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

ash/wm/header_painter.h

 // Copyright 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 ASH_WM_HEADER_PAINTER_H_
 #define ASH_WM_HEADER_PAINTER_H_
 
 #include "ash/ash_export.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"
-#include "ui/gfx/geometry/rect.h"
 
 namespace gfx {
 class Canvas;
-class FontList;
-class ImageSkia;
-class Point;
-class Size;
-class SlideAnimation;
-}
-namespace views {
-class View;
-class Widget;
 }
 
 namespace ash {
-class FrameCaptionButtonContainerView;
 
 // Helper class for painting the window header.
-class ASH_EXPORT HeaderPainter : public gfx::AnimationDelegate {
+class ASH_EXPORT HeaderPainter {
  public:
   enum Mode {
     MODE_ACTIVE,
     MODE_INACTIVE
   };
 
-  // TODO(pkotwicz): Move code related to "browser" windows out of ash.
-  enum Style {
-    // Header style used for browser windows.
-    STYLE_BROWSER,
-
-    // Header style used for apps and miscellaneous windows (e.g. task manager).
-    STYLE_OTHER
-  };
-
-  HeaderPainter();
-  virtual ~HeaderPainter();
-
-  // None of the parameters are owned.
-  void Init(Style style,
-            views::Widget* frame,
-            views::View* header_view,
-            views::View* window_icon,
-            FrameCaptionButtonContainerView* caption_button_container);
-
-  // Returns the bounds of the client view for a window with |header_height|
-  // and |window_bounds|. The return value and |window_bounds| are in the
-  // views::NonClientView's coordinates.
-  static gfx::Rect GetBoundsForClientView(int header_height,
-                                          const gfx::Rect& window_bounds);
-
-  // Returns the bounds of the window given |header_height| and |client_bounds|.
-  // The return value and |client_bounds| are in the views::NonClientView's
-  // coordinates.
-  static gfx::Rect GetWindowBoundsForClientBounds(
-      int header_height,
-      const gfx::Rect& client_bounds);
-
-  // Determines the window HT* code at |point|. Returns HTNOWHERE if |point| is
-  // not within the top |header_height_| of |header_view_|. |point| is in the
-  // coordinates of |header_view_|'s widget. The client view must be hittested
-  // before calling this method because a browser's tabs are in the top
-  // |header_height_| of |header_view_|.
-  int NonClientHitTest(const gfx::Point& point) const;
+  virtual ~HeaderPainter() {
+  }
 
   // Returns the header's minimum width.
-  int GetMinimumHeaderWidth() const;
-
-  // Returns the inset from the right edge.
-  int GetRightInset() const;
-
-  // Returns the amount that the theme background should be inset.
-  int GetThemeBackgroundXInset() const;
+  virtual int GetMinimumHeaderWidth() const = 0;
 
   // Paints the header.
-  // |theme_frame_overlay_id| is 0 if no overlay image should be used.
-  // |mode| indicates whether the window should be painted as active.
-  void PaintHeader(gfx::Canvas* canvas,
-                   Mode mode,
-                   int theme_frame_id,
-                   int theme_frame_overlay_id);
+  virtual void PaintHeader(gfx::Canvas* canvas, Mode mode) = 0;
 
-  // Paints the header/content separator line for non-browser windows.
-  void PaintHeaderContentSeparator(gfx::Canvas* canvas, Mode mode);
+  // Performs layout for the header.
+  virtual void LayoutHeader() = 0;
 
-  // Returns size of the header/content separator line for non-browser windows
-  // in pixels.
-  int HeaderContentSeparatorSize() const;
-
-  // Paint the title bar, primarily the title string.
-  void PaintTitleBar(gfx::Canvas* canvas, const gfx::FontList& title_font_list);
-
-  // Performs layout for the header based on |frame_|'s show state.
-  void LayoutHeader();
-
-  // Sets the height of the header. The height of the header affects painting,
-  // and non client hit tests. It does not affect layout.
-  void set_header_height(int header_height) {
-    header_height_ = header_height;
-  }
-
-  // Returns the header height.
-  int header_height() const {
-    return header_height_;
-  }
+  // Gets / sets how much of the header is painted. This allows the tabstrip to
+  // affect the header height. This height does not affect LayoutHeader().
+  virtual int GetHeaderHeightForPainting() const = 0;
+  virtual void SetHeaderHeightForPainting(int height_for_painting) = 0;
 
   // Schedule a re-paint of the entire title.
-  void SchedulePaintForTitle(const gfx::FontList& title_font_list);
-
-  // Called when the browser theme changes.
-  void OnThemeChanged();
-
-  // Overridden from gfx::AnimationDelegate
-  virtual void AnimationProgressed(const gfx::Animation* animation) OVERRIDE;
-
- private:
-  FRIEND_TEST_ALL_PREFIXES(HeaderPainterTest, TitleIconAlignment);
-
-  // Paints the border around the header.
-  void PaintBorder(gfx::Canvas* canvas, Mode mode);
-
-  // Updates the images used for the minimize, restore and close buttons.
-  void UpdateCaptionButtonImages();
-
-  // Returns the header bounds in the coordinates of |header_view_|. The header
-  // is assumed to be positioned at the top left corner of |header_view_| and to
-  // have the same width as |header_view_|.
-  gfx::Rect GetHeaderLocalBounds() const;
-
-  // Returns the offset between window left edge and title string.
-  int GetTitleOffsetX() const;
-
-  // Returns the vertical center of the caption button container in window
-  // coordinates.
-  int GetCaptionButtonContainerCenterY() const;
-
-  // Returns the radius of the header's top corners.
-  int GetHeaderCornerRadius() const;
-
-  // Get the bounds for the title. The provided |title_font_list| is used to
-  // determine the correct dimensions.
-  gfx::Rect GetTitleBounds(const gfx::FontList& title_font_list);
-
-  Style style_;
-
-  // Not owned
-  views::Widget* frame_;
-  views::View* header_view_;
-  views::View* window_icon_;  // May be NULL.
-  FrameCaptionButtonContainerView* caption_button_container_;
-
-  // The height of the header.
-  int header_height_;
-
-  // Image ids and opacity last used for painting header.
-  int previous_theme_frame_id_;
-  int previous_theme_frame_overlay_id_;
-
-  // Image ids and opacity we are crossfading from.
-  int crossfade_theme_frame_id_;
-  int crossfade_theme_frame_overlay_id_;
-
-  scoped_ptr<gfx::SlideAnimation> crossfade_animation_;
-
-  DISALLOW_COPY_AND_ASSIGN(HeaderPainter);
+  virtual void SchedulePaintForTitle() = 0;
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_HEADER_PAINTER_H_