threads: add .ThreadUnread to template data

When a thread is folded, it can be useful to know how many unseen
messages lie below the root. For example, one might want to show that
count in the message list:

column-folded = {{if .ThreadFolded \
	}}{{if ne .ThreadUnread 0 \
		}}{{.ThreadUnread | printf "%s/"}}{{ \
	end}}{{ .ThreadCount | printf "%s"}}{{end}}

Add `.ThreadUnread` to the template functions.

Changelog-added: `.ThreadUnread` is now available in templates.
Signed-off-by: inwit <inwit@sindominio.net>
Acked-by: Robin Jarry <robin@jarry.cc>

1 files changed, 8 insertions, 2 deletions

diff --git a/lib/state/templates.go b/lib/state/templates.go
index 92a25b72..e8c50e86 100644
--- a/lib/state/templates.go
+++ b/lib/state/templates.go
@@ -21,7 +21,7 @@ type DataSetter interface {
 	Data() models.TemplateData
 	SetHeaders(*mail.Header, *models.OriginalMail)
 	SetInfo(*models.MessageInfo, int, bool)
-	SetThreading(string, bool, int, bool, bool)
+	SetThreading(string, bool, int, int, bool, bool)
 	SetComposer(Composer)
 	SetAccount(*config.AccountConfig)
 	SetFolder(*models.Directory)
@@ -34,6 +34,7 @@ type ThreadInfo struct {
 	SameSubject bool
 	Prefix      string
 	Count       int
+	Unread      int
 	Folded      bool
 	Context     bool
 }
@@ -88,11 +89,12 @@ func (d *templateData) SetInfo(info *models.MessageInfo, num int, marked bool,
 }
 
 func (d *templateData) SetThreading(prefix string, same bool, count int,
-	folded bool, context bool,
+	unread int, folded bool, context bool,
 ) {
 	d.threadInfo.Prefix = prefix
 	d.threadInfo.SameSubject = same
 	d.threadInfo.Count = count
+	d.threadInfo.Unread = unread
 	d.threadInfo.Folded = folded
 	d.threadInfo.Context = context
 }
@@ -301,6 +303,10 @@ func (d *templateData) ThreadCount() int {
 	return d.threadInfo.Count
 }
 
+func (d *templateData) ThreadUnread() int {
+	return d.threadInfo.Unread
+}
+
 func (d *templateData) ThreadFolded() bool {
 	return d.threadInfo.Folded
 }