예제 #1
0
func (p *parser) prefixHeader(out *bytes.Buffer, data []byte) int {
	level := 0
	for level < 6 && data[level] == '#' {
		level++
	}
	i, end := 0, 0
	for i = level; data[i] == ' '; i++ {
	}
	for end = i; data[end] != '\n'; end++ {
	}
	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] == '#' {
		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
}
예제 #2
0
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 {
			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 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
}