321 lines
9.2 KiB
C++
321 lines
9.2 KiB
C++
#include "modules/custom_graph.hpp"
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#include <spdlog/spdlog.h>
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#include <algorithm>
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#include <cmath>
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#include <stdexcept>
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#include <string>
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#include "util/scope_guard.hpp"
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waybar::modules::CustomGraph::CustomGraph(const std::string& name, const std::string& id,
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const Json::Value& config, const std::string& output_name)
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: AGraph(config, "custom-graph-" + name, id),
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name_(name),
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output_name_(output_name),
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id_(id),
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tooltip_format_enabled_{config_["tooltip-format"].isString()},
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percentage_(0),
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fp_(nullptr),
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pid_(-1) {
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if (config.isNull()) {
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spdlog::warn("There is no configuration for 'custom-graph/{}', element will be hidden", name);
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}
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if (!config_["signal"].empty() && config_["interval"].empty() &&
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config_["restart-interval"].empty()) {
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waitingWorker();
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} else if (interval_.count() > 0) {
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delayWorker();
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} else if (config_["exec"].isString()) {
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continuousWorker();
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}
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}
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waybar::modules::CustomGraph::~CustomGraph() {
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if (pid_ != -1) {
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killpg(pid_, SIGTERM);
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waitpid(pid_, NULL, 0);
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pid_ = -1;
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}
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}
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void waybar::modules::CustomGraph::delayWorker() {
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thread_ = [this] {
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for (int i : this->pid_children_) {
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int status;
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waitpid(i, &status, 0);
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}
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this->pid_children_.clear();
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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());
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if (output_.exit_code != 0) {
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can_update = false;
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dp.emit();
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}
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}
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if (can_update) {
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if (config_["exec"].isString()) {
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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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};
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}
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void waybar::modules::CustomGraph::continuousWorker() {
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auto cmd = config_["exec"].asString();
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pid_ = -1;
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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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}
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thread_ = [this, cmd] {
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char* buff = nullptr;
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waybar::util::ScopeGuard buff_deleter([&buff]() {
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if (buff) {
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free(buff);
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}
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});
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size_t len = 0;
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if (getline(&buff, &len, fp_) == -1) {
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int exit_code = 1;
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if (fp_) {
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exit_code = WEXITSTATUS(util::command::close(fp_, pid_));
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fp_ = nullptr;
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}
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if (exit_code != 0) {
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output_ = {exit_code, ""};
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dp.emit();
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spdlog::error("{} stopped unexpectedly, is it endless?", name_);
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}
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if (config_["restart-interval"].isUInt()) {
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pid_ = -1;
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thread_.sleep_for(std::chrono::seconds(config_["restart-interval"].asUInt()));
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fp_ = util::command::open(cmd, pid_, output_name_);
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if (!fp_) {
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// Letting this exception escape the SleeperThread would call
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// std::terminate and kill all of Waybar. Degrade gracefully instead.
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output_ = {1, ""};
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dp.emit();
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spdlog::error("Unable to restart {}: unable to open {}", name_, cmd);
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thread_.stop();
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return;
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}
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} else {
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thread_.stop();
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return;
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}
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} else {
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std::string output = buff;
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// Remove last newline
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if (!output.empty() && output[output.length() - 1] == '\n') {
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output.erase(output.length() - 1);
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}
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output_ = {0, output};
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dp.emit();
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}
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};
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}
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void waybar::modules::CustomGraph::waitingWorker() {
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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());
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if (output_.exit_code != 0) {
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can_update = false;
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dp.emit();
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}
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}
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if (can_update) {
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if (config_["exec"].isString()) {
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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();
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};
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}
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void waybar::modules::CustomGraph::refresh(int sig) {
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#ifdef SIGRTMIN
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if (config_["signal"].isInt() && sig == SIGRTMIN + config_["signal"].asInt()) {
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thread_.wake_up();
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}
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#endif
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}
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void waybar::modules::CustomGraph::handleEvent() {
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if (!config_["exec-on-event"].isBool() || config_["exec-on-event"].asBool()) {
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thread_.wake_up();
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}
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}
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bool waybar::modules::CustomGraph::handleScroll(GdkEventScroll* e) {
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auto ret = AGraph::handleScroll(e);
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handleEvent();
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return ret;
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}
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bool waybar::modules::CustomGraph::handleToggle(GdkEventButton* const& e) {
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auto ret = AGraph::handleToggle(e);
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handleEvent();
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return ret;
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}
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auto waybar::modules::CustomGraph::update() -> void {
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// Hide label if output is empty
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if ((config_["exec"].isString() || config_["exec-if"].isString()) &&
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(output_.out.empty() || output_.exit_code != 0)) {
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event_box_.hide();
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} else {
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if (config_["return-type"].asString() == "json") {
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parseOutputJson();
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} else {
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parseOutputRaw();
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}
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try {
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addValue(percentage_);
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if (tooltipEnabled()) {
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if (tooltip_format_enabled_) {
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auto tooltip = config_["tooltip-format"].asString();
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tooltip = fmt::format(fmt::runtime(tooltip), fmt::arg("text", text_),
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fmt::arg("alt", alt_), fmt::arg("percentage", percentage_));
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graph_.set_tooltip_markup(tooltip);
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} else {
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if (graph_.get_tooltip_markup() != tooltip_) {
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graph_.set_tooltip_markup(tooltip_);
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}
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}
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}
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auto style = graph_.get_style_context();
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auto classes = style->list_classes();
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for (auto const& c : classes) {
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if (c == id_) continue;
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style->remove_class(c);
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}
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for (auto const& c : class_) {
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style->add_class(c);
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}
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style->add_class("flat");
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style->add_class(MODULE_CLASS);
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event_box_.show();
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} catch (const fmt::format_error& e) {
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if (std::strcmp(e.what(), "cannot switch from manual to automatic argument indexing") != 0)
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throw;
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throw fmt::format_error(
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"mixing manual and automatic argument indexing is no longer supported; "
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"try replacing \"{}\" with \"{text}\" in your format specifier");
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}
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}
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// Call parent update
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AGraph::update();
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}
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void waybar::modules::CustomGraph::parseOutputRaw() {
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std::istringstream output(output_.out);
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std::string line;
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int i = 0;
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while (getline(output, line)) {
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Glib::ustring validated_line = line;
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if (!validated_line.validate()) {
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validated_line = validated_line.make_valid();
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}
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if (i == 0) {
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if (config_["escape"].isBool() && config_["escape"].asBool()) {
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text_ = Glib::Markup::escape_text(validated_line);
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tooltip_ = Glib::Markup::escape_text(validated_line);
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} else {
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text_ = validated_line;
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tooltip_ = validated_line;
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}
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class_.clear();
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// Derive the graph value from the first line's leading numeric value,
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// since the raw (i3blocks) format has no dedicated percentage field.
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std::string value = validated_line;
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if (!value.empty() && value.back() == '%') {
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value.pop_back();
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}
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try {
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double parsed = std::stod(value);
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if (std::isnan(parsed)) {
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percentage_ = 0;
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} else {
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percentage_ = static_cast<int>(std::clamp(std::lround(parsed), 0L, 100L));
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}
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} catch (const std::exception&) {
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percentage_ = 0;
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}
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} else if (i == 1) {
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if (config_["escape"].isBool() && config_["escape"].asBool()) {
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tooltip_ = Glib::Markup::escape_text(validated_line);
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} else {
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tooltip_ = validated_line;
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}
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} else if (i == 2) {
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class_.push_back(validated_line);
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} else {
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break;
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}
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i++;
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}
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}
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void waybar::modules::CustomGraph::parseOutputJson() {
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std::istringstream output(output_.out);
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std::string line;
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class_.clear();
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// A script can emit invalid UTF-8; passing it unchecked to Pango/GTK aborts
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// the whole bar in g_utf8_* (see parseOutputRaw, which validates the same way).
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auto sanitize = [](const std::string& s) -> Glib::ustring {
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Glib::ustring value = s;
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if (!value.validate()) {
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value = value.make_valid();
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}
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return value;
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};
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while (getline(output, line)) {
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auto parsed = parser_.parse(line);
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const bool escape = config_["escape"].isBool() && config_["escape"].asBool();
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if (escape) {
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text_ = Glib::Markup::escape_text(sanitize(parsed["text"].asString()));
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} else {
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text_ = sanitize(parsed["text"].asString());
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}
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if (escape) {
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alt_ = Glib::Markup::escape_text(sanitize(parsed["alt"].asString()));
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} else {
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alt_ = sanitize(parsed["alt"].asString());
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}
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if (escape) {
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tooltip_ = Glib::Markup::escape_text(sanitize(parsed["tooltip"].asString()));
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} else {
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tooltip_ = sanitize(parsed["tooltip"].asString());
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}
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if (parsed["class"].isString()) {
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class_.push_back(parsed["class"].asString());
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} 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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}
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}
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if (!parsed["percentage"].asString().empty() && parsed["percentage"].isNumeric()) {
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percentage_ = (int)lround(parsed["percentage"].asFloat());
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} else {
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percentage_ = 0;
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}
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break;
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}
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}
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