1 files changed, 52 insertions, 0 deletions
diff --git a/chrome/browser/ui/cocoa/previewable_contents_controller.mm b/chrome/browser/ui/cocoa/previewable_contents_controller.mm
new file mode 100644
index 0000000..2dfa146
--- /dev/null
+++ b/chrome/browser/ui/cocoa/previewable_contents_controller.mm
@@ -0,0 +1,52 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#import "chrome/browser/ui/cocoa/previewable_contents_controller.h"
+
+#include "base/logging.h"
+#include "base/mac_util.h"
+#include "chrome/browser/tab_contents/tab_contents.h"
+
+@implementation PreviewableContentsController
+
+@synthesize activeContainer = activeContainer_;
+
+- (id)init {
+  if ((self = [super initWithNibName:@"PreviewableContents"
+                              bundle:mac_util::MainAppBundle()])) {
+  }
+  return self;
+}
+
+- (void)showPreview:(TabContents*)preview {
+  DCHECK(preview);
+
+  // Remove any old preview contents before showing the new one.
+  if (previewContents_)
+    [previewContents_->GetNativeView() removeFromSuperview];
+
+  previewContents_ = preview;
+  NSView* previewView = previewContents_->GetNativeView();
+  [previewView setFrame:[[self view] bounds]];
+
+  // Hide the active container and add the preview contents.
+  [activeContainer_ setHidden:YES];
+  [[self view] addSubview:previewView];
+}
+
+- (void)hidePreview {
+  DCHECK(previewContents_);
+
+  // Remove the preview contents and reshow the active container.
+  [previewContents_->GetNativeView() removeFromSuperview];
+  [activeContainer_ setHidden:NO];
+
+  previewContents_ = nil;
+}
+
+- (BOOL)isShowingPreview {
+  return previewContents_ != nil;
+}
+
+@end