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