Add display of unread messages in dirlist

Add an onUpdateDirs handler. This is used to invalidate the dirlist and
redraw with the correct number of recent/unread/total messages is shown.

A config option and formatting options are provided.

1 files changed, 8 insertions, 0 deletions

diff --git a/lib/msgstore.go b/lib/msgstore.go
index bbdfa57..2733288 100644
--- a/lib/msgstore.go
+++ b/lib/msgstore.go
@@ -27,6 +27,7 @@ type MessageStore struct {
 
 	// Map of uids we've asked the worker to fetch
 	onUpdate       func(store *MessageStore) // TODO: multiple onUpdate handlers
+	onUpdateDirs   func()
 	pendingBodies  map[uint32]interface{}
 	pendingHeaders map[uint32]interface{}
 	worker         *types.Worker
@@ -234,10 +235,17 @@ func (store *MessageStore) OnUpdate(fn func(store *MessageStore)) {
 	store.onUpdate = fn
 }
 
+func (store *MessageStore) OnUpdateDirs(fn func()) {
+	store.onUpdateDirs = fn
+}
+
 func (store *MessageStore) update() {
 	if store.onUpdate != nil {
 		store.onUpdate(store)
 	}
+	if store.onUpdateDirs != nil {
+		store.onUpdateDirs()
+	}
 }
 
 func (store *MessageStore) Delete(uids []uint32,