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104 lines
1.6 KiB
Go
104 lines
1.6 KiB
Go
package wikilink
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import (
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"log"
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"strings"
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)
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func lexFragment(l *Lexer) stateFn {
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log.Println("entering lexFragment")
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for {
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if strings.HasPrefix(l.input[l.pos:], CloseLink) {
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return lexCloseLink
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}
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if l.peek() == '^' {
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l.next()
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l.emit(ItemFragment)
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l.acceptRun("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 -.,")
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return lexInsideLink
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}
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return lexInsideLink
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}
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}
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func lexAlias(l *Lexer) stateFn {
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// l.accept
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log.Println("entering lexAlias")
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if strings.HasPrefix(l.input[l.pos:], CloseLink) {
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return lexCloseLink
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}
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l.emit(ItemAlias)
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return lexInsideLink
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}
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func lexInsideLink(l *Lexer) stateFn {
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log.Println("entering lexInsideLink")
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for {
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if strings.HasPrefix(l.input[l.pos:], CloseLink) {
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return lexCloseLink
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}
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r := l.next()
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log.Printf("inspecting %q\n", string(r))
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switch {
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case r == EOF:
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case r == '\n':
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return l.errorf("unclosed link")
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case r == '#':
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l.emit(ItemText)
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return lexFragment
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case r == '|':
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l.emit(ItemText)
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return lexAlias
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}
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}
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}
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func lexOpenLink(l *Lexer) stateFn {
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log.Println("entering lexOpenLink")
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l.pos += len(OpenLink)
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l.emit(ItemOpenLink)
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return lexInsideLink
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}
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func lexCloseLink(l *Lexer) stateFn {
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log.Println("entering lexCloseLink")
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l.pos += len(CloseLink)
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l.emit(ItemCloseLink)
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return lexText
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}
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func lexText(l *Lexer) stateFn {
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log.Println("entering lexText")
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for {
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if strings.HasPrefix(l.input[l.pos:], OpenLink) {
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if l.pos > l.start {
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l.emit(ItemText)
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}
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return lexOpenLink
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}
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if l.next() == EOF {
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break
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}
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if l.pos > l.start {
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l.emit(ItemText)
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}
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l.emit(ItemEOF)
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return nil
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}
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return nil
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}
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