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// Copyright 2022 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
//go:generate go run invisible/generate.go -v -o ./invisible_gen.go
//go:generate go run ambiguous/generate.go -v -o ./ambiguous_gen.go ambiguous/ambiguous.json
package charset
import (
"bufio"
"io"
"strings"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/translation"
)
// RuneNBSP is the codepoint for NBSP
const RuneNBSP = 0xa0
// EscapeControlHTML escapes the unicode control sequences in a provided html document
func EscapeControlHTML(text string, locale translation.Locale, allowed ...rune) (escaped *EscapeStatus, output string) {
sb := &strings.Builder{}
outputStream := &HTMLStreamerWriter{Writer: sb}
streamer := NewEscapeStreamer(locale, outputStream, allowed...).(*escapeStreamer)
if err := StreamHTML(strings.NewReader(text), streamer); err != nil {
streamer.escaped.HasError = true
log.Error("Error whilst escaping: %v", err)
}
return streamer.escaped, sb.String()
}
// EscapeControlReaders escapes the unicode control sequences in a provided reader of HTML content and writer in a locale and returns the findings as an EscapeStatus and the escaped []byte
func EscapeControlReader(reader io.Reader, writer io.Writer, locale translation.Locale, allowed ...rune) (escaped *EscapeStatus, err error) {
outputStream := &HTMLStreamerWriter{Writer: writer}
streamer := NewEscapeStreamer(locale, outputStream, allowed...).(*escapeStreamer)
if err = StreamHTML(reader, streamer); err != nil {
streamer.escaped.HasError = true
log.Error("Error whilst escaping: %v", err)
}
return streamer.escaped, err
}
// EscapeControlStringReader escapes the unicode control sequences in a provided reader of string content and writer in a locale and returns the findings as an EscapeStatus and the escaped []byte. HTML line breaks are not inserted after every newline by this method.
func EscapeControlStringReader(reader io.Reader, writer io.Writer, locale translation.Locale, allowed ...rune) (escaped *EscapeStatus, err error) {
bufRd := bufio.NewReader(reader)
outputStream := &HTMLStreamerWriter{Writer: writer}
streamer := NewEscapeStreamer(locale, outputStream, allowed...).(*escapeStreamer)
for {
line, rdErr := bufRd.ReadString('\n')
if len(line) > 0 {
if err := streamer.Text(line); err != nil {
streamer.escaped.HasError = true
log.Error("Error whilst escaping: %v", err)
return streamer.escaped, err
}
}
if rdErr != nil {
if rdErr != io.EOF {
err = rdErr
}
break
}
}
return streamer.escaped, err
}
// EscapeControlString escapes the unicode control sequences in a provided string and returns the findings as an EscapeStatus and the escaped string
func EscapeControlString(text string, locale translation.Locale, allowed ...rune) (escaped *EscapeStatus, output string) {
sb := &strings.Builder{}
outputStream := &HTMLStreamerWriter{Writer: sb}
streamer := NewEscapeStreamer(locale, outputStream, allowed...).(*escapeStreamer)
if err := streamer.Text(text); err != nil {
streamer.escaped.HasError = true
log.Error("Error whilst escaping: %v", err)
}
return streamer.escaped, sb.String()
}
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