feat(battery): capacity icons

include/modules/battery.hpp

@@ -19,6 +19,7 @@ namespace waybar::modules {
       auto update() -> void;
       operator Gtk::Widget&();
     private:
+      std::string _getIcon(uint32_t percentage);
       static inline const fs::path _data_dir = "/sys/class/power_supply/";
       std::vector<fs::path> _batteries;
       util::SleeperThread _thread;

resources/config

@@ -14,7 +14,8 @@
         "format": "{}% "
     },
     "battery": {
-        "format": "{}% "
+        "format": "{value}% {icon}",
+        "format-icons": ["", "", "", "", ""]
     },
     "network": {
         "interface": "wlp2s0",

src/modules/battery.cpp

@@ -44,7 +44,8 @@ auto waybar::modules::Battery::update() -> void
     }
     auto format = _config["format"] ? _config["format"].asString() : "{}%";
     auto value = total / _batteries.size();
-    _label.set_text(fmt::format(format, value));
+    _label.set_text(fmt::format(format, fmt::arg("value", value),
+      fmt::arg("icon", _getIcon(value))));
     _label.set_tooltip_text(charging ? "Charging" : "Discharging");
     if (charging)
       _label.get_style_context()->add_class("charging");
@@ -59,6 +60,13 @@ auto waybar::modules::Battery::update() -> void
   }
 }
 
+std::string waybar::modules::Battery::_getIcon(uint32_t percentage)
+{
+  if (!_config["format-icons"] || !_config["format-icons"].isArray()) return "";
+  auto step = 100 / _config["format-icons"].size();
+  return _config["format-icons"][percentage / step].asString();
+}
+
 waybar::modules::Battery::operator Gtk::Widget &()
 {
   return _label;