Added some MetaEngineFeatures, defined MEFs for the Scumm engine

svn-id: r33893

3 files changed, 48 insertions, 2 deletions

diff --git a/engines/metaengine.h b/engines/metaengine.h
index aef860e0f9..0d8a4a15c9 100644
--- a/engines/metaengine.h
+++ b/engines/metaengine.h
@@ -91,6 +91,44 @@ public:
 	virtual SaveStateList listSaves(const char *target) const {
 		return SaveStateList();
 	}
+
+	/**
+	 * Remove the specified save state. 
+	 *
+	 * For most engines this just involves a call removeSaveFile().  
+	 * Engines which keep an index file will also update it accordingly.
+	 *
+	 * @param slot		slot number of the save state to be removed
+	 * @param saveNames	a list of all the save state description names
+	 */
+	virtual void removeSaveState(int slot, Common::StringList saveNames) const {};
+
+	
+	/** @name MetaEngineFeature flags */
+	//@{
+	
+	/**
+	 * A feature in this context means an ability of the engine which can be
+	 * either on or off.  Examples include:
+	 *  - Listing Save States (--list-saves)
+	 *  - Loading from the Launcher (-x)
+	 *  - Deleting Saves from the Launcher
+	 *
+	 *  These determine whether the features will be available to the engine
+	 *  in the launcher.
+	 */
+	enum MetaEngineFeature {
+		kSupportsListSaves,
+		kSupportsDirectLoad,
+		kSupportsDeleteSave
+	};	
+
+	/**
+	 * Determine whether the engine supports the specified feature
+	 */	
+	virtual bool hasFeature(MetaEngineFeature f) { return false; };
+
+	//@}
 };
 
 
diff --git a/engines/scumm/detection.cpp b/engines/scumm/detection.cpp
index 68d3010199..716a456c90 100644
--- a/engines/scumm/detection.cpp
+++ b/engines/scumm/detection.cpp
@@ -677,6 +677,7 @@ public:
 	virtual GameList getSupportedGames() const;
 	virtual GameDescriptor findGame(const char *gameid) const;
 	virtual GameList detectGames(const FSList &fslist) const;
+	virtual bool hasFeature(MetaEngineFeature f);
 
 	virtual PluginError createInstance(OSystem *syst, Engine **engine) const;
 
@@ -691,6 +692,12 @@ GameDescriptor ScummMetaEngine::findGame(const char *gameid) const {
 	return Common::AdvancedDetector::findGameID(gameid, gameDescriptions, obsoleteGameIDsTable);
 }
 
+bool ScummMetaEngine::hasFeature(MetaEngineFeature f) {
+	return
+		(f == kSupportsListSaves) ||
+		(f == kSupportsDirectLoad) ||
+		(f == kSupportsDeleteSave);
+}
 
 GameList ScummMetaEngine::detectGames(const FSList &fslist) const {
 	GameList detectedGames;
diff --git a/gui/launcher.cpp b/gui/launcher.cpp
index bcf4709e78..dc3c2ee1d5 100644
--- a/gui/launcher.cpp
+++ b/gui/launcher.cpp
@@ -951,7 +951,8 @@ void LauncherDialog::loadGame(int item) {
 	int idx;
 	if (plugin) {
 		do {
-			_loadDialog->setList(generateSavegameList(item, plugin));
+			Common::StringList saveNames = generateSavegameList(item, plugin);
+			_loadDialog->setList(saveNames);
 			SaveStateList saveList = (*plugin)->listSaves(description.c_str());
 			idx = _loadDialog->runModal();
 			if (idx >= 0) {
@@ -959,7 +960,7 @@ void LauncherDialog::loadGame(int item) {
 				if (_loadDialog->delSave()) {
 					String filename = saveList[idx].filename();
 					printf("Deleting file: %s\n", filename.c_str());
-					saveFileMan->removeSavefile(filename.c_str());
+					//saveFileMan->removeSavefile(filename.c_str());
 				}
 				// Load the savegame
 				else {