Add Jupyter Notebook (.ipynb) rendering support

modules/markup/external/frontend.go

@@ -4,16 +4,12 @@
 package external
 
 import (
-	"bytes"
 	"encoding/base64"
 	"io"
-	"strings"
 	"unicode/utf8"
 
 	"code.gitea.io/gitea/modules/htmlutil"
-	"code.gitea.io/gitea/modules/json"
 	"code.gitea.io/gitea/modules/markup"
-	"code.gitea.io/gitea/modules/markup/markdown"
 	"code.gitea.io/gitea/modules/public"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/util"
@@ -62,46 +58,6 @@ func (p *frontendRenderer) GetExternalRendererOptions() (ret markup.ExternalRend
 	return ret
 }
 
-type notebookCell struct {
-	CellType string           `json:"cell_type"`
-	Source   []string         `json:"source"`
-	Outputs  []map[string]any `json:"outputs,omitempty"`
-}
-
-type notebookData struct {
-	Cells         []notebookCell `json:"cells"`
-	Metadata      map[string]any `json:"metadata,omitempty"`
-	Nbformat      int            `json:"nbformat,omitempty"`
-	NbformatMinor int            `json:"nbformat_minor,omitempty"`
-}
-
-func preprocessJupyterNotebook(ctx *markup.RenderContext, input io.Reader) ([]byte, error) {
-	content, err := io.ReadAll(input)
-	if err != nil {
-		return nil, err
-	}
-
-	var nb notebookData
-	if err := json.Unmarshal(content, &nb); err != nil {
-		return content, nil
-	}
-
-	for i := range nb.Cells {
-		if nb.Cells[i].CellType == "markdown" {
-			var sourceBuilder strings.Builder
-			for _, line := range nb.Cells[i].Source {
-				sourceBuilder.WriteString(line)
-			}
-			var buf bytes.Buffer
-			if err := markdown.RenderRaw(ctx, bytes.NewReader([]byte(sourceBuilder.String())), &buf); err == nil {
-				nb.Cells[i].Source = []string{buf.String()}
-			}
-		}
-	}
-
-	return json.Marshal(nb)
-}
-
 func (p *frontendRenderer) Render(ctx *markup.RenderContext, input io.Reader, output io.Writer) error {
 	if ctx.RenderOptions.StandalonePageOptions == nil {
 		opts := p.GetExternalRendererOptions()
@@ -113,13 +69,6 @@ func (p *frontendRenderer) Render(ctx *markup.RenderContext, input io.Reader, ou
 		return err
 	}
 
-	if p.name == "jupyter-notebook" {
-		preprocessed, err := preprocessJupyterNotebook(ctx, bytes.NewReader(content))
-		if err == nil {
-			content = preprocessed
-		}
-	}
-
 	contentEncoding, contentString := "text", util.UnsafeBytesToString(content)
 	if !utf8.Valid(content) {
 		contentEncoding = "base64"
@@ -132,7 +81,6 @@ func (p *frontendRenderer) Render(ctx *markup.RenderContext, input io.Reader, ou
 <head>
 	<!-- external-render-helper will be injected here by the markup render -->
 	<meta name="viewport" content="width=device-width, initial-scale=1">
-	<link rel="stylesheet" href="%s">
 </head>
 <body>
 	<div id="frontend-render-viewer" data-frontend-renders="%s" data-file-tree-path="%s"></div>
@@ -140,7 +88,6 @@ func (p *frontendRenderer) Render(ctx *markup.RenderContext, input io.Reader, ou
 	<script nonce type="module" src="%s"></script>
 </body>
 </html>`,
-		public.AssetURI("css/index.css"),
 		p.name, ctx.RenderOptions.RelativePath,
 		contentEncoding, contentString,
 		public.AssetURI("js/external-render-frontend.js"))