commit 8eba71c643b573bf3892c9255b46cf934943e6c6 · julien.rbrt.fr/tangled-core

+74 -1
appview/pages/markup/markdown.go
···

       3
       3
        
       

     

       4
       4
        
       import (

     

       5
       5
        
       	"bytes"

     

       6
       6
       +
       	"path"

     

       6
       7
        
       

     

       7
       8
        
       	"github.com/yuin/goldmark"

     

       9
       9
       +
       	"github.com/yuin/goldmark/ast"

     

       8
       10
        
       	"github.com/yuin/goldmark/extension"

     

       9
       11
        
       	"github.com/yuin/goldmark/parser"

     

       12
       12
       +
       	"github.com/yuin/goldmark/text"

     

       13
       13
       +
       	"github.com/yuin/goldmark/util"

     

       10
       14
        
       )

     

       11
       15
        
       

     

       12
       12
       -
       func RenderMarkdown(source string) string {

     

       16
       16
       +
       // RendererType defines the type of renderer to use based on context

     

       17
       17
       +
       type RendererType int

     

       18
       18
       +
       

     

       19
       19
       +
       const (

     

       20
       20
       +
       	// RendererTypeRepoMarkdown is for repository documentation markdown files

     

       21
       21
       +
       	RendererTypeRepoMarkdown RendererType = iota

     

       22
       22
       +
       	// RendererTypeIssueComment is for issue comments

     

       23
       23
       +
       	RendererTypeIssueComment

     

       24
       24
       +
       	// RendererTypePullComment is for pull request comments

     

       25
       25
       +
       	RendererTypePullComment

     

       26
       26
       +
       	// RendererTypeDefault is the default renderer with minimal transformations

     

       27
       27
       +
       	RendererTypeDefault

     

       28
       28
       +
       )

     

       29
       29
       +
       

     

       30
       30
       +
       // RenderContext holds the contextual data for rendering markdown.

     

       31
       31
       +
       // It can be initialized empty, and that'll skip any transformations

     

       32
       32
       +
       // and use the default renderer (RendererTypeDefault).

     

       33
       33
       +
       type RenderContext struct {

     

       34
       34
       +
       	Ref          string

     

       35
       35
       +
       	FullRepoName string

     

       36
       36
       +
       	RendererType RendererType

     

       37
       37
       +
       }

     

       38
       38
       +
       

     

       39
       39
       +
       func (rctx *RenderContext) RenderMarkdown(source string) string {

     

       13
       40
        
       	md := goldmark.New(

     

       14
       41
        
       		goldmark.WithExtensions(extension.GFM),

     

       15
       42
        
       		goldmark.WithParserOptions(

     

       16
       43
        
       			parser.WithAutoHeadingID(),

     

       17
       44
        
       		),

     

       18
       45
        
       	)

     

       46
       46
       +
       

     

       47
       47
       +
       	if rctx != nil {

     

       48
       48
       +
       		var transformers []util.PrioritizedValue

     

       49
       49
       +
       

     

       50
       50
       +
       		transformers = append(transformers, util.Prioritized(&MarkdownTransformer{rctx: rctx}, 10000))

     

       51
       51
       +
       

     

       52
       52
       +
       		md.Parser().AddOptions(

     

       53
       53
       +
       			parser.WithASTTransformers(transformers...),

     

       54
       54
       +
       		)

     

       55
       55
       +
       	}

     

       56
       56
       +
       

     

       19
       57
        
       	var buf bytes.Buffer

     

       20
       58
        
       	if err := md.Convert([]byte(source), &buf); err != nil {

     

       21
       59
        
       		return source

     

       22
       60
        
       	}

     

       23
       61
        
       	return buf.String()

     

       24
       62
        
       }

     

       63
       63
       +
       

     

       64
       64
       +
       type MarkdownTransformer struct {

     

       65
       65
       +
       	rctx *RenderContext

     

       66
       66
       +
       }

     

       67
       67
       +
       

     

       68
       68
       +
       func (a *MarkdownTransformer) Transform(node *ast.Document, reader text.Reader, pc parser.Context) {

     

       69
       69
       +
       	_ = ast.Walk(node, func(n ast.Node, entering bool) (ast.WalkStatus, error) {

     

       70
       70
       +
       		if !entering {

     

       71
       71
       +
       			return ast.WalkContinue, nil

     

       72
       72
       +
       		}

     

       73
       73
       +
       

     

       74
       74
       +
       		switch a.rctx.RendererType {

     

       75
       75
       +
       		case RendererTypeRepoMarkdown:

     

       76
       76
       +
       			a.rctx.relativeLinkTransformer(n.(*ast.Link))

     

       77
       77
       +
       		case RendererTypeDefault:

     

       78
       78
       +
       			a.rctx.relativeLinkTransformer(n.(*ast.Link))

     

       79
       79
       +
       			// more types here like RendererTypeIssue/Pull etc.

     

       80
       80
       +
       		}

     

       81
       81
       +
       

     

       82
       82
       +
       		return ast.WalkContinue, nil

     

       83
       83
       +
       	})

     

       84
       84
       +
       }

     

       85
       85
       +
       

     

       86
       86
       +
       func (rctx *RenderContext) relativeLinkTransformer(link *ast.Link) {

     

       87
       87
       +
       	dst := string(link.Destination)

     

       88
       88
       +
       

     

       89
       89
       +
       	if len(dst) == 0 || dst[0] == '#' ||

     

       90
       90
       +
       		bytes.Contains(link.Destination, []byte("://")) ||

     

       91
       91
       +
       		bytes.HasPrefix(link.Destination, []byte("mailto:")) {

     

       92
       92
       +
       		return

     

       93
       93
       +
       	}

     

       94
       94
       +
       

     

       95
       95
       +
       	newPath := path.Join("/", rctx.FullRepoName, "tree", rctx.Ref, dst)

     

       96
       96
       +
       	link.Destination = []byte(newPath)

     

       97
       97
       +
       }
appview/pages/markup/readme.go appview/pages/markup/format.go