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forgejo/vendor/github.com/alecthomas/chroma/iterator.go
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Vendor Update (#16121)
* update github.com/PuerkitoBio/goquery

* update github.com/alecthomas/chroma

* update github.com/blevesearch/bleve/v2

* update github.com/caddyserver/certmagic

* update github.com/go-enry/go-enry/v2

* update github.com/go-git/go-billy/v5

* update github.com/go-git/go-git/v5

* update github.com/go-redis/redis/v8

* update github.com/go-testfixtures/testfixtures/v3

* update github.com/jaytaylor/html2text

* update github.com/json-iterator/go

* update github.com/klauspost/compress

* update github.com/markbates/goth

* update github.com/mattn/go-isatty

* update github.com/mholt/archiver/v3

* update github.com/microcosm-cc/bluemonday

* update github.com/minio/minio-go/v7

* update github.com/prometheus/client_golang

* update github.com/unrolled/render

* update github.com/xanzy/go-gitlab

* update github.com/yuin/goldmark

* update github.com/yuin/goldmark-highlighting

Co-authored-by: techknowlogick <techknowlogick@gitea.io>
2021-06-10 16:44:25 +02:00

76 lines
1.7 KiB
Go
Vendored

package chroma
import "strings"
// An Iterator across tokens.
//
// EOF will be returned at the end of the Token stream.
//
// If an error occurs within an Iterator, it may propagate this in a panic. Formatters should recover.
type Iterator func() Token
// Tokens consumes all tokens from the iterator and returns them as a slice.
func (i Iterator) Tokens() []Token {
var out []Token
for t := i(); t != EOF; t = i() {
out = append(out, t)
}
return out
}
// Concaterator concatenates tokens from a series of iterators.
func Concaterator(iterators ...Iterator) Iterator {
return func() Token {
for len(iterators) > 0 {
t := iterators[0]()
if t != EOF {
return t
}
iterators = iterators[1:]
}
return EOF
}
}
// Literator converts a sequence of literal Tokens into an Iterator.
func Literator(tokens ...Token) Iterator {
return func() Token {
if len(tokens) == 0 {
return EOF
}
token := tokens[0]
tokens = tokens[1:]
return token
}
}
// SplitTokensIntoLines splits tokens containing newlines in two.
func SplitTokensIntoLines(tokens []Token) (out [][]Token) {
var line []Token // nolint: prealloc
for _, token := range tokens {
for strings.Contains(token.Value, "\n") {
parts := strings.SplitAfterN(token.Value, "\n", 2)
// Token becomes the tail.
token.Value = parts[1]
// Append the head to the line and flush the line.
clone := token.Clone()
clone.Value = parts[0]
line = append(line, clone)
out = append(out, line)
line = nil
}
line = append(line, token)
}
if len(line) > 0 {
out = append(out, line)
}
// Strip empty trailing token line.
if len(out) > 0 {
last := out[len(out)-1]
if len(last) == 1 && last[0].Value == "" {
out = out[:len(out)-1]
}
}
return
}