[Refactor] Move code for painting the window header for browser windows out of ash

ash/frame/default_header_painter.h

+// Copyright 2014 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 ASH_FRAME_DEFAULT_HEADER_PAINTER_H_
+#define ASH_FRAME_DEFAULT_HEADER_PAINTER_H_
+
+#include "ash/ash_export.h"
+#include "ash/frame/header_painter.h"
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"  // OVERRIDE
+#include "base/gtest_prod_util.h"
+#include "base/memory/scoped_ptr.h"
+#include "ui/gfx/animation/animation_delegate.h"
+
+namespace gfx {
+class Rect;
+class SlideAnimation;
+}
+namespace views {
+class View;
+class Widget;
+}
+
+namespace ash {
+class FrameCaptionButtonContainerView;
+
+// Helper class for painting the default window header.
+class ASH_EXPORT DefaultHeaderPainter : public HeaderPainter,
+                                        public gfx::AnimationDelegate {
+ public:
+  DefaultHeaderPainter();
+  virtual ~DefaultHeaderPainter();
+
+  // DefaultHeaderPainter does not take ownership of any of the parameters.
+  void Init(views::Widget* frame,
+            views::View* header_view,
+            views::View* window_icon,
+            FrameCaptionButtonContainerView* caption_button_container);
+
+  // HeaderPainter overrides:
+  virtual int GetMinimumHeaderWidth() const OVERRIDE;
+  virtual void PaintHeader(gfx::Canvas* canvas, Mode mode) OVERRIDE;
+  virtual void LayoutHeader() OVERRIDE;
+  virtual int GetHeaderHeightForPainting() const OVERRIDE;
+  virtual void SetHeaderHeightForPainting(int height) OVERRIDE;
+  virtual void SchedulePaintForTitle() OVERRIDE;
+
+ private:
+  FRIEND_TEST_ALL_PREFIXES(DefaultHeaderPainterTest, TitleIconAlignment);
+
+  // gfx::AnimationDelegate override:
+  virtual void AnimationProgressed(const gfx::Animation* animation) OVERRIDE;
+
+  // Paints highlight around the edge of the header for inactive restored
+  // windows.
+  void PaintHighlightForInactiveRestoredWindow(gfx::Canvas* canvas);
+
+  // Paints the title bar, primarily the title string.
+  void PaintTitleBar(gfx::Canvas* canvas);
+
+  // Paints the header/content separator.
+  void PaintHeaderContentSeparator(gfx::Canvas* canvas);
+
+  // Returns the header bounds in the coordinates of |view_|. The header is
+  // assumed to be positioned at the top left corner of |view_| and to have the
+  // same width as |view_|.
+  gfx::Rect GetLocalBounds() const;
+
+  // Returns the bounds for the title.
+  gfx::Rect GetTitleBounds() const;
+
+  views::Widget* frame_;
+  views::View* view_;
+  views::View* window_icon_;  // May be NULL.
+  FrameCaptionButtonContainerView* caption_button_container_;
+
+  // The height of the header including the header/content separator.
+  int height_;
+
+  // Whether the header should be painted as active.
+  Mode mode_;
+
+  // Whether the header is painted for the first time.
+  bool initial_paint_;
+
+  scoped_ptr<gfx::SlideAnimation> activation_animation_;
+
+  DISALLOW_COPY_AND_ASSIGN(DefaultHeaderPainter);
+};
+
+}  // namespace ash
+
+#endif  // ASH_FRAME_DEFAULT_HEADER_PAINTER_H_