mirror of
https://github.com/polybar/polybar.git
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06a3de0b89
* Refactor config::dereference* * move config::deprecated* implementation to cpp file * config: move more functions implementation to cpp file
272 lines
7.4 KiB
C++
272 lines
7.4 KiB
C++
#pragma once
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#include <unordered_map>
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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 "settings.hpp"
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#include "utils/env.hpp"
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#include "utils/file.hpp"
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#include "utils/string.hpp"
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#if WITH_XRM
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#include "x11/xresources.hpp"
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#endif
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POLYBAR_NS
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DEFINE_ERROR(value_error);
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DEFINE_ERROR(key_error);
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using valuemap_t = std::unordered_map<string, string>;
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using sectionmap_t = std::map<string, valuemap_t>;
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using file_list = vector<string>;
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class config {
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public:
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explicit config(const logger& logger, string&& path, string&& bar)
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: m_log(logger), m_file(move(path)), m_barname(move(bar)){};
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const string& filepath() const;
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string section() const;
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static constexpr const char* BAR_PREFIX = "bar/";
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/**
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* @brief Instruct the config to connect to the xresource manager
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*/
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void use_xrm();
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void set_sections(sectionmap_t sections);
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void set_included(file_list included);
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file_list get_included_files() 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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bool has(const string& section, const string& key) const;
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/**
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* Set parameter value
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*/
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void set(const string& section, const string& key, string&& value);
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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 = string>
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T get(const string& key) const {
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return get<T>(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 = string>
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T get(const string& section, const string& key) const {
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auto it = m_sections.find(section);
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if (it == m_sections.end()) {
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throw key_error("Missing section \"" + section + "\"");
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}
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if (it->second.find(key) == it->second.end()) {
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throw key_error("Missing parameter \"" + section + "." + key + "\"");
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}
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return convert<T>(dereference(section, key, it->second.at(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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* with a default value in case the parameter isn't defined
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*/
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template <typename T = string>
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T get(const string& section, const string& key, const T& default_value) const {
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try {
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string string_value{get<string>(section, key)};
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return convert<T>(dereference(move(section), move(key), move(string_value)));
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} catch (const key_error& err) {
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return default_value;
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} catch (const std::exception& err) {
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m_log.err("Invalid value for \"%s.%s\", using default value (reason: %s)", section, key, err.what());
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return default_value;
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}
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}
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/**
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* Get list of key-value pairs starting with a prefix by section.
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*
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* Eg: if you have in config `env-FOO = bar`,
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* get_with_prefix(section, "env-") will return [{"FOO", "bar"}]
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*/
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template <typename T = string>
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vector<pair<string, T>> get_with_prefix(const string& section, const string& key_prefix) const {
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auto it = m_sections.find(section);
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if (it == m_sections.end()) {
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throw key_error("Missing section \"" + section + "\"");
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}
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vector<pair<string, T>> list;
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for (const auto& kv_pair : it->second) {
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const auto& key = kv_pair.first;
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if (key.substr(0, key_prefix.size()) == key_prefix) {
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const T& val = get<T>(section, key);
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list.emplace_back(key.substr(key_prefix.size()), val);
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}
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}
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return list;
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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 = string>
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vector<T> get_list(const string& key) const {
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return get_list<T>(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 = string>
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vector<T> get_list(const string& section, const string& key) const {
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vector<T> results;
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while (true) {
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try {
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string string_value{get<string>(section, key + "-" + to_string(results.size()))};
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if (!string_value.empty()) {
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results.emplace_back(convert<T>(dereference(section, key, move(string_value))));
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} else {
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results.emplace_back(convert<T>(move(string_value)));
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}
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} catch (const key_error& err) {
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break;
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}
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}
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if (results.empty()) {
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throw key_error("Missing parameter \"" + section + "." + key + "-0\"");
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}
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return results;
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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 = string>
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vector<T> get_list(const string& section, const string& key, const vector<T>& default_value) const {
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vector<T> results;
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while (true) {
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try {
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string string_value{get<string>(section, key + "-" + to_string(results.size()))};
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if (!string_value.empty()) {
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results.emplace_back(convert<T>(dereference(section, key, move(string_value))));
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} else {
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results.emplace_back(convert<T>(move(string_value)));
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}
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} catch (const key_error& err) {
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break;
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} catch (const std::exception& err) {
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m_log.err("Invalid value in list \"%s.%s\", using list as-is (reason: %s)", section, key, err.what());
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return default_value;
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}
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}
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if (!results.empty()) {
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return results;
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;
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}
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return default_value;
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}
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/**
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* Attempt to load value using the deprecated key name. If successful show a
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* warning message. If it fails load the value using the new key and given
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* fallback value
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*/
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template <typename T = string>
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T deprecated(const string& section, const string& old, const string& newkey, const T& fallback) const {
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try {
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T value{get<T>(section, old)};
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warn_deprecated(section, old, newkey);
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return value;
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} catch (const key_error& err) {
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return get<T>(section, newkey, fallback);
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} catch (const std::exception& err) {
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m_log.err("Invalid value for \"%s.%s\", using fallback key \"%s.%s\" (reason: %s)", section, old, section, newkey,
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err.what());
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return get<T>(section, newkey, fallback);
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}
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}
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protected:
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void copy_inherited();
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template <typename T>
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T convert(string&& value) const;
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/**
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* Dereference value reference
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*/
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string dereference(const string& section, const string& key, const string& var) const;
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/**
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* Dereference local value reference defined using:
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* ${root.key}
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* ${root.key:fallback}
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* ${self.key}
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* ${self.key:fallback}
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* ${section.key}
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* ${section.key:fallback}
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*/
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string dereference_local(string section, const string& key, const string& current_section) const;
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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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string dereference_env(string var) const;
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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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string dereference_xrdb(string var) const;
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/**
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* Dereference file reference by reading its contents
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* ${file:/absolute/file/path}
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* ${file:/absolute/file/path:fallback value}
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*/
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string dereference_file(string var) const;
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private:
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const logger& m_log;
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string m_file;
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string m_barname;
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sectionmap_t m_sections{};
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/**
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* Absolute path of all files that were parsed in the process of parsing the
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* config (Path of the main config file also included)
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*/
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file_list m_included;
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#if WITH_XRM
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unique_ptr<xresource_manager> m_xrm;
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#endif
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};
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POLYBAR_NS_END
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