Don't use PS::Loader::Task outside of Loader

PS::Loader::Task is made for the Loader and it's combersome to use it
outside. Also there is an overhead.

source/graphics/MapReader.cpp

@@ -79,6 +79,7 @@
 #include <atomic>
 #include <functional>
 #include <js/PropertyAndElement.h>
+#include <numeric>
 #include <ranges>
 #include <string>
 #include <string_view>
@@ -487,7 +488,7 @@ public:
 	CXeromyces xmb_file;
 	XMBElementList nodes; // children of root
 
-	PS::Loader::Task ReadEntities(XMBElement parent);
+	void ReadEntities(XMBElement parent, CSimulation2& sim);
 
 private:
 
@@ -509,9 +510,6 @@ private:
 	int at_seed;
 	int at_turret;
 
-	// # entities+nonentities processed and total (for progress calc)
-	int completed_jobs, total_jobs;
-
 	// maximum used entity ID, so we can safely allocate new ones
 	entity_id_t max_uid;
 
@@ -559,13 +557,6 @@ void CXMLReader::Init(const VfsPath& xml_filename)
 	ENSURE(xmb_file.GetElementStringView(root.GetNodeName()) == "Scenario");
 	nodes = root.GetChildNodes();
 
-	// find out total number of entities+nonentities
-	// (used when calculating progress)
-	completed_jobs = 0;
-	total_jobs = 0;
-	for (XMBElement node : nodes)
-		total_jobs += node.GetChildNodes().size();
-
 	// Find the maximum entity ID, so we can safely allocate new IDs without conflicts
 
 	max_uid = SYSTEM_ENTITY;
@@ -995,16 +986,8 @@ void CXMLReader::ReadTriggers(XMBElement /*parent*/)
 {
 }
 
-PS::Loader::Task CXMLReader::ReadEntities(XMBElement parent)
+void CXMLReader::ReadEntities(XMBElement entity, CSimulation2& sim)
 {
-	XMBElementList entities = parent.GetChildNodes();
-
-	ENSURE(m_MapReader.pSimulation2);
-	CSimulation2& sim = *m_MapReader.pSimulation2;
-	CmpPtr<ICmpPlayerManager> cmpPlayerManager(sim, SYSTEM_ENTITY);
-
-	for (XMBElement entity : entities)
-	{
 	ENSURE(entity.GetNodeName() == el_entity);
 
 	XMBAttributeList attrs = entity.GetAttributes();
@@ -1104,25 +1087,21 @@ PS::Loader::Task CXMLReader::ReadEntities(XMBElement parent)
 			debug_warn(L"Invalid map XML data");
 	}
 
+	CmpPtr<ICmpPlayerManager> cmpPlayerManager(sim, SYSTEM_ENTITY);
 	entity_id_t player = cmpPlayerManager->GetPlayerByID(PlayerID);
 	CmpPtr<ICmpPlayer> cmpPlayer(sim, player);
 
 	// Don't add entities for removed players.
 	if (cmpPlayer && cmpPlayer->IsRemoved())
-		{
-			completed_jobs++;
-			co_yield 100 * completed_jobs / total_jobs;
-			continue;
-		}
+		return;
 
 	entity_id_t ent = sim.AddEntity(TemplateName, EntityUid);
 	if (ent == INVALID_ENTITY || player == INVALID_ENTITY)
 	{
 		// Don't add entities with invalid player IDs
 		LOGERROR("Failed to load entity template '%s'", utf8_from_wstring(TemplateName));
+		return;
 	}
-		else
-		{
 	CmpPtr<ICmpPosition> cmpPosition(sim, ent);
 	if (cmpPosition)
 	{
@@ -1179,13 +1158,6 @@ PS::Loader::Task CXMLReader::ReadEntities(XMBElement parent)
 		// Focus on civil centre or first entity owned by player
 		m_MapReader.m_StartingCameraTarget = ent;
 	}
-		}
-
-		completed_jobs++;
-		co_yield 100 * completed_jobs / total_jobs;
-	}
-
-	co_return 0;
 }
 
 void CXMLReader::ReadXML()
@@ -1281,26 +1253,32 @@ int CMapReader::ReadXML()
 // progressive
 PS::Loader::Task CMapReader::ReadXMLEntities()
 {
+	ENSURE(pSimulation2);
 	if (m_SkipEntities)
 		co_return 0;
 
 	if (!m_XmlReader)
 		m_XmlReader = std::make_unique<CXMLReader>(m_FilenameXml, *this);
 
+	const std::size_t totalJobs{std::transform_reduce(m_XmlReader->nodes.begin(),
+		m_XmlReader->nodes.end(), static_cast<std::size_t>(0), std::plus<>{}, [](XMBElement node)
+	{
+		return node.GetChildNodes().size();
+	})};
+	std::size_t completedJobs{0};
 	for (XMBElement node : m_XmlReader->nodes)
 	{
 		CStr name = m_XmlReader->xmb_file.GetElementString(node.GetNodeName());
 		if (name != "Entities")
 			continue;
 
-		PS::Loader::Task subTask{m_XmlReader->ReadEntities(node)};
-		while (!subTask.IsDone())
+		for (XMBElement child : node.GetChildNodes())
 		{
-			co_yield subTask.GetProgress();
-			subTask.Step(-1);
+			m_XmlReader->ReadEntities(child, *pSimulation2);
+
+			completedJobs++;
+			co_yield 100 * completedJobs / totalJobs;
 		}
-		if (subTask.Get() < 0)
-			co_return subTask.Get();
 	}
 
 	m_XmlReader.reset();