Revert "ZVISION: Remove ActionRestoreGame and loading of r.svr (restart slot)"

This reverts commit 9f642074ba8e17aa23b01bcee82b2293fe84f8f1, as it
broke the credits screen in ZGI.

This has been rewritten to use the common save code

engines/zvision/file/save_manager.cpp

@@ -130,12 +130,25 @@ void SaveManager::writeSaveGameHeader(Common::OutSaveFile *file, const Common::S
 	file->writeSint16LE(td.tm_min);
 }
 
-Common::Error SaveManager::loadGame(uint slot) {
-	Common::SeekableReadStream *saveFile = getSlotFile(slot);
-	if (saveFile == 0) {
-		return Common::kPathDoesNotExist;
+Common::Error SaveManager::loadGame(int slot) {
+	Common::SeekableReadStream *saveFile = NULL;
+	
+	if (slot >= 0) {
+		saveFile = getSlotFile(slot);
+	} else {
+		Common::File *saveFile = _engine->getSearchManager()->openFile("r.svr");
+		if (!saveFile) {
+			saveFile = new Common::File;
+			if (!saveFile->open("r.svr")) {
+				delete saveFile;
+				return Common::kPathDoesNotExist;
+			}
+		}
 	}
 
+	if (!saveFile)
+		return Common::kPathDoesNotExist;
+
 	// Read the header
 	SaveGameHeader header;
 	if (!readSaveGameHeader(saveFile, header)) {

engines/zvision/file/save_manager.h

@@ -91,7 +91,7 @@ public:
 	 *
 	 * @param slot    The save slot to load. Must be [1, 20]
 	 */
-	Common::Error loadGame(uint slot);
+	Common::Error loadGame(int slot);
 
 	Common::SeekableReadStream *getSlotFile(uint slot);
 	bool readSaveGameHeader(Common::SeekableReadStream *in, SaveGameHeader &header);

engines/zvision/scripting/actions.cpp

@@ -23,11 +23,12 @@
 #include "common/scummsys.h"
 #include "video/video_decoder.h"
 
+#include "zvision/scripting/actions.h"
+
 #include "zvision/zvision.h"
 #include "zvision/scripting/script_manager.h"
 #include "zvision/graphics/render_manager.h"
 #include "zvision/file/save_manager.h"
-#include "zvision/scripting/actions.h"
 #include "zvision/scripting/menu.h"
 #include "zvision/scripting/effects/timer_effect.h"
 #include "zvision/scripting/effects/music_effect.h"
@@ -797,6 +798,22 @@ bool ActionRandom::execute() {
 	return true;
 }
 
+//////////////////////////////////////////////////////////////////////////////
+// ActionRestoreGame
+//////////////////////////////////////////////////////////////////////////////
+
+ActionRestoreGame::ActionRestoreGame(ZVision *engine, int32 slotkey, const Common::String &line) :
+	ResultAction(engine, slotkey) {
+	char buf[128];
+	sscanf(line.c_str(), "%s", buf);
+	_fileName = Common::String(buf);
+}
+
+bool ActionRestoreGame::execute() {
+	_engine->getSaveManager()->loadGame(-1);
+	return false;
+}
+
 //////////////////////////////////////////////////////////////////////////////
 // ActionRotateTo
 //////////////////////////////////////////////////////////////////////////////

engines/zvision/scripting/actions.h

@@ -340,6 +340,15 @@ private:
 	ValueSlot *_max;
 };
 
+class ActionRestoreGame : public ResultAction {
+public:
+	ActionRestoreGame(ZVision *engine, int32 slotkey, const Common::String &line);
+	bool execute();
+
+private:
+	Common::String _fileName;
+};
+
 class ActionRotateTo : public ResultAction {
 public:
 	ActionRotateTo(ZVision *engine, int32 slotkey, const Common::String &line);

engines/zvision/scripting/scr_file_handling.cpp

@@ -271,8 +271,8 @@ void ScriptManager::parseResults(Common::SeekableReadStream &stream, Common::Lis
 					actionList.push_back(new ActionRegion(_engine, slot, args));
 				} else if (act.matchString("restore_game", true)) {
 					// Only used by ZGI to load the restart game slot, r.svr.
-					_engine->getScriptManager()->reset();
-					_engine->getScriptManager()->changeLocation('g', 'a', 'r', 'y', 0);
+					// Used by the credits screen.
+					actionList.push_back(new ActionRestoreGame(_engine, slot, args));
 				} else if (act.matchString("rotate_to", true)) {
 					actionList.push_back(new ActionRotateTo(_engine, slot, args));
 				} else if (act.matchString("save_game", true)) {

engines/zvision/scripting/script_manager.cpp

@@ -686,7 +686,7 @@ void ScriptManager::serialize(Common::WriteStream *stream) {
 		stream->writeSint16LE(getStateValue(i));
 }
 
-void ScriptManager::reset() {
+void ScriptManager::deserialize(Common::SeekableReadStream *stream) {
 	// Clear out the current table values
 	_globalState.clear();
 	_globalStateFlags.clear();
@@ -706,10 +706,6 @@ void ScriptManager::reset() {
 	_activeSideFx.clear();
 
 	_referenceTable.clear();
-}
-
-void ScriptManager::deserialize(Common::SeekableReadStream *stream) {
-	reset();
 
 	if (stream->readUint32BE() != MKTAG('Z', 'N', 'S', 'G') || stream->readUint32LE() != 4) {
 		changeLocation('g', 'a', 'r', 'y', 0);

engines/zvision/scripting/script_manager.h

@@ -248,7 +248,6 @@ public:
 
 	void serialize(Common::WriteStream *stream);
 	void deserialize(Common::SeekableReadStream *stream);
-	void reset();
 
 	Location getCurrentLocation() const;
 	Location getLastLocation();