Mac: Add favicons to task manager.

Pull NSImage cache out of search engine dialog into its own class, reuse that.

Implement browser icon code in task_manager_resource_provider's browser resource provider.

BUG=13156
TEST=Open task manager. You should see icons. Open search engine manager, should still show icons.

Review URL: http://codereview.chromium.org/549021

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@36087 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 50 insertions, 0 deletions

diff --git a/chrome/browser/cocoa/table_row_nsimage_cache.h b/chrome/browser/cocoa/table_row_nsimage_cache.h
new file mode 100644
index 0000000..04ca13e
--- /dev/null
+++ b/chrome/browser/cocoa/table_row_nsimage_cache.h
@@ -0,0 +1,50 @@
+// 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.
+
+#ifndef CHROME_BROWSER_COCOA_TABLE_ROW_NSIMAGE_CACHE_H_
+#define CHROME_BROWSER_COCOA_TABLE_ROW_NSIMAGE_CACHE_H_
+
+#import <Cocoa/Cocoa.h>
+
+#include "base/scoped_nsobject.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+
+// There are several dialogs that display tabular data with one SkBitmap
+// per row. This class converts these SkBitmaps to NSImages on demand, and
+// caches the results.
+class TableRowNSImageCache {
+ public:
+   // Interface this cache expects for its table model.
+   class Table {
+    public:
+     // Returns the number of rows in the table.
+     virtual int RowCount() const = 0;
+
+     // Returns the icon of the |row|th row.
+     virtual SkBitmap GetIcon(int row) const = 0;
+   };
+
+  // |model| must outlive the cache.
+  explicit TableRowNSImageCache(Table* model);
+
+  // Lazily converts the image at the given row and caches it in |icon_images_|.
+  NSImage* GetImageForRow(int row);
+   
+  // Call these functions every time the table changes, to update the cache.
+  void OnModelChanged();
+  void OnItemsChanged(int start, int length);
+  void OnItemsAdded(int start, int length);
+  void OnItemsRemoved(int start, int length);
+
+ private:
+  // The table model we query for row count and icons.
+  Table* model_;  // weak
+
+  // Stores strong NSImage refs for icons. If an entry is NULL, it will be
+  // created in GetImageForRow().
+  scoped_nsobject<NSPointerArray> icon_images_;
+};
+
+#endif  // CHROME_BROWSER_COCOA_TABLE_ROW_NSIMAGE_CACHE_H_
+