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abilities.cpp
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abilities.cpp
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/*
Copyright (C) 2006 - 2018 by Dominic Bolin <dominic.bolin@exong.net>
Part of the Battle for Wesnoth Project https://www.wesnoth.org/
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY.
See the COPYING file for more details.
*/
/**
* @file
* Manage unit-abilities, like heal, cure, and weapon_specials.
*/
#include "display.hpp"
#include "display_context.hpp"
#include "font/text_formatting.hpp"
#include "game_board.hpp"
#include "lexical_cast.hpp"
#include "log.hpp"
#include "map/map.hpp"
#include "resources.hpp"
#include "team.hpp"
#include "terrain/filter.hpp"
#include "units/unit.hpp"
#include "units/abilities.hpp"
#include "units/filter.hpp"
#include "units/map.hpp"
#include "filter_context.hpp"
#include "formula/callable_objects.hpp"
#include "formula/formula.hpp"
#include "formula/function_gamestate.hpp"
#include "serialization/string_view.hpp"
#include "deprecation.hpp"
#include <boost/dynamic_bitset.hpp>
#include <boost/algorithm/string/predicate.hpp>
static lg::log_domain log_engine("engine");
#define ERR_NG LOG_STREAM(err, log_engine)
namespace {
class temporary_facing
{
map_location::DIRECTION save_dir_;
unit_const_ptr u_;
public:
temporary_facing(unit_const_ptr u, map_location::DIRECTION new_dir)
: save_dir_(u ? u->facing() : map_location::NDIRECTIONS)
, u_(u)
{
if (u_) {
u_->set_facing(new_dir);
}
}
~temporary_facing()
{
if (u_) {
u_->set_facing(save_dir_);
}
}
};
}
/*
*
* [abilities]
* ...
*
* [heals]
* value=4
* max_value=8
* cumulative=no
* affect_allies=yes
* name= _ "heals"
* female_name= _ "female^heals"
* name_inactive=null
* female_name_inactive=null
* description= _ "Heals:
Allows the unit to heal adjacent friendly units at the beginning of each turn.
A unit cared for by a healer may heal up to 4 HP per turn.
A poisoned unit cannot be cured of its poison by a healer, and must seek the care of a village or a unit that can cure."
* description_inactive=null
*
* affect_self=yes
* [filter] // SUF
* ...
* [/filter]
* [filter_self] // SUF
* ...
* [/filter_self]
* [filter_adjacent] // SUF
* adjacent=n,ne,nw
* ...
* [/filter_adjacent]
* [filter_adjacent_location]
* adjacent=n,ne,nw
* ...
* [/filter_adjacent]
* [affect_adjacent]
* adjacent=n,ne,nw
* [filter] // SUF
* ...
* [/filter]
* [/affect_adjacent]
* [affect_adjacent]
* adjacent=s,se,sw
* [filter] // SUF
* ...
* [/filter]
* [/affect_adjacent]
*
* [/heals]
*
* ...
* [/abilities]
*
*/
namespace {
bool affects_side(const config& cfg, std::size_t side, std::size_t other_side)
{
// display::get_singleton() has already been confirmed valid by both callers.
const team& side_team = display::get_singleton()->get_disp_context().get_team(side);
if(side == other_side)
return cfg["affect_allies"].to_bool(true);
if(side_team.is_enemy(other_side))
return cfg["affect_enemies"].to_bool();
else
return cfg["affect_allies"].to_bool();
}
}
bool unit::get_ability_bool(const std::string& tag_name, const map_location& loc) const
{
for (const config &i : this->abilities_.child_range(tag_name)) {
if (ability_active(tag_name, i, loc) &&
ability_affects_self(tag_name, i, loc))
{
return true;
}
}
assert(display::get_singleton());
const unit_map& units = display::get_singleton()->get_units();
const auto adjacent = get_adjacent_tiles(loc);
for(unsigned i = 0; i < adjacent.size(); ++i) {
const unit_map::const_iterator it = units.find(adjacent[i]);
if (it == units.end() || it->incapacitated())
continue;
// Abilities may be tested at locations other than the unit's current
// location. This is intentional to allow for less messing with the unit
// map during calculations, particularly with regards to movement.
// Thus, we need to make sure the adjacent unit (*it) is not actually
// ourself.
if ( &*it == this )
continue;
for (const config &j : it->abilities_.child_range(tag_name)) {
if (affects_side(j, side(), it->side()) &&
it->ability_active(tag_name, j, adjacent[i]) &&
ability_affects_adjacent(tag_name, j, i, loc, *it))
{
return true;
}
}
}
return false;
}
unit_ability_list unit::get_abilities(const std::string& tag_name, const map_location& loc) const
{
unit_ability_list res(loc_);
for(const config& i : this->abilities_.child_range(tag_name)) {
if(ability_active(tag_name, i, loc)
&& ability_affects_self(tag_name, i, loc))
{
res.emplace_back(&i, loc, loc);
}
}
assert(display::get_singleton());
const unit_map& units = display::get_singleton()->get_units();
const auto adjacent = get_adjacent_tiles(loc);
for(unsigned i = 0; i < adjacent.size(); ++i) {
const unit_map::const_iterator it = units.find(adjacent[i]);
if (it == units.end() || it->incapacitated())
continue;
// Abilities may be tested at locations other than the unit's current
// location. This is intentional to allow for less messing with the unit
// map during calculations, particularly with regards to movement.
// Thus, we need to make sure the adjacent unit (*it) is not actually
// ourself.
if ( &*it == this )
continue;
for(const config& j : it->abilities_.child_range(tag_name)) {
if(affects_side(j, side(), it->side())
&& it->ability_active(tag_name, j, adjacent[i])
&& ability_affects_adjacent(tag_name, j, i, loc, *it))
{
res.emplace_back(&j, loc, adjacent[i]);
}
}
}
return res;
}
unit_ability_list unit::get_abilities_weapons(const std::string& tag_name, const map_location& loc, const_attack_ptr weapon, const_attack_ptr opp_weapon) const
{
unit_ability_list res = get_abilities(tag_name, loc);
for(unit_ability_list::iterator i = res.begin(); i != res.end();) {
if((!ability_affects_weapon(*i->ability_cfg, weapon, false) || !ability_affects_weapon(*i->ability_cfg, opp_weapon, true))) {
i = res.erase(i);
} else {
++i;
}
}
return res;
}
std::vector<std::string> unit::get_ability_list() const
{
std::vector<std::string> res;
for (const config::any_child &ab : this->abilities_.all_children_range()) {
std::string id = ab.cfg["id"];
if (!id.empty())
res.push_back(std::move(id));
}
return res;
}
namespace {
// These functions might have wider usefulness than this file, but for now
// I'll make them local.
/**
* Chooses a value from the given config. If the value specified by @a key is
* blank, then @a default_key is chosen instead.
*/
inline const config::attribute_value & default_value(
const config & cfg, const std::string & key, const std::string & default_key)
{
const config::attribute_value & value = cfg[key];
return !value.blank() ? value : cfg[default_key];
}
/**
* Chooses a value from the given config based on gender. If the value for
* the specified gender is blank, then @a default_key is chosen instead.
*/
inline const config::attribute_value & gender_value(
const config & cfg, unit_race::GENDER gender, const std::string & male_key,
const std::string & female_key, const std::string & default_key)
{
return default_value(cfg,
gender == unit_race::MALE ? male_key : female_key,
default_key);
}
/**
* Adds a quadruple consisting of (in order) id, base name,
* male or female name as appropriate for the unit, and description.
*
* @returns Whether name was resolved and quadruple added.
*/
bool add_ability_tooltip(const config::any_child &ab, unit_race::GENDER gender, std::vector<std::tuple<std::string, t_string,t_string,t_string>>& res, bool active)
{
if (active) {
const t_string& name = gender_value(ab.cfg, gender, "name", "female_name", "name").t_str();
if (!name.empty()) {
res.emplace_back(
ab.cfg["id"],
ab.cfg["name"].t_str(),
name,
ab.cfg["description"].t_str() );
return true;
}
}
else
{
// See if an inactive name was specified.
const config::attribute_value& inactive_value =
gender_value(ab.cfg, gender, "name_inactive",
"female_name_inactive", "name_inactive");
const t_string& name = !inactive_value.blank() ? inactive_value.t_str() :
gender_value(ab.cfg, gender, "name", "female_name", "name").t_str();
if (!name.empty()) {
res.emplace_back(
ab.cfg["id"],
default_value(ab.cfg, "name_inactive", "name").t_str(),
name,
default_value(ab.cfg, "description_inactive", "description").t_str() );
return true;
}
}
return false;
}
}
std::vector<std::tuple<std::string, t_string, t_string, t_string>> unit::ability_tooltips() const
{
std::vector<std::tuple<std::string, t_string,t_string,t_string>> res;
for (const config::any_child &ab : this->abilities_.all_children_range())
{
add_ability_tooltip(ab, gender_, res, true);
}
return res;
}
std::vector<std::tuple<std::string, t_string, t_string, t_string>> unit::ability_tooltips(boost::dynamic_bitset<>& active_list, const map_location& loc) const
{
std::vector<std::tuple<std::string, t_string,t_string,t_string>> res;
active_list.clear();
for (const config::any_child &ab : this->abilities_.all_children_range())
{
bool active = ability_active(ab.key, ab.cfg, loc);
if (add_ability_tooltip(ab, gender_, res, active))
{
active_list.push_back(active);
}
}
return res;
}
bool unit::ability_active(const std::string& ability,const config& cfg,const map_location& loc) const
{
bool illuminates = ability == "illuminates";
if (const config &afilter = cfg.child("filter"))
if ( !unit_filter(vconfig(afilter)).set_use_flat_tod(illuminates).matches(*this, loc) )
return false;
const auto adjacent = get_adjacent_tiles(loc);
assert(display::get_singleton());
const unit_map& units = display::get_singleton()->get_units();
for (const config &i : cfg.child_range("filter_adjacent"))
{
std::size_t count = 0;
unit_filter ufilt{ vconfig(i) };
ufilt.set_use_flat_tod(illuminates);
std::vector<map_location::DIRECTION> dirs = map_location::parse_directions(i["adjacent"]);
for (const map_location::DIRECTION index : dirs)
{
if (index == map_location::NDIRECTIONS)
continue;
unit_map::const_iterator unit = units.find(adjacent[index]);
if (unit == units.end())
return false;
if (!ufilt(*unit, *this))
return false;
if (i.has_attribute("is_enemy")) {
const display_context& dc = resources::filter_con->get_disp_context();
if (i["is_enemy"].to_bool() != dc.get_team(unit->side()).is_enemy(side_)) {
continue;
}
}
count++;
}
if (i["count"].empty() && count != dirs.size()) {
return false;
}
if (!in_ranges<int>(count, utils::parse_ranges(i["count"].str()))) {
return false;
}
}
for (const config &i : cfg.child_range("filter_adjacent_location"))
{
std::size_t count = 0;
terrain_filter adj_filter(vconfig(i), resources::filter_con, false);
adj_filter.flatten(illuminates);
std::vector<map_location::DIRECTION> dirs = map_location::parse_directions(i["adjacent"]);
for (const map_location::DIRECTION index : dirs)
{
if (index == map_location::NDIRECTIONS) {
continue;
}
if(!adj_filter.match(adjacent[index])) {
return false;
}
count++;
}
if (i["count"].empty() && count != dirs.size()) {
return false;
}
if (!in_ranges<int>(count, utils::parse_ranges(i["count"].str()))) {
return false;
}
}
return true;
}
bool unit::ability_affects_adjacent(const std::string& ability, const config& cfg,int dir,const map_location& loc,const unit& from) const
{
bool illuminates = ability == "illuminates";
assert(dir >=0 && dir <= 5);
map_location::DIRECTION direction = static_cast<map_location::DIRECTION>(dir);
for (const config &i : cfg.child_range("affect_adjacent"))
{
if (i.has_attribute("adjacent")) { //key adjacent defined
std::vector<map_location::DIRECTION> dirs = map_location::parse_directions(i["adjacent"]);
if (std::find(dirs.begin(), dirs.end(), direction) == dirs.end()) {
continue;
}
}
const config &filter = i.child("filter");
if (!filter || //filter tag given
unit_filter(vconfig(filter)).set_use_flat_tod(illuminates).matches(*this, loc, from) ) {
return true;
}
}
return false;
}
bool unit::ability_affects_self(const std::string& ability,const config& cfg,const map_location& loc) const
{
const config &filter = cfg.child("filter_self");
bool affect_self = cfg["affect_self"].to_bool(true);
if (!filter || !affect_self) return affect_self;
return unit_filter(vconfig(filter)).set_use_flat_tod(ability == "illuminates").matches(*this, loc);
}
bool unit::ability_affects_weapon(const config& cfg, const_attack_ptr weapon, bool is_opp) const
{
const std::string filter_tag_name = is_opp ? "filter_second_weapon" : "filter_weapon";
if(!cfg.has_child(filter_tag_name)) {
return true;
}
const config& filter = cfg.child(filter_tag_name);
if(!weapon) {
return false;
}
return weapon->matches_filter(filter);
}
bool unit::has_ability_type(const std::string& ability) const
{
return !abilities_.child_range(ability).empty();
}
void attack_type::add_formula_context(wfl::map_formula_callable& callable) const
{
if(unit_const_ptr & att = is_attacker_ ? self_ : other_) {
callable.add("attacker", wfl::variant(std::make_shared<wfl::unit_callable>(*att)));
}
if(unit_const_ptr & def = is_attacker_ ? other_ : self_) {
callable.add("defender", wfl::variant(std::make_shared<wfl::unit_callable>(*def)));
}
}
namespace {
template<typename T, typename TFuncFormula>
class get_ability_value_visitor
#ifdef USING_BOOST_VARIANT
: public boost::static_visitor<T>
#endif
{
public:
// Constructor stores the default value.
get_ability_value_visitor(T def, const TFuncFormula& formula_handler) : def_(def), formula_handler_(formula_handler) {}
T operator()(const utils::monostate&) const { return def_; }
T operator()(bool) const { return def_; }
T operator()(int i) const { return static_cast<T>(i); }
T operator()(unsigned long long u) const { return static_cast<T>(u); }
T operator()(double d) const { return static_cast<T>(d); }
T operator()(const t_string&) const { return def_; }
T operator()(const std::string& s) const
{
if(s.size() >= 2 && s[0] == '(') {
return formula_handler_(s);
}
return lexical_cast_default<T>(s, def_);
}
private:
const T def_;
const TFuncFormula& formula_handler_;
};
template<typename T, typename TFuncFormula>
get_ability_value_visitor<T, TFuncFormula> make_get_ability_value_visitor(T def, const TFuncFormula& formula_handler)
{
return get_ability_value_visitor<T, TFuncFormula>(def, formula_handler);
}
template<typename T, typename TFuncFormula>
T get_single_ability_value(const config::attribute_value& v, T def, const unit_ability& ability_info, const map_location& receiver_loc, const_attack_ptr att, const TFuncFormula& formula_handler)
{
return v.apply_visitor(make_get_ability_value_visitor(def, [&](const std::string& s) {
try {
assert(display::get_singleton());
const unit_map& units = display::get_singleton()->get_units();
auto u_itor = units.find(ability_info.teacher_loc);
if(u_itor == units.end()) {
return def;
}
wfl::map_formula_callable callable(std::make_shared<wfl::unit_callable>(*u_itor));
if(att) {
att->add_formula_context(callable);
}
if (auto uptr = units.find_unit_ptr(ability_info.student_loc)) {
callable.add("student", wfl::variant(std::make_shared<wfl::unit_callable>(*uptr)));
}
if (auto uptr = units.find_unit_ptr(receiver_loc)) {
callable.add("other", wfl::variant(std::make_shared<wfl::unit_callable>(*uptr)));
}
return formula_handler(wfl::formula(s, new wfl::gamestate_function_symbol_table), callable);
} catch(const wfl::formula_error& e) {
lg::wml_error() << "Formula error in ability or weapon special: " << e.type << " at " << e.filename << ':' << e.line << ")\n";
return def;
}
}));
}
}
template<typename TComp>
std::pair<int,map_location> unit_ability_list::get_extremum(const std::string& key, int def, const TComp& comp) const
{
if ( cfgs_.empty() ) {
return std::pair(def, map_location());
}
// The returned location is the best non-cumulative one, if any,
// the best absolute cumulative one otherwise.
map_location best_loc;
bool only_cumulative = true;
int abs_max = 0;
int flat = 0;
int stack = 0;
for (const unit_ability& p : cfgs_)
{
int value = get_single_ability_value((*p.ability_cfg)[key], def, p, loc(), const_attack_ptr(), [&](const wfl::formula& formula, wfl::map_formula_callable& callable) {
return formula.evaluate(callable).as_int();
});
if ((*p.ability_cfg)["cumulative"].to_bool()) {
stack += value;
if (value < 0) value = -value;
if (only_cumulative && !comp(value, abs_max)) {
abs_max = value;
best_loc = p.teacher_loc;
}
} else if (only_cumulative || comp(flat, value)) {
only_cumulative = false;
flat = value;
best_loc = p.teacher_loc;
}
}
return std::pair(flat + stack, best_loc);
}
template std::pair<int, map_location> unit_ability_list::get_extremum<std::less<int>>(const std::string& key, int def, const std::less<int>& comp) const;
template std::pair<int, map_location> unit_ability_list::get_extremum<std::greater<int>>(const std::string& key, int def, const std::greater<int>& comp) const;
/*
*
* [special]
* [swarm]
* name= _ "swarm"
* name_inactive= _ ""
* description= _ ""
* description_inactive= _ ""
* cumulative=no
* apply_to=self #self,opponent,defender,attacker,both
* #active_on=defense # or offense; omitting this means "both"
*
* swarm_attacks_max=4
* swarm_attacks_min=2
*
* [filter_self] // SUF
* ...
* [/filter_self]
* [filter_opponent] // SUF
* [filter_attacker] // SUF
* [filter_defender] // SUF
* [filter_adjacent] // SAUF
* [filter_adjacent_location] // SAUF + locs
* [/swarm]
* [/special]
*
*/
namespace {
struct special_match
{
std::string tag_name;
const config* cfg;
};
/**
* Gets the children of @parent (which should be the specials for an
* attack_type) and places the ones whose tag or id= matches @a id into
* @a tag_result and @a id_result.
*
* If @a just_peeking is set to true, then @a tag_result and @a id_result
* are not touched; instead the return value is used to indicate if any
* matching children were found.
*
* @returns true if @a just_peeking is true and a match was found;
* false otherwise.
*/
bool get_special_children(std::vector<special_match>& tag_result,
std::vector<special_match>& id_result,
const config& parent, const std::string& id,
bool just_peeking=false) {
for (const config::any_child &sp : parent.all_children_range())
{
if (just_peeking && (sp.key == id || sp.cfg["id"] == id)) {
return true; // peek succeeded; done
}
if(sp.key == id) {
special_match special = { sp.key, &sp.cfg };
tag_result.push_back(special);
}
if(sp.cfg["id"] == id) {
special_match special = { sp.key, &sp.cfg };
id_result.push_back(special);
}
}
return false;
}
bool get_special_children_id(std::vector<special_match>& id_result,
const config& parent, const std::string& id,
bool just_peeking=false) {
for (const config::any_child &sp : parent.all_children_range())
{
if (just_peeking && (sp.cfg["id"] == id)) {
return true; // peek succeeded; done
}
if(sp.cfg["id"] == id) {
special_match special = { sp.key, &sp.cfg };
id_result.push_back(special);
}
}
return false;
}
bool get_special_children_tags(std::vector<special_match>& tag_result,
const config& parent, const std::string& id,
bool just_peeking=false) {
for (const config::any_child &sp : parent.all_children_range())
{
if (just_peeking && (sp.key == id)) {
return true; // peek succeeded; done
}
if(sp.key == id) {
special_match special = { sp.key, &sp.cfg };
tag_result.push_back(special);
}
}
return false;
}
}
/**
* Returns whether or not @a *this has a special with a tag or id equal to
* @a special. If @a simple_check is set to true, then the check is merely
* for being present. Otherwise (the default), the check is for a special
* active in the current context (see set_specials_context), including
* specials obtained from the opponent's attack.
*/
bool attack_type::get_special_bool(const std::string& special, bool simple_check, bool special_id, bool special_tags) const
{
{
std::vector<special_match> special_tag_matches;
std::vector<special_match> special_id_matches;
if(special_id && special_tags){
if ( get_special_children(special_tag_matches, special_id_matches, specials_, special, simple_check) ) {
return true;
}
} else if(special_id && !special_tags){
if ( get_special_children_id(special_id_matches, specials_, special, simple_check) ) {
return true;
}
} else if(!special_id && special_tags){
if ( get_special_children_tags(special_tag_matches, specials_, special, simple_check) ) {
return true;
}
}
// If we make it to here, then either list.empty() or !simple_check.
// So if the list is not empty, then this is not a simple check and
// we need to check each special in the list to see if any are active.
if(special_tags){
for(const special_match& entry : special_tag_matches) {
if ( special_active(*entry.cfg, AFFECT_SELF, entry.tag_name) ) {
return true;
}
}
}
if(special_id){
for(const special_match& entry : special_id_matches) {
if ( special_active(*entry.cfg, AFFECT_SELF, entry.tag_name) ) {
return true;
}
}
}
}
// Skip checking the opponent's attack?
if ( simple_check || !other_attack_ ) {
return false;
}
std::vector<special_match> special_tag_matches;
std::vector<special_match> special_id_matches;
if(special_id && special_tags){
get_special_children(special_tag_matches, special_id_matches, other_attack_->specials_, special);
} else if(special_id && !special_tags){
get_special_children_id(special_id_matches, other_attack_->specials_, special);
} else if(!special_id && special_tags){
get_special_children_tags(special_tag_matches, other_attack_->specials_, special);
}
if(special_tags){
for(const special_match& entry : special_tag_matches) {
if ( other_attack_->special_active(*entry.cfg, AFFECT_OTHER, entry.tag_name) ) {
return true;
}
}
}
if(special_id){
for(const special_match& entry : special_id_matches) {
if ( other_attack_->special_active(*entry.cfg, AFFECT_OTHER, entry.tag_name) ) {
return true;
}
}
}
return false;
}
/**
* Returns the currently active specials as an ability list, given the current
* context (see set_specials_context).
*/
unit_ability_list attack_type::get_specials(const std::string& special) const
{
//log_scope("get_specials");
const map_location loc = self_ ? self_->get_location() : self_loc_;
unit_ability_list res(loc);
for(const config& i : specials_.child_range(special)) {
if(special_active(i, AFFECT_SELF, special)) {
res.emplace_back(&i, loc, loc);
}
}
if(!other_attack_) {
return res;
}
for(const config& i : other_attack_->specials_.child_range(special)) {
if(other_attack_->special_active(i, AFFECT_OTHER, special)) {
res.emplace_back(&i, other_loc_, other_loc_);
}
}
return res;
}
/**
* Returns a vector of names and descriptions for the specials of *this.
* Each std::pair in the vector has first = name and second = description.
*
* This uses either the active or inactive name/description for each special,
* based on the current context (see set_specials_context), provided
* @a active_list is not nullptr. Otherwise specials are assumed active.
* If the appropriate name is empty, the special is skipped.
*/
std::vector<std::pair<t_string, t_string>> attack_type::special_tooltips(
boost::dynamic_bitset<>* active_list) const
{
//log_scope("special_tooltips");
std::vector<std::pair<t_string, t_string>> res;
if ( active_list )
active_list->clear();
for (const config::any_child &sp : specials_.all_children_range())
{
if ( !active_list || special_active(sp.cfg, AFFECT_EITHER, sp.key) ) {
const t_string &name = sp.cfg["name"];
if (!name.empty()) {
res.emplace_back(name, sp.cfg["description"].t_str() );
if ( active_list )
active_list->push_back(true);
}
} else {
const t_string& name = default_value(sp.cfg, "name_inactive", "name").t_str();
if (!name.empty()) {
res.emplace_back(name, default_value(sp.cfg, "description_inactive", "description").t_str() );
active_list->push_back(false);
}
}
}
return res;
}
/**
* Returns a comma-separated string of active names for the specials of *this.
* Empty names are skipped.
*
* This excludes inactive specials if only_active is true. Whether or not a
* special is active depends on the current context (see set_specials_context)
* and the @a is_backstab parameter.
*/
std::string attack_type::weapon_specials(bool only_active, bool is_backstab) const
{
//log_scope("weapon_specials");
std::string res;
for (const config::any_child &sp : specials_.all_children_range())
{
const bool active = special_active(sp.cfg, AFFECT_EITHER, sp.key, is_backstab);
const std::string& name =
active
? sp.cfg["name"].str()
: default_value(sp.cfg, "name_inactive", "name").str();
if (!name.empty()) {
if (!res.empty()) res += ", ";
if (only_active && !active) res += font::span_color(font::inactive_details_color);
res += name;
if (only_active && !active) res += "</span>";
}
}
return res;
}
/**
* Sets the context under which specials will be checked for being active.
* This version is appropriate if both units in a combat are known.
* @param[in] weapon The weapon being considered.
* @param[in] self A reference to the unit with this weapon.
* @param[in] other A reference to the other unit in the combat.
* @param[in] unit_loc The location of the unit with this weapon.
* @param[in] other_loc The location of the other unit in the combat.
* @param[in] attacking Whether or not the unit with this weapon is the attacker.
* @param[in] other_attack The attack used by the other unit.
*/
attack_type::specials_context_t::specials_context_t(const attack_type& weapon,
const_attack_ptr other_attack,
unit_const_ptr self,
unit_const_ptr other,
const map_location& unit_loc,
const map_location& other_loc,
bool attacking)
: parent(weapon.shared_from_this())
{
weapon.self_ = self;
weapon.other_ = other;
weapon.self_loc_ = unit_loc;
weapon.other_loc_ = other_loc;
weapon.is_attacker_ = attacking;
weapon.other_attack_ = other_attack;
weapon.is_for_listing_ = false;
}
/**
* Sets the context under which specials will be checked for being active.
* This version is appropriate if there is no specific combat being considered.
* @param[in] weapon The weapon being considered.
* @param[in] self A reference to the unit with this weapon.
* @param[in] loc The location of the unit with this weapon.
* @param[in] attacking Whether or not the unit with this weapon is the attacker.
*/
attack_type::specials_context_t::specials_context_t(const attack_type& weapon, unit_const_ptr self, const map_location& loc, bool attacking)
: parent(weapon.shared_from_this())
{
weapon.self_ = self;
weapon.other_ = unit_ptr();
weapon.self_loc_ = loc;
weapon.other_loc_ = map_location::null_location();
weapon.is_attacker_ = attacking;
weapon.other_attack_ = nullptr;
weapon.is_for_listing_ = false;
}
/**
* Sets the context under which specials will be checked for being active.
* This version is appropriate for theoretical units of a particular type.
* @param[in] weapon The weapon being considered.
* @param[in] self_type A reference to the type of the unit with this weapon.
* @param[in] loc The location of the unit with this weapon.
* @param[in] attacking Whether or not the unit with this weapon is the attacker.
*/
attack_type::specials_context_t::specials_context_t(const attack_type& weapon, const unit_type& self_type, const map_location& loc, bool attacking)
: parent(weapon.shared_from_this())
{
UNUSED(self_type);
weapon.self_ = unit_ptr();
weapon.other_ = unit_ptr();
weapon.self_loc_ = loc;
weapon.other_loc_ = map_location::null_location();
weapon.is_attacker_ = attacking;
weapon.other_attack_ = nullptr;
weapon.is_for_listing_ = false;
}
attack_type::specials_context_t::specials_context_t(const attack_type& weapon, bool attacking)
: parent(weapon.shared_from_this())
{
weapon.is_for_listing_ = true;
weapon.is_attacker_ = attacking;
}
attack_type::specials_context_t::~specials_context_t()
{
if(was_moved) return;
parent->self_ = unit_ptr();
parent->other_ = unit_ptr();
parent->self_loc_ = map_location::null_location();
parent->other_loc_ = map_location::null_location();
parent->is_attacker_ = false;
parent->other_attack_ = nullptr;
parent->is_for_listing_ = false;
}
attack_type::specials_context_t::specials_context_t(attack_type::specials_context_t&& other)
: parent(other.parent)
{
other.was_moved = true;
}
/**
* Calculates the number of attacks this weapon has, considering specials.
* This returns two numbers because of the swarm special. The actual number of
* attacks depends on the unit's health and should be:
* min_attacks + (max_attacks - min_attacks) * (current hp) / (max hp)
* c.f. swarm_blows()
*/
void attack_type::modified_attacks(bool is_backstab, unsigned & min_attacks,
unsigned & max_attacks) const
{
// Apply [attacks].
unit_abilities::effect attacks_effect(get_special_ability("attacks"),
num_attacks(), is_backstab, shared_from_this());
int attacks_value = attacks_effect.get_composite_value();
if ( attacks_value < 0 ) {
attacks_value = num_attacks();
ERR_NG << "negative number of strikes after applying weapon specials" << std::endl;
}
// Apply [swarm].
unit_ability_list swarm_specials = get_special_ability("swarm");
if ( !swarm_specials.empty() ) {
min_attacks = std::max<int>(0, swarm_specials.highest("swarm_attacks_min").first);
max_attacks = std::max<int>(0, swarm_specials.highest("swarm_attacks_max", attacks_value).first);
} else {
min_attacks = max_attacks = attacks_value;
}
}
/**
* Returns the damage per attack of this weapon, considering specials.
*/
int attack_type::modified_damage(bool is_backstab) const
{
unit_abilities::effect dmg_effect(get_special_ability("damage"), damage(), is_backstab, shared_from_this());
int damage_value = dmg_effect.get_composite_value();
return damage_value;