statusline: refactor to make it more customizable

Refactor statusline by clearly separating the rendering part from the
text display. Use printf-like format string for statusline
customization.

Document printf-like format string to customize the statusline.

Allow to completely mute the statusline (except for push notifications)
with a format specifier.

Provide a display mode with unicode icons for the status elements.

Implements: https://todo.sr.ht/~rjarry/aerc/34
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>

1 files changed, 0 insertions, 32 deletions

diff --git a/lib/statusline/folderstate.go b/lib/statusline/folderstate.go
deleted file mode 100644
index ff470b72..00000000
--- a/lib/statusline/folderstate.go
+++ /dev/null
@@ -1,32 +0,0 @@
-package statusline
-
-type folderState struct {
-	Search         string
-	Filter         string
-	FilterActivity string
-	Sorting        string
-
-	Threading string
-}
-
-func (fs *folderState) State() []string {
-	var line []string
-
-	if fs.FilterActivity != "" {
-		line = append(line, fs.FilterActivity)
-	} else {
-		if fs.Filter != "" {
-			line = append(line, fs.Filter)
-		}
-	}
-	if fs.Search != "" {
-		line = append(line, fs.Search)
-	}
-	if fs.Sorting != "" {
-		line = append(line, fs.Sorting)
-	}
-	if fs.Threading != "" {
-		line = append(line, fs.Threading)
-	}
-	return line
-}