feat(percent): adds a percent class to numeric modules

include/modules/backlight.hpp

@@ -51,6 +51,8 @@ class Backlight : public ALabel {
   const std::string    preferred_device_;
   static constexpr int EPOLL_MAX_EVENTS = 16;
 
+  std::string          old_percent_;
+
   std::optional<BacklightDev> previous_best_;
   std::string                 previous_format_;
 

include/modules/battery.hpp

@@ -43,6 +43,7 @@ class Battery : public ALabel {
   int                   fd_;
   std::vector<int>      wds_;
   std::string           old_status_;
+  std::string           old_capacity_;
 };
 
 }  // namespace waybar::modules

include/modules/cpu.hpp

@@ -23,6 +23,8 @@ class Cpu : public ALabel {
   std::tuple<uint16_t, std::string>       getCpuUsage();
   std::vector<std::tuple<size_t, size_t>> parseCpuinfo();
 
+  std::string                             old_usage_;
+
   std::vector<std::tuple<size_t, size_t>> prev_times_;
   waybar::util::SleeperThread             thread_;
 };

src/modules/backlight.cpp

@@ -179,8 +179,13 @@ auto waybar::modules::Backlight::update() -> void {
     }
 
     const auto percent = best->get_max() == 0 ? 100 : best->get_actual() * 100 / best->get_max();
+    const auto percentClass = "percent" + std::to_string(int(std::ceil(percent/5)*5));
+
     label_.set_markup(fmt::format(
         format_, fmt::arg("percent", std::to_string(percent)), fmt::arg("icon", getIcon(percent))));
+    label_.get_style_context()->remove_class(old_percent_);
+    label_.get_style_context()->add_class(percentClass);
+    old_percent_ = percentClass;
   } else {
     if (!previous_best_.has_value()) {
       return;

src/modules/battery.cpp

@@ -144,8 +144,13 @@ auto waybar::modules::Battery::update() -> void {
   std::transform(status.begin(), status.end(), status.begin(), ::tolower);
   auto format = format_;
   auto state = getState(capacity);
+  auto capacity_class = "percent" + std::to_string(int(std::ceil(capacity/5)*5));
   label_.get_style_context()->remove_class(old_status_);
+  label_.get_style_context()->remove_class(old_capacity_);
   label_.get_style_context()->add_class(status);
+  label_.get_style_context()->add_class(capacity_class);
+  old_capacity_ = capacity_class;
+  std::cout << fmt::format(capacity_class);
   old_status_ = status;
   if (!state.empty() && config_["format-" + status + "-" + state].isString()) {
     format = config_["format-" + status + "-" + state].asString();

src/modules/cpu.cpp

@@ -19,7 +19,11 @@ auto waybar::modules::Cpu::update() -> void {
   if (tooltipEnabled()) {
     label_.set_tooltip_text(tooltip);
   }
+  auto percent_class = "percent" + std::to_string(int(std::ceil(cpu_usage/5)*5));
   label_.set_markup(fmt::format(format_, fmt::arg("load", cpu_load), fmt::arg("usage", cpu_usage)));
+  label_.get_style_context()->remove_class(old_usage_);
+  label_.get_style_context()->add_class(percent_class);
+  old_usage_ = percent_class;
 }
 
 uint16_t waybar::modules::Cpu::getCpuLoad() {