.go
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@@ -0,0 +1,70 @@
package styles

import (
"github.com/alecthomas/chroma"
)

// Github style.
var Github = Register(chroma.MustNewStyle("github", chroma.StyleEntries{
chroma.CommentMultiline: "italic #999988",
chroma.CommentPreproc: "bold #999999",
chroma.CommentSingle: "italic #999988",
chroma.CommentSpecial: "bold italic #999999",
chroma.Comment: "italic #999988",
chroma.Error: "bg:#e3d2d2 #a61717",
chroma.GenericDeleted: "bg:#ffdddd #000000",
chroma.GenericEmph: "italic #000000",
chroma.GenericError: "#aa0000",
chroma.GenericHeading: "#999999",
chroma.GenericInserted: "bg:#ddffdd #000000",
chroma.GenericOutput: "#888888",
chroma.GenericPrompt: "#555555",
chroma.GenericStrong: "bold",
chroma.GenericSubheading: "#aaaaaa",
chroma.GenericTraceback: "#aa0000",
chroma.KeywordConstant: "bold #000000 ",
chroma.KeywordDeclaration: "bold #000000",
chroma.KeywordNamespace: "bold #000000",
chroma.KeywordPseudo: "bold #000000",
chroma.KeywordReserved: "bold #000000",
chroma.KeywordType: "bold #445588",
chroma.Keyword: "bold #000000",
chroma.LiteralNumberFloat: "#009999",
chroma.LiteralNumberHex: "#009999",
chroma.LiteralNumberIntegerLong: "#009999",
chroma.LiteralNumberInteger: "#009999",
chroma.LiteralNumberOct: "#009999",
chroma.LiteralNumber: "#009999",
chroma.LiteralStringBacktick: "#d14",
chroma.LiteralStringChar: "#d14",
chroma.LiteralStringDoc: "#d14",
chroma.LiteralStringDouble: "#d14",
chroma.LiteralStringEscape: "#d14",
chroma.LiteralStringHeredoc: "#d14",
chroma.LiteralStringInterpol: "#d14",
chroma.LiteralStringOther: "#d14",
chroma.LiteralStringRegex: "#009926",
chroma.LiteralStringSingle: "#d14",
chroma.LiteralStringSymbol: "#990073",
chroma.LiteralString: "#d14",
chroma.NameAttribute: "#008080",
chroma.NameBuiltinPseudo: "#999999",
chroma.NameBuiltin: "#0086B3",
chroma.NameClass: "bold #445588",
chroma.NameConstant: "#008080",
chroma.NameDecorator: "bold #3c5d5d",
chroma.NameEntity: "#800080",
chroma.NameException: "bold #990000",
chroma.NameFunction: "bold #990000",
chroma.NameLabel: "bold #990000",
chroma.NameNamespace: "#555555",
chroma.NameTag: "#000080",
chroma.NameVariableClass: "#008080",
chroma.NameVariableGlobal: "#008080",
chroma.NameVariableInstance: "#008080",
chroma.NameVariable: "#008080",
chroma.OperatorWord: "bold #000000",
chroma.Operator: "bold #000000",
chroma.TextWhitespace: "#bbbbbb",
chroma.Background: " bg:#ffffff",
}))
106 changes: 106 additions & 0 deletions types.go
Original file line number Diff line number Diff line change
Expand Up @@ -188,6 +188,112 @@ const (
NumberOct = LiteralNumberOct
)

var (
StandardTypes = map[TokenType]string{
Background: "chroma",
LineNumbers: "ln",
LineHighlight: "hl",

Text: "",
Whitespace: "w",
Error: "err",
Other: "x",
// I have no idea what this is used for...
// Escape: "esc",

Keyword: "k",
KeywordConstant: "kc",
KeywordDeclaration: "kd",
KeywordNamespace: "kn",
KeywordPseudo: "kp",
KeywordReserved: "kr",
KeywordType: "kt",

Name: "n",
NameAttribute: "na",
NameBuiltin: "nb",
NameBuiltinPseudo: "bp",
NameClass: "nc",
NameConstant: "no",
NameDecorator: "nd",
NameEntity: "ni",
NameException: "ne",
NameFunction: "nf",
NameFunctionMagic: "fm",
NameProperty: "py",
NameLabel: "nl",
NameNamespace: "nn",
NameOther: "nx",
NameTag: "nt",
NameVariable: "nv",
NameVariableClass: "vc",
NameVariableGlobal: "vg",
NameVariableInstance: "vi",
NameVariableMagic: "vm",

Literal: "l",
LiteralDate: "ld",

String: "s",
StringAffix: "sa",
StringBacktick: "sb",
StringChar: "sc",
StringDelimiter: "dl",
StringDoc: "sd",
StringDouble: "s2",
StringEscape: "se",
StringHeredoc: "sh",
StringInterpol: "si",
StringOther: "sx",
StringRegex: "sr",
StringSingle: "s1",
StringSymbol: "ss",

Number: "m",
NumberBin: "mb",
NumberFloat: "mf",
NumberHex: "mh",
NumberInteger: "mi",
NumberIntegerLong: "il",
NumberOct: "mo",

Operator: "o",
OperatorWord: "ow",

Punctuation: "p",

Comment: "c",
CommentHashbang: "ch",
CommentMultiline: "cm",
CommentPreproc: "cp",
CommentPreprocFile: "cpf",
CommentSingle: "c1",
CommentSpecial: "cs",

Generic: "g",
GenericDeleted: "gd",
GenericEmph: "ge",
GenericError: "gr",
GenericHeading: "gh",
GenericInserted: "gi",
GenericOutput: "go",
GenericPrompt: "gp",
GenericStrong: "gs",
GenericSubheading: "gu",
GenericTraceback: "gt",
}
)

func (t TokenType) Parent() TokenType {
if t%100 != 0 {
return t / 100 * 100
}
if t%1000 != 0 {
return t / 1000 * 1000
}
return 0
}

func (t TokenType) Category() TokenType {
return t / 1000 * 1000
}
Expand Down

1 comment on commit bdc1124

@kaushalmodi
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@kaushalmodi kaushalmodi commented on bdc1124 Sep 26, 2017

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Thank you! This is a big plus! Now switching from Pygments to Chroma is completely transparent! My previously generated Pygments theme CSS file just works!

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