ALL: Add MetaEngine::simpleSaveNames()

Engines with "simple" savenames would support "Run in background" in
save/load dialog and gradual save slots unlocking. Other engines
save/load feature would be locked until save sync is over.

2 files changed, 3 insertions, 0 deletions

diff --git a/engines/prince/detection.h b/engines/prince/detection.h
index 3076253cf5..39cfdd96e7 100644
--- a/engines/prince/detection.h
+++ b/engines/prince/detection.h
@@ -121,6 +121,7 @@ public:
 	virtual bool hasFeature(MetaEngineFeature f) const;
 	virtual int getMaximumSaveSlot() const;
 	virtual SaveStateList listSaves(const char *target) const;
+	virtual bool simpleSaveNames() const;
 	SaveStateDescriptor querySaveMetaInfos(const char *target, int slot) const;
 	virtual void removeSaveState(const char *target, int slot) const;
 };
diff --git a/engines/prince/saveload.cpp b/engines/prince/saveload.cpp
index d3360badd1..2855bdc4bd 100644
--- a/engines/prince/saveload.cpp
+++ b/engines/prince/saveload.cpp
@@ -105,6 +105,8 @@ SaveStateList PrinceMetaEngine::listSaves(const char *target) const {
 	return saveList;
 }
 
+bool PrinceMetaEngine::simpleSaveNames() const { return true; }
+
 SaveStateDescriptor PrinceMetaEngine::querySaveMetaInfos(const char *target, int slot) const {
 	Common::String fileName = Common::String::format("%s.%03d", target, slot);
 	Common::InSaveFile *f = g_system->getSavefileManager()->openForLoading(fileName);