Gtk3: Render a GtkHeaderBar as the background of the tab strip

ui/views/window/custom_frame_view.cc

 // 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.
 
 #include "ui/views/window/custom_frame_view.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/strings/utf_string_conversions.h"
@@ skipping 203 matching lines @@
   SchedulePaint();
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // CustomFrameView, View overrides:
 
 void CustomFrameView::OnPaint(gfx::Canvas* canvas) {
   if (!ShouldShowTitleBarAndBorder())
     return;
 
+  frame_background_->set_frame_color(GetFrameColor());
+  frame_background_->set_use_custom_frame(true);
+  frame_background_->set_is_active(ShouldPaintAsActive());
+  frame_background_->set_incognito(false);
+  const gfx::ImageSkia frame_image = GetFrameImage();
+  frame_background_->set_theme_image(frame_image);
+  frame_background_->set_top_area_height(frame_image.height());
+
   if (frame_->IsMaximized())
     PaintMaximizedFrameBorder(canvas);
   else
     PaintRestoredFrameBorder(canvas);
   PaintTitleBar(canvas);
   if (ShouldShowClientEdge())
     PaintRestoredClientEdge(canvas);
 }
 
 void CustomFrameView::Layout() {
@@ skipping 118 matching lines @@
   }
 
   return true;
 }
 
 bool CustomFrameView::ShouldShowClientEdge() const {
   return !frame_->IsMaximized() && ShouldShowTitleBarAndBorder();
 }
 
 void CustomFrameView::PaintRestoredFrameBorder(gfx::Canvas* canvas) {
-  frame_background_->set_frame_color(GetFrameColor());
-  const gfx::ImageSkia frame_image = GetFrameImage();
-  frame_background_->set_theme_image(frame_image);
-  frame_background_->set_top_area_height(frame_image.height());
-
   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
 
   frame_background_->SetCornerImages(
       rb.GetImageNamed(IDR_WINDOW_TOP_LEFT_CORNER).ToImageSkia(),
       rb.GetImageNamed(IDR_WINDOW_TOP_RIGHT_CORNER).ToImageSkia(),
       rb.GetImageNamed(IDR_WINDOW_BOTTOM_LEFT_CORNER).ToImageSkia(),
       rb.GetImageNamed(IDR_WINDOW_BOTTOM_RIGHT_CORNER).ToImageSkia());
   frame_background_->SetSideImages(
       rb.GetImageNamed(IDR_WINDOW_LEFT_SIDE).ToImageSkia(),
       rb.GetImageNamed(IDR_WINDOW_TOP_CENTER).ToImageSkia(),
       rb.GetImageNamed(IDR_WINDOW_RIGHT_SIDE).ToImageSkia(),
       rb.GetImageNamed(IDR_WINDOW_BOTTOM_CENTER).ToImageSkia());
 
   frame_background_->PaintRestored(canvas, this);
 }
 
 void CustomFrameView::PaintMaximizedFrameBorder(gfx::Canvas* canvas) {
-  const gfx::ImageSkia frame_image = GetFrameImage();
-  frame_background_->set_theme_image(frame_image);
-  frame_background_->set_top_area_height(frame_image.height());
   frame_background_->PaintMaximized(canvas, this);
 
   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
 
   // TODO(jamescook): Migrate this into FrameBackground.
   // The bottom of the titlebar actually comes from the top of the Client Edge
   // graphic, with the actual client edge clipped off the bottom.
   const gfx::ImageSkia* titlebar_bottom = rb.GetImageNamed(
       IDR_APP_TOP_CENTER).ToImageSkia();
   int edge_height = titlebar_bottom->height() -
@@ skipping 241 matching lines @@
     }
     case views::FRAME_BUTTON_CLOSE: {
       button = close_button_;
       break;
     }
   }
   return button;
 }
 
 }  // namespace views