patch of appview/pages: markup: add `@` user-mention parsing in markdown · round #9 · pull #736 · tangled.org/core

+111

appview/pages/markup/extension/atlink.go

···

       1
       +
       // heavily inspired by: https://github.com/kaleocheng/goldmark-extensions

     

       2
       +
       

     

       3
       +
       package extension

     

       4
       +
       

     

       5
       +
       import (

     

       6
       +
       	"regexp"

     

       7
       +
       

     

       8
       +
       	"github.com/yuin/goldmark"

     

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

     

       10
       +
       	"github.com/yuin/goldmark/parser"

     

       11
       +
       	"github.com/yuin/goldmark/renderer"

     

       12
       +
       	"github.com/yuin/goldmark/renderer/html"

     

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

     

       14
       +
       	"github.com/yuin/goldmark/util"

     

       15
       +
       )

     

       16
       +
       

     

       17
       +
       // An AtNode struct represents an AtNode

     

       18
       +
       type AtNode struct {

     

       19
       +
       	handle string

     

       20
       +
       	ast.BaseInline

     

       21
       +
       }

     

       22
       +
       

     

       23
       +
       var _ ast.Node = &AtNode{}

     

       24
       +
       

     

       25
       +
       // Dump implements Node.Dump.

     

       26
       +
       func (n *AtNode) Dump(source []byte, level int) {

     

       27
       +
       	ast.DumpHelper(n, source, level, nil, nil)

     

       28
       +
       }

     

       29
       +
       

     

       30
       +
       // KindAt is a NodeKind of the At node.

     

       31
       +
       var KindAt = ast.NewNodeKind("At")

     

       32
       +
       

     

       33
       +
       // Kind implements Node.Kind.

     

       34
       +
       func (n *AtNode) Kind() ast.NodeKind {

     

       35
       +
       	return KindAt

     

       36
       +
       }

     

       37
       +
       

     

       38
       +
       var atRegexp = regexp.MustCompile(`(^|\s|\()(@)([a-zA-Z0-9.-]+)(\b)`)

     

       39
       +
       

     

       40
       +
       type atParser struct{}

     

       41
       +
       

     

       42
       +
       // NewAtParser return a new InlineParser that parses

     

       43
       +
       // at expressions.

     

       44
       +
       func NewAtParser() parser.InlineParser {

     

       45
       +
       	return &atParser{}

     

       46
       +
       }

     

       47
       +
       

     

       48
       +
       func (s *atParser) Trigger() []byte {

     

       49
       +
       	return []byte{'@'}

     

       50
       +
       }

     

       51
       +
       

     

       52
       +
       func (s *atParser) Parse(parent ast.Node, block text.Reader, pc parser.Context) ast.Node {

     

       53
       +
       	line, segment := block.PeekLine()

     

       54
       +
       	m := atRegexp.FindSubmatchIndex(line)

     

       55
       +
       	if m == nil {

     

       56
       +
       		return nil

     

       57
       +
       	}

     

       58
       +
       	atSegment := text.NewSegment(segment.Start, segment.Start+m[1])

     

       59
       +
       	block.Advance(m[1])

     

       60
       +
       	node := &AtNode{}

     

       61
       +
       	node.AppendChild(node, ast.NewTextSegment(atSegment))

     

       62
       +
       	node.handle = string(atSegment.Value(block.Source())[1:])

     

       63
       +
       	return node

     

       64
       +
       }

     

       65
       +
       

     

       66
       +
       // atHtmlRenderer is a renderer.NodeRenderer implementation that

     

       67
       +
       // renders At nodes.

     

       68
       +
       type atHtmlRenderer struct {

     

       69
       +
       	html.Config

     

       70
       +
       }

     

       71
       +
       

     

       72
       +
       // NewAtHTMLRenderer returns a new AtHTMLRenderer.

     

       73
       +
       func NewAtHTMLRenderer(opts ...html.Option) renderer.NodeRenderer {

     

       74
       +
       	r := &atHtmlRenderer{

     

       75
       +
       		Config: html.NewConfig(),

     

       76
       +
       	}

     

       77
       +
       	for _, opt := range opts {

     

       78
       +
       		opt.SetHTMLOption(&r.Config)

     

       79
       +
       	}

     

       80
       +
       	return r

     

       81
       +
       }

     

       82
       +
       

     

       83
       +
       // RegisterFuncs implements renderer.NodeRenderer.RegisterFuncs.

     

       84
       +
       func (r *atHtmlRenderer) RegisterFuncs(reg renderer.NodeRendererFuncRegisterer) {

     

       85
       +
       	reg.Register(KindAt, r.renderAt)

     

       86
       +
       }

     

       87
       +
       

     

       88
       +
       func (r *atHtmlRenderer) renderAt(w util.BufWriter, source []byte, n ast.Node, entering bool) (ast.WalkStatus, error) {

     

       89
       +
       	if entering {

     

       90
       +
       		w.WriteString(`<a href="/@`)

     

       91
       +
       		w.WriteString(n.(*AtNode).handle)

     

       92
       +
       		w.WriteString(`" class="mention">`)

     

       93
       +
       	} else {

     

       94
       +
       		w.WriteString("</a>")

     

       95
       +
       	}

     

       96
       +
       	return ast.WalkContinue, nil

     

       97
       +
       }

     

       98
       +
       

     

       99
       +
       type atExt struct{}

     

       100
       +
       

     

       101
       +
       // At is an extension that allow you to use at expression like '@user.bsky.social' .

     

       102
       +
       var AtExt = &atExt{}

     

       103
       +
       

     

       104
       +
       func (e *atExt) Extend(m goldmark.Markdown) {

     

       105
       +
       	m.Parser().AddOptions(parser.WithInlineParsers(

     

       106
       +
       		util.Prioritized(NewAtParser(), 500),

     

       107
       +
       	))

     

       108
       +
       	m.Renderer().AddOptions(renderer.WithNodeRenderers(

     

       109
       +
       		util.Prioritized(NewAtHTMLRenderer(), 500),

     

       110
       +
       	))

     

       111
       +
       }

+8 -1

appview/pages/markup/markdown.go

···

       26
        
       

     

       27
        
       	"tangled.org/core/api/tangled"

     

       28
        
       	"tangled.org/core/appview/pages/repoinfo"

     

       0
        
       
     

       29
        
       )

     

       30
        
       

     

       31
        
       // RendererType defines the type of renderer to use based on context

     
···

       50
        
       	Files        fs.FS

     

       51
        
       }

     

       52
        
       

     

       53
       -
       func (rctx *RenderContext) RenderMarkdown(source string) string {

     

       54
        
       	md := goldmark.New(

     

       55
        
       		goldmark.WithExtensions(

     

       56
        
       			extension.GFM,

     
···

       66
        
       			),

     

       67
        
       			treeblood.MathML(),

     

       68
        
       			callout.CalloutExtention,

     

       0
        
       
     

       69
        
       		),

     

       70
        
       		goldmark.WithParserOptions(

     

       71
        
       			parser.WithAutoHeadingID(),

     

       72
        
       		),

     

       73
        
       		goldmark.WithRendererOptions(html.WithUnsafe()),

     

       74
        
       	)

     

       0
        
       
     

       0
        
       
     

       0
        
       
     

       0
        
       
     

       0
        
       
     

       75
        
       

     

       76
        
       	if rctx != nil {

     

       77
        
       		var transformers []util.PrioritizedValue

···

       26
        
       

     

       27
        
       	"tangled.org/core/api/tangled"

     

       28
        
       	"tangled.org/core/appview/pages/repoinfo"

     

       29
       +
       	textension "tangled.org/core/appview/pages/markup/extension"

     

       30
        
       )

     

       31
        
       

     

       32
        
       // RendererType defines the type of renderer to use based on context

     
···

       51
        
       	Files        fs.FS

     

       52
        
       }

     

       53
        
       

     

       54
       +
       func NewMarkdown() goldmark.Markdown {

     

       55
        
       	md := goldmark.New(

     

       56
        
       		goldmark.WithExtensions(

     

       57
        
       			extension.GFM,

     
···

       67
        
       			),

     

       68
        
       			treeblood.MathML(),

     

       69
        
       			callout.CalloutExtention,

     

       70
       +
       			textension.AtExt,

     

       71
        
       		),

     

       72
        
       		goldmark.WithParserOptions(

     

       73
        
       			parser.WithAutoHeadingID(),

     

       74
        
       		),

     

       75
        
       		goldmark.WithRendererOptions(html.WithUnsafe()),

     

       76
        
       	)

     

       77
       +
       	return md

     

       78
       +
       }

     

       79
       +
       

     

       80
       +
       func (rctx *RenderContext) RenderMarkdown(source string) string {

     

       81
       +
       	md := NewMarkdown()

     

       82
        
       

     

       83
        
       	if rctx != nil {

     

       84
        
       		var transformers []util.PrioritizedValue

appview/pages/markup/sanitizer.go

···

       77
        
       	policy.AllowAttrs("class").Matching(regexp.MustCompile(`heading`)).OnElements("h1", "h2", "h3", "h4", "h5", "h6", "h7", "h8")

     

       78
        
       	policy.AllowAttrs("class").Matching(regexp.MustCompile(strings.Join(slices.Collect(maps.Values(chroma.StandardTypes)), "|"))).OnElements("span")

     

       79
        
       

     

       0
        
       
     

       0
        
       
     

       0
        
       
     

       80
        
       	// centering content

     

       81
        
       	policy.AllowElements("center")

     

       82

···

       77
        
       	policy.AllowAttrs("class").Matching(regexp.MustCompile(`heading`)).OnElements("h1", "h2", "h3", "h4", "h5", "h6", "h7", "h8")

     

       78
        
       	policy.AllowAttrs("class").Matching(regexp.MustCompile(strings.Join(slices.Collect(maps.Values(chroma.StandardTypes)), "|"))).OnElements("span")

     

       79
        
       

     

       80
       +
       	// at-mentions

     

       81
       +
       	policy.AllowAttrs("class").Matching(regexp.MustCompile(`mention`)).OnElements("a")

     

       82
       +
       

     

       83
        
       	// centering content

     

       84
        
       	policy.AllowElements("center")

     

       85

input.css

···

       161
        
                   @apply no-underline;

     

       162
        
               }

     

       163
        
       

     

       0
        
       
     

       0
        
       
     

       0
        
       
     

       0
        
       
     

       164
        
               .prose li {

     

       165
        
                   @apply my-0 py-0;

     

       166
        
               }

···

       161
        
                   @apply no-underline;

     

       162
        
               }

     

       163
        
       

     

       164
       +
               .prose a.mention {

     

       165
       +
                   @apply no-underline hover:underline;

     

       166
       +
               }

     

       167
       +
       

     

       168
        
               .prose li {

     

       169
        
                   @apply my-0 py-0;

     

       170
        
               }