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// Copyright 2015 The Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package markdown
import "strings"
func ruleFence(s *StateBlock, startLine, endLine int, silent bool) bool {
haveEndMarker := false
pos := s.BMarks[startLine] + s.TShift[startLine]
max := s.EMarks[startLine]
if s.SCount[startLine]-s.BlkIndent >= 4 {
return false
}
if pos+3 > max {
return false
}
src := s.Src
marker := src[pos]
if marker != '~' && marker != '`' {
return false
}
mem := pos
pos = s.SkipBytes(pos, marker)
len := pos - mem
if len < 3 {
return false
}
params := strings.TrimSpace(src[pos:max])
if strings.IndexByte(params, marker) >= 0 {
return false
}
if silent {
return true
}
nextLine := startLine
for {
nextLine++
if nextLine >= endLine {
break
}
mem = s.BMarks[nextLine] + s.TShift[nextLine]
pos = mem
max = s.EMarks[nextLine]
if pos < max && s.SCount[nextLine] < s.BlkIndent {
break
}
if pos >= max || src[pos] != marker {
continue
}
if s.SCount[nextLine]-s.BlkIndent >= 4 {
continue
}
pos = s.SkipBytes(pos, marker)
if pos-mem < len {
continue
}
pos = s.SkipSpaces(pos)
if pos < max {
continue
}
haveEndMarker = true
break
}
len = s.SCount[startLine]
s.Line = nextLine
if haveEndMarker {
s.Line++
}
s.PushToken(&Fence{
Params: params,
Content: s.Lines(startLine+1, nextLine, len, true),
Map: [2]int{startLine, s.Line},
})
return true
}
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