package main import ( "fmt" "io" "strings" "hilbish/util" "github.com/maxlandon/readline" rt "github.com/arnodel/golua/runtime" ) type lineReader struct { rl *readline.Instance fileHist *fileHistory } var hinter *rt.Closure var highlighter *rt.Closure func newLineReader(prompt string, noHist bool) *lineReader { rl := readline.NewInstance() lr := &lineReader{ rl: rl, } // we don't mind hilbish.read rl instances having completion, // but it cant have shared history if !noHist { lr.fileHist = newFileHistory(defaultHistPath) rl.SetHistoryCtrlR("History", &luaHistory{}) 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.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(hinter), 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) { term := rt.NewTerminationWith(l.MainThread().CurrentCont(), 2, false) compHandle := hshMod.Get(rt.StringValue("completion")).AsTable().Get(rt.StringValue("handler")) err := rt.Call(l.MainThread(), compHandle, []rt.Value{rt.StringValue(string(line)), rt.IntValue(int64(pos))}, term) var compGroups []*readline.CompletionGroup if err != nil { return "", compGroups } luaCompGroups := term.Get(0) luaPrefix := term.Get(1) if luaCompGroups.Type() != rt.TableType { return "", compGroups } groups := luaCompGroups.AsTable() // prefix is optional pfx, _ := luaPrefix.TryString() util.ForEach(groups, 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 } compGroups = append(compGroups, &readline.CompletionGroup{ DisplayType: dispType, Descriptions: itemDescriptions, Suggestions: items, TrimSlash: false, NoSpace: true, }) }) return pfx, compGroups } return lr } func (lr *lineReader) Read() (string, error) { hooks.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) { lr.fileHist.Write(cmd) } func (lr *lineReader) ClearInput() { return } func (lr *lineReader) Resize() { return } // #interface history // command history // The history interface deals with command history. // This includes the ability to override functions to change the main // method of saving history. 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 } // #interface history // add(cmd) // Adds a command to the history. // --- @param cmd string 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 } // #interface history // size() // Returns the amount of commands in the history. // --- @returns number func (lr *lineReader) luaSize(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { return c.PushingNext1(t.Runtime, rt.IntValue(int64(lr.fileHist.Len()))), nil } // #interface history // get(idx) // Retrieves a command from the history based on the `idx`. // --- @param idx number 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, _ := lr.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 := lr.fileHist.Len() for i := 1; i < size; i++ { cmd, _ := lr.fileHist.GetLine(i) tbl.Set(rt.IntValue(int64(i)), rt.StringValue(cmd)) } return c.PushingNext1(t.Runtime, rt.TableValue(tbl)), nil } // #interface history // clear() // Deletes all commands from the history. func (lr *lineReader) luaClearHistory(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) { lr.fileHist.clear() return c.Next(), nil }