mirror of
https://github.com/go-gitea/gitea.git
synced 2024-08-22 21:14:18 -04:00
* Add a markdown stripper for mentions and xrefs * Improve comments * Small code simplification * Move reference code to modules/references * Fix typo * Make MarkdownStripper return [][]byte * Implement preliminary keywords parsing * Add FIXME comment * Fix comment * make fmt * Fix permissions check * Fix text assumptions * Fix imports * Fix lint, fmt * Fix unused import * Add missing export comment * Bypass revive on implemented interface * Move mdstripper into its own package * Support alphanumeric patterns * Refactor FindAllMentions * Move mentions test to references * Parse mentions from reference package * Refactor code to implement renderizable references * Fix typo * Move patterns and tests to the references package * Fix nil reference * Preliminary rendering attempt of closing keywords * Normalize names, comments, general tidy-up * Add CSS style for action keywords * Fix permission for admin and owner * Fix golangci-lint * Fix golangci-lint
261 lines
7.6 KiB
Go
261 lines
7.6 KiB
Go
// Copyright 2019 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 mdstripper
|
|
|
|
import (
|
|
"bytes"
|
|
|
|
"github.com/russross/blackfriday"
|
|
)
|
|
|
|
// MarkdownStripper extends blackfriday.Renderer
|
|
type MarkdownStripper struct {
|
|
blackfriday.Renderer
|
|
links []string
|
|
coallesce bool
|
|
}
|
|
|
|
const (
|
|
blackfridayExtensions = 0 |
|
|
blackfriday.EXTENSION_NO_INTRA_EMPHASIS |
|
|
blackfriday.EXTENSION_TABLES |
|
|
blackfriday.EXTENSION_FENCED_CODE |
|
|
blackfriday.EXTENSION_STRIKETHROUGH |
|
|
blackfriday.EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK |
|
|
blackfriday.EXTENSION_DEFINITION_LISTS |
|
|
blackfriday.EXTENSION_FOOTNOTES |
|
|
blackfriday.EXTENSION_HEADER_IDS |
|
|
blackfriday.EXTENSION_AUTO_HEADER_IDS |
|
|
// Not included in modules/markup/markdown/markdown.go;
|
|
// required here to process inline links
|
|
blackfriday.EXTENSION_AUTOLINK
|
|
)
|
|
|
|
//revive:disable:var-naming Implementing the Rendering interface requires breaking some linting rules
|
|
|
|
// StripMarkdown parses markdown content by removing all markup and code blocks
|
|
// in order to extract links and other references
|
|
func StripMarkdown(rawBytes []byte) (string, []string) {
|
|
stripper := &MarkdownStripper{
|
|
links: make([]string, 0, 10),
|
|
}
|
|
body := blackfriday.Markdown(rawBytes, stripper, blackfridayExtensions)
|
|
return string(body), stripper.GetLinks()
|
|
}
|
|
|
|
// StripMarkdownBytes parses markdown content by removing all markup and code blocks
|
|
// in order to extract links and other references
|
|
func StripMarkdownBytes(rawBytes []byte) ([]byte, []string) {
|
|
stripper := &MarkdownStripper{
|
|
links: make([]string, 0, 10),
|
|
}
|
|
body := blackfriday.Markdown(rawBytes, stripper, blackfridayExtensions)
|
|
return body, stripper.GetLinks()
|
|
}
|
|
|
|
// block-level callbacks
|
|
|
|
// BlockCode dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) BlockCode(out *bytes.Buffer, text []byte, infoString string) {
|
|
// Not rendered
|
|
r.coallesce = false
|
|
}
|
|
|
|
// BlockQuote dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) BlockQuote(out *bytes.Buffer, text []byte) {
|
|
// FIXME: perhaps it's better to leave out block quote for this?
|
|
r.processString(out, text, false)
|
|
}
|
|
|
|
// BlockHtml dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) BlockHtml(out *bytes.Buffer, text []byte) { //nolint
|
|
// Not rendered
|
|
r.coallesce = false
|
|
}
|
|
|
|
// Header dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) Header(out *bytes.Buffer, text func() bool, level int, id string) {
|
|
text()
|
|
r.coallesce = false
|
|
}
|
|
|
|
// HRule dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) HRule(out *bytes.Buffer) {
|
|
// Not rendered
|
|
r.coallesce = false
|
|
}
|
|
|
|
// List dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) List(out *bytes.Buffer, text func() bool, flags int) {
|
|
text()
|
|
r.coallesce = false
|
|
}
|
|
|
|
// ListItem dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) ListItem(out *bytes.Buffer, text []byte, flags int) {
|
|
r.processString(out, text, false)
|
|
}
|
|
|
|
// Paragraph dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) Paragraph(out *bytes.Buffer, text func() bool) {
|
|
text()
|
|
r.coallesce = false
|
|
}
|
|
|
|
// Table dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) Table(out *bytes.Buffer, header []byte, body []byte, columnData []int) {
|
|
r.processString(out, header, false)
|
|
r.processString(out, body, false)
|
|
}
|
|
|
|
// TableRow dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) TableRow(out *bytes.Buffer, text []byte) {
|
|
r.processString(out, text, false)
|
|
}
|
|
|
|
// TableHeaderCell dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) TableHeaderCell(out *bytes.Buffer, text []byte, flags int) {
|
|
r.processString(out, text, false)
|
|
}
|
|
|
|
// TableCell dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) TableCell(out *bytes.Buffer, text []byte, flags int) {
|
|
r.processString(out, text, false)
|
|
}
|
|
|
|
// Footnotes dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) Footnotes(out *bytes.Buffer, text func() bool) {
|
|
text()
|
|
}
|
|
|
|
// FootnoteItem dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) FootnoteItem(out *bytes.Buffer, name, text []byte, flags int) {
|
|
r.processString(out, text, false)
|
|
}
|
|
|
|
// TitleBlock dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) TitleBlock(out *bytes.Buffer, text []byte) {
|
|
r.processString(out, text, false)
|
|
}
|
|
|
|
// Span-level callbacks
|
|
|
|
// AutoLink dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) AutoLink(out *bytes.Buffer, link []byte, kind int) {
|
|
r.processLink(out, link, []byte{})
|
|
}
|
|
|
|
// CodeSpan dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) CodeSpan(out *bytes.Buffer, text []byte) {
|
|
// Not rendered
|
|
r.coallesce = false
|
|
}
|
|
|
|
// DoubleEmphasis dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) DoubleEmphasis(out *bytes.Buffer, text []byte) {
|
|
r.processString(out, text, false)
|
|
}
|
|
|
|
// Emphasis dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) Emphasis(out *bytes.Buffer, text []byte) {
|
|
r.processString(out, text, false)
|
|
}
|
|
|
|
// Image dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) Image(out *bytes.Buffer, link []byte, title []byte, alt []byte) {
|
|
// Not rendered
|
|
r.coallesce = false
|
|
}
|
|
|
|
// LineBreak dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) LineBreak(out *bytes.Buffer) {
|
|
// Not rendered
|
|
r.coallesce = false
|
|
}
|
|
|
|
// Link dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) Link(out *bytes.Buffer, link []byte, title []byte, content []byte) {
|
|
r.processLink(out, link, content)
|
|
}
|
|
|
|
// RawHtmlTag dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) RawHtmlTag(out *bytes.Buffer, tag []byte) { //nolint
|
|
// Not rendered
|
|
r.coallesce = false
|
|
}
|
|
|
|
// TripleEmphasis dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) TripleEmphasis(out *bytes.Buffer, text []byte) {
|
|
r.processString(out, text, false)
|
|
}
|
|
|
|
// StrikeThrough dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) StrikeThrough(out *bytes.Buffer, text []byte) {
|
|
r.processString(out, text, false)
|
|
}
|
|
|
|
// FootnoteRef dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) FootnoteRef(out *bytes.Buffer, ref []byte, id int) {
|
|
// Not rendered
|
|
r.coallesce = false
|
|
}
|
|
|
|
// Low-level callbacks
|
|
|
|
// Entity dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) Entity(out *bytes.Buffer, entity []byte) {
|
|
// FIXME: literal entities are not parsed; perhaps they should
|
|
r.coallesce = false
|
|
}
|
|
|
|
// NormalText dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) NormalText(out *bytes.Buffer, text []byte) {
|
|
r.processString(out, text, true)
|
|
}
|
|
|
|
// Header and footer
|
|
|
|
// DocumentHeader dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) DocumentHeader(out *bytes.Buffer) {
|
|
r.coallesce = false
|
|
}
|
|
|
|
// DocumentFooter dummy function to proceed with rendering
|
|
func (r *MarkdownStripper) DocumentFooter(out *bytes.Buffer) {
|
|
r.coallesce = false
|
|
}
|
|
|
|
// GetFlags returns rendering flags
|
|
func (r *MarkdownStripper) GetFlags() int {
|
|
return 0
|
|
}
|
|
|
|
//revive:enable:var-naming
|
|
|
|
func doubleSpace(out *bytes.Buffer) {
|
|
if out.Len() > 0 {
|
|
out.WriteByte('\n')
|
|
}
|
|
}
|
|
|
|
func (r *MarkdownStripper) processString(out *bytes.Buffer, text []byte, coallesce bool) {
|
|
// Always break-up words
|
|
if !coallesce || !r.coallesce {
|
|
doubleSpace(out)
|
|
}
|
|
out.Write(text)
|
|
r.coallesce = coallesce
|
|
}
|
|
func (r *MarkdownStripper) processLink(out *bytes.Buffer, link []byte, content []byte) {
|
|
// Links are processed out of band
|
|
r.links = append(r.links, string(link))
|
|
r.coallesce = false
|
|
}
|
|
|
|
// GetLinks returns the list of link data collected while parsing
|
|
func (r *MarkdownStripper) GetLinks() []string {
|
|
return r.links
|
|
}
|