mirror of
https://github.com/thomiceli/opengist.git
synced 2024-12-23 04:52:40 +00:00
148 lines
3.3 KiB
Go
148 lines
3.3 KiB
Go
package render
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import (
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"bufio"
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"bytes"
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"fmt"
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"github.com/alecthomas/chroma/v2"
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"github.com/alecthomas/chroma/v2/formatters/html"
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"github.com/alecthomas/chroma/v2/lexers"
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"github.com/alecthomas/chroma/v2/styles"
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"github.com/rs/zerolog/log"
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"github.com/thomiceli/opengist/internal/db"
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"github.com/thomiceli/opengist/internal/git"
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)
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type RenderedFile struct {
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*git.File
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Type string `json:"type"`
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Lines []string `json:"-"`
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HTML string `json:"-"`
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}
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type RenderedGist struct {
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*db.Gist
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Lines []string
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HTML string
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}
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func HighlightFile(file *git.File) (RenderedFile, error) {
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rendered := RenderedFile{
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File: file,
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}
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style := newStyle()
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lexer := newLexer(file.Filename)
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if lexer.Config().Name == "markdown" {
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return MarkdownFile(file)
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}
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formatter := html.New(html.WithClasses(true), html.PreventSurroundingPre(true))
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iterator, err := lexer.Tokenise(nil, file.Content+"\n")
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if err != nil {
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return rendered, err
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}
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htmlbuf := bytes.Buffer{}
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w := bufio.NewWriter(&htmlbuf)
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tokensLines := chroma.SplitTokensIntoLines(iterator.Tokens())
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lines := make([]string, 0, len(tokensLines))
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for _, tokens := range tokensLines {
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iterator = chroma.Literator(tokens...)
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err = formatter.Format(&htmlbuf, style, iterator)
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if err != nil {
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return rendered, fmt.Errorf("unable to format code: %w", err)
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}
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lines = append(lines, htmlbuf.String())
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htmlbuf.Reset()
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}
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_ = w.Flush()
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rendered.Lines = lines
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rendered.Type = parseFileTypeName(*lexer.Config())
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return rendered, err
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}
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func HighlightFiles(files []*git.File) ([]RenderedFile, error) {
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renderedFiles := make([]RenderedFile, 0, len(files))
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for _, file := range files {
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rendered, err := HighlightFile(file)
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if err != nil {
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log.Warn().Err(err).Msg("Error rendering gist preview for " + file.Filename)
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}
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renderedFiles = append(renderedFiles, rendered)
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}
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return renderedFiles, nil
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}
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func HighlightGistPreview(gist *db.Gist) (RenderedGist, error) {
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rendered := RenderedGist{
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Gist: gist,
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}
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style := newStyle()
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lexer := newLexer(gist.PreviewFilename)
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if lexer.Config().Name == "markdown" {
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return MarkdownGistPreview(gist)
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}
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formatter := html.New(html.WithClasses(true), html.PreventSurroundingPre(true))
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iterator, err := lexer.Tokenise(nil, gist.Preview)
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if err != nil {
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return rendered, err
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}
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htmlbuf := bytes.Buffer{}
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w := bufio.NewWriter(&htmlbuf)
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tokensLines := chroma.SplitTokensIntoLines(iterator.Tokens())
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lines := make([]string, 0, len(tokensLines))
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for _, tokens := range tokensLines {
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iterator = chroma.Literator(tokens...)
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err = formatter.Format(&htmlbuf, style, iterator)
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if err != nil {
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return rendered, fmt.Errorf("unable to format code: %w", err)
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}
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lines = append(lines, htmlbuf.String())
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htmlbuf.Reset()
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}
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_ = w.Flush()
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rendered.Lines = lines
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return rendered, err
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}
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func parseFileTypeName(config chroma.Config) string {
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fileType := config.Name
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if fileType == "fallback" || fileType == "plaintext" {
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return "Text"
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}
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return fileType
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}
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func newLexer(filename string) chroma.Lexer {
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var lexer chroma.Lexer
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if lexer = lexers.Get(filename); lexer == nil {
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lexer = lexers.Fallback
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}
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return lexer
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}
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func newStyle() *chroma.Style {
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var style *chroma.Style
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if style = styles.Get("catppuccin-latte"); style == nil {
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style = styles.Fallback
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}
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return style
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}
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