Introducce AAppIconLabel class

Implemented for hyprland

src/AAppIconLabel.cpp

@@ -0,0 +1,124 @@
+#include "AAppIconLabel.hpp"
+
+#include <gdkmm/pixbuf.h>
+#include <glibmm/fileutils.h>
+#include <glibmm/keyfile.h>
+#include <glibmm/miscutils.h>
+#include <spdlog/spdlog.h>
+
+#include <filesystem>
+#include <optional>
+
+#include "util/gtk_icon.hpp"
+
+namespace waybar {
+
+AAppIconLabel::AAppIconLabel(const Json::Value& config, const std::string& name,
+                             const std::string& id, const std::string& format, uint16_t interval,
+                             bool ellipsize, bool enable_click, bool enable_scroll)
+    : AIconLabel(config, name, id, format, interval, ellipsize, enable_click, enable_scroll) {
+  // Icon size
+  if (config["icon-size"].isUInt()) {
+    app_icon_size_ = config["icon-size"].asUInt();
+  }
+  image_.set_pixel_size(app_icon_size_);
+}
+
+std::optional<std::string> getDesktopFilePath(const std::string& app_identifier) {
+  const auto data_dirs = Glib::get_system_data_dirs();
+  for (const auto& data_dir : data_dirs) {
+    const auto data_app_dir = data_dir + "applications/";
+    auto desktop_file_path = data_app_dir + app_identifier + ".desktop";
+    if (std::filesystem::exists(desktop_file_path)) {
+      return desktop_file_path;
+    }
+  }
+  return {};
+}
+
+std::optional<Glib::ustring> getIconName(const std::string& app_identifier) {
+  const auto desktop_file_path = getDesktopFilePath(app_identifier);
+  if (!desktop_file_path.has_value()) {
+    // Try some heuristics to find a matching icon
+
+    if (DefaultGtkIconThemeWrapper::has_icon(app_identifier)) {
+      return app_identifier;
+    }
+
+    const auto app_identifier_desktop = app_identifier + "-desktop";
+    if (DefaultGtkIconThemeWrapper::has_icon(app_identifier_desktop)) {
+      return app_identifier_desktop;
+    }
+
+    const auto to_lower = [](const std::string& str) {
+      auto str_cpy = str;
+      std::transform(str_cpy.begin(), str_cpy.end(), str_cpy.begin(),
+                     [](unsigned char c) { return std::tolower(c); });
+      return str;
+    };
+
+    const auto first_space = app_identifier.find_first_of(' ');
+    if (first_space != std::string::npos) {
+      const auto first_word = to_lower(app_identifier.substr(0, first_space));
+      if (DefaultGtkIconThemeWrapper::has_icon(first_word)) {
+        return first_word;
+      }
+    }
+
+    const auto first_dash = app_identifier.find_first_of('-');
+    if (first_dash != std::string::npos) {
+      const auto first_word = to_lower(app_identifier.substr(0, first_dash));
+      if (DefaultGtkIconThemeWrapper::has_icon(first_word)) {
+        return first_word;
+      }
+    }
+
+    return {};
+  }
+
+  try {
+    Glib::KeyFile desktop_file;
+    desktop_file.load_from_file(desktop_file_path.value());
+    return desktop_file.get_string("Desktop Entry", "Icon");
+  } catch (Glib::FileError& error) {
+    spdlog::warn("Error while loading desktop file {}: {}", desktop_file_path.value(),
+                 error.what().c_str());
+  } catch (Glib::KeyFileError& error) {
+    spdlog::warn("Error while loading desktop file {}: {}", desktop_file_path.value(),
+                 error.what().c_str());
+  }
+  return {};
+}
+
+void AAppIconLabel::updateAppIconName(const std::string& app_identifier) {
+  if (!iconEnabled()) {
+    return;
+  }
+
+  const auto icon_name = getIconName(app_identifier);
+  if (icon_name.has_value()) {
+    app_icon_name_ = icon_name.value();
+  } else {
+    app_icon_name_ = "";
+  }
+  update_app_icon_ = true;
+}
+
+void AAppIconLabel::updateAppIcon() {
+  if (update_app_icon_) {
+    update_app_icon_ = false;
+    if (app_icon_name_.empty()) {
+      image_.set_visible(false);
+    } else {
+      image_.set_from_icon_name(app_icon_name_, Gtk::ICON_SIZE_INVALID);
+      image_.set_visible(true);
+    }
+  }
+}
+
+auto AAppIconLabel::update() -> void {
+  updateAppIcon();
+  AIconLabel::update();
+}
+
+}  // namespace waybar