hugo/markup/mmark/convert.go
Bjørn Erik Pedersen bfb9613a14
Add Goldmark as the new default markdown handler
This commit adds the fast and CommonMark compliant Goldmark as the new default markdown handler in Hugo.

If you want to continue using BlackFriday as the default for md/markdown extensions, you can use this configuration:

```toml
[markup]
defaultMarkdownHandler="blackfriday"
```

Fixes #5963
Fixes #1778
Fixes #6355
2019-11-23 14:12:24 +01:00

135 lines
4 KiB
Go

// Copyright 2019 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package mmark converts Markdown to HTML using MMark v1.
package mmark
import (
"github.com/gohugoio/hugo/markup/blackfriday/blackfriday_config"
"github.com/gohugoio/hugo/markup/converter"
"github.com/miekg/mmark"
)
// Provider is the package entry point.
var Provider converter.ProviderProvider = provider{}
type provider struct {
}
func (p provider) New(cfg converter.ProviderConfig) (converter.Provider, error) {
defaultBlackFriday := cfg.MarkupConfig.BlackFriday
defaultExtensions := getMmarkExtensions(defaultBlackFriday)
return converter.NewProvider("mmark", func(ctx converter.DocumentContext) (converter.Converter, error) {
b := defaultBlackFriday
extensions := defaultExtensions
if ctx.ConfigOverrides != nil {
var err error
b, err = blackfriday_config.UpdateConfig(b, ctx.ConfigOverrides)
if err != nil {
return nil, err
}
extensions = getMmarkExtensions(b)
}
return &mmarkConverter{
ctx: ctx,
b: b,
extensions: extensions,
cfg: cfg,
}, nil
}), nil
}
type mmarkConverter struct {
ctx converter.DocumentContext
extensions int
b blackfriday_config.Config
cfg converter.ProviderConfig
}
func (c *mmarkConverter) Convert(ctx converter.RenderContext) (converter.Result, error) {
r := getHTMLRenderer(c.ctx, c.b, c.cfg)
return mmark.Parse(ctx.Src, r, c.extensions), nil
}
func getHTMLRenderer(
ctx converter.DocumentContext,
cfg blackfriday_config.Config,
pcfg converter.ProviderConfig) mmark.Renderer {
var (
flags int
documentID string
)
documentID = ctx.DocumentID
renderParameters := mmark.HtmlRendererParameters{
FootnoteAnchorPrefix: cfg.FootnoteAnchorPrefix,
FootnoteReturnLinkContents: cfg.FootnoteReturnLinkContents,
}
if documentID != "" && !cfg.PlainIDAnchors {
renderParameters.FootnoteAnchorPrefix = documentID + ":" + renderParameters.FootnoteAnchorPrefix
}
htmlFlags := flags
htmlFlags |= mmark.HTML_FOOTNOTE_RETURN_LINKS
return &mmarkRenderer{
BlackfridayConfig: cfg,
Config: pcfg,
Renderer: mmark.HtmlRendererWithParameters(htmlFlags, "", "", renderParameters),
}
}
func getMmarkExtensions(cfg blackfriday_config.Config) int {
flags := 0
flags |= mmark.EXTENSION_TABLES
flags |= mmark.EXTENSION_FENCED_CODE
flags |= mmark.EXTENSION_AUTOLINK
flags |= mmark.EXTENSION_SPACE_HEADERS
flags |= mmark.EXTENSION_CITATION
flags |= mmark.EXTENSION_TITLEBLOCK_TOML
flags |= mmark.EXTENSION_HEADER_IDS
flags |= mmark.EXTENSION_AUTO_HEADER_IDS
flags |= mmark.EXTENSION_UNIQUE_HEADER_IDS
flags |= mmark.EXTENSION_FOOTNOTES
flags |= mmark.EXTENSION_SHORT_REF
flags |= mmark.EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK
flags |= mmark.EXTENSION_INCLUDE
for _, extension := range cfg.Extensions {
if flag, ok := mmarkExtensionMap[extension]; ok {
flags |= flag
}
}
return flags
}
var mmarkExtensionMap = map[string]int{
"tables": mmark.EXTENSION_TABLES,
"fencedCode": mmark.EXTENSION_FENCED_CODE,
"autolink": mmark.EXTENSION_AUTOLINK,
"laxHtmlBlocks": mmark.EXTENSION_LAX_HTML_BLOCKS,
"spaceHeaders": mmark.EXTENSION_SPACE_HEADERS,
"hardLineBreak": mmark.EXTENSION_HARD_LINE_BREAK,
"footnotes": mmark.EXTENSION_FOOTNOTES,
"noEmptyLineBeforeBlock": mmark.EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK,
"headerIds": mmark.EXTENSION_HEADER_IDS,
"autoHeaderIds": mmark.EXTENSION_AUTO_HEADER_IDS,
}