237 lines
6.9 KiB
C++
237 lines
6.9 KiB
C++
#pragma once
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#include <boost/lexical_cast.hpp>
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#include <boost/optional.hpp>
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#include <boost/property_tree/ini_parser.hpp>
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#include <boost/property_tree/ptree.hpp>
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#include "common.hpp"
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#include "components/logger.hpp"
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#include "errors.hpp"
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#include "utils/env.hpp"
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#include "utils/string.hpp"
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#include "x11/xresources.hpp"
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POLYBAR_NS
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#define GET_CONFIG_VALUE(section, var, name) var = m_conf.get<decltype(var)>(section, name, var)
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#define REQ_CONFIG_VALUE(section, var, name) var = m_conf.get<decltype(var)>(section, name)
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using ptree = boost::property_tree::ptree;
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DEFINE_ERROR(value_error);
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DEFINE_ERROR(key_error);
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class config {
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public:
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explicit config(const logger& logger, const xresource_manager& xrm) : m_logger(logger), m_xrm(xrm) {}
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void load(string file, string barname);
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string filepath() const;
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string bar_section() const;
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vector<string> defined_bars() const;
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string build_path(const string& section, const string& key) const;
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void warn_deprecated(const string& section, const string& key, string replacement) const;
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/**
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* Returns true if a given parameter exists
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*/
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template <typename T>
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bool has(string section, string key) const {
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auto val = m_ptree.get_optional<T>(build_path(section, key));
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return (val != boost::none);
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}
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/**
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* Get parameter for the current bar by name
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*/
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template <typename T>
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T get(string key) const {
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return get<T>(bar_section(), key);
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}
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/**
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* Get value of a variable by section and parameter name
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*/
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template <typename T>
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T get(string section, string key) const {
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auto val = m_ptree.get_optional<T>(build_path(section, key));
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if (val == boost::none)
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throw key_error("Missing parameter [" + section + "." + key + "]");
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auto str_val = m_ptree.get<string>(build_path(section, key));
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return dereference<T>(section, key, str_val, val.get());
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}
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/**
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* Get value of a variable by section and parameter name
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* with a default value in case the parameter isn't defined
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*/
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template <typename T>
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T get(string section, string key, T default_value) const {
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auto val = m_ptree.get_optional<T>(build_path(section, key));
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auto str_val = m_ptree.get_optional<string>(build_path(section, key));
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return dereference<T>(section, key, str_val.get_value_or(""), val.get_value_or(default_value));
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}
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/**
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* Get list of values for the current bar by name
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*/
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template <typename T>
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vector<T> get_list(string key) const {
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return get_list<T>(bar_section(), key);
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}
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/**
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* Get list of values by section and parameter name
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*/
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template <typename T>
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vector<T> get_list(string section, string key) const {
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vector<T> vec;
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boost::optional<T> value;
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while ((value = m_ptree.get_optional<T>(build_path(section, key) + "-" + to_string(vec.size()))) != boost::none) {
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auto str_val = m_ptree.get<string>(build_path(section, key) + "-" + to_string(vec.size()));
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vec.emplace_back(dereference<T>(section, key, str_val, value.get()));
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}
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if (vec.empty())
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throw key_error("Missing parameter [" + section + "." + key + "-0]");
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return vec;
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}
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/**
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* Get list of values by section and parameter name
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* with a default list in case the list isn't defined
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*/
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template <typename T>
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vector<T> get_list(string section, string key, vector<T> default_value) const {
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vector<T> vec;
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boost::optional<T> value;
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while ((value = m_ptree.get_optional<T>(build_path(section, key) + "-" + to_string(vec.size()))) != boost::none) {
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auto str_val = m_ptree.get<string>(build_path(section, key) + "-" + to_string(vec.size()));
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vec.emplace_back(dereference<T>(section, key, str_val, value.get()));
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}
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if (vec.empty())
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return default_value;
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else
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return vec;
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}
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protected:
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/**
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* Dereference value reference
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*/
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template <typename T>
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T dereference(string section, string key, string var, const T value) const {
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if (var.substr(0, 2) != "${" || var.substr(var.length() - 1) != "}") {
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return value;
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}
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auto path = var.substr(2, var.length() - 3);
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size_t pos;
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if (path.find("env:") == 0) {
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return dereference_env<T>(path.substr(4), value);
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} else if (path.find("xrdb:") == 0) {
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return dereference_xrdb<T>(path.substr(5), value);
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} else if ((pos = path.find(".")) != string::npos) {
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return dereference_local<T>(path.substr(0, pos), path.substr(pos + 1), section);
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} else {
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throw value_error("Invalid reference defined at [" + build_path(section, key) + "]");
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}
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}
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/**
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* Dereference local value reference defined using:
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* ${root.key}
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* ${self.key}
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* ${section.key}
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*/
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template <typename T>
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T dereference_local(string section, string key, string current_section) const {
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if (section == "BAR")
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m_logger.warn("${BAR.key} is deprecated. Use ${root.key} instead");
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section = string_util::replace(section, "BAR", bar_section(), 0, 3);
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section = string_util::replace(section, "root", bar_section(), 0, 4);
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section = string_util::replace(section, "self", current_section, 0, 4);
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auto path = build_path(section, key);
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auto result = m_ptree.get_optional<T>(path);
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if (result == boost::none)
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throw value_error("Unexisting reference defined [" + path + "]");
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return dereference<T>(section, key, m_ptree.get<string>(path), result.get());
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}
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/**
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* Dereference environment variable reference defined using:
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* ${env:key}
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* ${env:key:fallback value}
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*/
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template <typename T>
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T dereference_env(string var, T fallback) const {
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size_t pos;
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if ((pos = var.find(":")) != string::npos) {
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fallback = boost::lexical_cast<T>(var.substr(pos + 1));
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var.erase(pos);
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}
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if (env_util::has(var.c_str()))
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return boost::lexical_cast<T>(env_util::get(var.c_str()));
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return fallback;
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}
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/**
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* Dereference X resource db value defined using:
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* ${xrdb:key}
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* ${xrdb:key:fallback value}
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*/
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template <typename T>
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T dereference_xrdb(string var, T fallback) const {
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size_t pos;
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if ((pos = var.find(":")) != string::npos) {
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fallback = boost::lexical_cast<T>(var.substr(pos + 1));
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var.erase(pos);
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}
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if (std::is_same<string, T>::value)
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return boost::lexical_cast<T>(m_xrm.get_string(var, boost::lexical_cast<string>(fallback)));
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else if (std::is_same<float, T>::value)
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return boost::lexical_cast<T>(m_xrm.get_float(var, boost::lexical_cast<float>(fallback)));
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else if (std::is_same<int, T>::value)
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return boost::lexical_cast<T>(m_xrm.get_int(var, boost::lexical_cast<int>(fallback)));
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return fallback;
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}
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private:
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const logger& m_logger;
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const xresource_manager& m_xrm;
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ptree m_ptree;
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string m_file;
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string m_current_bar;
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};
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namespace {
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/**
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* Configure injection module
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*/
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template <typename T = const config&>
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di::injector<T> configure_config() {
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return di::make_injector(configure_logger(), configure_xresource_manager());
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}
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}
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POLYBAR_NS_END
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