2010-02-17 21:52:19 +00:00
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/* -*- mode: c++; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*-
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* vim: ts=4 sw=4 noet ai cindent syntax=cpp
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*
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* Conky, a system monitor, based on torsmo
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*
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* Please see COPYING for details
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*
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* Copyright (C) 2010 Pavel Labath et al.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <config.h>
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#include "setting.hh"
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namespace conky {
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namespace priv {
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/*
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* We cannot construct this object statically, because order of object construction in
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* different modules is not defined, so config_setting_base could be called before this
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* object is constructed. Therefore, we create it on the first call to
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* config_setting_base constructor.
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*/
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config_settings_t *config_settings;
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2010-02-25 20:11:39 +00:00
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config_setting_base::config_setting_base(const std::string &name_)
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: name(name_)
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2010-02-17 21:52:19 +00:00
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{
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struct config_settings_constructor {
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config_settings_constructor() { priv::config_settings = new config_settings_t; }
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~config_settings_constructor() { delete config_settings; config_settings = NULL; }
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};
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static config_settings_constructor constructor;
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bool inserted = config_settings->insert({name, this}).second;
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if(not inserted)
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throw std::logic_error("Setting with name '" + name + "' already registered");
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}
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2010-02-24 19:27:16 +00:00
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void config_setting_base::lua_set(lua::state &l)
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{
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2010-02-25 15:24:50 +00:00
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lua::stack_sentry s(l, -1);
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2010-02-24 19:27:16 +00:00
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l.checkstack(2);
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2010-02-25 15:24:50 +00:00
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l.getglobal("conky");
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l.rawgetfield(-1, "config");
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l.replace(-2);
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2010-02-24 19:27:16 +00:00
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l.insert(-2);
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2010-02-25 15:24:50 +00:00
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l.pushstring(name.c_str());
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2010-02-24 19:27:16 +00:00
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l.insert(-2);
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2010-02-25 15:24:50 +00:00
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l.settable(-3);
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l.pop();
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2010-02-24 19:27:16 +00:00
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}
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2010-02-17 21:52:19 +00:00
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/*
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* Performs the actual assignment of settings. Calls the setting-specific setter after
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* some sanity-checking.
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* stack on entry: | ..., new_config_table, key, value, old_value |
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* stack on exit: | ..., new_config_table, key |
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*/
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2010-02-25 20:11:39 +00:00
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void config_setting_base::process_setting(lua::state &l, bool init)
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2010-02-17 21:52:19 +00:00
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{
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2010-02-25 15:24:50 +00:00
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lua::stack_sentry s(l, -2);
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2010-02-17 21:52:19 +00:00
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2010-02-25 15:47:00 +00:00
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lua::Type type = l.type(-3);
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2010-02-17 21:52:19 +00:00
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if(type != lua::TSTRING) {
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NORM_ERR("invalid setting of type '%s'", l.type_name(type));
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return;
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}
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std::string name = l.tostring(-3);
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auto iter = priv::config_settings->find(name);
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if(iter == priv::config_settings->end()) {
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NORM_ERR("Unknown setting '%s'", name.c_str());
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return;
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}
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2010-03-02 18:29:51 +00:00
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iter->second->lua_setter(l, init);
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2010-02-25 15:24:50 +00:00
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l.pushvalue(-2);
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2010-02-17 21:52:19 +00:00
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l.insert(-2);
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2010-02-25 15:24:50 +00:00
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l.rawset(-4);
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2010-02-17 21:52:19 +00:00
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}
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/*
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* Called when user sets a new value for a setting
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* stack on entry: | config_table, key, value |
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* stack on exit: | |
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*/
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2010-02-25 20:11:39 +00:00
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int config_setting_base::config__newindex(lua::state *l)
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2010-02-17 21:52:19 +00:00
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{
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2010-02-25 15:24:50 +00:00
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lua::stack_sentry s(*l, -3);
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2010-02-17 21:52:19 +00:00
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l->checkstack(1);
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l->getmetatable(-3);
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l->replace(-4);
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2010-02-25 15:24:50 +00:00
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l->pushvalue(-2);
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l->rawget(-4);
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process_setting(*l, false);
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2010-02-17 21:52:19 +00:00
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return 0;
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}
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}
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/*
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* Called after the initial loading of the config file. Performs the initial assignments.
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* at least one setting should always be registered, so config_settings will not be null
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* stack on entry: | ... |
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* stack on exit: | ... |
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*/
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void check_config_settings(lua::state &l)
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{
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lua::stack_sentry s(l);
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l.checkstack(6);
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2010-02-25 15:24:50 +00:00
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l.getglobal("conky"); {
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l.rawgetfield(-1, "config"); {
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2010-02-17 21:52:19 +00:00
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if(l.type(-1) != lua::TTABLE)
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throw std::runtime_error("conky.config must be a table");
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// new conky.config table, containing only valid settings
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2010-02-25 15:24:50 +00:00
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l.newtable(); {
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l.pushnil();
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while(l.next(-3)) {
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l.pushnil();
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2010-02-25 20:11:39 +00:00
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priv::config_setting_base::process_setting(l, true);
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2010-02-25 15:24:50 +00:00
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}
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} l.replace(-2);
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2010-02-17 21:52:19 +00:00
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l.pushboolean(false);
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l.rawsetfield(-2, "__metatable");
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l.pushvalue(-1);
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l.rawsetfield(-2, "__index");
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2010-02-25 20:11:39 +00:00
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l.pushfunction(&priv::config_setting_base::config__newindex);
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2010-02-17 21:52:19 +00:00
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l.rawsetfield(-2, "__newindex");
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// conky.config will not be a table, but a userdata with some metamethods
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// we do this because we want to control access to the settings
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// we use the metatable for storing the settings, that means having a setting
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// whose name stars with "__" is a bad idea
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2010-02-25 15:24:50 +00:00
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l.newuserdata(1);
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2010-02-17 21:52:19 +00:00
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l.insert(-2);
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2010-02-25 15:24:50 +00:00
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l.setmetatable(-2);
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} l.rawsetfield(-2, "config");
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} l.pop();
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2010-02-17 21:52:19 +00:00
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}
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/////////// example settings, remove after real settings are available ///////
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2010-03-02 18:29:51 +00:00
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range_config_setting<int> asdf("asdf", 42, 47, 45, true);
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2010-02-17 21:52:19 +00:00
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}
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