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Allow OSC to be terminated by BEL

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Also prevent changing streaming state unless in reset state
This commit is contained in:
Kovid Goyal
2022-08-22 11:21:23 +05:30
parent 84cb2638d6
commit 12b0f632bd
2 changed files with 35 additions and 9 deletions
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34
tools/utils/escape_code_parser.go
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@@ -1,6 +1,9 @@
package utils
import "bytes"
import (
"bytes"
"fmt"
)
type parser_state uint8
type csi_state uint8
@@ -13,6 +16,7 @@ const (
esc
csi
st
st_or_bel
esc_st
c1_st
bracketed_paste
@@ -40,7 +44,7 @@ type EscapeCodeParser struct {
// Whether to send escape code bytes as soon as they are received or to
// buffer and send full escape codes
Streaming bool
streaming bool
// Callbacks
HandleRune func(rune)
@@ -52,6 +56,18 @@ type EscapeCodeParser struct {
HandleAPC func([]byte)
}
func (self *EscapeCodeParser) SetStreaming(streaming bool) error {
if self.state != normal || len(self.current_buffer) > 0 {
return fmt.Errorf("Cannot change streaming state when not in reset state")
}
self.streaming = streaming
return nil
}
func (self *EscapeCodeParser) IsStreaming() bool {
return self.streaming
}
func (self *EscapeCodeParser) Parse(data []byte) {
prev := UTF8_ACCEPT
codep := UTF8_ACCEPT
@@ -79,7 +95,7 @@ func (self *EscapeCodeParser) Reset() {
}
func (self *EscapeCodeParser) write_ch(ch byte) {
if self.Streaming {
if self.streaming {
if self.current_callback != nil {
var data [1]byte = [1]byte{ch}
self.current_callback(data[:])
@@ -186,7 +202,7 @@ func (self *EscapeCodeParser) dispatch_char(ch UTF8State) {
dispatch()
}
return
} // end bracketed_paste
} // end self.state == bracketed_paste
switch ch {
case 0x1b:
@@ -198,7 +214,7 @@ func (self *EscapeCodeParser) dispatch_char(ch UTF8State) {
self.state = csi
self.current_callback = self.HandleCSI
case 0x9d:
self.state = st
self.state = st_or_bel
self.current_callback = self.HandleOSC
case 0x98:
self.state = st
@@ -226,7 +242,7 @@ func (self *EscapeCodeParser) dispatch_byte(ch byte) {
self.csi_state = parameter
self.current_callback = self.HandleCSI
case ']':
self.state = st
self.state = st_or_bel
self.current_callback = self.HandleOSC
case '^':
self.state = st
@@ -257,6 +273,12 @@ func (self *EscapeCodeParser) dispatch_byte(ch byte) {
self.dispatch_esc_code()
}
}
case st_or_bel:
if ch == 0x7 {
self.dispatch_esc_code()
return
}
fallthrough
case st:
if ch == 0x1b {
self.state = esc_st