package config
import (
"bytes"
"errors"
"fmt"
"io"
"os"
"path"
"regexp"
"strings"
"git.sr.ht/~rjarry/aerc/log"
"github.com/gdamore/tcell/v2"
"github.com/go-ini/ini"
)
type BindingConfig struct {
Global *KeyBindings
AccountWizard *KeyBindings
Compose *KeyBindings
ComposeEditor *KeyBindings
ComposeReview *KeyBindings
MessageList *KeyBindings
MessageView *KeyBindings
MessageViewPassthrough *KeyBindings
Terminal *KeyBindings
}
type bindsContextType int
const (
bindsContextFolder bindsContextType = iota
bindsContextAccount
)
type BindingConfigContext struct {
ContextType bindsContextType
Regex *regexp.Regexp
Bindings *KeyBindings
}
type KeyStroke struct {
Modifiers tcell.ModMask
Key tcell.Key
Rune rune
}
type Binding struct {
Output []KeyStroke
Input []KeyStroke
}
type KeyBindings struct {
Bindings []*Binding
// If false, disable global keybindings in this context
Globals bool
// Which key opens the ex line (default is :)
ExKey KeyStroke
// private
contextualBinds []*BindingConfigContext
contextualCounts map[bindsContextType]int
contextualCache map[bindsContextKey]*KeyBindings
}
type bindsContextKey struct {
ctxType bindsContextType
value string
}
const (
BINDING_FOUND = iota
BINDING_INCOMPLETE
BINDING_NOT_FOUND
)
type BindingSearchResult int
func defaultBindsConfig() *BindingConfig {
// These bindings are not configurable
wizard := NewKeyBindings()
wizard.ExKey = KeyStroke{Key: tcell.KeyCtrlE}
wizard.Globals = false
quit, _ := ParseBinding("<C-q>", ":quit<Enter>")
wizard.Add(quit)
return &BindingConfig{
Global: NewKeyBindings(),
AccountWizard: wizard,
Compose: NewKeyBindings(),
ComposeEditor: NewKeyBindings(),
ComposeReview: NewKeyBindings(),
MessageList: NewKeyBindings(),
MessageView: NewKeyBindings(),
MessageViewPassthrough: NewKeyBindings(),
Terminal: NewKeyBindings(),
}
}
var Binds = defaultBindsConfig()
func parseBinds(root string) error {
filename := path.Join(root, "binds.conf")
if _, err := os.Stat(filename); errors.Is(err, os.ErrNotExist) {
fmt.Printf("%s not found, installing the system default\n", filename)
if err := installTemplate(root, "binds.conf"); err != nil {
return err
}
}
log.Debugf("Parsing key bindings configuration from %s", filename)
binds, err := ini.LoadSources(ini.LoadOptions{
KeyValueDelimiters: "=",
}, filename)
if err != nil {
return err
}
baseGroups := map[string]**KeyBindings{
"default": &Binds.Global,
"compose": &Binds.Compose,
"messages": &Binds.MessageList,
"terminal": &Binds.Terminal,
"view": &Binds.MessageView,
"view::passthrough": &Binds.MessageViewPassthrough,
"compose::editor": &Binds.ComposeEditor,
"compose::review": &Binds.ComposeReview,
}
// Base Bindings
for _, sectionName := range binds.SectionStrings() {
// Handle :: delimeter
baseSectionName := strings.ReplaceAll(sectionName, "::", "////")
sections := strings.Split(baseSectionName, ":")
baseOnly := len(sections) == 1
baseSectionName = strings.ReplaceAll(sections[0], "////", "::")
group, ok := baseGroups[strings.ToLower(baseSectionName)]
if !ok {
return errors.New("Unknown keybinding group " + sectionName)
}
if baseOnly {
err = LoadBinds(binds, baseSectionName, group)
if err != nil {
return err
}
}
}
log.Debugf("binds.conf: %#v", Binds)
return nil
}
func LoadBindingSection(sec *ini.Section) (*KeyBindings, error) {
bindings := NewKeyBindings()
for key, value := range sec.KeysHash() {
if key == "$ex" {
strokes, err := ParseKeyStrokes(value)
if err != nil {
return nil, err
}
if len(strokes) != 1 {
return nil, errors.New("Invalid binding")
}
bindings.ExKey = strokes[0]
continue
}
if key == "$noinherit" {
if value == "false" {
continue
}
if value != "true" {
return nil, errors.New("Invalid binding")
}
bindings.Globals = false
continue
}
binding, err := ParseBinding(key, value)
if err != nil {
return nil, err
}
bindings.Add(binding)
}
return bindings, nil
}
func LoadBinds(binds *ini.File, baseName string, baseGroup **KeyBindings) error {
if sec, err := binds.GetSection(baseName); err == nil {
binds, err := LoadBindingSection(sec)
if err != nil {
return err
}
*baseGroup = MergeBindings(binds, *baseGroup)
}
b := *baseGroup
if baseName == "default" {
b.Globals = false
}
for _, sectionName := range binds.SectionStrings() {
if !strings.Contains(sectionName, baseName+":") ||
strings.Contains(sectionName, baseName+"::") {
continue
}
bindSection, err := binds.GetSection(sectionName)
if err != nil {
return err
}
binds, err := LoadBindingSection(bindSection)
if err != nil {
return err
}
if baseName == "default" {
binds.Globals = false
}
contextualBind := BindingConfigContext{
Bindings: binds,
}
var index int
if strings.Contains(sectionName, "=") {
index = strings.Index(sectionName, "=")
value := string(sectionName[index+1:])
contextualBind.Regex, err = regexp.Compile(value)
if err != nil {
return err
}
} else {
return fmt.Errorf("Invalid Bind Context regex in %s", sectionName)
}
switch sectionName[len(baseName)+1 : index] {
case "account":
acctName := sectionName[index+1:]
valid := false
for _, acctConf := range Accounts {
matches := contextualBind.Regex.FindString(acctConf.Name)
if matches != "" {
valid = true
}
}
if !valid {
log.Warnf("binds.conf: unexistent account: %s", acctName)
continue
}
contextualBind.ContextType = bindsContextAccount
case "folder":
// No validation needed. If the folder doesn't exist, the binds
// never get used
contextualBind.ContextType = bindsContextFolder
default:
return fmt.Errorf("Unknown Context Bind Section: %s", sectionName)
}
b.contextualBinds = append(b.contextualBinds, &contextualBind)
b.contextualCounts[contextualBind.ContextType]++
}
return nil
}
func NewKeyBindings() *KeyBindings {
return &KeyBindings{
ExKey: KeyStroke{tcell.ModNone, tcell.KeyRune, ':'},
Globals: true,
contextualCache: make(map[bindsContextKey]*KeyBindings),
contextualCounts: make(map[bindsContextType]int),
}
}
func MergeBindings(bindings ...*KeyBindings) *KeyBindings {
merged := NewKeyBindings()
for _, b := range bindings {
merged.Bindings = append(merged.Bindings, b.Bindings...)
}
merged.ExKey = bindings[0].ExKey
merged.Globals = bindings[0].Globals
return merged
}
func (base *KeyBindings) contextual(
contextType bindsContextType, reg string,
) *KeyBindings {
if base.contextualCounts[contextType] == 0 {
// shortcut if no contextual binds for that type
return base
}
key := bindsContextKey{ctxType: contextType, value: reg}
c, found := base.contextualCache[key]
if found {
return c
}
c = base
for _, contextualBind := range base.contextualBinds {
if contextualBind.ContextType != contextType {
continue
}
if !contextualBind.Regex.Match([]byte(reg)) {
continue
}
c = MergeBindings(contextualBind.Bindings, c)
}
base.contextualCache[key] = c
return c
}
func (bindings *KeyBindings) ForAccount(account string) *KeyBindings {
return bindings.contextual(bindsContextAccount, account)
}
func (bindings *KeyBindings) ForFolder(folder string) *KeyBindings {
return bindings.contextual(bindsContextFolder, folder)
}
func (bindings *KeyBindings) Add(binding *Binding) {
// TODO: Search for conflicts?
bindings.Bindings = append(bindings.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.Bindings {
if len(binding.Input) < len(input) {
continue
}
for i, stroke := range input {
if stroke.Modifiers != binding.Input[i].Modifiers {
goto next
}
if stroke.Key != binding.Input[i].Key {
goto next
}
if stroke.Key == tcell.KeyRune &&
stroke.Rune != binding.Input[i].Rune {
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
}
func (bindings *KeyBindings) GetReverseBindings(output []KeyStroke) [][]KeyStroke {
var inputs [][]KeyStroke
for _, binding := range bindings.Bindings {
if len(binding.Output) != len(output) {
continue
}
for i, stroke := range output {
if stroke.Modifiers != binding.Output[i].Modifiers {
goto next
}
if stroke.Key != binding.Output[i].Key {
goto next
}
if stroke.Key == tcell.KeyRune && stroke.Rune != binding.Output[i].Rune {
goto next
}
}
inputs = append(inputs, binding.Input)
next:
}
return inputs
}
func FormatKeyStrokes(keystrokes []KeyStroke) string {
var sb strings.Builder
for _, stroke := range keystrokes {
s := ""
for name, ks := range keyNames {
if ks.Modifiers == stroke.Modifiers && ks.Key == stroke.Key && ks.Rune == stroke.Rune {
switch name {
case "cr", "c-m":
name = "enter"
case "c-i":
name = "tab"
}
s = fmt.Sprintf("<%s>", name)
break
}
}
if s == "" && stroke.Key == tcell.KeyRune {
s = string(stroke.Rune)
}
sb.WriteString(s)
}
return sb.String()
}
var keyNames = map[string]KeyStroke{
"space": {tcell.ModNone, tcell.KeyRune, ' '},
"semicolon": {tcell.ModNone, tcell.KeyRune, ';'},
"enter": {tcell.ModNone, tcell.KeyEnter, 0},
"c-enter": {tcell.ModCtrl, tcell.KeyEnter, 0},
"a-enter": {tcell.ModAlt, tcell.KeyEnter, 0},
"up": {tcell.ModNone, tcell.KeyUp, 0},
"c-up": {tcell.ModCtrl, tcell.KeyUp, 0},
"a-up": {tcell.ModAlt, tcell.KeyUp, 0},
"down": {tcell.ModNone, tcell.KeyDown, 0},
"c-down": {tcell.ModCtrl, tcell.KeyDown, 0},
"a-down": {tcell.ModAlt, tcell.KeyDown, 0},
"right": {tcell.ModNone, tcell.KeyRight, 0},
"c-right": {tcell.ModCtrl, tcell.KeyRight, 0},
"a-right": {tcell.ModAlt, tcell.KeyRight, 0},
"left": {tcell.ModNone, tcell.KeyLeft, 0},
"c-left": {tcell.ModCtrl, tcell.KeyLeft, 0},
"a-left": {tcell.ModAlt, tcell.KeyLeft, 0},
"upleft": {tcell.ModNone, tcell.KeyUpLeft, 0},
"upright": {tcell.ModNone, tcell.KeyUpRight, 0},
"downleft": {tcell.ModNone, tcell.KeyDownLeft, 0},
"downright": {tcell.ModNone, tcell.KeyDownRight, 0},
"center": {tcell.ModNone, tcell.KeyCenter, 0},
"pgup": {tcell.ModNone, tcell.KeyPgUp, 0},
"c-pgup": {tcell.ModCtrl, tcell.KeyPgUp, 0},
"a-pgup": {tcell.ModAlt, tcell.KeyPgUp, 0},
"pgdn": {tcell.ModNone, tcell.KeyPgDn, 0},
"c-pgdn": {tcell.ModCtrl, tcell.KeyPgDn, 0},
"a-pgdn": {tcell.ModAlt, tcell.KeyPgDn, 0},
"home": {tcell.ModNone, tcell.KeyHome, 0},
"end": {tcell.ModNone, tcell.KeyEnd, 0},
"insert": {tcell.ModNone, tcell.KeyInsert, 0},
"delete": {tcell.ModNone, tcell.KeyDelete, 0},
"backspace": {tcell.ModNone, tcell.KeyBackspace2, 0},
"help": {tcell.ModNone, tcell.KeyHelp, 0},
"exit": {tcell.ModNone, tcell.KeyExit, 0},
"clear": {tcell.ModNone, tcell.KeyClear, 0},
"cancel": {tcell.ModNone, tcell.KeyCancel, 0},
"print": {tcell.ModNone, tcell.KeyPrint, 0},
"pause": {tcell.ModNone, tcell.KeyPause, 0},
"backtab": {tcell.ModNone, tcell.KeyBacktab, 0},
"f1": {tcell.ModNone, tcell.KeyF1, 0},
"f2": {tcell.ModNone, tcell.KeyF2, 0},
"f3": {tcell.ModNone, tcell.KeyF3, 0},
"f4": {tcell.ModNone, tcell.KeyF4, 0},
"f5": {tcell.ModNone, tcell.KeyF5, 0},
"f6": {tcell.ModNone, tcell.KeyF6, 0},
"f7": {tcell.ModNone, tcell.KeyF7, 0},
"f8": {tcell.ModNone, tcell.KeyF8, 0},
"f9": {tcell.ModNone, tcell.KeyF9, 0},
"f10": {tcell.ModNone, tcell.KeyF10, 0},
"f11": {tcell.ModNone, tcell.KeyF11, 0},
"f12": {tcell.ModNone, tcell.KeyF12, 0},
"f13": {tcell.ModNone, tcell.KeyF13, 0},
"f14": {tcell.ModNone, tcell.KeyF14, 0},
"f15": {tcell.ModNone, tcell.KeyF15, 0},
"f16": {tcell.ModNone, tcell.KeyF16, 0},
"f17": {tcell.ModNone, tcell.KeyF17, 0},
"f18": {tcell.ModNone, tcell.KeyF18, 0},
"f19": {tcell.ModNone, tcell.KeyF19, 0},
"f20": {tcell.ModNone, tcell.KeyF20, 0},
"f21": {tcell.ModNone, tcell.KeyF21, 0},
"f22": {tcell.ModNone, tcell.KeyF22, 0},
"f23": {tcell.ModNone, tcell.KeyF23, 0},
"f24": {tcell.ModNone, tcell.KeyF24, 0},
"f25": {tcell.ModNone, tcell.KeyF25, 0},
"f26": {tcell.ModNone, tcell.KeyF26, 0},
"f27": {tcell.ModNone, tcell.KeyF27, 0},
"f28": {tcell.ModNone, tcell.KeyF28, 0},
"f29": {tcell.ModNone, tcell.KeyF29, 0},
"f30": {tcell.ModNone, tcell.KeyF30, 0},
"f31": {tcell.ModNone, tcell.KeyF31, 0},
"f32": {tcell.ModNone, tcell.KeyF32, 0},
"f33": {tcell.ModNone, tcell.KeyF33, 0},
"f34": {tcell.ModNone, tcell.KeyF34, 0},
"f35": {tcell.ModNone, tcell.KeyF35, 0},
"f36": {tcell.ModNone, tcell.KeyF36, 0},
"f37": {tcell.ModNone, tcell.KeyF37, 0},
"f38": {tcell.ModNone, tcell.KeyF38, 0},
"f39": {tcell.ModNone, tcell.KeyF39, 0},
"f40": {tcell.ModNone, tcell.KeyF40, 0},
"f41": {tcell.ModNone, tcell.KeyF41, 0},
"f42": {tcell.ModNone, tcell.KeyF42, 0},
"f43": {tcell.ModNone, tcell.KeyF43, 0},
"f44": {tcell.ModNone, tcell.KeyF44, 0},
"f45": {tcell.ModNone, tcell.KeyF45, 0},
"f46": {tcell.ModNone, tcell.KeyF46, 0},
"f47": {tcell.ModNone, tcell.KeyF47, 0},
"f48": {tcell.ModNone, tcell.KeyF48, 0},
"f49": {tcell.ModNone, tcell.KeyF49, 0},
"f50": {tcell.ModNone, tcell.KeyF50, 0},
"f51": {tcell.ModNone, tcell.KeyF51, 0},
"f52": {tcell.ModNone, tcell.KeyF52, 0},
"f53": {tcell.ModNone, tcell.KeyF53, 0},
"f54": {tcell.ModNone, tcell.KeyF54, 0},
"f55": {tcell.ModNone, tcell.KeyF55, 0},
"f56": {tcell.ModNone, tcell.KeyF56, 0},
"f57": {tcell.ModNone, tcell.KeyF57, 0},
"f58": {tcell.ModNone, tcell.KeyF58, 0},
"f59": {tcell.ModNone, tcell.KeyF59, 0},
"f60": {tcell.ModNone, tcell.KeyF60, 0},
"f61": {tcell.ModNone, tcell.KeyF61, 0},
"f62": {tcell.ModNone, tcell.KeyF62, 0},
"f63": {tcell.ModNone, tcell.KeyF63, 0},
"f64": {tcell.ModNone, tcell.KeyF64, 0},
"c-space": {tcell.ModCtrl, tcell.KeyCtrlSpace, 0},
"c-a": {tcell.ModCtrl, tcell.KeyCtrlA, 0},
"c-b": {tcell.ModCtrl, tcell.KeyCtrlB, 0},
"c-c": {tcell.ModCtrl, tcell.KeyCtrlC, 0},
"c-d": {tcell.ModCtrl, tcell.KeyCtrlD, 0},
"c-e": {tcell.ModCtrl, tcell.KeyCtrlE, 0},
"c-f": {tcell.ModCtrl, tcell.KeyCtrlF, 0},
"c-g": {tcell.ModCtrl, tcell.KeyCtrlG, 0},
"c-h": {tcell.ModNone, tcell.KeyCtrlH, 0},
"c-i": {tcell.ModNone, tcell.KeyCtrlI, 0},
"c-j": {tcell.ModCtrl, tcell.KeyCtrlJ, 0},
"c-k": {tcell.ModCtrl, tcell.KeyCtrlK, 0},
"c-l": {tcell.ModCtrl, tcell.KeyCtrlL, 0},
"c-m": {tcell.ModNone, tcell.KeyCtrlM, 0},
"c-n": {tcell.ModCtrl, tcell.KeyCtrlN, 0},
"c-o": {tcell.ModCtrl, tcell.KeyCtrlO, 0},
"c-p": {tcell.ModCtrl, tcell.KeyCtrlP, 0},
"c-q": {tcell.ModCtrl, tcell.KeyCtrlQ, 0},
"c-r": {tcell.ModCtrl, tcell.KeyCtrlR, 0},
"c-s": {tcell.ModCtrl, tcell.KeyCtrlS, 0},
"c-t": {tcell.ModCtrl, tcell.KeyCtrlT, 0},
"c-u": {tcell.ModCtrl, tcell.KeyCtrlU, 0},
"c-v": {tcell.ModCtrl, tcell.KeyCtrlV, 0},
"c-w": {tcell.ModCtrl, tcell.KeyCtrlW, 0},
"c-x": {tcell.ModCtrl, tcell.KeyCtrlX, rune(tcell.KeyCAN)},
"c-y": {tcell.ModCtrl, tcell.KeyCtrlY, 0}, // TODO: runes for the rest
"c-z": {tcell.ModCtrl, tcell.KeyCtrlZ, 0},
"c-]": {tcell.ModCtrl, tcell.KeyCtrlRightSq, 0},
"c-\\": {tcell.ModCtrl, tcell.KeyCtrlBackslash, 0},
"c-[": {tcell.ModCtrl, tcell.KeyCtrlLeftSq, 0},
"c-^": {tcell.ModCtrl, tcell.KeyCtrlCarat, 0},
"c-_": {tcell.ModCtrl, tcell.KeyCtrlUnderscore, 0},
"a-space": {tcell.ModAlt, tcell.KeyRune, ' '},
"a-a": {tcell.ModAlt, tcell.KeyRune, 'a'},
"a-b": {tcell.ModAlt, tcell.KeyRune, 'b'},
"a-c": {tcell.ModAlt, tcell.KeyRune, 'c'},
"a-d": {tcell.ModAlt, tcell.KeyRune, 'd'},
"a-e": {tcell.ModAlt, tcell.KeyRune, 'e'},
"a-f": {tcell.ModAlt, tcell.KeyRune, 'f'},
"a-g": {tcell.ModAlt, tcell.KeyRune, 'g'},
"a-h": {tcell.ModAlt, tcell.KeyRune, 'h'},
"a-i": {tcell.ModAlt, tcell.KeyRune, 'i'},
"a-j": {tcell.ModAlt, tcell.KeyRune, 'j'},
"a-k": {tcell.ModAlt, tcell.KeyRune, 'k'},
"a-l": {tcell.ModAlt, tcell.KeyRune, 'l'},
"a-m": {tcell.ModAlt, tcell.KeyRune, 'm'},
"a-n": {tcell.ModAlt, tcell.KeyRune, 'n'},
"a-o": {tcell.ModAlt, tcell.KeyRune, 'o'},
"a-p": {tcell.ModAlt, tcell.KeyRune, 'p'},
"a-q": {tcell.ModAlt, tcell.KeyRune, 'q'},
"a-r": {tcell.ModAlt, tcell.KeyRune, 'r'},
"a-s": {tcell.ModAlt, tcell.KeyRune, 's'},
"a-t": {tcell.ModAlt, tcell.KeyRune, 't'},
"a-u": {tcell.ModAlt, tcell.KeyRune, 'u'},
"a-v": {tcell.ModAlt, tcell.KeyRune, 'v'},
"a-w": {tcell.ModAlt, tcell.KeyRune, 'w'},
"a-x": {tcell.ModAlt, tcell.KeyRune, 'x'},
"a-y": {tcell.ModAlt, tcell.KeyRune, 'y'},
"a-z": {tcell.ModAlt, tcell.KeyRune, 'z'},
"a-]": {tcell.ModAlt, tcell.KeyRune, ']'},
"a-\\": {tcell.ModAlt, tcell.KeyRune, '\\'},
"a-[": {tcell.ModAlt, tcell.KeyRune, '['},
"a-^": {tcell.ModAlt, tcell.KeyRune, '^'},
"a-_": {tcell.ModAlt, tcell.KeyRune, '_'},
"nul": {tcell.ModNone, tcell.KeyNUL, 0},
"soh": {tcell.ModNone, tcell.KeySOH, 0},
"stx": {tcell.ModNone, tcell.KeySTX, 0},
"etx": {tcell.ModNone, tcell.KeyETX, 0},
"eot": {tcell.ModNone, tcell.KeyEOT, 0},
"enq": {tcell.ModNone, tcell.KeyENQ, 0},
"ack": {tcell.ModNone, tcell.KeyACK, 0},
"bel": {tcell.ModNone, tcell.KeyBEL, 0},
"bs": {tcell.ModNone, tcell.KeyBS, 0},
"tab": {tcell.ModNone, tcell.KeyTAB, 0},
"lf": {tcell.ModNone, tcell.KeyLF, 0},
"vt": {tcell.ModNone, tcell.KeyVT, 0},
"ff": {tcell.ModNone, tcell.KeyFF, 0},
"cr": {tcell.ModNone, tcell.KeyCR, 0},
"so": {tcell.ModNone, tcell.KeySO, 0},
"si": {tcell.ModNone, tcell.KeySI, 0},
"dle": {tcell.ModNone, tcell.KeyDLE, 0},
"dc1": {tcell.ModNone, tcell.KeyDC1, 0},
"dc2": {tcell.ModNone, tcell.KeyDC2, 0},
"dc3": {tcell.ModNone, tcell.KeyDC3, 0},
"dc4": {tcell.ModNone, tcell.KeyDC4, 0},
"nak": {tcell.ModNone, tcell.KeyNAK, 0},
"syn": {tcell.ModNone, tcell.KeySYN, 0},
"etb": {tcell.ModNone, tcell.KeyETB, 0},
"can": {tcell.ModNone, tcell.KeyCAN, 0},
"em": {tcell.ModNone, tcell.KeyEM, 0},
"sub": {tcell.ModNone, tcell.KeySUB, 0},
"esc": {tcell.ModNone, tcell.KeyESC, 0},
"fs": {tcell.ModNone, tcell.KeyFS, 0},
"gs": {tcell.ModNone, tcell.KeyGS, 0},
"rs": {tcell.ModNone, tcell.KeyRS, 0},
"us": {tcell.ModNone, tcell.KeyUS, 0},
"del": {tcell.ModNone, tcell.KeyDEL, 0},
}
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('>'))
switch {
case err == io.EOF:
return nil, errors.New("Expecting '>'")
case err != nil:
return nil, err
case 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, key)
} else {
return nil, fmt.Errorf("Unknown key '%s'", name)
}
case '>':
return nil, errors.New("Found '>' without '<'")
case '\\':
tok, _, err = buf.ReadRune()
if err == io.EOF {
tok = '\\'
} else if err != nil {
return nil, err
}
fallthrough
default:
strokes = append(strokes, KeyStroke{
Modifiers: tcell.ModNone,
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
}
