mirror of https://github.com/polybar/polybar.git
65 lines
1.4 KiB
C++
65 lines
1.4 KiB
C++
#pragma once
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#include "settings.hpp"
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#if not WITH_XRM
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#error "Not built with support for xcb-xrm..."
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#endif
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#include <xcb/xcb_xrm.h>
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#include "common.hpp"
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#include "errors.hpp"
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#include "utils/string.hpp"
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#include "x11/connection.hpp"
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POLYBAR_NS
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DEFINE_ERROR(xresource_error);
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class xresource_manager {
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public:
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explicit xresource_manager(xcb_connection_t* conn) : m_xrm(xcb_xrm_database_from_default(conn)) {
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if (m_xrm == nullptr) {
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throw application_error("xcb_xrm_database_from_default()");
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}
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}
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~xresource_manager() {
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xcb_xrm_database_free(m_xrm);
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}
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operator bool() const {
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return m_xrm != nullptr;
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}
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template <typename T>
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T require(const char* name) const {
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char* result{nullptr};
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if (xcb_xrm_resource_get_string(m_xrm, string_util::replace(name, "*", ".").c_str(), nullptr, &result) == -1) {
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throw xresource_error(sstream() << "X resource \"" << name << "\" not found");
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} else if (result == nullptr) {
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throw xresource_error(sstream() << "X resource \"" << name << "\" not found");
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}
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return convert<T>(string(result));
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}
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template <typename T>
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T get(const char* name, const T& fallback) const {
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try {
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return convert<T>(require<T>(name));
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} catch (const xresource_error) {
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return fallback;
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}
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}
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protected:
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template <typename T>
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T convert(string&& value) const;
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private:
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xcb_xrm_database_t* m_xrm;
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};
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POLYBAR_NS_END
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