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102 lines
1.8 KiB
Go
102 lines
1.8 KiB
Go
// Copyright 2015 The Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package markdown
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func ruleStrikeThrough(s *StateInline, silent bool) bool {
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src := s.Src
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start := s.Pos
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marker := src[start]
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if silent {
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return false
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}
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if src[start] != '~' {
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return false
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}
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canOpen, canClose, length := s.scanDelims(start, true)
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origLength := length
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ch := string(marker)
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if length < 2 {
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return false
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}
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if length%2 != 0 {
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s.PushToken(&Text{
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Content: ch,
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})
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length--
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}
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for i := 0; i < length; i += 2 {
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s.PushToken(&Text{
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Content: ch + ch,
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})
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s.Delimiters = append(s.Delimiters, Delimiter{
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Marker: marker,
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Length: -1,
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Jump: i,
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Token: len(s.Tokens) - 1,
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Level: s.Level,
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End: -1,
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Open: canOpen,
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Close: canClose,
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})
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}
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s.Pos += origLength
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return true
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}
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func ruleStrikethroughPostprocess(s *StateInline) {
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var loneMarkers []int
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delimiters := s.Delimiters
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max := len(delimiters)
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for i := 0; i < max; i++ {
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startDelim := delimiters[i]
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if startDelim.Marker != '~' {
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continue
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}
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if startDelim.End == -1 {
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continue
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}
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endDelim := delimiters[startDelim.End]
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s.Tokens[startDelim.Token] = &StrikethroughOpen{}
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s.Tokens[endDelim.Token] = &StrikethroughClose{}
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if text, ok := s.Tokens[endDelim.Token-1].(*Text); ok && text.Content == "~" {
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loneMarkers = append(loneMarkers, endDelim.Token-1)
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}
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}
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for len(loneMarkers) > 0 {
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i := loneMarkers[len(loneMarkers)-1]
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loneMarkers = loneMarkers[:len(loneMarkers)-1]
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j := i + 1
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for j < len(s.Tokens) {
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if _, ok := s.Tokens[j].(*StrikethroughClose); !ok {
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break
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}
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j++
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}
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j--
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if i != j {
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s.Tokens[i], s.Tokens[j] = s.Tokens[j], s.Tokens[i]
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}
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}
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}
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