feat(config): add keybinds to cycle focus between widgets (#613)

Co-authored-by: Ayyan <ayn2op@gmail.com>

cmd/application.go

@@ -137,6 +137,34 @@ func (a *application) onPagesInputCapture(event *tcell.EventKey) *tcell.EventKey
 	case a.cfg.Keys.FocusMessageInput:
 		a.SetFocus(a.messageInput)
 		return nil
+	case a.cfg.Keys.FocusPrevious:
+		switch a.GetFocus() {
+		case a.guildsTree:
+			a.SetFocus(a.messageInput)
+		case a.messageInput:
+			a.SetFocus(a.messagesList)
+		default: // Handle both a.messagesList and a.flex as well as other edge cases (if there is).
+			if a.flex.GetItemCount() == 2 {
+				a.SetFocus(a.guildsTree)
+			} else { // If there is no guild tree, the correct previous page is message input.
+				a.SetFocus(a.messageInput)
+			}
+		}
+		return nil
+	case a.cfg.Keys.FocusNext:
+		switch a.GetFocus() {
+		case a.guildsTree:
+			a.SetFocus(a.messagesList)
+		case a.messagesList:
+			a.SetFocus(a.messageInput)
+		default: // Handle both a.messageInput and a.flex as well as other edge cases (if there is).
+			if a.flex.GetItemCount() == 2 {
+				a.SetFocus(a.guildsTree)
+			} else { // If there is no guild tree, the correct next page is message input.
+				a.SetFocus(a.messagesList)
+			}
+		}
+		return nil
 	case a.cfg.Keys.Logout:
 		a.quit()
 

internal/config/config.toml

@@ -37,6 +37,9 @@ only_on_ping = true
 focus_guilds_tree = "Ctrl+G"
 focus_messages_list = "Ctrl+T"
 focus_message_input = "Ctrl+Space"
+# Cycle focus between the widgets.
+focus_previous = "Ctrl+H"
+focus_next = "Ctrl+L"
 # Hide/show the guilds tree.
 toggle_guilds_tree = "Ctrl+B"
 quit = "Ctrl+C"

internal/config/keys.go

@@ -12,6 +12,8 @@ type (
 		FocusGuildsTree   string `toml:"focus_guilds_tree"`
 		FocusMessagesList string `toml:"focus_messages_list"`
 		FocusMessageInput string `toml:"focus_message_input"`
+		FocusPrevious     string `toml:"focus_previous"`
+		FocusNext         string `toml:"focus_next"`
 		ToggleGuildsTree  string `toml:"toggle_guilds_tree"`
 
 		GuildsTree   GuildsTreeKeys   `toml:"guilds_tree"`