Waybar/src/modules/custom.cpp

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#include "modules/custom.hpp"
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#include <spdlog/spdlog.h>
#include "util/scope_guard.hpp"
waybar::modules::Custom::Custom(const std::string& name, const std::string& id,
const Json::Value& config, const std::string& output_name)
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: ALabel(config, "custom-" + name, id, "{}"),
name_(name),
output_name_(output_name),
id_(id),
percentage_(0),
fp_(nullptr),
pid_(-1) {
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dp.emit();
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if (!config_["signal"].empty() && config_["interval"].empty()) {
waitingWorker();
} else if (interval_.count() > 0) {
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delayWorker();
} else if (config_["exec"].isString()) {
continuousWorker();
}
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}
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waybar::modules::Custom::~Custom() {
if (pid_ != -1) {
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killpg(pid_, SIGTERM);
waitpid(pid_, NULL, 0);
pid_ = -1;
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}
}
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void waybar::modules::Custom::delayWorker() {
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thread_ = [this] {
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bool can_update = true;
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if (config_["exec-if"].isString()) {
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output_ = util::command::execNoRead(config_["exec-if"].asString());
if (output_.exit_code != 0) {
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can_update = false;
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dp.emit();
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}
}
if (can_update) {
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if (config_["exec"].isString()) {
output_ = util::command::exec(config_["exec"].asString(), output_name_);
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}
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dp.emit();
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}
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thread_.sleep_for(interval_);
};
}
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void waybar::modules::Custom::continuousWorker() {
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auto cmd = config_["exec"].asString();
pid_ = -1;
fp_ = util::command::open(cmd, pid_, output_name_);
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if (!fp_) {
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throw std::runtime_error("Unable to open " + cmd);
}
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thread_ = [this, cmd] {
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char* buff = nullptr;
waybar::util::ScopeGuard buff_deleter([buff]() {
if (buff) {
free(buff);
}
});
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size_t len = 0;
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if (getline(&buff, &len, fp_) == -1) {
int exit_code = 1;
if (fp_) {
exit_code = WEXITSTATUS(util::command::close(fp_, pid_));
fp_ = nullptr;
}
if (exit_code != 0) {
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output_ = {exit_code, ""};
dp.emit();
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spdlog::error("{} stopped unexpectedly, is it endless?", name_);
}
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if (config_["restart-interval"].isUInt()) {
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pid_ = -1;
thread_.sleep_for(std::chrono::seconds(config_["restart-interval"].asUInt()));
fp_ = util::command::open(cmd, pid_, output_name_);
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if (!fp_) {
throw std::runtime_error("Unable to open " + cmd);
}
} else {
thread_.stop();
return;
}
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} else {
std::string output = buff;
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// Remove last newline
if (!output.empty() && output[output.length() - 1] == '\n') {
output.erase(output.length() - 1);
}
output_ = {0, output};
dp.emit();
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}
};
}
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void waybar::modules::Custom::waitingWorker() {
thread_ = [this] {
bool can_update = true;
if (config_["exec-if"].isString()) {
output_ = util::command::execNoRead(config_["exec-if"].asString());
if (output_.exit_code != 0) {
can_update = false;
dp.emit();
}
}
if (can_update) {
if (config_["exec"].isString()) {
output_ = util::command::exec(config_["exec"].asString(), output_name_);
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}
dp.emit();
}
thread_.sleep();
};
}
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void waybar::modules::Custom::refresh(int sig) {
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if (sig == SIGRTMIN + config_["signal"].asInt()) {
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thread_.wake_up();
}
}
void waybar::modules::Custom::handleEvent() {
if (!config_["exec-on-event"].isBool() || config_["exec-on-event"].asBool()) {
thread_.wake_up();
}
}
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bool waybar::modules::Custom::handleScroll(GdkEventScroll* e) {
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auto ret = ALabel::handleScroll(e);
handleEvent();
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return ret;
}
bool waybar::modules::Custom::handleToggle(GdkEventButton* const& e) {
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auto ret = ALabel::handleToggle(e);
handleEvent();
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return ret;
}
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auto waybar::modules::Custom::update() -> void {
// Hide label if output is empty
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if ((config_["exec"].isString() || config_["exec-if"].isString()) &&
(output_.out.empty() || output_.exit_code != 0)) {
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event_box_.hide();
} else {
if (config_["return-type"].asString() == "json") {
parseOutputJson();
} else {
parseOutputRaw();
}
auto str = fmt::format(fmt::runtime(format_), text_, fmt::arg("alt", alt_),
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fmt::arg("icon", getIcon(percentage_, alt_)),
fmt::arg("percentage", percentage_));
if (str.empty()) {
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event_box_.hide();
} else {
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label_.set_markup(str);
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if (tooltipEnabled()) {
if (text_ == tooltip_) {
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if (label_.get_tooltip_markup() != str) {
label_.set_tooltip_markup(str);
}
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} else {
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if (label_.get_tooltip_markup() != tooltip_) {
label_.set_tooltip_markup(tooltip_);
}
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}
}
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auto classes = label_.get_style_context()->list_classes();
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for (auto const& c : classes) {
if (c == id_) continue;
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label_.get_style_context()->remove_class(c);
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}
for (auto const& c : class_) {
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label_.get_style_context()->add_class(c);
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}
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label_.get_style_context()->add_class("flat");
label_.get_style_context()->add_class("text-button");
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event_box_.show();
}
}
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// Call parent update
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ALabel::update();
}
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void waybar::modules::Custom::parseOutputRaw() {
std::istringstream output(output_.out);
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std::string line;
int i = 0;
while (getline(output, line)) {
Glib::ustring validated_line = line;
if (!validated_line.validate()) {
validated_line = validated_line.make_valid();
}
if (i == 0) {
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if (config_["escape"].isBool() && config_["escape"].asBool()) {
text_ = Glib::Markup::escape_text(validated_line);
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} else {
text_ = validated_line;
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}
tooltip_ = validated_line;
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class_.clear();
} else if (i == 1) {
tooltip_ = validated_line;
} else if (i == 2) {
class_.push_back(validated_line);
} else {
break;
}
i++;
}
}
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void waybar::modules::Custom::parseOutputJson() {
std::istringstream output(output_.out);
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std::string line;
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class_.clear();
while (getline(output, line)) {
auto parsed = parser_.parse(line);
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if (config_["escape"].isBool() && config_["escape"].asBool()) {
text_ = Glib::Markup::escape_text(parsed["text"].asString());
} else {
text_ = parsed["text"].asString();
}
if (config_["escape"].isBool() && config_["escape"].asBool()) {
alt_ = Glib::Markup::escape_text(parsed["alt"].asString());
} else {
alt_ = parsed["alt"].asString();
}
tooltip_ = parsed["tooltip"].asString();
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if (parsed["class"].isString()) {
class_.push_back(parsed["class"].asString());
} else if (parsed["class"].isArray()) {
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for (auto const& c : parsed["class"]) {
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class_.push_back(c.asString());
}
}
if (!parsed["percentage"].asString().empty() && parsed["percentage"].isNumeric()) {
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percentage_ = (int)lround(parsed["percentage"].asFloat());
} else {
percentage_ = 0;
}
break;
}
}