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feat(mpd): Add support for elapsed and total time

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This commit is contained in:
Minijackson 2019-04-18 11:17:08 +02:00
parent 80a12d0238
commit 235997fa73
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2 changed files with 85 additions and 45 deletions
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30
include/modules/mpd.hpp
View File

@ -1,5 +1,6 @@
#pragma once
#include <condition_variable>
#include <thread>
#include <fmt/format.h>
#include <mpd/client.h>
@ -12,20 +13,27 @@ class MPD : public ALabel {
MPD(const std::string&, const Json::Value&);
auto update() -> void;
private:
std::thread worker();
std::thread periodic_updater();
void setLabel();
std::string getStateIcon();
std::string getOptionIcon(std::string optionName, bool activated);
void tryConnect();
void checkErrors();
std::thread event_listener();
// Assumes `connection_lock_` is locked
void tryConnect();
// If checking errors on the main connection, make sure to lock it using
// `connection_lock_` before calling checkErrors
void checkErrors(mpd_connection* conn);
// Assumes `connection_lock_` is locked
void fetchState();
void waitForEvent();
bool handlePlayPause(GdkEventButton* const&);
std::thread worker_;
bool stopped();
bool playing();
using unique_connection = std::unique_ptr<mpd_connection, decltype(&mpd_connection_free)>;
using unique_status = std::unique_ptr<mpd_status, decltype(&mpd_status_free)>;
@ -36,15 +44,21 @@ class MPD : public ALabel {
const char* server_;
const unsigned port_;
// We need a mutex here because we can trigger updates from multiple thread:
// the event based updates, the periodic updates needed for the elapsed time,
// and the click play/pause feature
std::mutex connection_lock_;
unique_connection connection_;
// Use two connections because the main one will be blocking most of the time.
// Used to send play/pause events and poll elapsed time.
// The alternate connection will be used to wait for events: since it will
// be blocking (idle) we can't send commands via this connection
//
// No lock since only used in the event listener thread
unique_connection alternate_connection_;
// Protect them using the `connection_lock_`
unique_status status_;
mpd_state state_;
unique_song song_;
bool stopped_;
};
} // namespace waybar::modules

82
src/modules/mpd.cpp
View File

@ -1,5 +1,7 @@
#include "modules/mpd.hpp"
#include <fmt/chrono.h>
#include <iostream>
waybar::modules::MPD::MPD(const std::string& id, const Json::Value &config)
@ -19,7 +21,7 @@ waybar::modules::MPD::MPD(const std::string& id, const Json::Value &config)
server_ = config["server"].asCString();
}
worker_ = worker();
event_listener().detach();
event_box_.add_events(Gdk::BUTTON_PRESS_MASK);
event_box_.signal_button_press_event().connect(
@ -27,35 +29,48 @@ waybar::modules::MPD::MPD(const std::string& id, const Json::Value &config)
}
auto waybar::modules::MPD::update() -> void {
std::lock_guard guard(connection_lock_);
tryConnect();
if (connection_ != nullptr) {
try {
bool wasPlaying = playing();
fetchState();
if (!wasPlaying && playing()) {
periodic_updater().detach();
}
} catch (std::exception e) {
stopped_ = true;
state_ = MPD_STATE_UNKNOWN;
}
}
setLabel();
}
std::thread waybar::modules::MPD::worker() {
return std::thread([this] () {
std::thread waybar::modules::MPD::event_listener() {
return std::thread([this] {
while (true) {
if (connection_ == nullptr) {
// Retry periodically if no connection
update();
std::this_thread::sleep_for(interval_);
} else {
// Else, update on any event
waitForEvent();
update();
dp.emit();
}
}
});
}
std::thread waybar::modules::MPD::periodic_updater() {
return std::thread([this] {
while (connection_ != nullptr && playing()) {
dp.emit();
std::this_thread::sleep_for(std::chrono::seconds(1));
}
});
}
void waybar::modules::MPD::setLabel() {
if (connection_ == nullptr) {
label_.get_style_context()->add_class("disconnected");
@ -81,9 +96,10 @@ void waybar::modules::MPD::setLabel() {
auto format = format_;
std::string artist, album_artist, album, title, date;
std::chrono::seconds elapsedTime, totalTime;
std::string stateIcon = "";
if (stopped_) {
if (stopped()) {
format = config_["format-stopped"].isString() ?
config_["format-stopped"].asString() : "stopped";
label_.get_style_context()->add_class("stopped");
@ -97,6 +113,8 @@ void waybar::modules::MPD::setLabel() {
album = mpd_song_get_tag(song_.get(), MPD_TAG_ALBUM, 0);
title = mpd_song_get_tag(song_.get(), MPD_TAG_TITLE, 0);
date = mpd_song_get_tag(song_.get(), MPD_TAG_DATE, 0);
elapsedTime = std::chrono::seconds(mpd_status_get_elapsed_time(status_.get()));
totalTime = std::chrono::seconds(mpd_status_get_total_time(status_.get()));
}
bool consumeActivated = mpd_status_get_consume(status_.get());
@ -115,6 +133,8 @@ void waybar::modules::MPD::setLabel() {
fmt::arg("album", album),
fmt::arg("title", title),
fmt::arg("date", date),
fmt::arg("elapsedTime", elapsedTime),
fmt::arg("totalTime", totalTime),
fmt::arg("stateIcon", stateIcon),
fmt::arg("consumeIcon", consumeIcon),
fmt::arg("randomIcon", randomIcon),
@ -150,15 +170,14 @@ std::string waybar::modules::MPD::getStateIcon() {
return "";
}
if (stopped_) {
if (stopped()) {
std::cerr << "MPD: Trying to fetch state icon while stopped" << std::endl;
return "";
}
if (state_ == MPD_STATE_PLAY) {
if (playing()) {
return config_["state-icons"]["playing"].asString();
} else {
// MPD_STATE_PAUSE
return config_["state-icons"]["paused"].asString();
}
}
@ -201,18 +220,15 @@ void waybar::modules::MPD::tryConnect() {
}
try {
checkErrors();
checkErrors(connection_.get());
} catch (std::runtime_error e) {
std::cerr << "Failed to connect to MPD: " << e.what() << std::endl;
connection_.reset();
alternate_connection_.reset();
}
}
void waybar::modules::MPD::checkErrors() {
auto conn = connection_.get();
void waybar::modules::MPD::checkErrors(mpd_connection* conn) {
switch (mpd_connection_get_error(conn)) {
case MPD_ERROR_SUCCESS:
return;
@ -230,37 +246,47 @@ void waybar::modules::MPD::checkErrors() {
}
void waybar::modules::MPD::fetchState() {
status_ = unique_status(mpd_run_status(connection_.get()), &mpd_status_free);
checkErrors();
auto conn = connection_.get();
status_ = unique_status(mpd_run_status(conn), &mpd_status_free);
checkErrors(conn);
state_ = mpd_status_get_state(status_.get());
checkErrors();
stopped_ = state_ == MPD_STATE_UNKNOWN || state_ == MPD_STATE_STOP;
checkErrors(conn);
song_ = unique_song(mpd_run_current_song(connection_.get()), &mpd_song_free);
checkErrors();
song_ = unique_song(mpd_run_current_song(conn), &mpd_song_free);
checkErrors(conn);
}
void waybar::modules::MPD::waitForEvent() {
auto conn = connection_.get();
auto conn = alternate_connection_.get();
// Wait for a player (play/pause), option (random, shuffle, etc.), or playlist change
mpd_run_idle_mask(conn, static_cast<mpd_idle>(MPD_IDLE_PLAYER | MPD_IDLE_OPTIONS | MPD_IDLE_PLAYLIST));
checkErrors();
checkErrors(conn);
}
bool waybar::modules::MPD::handlePlayPause(GdkEventButton* const& e) {
if (e->type == GDK_2BUTTON_PRESS || e->type == GDK_3BUTTON_PRESS || alternate_connection_ == nullptr) {
if (e->type == GDK_2BUTTON_PRESS || e->type == GDK_3BUTTON_PRESS || connection_ == nullptr) {
return false;
}
if (e->button == 1) {
if (stopped_) {
mpd_run_play(alternate_connection_.get());
std::lock_guard guard(connection_lock_);
if (stopped()) {
mpd_run_play(connection_.get());
} else {
mpd_run_toggle_pause(alternate_connection_.get());
mpd_run_toggle_pause(connection_.get());
}
} else if (e->button == 3) {
mpd_run_stop(alternate_connection_.get());
std::lock_guard guard(connection_lock_);
mpd_run_stop(connection_.get());
}
return true;
}
bool waybar::modules::MPD::stopped() {
return connection_ == nullptr || state_ == MPD_STATE_UNKNOWN || state_ == MPD_STATE_STOP;
}
bool waybar::modules::MPD::playing() {
return connection_ != nullptr && state_ == MPD_STATE_PLAY;
}