func DetectAtxHeader(first, second Line, detectors Detectors) Handler {
if !bytes.HasPrefix(first.Bytes, []byte("#")) {
return nil
}
done := false
return HandlerFunc(func(line Line, ctx Context) (bool, error) {
if done {
return false, nil
}
done = true
block := md.AtxHeaderBlock{
Raw: md.Raw{md.Run(line)},
}
text := bytes.TrimRight(line.Bytes, "\n")
text = bytes.Trim(text, "#")
if len(text) > 0 {
block.Level, _ = mdutils.OffsetIn(line.Bytes, text)
} else {
block.Level = len(bytes.TrimRight(line.Bytes, "\n"))
}
if block.Level > 6 {
block.Level = 6
}
spanRegion := md.Raw{md.Run{
Line: line.Line,
Bytes: bytes.Trim(text, mdutils.Whites),
}}
ctx.Emit(block)
parseSpans(spanRegion, ctx)
ctx.Emit(md.End{})
return true, nil
})
}
func DetectEmphasis(s *Context) (consumed int) {
rest := s.Buf[s.Pos:]
if !isEmph(rest[0]) {
return 0
}
// find substring composed solely of '*' and '_'
i := 1
for i < len(rest) && isEmph(rest[i]) {
i++
}
indicator := rest[:i]
// "right-fringe-mark"
r, _ := utf8.DecodeRune(rest[len(indicator):])
rightFringe := emphasisFringeRank(r)
r, _ = utf8.DecodeLastRune(s.Buf[:s.Pos])
leftFringe := emphasisFringeRank(r)
// <0 means "left-flanking", >0 "right-flanking", 0 "non-flanking"
flanking := leftFringe - rightFringe
if flanking == 0 {
return len(indicator)
}
// split into "emphasis-tag-strings" - subslices of the same char
tags := [][]byte{}
prev := 0
for curr := 1; curr <= len(indicator); curr++ {
if curr == len(indicator) || indicator[curr] != indicator[prev] {
tags = append(tags, indicator[prev:curr])
prev = curr
}
}
// left-flanking? if yes, add some openings
if flanking < 0 {
for _, tag := range tags {
pos, _ := mdutils.OffsetIn(s.Buf, tag)
s.Openings.Push(MaybeOpening{
Tag: string(tag),
Pos: pos,
})
}
return len(indicator)
}
// right-flanking; maybe a closing tag
closingEmphasisTags(s, tags)
return len(indicator)
}
func DetectOrderedList(start, second Line, detectors Detectors) Handler {
m := reOrderedList.FindSubmatch(start.Bytes)
if m == nil {
return nil
}
var buf *defaultContext
block := &md.OrderedListBlock{
Starter: md.Run{start.Line, m[1]},
// firstNumber, _ := strconv.Atoi(string(m[2]))
}
var item *md.ItemBlock
var carry *Line
var parser *Parser
return HandlerFunc(func(next Line, ctx Context) (bool, error) {
if next.EOF() {
return listEnd2(parser, buf, ctx)
}
prev := carry
carry = &next
if prev == nil {
buf = &defaultContext{
mode: ctx.GetMode(),
detectors: changedParagraphDetector(ctx, false, true),
spanDetectors: ctx.GetSpanDetectors(),
}
block.Raw = append(block.Raw, md.Run(next))
buf.Emit(block)
if ctx.GetMode() != TopBlocks {
item = &md.ItemBlock{}
item.Raw = append(item.Raw, md.Run(next))
buf.Emit(item)
parser = &Parser{
Context: buf,
}
}
return pass(parser, next, next.Bytes[len(block.Starter.Bytes):])
}
nextBytes := bytes.TrimRight(next.Bytes, "\n")
if prev.isBlank() {
if next.isBlank() {
return listEnd2(parser, buf, ctx)
}
if !reOrderedList.Match(nextBytes) &&
next.hasNonSpaceInPrefix(len(block.Starter.Bytes)) {
return listEnd2(parser, buf, ctx)
}
} else {
if !reOrderedList.Match(nextBytes) &&
next.hasNonSpaceInPrefix(len(block.Starter.Bytes)) &&
!next.hasFourSpacePrefix() &&
(reUnorderedList.Match(nextBytes) ||
reHorizontalRule.Match(nextBytes)) {
return listEnd2(parser, buf, ctx)
}
}
block.Raw = append(block.Raw, md.Run(next))
m := reOrderedList.FindSubmatch(next.Bytes)
if m != nil {
text := bytes.TrimLeft(m[1], " ")
spaces, _ := mdutils.OffsetIn(m[1], text)
if spaces >= len(block.Starter.Bytes) {
m = nil
}
}
if m != nil {
if ctx.GetMode() != TopBlocks {
_, err := end(parser, buf)
if err != nil {
return false, err
}
item = &md.ItemBlock{}
item.Raw = append(item.Raw, md.Run(next))
buf.Emit(item)
parser = &Parser{
Context: buf,
}
}
return pass(parser, next, next.Bytes[len(m[1]):])
}
if ctx.GetMode() != TopBlocks {
item.Raw = append(item.Raw, md.Run(next))
}
return pass(parser, next, trimLeftN(next.Bytes, " ", len(block.Starter.Bytes)))
})
}