You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
119 lines
1.8 KiB
Go
119 lines
1.8 KiB
Go
package wikilink
|
|
|
|
import (
|
|
"log"
|
|
"strings"
|
|
"unicode"
|
|
)
|
|
|
|
func lexFragment(l *Lexer) stateFn {
|
|
log.Println("entering lexFragment")
|
|
for {
|
|
if strings.HasPrefix(l.input[l.pos:], CloseLink) {
|
|
return lexCloseLink
|
|
}
|
|
|
|
if l.peek() == '^' {
|
|
l.next()
|
|
l.emit(ItemFragment)
|
|
l.acceptRun("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 -.,")
|
|
|
|
return lexInsideLink
|
|
}
|
|
|
|
return lexInsideLink
|
|
}
|
|
}
|
|
|
|
func lexAlias(l *Lexer) stateFn {
|
|
// l.accept
|
|
log.Println("entering lexAlias")
|
|
for {
|
|
if strings.HasPrefix(l.input[l.pos:], CloseLink) {
|
|
return lexCloseLink
|
|
}
|
|
r := l.next()
|
|
|
|
}
|
|
l.emit(ItemAlias)
|
|
|
|
return lexInsideLink
|
|
}
|
|
|
|
func lexIdent(l *Lexer) stateFn {
|
|
for {
|
|
if strings.HasPrefix(l.input[l.pos:], CloseLink) {
|
|
return lexCloseLink
|
|
}
|
|
// r := l.next()
|
|
}
|
|
return lexInsideLink
|
|
}
|
|
|
|
func lexInsideLink(l *Lexer) stateFn {
|
|
log.Println("entering lexInsideLink")
|
|
|
|
for {
|
|
if strings.HasPrefix(l.input[l.pos:], CloseLink) {
|
|
return lexCloseLink
|
|
}
|
|
|
|
r := l.next()
|
|
log.Printf("inspecting %q\n", string(r))
|
|
|
|
switch {
|
|
case r == EOF:
|
|
case r == '\n':
|
|
return l.errorf("unclosed link")
|
|
case r == '#':
|
|
l.emit(ItemText)
|
|
|
|
return lexFragment
|
|
case r == '|':
|
|
l.emit(ItemText)
|
|
|
|
return lexAlias
|
|
}
|
|
}
|
|
}
|
|
|
|
func lexOpenLink(l *Lexer) stateFn {
|
|
log.Println("entering lexOpenLink")
|
|
l.pos += len(OpenLink)
|
|
l.emit(ItemOpenLink)
|
|
|
|
return lexInsideLink
|
|
}
|
|
|
|
func lexCloseLink(l *Lexer) stateFn {
|
|
log.Println("entering lexCloseLink")
|
|
l.pos += len(CloseLink)
|
|
l.emit(ItemCloseLink)
|
|
|
|
return lexText
|
|
}
|
|
|
|
func lexText(l *Lexer) stateFn {
|
|
log.Println("entering lexText")
|
|
|
|
for {
|
|
if strings.HasPrefix(l.input[l.pos:], OpenLink) {
|
|
if l.pos > l.start {
|
|
l.emit(ItemText)
|
|
}
|
|
|
|
return lexOpenLink
|
|
}
|
|
|
|
if l.next() == EOF {
|
|
break
|
|
}
|
|
if l.pos > l.start {
|
|
l.emit(ItemText)
|
|
}
|
|
l.emit(ItemEOF)
|
|
return nil
|
|
}
|
|
return nil
|
|
}
|