Implement :cd command

commands/cd.go

@@ -0,0 +1,35 @@
+package commands
+
+import (
+	"errors"
+
+	"git.sr.ht/~sircmpwn/aerc2/widgets"
+)
+
+var (
+	history map[string]string
+)
+
+func init() {
+	history = make(map[string]string)
+	Register("cd", ChangeDirectory)
+}
+
+func ChangeDirectory(aerc *widgets.Aerc, args []string) error {
+	if len(args) != 2 {
+		return errors.New("Usage: cd <directory>")
+	}
+	acct := aerc.SelectedAccount()
+	previous := acct.Directories().Selected()
+	if args[1] == "-" {
+		if dir, ok := history[acct.Name()]; ok {
+			acct.Directories().Select(dir)
+		} else {
+			return errors.New("No previous directory to return to")
+		}
+	} else {
+		acct.Directories().Select(args[1])
+	}
+	history[acct.Name()] = previous
+	return nil
+}

commands/commands.go

@@ -14,11 +14,10 @@ var (
 	commands map[string]AercCommand
 )
 
-func init() {
-	commands = make(map[string]AercCommand)
-}
-
 func Register(name string, cmd AercCommand) {
+	if commands == nil {
+		commands = make(map[string]AercCommand)
+	}
 	commands[name] = cmd
 }
 

widgets/account.go

@@ -90,6 +90,10 @@ func NewAccountView(conf *config.AccountConfig,
 	return acct
 }
 
+func (acct *AccountView) Name() string {
+	return acct.conf.Name
+}
+
 func (acct *AccountView) Children() []ui.Drawable {
 	return acct.grid.Children()
 }
@@ -173,6 +177,7 @@ func (acct *AccountView) onMessage(msg types.WorkerMessage) {
 	case *types.Done:
 		switch msg.InResponseTo().(type) {
 		case *types.OpenDirectory:
+			acct.msglist.SetStore(nil)
 			acct.worker.PostAction(&types.FetchDirectoryContents{},
 				func(msg types.WorkerMessage) {
 					store := acct.msgStores[acct.dirlist.selected]

widgets/directories.go

@@ -16,6 +16,7 @@ type DirectoryList struct {
 	dirs         []string
 	logger       *log.Logger
 	onInvalidate func(d ui.Drawable)
+	selecting    string
 	selected     string
 	spinner      *Spinner
 	worker       *types.Worker
@@ -58,11 +59,24 @@ func (dirlist *DirectoryList) UpdateList(done func(dirs []string)) {
 }
 
 func (dirlist *DirectoryList) Select(name string) {
-	dirlist.selected = name
+	dirlist.selecting = name
-	dirlist.worker.PostAction(&types.OpenDirectory{Directory: name}, nil)
+	dirlist.worker.PostAction(&types.OpenDirectory{Directory: name},
+		func(msg types.WorkerMessage) {
+			switch msg.(type) {
+			case *types.Error:
+				dirlist.selecting = ""
+			default:
+				dirlist.selected = dirlist.selecting
+			}
+			dirlist.Invalidate()
+		})
 	dirlist.Invalidate()
 }
 
+func (dirlist *DirectoryList) Selected() string {
+	return dirlist.selected
+}
+
 func (dirlist *DirectoryList) OnInvalidate(onInvalidate func(d ui.Drawable)) {
 	dirlist.onInvalidate = onInvalidate
 }