1 files changed, 69 insertions, 0 deletions
diff --git a/cocoa/ScrollableView.m b/cocoa/ScrollableView.m
new file mode 100644
index 000000000..d50ce5a15
--- /dev/null
+++ b/cocoa/ScrollableView.m
@@ -0,0 +1,69 @@
+/*
+ * Copyright 2011 Sven Weidauer <sven.weidauer@gmail.com>
+ *
+ * This file is part of NetSurf, http://www.netsurf-browser.org/
+ *
+ * NetSurf 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; version 2 of the License.
+ *
+ * NetSurf 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#import "ScrollableView.h"
+
+@interface ScrollableView ()
+
+- (void) adjustFrame;
+- (void) frameChangeNotification: (NSNotification *) note;
+
+@end
+
+@implementation ScrollableView
+@synthesize minimumSize;
+
+- (void) setMinimumSize: (NSSize)newSize;
+{
+	minimumSize = newSize;
+	[self adjustFrame];
+}
+
+- (void) adjustFrame;
+{
+	NSSize frameSize = [[self superview] frame].size;
+	[self setFrameSize: NSMakeSize( MAX( minimumSize.width, frameSize.width ),
+								   MAX( minimumSize.height, frameSize.height ) )];
+}
+
+- (void) frameChangeNotification: (NSNotification *) note;
+{
+	[self adjustFrame];
+}
+
+- (void) viewDidMoveToSuperview;
+{
+	if (observedSuperview) {
+		[[NSNotificationCenter defaultCenter] removeObserver: self 
+														name: NSViewFrameDidChangeNotification 
+													  object: observedSuperview];
+		observedSuperview = nil;
+	}
+	
+	NSView *newSuperView = [self superview];
+	
+	if (nil != newSuperView) {
+		observedSuperview = newSuperView;
+		[[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(frameChangeNotification:)
+													 name: NSViewFrameDidChangeNotification
+												   object: observedSuperview];
+		[observedSuperview setPostsFrameChangedNotifications: YES];
+	}
+}
+
+@end