Terminal plugin callback support

cmd/micro/initlua.go

@@ -85,6 +85,8 @@ func luaImportMicroShell() *lua.LTable {
 	ulua.L.SetField(pkg, "JobSpawn", luar.New(ulua.L, shell.JobSpawn))
 	ulua.L.SetField(pkg, "JobStop", luar.New(ulua.L, shell.JobStop))
 	ulua.L.SetField(pkg, "JobSend", luar.New(ulua.L, shell.JobSend))
+	ulua.L.SetField(pkg, "RunTermEmulator", luar.New(ulua.L, action.RunTermEmulator))
+	ulua.L.SetField(pkg, "TermEmuSupported", luar.New(ulua.L, action.TermEmuSupported))
 
 	return pkg
 }
@@ -106,6 +108,9 @@ func luaImportMicroBuffer() *lua.LTable {
 	ulua.L.SetField(pkg, "BTScratch", luar.New(ulua.L, buffer.BTScratch.Kind))
 	ulua.L.SetField(pkg, "BTRaw", luar.New(ulua.L, buffer.BTRaw.Kind))
 	ulua.L.SetField(pkg, "BTInfo", luar.New(ulua.L, buffer.BTInfo.Kind))
+	ulua.L.SetField(pkg, "NewBufferFromFile", luar.New(ulua.L, func(path string) (*buffer.Buffer, error) {
+		return buffer.NewBufferFromFile(path, buffer.BTDefault)
+	}))
 
 	return pkg
 }

cmd/micro/micro.go

@@ -236,6 +236,7 @@ func main() {
 			for _, b := range buffer.OpenBuffers {
 				b.Save()
 			}
+		case <-shell.CloseTerms:
 		case event = <-events:
 		case <-screen.DrawChan:
 		}

internal/action/bufpane.go

@@ -30,8 +30,14 @@ func init() {
 
 func LuaAction(fn string) func(*BufPane) bool {
 	luaFn := strings.Split(fn, ".")
+	if len(luaFn) <= 1 {
+		return nil
+	}
 	plName, plFn := luaFn[0], luaFn[1]
 	pl := config.FindPlugin(plName)
+	if pl == nil {
+		return nil
+	}
 	return func(h *BufPane) bool {
 		val, err := pl.Call(plFn, luar.New(ulua.L, h))
 		if err != nil {

internal/action/command.go

@@ -78,8 +78,14 @@ func LuaMakeCommand(name, function string, completer buffer.Completer) {
 // so that a command can be bound to a lua function
 func LuaFunctionCommand(fn string) func(*BufPane, []string) {
 	luaFn := strings.Split(fn, ".")
+	if len(luaFn) <= 1 {
+		return nil
+	}
 	plName, plFn := luaFn[0], luaFn[1]
 	pl := config.FindPlugin(plName)
+	if pl == nil {
+		return nil
+	}
 	return func(bp *BufPane, args []string) {
 		var luaArgs []lua.LValue
 		luaArgs = append(luaArgs, luar.New(ulua.L, bp))
@@ -872,9 +878,8 @@ func (h *BufPane) TermCmd(args []string) {
 	}
 
 	term := func(i int, newtab bool) {
-
 		t := new(shell.Terminal)
-		t.Start(args, false, true)
+		t.Start(args, false, true, "", nil)
 
 		id := h.ID()
 		if newtab {

internal/action/terminal_supported.go

@@ -0,0 +1,30 @@
+// +build linux darwin dragonfly openbsd_amd64 freebsd
+
+package action
+
+import (
+	"github.com/zyedidia/micro/internal/shell"
+	"github.com/zyedidia/micro/pkg/shellwords"
+)
+
+const TermEmuSupported = true
+
+func RunTermEmulator(h *BufPane, input string, wait bool, getOutput bool, callback string, userargs []interface{}) error {
+	args, err := shellwords.Split(input)
+	if err != nil {
+		return err
+	}
+
+	t := new(shell.Terminal)
+	t.Start(args, getOutput, wait, callback, userargs)
+
+	id := h.ID()
+	h.AddTab()
+	id = MainTab().Panes[0].ID()
+
+	v := h.GetView()
+	MainTab().Panes[0] = NewTermPane(v.X, v.Y, v.Width, v.Height, t, id)
+	MainTab().SetActive(0)
+
+	return nil
+}

internal/action/terminal_unsupported.go

@@ -0,0 +1,11 @@
+// +build !linux,!darwin,!freebsd,!dragonfly,!openbsd_amd64
+
+package action
+
+import "errors"
+
+const TermEmuSupported = false
+
+func RunTermEmulator(input string, wait bool, getOutput bool, callback string, userargs []interface{}) error {
+	return errors.New("Unsupported operating system")
+}

internal/action/termpane.go

@@ -80,9 +80,9 @@ func (t *TermPane) HandleEvent(event tcell.Event) {
 		} else if t.Status != shell.TTDone {
 			t.WriteString(event.EscSeq())
 		}
-	} else if e, ok := event.(*tcell.EventMouse); !ok || t.State.Mode(terminal.ModeMouseMask) {
+	} else if e, ok := event.(*tcell.EventMouse); e != nil && (!ok || t.State.Mode(terminal.ModeMouseMask)) {
 		t.WriteString(event.EscSeq())
-	} else {
+	} else if e != nil {
 		x, y := e.Position()
 		v := t.GetView()
 		x -= v.X
@@ -109,6 +109,10 @@ func (t *TermPane) HandleEvent(event tcell.Event) {
 			t.mouseReleased = true
 		}
 	}
+
+	if t.Status == shell.TTClose {
+		t.Quit()
+	}
 }
 
 func (t *TermPane) HandleCommand(input string) {

internal/display/statusline.go

@@ -53,8 +53,14 @@ var statusInfo = map[string]func(*buffer.Buffer) string{
 
 func SetStatusInfoFnLua(s string, fn string) {
 	luaFn := strings.Split(fn, ".")
+	if len(luaFn) <= 1 {
+		return
+	}
 	plName, plFn := luaFn[0], luaFn[1]
 	pl := config.FindPlugin(plName)
+	if pl == nil {
+		return
+	}
 	statusInfo[s] = func(b *buffer.Buffer) string {
 		if pl == nil || !pl.IsEnabled() {
 			return ""

internal/shell/job.go

@@ -106,8 +106,14 @@ func JobSend(cmd *exec.Cmd, data string) {
 // to the lua function
 func luaFunctionJob(fn string) func(string, ...interface{}) {
 	luaFn := strings.Split(fn, ".")
+	if len(luaFn) <= 1 {
+		return nil
+	}
 	plName, plFn := luaFn[0], luaFn[1]
 	pl := config.FindPlugin(plName)
+	if pl == nil {
+		return nil
+	}
 	return func(output string, args ...interface{}) {
 		var luaArgs []lua.LValue
 		luaArgs = append(luaArgs, luar.New(ulua.L, output))

internal/shell/terminal.go

@@ -6,13 +6,19 @@ import (
 	"os"
 	"os/exec"
 	"strconv"
+	"strings"
 
+	lua "github.com/yuin/gopher-lua"
 	"github.com/zyedidia/micro/internal/buffer"
+	"github.com/zyedidia/micro/internal/config"
+	ulua "github.com/zyedidia/micro/internal/lua"
 	"github.com/zyedidia/micro/internal/screen"
 	"github.com/zyedidia/terminal"
+	luar "layeh.com/gopher-luar"
 )
 
 type TermType int
+type CallbackFunc func(string)
 
 const (
 	TTClose   = iota // Should be closed
@@ -20,6 +26,12 @@ const (
 	TTDone           // Finished running a command
 )
 
+var CloseTerms chan bool
+
+func init() {
+	CloseTerms = make(chan bool)
+}
+
 // A Terminal holds information for the terminal emulator
 type Terminal struct {
 	State     terminal.State
@@ -30,7 +42,7 @@ type Terminal struct {
 	wait      bool
 	getOutput bool
 	output    *bytes.Buffer
-	callback  string
+	callback  CallbackFunc
 }
 
 // HasSelection returns whether this terminal has a valid selection
@@ -64,7 +76,7 @@ func (t *Terminal) GetSelection(width int) string {
 }
 
 // Start begins a new command in this terminal with a given view
-func (t *Terminal) Start(execCmd []string, getOutput bool, wait bool) error {
+func (t *Terminal) Start(execCmd []string, getOutput bool, wait bool, callback string, userargs []interface{}) error {
 	if len(execCmd) <= 0 {
 		return nil
 	}
@@ -84,6 +96,25 @@ func (t *Terminal) Start(execCmd []string, getOutput bool, wait bool) error {
 	t.title = execCmd[0] + ":" + strconv.Itoa(cmd.Process.Pid)
 	t.wait = wait
 
+	luaFn := strings.Split(callback, ".")
+	if len(luaFn) >= 2 {
+		plName, plFn := luaFn[0], luaFn[1]
+		pl := config.FindPlugin(plName)
+		if pl != nil {
+			t.callback = func(out string) {
+				var luaArgs []lua.LValue
+				luaArgs = append(luaArgs, luar.New(ulua.L, out))
+				for _, v := range userargs {
+					luaArgs = append(luaArgs, luar.New(ulua.L, v))
+				}
+				_, err := pl.Call(plFn, luaArgs...)
+				if err != nil {
+					screen.TermMessage(err)
+				}
+			}
+		}
+	}
+
 	go func() {
 		for {
 			err := Term.Parse()
@@ -108,6 +139,7 @@ func (t *Terminal) Stop() {
 		t.Status = TTDone
 	} else {
 		t.Close()
+		CloseTerms <- true
 	}
 }
 
@@ -117,11 +149,9 @@ func (t *Terminal) Close() {
 	t.Status = TTClose
 	// call the lua function that the user has given as a callback
 	if t.getOutput {
-		// TODO: plugin callback on Term emulator
-		// _, err := Call(t.callback, t.output.String())
-		// if err != nil && !strings.HasPrefix(err.Error(), "function does not exist") {
-		// 	TermMessage(err)
-		// }
+		if t.callback != nil {
+			t.callback(t.output.String())
+		}
 	}
 }