1 package ansiterm
2
3 type stateID int
4
5 type state interface {
6 Enter() error
7 Exit() error
8 Handle(byte) (state, error)
9 Name() string
10 Transition(state) error
11 }
12
13 type baseState struct {
14 name string
15 parser *AnsiParser
16 }
17
18 func (base baseState) Enter() error {
19 return nil
20 }
21
22 func (base baseState) Exit() error {
23 return nil
24 }
25
26 func (base baseState) Handle(b byte) (s state, e error) {
27
28 switch {
29 case b == CSI_ENTRY:
30 return base.parser.csiEntry, nil
31 case b == DCS_ENTRY:
32 return base.parser.dcsEntry, nil
33 case b == ANSI_ESCAPE_PRIMARY:
34 return base.parser.escape, nil
35 case b == OSC_STRING:
36 return base.parser.oscString, nil
37 case sliceContains(toGroundBytes, b):
38 return base.parser.ground, nil
39 }
40
41 return nil, nil
42 }
43
44 func (base baseState) Name() string {
45 return base.name
46 }
47
48 func (base baseState) Transition(s state) error {
49 if s == base.parser.ground {
50 execBytes := []byte{0x18}
51 execBytes = append(execBytes, 0x1A)
52 execBytes = append(execBytes, getByteRange(0x80, 0x8F)...)
53 execBytes = append(execBytes, getByteRange(0x91, 0x97)...)
54 execBytes = append(execBytes, 0x99)
55 execBytes = append(execBytes, 0x9A)
56
57 if sliceContains(execBytes, base.parser.context.currentChar) {
58 return base.parser.execute()
59 }
60 }
61
62 return nil
63 }
64
65 type dcsEntryState struct {
66 baseState
67 }
68
69 type errorState struct {
70 baseState
71 }
72
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