add the names of the abilities used as weapons in the attack prediction window (#5864)

Now, if a weapon is affected by an ability used as a weapon, the name will appear as if it was a classic special.

changelog.md

@@ -11,6 +11,7 @@
    * Updated translations: Bulgarian, Chinese (Traditional), Czech, Italian, Portuguese (Brazil), Russian, Spanish, Turkish
  ### Units
  ### User interface
+   * The names of the abilities used as specials appear in the attack prediction window with specials weapons
    * Added a prompt to allow migrating settings and redownloading add-ons used in a previous version of Wesnoth when starting a new versions for the first time.
  ### WML Engine
  ### Miscellaneous and Bug Fixes

src/units/abilities.cpp

@@ -854,6 +854,45 @@ std::string attack_type::weapon_specials(bool only_active, bool is_backstab) con
 		}
 	}
 
+	assert(display::get_singleton());
+	const unit_map& units = display::get_singleton()->get_units();
+	if(self_){
+		std::set<std::string> checking_name;
+		for (const config::any_child sp : (*self_).abilities().all_children_range()){
+			const bool active = check_self_abilities_impl(shared_from_this(), other_attack_, sp.cfg, self_, self_loc_, AFFECT_EITHER, sp.key);
+
+			const std::string& name = active ? sp.cfg["name"].str() : "";
+
+			if (!name.empty() && checking_name.count(name) == 0) {
+				checking_name.insert(name);
+				if (!res.empty()){
+					res += ", ";
+				}
+				res += name;
+			}
+		}
+		const auto adjacent = get_adjacent_tiles(self_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;
+			if(&*it == self_.get())
+				continue;
+			for (const config::any_child sp : (*it).abilities().all_children_range()){
+				const bool active = check_adj_abilities_impl(shared_from_this(), other_attack_, sp.cfg, self_, *it, i, self_loc_, AFFECT_EITHER, sp.key);
+
+				const std::string& name = active ? sp.cfg["name"].str() : "";
+
+				if (!name.empty() && checking_name.count(name) == 0) {
+					checking_name.insert(name);
+					if (!res.empty()){
+						res += ", ";
+					}
+					res += name;
+				}
+			}
+		}
+	}
 	return res;
 }