310 lines
10 KiB
Go
310 lines
10 KiB
Go
package config
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import (
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"bytes"
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"errors"
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"fmt"
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"io"
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"strings"
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"github.com/gdamore/tcell"
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)
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type KeyStroke struct {
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Key tcell.Key
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Rune rune
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}
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type Binding struct {
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Output []KeyStroke
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Input []KeyStroke
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}
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type KeyBindings struct {
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bindings []*Binding
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// If false, disable global keybindings in this context
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Globals bool
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// Which key opens the ex line (default is :)
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ExKey KeyStroke
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}
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const (
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BINDING_FOUND = iota
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BINDING_INCOMPLETE
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BINDING_NOT_FOUND
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)
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type BindingSearchResult int
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func NewKeyBindings() *KeyBindings {
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return &KeyBindings{
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ExKey: KeyStroke{tcell.KeyRune, ':'},
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Globals: true,
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}
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}
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func MergeBindings(bindings ...*KeyBindings) *KeyBindings {
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merged := NewKeyBindings()
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for _, b := range bindings {
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merged.bindings = append(merged.bindings, b.bindings...)
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}
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merged.ExKey = bindings[0].ExKey
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merged.Globals = bindings[0].Globals
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return merged
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}
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func (bindings *KeyBindings) Add(binding *Binding) {
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// TODO: Search for conflicts?
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bindings.bindings = append(bindings.bindings, binding)
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}
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func (bindings *KeyBindings) GetBinding(
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input []KeyStroke) (BindingSearchResult, []KeyStroke) {
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incomplete := false
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// TODO: This could probably be a sorted list to speed things up
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// TODO: Deal with bindings that share a prefix
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for _, binding := range bindings.bindings {
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if len(binding.Input) < len(input) {
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continue
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}
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for i, stroke := range input {
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if stroke.Key != binding.Input[i].Key {
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goto next
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}
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if stroke.Key == tcell.KeyRune &&
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stroke.Rune != binding.Input[i].Rune {
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goto next
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}
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}
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if len(binding.Input) != len(input) {
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incomplete = true
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} else {
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return BINDING_FOUND, binding.Output
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}
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next:
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}
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if incomplete {
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return BINDING_INCOMPLETE, nil
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}
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return BINDING_NOT_FOUND, nil
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}
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var (
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keyNames map[string]KeyStroke
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)
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func ParseKeyStrokes(keystrokes string) ([]KeyStroke, error) {
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var strokes []KeyStroke
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buf := bytes.NewBufferString(keystrokes)
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for {
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tok, _, err := buf.ReadRune()
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if err == io.EOF {
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break
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} else if err != nil {
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return nil, err
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}
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// TODO: make it possible to bind to < or > themselves (and default to
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// switching accounts)
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switch tok {
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case '<':
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name, err := buf.ReadString(byte('>'))
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if err == io.EOF {
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return nil, errors.New("Expecting '>'")
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} else if err != nil {
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return nil, err
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} else if name == ">" {
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return nil, errors.New("Expected a key name")
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}
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name = name[:len(name)-1]
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if key, ok := keyNames[strings.ToLower(name)]; ok {
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strokes = append(strokes, key)
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} else {
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return nil, fmt.Errorf("Unknown key '%s'", name)
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}
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case '>':
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return nil, errors.New("Found '>' without '<'")
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default:
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strokes = append(strokes, KeyStroke{
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Key: tcell.KeyRune,
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Rune: tok,
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})
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}
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}
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return strokes, nil
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}
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func ParseBinding(input, output string) (*Binding, error) {
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in, err := ParseKeyStrokes(input)
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if err != nil {
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return nil, err
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}
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out, err := ParseKeyStrokes(output)
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if err != nil {
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return nil, err
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}
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return &Binding{
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Input: in,
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Output: out,
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}, nil
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}
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func init() {
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keyNames = make(map[string]KeyStroke)
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keyNames["space"] = KeyStroke{tcell.KeyRune, ' '}
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keyNames["semicolon"] = KeyStroke{tcell.KeyRune, ';'}
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keyNames["enter"] = KeyStroke{tcell.KeyEnter, 0}
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keyNames["up"] = KeyStroke{tcell.KeyUp, 0}
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keyNames["down"] = KeyStroke{tcell.KeyDown, 0}
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keyNames["right"] = KeyStroke{tcell.KeyRight, 0}
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keyNames["left"] = KeyStroke{tcell.KeyLeft, 0}
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keyNames["upleft"] = KeyStroke{tcell.KeyUpLeft, 0}
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keyNames["upright"] = KeyStroke{tcell.KeyUpRight, 0}
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keyNames["downleft"] = KeyStroke{tcell.KeyDownLeft, 0}
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keyNames["downright"] = KeyStroke{tcell.KeyDownRight, 0}
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keyNames["center"] = KeyStroke{tcell.KeyCenter, 0}
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keyNames["pgup"] = KeyStroke{tcell.KeyPgUp, 0}
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keyNames["pgdn"] = KeyStroke{tcell.KeyPgDn, 0}
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keyNames["home"] = KeyStroke{tcell.KeyHome, 0}
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keyNames["end"] = KeyStroke{tcell.KeyEnd, 0}
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keyNames["insert"] = KeyStroke{tcell.KeyInsert, 0}
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keyNames["delete"] = KeyStroke{tcell.KeyDelete, 0}
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keyNames["help"] = KeyStroke{tcell.KeyHelp, 0}
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keyNames["exit"] = KeyStroke{tcell.KeyExit, 0}
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keyNames["clear"] = KeyStroke{tcell.KeyClear, 0}
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keyNames["cancel"] = KeyStroke{tcell.KeyCancel, 0}
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keyNames["print"] = KeyStroke{tcell.KeyPrint, 0}
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keyNames["pause"] = KeyStroke{tcell.KeyPause, 0}
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keyNames["backtab"] = KeyStroke{tcell.KeyBacktab, 0}
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keyNames["f1"] = KeyStroke{tcell.KeyF1, 0}
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keyNames["f2"] = KeyStroke{tcell.KeyF2, 0}
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keyNames["f3"] = KeyStroke{tcell.KeyF3, 0}
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keyNames["f4"] = KeyStroke{tcell.KeyF4, 0}
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keyNames["f5"] = KeyStroke{tcell.KeyF5, 0}
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keyNames["f6"] = KeyStroke{tcell.KeyF6, 0}
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keyNames["f7"] = KeyStroke{tcell.KeyF7, 0}
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keyNames["f8"] = KeyStroke{tcell.KeyF8, 0}
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keyNames["f9"] = KeyStroke{tcell.KeyF9, 0}
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keyNames["f10"] = KeyStroke{tcell.KeyF10, 0}
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keyNames["f11"] = KeyStroke{tcell.KeyF11, 0}
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keyNames["f12"] = KeyStroke{tcell.KeyF12, 0}
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keyNames["f13"] = KeyStroke{tcell.KeyF13, 0}
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keyNames["f14"] = KeyStroke{tcell.KeyF14, 0}
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keyNames["f15"] = KeyStroke{tcell.KeyF15, 0}
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keyNames["f16"] = KeyStroke{tcell.KeyF16, 0}
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keyNames["f17"] = KeyStroke{tcell.KeyF17, 0}
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keyNames["f18"] = KeyStroke{tcell.KeyF18, 0}
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keyNames["f19"] = KeyStroke{tcell.KeyF19, 0}
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keyNames["f20"] = KeyStroke{tcell.KeyF20, 0}
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keyNames["f21"] = KeyStroke{tcell.KeyF21, 0}
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keyNames["f22"] = KeyStroke{tcell.KeyF22, 0}
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keyNames["f23"] = KeyStroke{tcell.KeyF23, 0}
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keyNames["f24"] = KeyStroke{tcell.KeyF24, 0}
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keyNames["f25"] = KeyStroke{tcell.KeyF25, 0}
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keyNames["f26"] = KeyStroke{tcell.KeyF26, 0}
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keyNames["f27"] = KeyStroke{tcell.KeyF27, 0}
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keyNames["f28"] = KeyStroke{tcell.KeyF28, 0}
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keyNames["f29"] = KeyStroke{tcell.KeyF29, 0}
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keyNames["f30"] = KeyStroke{tcell.KeyF30, 0}
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keyNames["f31"] = KeyStroke{tcell.KeyF31, 0}
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keyNames["f32"] = KeyStroke{tcell.KeyF32, 0}
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keyNames["f33"] = KeyStroke{tcell.KeyF33, 0}
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keyNames["f34"] = KeyStroke{tcell.KeyF34, 0}
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keyNames["f35"] = KeyStroke{tcell.KeyF35, 0}
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keyNames["f36"] = KeyStroke{tcell.KeyF36, 0}
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keyNames["f37"] = KeyStroke{tcell.KeyF37, 0}
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keyNames["f38"] = KeyStroke{tcell.KeyF38, 0}
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keyNames["f39"] = KeyStroke{tcell.KeyF39, 0}
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keyNames["f40"] = KeyStroke{tcell.KeyF40, 0}
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keyNames["f41"] = KeyStroke{tcell.KeyF41, 0}
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keyNames["f42"] = KeyStroke{tcell.KeyF42, 0}
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keyNames["f43"] = KeyStroke{tcell.KeyF43, 0}
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keyNames["f44"] = KeyStroke{tcell.KeyF44, 0}
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keyNames["f45"] = KeyStroke{tcell.KeyF45, 0}
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keyNames["f46"] = KeyStroke{tcell.KeyF46, 0}
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keyNames["f47"] = KeyStroke{tcell.KeyF47, 0}
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keyNames["f48"] = KeyStroke{tcell.KeyF48, 0}
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keyNames["f49"] = KeyStroke{tcell.KeyF49, 0}
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keyNames["f50"] = KeyStroke{tcell.KeyF50, 0}
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keyNames["f51"] = KeyStroke{tcell.KeyF51, 0}
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keyNames["f52"] = KeyStroke{tcell.KeyF52, 0}
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keyNames["f53"] = KeyStroke{tcell.KeyF53, 0}
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keyNames["f54"] = KeyStroke{tcell.KeyF54, 0}
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keyNames["f55"] = KeyStroke{tcell.KeyF55, 0}
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keyNames["f56"] = KeyStroke{tcell.KeyF56, 0}
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keyNames["f57"] = KeyStroke{tcell.KeyF57, 0}
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keyNames["f58"] = KeyStroke{tcell.KeyF58, 0}
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keyNames["f59"] = KeyStroke{tcell.KeyF59, 0}
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keyNames["f60"] = KeyStroke{tcell.KeyF60, 0}
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keyNames["f61"] = KeyStroke{tcell.KeyF61, 0}
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keyNames["f62"] = KeyStroke{tcell.KeyF62, 0}
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keyNames["f63"] = KeyStroke{tcell.KeyF63, 0}
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keyNames["f64"] = KeyStroke{tcell.KeyF64, 0}
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keyNames["c-space"] = KeyStroke{tcell.KeyCtrlSpace, 0}
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keyNames["c-a"] = KeyStroke{tcell.KeyCtrlA, 0}
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keyNames["c-b"] = KeyStroke{tcell.KeyCtrlB, 0}
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keyNames["c-c"] = KeyStroke{tcell.KeyCtrlC, 0}
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keyNames["c-d"] = KeyStroke{tcell.KeyCtrlD, 0}
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keyNames["c-e"] = KeyStroke{tcell.KeyCtrlE, 0}
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keyNames["c-f"] = KeyStroke{tcell.KeyCtrlF, 0}
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keyNames["c-g"] = KeyStroke{tcell.KeyCtrlG, 0}
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keyNames["c-h"] = KeyStroke{tcell.KeyCtrlH, 0}
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keyNames["c-i"] = KeyStroke{tcell.KeyCtrlI, 0}
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keyNames["c-j"] = KeyStroke{tcell.KeyCtrlJ, 0}
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keyNames["c-k"] = KeyStroke{tcell.KeyCtrlK, 0}
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keyNames["c-l"] = KeyStroke{tcell.KeyCtrlL, 0}
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keyNames["c-m"] = KeyStroke{tcell.KeyCtrlM, 0}
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keyNames["c-n"] = KeyStroke{tcell.KeyCtrlN, 0}
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keyNames["c-o"] = KeyStroke{tcell.KeyCtrlO, 0}
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keyNames["c-p"] = KeyStroke{tcell.KeyCtrlP, 0}
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keyNames["c-q"] = KeyStroke{tcell.KeyCtrlQ, 0}
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keyNames["c-r"] = KeyStroke{tcell.KeyCtrlR, 0}
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keyNames["c-s"] = KeyStroke{tcell.KeyCtrlS, 0}
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keyNames["c-t"] = KeyStroke{tcell.KeyCtrlT, 0}
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keyNames["c-u"] = KeyStroke{tcell.KeyCtrlU, 0}
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keyNames["c-v"] = KeyStroke{tcell.KeyCtrlV, 0}
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keyNames["c-w"] = KeyStroke{tcell.KeyCtrlW, 0}
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keyNames["c-x"] = KeyStroke{tcell.KeyCtrlX, rune(tcell.KeyCAN)}
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keyNames["c-y"] = KeyStroke{tcell.KeyCtrlY, 0} // TODO: runes for the rest
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keyNames["c-z"] = KeyStroke{tcell.KeyCtrlZ, 0}
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keyNames["c-]"] = KeyStroke{tcell.KeyCtrlLeftSq, 0}
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keyNames["c-\\"] = KeyStroke{tcell.KeyCtrlBackslash, 0}
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keyNames["c-["] = KeyStroke{tcell.KeyCtrlRightSq, 0}
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keyNames["c-^"] = KeyStroke{tcell.KeyCtrlCarat, 0}
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keyNames["c-_"] = KeyStroke{tcell.KeyCtrlUnderscore, 0}
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keyNames["nul"] = KeyStroke{tcell.KeyNUL, 0}
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keyNames["soh"] = KeyStroke{tcell.KeySOH, 0}
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keyNames["stx"] = KeyStroke{tcell.KeySTX, 0}
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keyNames["etx"] = KeyStroke{tcell.KeyETX, 0}
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keyNames["eot"] = KeyStroke{tcell.KeyEOT, 0}
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keyNames["enq"] = KeyStroke{tcell.KeyENQ, 0}
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keyNames["ack"] = KeyStroke{tcell.KeyACK, 0}
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keyNames["bel"] = KeyStroke{tcell.KeyBEL, 0}
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keyNames["bs"] = KeyStroke{tcell.KeyBS, 0}
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keyNames["tab"] = KeyStroke{tcell.KeyTAB, 0}
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keyNames["lf"] = KeyStroke{tcell.KeyLF, 0}
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keyNames["vt"] = KeyStroke{tcell.KeyVT, 0}
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keyNames["ff"] = KeyStroke{tcell.KeyFF, 0}
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keyNames["cr"] = KeyStroke{tcell.KeyCR, 0}
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keyNames["so"] = KeyStroke{tcell.KeySO, 0}
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keyNames["si"] = KeyStroke{tcell.KeySI, 0}
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keyNames["dle"] = KeyStroke{tcell.KeyDLE, 0}
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keyNames["dc1"] = KeyStroke{tcell.KeyDC1, 0}
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keyNames["dc2"] = KeyStroke{tcell.KeyDC2, 0}
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keyNames["dc3"] = KeyStroke{tcell.KeyDC3, 0}
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keyNames["dc4"] = KeyStroke{tcell.KeyDC4, 0}
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keyNames["nak"] = KeyStroke{tcell.KeyNAK, 0}
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keyNames["syn"] = KeyStroke{tcell.KeySYN, 0}
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keyNames["etb"] = KeyStroke{tcell.KeyETB, 0}
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keyNames["can"] = KeyStroke{tcell.KeyCAN, 0}
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keyNames["em"] = KeyStroke{tcell.KeyEM, 0}
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keyNames["sub"] = KeyStroke{tcell.KeySUB, 0}
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keyNames["esc"] = KeyStroke{tcell.KeyESC, 0}
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keyNames["fs"] = KeyStroke{tcell.KeyFS, 0}
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keyNames["gs"] = KeyStroke{tcell.KeyGS, 0}
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keyNames["rs"] = KeyStroke{tcell.KeyRS, 0}
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keyNames["us"] = KeyStroke{tcell.KeyUS, 0}
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keyNames["del"] = KeyStroke{tcell.KeyDEL, 0}
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}
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