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https://github.com/polybar/polybar.git
synced 2024-10-27 05:23:39 -04:00
577 lines
17 KiB
C++
577 lines
17 KiB
C++
#pragma once
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#include <thread>
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#include "common.hpp"
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#include "components/bar.hpp"
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#include "components/config.hpp"
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#include "components/logger.hpp"
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#include "components/signals.hpp"
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#include "components/x11/connection.hpp"
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#include "components/x11/randr.hpp"
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#include "components/x11/tray.hpp"
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#include "components/x11/types.hpp"
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#include "config.hpp"
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#include "utils/command.hpp"
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#include "utils/inotify.hpp"
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#include "utils/process.hpp"
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#include "utils/socket.hpp"
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#include "utils/throttle.hpp"
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#include "modules/backlight.hpp"
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#include "modules/battery.hpp"
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#include "modules/bspwm.hpp"
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#include "modules/counter.hpp"
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#include "modules/cpu.hpp"
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#include "modules/date.hpp"
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#include "modules/memory.hpp"
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#include "modules/menu.hpp"
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#include "modules/script.hpp"
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#include "modules/text.hpp"
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#include "modules/unsupported.hpp"
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#include "modules/xbacklight.hpp"
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#if ENABLE_I3
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#include "modules/i3.hpp"
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#endif
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#if ENABLE_MPD
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#include "modules/mpd.hpp"
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#endif
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#if ENABLE_NETWORK
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#include "modules/network.hpp"
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#endif
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#if ENABLE_ALSA
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#include "modules/volume.hpp"
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#endif
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LEMONBUDDY_NS
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using namespace modules;
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using module_t = unique_ptr<module_interface>;
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class controller {
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public:
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/**
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* Construct controller
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*/
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explicit controller(connection& conn, const logger& logger, const config& config,
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unique_ptr<bar> bar, unique_ptr<traymanager> tray, inotify_watch_t& confwatch)
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: m_connection(conn)
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, m_log(logger)
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, m_conf(config)
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, m_bar(forward<decltype(bar)>(bar))
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, m_traymanager(forward<decltype(tray)>(tray))
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, m_confwatch(confwatch) {}
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/**
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* Stop modules and cleanup X components,
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* threads and spawned processes
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*/
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~controller() noexcept {
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if (!m_mutex.try_lock_for(3s)) {
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m_log.warn("Failed to acquire lock for 3s... Forcing shutdown using SIGKILL");
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raise(SIGKILL);
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}
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std::lock_guard<std::timed_mutex> guard(m_mutex, std::adopt_lock);
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m_log.trace("controller: Stop modules");
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for (auto&& block : m_modules) {
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for (auto&& module : block.second) {
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module->stop();
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}
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}
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if (m_traymanager) {
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m_log.trace("controller: Deactivate tray manager");
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m_traymanager->deactivate();
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}
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m_log.trace("controller: Deconstruct bar instance");
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g_signals::bar::action_click = nullptr;
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m_bar.reset();
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m_log.trace("controller: Interrupt X event loop");
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m_connection.send_dummy_event(m_connection.root());
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if (m_confwatch) {
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try {
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m_log.trace("controller: Remove config watch");
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m_confwatch->remove();
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} catch (const system_error& err) {
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}
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}
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if (!m_threads.empty()) {
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m_log.trace("controller: Join active threads");
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for (auto&& thread : m_threads) {
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if (thread.joinable())
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thread.join();
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}
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}
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m_log.trace("controller: Wait for spawned processes");
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while (process_util::notify_childprocess())
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;
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m_connection.flush();
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}
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/**
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* Setup X environment
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*/
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auto bootstrap(bool to_stdout = false, bool dump_wmname = false) {
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m_stdout = to_stdout;
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m_log.trace("controller: Initialize X atom cache");
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m_connection.preload_atoms();
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m_log.trace("controller: Query X extension data");
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m_connection.query_extensions();
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// const auto& damage_ext = m_connection.extension<xpp::damage::extension>();
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// m_log.trace("controller: Found 'Damage' (first_event: %i, first_error: %i)",
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// damage_ext->first_event, damage_ext->first_error);
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// const auto& render_ext = m_connection.extension<xpp::render::extension>();
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// m_log.trace("controller: Found 'Render' (first_event: %i, first_error: %i)",
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// render_ext->first_event, render_ext->first_error);
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const auto& randr_ext = m_connection.extension<xpp::randr::extension>();
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m_log.trace("controller: Found 'RandR' (first_event: %i, first_error: %i)",
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randr_ext->first_event, randr_ext->first_error);
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// Listen for events on the root window to be able to
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// break the blocking wait call when cleaning up
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m_log.trace("controller: Listen for events on the root window");
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try {
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const uint32_t value_list[1]{XCB_EVENT_MASK_STRUCTURE_NOTIFY};
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m_connection.change_window_attributes_checked(
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m_connection.root(), XCB_CW_EVENT_MASK, value_list);
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} catch (const std::exception& err) {
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throw application_error("Failed to change root window event mask: " + string{err.what()});
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}
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try {
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m_log.trace("controller: Setup bar renderer");
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m_bar->bootstrap(m_stdout || dump_wmname);
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if (dump_wmname) {
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std::cout << m_bar->settings().wmname << std::endl;
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return;
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} else if (!to_stdout) {
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g_signals::bar::action_click = bind(&controller::on_module_click, this, std::placeholders::_1);
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}
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} catch (const std::exception& err) {
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throw application_error("Failed to setup bar renderer: " + string{err.what()});
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}
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try {
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if (m_stdout) {
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m_log.trace("controller: Disabling tray (reason: stdout mode)");
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m_traymanager.reset();
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} else if (m_bar->tray().align == alignment::NONE) {
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m_log.trace("controller: Disabling tray (reason: tray-position)");
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m_traymanager.reset();
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} else {
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m_log.trace("controller: Setup tray manager");
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m_traymanager->bootstrap(m_bar->tray());
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}
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} catch (const std::exception& err) {
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m_log.err(err.what());
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m_log.warn("controller: Disabling tray...");
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m_traymanager.reset();
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}
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m_log.trace("main: Setup bar modules");
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bootstrap_modules();
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// Allow <throttle_limit> ticks within <throttle_ms> timeframe
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const auto throttle_limit = m_conf.get<unsigned int>("settings", "throttle-limit", 3);
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const auto throttle_ms = chrono::duration<double, std::milli>(
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m_conf.get<unsigned int>("settings", "throttle-ms", 60));
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m_throttler = throttle_util::make_throttler(throttle_limit, throttle_ms);
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}
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/**
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* Launch the controller
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*/
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auto run() {
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assert(!m_connection.connection_has_error());
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m_log.info("Starting application...");
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m_running = true;
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install_sigmask();
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install_confwatch();
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m_threads.emplace_back([this] {
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m_connection.flush();
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m_log.trace("controller: Start modules");
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for (auto&& block : m_modules) {
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for (auto&& module : block.second) {
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try {
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module->start();
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} catch (const application_error& err) {
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m_log.err("Failed to start '%s' (reason: %s)", module->name(), err.what());
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}
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// Offset the initial broadcasts by 25ms to
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// avoid the updates from being ignored by the throttler
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this_thread::sleep_for(25ms);
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}
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}
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if (m_stdout) {
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m_log.trace("controller: Ignoring tray manager (reason: stdout mode)");
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m_log.trace("controller: Ignoring X event loop (reason: stdout mode)");
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return;
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}
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if (m_traymanager) {
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try {
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m_log.trace("controller: Activate tray manager");
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m_traymanager->activate();
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} catch (const std::exception& err) {
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m_log.err(err.what());
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m_log.err("controller: Failed to activate tray manager...");
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}
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}
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m_connection.flush();
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m_log.trace("controller: Listen for X events");
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while (m_running) {
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auto evt = m_connection.wait_for_event();
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if (evt != nullptr)
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m_connection.dispatch_event(evt);
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}
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});
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wait();
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m_running = false;
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return !m_reload;
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}
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/**
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* Block execution until a defined signal is raised
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*/
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void wait() {
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m_log.trace("controller: Wait for signal");
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int caught_signal = 0;
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sigwait(&m_waitmask, &caught_signal);
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m_log.warn("Termination signal received, shutting down...");
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m_log.trace("controller: Caught signal %d", caught_signal);
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m_reload = (caught_signal == SIGUSR1);
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}
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protected:
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/**
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* Set signal mask for the current and future threads
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*/
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void install_sigmask() {
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if (!m_running)
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return;
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m_log.trace("controller: Set sigmask for current and future threads");
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sigemptyset(&m_waitmask);
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sigaddset(&m_waitmask, SIGINT);
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sigaddset(&m_waitmask, SIGQUIT);
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sigaddset(&m_waitmask, SIGTERM);
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sigaddset(&m_waitmask, SIGUSR1);
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if (pthread_sigmask(SIG_BLOCK, &m_waitmask, nullptr) == -1)
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throw system_error();
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}
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/**
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* Listen for changes to the config file
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*/
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void install_confwatch() {
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if (!m_running)
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return;
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if (!m_confwatch) {
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m_log.trace("controller: Config watch not set, skip...");
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return;
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}
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m_threads.emplace_back([this] {
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this_thread::sleep_for(1s);
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try {
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if (!m_running)
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return;
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m_log.trace("controller: Attach config watch");
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m_confwatch->attach(IN_MODIFY);
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m_log.trace("controller: Wait for config file inotify event");
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m_confwatch->get_event();
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if (!m_running)
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return;
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m_log.info("Configuration file changed...");
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kill(getpid(), SIGUSR1);
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} catch (const system_error& err) {
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m_log.err(err.what());
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m_log.trace("controller: Reset config watch");
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m_confwatch.reset();
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}
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});
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}
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/**
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* Create and initialize bar modules
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*/
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void bootstrap_modules() {
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m_modules.emplace(alignment::LEFT, vector<module_t>{});
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m_modules.emplace(alignment::CENTER, vector<module_t>{});
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m_modules.emplace(alignment::RIGHT, vector<module_t>{});
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size_t module_count = 0;
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for (auto& block : m_modules) {
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string bs{m_conf.bar_section()};
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string confkey;
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switch (block.first) {
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case alignment::LEFT:
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confkey = "modules-left";
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break;
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case alignment::CENTER:
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confkey = "modules-center";
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break;
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case alignment::RIGHT:
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confkey = "modules-right";
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break;
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default:
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break;
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}
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for (auto& module_name : string_util::split(m_conf.get<string>(bs, confkey, ""), ' ')) {
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auto type = m_conf.get<string>("module/" + module_name, "type");
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auto bar = m_bar->settings();
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auto& modules = block.second;
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if (type == "internal/counter")
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modules.emplace_back(new counter_module(bar, m_log, m_conf, module_name));
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else if (type == "internal/backlight")
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modules.emplace_back(new backlight_module(bar, m_log, m_conf, module_name));
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else if (type == "internal/xbacklight")
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modules.emplace_back(new xbacklight_module(bar, m_log, m_conf, module_name));
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else if (type == "internal/battery")
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modules.emplace_back(new battery_module(bar, m_log, m_conf, module_name));
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else if (type == "internal/bspwm")
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modules.emplace_back(new bspwm_module(bar, m_log, m_conf, module_name));
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else if (type == "internal/cpu")
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modules.emplace_back(new cpu_module(bar, m_log, m_conf, module_name));
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else if (type == "internal/date")
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modules.emplace_back(new date_module(bar, m_log, m_conf, module_name));
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else if (type == "internal/memory")
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modules.emplace_back(new memory_module(bar, m_log, m_conf, module_name));
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else if (type == "internal/i3")
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modules.emplace_back(new i3_module(bar, m_log, m_conf, module_name));
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else if (type == "internal/mpd")
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modules.emplace_back(new mpd_module(bar, m_log, m_conf, module_name));
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else if (type == "internal/volume")
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modules.emplace_back(new volume_module(bar, m_log, m_conf, module_name));
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else if (type == "internal/network")
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modules.emplace_back(new network_module(bar, m_log, m_conf, module_name));
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else if (type == "custom/text")
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modules.emplace_back(new text_module(bar, m_log, m_conf, module_name));
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else if (type == "custom/script")
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modules.emplace_back(new script_module(bar, m_log, m_conf, module_name));
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else if (type == "custom/menu")
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modules.emplace_back(new menu_module(bar, m_log, m_conf, module_name));
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else
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throw application_error("Unknown module: " + module_name);
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auto& module = modules.back();
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module->set_writer(bind(&controller::on_module_update, this, std::placeholders::_1));
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module->set_terminator(bind(&controller::on_module_stop, this, std::placeholders::_1));
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module_count++;
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}
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}
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if (module_count == 0)
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throw application_error("No modules created");
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}
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void on_module_update(string /* module_name */) {
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if (!m_mutex.try_lock_for(50ms)) {
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this_thread::yield();
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return;
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}
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std::lock_guard<std::timed_mutex> guard(m_mutex, std::adopt_lock);
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if (!m_running)
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return;
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if (!m_throttler->passthrough(m_throttle_strategy)) {
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m_log.trace("controller: Update event throttled");
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return;
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}
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string contents{""};
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string separator{m_bar->settings().separator};
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string padding_left(m_bar->settings().padding_left, ' ');
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string padding_right(m_bar->settings().padding_right, ' ');
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auto margin_left = m_bar->settings().module_margin_left;
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auto margin_right = m_bar->settings().module_margin_right;
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for (auto&& block : m_modules) {
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string block_contents;
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for (auto&& module : block.second) {
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auto module_contents = module->contents();
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if (module_contents.empty())
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continue;
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if (!block_contents.empty() && !separator.empty())
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block_contents += separator;
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if (!(block.first == alignment::LEFT && module == block.second.front()))
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block_contents += string(margin_left, ' ');
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block_contents += module->contents();
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if (!(block.first == alignment::RIGHT && module == block.second.back()))
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block_contents += string(margin_right, ' ');
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}
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if (block_contents.empty())
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continue;
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switch (block.first) {
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case alignment::LEFT:
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contents += "%{l}";
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contents += padding_left;
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break;
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case alignment::CENTER:
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contents += "%{c}";
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break;
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case alignment::RIGHT:
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contents += "%{r}";
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block_contents += padding_right;
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break;
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case alignment::NONE:
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break;
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}
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block_contents = string_util::replace_all(block_contents, "B-}%{B#", "B#");
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block_contents = string_util::replace_all(block_contents, "F-}%{F#", "F#");
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block_contents = string_util::replace_all(block_contents, "T-}%{T", "T");
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contents += string_util::replace_all(block_contents, "}%{", " ");
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}
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if (m_stdout)
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std::cout << contents << std::endl;
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else
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m_bar->parse(contents);
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}
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void on_module_stop(string /* module_name */) {
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if (!m_running)
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return;
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for (auto&& block : m_modules) {
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for (auto&& module : block.second) {
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if (module->running())
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return;
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}
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}
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m_log.warn("No running modules, raising SIGTERM");
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kill(getpid(), SIGTERM);
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}
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void on_module_click(string input) {
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if (!m_clickmtx.try_lock()) {
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this_thread::yield();
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return;
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}
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std::lock_guard<std::mutex> guard(m_clickmtx, std::adopt_lock);
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for (auto&& block : m_modules) {
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for (auto&& module : block.second) {
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if (!module->receive_events())
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continue;
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if (module->handle_event(input))
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return;
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}
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}
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m_log.trace("controller: Unrecognized input '%s'", input);
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m_log.trace("controller: Forwarding input to shell");
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auto command = command_util::make_command("/usr/bin/env\nsh\n-c\n" + input);
|
|
|
|
try {
|
|
command->exec(false);
|
|
command->tail([this](std::string output) { m_log.trace("> %s", output); });
|
|
command->wait();
|
|
} catch (const application_error& err) {
|
|
m_log.err(err.what());
|
|
}
|
|
}
|
|
|
|
private:
|
|
connection& m_connection;
|
|
registry m_registry{m_connection};
|
|
const logger& m_log;
|
|
const config& m_conf;
|
|
unique_ptr<bar> m_bar;
|
|
unique_ptr<traymanager> m_traymanager;
|
|
|
|
std::timed_mutex m_mutex;
|
|
std::mutex m_clickmtx;
|
|
|
|
stateflag m_stdout{false};
|
|
stateflag m_running{false};
|
|
stateflag m_reload{false};
|
|
|
|
sigset_t m_waitmask;
|
|
|
|
inotify_watch_t& m_confwatch;
|
|
|
|
vector<thread> m_threads;
|
|
map<alignment, vector<module_t>> m_modules;
|
|
|
|
unique_ptr<throttle_util::event_throttler> m_throttler;
|
|
throttle_util::strategy::try_once_or_leave_yolo m_throttle_strategy;
|
|
};
|
|
|
|
namespace {
|
|
/**
|
|
* Configure injection module
|
|
*/
|
|
template <typename T = unique_ptr<controller>>
|
|
di::injector<T> configure_controller(inotify_watch_t& confwatch) {
|
|
// clang-format off
|
|
return di::make_injector(
|
|
di::bind<controller>().to<controller>(),
|
|
di::bind<>().to(confwatch),
|
|
configure_connection(),
|
|
configure_logger(),
|
|
configure_config(),
|
|
configure_bar(),
|
|
configure_traymanager());
|
|
// clang-format on
|
|
}
|
|
}
|
|
|
|
LEMONBUDDY_NS_END
|