package main import ( "fmt" "io" "strings" "hilbish/util" "github.com/maxlandon/readline" rt "github.com/arnodel/golua/runtime" ) type lineReader struct { rl *readline.Instance } var fileHist *fileHistory var hinter *rt.Closure var highlighter *rt.Closure 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, 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 == nil { return []rune{} } retVal, err := rt.Call1(l.MainThread(), rt.FunctionValue(highlighter), rt.StringValue(string(line)), rt.IntValue(int64(pos))) if err != nil { fmt.Println(err) return []rune{} } hintText := "" if luaStr, ok := retVal.TryString(); ok { hintText = luaStr } return []rune(hintText) } rl.SyntaxHighlighter = func(line []rune) string { if highlighter == nil { return string(line) } retVal, err := rt.Call1(l.MainThread(), rt.FunctionValue(highlighter), rt.StringValue(string(line))) if err != nil { fmt.Println(err) return string(line) } highlighted := "" if luaStr, ok := retVal.TryString(); ok { highlighted = luaStr } return highlighted } rl.TabCompleter = func(line []rune, pos int, _ readline.DelayedTabContext) (string, []*readline.CompletionGroup) { ctx := string(line) 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 { util.ForEach(cmpTbl, func(key rt.Value, val rt.Value) { if key.Type() != rt.IntType && val.Type() != rt.TableType { return } valTbl := val.AsTable() luaCompType := valTbl.Get(rt.StringValue("type")) luaCompItems := valTbl.Get(rt.StringValue("items")) if luaCompType.Type() != rt.StringType && luaCompItems.Type() != rt.TableType { return } items := []string{} itemDescriptions := make(map[string]string) util.ForEach(luaCompItems.AsTable(), func(lkey rt.Value, lval rt.Value) { if keytyp := lkey.Type(); keytyp == rt.StringType { // ['--flag'] = {'description', '--flag-alias'} itemName, ok := lkey.TryString() vlTbl, okk := lval.TryTable() if !ok && !okk { // TODO: error return } items = append(items, itemName) itemDescription, ok := vlTbl.Get(rt.IntValue(1)).TryString() if !ok { // TODO: error return } itemDescriptions[itemName] = itemDescription } else if keytyp == rt.IntType { vlStr, ok := lval.TryString() if !ok { // TODO: error return } items = append(items, vlStr) } else { // TODO: error return } }) var dispType readline.TabDisplayType switch luaCompType.AsString() { 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, p := fileComplete(query, ctx, fields) fcompGroup := []*readline.CompletionGroup{{ TrimSlash: false, NoSpace: true, Suggestions: completions, }} return p, fcompGroup } } 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) SetRightPrompt(p string) { lr.rl.SetRightPrompt(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(rtm *rt.Runtime) *rt.Table { lrLua := map[string]util.LuaExport{ "add": {lr.luaAddHistory, 1, false}, "all": {lr.luaAllHistory, 0, false}, "clear": {lr.luaClearHistory, 0, false}, "get": {lr.luaGetHistory, 1, false}, "size": {lr.luaSize, 0, false}, } mod := rt.NewTable() util.SetExports(rtm, mod, lrLua) return mod } func (lr *lineReader) luaAddHistory(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { if err := c.Check1Arg(); err != nil { return nil, err } cmd, err := c.StringArg(0) if err != nil { return nil, err } lr.AddHistory(cmd) return c.Next(), nil } func (lr *lineReader) luaSize(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { return c.PushingNext1(t.Runtime, rt.IntValue(int64(fileHist.Len()))), nil } func (lr *lineReader) luaGetHistory(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { if err := c.Check1Arg(); err != nil { return nil, err } idx, err := c.IntArg(0) if err != nil { return nil, err } cmd, _ := fileHist.GetLine(int(idx)) return c.PushingNext1(t.Runtime, rt.StringValue(cmd)), nil } func (lr *lineReader) luaAllHistory(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { tbl := rt.NewTable() size := fileHist.Len() for i := 1; i < size; i++ { cmd, _ := fileHist.GetLine(i) tbl.Set(rt.IntValue(int64(i)), rt.StringValue(cmd)) } return c.PushingNext1(t.Runtime, rt.TableValue(tbl)), nil } func (lr *lineReader) luaClearHistory(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { fileHist.clear() return c.Next(), nil }