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
14namespace 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.
22class 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_
70