27757714d0
* Move to goldmark Markdown rendering moved from blackfriday to the goldmark. Multiple subtle changes required to the goldmark extensions to keep current rendering and defaults. Can go further with goldmark linkify and have this work within markdown rendering making the link processor unnecessary. Need to think about how to go about allowing extensions - at present it seems that these would be hard to do without recompilation. * linter fixes Co-authored-by: Lauris BH <lauris@nix.lv>
135 lines
3.8 KiB
Go
135 lines
3.8 KiB
Go
// Copyright 2014 The Gogs Authors. All rights reserved.
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// Copyright 2018 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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"bytes"
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"sync"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/markup"
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"code.gitea.io/gitea/modules/markup/common"
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"code.gitea.io/gitea/modules/setting"
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giteautil "code.gitea.io/gitea/modules/util"
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"github.com/yuin/goldmark"
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"github.com/yuin/goldmark/extension"
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"github.com/yuin/goldmark/parser"
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"github.com/yuin/goldmark/renderer"
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"github.com/yuin/goldmark/renderer/html"
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"github.com/yuin/goldmark/util"
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)
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var converter goldmark.Markdown
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var once = sync.Once{}
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var urlPrefixKey = parser.NewContextKey()
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var isWikiKey = parser.NewContextKey()
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// NewGiteaParseContext creates a parser.Context with the gitea context set
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func NewGiteaParseContext(urlPrefix string, isWiki bool) parser.Context {
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pc := parser.NewContext(parser.WithIDs(newPrefixedIDs()))
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pc.Set(urlPrefixKey, urlPrefix)
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pc.Set(isWikiKey, isWiki)
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return pc
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}
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// RenderRaw renders Markdown to HTML without handling special links.
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func RenderRaw(body []byte, urlPrefix string, wikiMarkdown bool) []byte {
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once.Do(func() {
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converter = goldmark.New(
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goldmark.WithExtensions(extension.Table,
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extension.Strikethrough,
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extension.TaskList,
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extension.DefinitionList,
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common.FootnoteExtension,
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extension.NewTypographer(
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extension.WithTypographicSubstitutions(extension.TypographicSubstitutions{
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extension.EnDash: nil,
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extension.EmDash: nil,
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}),
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),
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),
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goldmark.WithParserOptions(
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parser.WithAttribute(),
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parser.WithAutoHeadingID(),
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parser.WithASTTransformers(
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util.Prioritized(&GiteaASTTransformer{}, 10000),
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),
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),
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goldmark.WithRendererOptions(
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html.WithUnsafe(),
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),
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)
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// Override the original Tasklist renderer!
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converter.Renderer().AddOptions(
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renderer.WithNodeRenderers(
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util.Prioritized(NewTaskCheckBoxHTMLRenderer(), 1000),
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),
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)
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if setting.Markdown.EnableHardLineBreak {
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converter.Renderer().AddOptions(html.WithHardWraps())
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}
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})
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pc := NewGiteaParseContext(urlPrefix, wikiMarkdown)
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var buf bytes.Buffer
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if err := converter.Convert(giteautil.NormalizeEOL(body), &buf, parser.WithContext(pc)); err != nil {
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log.Error("Unable to render: %v", err)
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}
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return markup.SanitizeReader(&buf).Bytes()
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}
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var (
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// MarkupName describes markup's name
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MarkupName = "markdown"
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)
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func init() {
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markup.RegisterParser(Parser{})
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}
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// Parser implements markup.Parser
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type Parser struct{}
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// Name implements markup.Parser
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func (Parser) Name() string {
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return MarkupName
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}
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// Extensions implements markup.Parser
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func (Parser) Extensions() []string {
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return setting.Markdown.FileExtensions
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}
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// Render implements markup.Parser
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func (Parser) Render(rawBytes []byte, urlPrefix string, metas map[string]string, isWiki bool) []byte {
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return RenderRaw(rawBytes, urlPrefix, isWiki)
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}
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// Render renders Markdown to HTML with all specific handling stuff.
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func Render(rawBytes []byte, urlPrefix string, metas map[string]string) []byte {
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return markup.Render("a.md", rawBytes, urlPrefix, metas)
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}
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// RenderString renders Markdown to HTML with special links and returns string type.
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func RenderString(raw, urlPrefix string, metas map[string]string) string {
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return markup.RenderString("a.md", raw, urlPrefix, metas)
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}
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// RenderWiki renders markdown wiki page to HTML and return HTML string
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func RenderWiki(rawBytes []byte, urlPrefix string, metas map[string]string) string {
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return markup.RenderWiki("a.md", rawBytes, urlPrefix, metas)
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}
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// IsMarkdownFile reports whether name looks like a Markdown file
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// based on its extension.
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func IsMarkdownFile(name string) bool {
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return markup.IsMarkupFile(name, MarkupName)
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}
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