forked from forgejo/forgejo
Change markdown rendering from blackfriday to goldmark (#9533)
* 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>
This commit is contained in:
zeripath
Lauris BH
parent
0c07f1de5b
commit
27757714d0
83 changed files with 13838 additions and 6297 deletions
539
vendor/github.com/yuin/goldmark/text/reader.go
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vendored
Normal file
539
vendor/github.com/yuin/goldmark/text/reader.go
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vendored
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@ -0,0 +1,539 @@
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package text
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import (
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"io"
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"regexp"
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"unicode/utf8"
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"github.com/yuin/goldmark/util"
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)
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const invalidValue = -1
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// EOF indicates the end of file.
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const EOF = byte(0xff)
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// A Reader interface provides abstracted method for reading text.
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type Reader interface {
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io.RuneReader
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// Source returns a source of the reader.
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Source() []byte
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// ResetPosition resets positions.
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ResetPosition()
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// Peek returns a byte at current position without advancing the internal pointer.
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Peek() byte
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// PeekLine returns the current line without advancing the internal pointer.
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PeekLine() ([]byte, Segment)
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// PrecendingCharacter returns a character just before current internal pointer.
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PrecendingCharacter() rune
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// Value returns a value of the given segment.
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Value(Segment) []byte
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// LineOffset returns a distance from the line head to current position.
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LineOffset() int
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// Position returns current line number and position.
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Position() (int, Segment)
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// SetPosition sets current line number and position.
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SetPosition(int, Segment)
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// SetPadding sets padding to the reader.
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SetPadding(int)
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// Advance advances the internal pointer.
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Advance(int)
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// AdvanceAndSetPadding advances the internal pointer and add padding to the
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// reader.
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AdvanceAndSetPadding(int, int)
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// AdvanceLine advances the internal pointer to the next line head.
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AdvanceLine()
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// SkipSpaces skips space characters and returns a non-blank line.
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// If it reaches EOF, returns false.
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SkipSpaces() (Segment, int, bool)
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// SkipSpaces skips blank lines and returns a non-blank line.
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// If it reaches EOF, returns false.
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SkipBlankLines() (Segment, int, bool)
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// Match performs regular expression matching to current line.
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Match(reg *regexp.Regexp) bool
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// Match performs regular expression searching to current line.
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FindSubMatch(reg *regexp.Regexp) [][]byte
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}
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type reader struct {
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source []byte
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sourceLength int
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line int
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peekedLine []byte
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pos Segment
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head int
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lineOffset int
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}
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// NewReader return a new Reader that can read UTF-8 bytes .
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func NewReader(source []byte) Reader {
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r := &reader{
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source: source,
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sourceLength: len(source),
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}
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r.ResetPosition()
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return r
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}
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func (r *reader) ResetPosition() {
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r.line = -1
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r.head = 0
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r.lineOffset = -1
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r.AdvanceLine()
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}
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func (r *reader) Source() []byte {
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return r.source
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}
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func (r *reader) Value(seg Segment) []byte {
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return seg.Value(r.source)
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}
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func (r *reader) Peek() byte {
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if r.pos.Start >= 0 && r.pos.Start < r.sourceLength {
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if r.pos.Padding != 0 {
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return space[0]
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}
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return r.source[r.pos.Start]
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}
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return EOF
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}
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func (r *reader) PeekLine() ([]byte, Segment) {
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if r.pos.Start >= 0 && r.pos.Start < r.sourceLength {
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if r.peekedLine == nil {
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r.peekedLine = r.pos.Value(r.Source())
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}
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return r.peekedLine, r.pos
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}
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return nil, r.pos
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}
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// io.RuneReader interface
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func (r *reader) ReadRune() (rune, int, error) {
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return readRuneReader(r)
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}
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func (r *reader) LineOffset() int {
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if r.lineOffset < 0 {
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v := 0
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for i := r.head; i < r.pos.Start; i++ {
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if r.source[i] == '\t' {
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v += util.TabWidth(v)
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} else {
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v++
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}
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}
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r.lineOffset = v - r.pos.Padding
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}
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return r.lineOffset
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}
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func (r *reader) PrecendingCharacter() rune {
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if r.pos.Start <= 0 {
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if r.pos.Padding != 0 {
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return rune(' ')
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}
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return rune('\n')
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}
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i := r.pos.Start - 1
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for ; i >= 0; i-- {
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if utf8.RuneStart(r.source[i]) {
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break
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}
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}
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rn, _ := utf8.DecodeRune(r.source[i:])
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return rn
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}
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func (r *reader) Advance(n int) {
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r.lineOffset = -1
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if n < len(r.peekedLine) && r.pos.Padding == 0 {
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r.pos.Start += n
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r.peekedLine = nil
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return
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}
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r.peekedLine = nil
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l := r.sourceLength
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for ; n > 0 && r.pos.Start < l; n-- {
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if r.pos.Padding != 0 {
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r.pos.Padding--
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continue
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}
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if r.source[r.pos.Start] == '\n' {
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r.AdvanceLine()
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continue
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}
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r.pos.Start++
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}
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}
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func (r *reader) AdvanceAndSetPadding(n, padding int) {
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r.Advance(n)
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if padding > r.pos.Padding {
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r.SetPadding(padding)
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}
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}
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func (r *reader) AdvanceLine() {
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r.lineOffset = -1
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r.peekedLine = nil
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r.pos.Start = r.pos.Stop
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r.head = r.pos.Start
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if r.pos.Start < 0 {
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return
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}
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r.pos.Stop = r.sourceLength
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for i := r.pos.Start; i < r.sourceLength; i++ {
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c := r.source[i]
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if c == '\n' {
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r.pos.Stop = i + 1
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break
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}
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}
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r.line++
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r.pos.Padding = 0
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}
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func (r *reader) Position() (int, Segment) {
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return r.line, r.pos
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}
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func (r *reader) SetPosition(line int, pos Segment) {
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r.lineOffset = -1
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r.line = line
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r.pos = pos
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}
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func (r *reader) SetPadding(v int) {
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r.pos.Padding = v
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}
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func (r *reader) SkipSpaces() (Segment, int, bool) {
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return skipSpacesReader(r)
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}
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func (r *reader) SkipBlankLines() (Segment, int, bool) {
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return skipBlankLinesReader(r)
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}
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func (r *reader) Match(reg *regexp.Regexp) bool {
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return matchReader(r, reg)
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}
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func (r *reader) FindSubMatch(reg *regexp.Regexp) [][]byte {
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return findSubMatchReader(r, reg)
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}
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// A BlockReader interface is a reader that is optimized for Blocks.
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type BlockReader interface {
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Reader
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// Reset resets current state and sets new segments to the reader.
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Reset(segment *Segments)
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}
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type blockReader struct {
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source []byte
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segments *Segments
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segmentsLength int
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line int
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pos Segment
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head int
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last int
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lineOffset int
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}
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// NewBlockReader returns a new BlockReader.
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func NewBlockReader(source []byte, segments *Segments) BlockReader {
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r := &blockReader{
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source: source,
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}
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if segments != nil {
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r.Reset(segments)
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}
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return r
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}
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func (r *blockReader) ResetPosition() {
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r.line = -1
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r.head = 0
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r.last = 0
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r.lineOffset = -1
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r.pos.Start = -1
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r.pos.Stop = -1
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r.pos.Padding = 0
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if r.segmentsLength > 0 {
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last := r.segments.At(r.segmentsLength - 1)
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r.last = last.Stop
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}
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r.AdvanceLine()
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}
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func (r *blockReader) Reset(segments *Segments) {
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r.segments = segments
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r.segmentsLength = segments.Len()
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r.ResetPosition()
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}
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func (r *blockReader) Source() []byte {
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return r.source
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}
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func (r *blockReader) Value(seg Segment) []byte {
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line := r.segmentsLength - 1
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ret := make([]byte, 0, seg.Stop-seg.Start+1)
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for ; line >= 0; line-- {
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if seg.Start >= r.segments.At(line).Start {
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break
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}
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}
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i := seg.Start
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for ; line < r.segmentsLength; line++ {
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s := r.segments.At(line)
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if i < 0 {
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i = s.Start
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}
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ret = s.ConcatPadding(ret)
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for ; i < seg.Stop && i < s.Stop; i++ {
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ret = append(ret, r.source[i])
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}
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i = -1
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if s.Stop > seg.Stop {
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break
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}
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}
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return ret
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}
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// io.RuneReader interface
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func (r *blockReader) ReadRune() (rune, int, error) {
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return readRuneReader(r)
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}
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func (r *blockReader) PrecendingCharacter() rune {
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if r.pos.Padding != 0 {
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return rune(' ')
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}
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if r.pos.Start <= 0 {
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return rune('\n')
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}
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l := len(r.source)
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i := r.pos.Start - 1
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for ; i < l && i >= 0; i-- {
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if utf8.RuneStart(r.source[i]) {
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break
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}
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}
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if i < 0 || i >= l {
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return rune('\n')
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}
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rn, _ := utf8.DecodeRune(r.source[i:])
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return rn
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}
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func (r *blockReader) LineOffset() int {
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if r.lineOffset < 0 {
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v := 0
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for i := r.head; i < r.pos.Start; i++ {
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if r.source[i] == '\t' {
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v += util.TabWidth(v)
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} else {
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v++
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}
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}
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r.lineOffset = v - r.pos.Padding
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}
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return r.lineOffset
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}
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func (r *blockReader) Peek() byte {
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if r.line < r.segmentsLength && r.pos.Start >= 0 && r.pos.Start < r.last {
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if r.pos.Padding != 0 {
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return space[0]
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}
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return r.source[r.pos.Start]
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}
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return EOF
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}
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func (r *blockReader) PeekLine() ([]byte, Segment) {
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if r.line < r.segmentsLength && r.pos.Start >= 0 && r.pos.Start < r.last {
|
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return r.pos.Value(r.source), r.pos
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}
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return nil, r.pos
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}
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func (r *blockReader) Advance(n int) {
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r.lineOffset = -1
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if n < r.pos.Stop-r.pos.Start && r.pos.Padding == 0 {
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r.pos.Start += n
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return
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}
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|
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for ; n > 0; n-- {
|
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if r.pos.Padding != 0 {
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r.pos.Padding--
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continue
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}
|
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if r.pos.Start >= r.pos.Stop-1 && r.pos.Stop < r.last {
|
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r.AdvanceLine()
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continue
|
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}
|
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r.pos.Start++
|
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}
|
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}
|
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|
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func (r *blockReader) AdvanceAndSetPadding(n, padding int) {
|
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r.Advance(n)
|
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if padding > r.pos.Padding {
|
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r.SetPadding(padding)
|
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}
|
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}
|
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|
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func (r *blockReader) AdvanceLine() {
|
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r.SetPosition(r.line+1, NewSegment(invalidValue, invalidValue))
|
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r.head = r.pos.Start
|
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}
|
||||
|
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func (r *blockReader) Position() (int, Segment) {
|
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return r.line, r.pos
|
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}
|
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|
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func (r *blockReader) SetPosition(line int, pos Segment) {
|
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r.lineOffset = -1
|
||||
r.line = line
|
||||
if pos.Start == invalidValue {
|
||||
if r.line < r.segmentsLength {
|
||||
s := r.segments.At(line)
|
||||
r.head = s.Start
|
||||
r.pos = s
|
||||
}
|
||||
} else {
|
||||
r.pos = pos
|
||||
if r.line < r.segmentsLength {
|
||||
s := r.segments.At(line)
|
||||
r.head = s.Start
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (r *blockReader) SetPadding(v int) {
|
||||
r.lineOffset = -1
|
||||
r.pos.Padding = v
|
||||
}
|
||||
|
||||
func (r *blockReader) SkipSpaces() (Segment, int, bool) {
|
||||
return skipSpacesReader(r)
|
||||
}
|
||||
|
||||
func (r *blockReader) SkipBlankLines() (Segment, int, bool) {
|
||||
return skipBlankLinesReader(r)
|
||||
}
|
||||
|
||||
func (r *blockReader) Match(reg *regexp.Regexp) bool {
|
||||
return matchReader(r, reg)
|
||||
}
|
||||
|
||||
func (r *blockReader) FindSubMatch(reg *regexp.Regexp) [][]byte {
|
||||
return findSubMatchReader(r, reg)
|
||||
}
|
||||
|
||||
func skipBlankLinesReader(r Reader) (Segment, int, bool) {
|
||||
lines := 0
|
||||
for {
|
||||
line, seg := r.PeekLine()
|
||||
if line == nil {
|
||||
return seg, lines, false
|
||||
}
|
||||
if util.IsBlank(line) {
|
||||
lines++
|
||||
r.AdvanceLine()
|
||||
} else {
|
||||
return seg, lines, true
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func skipSpacesReader(r Reader) (Segment, int, bool) {
|
||||
chars := 0
|
||||
for {
|
||||
line, segment := r.PeekLine()
|
||||
if line == nil {
|
||||
return segment, chars, false
|
||||
}
|
||||
for i, c := range line {
|
||||
if util.IsSpace(c) {
|
||||
chars++
|
||||
r.Advance(1)
|
||||
continue
|
||||
}
|
||||
return segment.WithStart(segment.Start + i + 1), chars, true
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func matchReader(r Reader, reg *regexp.Regexp) bool {
|
||||
oldline, oldseg := r.Position()
|
||||
match := reg.FindReaderSubmatchIndex(r)
|
||||
r.SetPosition(oldline, oldseg)
|
||||
if match == nil {
|
||||
return false
|
||||
}
|
||||
r.Advance(match[1] - match[0])
|
||||
return true
|
||||
}
|
||||
|
||||
func findSubMatchReader(r Reader, reg *regexp.Regexp) [][]byte {
|
||||
oldline, oldseg := r.Position()
|
||||
match := reg.FindReaderSubmatchIndex(r)
|
||||
r.SetPosition(oldline, oldseg)
|
||||
if match == nil {
|
||||
return nil
|
||||
}
|
||||
runes := make([]rune, 0, match[1]-match[0])
|
||||
for i := 0; i < match[1]; {
|
||||
r, size, _ := readRuneReader(r)
|
||||
i += size
|
||||
runes = append(runes, r)
|
||||
}
|
||||
result := [][]byte{}
|
||||
for i := 0; i < len(match); i += 2 {
|
||||
result = append(result, []byte(string(runes[match[i]:match[i+1]])))
|
||||
}
|
||||
|
||||
r.SetPosition(oldline, oldseg)
|
||||
r.Advance(match[1] - match[0])
|
||||
return result
|
||||
}
|
||||
|
||||
func readRuneReader(r Reader) (rune, int, error) {
|
||||
line, _ := r.PeekLine()
|
||||
if line == nil {
|
||||
return 0, 0, io.EOF
|
||||
}
|
||||
rn, size := utf8.DecodeRune(line)
|
||||
if rn == utf8.RuneError {
|
||||
return 0, 0, io.EOF
|
||||
}
|
||||
r.Advance(size)
|
||||
return rn, size, nil
|
||||
}
|
||||
209
vendor/github.com/yuin/goldmark/text/segment.go
generated
vendored
Normal file
209
vendor/github.com/yuin/goldmark/text/segment.go
generated
vendored
Normal file
|
|
@ -0,0 +1,209 @@
|
|||
package text
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"github.com/yuin/goldmark/util"
|
||||
)
|
||||
|
||||
var space = []byte(" ")
|
||||
|
||||
// A Segment struct holds information about source potisions.
|
||||
type Segment struct {
|
||||
// Start is a start position of the segment.
|
||||
Start int
|
||||
|
||||
// Stop is a stop position of the segment.
|
||||
// This value should be excluded.
|
||||
Stop int
|
||||
|
||||
// Padding is a padding length of the segment.
|
||||
Padding int
|
||||
}
|
||||
|
||||
// NewSegment return a new Segment.
|
||||
func NewSegment(start, stop int) Segment {
|
||||
return Segment{
|
||||
Start: start,
|
||||
Stop: stop,
|
||||
Padding: 0,
|
||||
}
|
||||
}
|
||||
|
||||
// NewSegmentPadding returns a new Segment with the given padding.
|
||||
func NewSegmentPadding(start, stop, n int) Segment {
|
||||
return Segment{
|
||||
Start: start,
|
||||
Stop: stop,
|
||||
Padding: n,
|
||||
}
|
||||
}
|
||||
|
||||
// Value returns a value of the segment.
|
||||
func (t *Segment) Value(buffer []byte) []byte {
|
||||
if t.Padding == 0 {
|
||||
return buffer[t.Start:t.Stop]
|
||||
}
|
||||
result := make([]byte, 0, t.Padding+t.Stop-t.Start+1)
|
||||
result = append(result, bytes.Repeat(space, t.Padding)...)
|
||||
return append(result, buffer[t.Start:t.Stop]...)
|
||||
}
|
||||
|
||||
// Len returns a length of the segment.
|
||||
func (t *Segment) Len() int {
|
||||
return t.Stop - t.Start + t.Padding
|
||||
}
|
||||
|
||||
// Between returns a segment between this segment and the given segment.
|
||||
func (t *Segment) Between(other Segment) Segment {
|
||||
if t.Stop != other.Stop {
|
||||
panic("invalid state")
|
||||
}
|
||||
return NewSegmentPadding(
|
||||
t.Start,
|
||||
other.Start,
|
||||
t.Padding-other.Padding,
|
||||
)
|
||||
}
|
||||
|
||||
// IsEmpty returns true if this segment is empty, otherwise false.
|
||||
func (t *Segment) IsEmpty() bool {
|
||||
return t.Start >= t.Stop && t.Padding == 0
|
||||
}
|
||||
|
||||
// TrimRightSpace returns a new segment by slicing off all trailing
|
||||
// space characters.
|
||||
func (t *Segment) TrimRightSpace(buffer []byte) Segment {
|
||||
v := buffer[t.Start:t.Stop]
|
||||
l := util.TrimRightSpaceLength(v)
|
||||
if l == len(v) {
|
||||
return NewSegment(t.Start, t.Start)
|
||||
}
|
||||
return NewSegmentPadding(t.Start, t.Stop-l, t.Padding)
|
||||
}
|
||||
|
||||
// TrimLeftSpace returns a new segment by slicing off all leading
|
||||
// space characters including padding.
|
||||
func (t *Segment) TrimLeftSpace(buffer []byte) Segment {
|
||||
v := buffer[t.Start:t.Stop]
|
||||
l := util.TrimLeftSpaceLength(v)
|
||||
return NewSegment(t.Start+l, t.Stop)
|
||||
}
|
||||
|
||||
// TrimLeftSpaceWidth returns a new segment by slicing off leading space
|
||||
// characters until the given width.
|
||||
func (t *Segment) TrimLeftSpaceWidth(width int, buffer []byte) Segment {
|
||||
padding := t.Padding
|
||||
for ; width > 0; width-- {
|
||||
if padding == 0 {
|
||||
break
|
||||
}
|
||||
padding--
|
||||
}
|
||||
if width == 0 {
|
||||
return NewSegmentPadding(t.Start, t.Stop, padding)
|
||||
}
|
||||
text := buffer[t.Start:t.Stop]
|
||||
start := t.Start
|
||||
for _, c := range text {
|
||||
if start >= t.Stop-1 || width <= 0 {
|
||||
break
|
||||
}
|
||||
if c == ' ' {
|
||||
width--
|
||||
} else if c == '\t' {
|
||||
width -= 4
|
||||
} else {
|
||||
break
|
||||
}
|
||||
start++
|
||||
}
|
||||
if width < 0 {
|
||||
padding = width * -1
|
||||
}
|
||||
return NewSegmentPadding(start, t.Stop, padding)
|
||||
}
|
||||
|
||||
// WithStart returns a new Segment with same value except Start.
|
||||
func (t *Segment) WithStart(v int) Segment {
|
||||
return NewSegmentPadding(v, t.Stop, t.Padding)
|
||||
}
|
||||
|
||||
// WithStop returns a new Segment with same value except Stop.
|
||||
func (t *Segment) WithStop(v int) Segment {
|
||||
return NewSegmentPadding(t.Start, v, t.Padding)
|
||||
}
|
||||
|
||||
// ConcatPadding concats the padding to the given slice.
|
||||
func (t *Segment) ConcatPadding(v []byte) []byte {
|
||||
if t.Padding > 0 {
|
||||
return append(v, bytes.Repeat(space, t.Padding)...)
|
||||
}
|
||||
return v
|
||||
}
|
||||
|
||||
// Segments is a collection of the Segment.
|
||||
type Segments struct {
|
||||
values []Segment
|
||||
}
|
||||
|
||||
// NewSegments return a new Segments.
|
||||
func NewSegments() *Segments {
|
||||
return &Segments{
|
||||
values: nil,
|
||||
}
|
||||
}
|
||||
|
||||
// Append appends the given segment after the tail of the collection.
|
||||
func (s *Segments) Append(t Segment) {
|
||||
if s.values == nil {
|
||||
s.values = make([]Segment, 0, 20)
|
||||
}
|
||||
s.values = append(s.values, t)
|
||||
}
|
||||
|
||||
// AppendAll appends all elements of given segments after the tail of the collection.
|
||||
func (s *Segments) AppendAll(t []Segment) {
|
||||
if s.values == nil {
|
||||
s.values = make([]Segment, 0, 20)
|
||||
}
|
||||
s.values = append(s.values, t...)
|
||||
}
|
||||
|
||||
// Len returns the length of the collection.
|
||||
func (s *Segments) Len() int {
|
||||
if s.values == nil {
|
||||
return 0
|
||||
}
|
||||
return len(s.values)
|
||||
}
|
||||
|
||||
// At returns a segment at the given index.
|
||||
func (s *Segments) At(i int) Segment {
|
||||
return s.values[i]
|
||||
}
|
||||
|
||||
// Set sets the given Segment.
|
||||
func (s *Segments) Set(i int, v Segment) {
|
||||
s.values[i] = v
|
||||
}
|
||||
|
||||
// SetSliced replace the collection with a subsliced value.
|
||||
func (s *Segments) SetSliced(lo, hi int) {
|
||||
s.values = s.values[lo:hi]
|
||||
}
|
||||
|
||||
// Sliced returns a subslice of the collection.
|
||||
func (s *Segments) Sliced(lo, hi int) []Segment {
|
||||
return s.values[lo:hi]
|
||||
}
|
||||
|
||||
// Clear delete all element of the collction.
|
||||
func (s *Segments) Clear() {
|
||||
s.values = nil
|
||||
}
|
||||
|
||||
// Unshift insert the given Segment to head of the collection.
|
||||
func (s *Segments) Unshift(v Segment) {
|
||||
s.values = append(s.values[0:1], s.values[0:]...)
|
||||
s.values[0] = v
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue