PrintPreview: [LINUX] Update the margin values after flipping the paper orientation.

printing/page_setup.h

 // Copyright (c) 2011 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 PRINTING_PAGE_SETUP_H_
 #define PRINTING_PAGE_SETUP_H_
 
 #include "printing/printing_export.h"
 #include "ui/gfx/rect.h"
 
 namespace printing {
 
 // Margins for a page setup.
 class PRINTING_EXPORT PageMargins {
  public:
   PageMargins();
 
+  // Rotates the margin values in anti-clockwise direction.
+  void Rotate();
+
   void Clear();
 
   // Equality operator.
   bool Equals(const PageMargins& rhs) const;
 
   // Vertical space for the overlay from the top of the sheet.
   int header;
   // Vertical space for the overlay from the bottom of the sheet.
   int footer;
   // Margin on each side of the sheet.
@@ skipping 29 matching lines @@
 
   const gfx::Size& physical_size() const { return physical_size_; }
   const gfx::Rect& overlay_area() const { return overlay_area_; }
   const gfx::Rect& content_area() const { return content_area_; }
   const gfx::Rect& printable_area() const { return printable_area_; }
   const PageMargins& effective_margins() const {
     return effective_margins_;
   }
 
  private:
+  // Store |requested_margins_| and update page setup values.
+  void SetRequestedMarginsAndCalculateSizes(
+      const PageMargins& requested_margins);
+
   // Calculate overlay_area_, effective_margins_, and content_area_, based on
   // a constraint of |bounds| and |text_height|.
   void CalculateSizesWithinRect(const gfx::Rect& bounds, int text_height);
 
   // Physical size of the page, including non-printable margins.
   gfx::Size physical_size_;
 
   // The printable area as specified by the printer driver. We can't get
   // larger than this.
   gfx::Rect printable_area_;
 
   // The printable area for headers and footers.
   gfx::Rect overlay_area_;
 
   // The printable area as selected by the user's margins.
   gfx::Rect content_area_;
 
   // Effective margins.
   PageMargins effective_margins_;
 
   // Requested margins.
   PageMargins requested_margins_;
 
+  // True when |effective_margins_| respects |printable_area_| else false.
+  bool forced_margins_;
+
   // Space that must be kept free for the overlays.
   int text_height_;
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PAGE_SETUP_H_