Hilbish/rl.go

366 lines
8.3 KiB
Go

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:
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 == 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 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) 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
}