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// Copyright 2022 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package math
import (
"code.gitea.io/gitea/modules/markup/internal"
giteaUtil "code.gitea.io/gitea/modules/util"
"github.com/yuin/goldmark"
"github.com/yuin/goldmark/parser"
"github.com/yuin/goldmark/renderer"
"github.com/yuin/goldmark/util"
)
type Options struct {
Enabled bool
ParseInlineDollar bool // inline $$ xxx $$ text
ParseInlineParentheses bool // inline \( xxx \) text
ParseBlockDollar bool // block $$ multiple-line $$ text
ParseBlockSquareBrackets bool // block \[ multiple-line \] text
}
// Extension is a math extension
type Extension struct {
renderInternal *internal.RenderInternal
options Options
}
// NewExtension creates a new math extension with the provided options
func NewExtension(renderInternal *internal.RenderInternal, opts ...Options) *Extension {
opt := giteaUtil.OptionalArg(opts)
r := &Extension{
renderInternal: renderInternal,
options: opt,
}
return r
}
// Extend extends goldmark with our parsers and renderers
func (e *Extension) Extend(m goldmark.Markdown) {
if !e.options.Enabled {
return
}
var inlines []util.PrioritizedValue
if e.options.ParseInlineParentheses {
inlines = append(inlines, util.Prioritized(NewInlineParenthesesParser(), 501))
}
inlines = append(inlines, util.Prioritized(NewInlineDollarParser(e.options.ParseInlineDollar), 502))
m.Parser().AddOptions(parser.WithInlineParsers(inlines...))
m.Parser().AddOptions(parser.WithBlockParsers(
util.Prioritized(NewBlockParser(e.options.ParseBlockDollar, e.options.ParseBlockSquareBrackets), 701),
))
m.Renderer().AddOptions(renderer.WithNodeRenderers(
util.Prioritized(NewBlockRenderer(e.renderInternal), 501),
util.Prioritized(NewInlineRenderer(e.renderInternal), 502),
))
}
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