alternate ntp: implement right-aligned search token

chrome/browser/ui/views/location_bar/search_token_view.h

+// Copyright (c) 2013 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_UI_VIEWS_LOCATION_BAR_SEARCH_TOKEN_VIEW_H_
+#define CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_SEARCH_TOKEN_VIEW_H_
+
+#include "base/compiler_specific.h"
+#include "ui/gfx/size.h"
+#include "ui/views/view.h"
+
+namespace gfx {
+class Font;
+}
+namespace views {
+class Label;
+}
+
+// SearchTokenView is used by the location bar view to display a search token to
+// the user when the omnibox replaces the url with its query terms.
+// Internally SearchTokenView uses a label to render the text.
+// right.
+class SearchTokenView : public views::View {
+ public:
+  SearchTokenView();
+  virtual ~SearchTokenView();
+
+  void SetFont(const gfx::Font& font);
+
+  void SetBackgroundColor(SkColor color);
+
+  void SetForegroundColor(SkColor color);
+
+  // Set the search provider.
+  // If |search_provider| is empty, this decoration is removed.
+  void SetSearchProvider(const string16& search_provider);
+
+  bool has_search_provider() const {
+    return !search_provider_.empty();
+  }
+
+  virtual gfx::Size GetPreferredSize() OVERRIDE;
+  virtual void Layout() OVERRIDE;
+
+ protected:
+  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
+
+ private:
+  views::Label* label_;
+  string16 search_provider_;
+
+  DISALLOW_COPY_AND_ASSIGN(SearchTokenView);
+};
+
+#endif  // CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_SEARCH_TOKEN_VIEW_H_