Start GPS module

include/modules/gps.hpp

@@ -0,0 +1,31 @@
+#pragma once
+
+#include <fmt/format.h>
+#include <sys/statvfs.h>
+
+#include <fstream>
+#include <gps.h>
+
+#include "ALabel.hpp"
+#include "util/format.hpp"
+#include "util/sleeper_thread.hpp"
+
+namespace waybar::modules {
+
+  class Gps : public ALabel {
+  public:
+    Gps(const std::string&, const Json::Value&);
+    virtual ~Gps();
+    auto update() -> void override;
+
+  private:
+    const int getFixState() const;
+    const std::string getFixStateName() const;
+    const std::string getFixStateString() const;
+
+    util::SleeperThread thread_;
+    gps_data_t gps_data_;
+    std::string state_;
+  };
+
+}  // namespace waybar::modules

man/waybar-gps.5.scd

@@ -0,0 +1,41 @@
+waybar-gps(5) "waybar-gps" "User Manual"
+
+# NAME
+
+waybar - gps module
+
+# DESCRIPTION
+
+*gps* module for gpsd.
+
+
+# FILES
+
+$XDG_CONFIG_HOME/waybar/config ++
+	Per user configuration file
+
+# ADDITIONAL FILES
+
+libgps lives in:
+
+. /usr/lib/libgps.so or /usr/lib64/libgps.so
+. /usr/lib/pkgconfig/libgps.pc or /usr/lib64/pkgconfig/libgps.pc
+. /usr/include/gps
+
+# CONFIGURATION
+
+
+
+# EXAMPLES
+
+```
+"gps": {
+
+},
+```
+# STYLE
+
+- *#gps*
+- *#gps.fix-none* Applied when GPS is present, but there is no fix.
+- *#gps.fix-2d* Applied when there is a 2D fix.
+- *#gps.fix-3d* Applied when there is a 3D fix.

meson.build

@@ -93,6 +93,7 @@ libmpdclient = dependency('libmpdclient', required: get_option('mpd'))
 xkbregistry = dependency('xkbregistry')
 libjack = dependency('jack', required: get_option('jack'))
 libwireplumber = dependency('wireplumber-0.5', required: get_option('wireplumber'))
+libgps = dependency('libgps', required: get_option('gps'))
 
 libsndio = compiler.find_library('sndio', required: get_option('sndio'))
 if libsndio.found()
@@ -497,6 +498,12 @@ if cava.found()
    man_files += files('man/waybar-cava.5.scd')
 endif
 
+if libgps.found()
+   add_project_arguments('-DHAVE_LIBGPS', language: 'cpp')
+   src_files += files('src/modules/gps.cpp')
+   man_files += files('man/waybar-gps.5.scd')
+endif
+
 subdir('protocol')
 
 app_resources = []
@@ -535,7 +542,8 @@ executable(
         libsndio,
         tz_dep,
 		xkbregistry,
-        cava
+        cava,
+        libgps
     ],
     include_directories: inc_dirs,
     install: true,

meson_options.txt

@@ -21,3 +21,4 @@ option('wireplumber', type: 'feature', value: 'auto', description: 'Enable suppo
 option('cava', type: 'feature', value: 'auto', description: 'Enable support for Cava')
 option('niri', type: 'boolean', description: 'Enable support for niri')
 option('login-proxy', type: 'boolean', description: 'Enable interfacing with dbus login interface')
+option('gps', type: 'feature', value: 'auto', description: 'Enable support for gps')

src/factory.cpp

@@ -109,6 +109,9 @@
 #ifdef HAVE_SYSTEMD_MONITOR
 #include "modules/systemd_failed_units.hpp"
 #endif
+#ifdef HAVE_LIBGPS
+#include "modules/gps.hpp"
+#endif
 #include "modules/cffi.hpp"
 #include "modules/custom.hpp"
 #include "modules/image.hpp"
@@ -331,6 +334,11 @@ waybar::AModule* waybar::Factory::makeModule(const std::string& name,
     if (ref == "systemd-failed-units") {
       return new waybar::modules::SystemdFailedUnits(id, config_[name]);
     }
+#endif
+#ifdef HAVE_LIBCAVA
+    if (ref == "gps") {
+      return new waybar::modules::Gps(id, config_[name]);
+    }
 #endif
     if (ref == "temperature") {
       return new waybar::modules::Temperature(id, config_[name]);

src/modules/gps.cpp

@@ -0,0 +1,101 @@
+#include "modules/gps.hpp"
+
+#include <cmath>
+
+// In the 80000 version of fmt library authors decided to optimize imports
+// and moved declarations required for fmt::dynamic_format_arg_store in new
+// header fmt/args.h
+#if (FMT_VERSION >= 80000)
+#include <fmt/args.h>
+#else
+#include <fmt/core.h>
+#endif
+
+namespace {
+  using namespace waybar::util;
+  constexpr const char *DEFAULT_FORMAT = "{status}";
+}  // namespace
+
+
+waybar::modules::Gps::Gps(const std::string& id, const Json::Value& config)
+: ALabel(config, "gps", id, "{}", 30) {
+  thread_ = [this] {
+    dp.emit();
+    thread_.sleep_for(interval_);
+  };
+  // TODO: connect to gpsd socket
+
+  if (0 != gps_open("localhost", "2947", &gps_data_)) {
+    throw std::runtime_error("Can't open gpsd socket");
+  }
+
+}
+
+const int waybar::modules::Gps::getFixState() const {
+0
+}
+
+const std::string waybar::modules::Gps::getFixStateName() const {
+  switch (getFixState()) {
+    case 1:
+      return "fix-2d";
+    case 2:
+      return "fix-3d";
+    default:
+      return "fix-none";
+  }
+}
+
+const std::string waybar::modules::Gps::getFixStateString() const {
+  switch (getFixState()) {
+    case 1:
+      return "2D Fix";
+    case 2:
+      return "3D Fix";
+    default:
+      return "No fix";
+  }
+}
+
+auto waybar::modules::Gps::update() -> void {
+
+  std::string tooltip_format;
+
+  if (!alt_) {
+    auto state = getFixStateName();
+    if (!state_.empty() && label_.get_style_context()->has_class(state_)) {
+      label_.get_style_context()->remove_class(state_);
+    }
+    if (config_["format-" + state].isString()) {
+      default_format_ = config_["format-" + state].asString();
+    } else if (config_["format"].isString()) {
+      default_format_ = config_["format"].asString();
+    } else {
+      default_format_ = DEFAULT_FORMAT;
+    }
+    if (config_["tooltip-format-" + state].isString()) {
+      tooltip_format = config_["tooltip-format-" + state].asString();
+    }
+    if (!label_.get_style_context()->has_class(state)) {
+      label_.get_style_context()->add_class(state);
+    }
+    format_ = default_format_;
+    state_ = state;
+  }
+
+
+  auto format = format_;
+
+  fmt::dynamic_format_arg_store<fmt::format_context> store;
+  store.push_back(fmt::arg("status", getFixStateString()));
+
+  label_.set_markup(fmt::vformat(format, store));
+// Call parent update
+ALabel::update();
+}
+
+waybar::modules::Gps::~Gps() {
+  gps_close(&gps_data_);
+}
+
+