visual-mode: deselect messages after performing command

In order to better align to vim functionality: deselect visual mode
selections after performing a command on the selection. This patch also
introduces a new command to allow for re-selecting (remarking) the
previous selection set so that commands can be chained together. The
deselection only applies to msg commands that *do not* move the message
from the store (those types of commands already deselect):
- read/unread
- flag/unflag
- modify-labels
- copy
- pipe

Previous usage to mark several messages as read and deselect all:
Vjjj:read<Enter>:unmark -a<Enter>

New usage, similar to vim:
Vjjj:read<Enter>

To chain a command together:
Vjjj:read<Enter>:remark<Enter>{next command}<Enter>

Signed-off-by: Tim Culverhouse <tim@timculverhouse.com>
Acked-by: Robin Jarry <robin@jarry.cc>

commands/msg/copy.go

@@ -59,6 +59,7 @@ func (Copy) Execute(aerc *widgets.Aerc, args []string) error {
 			switch msg := msg.(type) {
 			case *types.Done:
 				aerc.PushStatus("Messages copied.", 10*time.Second)
+				store.ClearVisualMark()
 			case *types.Error:
 				aerc.PushError(msg.Error.Error())
 			}

commands/msg/mark.go

@@ -14,7 +14,7 @@ func init() {
 }
 
 func (Mark) Aliases() []string {
-	return []string{"mark", "unmark"}
+	return []string{"mark", "unmark", "remark"}
 }
 
 func (Mark) Complete(aerc *widgets.Aerc, args []string) []string {
@@ -93,6 +93,12 @@ func (Mark) Execute(aerc *widgets.Aerc, args []string) error {
 			store.Unmark(selected.Uid)
 			return nil
 		}
+	case "remark":
+		if all || visual || toggle {
+			return fmt.Errorf("Usage: :remark")
+		}
+		store.Remark()
+		return nil
 	}
 	return nil // never reached
 }

commands/msg/modify-labels.go

@@ -57,6 +57,7 @@ func (ModifyLabels) Execute(aerc *widgets.Aerc, args []string) error {
 		switch msg := msg.(type) {
 		case *types.Done:
 			aerc.PushStatus("labels updated", 10*time.Second)
+			store.ClearVisualMark()
 		case *types.Error:
 			aerc.PushError(msg.Error.Error())
 		}

commands/msg/pipe.go

@@ -197,7 +197,7 @@ func (Pipe) Execute(aerc *widgets.Aerc, args []string) error {
 			}
 		})
 	}
-
+	provider.Store().ClearVisualMark()
 	return nil
 }
 

commands/msg/read.go

@@ -175,6 +175,7 @@ func (FlagMsg) Execute(aerc *widgets.Aerc, args []string) error {
 		wg.Wait()
 		if success {
 			aerc.PushStatus(actionName+" flag '"+flagName+"' successful", 10*time.Second)
+			store.ClearVisualMark()
 		}
 	}()
 

doc/aerc.1.scd

@@ -384,6 +384,10 @@ message list, the message in the message viewer, etc).
 
 	*-t*: toggle the mark state instead of unmarking a message
 
+*remark*
+	Re-select the last set of marked messages. Can be used to chain commands
+	after a selection has been acted upon
+
 ## MESSAGE COMPOSE COMMANDS
 
 *abort*

lib/msgstore.go

@@ -26,6 +26,7 @@ type MessageStore struct {
 
 	//marking
 	marked         map[uint32]struct{}
+	lastMarked     map[uint32]struct{}
 	visualStartUid uint32
 	visualMarkMode bool
 
@@ -558,6 +559,10 @@ func (store *MessageStore) Unmark(uid uint32) {
 	delete(store.marked, uid)
 }
 
+func (store *MessageStore) Remark() {
+	store.marked = store.lastMarked
+}
+
 // ToggleMark toggles the marked state on a MessageInfo
 func (store *MessageStore) ToggleMark(uid uint32) {
 	if store.visualMarkMode {
@@ -573,6 +578,7 @@ func (store *MessageStore) ToggleMark(uid uint32) {
 
 // resetMark removes the marking from all messages
 func (store *MessageStore) resetMark() {
+	store.lastMarked = store.marked
 	store.marked = make(map[uint32]struct{})
 }