add format-icons to river/layout

README.md

@@ -6,7 +6,7 @@
 
 #### Current features
 - Sway (Workspaces, Binding mode, Focused window name)
-- River (Mapping mode, Tags, Focused window name)
+- River (Mapping mode, Tags, Focused window name, Layout)
 - Hyprland (Window Icons, Workspaces, Focused window name)
 - Niri (Workspaces, Focused window name, Language)
 - DWL (Tags, Focused window name) [requires dwl ipc patch](https://github.com/djpohly/dwl/wiki/ipc)

man/waybar-river-layout.5.scd

@@ -16,9 +16,13 @@ Addressed by *river/layout*
 
 *format*: ++
 	typeof: string ++
-	default: {} ++
+	default: {layout} ++
 	The format, how information should be displayed. On {} data gets inserted.
 
+*format-icons*: ++
+	typeof: array ++
+	Based on the current layout, the corresponding icon gets selected.
+
 *rotate*: ++
 	typeof: integer ++
 	Positive value to rotate the text label (in 90 degree increments).
@@ -64,21 +68,44 @@ Addressed by *river/layout*
 	typeof: array ++
 	The actions corresponding to the buttons of the menu.
 
-# EXAMPLE
+# FORMAT REPLACEMENTS
+
+*{layout}*: Layout, as defined by your layout generator. By default this will be *rivertile(1)*
+
+*{icon}*: Icon, as defined in *format-icons*
+
+# EXAMPLES
+
+With layout name:
 
 ```
 "river/layout": {
-	"format": "{}",
+	"format": "{layout}",
 	"min-length": 4,
 	"align": "right"
 }
 ```
 
+With icons, this sets icons for the 4 layouts available in rivertile:
+
+```
+"river/layout": {
+	"format": "{icon}",
+	"min-length": 3,
+	"format-icons": {
+		"left": "[]=",
+		"bottom": "TTT",
+		"top": "ꓕꓕꓕ",
+		"right": "=[]",
+	}
+}
+```
+
 # STYLE
 
 - *#layout*
 - *#layout.focused* Applied when the output this module's bar belongs to is focused.
 
 # SEE ALSO
 
-waybar(5), river(1)
+waybar(5), river(1), rivertile(1)

src/modules/river/layout.cpp

@@ -146,7 +146,9 @@ void Layout::handle_name(const char *name) {
     label_.hide();  // hide empty labels or labels with empty format
   } else {
     label_.show();
-    label_.set_markup(fmt::format(fmt::runtime(format_), Glib::Markup::escape_text(name).raw()));
+    std::string escaped_name=Glib::Markup::escape_text(name).raw();
+    label_.set_markup(fmt::format(fmt::runtime(format_), fmt::arg("layout", name),
+                                  fmt::arg("icon", getIcon(0, name))));
   }
   ALabel::update();
 }