1 files changed, 56 insertions, 23 deletions

diff --git a/editor/editor.go b/editor/editor.go
index 67f0ab3..87b3eff 100644
--- a/editor/editor.go
+++ b/editor/editor.go
@@ -1,7 +1,11 @@
 package editor
 
 import (
+	"fmt"
+	"os"
+	"os/exec"
 	"path/filepath"
+	"strings"
 	"time"
 
 	"github.com/prodhe/poe/gapbuffer"
@@ -12,49 +16,45 @@ type Editor interface {
 	NewBuffer() (id int64, buf *Buffer)
 	Buffer(id int64) *Buffer
 	Buffers() ([]int64, []*Buffer)
-	Current() *Buffer
 	LoadBuffers(filenames []string)
 	CloseBuffer(id int64)
 	WorkDir() string
 	Len() int
-	Run(cmd string)
+	Edit(bufid int64, cmd string) string
 }
 
 // New returns an empty editor with no buffers loaded.
 func New() Editor {
-	e := &editor{}
+	e := &ed{}
 	e.buffers = map[int64]*Buffer{}
 	e.workdir, _ = filepath.Abs(".")
-	e.initCommands()
 	return e
 }
 
-// editor implements Editor.
-type editor struct {
+// ed implements Editor.
+type ed struct {
 	buffers map[int64]*Buffer
-	current int64 // id ref to current buffer
 	workdir string
 }
 
 // NewBuffer creates an empty buffer and appends it to the editor. Returns the new id and the new buffer.
-func (e *editor) NewBuffer() (id int64, buf *Buffer) {
+func (e *ed) NewBuffer() (id int64, buf *Buffer) {
 	buf = &Buffer{buf: &gapbuffer.Buffer{}}
 	id = e.genBufferID()
 	e.buffers[id] = buf
-	e.current = id
 	return id, buf
 }
 
 // Buffer returns the buffer with given index. Nil if id not found.
-func (e *editor) Buffer(id int64) *Buffer {
+func (e *ed) Buffer(id int64) *Buffer {
 	if _, ok := e.buffers[id]; ok {
-		e.current = id
+		return e.buffers[id]
 	}
-	return e.buffers[id]
+	return nil
 }
 
 // Buffers returns a slice of IDs and a slice of buffers.
-func (e *editor) Buffers() ([]int64, []*Buffer) {
+func (e *ed) Buffers() ([]int64, []*Buffer) {
 	ids := make([]int64, 0, len(e.buffers))
 	bs := make([]*Buffer, 0, len(e.buffers))
 	for i, b := range e.buffers {
@@ -64,23 +64,18 @@ func (e *editor) Buffers() ([]int64, []*Buffer) {
 	return ids, bs
 }
 
-// Current returns the current buffer.
-func (e *editor) Current() *Buffer {
-	return e.buffers[e.current]
-}
-
 // CloseBuffer deletes the given buffer from memory. No warnings. Here be dragons.
-func (e *editor) CloseBuffer(id int64) {
+func (e *ed) CloseBuffer(id int64) {
 	delete(e.buffers, id)
 }
 
 // Len returns number of buffers currently in the editor.
-func (e *editor) Len() int {
+func (e *ed) Len() int {
 	return len(e.buffers)
 }
 
 // WorkDir returns the base working directory of the editor.
-func (e *editor) WorkDir() string {
+func (e *ed) WorkDir() string {
 	if e.workdir == "" {
 		d, _ := filepath.Abs(".")
 		return d
@@ -89,7 +84,7 @@ func (e *editor) WorkDir() string {
 }
 
 // LoadBuffers reads files from disk and loads them into windows. Screen need to be initialized.
-func (e *editor) LoadBuffers(fns []string) {
+func (e *ed) LoadBuffers(fns []string) {
 	// load given filenames and append to buffer list
 	for _, fn := range fns {
 		_, buf := e.NewBuffer()
@@ -102,6 +97,44 @@ func (e *editor) LoadBuffers(fns []string) {
 	}
 }
 
-func (e *editor) genBufferID() int64 {
+func (e *ed) genBufferID() int64 {
 	return time.Now().UnixNano()
 }
+
+func (e *ed) Edit(bufid int64, args string) string {
+	if len(args) < 1 {
+		return ""
+	}
+
+	if _, ok := e.buffers[bufid]; !ok {
+		// no such bufid
+		return ""
+	}
+
+	switch args[0] {
+	case 'f':
+		var names []string
+		for _, buf := range e.buffers {
+			names = append(names, fmt.Sprintf("%s", buf.Name()))
+		}
+		return fmt.Sprintf("buffers:\n%s", strings.Join(names, "\n"))
+	case '!':
+		os.Chdir(e.buffers[bufid].WorkDir())
+		cmd := strings.Split(string(args[1:]), " ")
+		path, err := exec.LookPath(cmd[0])
+		if err != nil { // path not found or not executable
+			//return fmt.Sprintf("cannot execute: %s", cmd[0])
+			return ""
+		}
+		out, err := exec.Command(path, cmd[1:]...).Output()
+		if err != nil {
+			return fmt.Sprintf("error: %s", err)
+			break
+		}
+		outstr := string(out)
+		return outstr
+	}
+
+	// no match
+	return "?"
+}