app_list: Add search box and search result view for v2.

ui/app_list/search_box_model.h

+// Copyright (c) 2012 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 UI_APP_LIST_SEARCH_BOX_MODEL_H_
+#define UI_APP_LIST_SEARCH_BOX_MODEL_H_
+#pragma once
+
+#include "base/basictypes.h"
+#include "base/observer_list.h"
+#include "base/string16.h"
+#include "ui/app_list/app_list_export.h"
+#include "ui/gfx/image/image_skia.h"
+#include "ui/gfx/selection_model.h"
+
+namespace app_list {
+
+class SearchBoxModelObserver;
+
+// SearchBoxModel consisits of an icon, a hint text, a user text and a selection
+// model. The icon is rendered to the side of the query editor. The hint text
+// is used as query edit control's placeholder text and displayed when there is
+// no user text in the control. The selection model and the text represents the
+// text, cursor position and selected text in edit control.
+class APP_LIST_EXPORT SearchBoxModel {
+ public:
+  SearchBoxModel();
+  ~SearchBoxModel();
+
+  // Sets the icon on side of edit box.
+  void SetIcon(const gfx::ImageSkia& icon);
+
+  // Sets the hint text to display when there is in input.
+  void SetHintText(const string16& hint_text);
+
+  // Sets the selection model for the search box's Textfield.
+  void SetSelectionModel(const gfx::SelectionModel& sel);
+
+  // Sets the text for the search box's Textfield.
+  void SetText(const string16& text);
+
+  void AddObserver(SearchBoxModelObserver* observer);
+  void RemoveObserver(SearchBoxModelObserver* observer);
+
+  const gfx::ImageSkia& icon() const {
+    return icon_;
+  }
+
+  const string16& hint_text() const {
+    return hint_text_;
+  }
+
+  const gfx::SelectionModel& selection_model() const {
+    return selection_model_;
+  }
+
+  const string16& text() const {
+    return text_;
+  }
+
+ private:
+  gfx::ImageSkia icon_;
+  string16 hint_text_;
+
+  gfx::SelectionModel selection_model_;
+  string16 text_;
+
+  ObserverList<SearchBoxModelObserver> observers_;
+
+  DISALLOW_COPY_AND_ASSIGN(SearchBoxModel);
+};
+
+}  // namespace app_list
+
+#endif  // UI_APP_LIST_SEARCH_BOX_MODEL_H_