1 files changed, 80 insertions, 0 deletions
diff --git a/engines/wintermute/debugger/listing_providers/cached_source_listing_provider.cpp b/engines/wintermute/debugger/listing_providers/cached_source_listing_provider.cpp
new file mode 100644
index 0000000000..20fe708380
--- /dev/null
+++ b/engines/wintermute/debugger/listing_providers/cached_source_listing_provider.cpp
@@ -0,0 +1,80 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "cached_source_listing_provider.h"
+#include "basic_source_listing_provider.h"
+#include "blank_listing_provider.h"
+#include "source_listing.h"
+
+namespace Wintermute {
+
+CachedSourceListingProvider::CachedSourceListingProvider() {
+	_sourceListingProvider = new BasicSourceListingProvider();
+	_fallbackListingProvider = new BlankListingProvider();
+}
+
+CachedSourceListingProvider::~CachedSourceListingProvider() {
+	delete _sourceListingProvider;
+	delete _fallbackListingProvider;
+	for (Common::HashMap<Common::String, SourceListing*>::iterator it = _cached.begin();
+			it != _cached.end(); it++) {
+		delete (it->_value);
+	}
+}
+
+Listing *CachedSourceListingProvider::getListing(const Common::String &filename, Wintermute::ErrorCode &error) {
+	if (_cached.contains(filename)) {
+		error = OK;
+		SourceListing *copy = new SourceListing(*_cached.getVal(filename));
+		return copy;
+	} else {
+		ErrorCode inner;
+		SourceListing *res = _sourceListingProvider->getListing(filename, inner);
+		if (inner == OK) {
+			SourceListing *copy = new SourceListing(*res);
+			_cached.setVal(filename, copy); // The cached copy is deleted on destruction
+			return res;
+		} else {
+			delete res;
+			return _fallbackListingProvider->getListing(filename, error);
+		}
+	}
+}
+
+void CachedSourceListingProvider::invalidateCache() {
+	for (Common::HashMap<Common::String, SourceListing*>::iterator it = _cached.begin();
+			it != _cached.end(); it++) {
+		delete (it->_value);
+	}
+	_cached.clear();
+}
+
+ErrorCode CachedSourceListingProvider::setPath(const Common::String &path) {
+	invalidateCache();
+	return _sourceListingProvider->setPath(path);
+}
+
+Common::String CachedSourceListingProvider::getPath() const {
+	return _sourceListingProvider->getPath();
+}
+
+} // End of namespace Wintermute