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package parser
import (
"github.com/yuin/goldmark/ast"
"github.com/yuin/goldmark/text"
"github.com/yuin/goldmark/util"
)
type paragraphParser struct {
}
var defaultParagraphParser = ¶graphParser{}
// NewParagraphParser returns a new BlockParser that
// parses paragraphs.
func NewParagraphParser() BlockParser {
return defaultParagraphParser
}
func (b *paragraphParser) Trigger() []byte {
return nil
}
func (b *paragraphParser) Open(parent ast.Node, reader text.Reader, pc Context) (ast.Node, State) {
_, segment := reader.PeekLine()
segment = segment.TrimLeftSpace(reader.Source())
if segment.IsEmpty() {
return nil, NoChildren
}
node := ast.NewParagraph()
node.Lines().Append(segment)
reader.Advance(segment.Len() - 1)
return node, NoChildren
}
func (b *paragraphParser) Continue(node ast.Node, reader text.Reader, pc Context) State {
line, segment := reader.PeekLine()
if util.IsBlank(line) {
return Close
}
node.Lines().Append(segment)
reader.Advance(segment.Len() - 1)
return Continue | NoChildren
}
func (b *paragraphParser) Close(node ast.Node, reader text.Reader, pc Context) {
lines := node.Lines()
if lines.Len() != 0 {
// trim leading spaces
for i := 0; i < lines.Len(); i++ {
l := lines.At(i)
lines.Set(i, l.TrimLeftSpace(reader.Source()))
}
// trim trailing spaces
length := lines.Len()
lastLine := node.Lines().At(length - 1)
node.Lines().Set(length-1, lastLine.TrimRightSpace(reader.Source()))
}
if lines.Len() == 0 {
node.Parent().RemoveChild(node.Parent(), node)
return
}
}
func (b *paragraphParser) CanInterruptParagraph() bool {
return false
}
func (b *paragraphParser) CanAcceptIndentedLine() bool {
return false
}
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