Waybar/src/modules/custom.cpp

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#include "modules/custom.hpp"
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#include <spdlog/spdlog.h>
waybar::modules::Custom::Custom(const std::string& name, const std::string& id,
const Json::Value& config)
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: ALabel(config, "custom-" + name, id, "{}"), name_(name), fp_(nullptr), pid_(-1) {
if (config_["exec"].isString()) {
if (interval_.count() > 0) {
delayWorker();
} else {
continuousWorker();
}
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}
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dp.emit();
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}
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waybar::modules::Custom::~Custom() {
if (pid_ != -1) {
kill(-pid_, 9);
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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auto res = util::command::exec(config_["exec-if"].asString());
if (res.exit_code != 0) {
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can_update = false;
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event_box_.hide();
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}
}
if (can_update) {
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output_ = util::command::exec(config_["exec"].asString());
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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_);
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if (!fp_) {
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throw std::runtime_error("Unable to open " + cmd);
}
thread_ = [&] {
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char* buff = nullptr;
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size_t len = 0;
bool restart = false;
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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()) {
restart = true;
} else {
thread_.stop();
return;
}
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}
std::string output = buff;
// Remove last newline
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if (!output.empty() && output[output.length() - 1] == '\n') {
output.erase(output.length() - 1);
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}
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output_ = {0, output};
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dp.emit();
if (restart) {
pid_ = -1;
fp_ = util::command::open(cmd, pid_);
if (!fp_) {
throw std::runtime_error("Unable to open " + cmd);
}
thread_.sleep_for(std::chrono::seconds(config_["restart-interval"].asUInt()));
}
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};
}
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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();
}
}
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bool waybar::modules::Custom::handleScroll(GdkEventScroll* e) {
auto ret = ALabel::handleScroll(e);
thread_.wake_up();
return ret;
}
bool waybar::modules::Custom::handleToggle(GdkEventButton* const& e) {
auto ret = ALabel::handleToggle(e);
thread_.wake_up();
return ret;
}
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auto waybar::modules::Custom::update() -> void {
// Hide label if output is empty
if (config_["exec"].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();
}
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auto str = fmt::format(format_,
text_,
fmt::arg("alt", alt_),
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);
if (tooltipEnabled()) {
if (text_ == tooltip_) {
label_.set_tooltip_text(str);
} else {
label_.set_tooltip_text(tooltip_);
}
}
auto classes = label_.get_style_context()->list_classes();
for (auto const& c : classes) {
label_.get_style_context()->remove_class(c);
}
for (auto const& c : class_) {
label_.get_style_context()->add_class(c);
}
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event_box_.show();
}
}
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// Call parent update
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)) {
if (i == 0) {
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if (config_["escape"].isBool() && config_["escape"].asBool()) {
text_ = Glib::Markup::escape_text(line);
} else {
text_ = line;
}
tooltip_ = line;
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class_.clear();
} else if (i == 1) {
tooltip_ = line;
} else if (i == 2) {
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class_.push_back(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());
}
}
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if (!parsed["percentage"].asString().empty() && parsed["percentage"].isUInt()) {
percentage_ = parsed["percentage"].asUInt();
} else {
percentage_ = 0;
}
break;
}
}