mirror of
https://github.com/alecthomas/chroma.git
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Add Chroma playground.
Found here: https://swapoff.org/chroma/playground
This commit is contained in:
Alec Thomas
parent
2b84f4bd4d
commit
10cee2ee79
183
cmd/chromad/main.go
Normal file
183
cmd/chromad/main.go
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@ -0,0 +1,183 @@
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package main
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import (
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"html/template"
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"log"
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"net/http"
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"sort"
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"strings"
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"github.com/alecthomas/kong"
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"github.com/alecthomas/chroma"
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"github.com/alecthomas/chroma/formatters/html"
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"github.com/alecthomas/chroma/lexers"
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"github.com/alecthomas/chroma/styles"
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)
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var htmlTemplate = template.Must(template.New("html").Parse(`
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<!doctype html>
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<html>
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<head>
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<title>Chroma Playground</title>
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<!-- other stuff here -->
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<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bulma/0.7.5/css/bulma.min.css" />
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<style>
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textarea {
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font-family:Consolas,Monaco,Lucida Console,Liberation Mono,DejaVu Sans Mono,Bitstream Vera Sans Mono,Courier New, monospace;
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}
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#output {
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{{.Background}}
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}
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#output pre {
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padding: 0;
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}
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</style>
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</head>
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<body>
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<div class="container">
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{{if .Error}}<div class="notification">{{.Error}}</div>{{end}}
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<h1 class="title">Chroma Playground</h1>
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<form method="post">
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<div class="columns">
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<div class="column field">
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<label class="label">Language</label>
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<div class="control">
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<div class="select">
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<select name="language">
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<option value="" disabled{{if eq "" $.SelectedLanguage}} selected{{end}}>Language</option>
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{{- range .Languages}}
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<option value="{{.}}"{{if eq . $.SelectedLanguage}} selected{{end}}>{{.}}</option>
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{{end -}}
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</select>
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</div>
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</div>
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</div>
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<div class="column field">
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<label class="label">Style</label>
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<div class="control">
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<div class="select">
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<select name="style">
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<option value="" disabled{{if eq "" $.SelectedStyle}} selected{{end}}>Style</option>
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{{- range .Styles}}
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<option value="{{.}}"{{if eq . $.SelectedStyle}} selected{{end}}>{{.}}</option>
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{{end -}}
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</select>
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</div>
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</div>
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</div>
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</div>
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<div class="field">
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<label class="label">Code</label>
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<div class="control">
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<textarea class="textarea" name="text" rows="25" cols="80">{{.Text}}</textarea>
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</div>
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</div>
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<div class="field">
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<div class="control">
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<button class="button is-link">Submit</button>
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</div>
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</div>
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<hr>
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<label class="label">Output</label>
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<div class="field box" id="output">
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{{.HTML}}
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</div>
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</form>
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</div>
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</body>
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</html>
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`))
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var cli struct {
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Bind string `help:"HTTP bind address." default:"127.0.0.1:8080"`
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}
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type context struct {
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Background template.CSS
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SelectedLanguage string
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Languages []string
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SelectedStyle string
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Styles []string
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Text string
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HTML template.HTML
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Error string
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}
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func handler(w http.ResponseWriter, r *http.Request) {
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ctx := contextFromRequest(r)
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style := styles.Get(ctx.SelectedStyle)
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if style == nil {
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style = styles.Fallback
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}
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ctx.Background = template.CSS(html.StyleEntryToCSS(style.Get(chroma.Background)))
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language := lexers.Get(ctx.SelectedLanguage)
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if language == nil {
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language = lexers.Analyse(ctx.Text)
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if language != nil {
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ctx.SelectedLanguage = language.Config().Name
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}
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}
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if language == nil {
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language = lexers.Fallback
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}
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tokens, err := language.Tokenise(nil, ctx.Text)
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if err != nil {
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ctx.Error = err.Error()
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} else {
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buf := &strings.Builder{}
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formatter := html.New()
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err = formatter.Format(buf, style, tokens)
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if err != nil {
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ctx.Error = err.Error()
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} else {
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ctx.HTML = template.HTML(buf.String())
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}
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}
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err = htmlTemplate.Execute(w, &ctx)
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if err != nil {
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panic(err)
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}
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}
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func contextFromRequest(r *http.Request) context {
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err := r.ParseForm()
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ctx := context{
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SelectedLanguage: r.Form.Get("language"),
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SelectedStyle: r.Form.Get("style"),
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Text: r.Form.Get("text"),
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}
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if err != nil {
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ctx.Error = err.Error()
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return ctx
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}
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if ctx.SelectedStyle == "" {
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ctx.SelectedStyle = "monokailight"
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}
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for _, lexer := range lexers.Registry.Lexers {
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ctx.Languages = append(ctx.Languages, lexer.Config().Name)
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}
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sort.Strings(ctx.Languages)
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for _, style := range styles.Registry {
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ctx.Styles = append(ctx.Styles, style.Name)
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}
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sort.Strings(ctx.Styles)
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return ctx
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}
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func main() {
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ctx := kong.Parse(&cli)
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log.Println("Starting")
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err := http.ListenAndServe(cli.Bind, http.HandlerFunc(handler))
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ctx.FatalIfErrorf(err)
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}
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5
go.mod
5
go.mod
@ -4,12 +4,13 @@ require (
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github.com/alecthomas/assert v0.0.0-20170929043011-405dbfeb8e38
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github.com/alecthomas/colour v0.0.0-20160524082231-60882d9e2721 // indirect
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github.com/alecthomas/kong v0.1.15
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github.com/alecthomas/repr v0.0.0-20180818092828-117648cd9897 // indirect
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github.com/alecthomas/repr v0.0.0-20180818092828-117648cd9897
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github.com/danwakefield/fnmatch v0.0.0-20160403171240-cbb64ac3d964
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github.com/dlclark/regexp2 v1.1.6
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github.com/elliotchance/pepper v0.5.0 // indirect
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github.com/mattn/go-colorable v0.0.9
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github.com/mattn/go-isatty v0.0.4
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github.com/sergi/go-diff v1.0.0 // indirect
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github.com/stretchr/testify v1.2.2
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github.com/stretchr/testify v1.3.0
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golang.org/x/sys v0.0.0-20181128092732-4ed8d59d0b35 // indirect
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)
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12
go.sum
12
go.sum
@ -1,3 +1,4 @@
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github.com/PuerkitoBio/goquery v1.5.0/go.mod h1:qD2PgZ9lccMbQlc7eEOjaeRlFQON7xY8kdmcsrnKqMg=
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github.com/alecthomas/assert v0.0.0-20170929043011-405dbfeb8e38 h1:smF2tmSOzy2Mm+0dGI2AIUHY+w0BUc+4tn40djz7+6U=
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github.com/alecthomas/assert v0.0.0-20170929043011-405dbfeb8e38/go.mod h1:r7bzyVFMNntcxPZXK3/+KdruV1H5KSlyVY0gc+NgInI=
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github.com/alecthomas/colour v0.0.0-20160524082231-60882d9e2721 h1:JHZL0hZKJ1VENNfmXvHbgYlbUOvpzYzvy2aZU5gXVeo=
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@ -6,12 +7,18 @@ github.com/alecthomas/kong v0.1.15 h1:IWBg+KrLvoHBicD50OzMI8fKjrtAa1okMR9g38HVM/
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github.com/alecthomas/kong v0.1.15/go.mod h1:0m2VYms8rH0qbCqVB2gvGHk74bqLIq0HXjCs5bNbNQU=
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github.com/alecthomas/repr v0.0.0-20180818092828-117648cd9897 h1:p9Sln00KOTlrYkxI1zYWl1QLnEqAqEARBEYa8FQnQcY=
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github.com/alecthomas/repr v0.0.0-20180818092828-117648cd9897/go.mod h1:xTS7Pm1pD1mvyM075QCDSRqH6qRLXylzS24ZTpRiSzQ=
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github.com/andybalholm/cascadia v1.0.0/go.mod h1:GsXiBklL0woXo1j/WYWtSYYC4ouU9PqHO0sqidkEA4Y=
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github.com/danwakefield/fnmatch v0.0.0-20160403171240-cbb64ac3d964 h1:y5HC9v93H5EPKqaS1UYVg1uYah5Xf51mBfIoWehClUQ=
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github.com/danwakefield/fnmatch v0.0.0-20160403171240-cbb64ac3d964/go.mod h1:Xd9hchkHSWYkEqJwUGisez3G1QY8Ryz0sdWrLPMGjLk=
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github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
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github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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github.com/dlclark/regexp2 v1.1.6 h1:CqB4MjHw0MFCDj+PHHjiESmHX+N7t0tJzKvC6M97BRg=
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github.com/dlclark/regexp2 v1.1.6/go.mod h1:2pZnwuY/m+8K6iRw6wQdMtk+rH5tNGR1i55kozfMjCc=
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github.com/elliotchance/pepper v0.5.0 h1:ZwjtgTvqM43Z6Rxla47peIKDo+/ec5zTpQADbXoa3q0=
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github.com/elliotchance/pepper v0.5.0/go.mod h1:m8ad8rNGcEp8pvLUgqCFPRO38n7QCEpuZStlGT1owf4=
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github.com/gorilla/websocket v1.4.0 h1:WDFjx/TMzVgy9VdMMQi2K2Emtwi2QcUQsztZ/zLaH/Q=
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github.com/gorilla/websocket v1.4.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
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github.com/mattn/go-colorable v0.0.9 h1:UVL0vNpWh04HeJXV0KLcaT7r06gOH2l4OW6ddYRUIY4=
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github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=
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github.com/mattn/go-isatty v0.0.4 h1:bnP0vzxcAdeI1zdubAl5PjU6zsERjGZb7raWodagDYs=
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@ -20,7 +27,12 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
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github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
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github.com/sergi/go-diff v1.0.0 h1:Kpca3qRNrduNnOQeazBd0ysaKrUJiIuISHxogkT9RPQ=
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github.com/sergi/go-diff v1.0.0/go.mod h1:0CfEIISq7TuYL3j771MWULgwwjU+GofnZX9QAmXWZgo=
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github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
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github.com/stretchr/objx v0.2.0/go.mod h1:qt09Ya8vawLte6SNmTgCsAVtYtaKzEcn8ATUoHMkEqE=
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github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
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github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
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github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
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golang.org/x/net v0.0.0-20180218175443-cbe0f9307d01/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
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golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
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golang.org/x/sys v0.0.0-20181128092732-4ed8d59d0b35 h1:YAFjXN64LMvktoUZH9zgY4lGc/msGN7HQfoSuKCgaDU=
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golang.org/x/sys v0.0.0-20181128092732-4ed8d59d0b35/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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