Added a new SaveStateDescriptor flag, is_write_protected, which can be used to stop the user from overwriting certain saves (e.g. the auto save, the restart save in the Kyrandia games, the quicksaves etc)

svn-id: r34970

3 files changed, 14 insertions, 2 deletions

diff --git a/engines/game.cpp b/engines/game.cpp
index 5011685412..3e6cdc2e79 100644
--- a/engines/game.cpp
+++ b/engines/game.cpp
@@ -115,6 +115,10 @@ void SaveStateDescriptor::setDeletableFlag(bool state) {
 	setVal("is_deletable", state ? "true" : "false");
 }
 
+void SaveStateDescriptor::setWriteProtectedFlag(bool state) {
+	setVal("is_write_protected", state ? "true" : "false");
+}
+
 void SaveStateDescriptor::setSaveDate(int year, int month, int day) {
 	char buffer[32];
 	snprintf(buffer, 32, "%.2d.%.2d.%.4d", day, month, year);
diff --git a/engines/game.h b/engines/game.h
index 9a8c25e35b..21bfbce0f5 100644
--- a/engines/game.h
+++ b/engines/game.h
@@ -151,12 +151,18 @@ public:
 	bool getBool(const Common::String &key) const;
 
 	/**
-	 * Sets the 'is_deletable' key, which indicates, if the
+	 * Sets the 'is_deletable' key, which indicates if the
 	 * given savestate is safe for deletion.
 	 */
 	void setDeletableFlag(bool state);
 
 	/**
+	 * Sets the 'is_write_protected' key, which indicates if the
+	 * given savestate can be overwritten or not
+	 */
+	void setWriteProtectedFlag(bool state);
+
+	/**
 	 * Return a thumbnail graphics surface representing the savestate visually.
 	 * This is usually a scaled down version of the game graphics. The size
 	 * should be either 160x100 or 160x120 pixels, depending on the aspect
diff --git a/gui/launcher.cpp b/gui/launcher.cpp
index c11cc58ae1..3f569c22bb 100644
--- a/gui/launcher.cpp
+++ b/gui/launcher.cpp
@@ -673,11 +673,13 @@ void SaveLoadChooser::updateSelection(bool redraw) {
 	int selItem = _list->getSelected();
 
 	bool isDeletable = _delSupport;
+	bool isWriteProtected = false;
 
 	if (selItem >= 0 && !_list->getSelectedString().empty() && _metaInfoSupport) {
 		SaveStateDescriptor desc = (*_plugin)->querySaveMetaInfos(_target.c_str(), atoi(_saveList[selItem].save_slot().c_str()));
 
 		isDeletable = desc.getBool("is_deletable") && _delSupport;
+		isWriteProtected = desc.getBool("is_write_protected");
 
 		if (_thumbnailSupport) {
 			const Graphics::Surface *thumb = desc.getThumbnail();
@@ -720,7 +722,7 @@ void SaveLoadChooser::updateSelection(bool redraw) {
 
 	// Disable these buttons if nothing is selected, or if an empty
 	// list item is selected.
-	_chooseButton->setEnabled(selItem >= 0 && (!_list->getSelectedString().empty()));
+	_chooseButton->setEnabled(selItem >= 0 && (!_list->getSelectedString().empty()) && !isWriteProtected);
 	// Delete will always be disabled if the engine doesn't support it.
 	_deleteButton->setEnabled(isDeletable && (selItem >= 0) && (!_list->getSelectedString().empty()));