package main import ( "fmt" "io" "strings" "github.com/maxlandon/readline" rt "github.com/arnodel/golua/runtime" ) type lineReader struct { rl *readline.Instance } var fileHist *fileHistory /* var hinter lua.LValue = lua.LNil var highlighter lua.LValue = lua.LNil */ func newLineReader(prompt string, noHist bool) *lineReader { rl := readline.NewInstance() // we don't mind hilbish.read rl instances having completion, // but it cant have shared history if !noHist { fileHist = newFileHistory() rl.SetHistoryCtrlR("History", fileHist) rl.HistoryAutoWrite = false } rl.ShowVimMode = false rl.ViModeCallback = func(mode readline.ViMode) { modeStr := "" switch mode { case readline.VimKeys: modeStr = "normal" case readline.VimInsert: modeStr = "insert" case readline.VimDelete: modeStr = "delete" case readline.VimReplaceOnce: case readline.VimReplaceMany: modeStr = "replace" } setVimMode(modeStr) } rl.ViActionCallback = func(action readline.ViAction, args []string) { actionStr := "" switch action { case readline.VimActionPaste: actionStr = "paste" case readline.VimActionYank: actionStr = "yank" } hooks.Em.Emit("hilbish.vimAction", actionStr, args) } /* rl.HintText = func(line []rune, pos int) []rune { if hinter == lua.LNil { return []rune{} } err := l.CallByParam(lua.P{ Fn: hinter, NRet: 1, Protect: true, }, lua.LString(string(line)), lua.LNumber(pos)) if err != nil { fmt.Println(err) return []rune{} } retVal := l.Get(-1) hintText := "" if luaStr, ok := retVal.(lua.LString); retVal != lua.LNil && ok { hintText = luaStr.String() } return []rune(hintText) } rl.SyntaxHighlighter = func(line []rune) string { if highlighter == lua.LNil { return string(line) } err := l.CallByParam(lua.P{ Fn: highlighter, NRet: 1, Protect: true, }, lua.LString(string(line))) if err != nil { fmt.Println(err) return string(line) } retVal := l.Get(-1) highlighted := "" if luaStr, ok := retVal.(lua.LString); retVal != lua.LNil && ok { highlighted = luaStr.String() } return highlighted } */ rl.TabCompleter = func(line []rune, pos int, _ readline.DelayedTabContext) (string, []*readline.CompletionGroup) { ctx := string(line) var completions []string var compGroup []*readline.CompletionGroup ctx = strings.TrimLeft(ctx, " ") if len(ctx) == 0 { return "", compGroup } fields := strings.Split(ctx, " ") if len(fields) == 0 { return "", compGroup } query := fields[len(fields) - 1] ctx = aliases.Resolve(ctx) if len(fields) == 1 { completions, prefix := binaryComplete(query, ctx, fields) compGroup = append(compGroup, &readline.CompletionGroup{ TrimSlash: false, NoSpace: true, Suggestions: completions, }) return prefix, compGroup } else { if completecb, ok := luaCompletions["command." + fields[0]]; ok { luaFields := rt.NewTable() for i, f := range fields { luaFields.Set(rt.IntValue(int64(i + 1)), rt.StringValue(f)) } // we must keep the holy 80 cols luacompleteTable, err := rt.Call1(l.MainThread(), rt.FunctionValue(completecb), rt.StringValue(query), rt.StringValue(ctx), rt.TableValue(luaFields)) if err != nil { return "", compGroup } /* as an example with git, completion table should be structured like: { { items = { 'add', 'clone', 'init' }, type = 'grid' }, { items = { '-c', '--git-dir' }, type = 'list' } } ^ a table of completion groups. it is the responsibility of the completer to work on subcommands and subcompletions */ if cmpTbl, ok := luacompleteTable.TryTable(); ok { nextVal := rt.NilValue for { next, val, ok := cmpTbl.Next(nextVal) if next == rt.NilValue { break } nextVal = next _, ok = next.TryInt() valTbl, okk := val.TryTable() if !ok || !okk { // TODO: error? break } luaCompType := valTbl.Get(rt.StringValue("type")) luaCompItems := valTbl.Get(rt.StringValue("items")) compType, ok := luaCompType.TryString() compItems, okk := luaCompItems.TryTable() if !ok || !okk { // TODO: error break } var items []string itemDescriptions := make(map[string]string) nxVal := rt.NilValue for { nx, vl, _ := compItems.Next(nxVal) if nx == rt.NilValue { break } nxVal = nx if tstr := nx.Type(); tstr == rt.StringType { // ['--flag'] = {'description', '--flag-alias'} nxStr, ok := nx.TryString() vlTbl, okk := vl.TryTable() if !ok || !okk { // TODO: error continue } items = append(items, nxStr) itemDescription, ok := vlTbl.Get(rt.IntValue(1)).TryString() if !ok { // TODO: error continue } itemDescriptions[nxStr] = itemDescription } else if tstr == rt.IntType { vlStr, okk := vl.TryString() if !okk { // TODO: error continue } items = append(items, vlStr) } else { // TODO: error continue } } var dispType readline.TabDisplayType switch compType { case "grid": dispType = readline.TabDisplayGrid case "list": dispType = readline.TabDisplayList // need special cases, will implement later //case "map": dispType = readline.TabDisplayMap } compGroup = append(compGroup, &readline.CompletionGroup{ DisplayType: dispType, Descriptions: itemDescriptions, Suggestions: items, TrimSlash: false, NoSpace: true, }) } } } if len(compGroup) == 0 { completions = fileComplete(query, ctx, fields) compGroup = append(compGroup, &readline.CompletionGroup{ TrimSlash: false, NoSpace: true, Suggestions: completions, }) } } return "", compGroup } return &lineReader{ rl, } } func (lr *lineReader) Read() (string, error) { hooks.Em.Emit("command.precmd", nil) s, err := lr.rl.Readline() // this is so dumb if err == readline.EOF { fmt.Println("") return "", io.EOF } return s, err // might get another error } func (lr *lineReader) SetPrompt(p string) { halfPrompt := strings.Split(p, "\n") if len(halfPrompt) > 1 { lr.rl.Multiline = true lr.rl.SetPrompt(strings.Join(halfPrompt[:len(halfPrompt) - 1], "\n")) lr.rl.MultilinePrompt = halfPrompt[len(halfPrompt) - 1:][0] } else { lr.rl.Multiline = false lr.rl.MultilinePrompt = "" lr.rl.SetPrompt(p) } if initialized && !running { lr.rl.RefreshPromptInPlace("") } } func (lr *lineReader) AddHistory(cmd string) { fileHist.Write(cmd) } func (lr *lineReader) ClearInput() { return } func (lr *lineReader) Resize() { return } // lua module /* func (lr *lineReader) Loader(L *lua.LState) *lua.LTable { lrLua := map[string]lua.LGFunction{ "add": lr.luaAddHistory, "all": lr.luaAllHistory, "clear": lr.luaClearHistory, "get": lr.luaGetHistory, "size": lr.luaSize, } mod := l.SetFuncs(l.NewTable(), lrLua) return mod } func (lr *lineReader) luaAddHistory(l *lua.LState) int { cmd := l.CheckString(1) lr.AddHistory(cmd) return 0 } func (lr *lineReader) luaSize(L *lua.LState) int { L.Push(lua.LNumber(fileHist.Len())) return 1 } func (lr *lineReader) luaGetHistory(L *lua.LState) int { idx := L.CheckInt(1) cmd, _ := fileHist.GetLine(idx) L.Push(lua.LString(cmd)) return 1 } func (lr *lineReader) luaAllHistory(L *lua.LState) int { tbl := L.NewTable() size := fileHist.Len() for i := 1; i < size; i++ { cmd, _ := fileHist.GetLine(i) tbl.Append(lua.LString(cmd)) } L.Push(tbl) return 1 } func (lr *lineReader) luaClearHistory(l *lua.LState) int { fileHist.clear() return 0 } */