printing/printed_page.h

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef PRINTING_PRINTED_PAGE_H_
   6 #define PRINTING_PRINTED_PAGE_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "printing/metafile.h"
  11 #include "ui/gfx/rect.h"
  12 #include "ui/gfx/size.h"
  13
  14 namespace printing {
  15
  16 // Contains the data to reproduce a printed page, either on screen or on
  17 // paper. Once created, this object is immutable. It has no reference to the
  18 // PrintedDocument containing this page.
  19 // Note: May be accessed from many threads at the same time. This is an non
  20 // issue since this object is immutable. The reason is that a page may be
  21 // printed and be displayed at the same time.
  22 class PRINTING_EXPORT PrintedPage
  23     : public base::RefCountedThreadSafe<PrintedPage> {
  24  public:
  25   PrintedPage(int page_number,
  26               Metafile* metafile,
  27               const gfx::Size& page_size,
  28               const gfx::Rect& page_content_rect,
  29               double shrink_factor);
  30
  31   // Getters
  32   int page_number() const { return page_number_; }
  33   const Metafile* metafile() const;
  34   const gfx::Size& page_size() const { return page_size_; }
  35   const gfx::Rect& page_content_rect() const { return page_content_rect_; }
  36   double shrink_factor() const { return shrink_factor_; }
  37
  38   // Get page content rect adjusted based on
  39   // http://dev.w3.org/csswg/css3-page/#positioning-page-box
  40   void GetCenteredPageContentRect(const gfx::Size& paper_size,
  41                                   gfx::Rect* content_rect) const;
  42
  43  private:
  44   friend class base::RefCountedThreadSafe<PrintedPage>;
  45
  46   ~PrintedPage();
  47
  48   // Page number inside the printed document.
  49   const int page_number_;
  50
  51   // Actual paint data.
  52   const scoped_ptr<Metafile> metafile_;
  53
  54   // The physical page size. To support multiple page formats inside on print
  55   // job.
  56   const gfx::Size page_size_;
  57
  58   // The printable area of the page.
  59   const gfx::Rect page_content_rect_;
  60
  61   // Shrink done in comparison to desired_dpi.
  62   double shrink_factor_;
  63
  64   DISALLOW_COPY_AND_ASSIGN(PrintedPage);
  65 };
  66
  67 }  // namespace printing
  68
  69 #endif  // PRINTING_PRINTED_PAGE_H_