func (p *parser) prefixHeader(out *bytes.Buffer, data []byte) int {
level := 0
for level < 6 && data[level] == '#' {
level++
}
i := skipChar(data, level, ' ')
end := skipUntilChar(data, i, '\n')
skip := end
id := ""
if p.flags&EXTENSION_HEADER_IDS != 0 {
j, k := 0, 0
// find start/end of header id
for j = i; j < end-1 && (data[j] != '{' || data[j+1] != '#'); j++ {
}
for k = j + 1; k < end && data[k] != '}'; k++ {
}
// extract header id iff found
if j < end && k < end {
id = string(data[j+2 : k])
end = j
skip = k + 1
for end > 0 && data[end-1] == ' ' {
end--
}
}
}
for end > 0 && data[end-1] == '#' {
if isBackslashEscaped(data, end-1) {
break
}
end--
}
for end > 0 && data[end-1] == ' ' {
end--
}
if end > i {
if id == "" && p.flags&EXTENSION_AUTO_HEADER_IDS != 0 {
id = sanitized_anchor_name.Create(string(data[i:end]))
}
work := func() bool {
p.inline(out, data[i:end])
return true
}
p.r.Header(out, work, level, id)
}
return skip
}
func (p *parser) paragraph(out *bytes.Buffer, data []byte) int {
// prev: index of 1st char of previous line
// line: index of 1st char of current line
// i: index of cursor/end of current line
var prev, line, i int
// keep going until we find something to mark the end of the paragraph
for i < len(data) {
// mark the beginning of the current line
prev = line
current := data[i:]
line = i
// did we find a blank line marking the end of the paragraph?
if n := p.isEmpty(current); n > 0 {
// did this blank line followed by a definition list item?
if p.flags&EXTENSION_DEFINITION_LISTS != 0 {
if i < len(data)-1 && data[i+1] == ':' {
return p.list(out, data[prev:], LIST_TYPE_DEFINITION)
}
}
p.renderParagraph(out, data[:i])
return i + n
}
// an underline under some text marks a header, so our paragraph ended on prev line
if i > 0 {
if level := p.isUnderlinedHeader(current); level > 0 {
// render the paragraph
p.renderParagraph(out, data[:prev])
// ignore leading and trailing whitespace
eol := i - 1
for prev < eol && data[prev] == ' ' {
prev++
}
for eol > prev && data[eol-1] == ' ' {
eol--
}
// render the header
// this ugly double closure avoids forcing variables onto the heap
work := func(o *bytes.Buffer, pp *parser, d []byte) func() bool {
return func() bool {
pp.inline(o, d)
return true
}
}(out, p, data[prev:eol])
id := ""
if p.flags&EXTENSION_AUTO_HEADER_IDS != 0 {
id = sanitized_anchor_name.Create(string(data[prev:eol]))
}
p.r.Header(out, work, level, id)
// find the end of the underline
for data[i] != '\n' {
i++
}
return i
}
}
// if the next line starts a block of HTML, then the paragraph ends here
if p.flags&EXTENSION_LAX_HTML_BLOCKS != 0 {
if data[i] == '<' && p.html(out, current, false) > 0 {
// rewind to before the HTML block
p.renderParagraph(out, data[:i])
return i
}
}
// if there's a prefixed header or a horizontal rule after this, paragraph is over
if p.isPrefixHeader(current) || p.isHRule(current) {
p.renderParagraph(out, data[:i])
return i
}
// if there's a definition list item, prev line is a definition term
if p.flags&EXTENSION_DEFINITION_LISTS != 0 {
if p.dliPrefix(current) != 0 {
return p.list(out, data[prev:], LIST_TYPE_DEFINITION)
}
}
// if there's a list after this, paragraph is over
if p.flags&EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK != 0 {
if p.uliPrefix(current) != 0 ||
p.oliPrefix(current) != 0 ||
p.quotePrefix(current) != 0 ||
p.codePrefix(current) != 0 {
p.renderParagraph(out, data[:i])
return i
}
}
// otherwise, scan to the beginning of the next line
for data[i] != '\n' {
i++
}
i++
}
p.renderParagraph(out, data[:i])
return i
}