completion: display descriptions next to choices

Use go-opt v2 new completion API which returns items descriptions along
with their text values.

Display the descriptions after the items separated by two spaces. Wrap
the descriptions in parentheses to better indicate that they are not
part of the completion choices. Limit the description length to 80
characters to avoid display issues.

Add a new style object completion_description in stylesets. By default,
the object will be rendered with a dimmed terminal attribute. Update all
stylesets and documentation accordingly.

Implements: https://todo.sr.ht/~rjarry/aerc/271
Link: https://git.sr.ht/~rjarry/go-opt/commit/ebeb82538395a
Changelog-added: Command completion now displays descriptions next
 to completion items.
Changelog-added: New `completion_description` style object in style
 sets used for rendering completion item descriptions.
Signed-off-by: Robin Jarry <robin@jarry.cc>
Tested-by: Bojan Gabric <bojan@bojangabric.com>
Tested-by: Jason Cox <me@jasoncarloscox.com>
Acked-by: Tim Culverhouse <tim@timculverhouse.com>

1 files changed, 6 insertions, 4 deletions

diff --git a/commands/compose/send.go b/commands/compose/send.go
index aefeaa3c..1e30bd0e 100644
--- a/commands/compose/send.go
+++ b/commands/compose/send.go
@@ -19,6 +19,7 @@ import (
 	"git.sr.ht/~rjarry/aerc/lib/send"
 	"git.sr.ht/~rjarry/aerc/models"
 	"git.sr.ht/~rjarry/aerc/worker/types"
+	"git.sr.ht/~rjarry/go-opt/v2"
 	"github.com/emersion/go-message/mail"
 )
 
@@ -142,12 +143,13 @@ func (s Send) Execute(args []string) error {
 						from, rcpts, tab.Name, s.CopyTo,
 						s.Archive, copyToReplied)
 				}
-			}, func(cmd string) ([]string, string) {
+			}, func(cmd string) ([]opt.Completion, string) {
+				var comps []opt.Completion
 				if cmd == "" {
-					return []string{"y", "n"}, ""
+					comps = append(comps, opt.Completion{Value: "y"})
+					comps = append(comps, opt.Completion{Value: "n"})
 				}
-
-				return nil, ""
+				return comps, ""
 			},
 		)