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-rw-r--r--config/bindings.go284
1 files changed, 284 insertions, 0 deletions
diff --git a/config/bindings.go b/config/bindings.go
new file mode 100644
index 00000000..c10b68f6
--- /dev/null
+++ b/config/bindings.go
@@ -0,0 +1,284 @@
+package config
+
+import (
+ "bytes"
+ "errors"
+ "fmt"
+ "io"
+ "strings"
+
+ "github.com/gdamore/tcell"
+)
+
+type KeyStroke struct {
+ Key tcell.Key
+ Rune rune
+}
+
+type Binding struct {
+ Output []KeyStroke
+ Input []KeyStroke
+}
+
+type KeyBindings []*Binding
+
+const (
+ BINDING_FOUND = iota
+ BINDING_INCOMPLETE
+ BINDING_NOT_FOUND
+)
+
+type BindingSearchResult int
+
+func NewKeyBindings() *KeyBindings {
+ return &KeyBindings{}
+}
+
+func (bindings *KeyBindings) Add(binding *Binding) {
+ // TODO: Search for conflicts?
+ *bindings = append(*bindings, binding)
+}
+
+func (bindings *KeyBindings) GetBinding(
+ input []KeyStroke) (BindingSearchResult, []KeyStroke) {
+
+ incomplete := false
+ // TODO: This could probably be a sorted list to speed things up
+ // TODO: Deal with bindings that share a prefix
+ for _, binding := range *bindings {
+ if len(binding.Input) < len(input) {
+ continue
+ }
+ for i, stroke := range input {
+ if stroke != binding.Input[i] {
+ goto next
+ }
+ }
+ if len(binding.Input) != len(input) {
+ incomplete = true
+ } else {
+ return BINDING_FOUND, binding.Output
+ }
+ next:
+ }
+ if incomplete {
+ return BINDING_INCOMPLETE, nil
+ }
+ return BINDING_NOT_FOUND, nil
+}
+
+var (
+ keyNames map[string]tcell.Key
+)
+
+func ParseKeyStrokes(keystrokes string) ([]KeyStroke, error) {
+ var strokes []KeyStroke
+ buf := bytes.NewBufferString(keystrokes)
+ for {
+ tok, _, err := buf.ReadRune()
+ if err == io.EOF {
+ break
+ } else if err != nil {
+ return nil, err
+ }
+ // TODO: make it possible to bind to < or > themselves (and default to
+ // switching accounts)
+ switch tok {
+ case '<':
+ name, err := buf.ReadString(byte('>'))
+ if err == io.EOF {
+ return nil, errors.New("Expecting '>'")
+ } else if err != nil {
+ return nil, err
+ } else if name == ">" {
+ return nil, errors.New("Expected a key name")
+ }
+ name = name[:len(name)-1]
+ if key, ok := keyNames[strings.ToLower(name)]; ok {
+ strokes = append(strokes, KeyStroke{
+ Key: key,
+ })
+ } else {
+ return nil, errors.New(fmt.Sprintf("Unknown key '%s'", name))
+ }
+ case '>':
+ return nil, errors.New("Found '>' without '<'")
+ default:
+ strokes = append(strokes, KeyStroke{
+ Key: tcell.KeyRune,
+ Rune: tok,
+ })
+ }
+ }
+ return strokes, nil
+}
+
+func ParseBinding(input, output string) (*Binding, error) {
+ in, err := ParseKeyStrokes(input)
+ if err != nil {
+ return nil, err
+ }
+ out, err := ParseKeyStrokes(output)
+ if err != nil {
+ return nil, err
+ }
+ return &Binding{
+ Input: in,
+ Output: out,
+ }, nil
+}
+
+func init() {
+ keyNames = make(map[string]tcell.Key)
+ keyNames["up"] = tcell.KeyUp
+ keyNames["down"] = tcell.KeyDown
+ keyNames["right"] = tcell.KeyRight
+ keyNames["left"] = tcell.KeyLeft
+ keyNames["upleft"] = tcell.KeyUpLeft
+ keyNames["upright"] = tcell.KeyUpRight
+ keyNames["downleft"] = tcell.KeyDownLeft
+ keyNames["downright"] = tcell.KeyDownRight
+ keyNames["center"] = tcell.KeyCenter
+ keyNames["pgup"] = tcell.KeyPgUp
+ keyNames["pgdn"] = tcell.KeyPgDn
+ keyNames["home"] = tcell.KeyHome
+ keyNames["end"] = tcell.KeyEnd
+ keyNames["insert"] = tcell.KeyInsert
+ keyNames["delete"] = tcell.KeyDelete
+ keyNames["help"] = tcell.KeyHelp
+ keyNames["exit"] = tcell.KeyExit
+ keyNames["clear"] = tcell.KeyClear
+ keyNames["cancel"] = tcell.KeyCancel
+ keyNames["print"] = tcell.KeyPrint
+ keyNames["pause"] = tcell.KeyPause
+ keyNames["backtab"] = tcell.KeyBacktab
+ keyNames["f1"] = tcell.KeyF1
+ keyNames["f2"] = tcell.KeyF2
+ keyNames["f3"] = tcell.KeyF3
+ keyNames["f4"] = tcell.KeyF4
+ keyNames["f5"] = tcell.KeyF5
+ keyNames["f6"] = tcell.KeyF6
+ keyNames["f7"] = tcell.KeyF7
+ keyNames["f8"] = tcell.KeyF8
+ keyNames["f9"] = tcell.KeyF9
+ keyNames["f10"] = tcell.KeyF10
+ keyNames["f11"] = tcell.KeyF11
+ keyNames["f12"] = tcell.KeyF12
+ keyNames["f13"] = tcell.KeyF13
+ keyNames["f14"] = tcell.KeyF14
+ keyNames["f15"] = tcell.KeyF15
+ keyNames["f16"] = tcell.KeyF16
+ keyNames["f17"] = tcell.KeyF17
+ keyNames["f18"] = tcell.KeyF18
+ keyNames["f19"] = tcell.KeyF19
+ keyNames["f20"] = tcell.KeyF20
+ keyNames["f21"] = tcell.KeyF21
+ keyNames["f22"] = tcell.KeyF22
+ keyNames["f23"] = tcell.KeyF23
+ keyNames["f24"] = tcell.KeyF24
+ keyNames["f25"] = tcell.KeyF25
+ keyNames["f26"] = tcell.KeyF26
+ keyNames["f27"] = tcell.KeyF27
+ keyNames["f28"] = tcell.KeyF28
+ keyNames["f29"] = tcell.KeyF29
+ keyNames["f30"] = tcell.KeyF30
+ keyNames["f31"] = tcell.KeyF31
+ keyNames["f32"] = tcell.KeyF32
+ keyNames["f33"] = tcell.KeyF33
+ keyNames["f34"] = tcell.KeyF34
+ keyNames["f35"] = tcell.KeyF35
+ keyNames["f36"] = tcell.KeyF36
+ keyNames["f37"] = tcell.KeyF37
+ keyNames["f38"] = tcell.KeyF38
+ keyNames["f39"] = tcell.KeyF39
+ keyNames["f40"] = tcell.KeyF40
+ keyNames["f41"] = tcell.KeyF41
+ keyNames["f42"] = tcell.KeyF42
+ keyNames["f43"] = tcell.KeyF43
+ keyNames["f44"] = tcell.KeyF44
+ keyNames["f45"] = tcell.KeyF45
+ keyNames["f46"] = tcell.KeyF46
+ keyNames["f47"] = tcell.KeyF47
+ keyNames["f48"] = tcell.KeyF48
+ keyNames["f49"] = tcell.KeyF49
+ keyNames["f50"] = tcell.KeyF50
+ keyNames["f51"] = tcell.KeyF51
+ keyNames["f52"] = tcell.KeyF52
+ keyNames["f53"] = tcell.KeyF53
+ keyNames["f54"] = tcell.KeyF54
+ keyNames["f55"] = tcell.KeyF55
+ keyNames["f56"] = tcell.KeyF56
+ keyNames["f57"] = tcell.KeyF57
+ keyNames["f58"] = tcell.KeyF58
+ keyNames["f59"] = tcell.KeyF59
+ keyNames["f60"] = tcell.KeyF60
+ keyNames["f61"] = tcell.KeyF61
+ keyNames["f62"] = tcell.KeyF62
+ keyNames["f63"] = tcell.KeyF63
+ keyNames["f64"] = tcell.KeyF64
+ keyNames["c-space"] = tcell.KeyCtrlSpace
+ keyNames["c-a"] = tcell.KeyCtrlA
+ keyNames["c-b"] = tcell.KeyCtrlB
+ keyNames["c-c"] = tcell.KeyCtrlC
+ keyNames["c-d"] = tcell.KeyCtrlD
+ keyNames["c-e"] = tcell.KeyCtrlE
+ keyNames["c-f"] = tcell.KeyCtrlF
+ keyNames["c-g"] = tcell.KeyCtrlG
+ keyNames["c-h"] = tcell.KeyCtrlH
+ keyNames["c-i"] = tcell.KeyCtrlI
+ keyNames["c-j"] = tcell.KeyCtrlJ
+ keyNames["c-k"] = tcell.KeyCtrlK
+ keyNames["c-l"] = tcell.KeyCtrlL
+ keyNames["c-m"] = tcell.KeyCtrlM
+ keyNames["c-n"] = tcell.KeyCtrlN
+ keyNames["c-o"] = tcell.KeyCtrlO
+ keyNames["c-p"] = tcell.KeyCtrlP
+ keyNames["c-q"] = tcell.KeyCtrlQ
+ keyNames["c-r"] = tcell.KeyCtrlR
+ keyNames["c-s"] = tcell.KeyCtrlS
+ keyNames["c-t"] = tcell.KeyCtrlT
+ keyNames["c-u"] = tcell.KeyCtrlU
+ keyNames["c-v"] = tcell.KeyCtrlV
+ keyNames["c-w"] = tcell.KeyCtrlW
+ keyNames["c-x"] = tcell.KeyCtrlX
+ keyNames["c-y"] = tcell.KeyCtrlY
+ keyNames["c-z"] = tcell.KeyCtrlZ
+ keyNames["c-]"] = tcell.KeyCtrlLeftSq
+ keyNames["c-\\"] = tcell.KeyCtrlBackslash
+ keyNames["c-["] = tcell.KeyCtrlRightSq
+ keyNames["c-^"] = tcell.KeyCtrlCarat
+ keyNames["c-_"] = tcell.KeyCtrlUnderscore
+ keyNames["NUL"] = tcell.KeyNUL
+ keyNames["SOH"] = tcell.KeySOH
+ keyNames["STX"] = tcell.KeySTX
+ keyNames["ETX"] = tcell.KeyETX
+ keyNames["EOT"] = tcell.KeyEOT
+ keyNames["ENQ"] = tcell.KeyENQ
+ keyNames["ACK"] = tcell.KeyACK
+ keyNames["BEL"] = tcell.KeyBEL
+ keyNames["BS"] = tcell.KeyBS
+ keyNames["TAB"] = tcell.KeyTAB
+ keyNames["LF"] = tcell.KeyLF
+ keyNames["VT"] = tcell.KeyVT
+ keyNames["FF"] = tcell.KeyFF
+ keyNames["CR"] = tcell.KeyCR
+ keyNames["SO"] = tcell.KeySO
+ keyNames["SI"] = tcell.KeySI
+ keyNames["DLE"] = tcell.KeyDLE
+ keyNames["DC1"] = tcell.KeyDC1
+ keyNames["DC2"] = tcell.KeyDC2
+ keyNames["DC3"] = tcell.KeyDC3
+ keyNames["DC4"] = tcell.KeyDC4
+ keyNames["NAK"] = tcell.KeyNAK
+ keyNames["SYN"] = tcell.KeySYN
+ keyNames["ETB"] = tcell.KeyETB
+ keyNames["CAN"] = tcell.KeyCAN
+ keyNames["EM"] = tcell.KeyEM
+ keyNames["SUB"] = tcell.KeySUB
+ keyNames["ESC"] = tcell.KeyESC
+ keyNames["FS"] = tcell.KeyFS
+ keyNames["GS"] = tcell.KeyGS
+ keyNames["RS"] = tcell.KeyRS
+ keyNames["US"] = tcell.KeyUS
+ keyNames["DEL"] = tcell.KeyDEL
+}