85 lines
2.1 KiB
Go
85 lines
2.1 KiB
Go
package parser
|
|
|
|
import (
|
|
"github.com/yuin/goldmark/ast"
|
|
"github.com/yuin/goldmark/text"
|
|
)
|
|
|
|
type codeSpanParser struct {
|
|
}
|
|
|
|
var defaultCodeSpanParser = &codeSpanParser{}
|
|
|
|
// NewCodeSpanParser return a new InlineParser that parses inline codes
|
|
// surrounded by '`' .
|
|
func NewCodeSpanParser() InlineParser {
|
|
return defaultCodeSpanParser
|
|
}
|
|
|
|
func (s *codeSpanParser) Trigger() []byte {
|
|
return []byte{'`'}
|
|
}
|
|
|
|
func (s *codeSpanParser) Parse(parent ast.Node, block text.Reader, pc Context) ast.Node {
|
|
line, startSegment := block.PeekLine()
|
|
opener := 0
|
|
for ; opener < len(line) && line[opener] == '`'; opener++ {
|
|
}
|
|
block.Advance(opener)
|
|
l, pos := block.Position()
|
|
node := ast.NewCodeSpan()
|
|
for {
|
|
line, segment := block.PeekLine()
|
|
if line == nil {
|
|
block.SetPosition(l, pos)
|
|
return ast.NewTextSegment(startSegment.WithStop(startSegment.Start + opener))
|
|
}
|
|
for i := 0; i < len(line); i++ {
|
|
c := line[i]
|
|
if c == '`' {
|
|
oldi := i
|
|
for ; i < len(line) && line[i] == '`'; i++ {
|
|
}
|
|
closure := i - oldi
|
|
if closure == opener && (i >= len(line) || line[i] != '`') {
|
|
segment = segment.WithStop(segment.Start + i - closure)
|
|
if !segment.IsEmpty() {
|
|
node.AppendChild(node, ast.NewRawTextSegment(segment))
|
|
}
|
|
block.Advance(i)
|
|
goto end
|
|
}
|
|
}
|
|
}
|
|
node.AppendChild(node, ast.NewRawTextSegment(segment))
|
|
block.AdvanceLine()
|
|
}
|
|
end:
|
|
if !node.IsBlank(block.Source()) {
|
|
// trim first halfspace and last halfspace
|
|
segment := node.FirstChild().(*ast.Text).Segment
|
|
shouldTrimmed := true
|
|
if !(!segment.IsEmpty() && isSpaceOrNewline(block.Source()[segment.Start])) {
|
|
shouldTrimmed = false
|
|
}
|
|
segment = node.LastChild().(*ast.Text).Segment
|
|
if !(!segment.IsEmpty() && isSpaceOrNewline(block.Source()[segment.Stop-1])) {
|
|
shouldTrimmed = false
|
|
}
|
|
if shouldTrimmed {
|
|
t := node.FirstChild().(*ast.Text)
|
|
segment := t.Segment
|
|
t.Segment = segment.WithStart(segment.Start + 1)
|
|
t = node.LastChild().(*ast.Text)
|
|
segment = node.LastChild().(*ast.Text).Segment
|
|
t.Segment = segment.WithStop(segment.Stop - 1)
|
|
}
|
|
|
|
}
|
|
return node
|
|
}
|
|
|
|
func isSpaceOrNewline(c byte) bool {
|
|
return c == ' ' || c == '\n'
|
|
}
|