Add GPS module

include/modules/gps.hpp

@@ -0,0 +1,35 @@
+#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 std::string getFixModeName() const;
+    const std::string getFixModeString() const;
+
+    const std::string getFixStatusString() const;
+
+    util::SleeperThread thread_;
+    gps_data_t gps_data_;
+    std::string state_;
+
+    bool hideDisconnected = true;
+    bool hideNoFix = false;
+  };
+
+}  // namespace waybar::modules

man/waybar-gps.5.scd

@@ -0,0 +1,108 @@
+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
+
+*format*: ++
+	typeof: string ++
+	default: {glyph} ++
+	The text format.
+
+*tooltip*: ++
+	typeof: bool ++
+	default: true ++
+	Option to disable tooltip on hover.
+
+*tooltip-format*: ++
+	typeof: string ++
+	default: Games running: {glyph} ++
+	The text format of the tooltip.
+
+*interval*: ++
+	typeof: integer ++
+	default: 5 ++
+	The interval in which the GPS information gets polled (e.g. fix status).
+
+*hide-disconnected*: ++
+	typeof: bool ++
+	default: true ++
+	Defines if the module should be hidden if there is no GPS receiver.
+
+*hide-no-fix*: ++
+	typeof: bool ++
+	default: false ++
+	Defines if the module should be hidden if there is no GPS fix.
+
+# FORMAT REPLACEMENTS
+
+*{mode}*: Fix mode
+
+*{status}*: Technology used for GPS fix. Not all GPS receivers report this.
+
+*{latitude}*: Latitude, decimal degrees. Can be NaN.
+
+*{latitude_error}*: Latitude uncertainty, meters. Can be NaN.
+
+*{longitude}*: Longitude, decimal degrees. Can be NaN.
+
+*{longitude_error}*: Longitude uncertainty, meters. Can be NaN.
+
+*{altitude_hae}*: Altitude, height above ellipsoid, meters. Can be NaN.
+
+*{altitude_msl}*: Longitude, MSL, meters. Can be NaN.
+
+*{altitude_error}*: Altitude uncertainty, meters. Can be NaN.
+
+*{speed}*: Speed over ground, meters/sec. Can be NaN.
+
+*{speed_error}*: Speed uncertainty, meters/sec. Can be NaN.
+
+*{climb}*: Vertical speed, meters/sec. Can be NaN.
+
+*{climb_error}*: Vertical speed uncertainty, meters/sec. Can be NaN.
+
+*{satellites_visible}*: Number of satellites visible from the GPS receiver.
+
+*{satellites_used}*: Number of satellites used for the GPS fix.
+
+# EXAMPLES
+
+```
+"gps": {
+	"format": "{mode}",
+	"format-no-fix": "No fix",
+	"format-fix-3d": "{status}",
+	"tooltip-format": "{mode}",
+	"tooltip-format-no-fix": "{satellites_visible} satellites visible",
+	"tooltip-format-fix-2d": "{satellites_used}/{satellites_visible} satellites used",
+	"tooltip-format-fix-3d": "Altitude: {altitude_hae}m",
+	"hide-disconnected": false
+}
+```
+# 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()
@@ -493,6 +494,12 @@ 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 = []
@@ -531,7 +538,8 @@ executable(
         libsndio,
         tz_dep,
 		xkbregistry,
-        cava
+        cava,
+        libgps
     ],
     include_directories: inc_dirs,
     install: true,

meson_options.txt

@@ -20,3 +20,4 @@ option('jack', type: 'feature', value: 'auto', description: 'Enable support for
 option('wireplumber', type: 'feature', value: 'auto', description: 'Enable support for WirePlumber')
 option('cava', type: 'feature', value: 'auto', description: 'Enable support for Cava')
 option('niri', type: 'boolean', description: 'Enable support for niri')
+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 +1,183 @@
+#include "modules/gps.hpp"
+#include <spdlog/spdlog.h>
+
+#include <cmath>
+#include <cstdio>
+
+// 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 = "{mode}";
+}  // namespace
+
+
+waybar::modules::Gps::Gps(const std::string& id, const Json::Value& config)
+: ALabel(config, "gps", id, "{}", 5) {
+  thread_ = [this] {
+    dp.emit();
+    thread_.sleep_for(interval_);
+  };
+
+  if (0 != gps_open("localhost", "2947", &gps_data_)) {
+    throw std::runtime_error("Can't open gpsd socket");
+  }
+
+  if (config_["hide-disconnected"].isBool()) {
+    hideDisconnected = config_["hide-disconnected"].asBool();
+  }
+
+  if (config_["hide-no-fix"].isBool()) {
+    hideNoFix = config_["hide-no-fix"].asBool();
+  }
+
+  gps_stream(&gps_data_, WATCH_ENABLE, NULL);
+}
+
+const std::string waybar::modules::Gps::getFixModeName() const {
+  switch (gps_data_.fix.mode) {
+    case MODE_NO_FIX:
+      return "fix-none";
+    case MODE_2D:
+      return "fix-2d";
+    case MODE_3D:
+      return "fix-3d";
+    default:
+      return "disconnected";
+  }
+}
+
+const std::string waybar::modules::Gps::getFixModeString() const {
+  switch (gps_data_.fix.mode) {
+    case MODE_NO_FIX:
+      return "No fix";
+    case MODE_2D:
+      return "2D Fix";
+    case MODE_3D:
+      return "3D Fix";
+    default:
+      return "Disconnected";
+  }
+}
+
+const std::string waybar::modules::Gps::getFixStatusString() const {
+  switch (gps_data_.fix.status) {
+    case STATUS_UNK:
+      return "Unknown";
+    case STATUS_GPS:
+      return "GPS";
+    case STATUS_DGPS:
+      return "DGPS";
+    case STATUS_RTK_FIX:
+      return "RTK Fixed";
+    case STATUS_RTK_FLT:
+      return "RTK Float";
+    case STATUS_DR:
+      return "Dead Reckoning";
+    case STATUS_GNSSDR:
+      return "GNSS + Dead Reckoning";
+    case STATUS_TIME:
+      return "Time Only";
+    case STATUS_PPS_FIX:
+      return "PPS Fix";
+    default:
+      return "Unknown";
+  }
+}
+
+auto waybar::modules::Gps::update() -> void {
+  if (gps_read(&gps_data_, NULL, 0) == -1) {
+    throw std::runtime_error("Can't read data from gpsd.");
+  }
+
+  if ((gps_data_.fix.mode == MODE_NOT_SEEN && hideDisconnected) || (gps_data_.fix.mode == MODE_NO_FIX && hideNoFix)) {
+    event_box_.set_visible(false);
+    return;
+  }
+
+  // Show the module
+  if (!event_box_.get_visible()) event_box_.set_visible(true);
+
+  std::string tooltip_format;
+
+  if (!alt_) {
+    auto state = getFixModeName();
+    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("mode", getFixModeString()));
+  store.push_back(fmt::arg("status", getFixStatusString()));
+
+  store.push_back(fmt::arg("latitude", gps_data_.fix.latitude));
+  store.push_back(fmt::arg("latitude_error", gps_data_.fix.epy));
+
+  store.push_back(fmt::arg("longitude", gps_data_.fix.longitude));
+  store.push_back(fmt::arg("longitude_error", gps_data_.fix.epx));
+
+  store.push_back(fmt::arg("altitude_hae", gps_data_.fix.altHAE));
+  store.push_back(fmt::arg("altitude_msl", gps_data_.fix.altMSL));
+  store.push_back(fmt::arg("altitude_error", gps_data_.fix.epv));
+
+  store.push_back(fmt::arg("speed", gps_data_.fix.speed));
+  store.push_back(fmt::arg("speed_error", gps_data_.fix.eps));
+
+  store.push_back(fmt::arg("climb", gps_data_.fix.climb));
+  store.push_back(fmt::arg("climb_error", gps_data_.fix.epc));
+
+  store.push_back(fmt::arg("satellites_used", gps_data_.satellites_used));
+  store.push_back(fmt::arg("satellites_visible", gps_data_.satellites_visible));
+
+  auto text = fmt::vformat(format, store);
+
+   if (tooltipEnabled()) {
+    if (tooltip_format.empty() && config_["tooltip-format"].isString()) {
+      tooltip_format = config_["tooltip-format"].asString();
+    }
+    if (!tooltip_format.empty()) {
+      auto tooltip_text = fmt::vformat(tooltip_format, store);
+      if (label_.get_tooltip_text() != tooltip_text) {
+        label_.set_tooltip_markup(tooltip_text);
+      }
+    } else if (label_.get_tooltip_text() != text) {
+      label_.set_tooltip_markup(text);
+    }
+  }
+  label_.set_markup(text);
+// Call parent update
+ALabel::update();
+}
+
+waybar::modules::Gps::~Gps() {
+  gps_stream(&gps_data_, WATCH_DISABLE, NULL);
+  gps_close(&gps_data_);
+}
+
+