mirror of
https://codeberg.org/forgejo/forgejo.git
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88c2e24360
This PR adds mathematical rendering with KaTeX. The first step is to add a Goldmark extension that detects the latex (and tex) mathematics delimiters. The second step to make this extension only run if math support is enabled. The second step is to then add KaTeX CSS and JS to the head which will load after the dom is rendered. Fix #3445 Signed-off-by: Andrew Thornton <art27@cantab.net> Signed-off-by: Andrew Thornton <art27@cantab.net> Co-authored-by: silverwind <me@silverwind.io> Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
84 lines
2 KiB
Go
84 lines
2 KiB
Go
// Copyright 2022 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package markdown
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import (
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"github.com/yuin/goldmark/ast"
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east "github.com/yuin/goldmark/extension/ast"
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"gopkg.in/yaml.v3"
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)
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func nodeToTable(meta *yaml.Node) ast.Node {
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for {
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if meta == nil {
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return nil
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}
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switch meta.Kind {
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case yaml.DocumentNode:
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meta = meta.Content[0]
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continue
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default:
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}
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break
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}
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switch meta.Kind {
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case yaml.MappingNode:
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return mappingNodeToTable(meta)
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case yaml.SequenceNode:
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return sequenceNodeToTable(meta)
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default:
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return ast.NewString([]byte(meta.Value))
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}
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}
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func mappingNodeToTable(meta *yaml.Node) ast.Node {
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table := east.NewTable()
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alignments := []east.Alignment{}
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for i := 0; i < len(meta.Content); i += 2 {
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alignments = append(alignments, east.AlignNone)
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}
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headerRow := east.NewTableRow(alignments)
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valueRow := east.NewTableRow(alignments)
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for i := 0; i < len(meta.Content); i += 2 {
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cell := east.NewTableCell()
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cell.AppendChild(cell, nodeToTable(meta.Content[i]))
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headerRow.AppendChild(headerRow, cell)
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if i+1 < len(meta.Content) {
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cell = east.NewTableCell()
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cell.AppendChild(cell, nodeToTable(meta.Content[i+1]))
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valueRow.AppendChild(valueRow, cell)
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}
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}
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table.AppendChild(table, east.NewTableHeader(headerRow))
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table.AppendChild(table, valueRow)
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return table
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}
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func sequenceNodeToTable(meta *yaml.Node) ast.Node {
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table := east.NewTable()
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alignments := []east.Alignment{east.AlignNone}
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for _, item := range meta.Content {
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row := east.NewTableRow(alignments)
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cell := east.NewTableCell()
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cell.AppendChild(cell, nodeToTable(item))
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row.AppendChild(row, cell)
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table.AppendChild(table, row)
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}
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return table
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}
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func nodeToDetails(meta *yaml.Node, icon string) ast.Node {
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details := NewDetails()
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summary := NewSummary()
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summary.AppendChild(summary, NewIcon(icon))
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details.AppendChild(details, summary)
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details.AppendChild(details, nodeToTable(meta))
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return details
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}
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