1 files changed, 49 insertions, 0 deletions
diff --git a/Sources/Data/OwlSelection.h b/Sources/Data/OwlSelection.h
new file mode 100644
index 0000000..327bfdb
--- /dev/null
+++ b/Sources/Data/OwlSelection.h
@@ -0,0 +1,49 @@
+/* This file is part of Owl.
+ *
+ * Copyright © 2019-2021 Sergey Bugaev <bugaevc@gmail.com>
+ *
+ * Owl 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 3 of the License,
+ * or (at your option) any later version.
+ *
+ * Owl 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 Owl.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#import "OwlDataSource.h"
+#import "OwlFeatures.h"
+#import <Cocoa/Cocoa.h>
+
+@class OwlDataDevice;
+
+// A selection represents a "place" or a "slot" where data can be copied to
+// and pasted from. One selection can only hold one data source at a time.
+//
+// There's a single global selection that represents the system clipboard.
+// On GNUstep, there's additionally the primary selection.
+@interface OwlSelection : NSObject <OwlDataSourceHolder> {
+    OwlDataSource *_dataSource;
+    NSMutableArray *_dataDevices;
+}
+
++ (OwlSelection *) clipboard;
+#ifdef OWL_PLATFORM_GNUSTEP
++ (OwlSelection *) primary;
+#endif
+
+// Get and set the contents of the selction, as a data source.
+- (OwlDataSource *) dataSource;
+- (void) setDataSource: (OwlDataSource *) dataSource;
+
+// Subscribe and unsubscribe data devices.
+// OwlSelection will call -selectionChanged: on the registered data devices.
+- (void) addDataDevice: (OwlDataDevice *) dataDevice;
+- (void) removeDataDevice: (OwlDataDevice *) dataDevice;
+
+@end