Waybar/src/client.cpp

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#include "client.hpp"
#include <fmt/ostream.h>
#include <spdlog/spdlog.h>
#include <fstream>
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#include <iostream>
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#include "idle-inhibit-unstable-v1-client-protocol.h"
#include "util/clara.hpp"
#include "util/json.hpp"
#include "wlr-layer-shell-unstable-v1-client-protocol.h"
waybar::Client *waybar::Client::inst() {
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static auto c = new Client();
return c;
}
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const std::string waybar::Client::getValidPath(const std::vector<std::string> &paths) const {
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wordexp_t p;
for (const std::string &path : paths) {
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if (wordexp(path.c_str(), &p, 0) == 0) {
if (access(*p.we_wordv, F_OK) == 0) {
std::string result = *p.we_wordv;
wordfree(&p);
return result;
}
wordfree(&p);
}
}
return std::string();
}
void waybar::Client::handleGlobal(void *data, struct wl_registry *registry, uint32_t name,
const char *interface, uint32_t version) {
auto client = static_cast<Client *>(data);
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if (strcmp(interface, zwlr_layer_shell_v1_interface.name) == 0) {
// limit version to a highest supported by the client protocol file
version = std::min<uint32_t>(version, zwlr_layer_shell_v1_interface.version);
client->layer_shell = static_cast<struct zwlr_layer_shell_v1 *>(
wl_registry_bind(registry, name, &zwlr_layer_shell_v1_interface, version));
} else if (strcmp(interface, zxdg_output_manager_v1_interface.name) == 0 &&
version >= ZXDG_OUTPUT_V1_NAME_SINCE_VERSION) {
client->xdg_output_manager = static_cast<struct zxdg_output_manager_v1 *>(wl_registry_bind(
registry, name, &zxdg_output_manager_v1_interface, ZXDG_OUTPUT_V1_NAME_SINCE_VERSION));
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} else if (strcmp(interface, zwp_idle_inhibit_manager_v1_interface.name) == 0) {
client->idle_inhibit_manager = static_cast<struct zwp_idle_inhibit_manager_v1 *>(
wl_registry_bind(registry, name, &zwp_idle_inhibit_manager_v1_interface, 1));
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}
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}
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void waybar::Client::handleGlobalRemove(void * data, struct wl_registry * /*registry*/,
uint32_t name) {
// Nothing here
}
void waybar::Client::handleOutput(struct waybar_output &output) {
static const struct zxdg_output_v1_listener xdgOutputListener = {
.logical_position = [](void *, struct zxdg_output_v1 *, int32_t, int32_t) {},
.logical_size = [](void *, struct zxdg_output_v1 *, int32_t, int32_t) {},
.done = &handleOutputDone,
.name = &handleOutputName,
.description = &handleOutputDescription,
};
// owned by output->monitor; no need to destroy
auto wl_output = gdk_wayland_monitor_get_wl_output(output.monitor->gobj());
output.xdg_output.reset(zxdg_output_manager_v1_get_xdg_output(xdg_output_manager, wl_output));
zxdg_output_v1_add_listener(output.xdg_output.get(), &xdgOutputListener, &output);
}
bool waybar::Client::isValidOutput(const Json::Value &config, struct waybar_output &output) {
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if (config["output"].isArray()) {
for (auto const &output_conf : config["output"]) {
if (output_conf.isString() &&
(output_conf.asString() == output.name || output_conf.asString() == output.identifier)) {
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return true;
}
}
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return false;
} else if (config["output"].isString()) {
auto config_output = config["output"].asString();
if (!config_output.empty()) {
if (config_output.substr(0, 1) == "!") {
return config_output.substr(1) != output.name &&
config_output.substr(1) != output.identifier;
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}
return config_output == output.name || config_output == output.identifier;
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}
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}
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return true;
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}
struct waybar::waybar_output &waybar::Client::getOutput(void *addr) {
auto it = std::find_if(
outputs_.begin(), outputs_.end(), [&addr](const auto &output) { return &output == addr; });
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if (it == outputs_.end()) {
throw std::runtime_error("Unable to find valid output");
}
return *it;
}
std::vector<Json::Value> waybar::Client::getOutputConfigs(struct waybar_output &output) {
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std::vector<Json::Value> configs;
if (config_.isArray()) {
for (auto const &config : config_) {
if (config.isObject() && isValidOutput(config, output)) {
configs.push_back(config);
}
}
} else if (isValidOutput(config_, output)) {
configs.push_back(config_);
}
return configs;
}
void waybar::Client::handleOutputDone(void *data, struct zxdg_output_v1 * /*xdg_output*/) {
auto client = waybar::Client::inst();
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try {
auto &output = client->getOutput(data);
/**
* Multiple .done events may arrive in batch. In this case libwayland would queue
* xdg_output.destroy and dispatch all pending events, triggering this callback several times
* for the same output. .done events can also arrive after that for a scale or position changes.
* We wouldn't want to draw a duplicate bar for each such event either.
*
* All the properties we care about are immutable so it's safe to delete the xdg_output object
* on the first event and use the ptr value to check that the callback was already invoked.
*/
if (output.xdg_output) {
output.xdg_output.reset();
spdlog::debug("Output detection done: {} ({})", output.name, output.identifier);
auto configs = client->getOutputConfigs(output);
if (!configs.empty()) {
for (const auto &config : configs) {
client->bars.emplace_back(std::make_unique<Bar>(&output, config));
}
}
}
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} catch (const std::exception &e) {
std::cerr << e.what() << std::endl;
}
}
void waybar::Client::handleOutputName(void * data, struct zxdg_output_v1 * /*xdg_output*/,
const char *name) {
auto client = waybar::Client::inst();
try {
auto &output = client->getOutput(data);
output.name = name;
} catch (const std::exception &e) {
std::cerr << e.what() << std::endl;
}
}
void waybar::Client::handleOutputDescription(void *data, struct zxdg_output_v1 * /*xdg_output*/,
const char *description) {
auto client = waybar::Client::inst();
try {
auto & output = client->getOutput(data);
const char *open_paren = strrchr(description, '(');
// Description format: "identifier (name)"
size_t identifier_length = open_paren - description;
output.identifier = std::string(description, identifier_length - 1);
} catch (const std::exception &e) {
std::cerr << e.what() << std::endl;
}
}
void waybar::Client::handleMonitorAdded(Glib::RefPtr<Gdk::Monitor> monitor) {
auto &output = outputs_.emplace_back();
output.monitor = monitor;
handleOutput(output);
}
void waybar::Client::handleMonitorRemoved(Glib::RefPtr<Gdk::Monitor> monitor) {
spdlog::debug("Output removed: {} {}", monitor->get_manufacturer(), monitor->get_model());
/* This event can be triggered from wl_display_roundtrip called by GTK or our code.
* Defer destruction of bars for the output to the next iteration of the event loop to avoid
* deleting objects referenced by currently executed code.
*/
Glib::signal_idle().connect_once(
sigc::bind(sigc::mem_fun(*this, &Client::handleDeferredMonitorRemoval), monitor),
Glib::PRIORITY_HIGH_IDLE);
}
void waybar::Client::handleDeferredMonitorRemoval(Glib::RefPtr<Gdk::Monitor> monitor) {
for (auto it = bars.begin(); it != bars.end();) {
if ((*it)->output->monitor == monitor) {
auto output_name = (*it)->output->name;
(*it)->window.hide();
gtk_app->remove_window((*it)->window);
it = bars.erase(it);
spdlog::info("Bar removed from output: {}", output_name);
} else {
++it;
}
}
outputs_.remove_if([&monitor](const auto &output) { return output.monitor == monitor; });
}
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std::tuple<const std::string, const std::string> waybar::Client::getConfigs(
const std::string &config, const std::string &style) const {
auto config_file = config.empty() ? getValidPath({
"$XDG_CONFIG_HOME/waybar/config",
"$HOME/.config/waybar/config",
"$HOME/waybar/config",
"/etc/xdg/waybar/config",
SYSCONFDIR "/xdg/waybar/config",
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"./resources/config",
})
: config;
auto css_file = style.empty() ? getValidPath({
"$XDG_CONFIG_HOME/waybar/style.css",
"$HOME/.config/waybar/style.css",
"$HOME/waybar/style.css",
"/etc/xdg/waybar/style.css",
SYSCONFDIR "/xdg/waybar/style.css",
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"./resources/style.css",
})
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: style;
if (css_file.empty() || config_file.empty()) {
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throw std::runtime_error("Missing required resources files");
}
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spdlog::info("Resources files: {}, {}", config_file, css_file);
return {config_file, css_file};
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}
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auto waybar::Client::setupConfig(const std::string &config_file) -> void {
std::ifstream file(config_file);
if (!file.is_open()) {
throw std::runtime_error("Can't open config file");
}
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std::string str((std::istreambuf_iterator<char>(file)), std::istreambuf_iterator<char>());
util::JsonParser parser;
config_ = parser.parse(str);
}
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auto waybar::Client::setupCss(const std::string &css_file) -> void {
css_provider_ = Gtk::CssProvider::create();
style_context_ = Gtk::StyleContext::create();
// Load our css file, wherever that may be hiding
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if (!css_provider_->load_from_path(css_file)) {
throw std::runtime_error("Can't open style file");
}
// there's always only one screen
style_context_->add_provider_for_screen(
Gdk::Screen::get_default(), css_provider_, GTK_STYLE_PROVIDER_PRIORITY_USER);
}
void waybar::Client::bindInterfaces() {
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registry = wl_display_get_registry(wl_display);
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static const struct wl_registry_listener registry_listener = {
.global = handleGlobal,
.global_remove = handleGlobalRemove,
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};
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wl_registry_add_listener(registry, &registry_listener, this);
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wl_display_roundtrip(wl_display);
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if (layer_shell == nullptr || xdg_output_manager == nullptr) {
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throw std::runtime_error("Failed to acquire required resources.");
}
// add existing outputs and subscribe to updates
for (auto i = 0; i < gdk_display->get_n_monitors(); ++i) {
auto monitor = gdk_display->get_monitor(i);
handleMonitorAdded(monitor);
}
gdk_display->signal_monitor_added().connect(sigc::mem_fun(*this, &Client::handleMonitorAdded));
gdk_display->signal_monitor_removed().connect(
sigc::mem_fun(*this, &Client::handleMonitorRemoved));
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}
int waybar::Client::main(int argc, char *argv[]) {
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bool show_help = false;
bool show_version = false;
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std::string config;
std::string style;
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std::string bar_id;
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std::string log_level;
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auto cli = clara::detail::Help(show_help) |
clara::detail::Opt(show_version)["-v"]["--version"]("Show version") |
clara::detail::Opt(config, "config")["-c"]["--config"]("Config path") |
clara::detail::Opt(style, "style")["-s"]["--style"]("Style path") |
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clara::detail::Opt(
log_level,
"trace|debug|info|warning|error|critical|off")["-l"]["--log-level"]("Log level") |
clara::detail::Opt(bar_id, "id")["-b"]["--bar"]("Bar id");
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auto res = cli.parse(clara::detail::Args(argc, argv));
if (!res) {
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spdlog::error("Error in command line: {}", res.errorMessage());
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return 1;
}
if (show_help) {
std::cout << cli << std::endl;
return 0;
}
if (show_version) {
std::cout << "Waybar v" << VERSION << std::endl;
return 0;
}
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if (!log_level.empty()) {
spdlog::set_level(spdlog::level::from_str(log_level));
}
gtk_app = Gtk::Application::create(
argc, argv, "fr.arouillard.waybar", Gio::APPLICATION_HANDLES_COMMAND_LINE);
gdk_display = Gdk::Display::get_default();
if (!gdk_display) {
throw std::runtime_error("Can't find display");
}
if (!GDK_IS_WAYLAND_DISPLAY(gdk_display->gobj())) {
throw std::runtime_error("Bar need to run under Wayland");
}
wl_display = gdk_wayland_display_get_wl_display(gdk_display->gobj());
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auto [config_file, css_file] = getConfigs(config, style);
setupConfig(config_file);
setupCss(css_file);
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bindInterfaces();
gtk_app->hold();
gtk_app->run();
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bars.clear();
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return 0;
}
void waybar::Client::reset() {
gtk_app->quit();
}