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forgejo/modules/markup/markdown/math/inline_node.go
zeripath 88c2e24360
Add KaTeX rendering to Markdown. (#20571)
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>
2022-09-14 00:33:37 +08:00

49 lines
1.1 KiB
Go

// Copyright 2022 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package math
import (
"github.com/yuin/goldmark/ast"
"github.com/yuin/goldmark/util"
)
// Inline represents inline math e.g. $...$ or \(...\)
type Inline struct {
ast.BaseInline
}
// Inline implements Inline.Inline.
func (n *Inline) Inline() {}
// IsBlank returns if this inline node is empty
func (n *Inline) IsBlank(source []byte) bool {
for c := n.FirstChild(); c != nil; c = c.NextSibling() {
text := c.(*ast.Text).Segment
if !util.IsBlank(text.Value(source)) {
return false
}
}
return true
}
// Dump renders this inline math as debug
func (n *Inline) Dump(source []byte, level int) {
ast.DumpHelper(n, source, level, nil, nil)
}
// KindInline is the kind for math inline
var KindInline = ast.NewNodeKind("MathInline")
// Kind returns KindInline
func (n *Inline) Kind() ast.NodeKind {
return KindInline
}
// NewInline creates a new ast math inline node
func NewInline() *Inline {
return &Inline{
BaseInline: ast.BaseInline{},
}
}