summaryrefslogtreecommitdiff
path: root/xfa_test/pdf/pdfium/pdfium_page.h
blob: 22ea142988b3697ea3ed30f111e708238c2e0b49 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
// Copyright (c) 2010 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 PDF_PDFIUM_PDFIUM_PAGE_H_
#define PDF_PDFIUM_PDFIUM_PAGE_H_

#include <string>
#include <vector>

#include "base/strings/string16.h"
#include "ppapi/cpp/rect.h"
#include "third_party/pdfium/fpdfsdk/include/fpdfdoc.h"
#include "third_party/pdfium/fpdfsdk/include/fpdfformfill.h"
#include "third_party/pdfium/fpdfsdk/include/fpdftext.h"

namespace base {
class Value;
}

namespace chrome_pdf {

class PDFiumEngine;

// Wrapper around a page from the document.
class PDFiumPage {
 public:
  PDFiumPage(PDFiumEngine* engine,
             int i,
             const pp::Rect& r,
             bool available);
  ~PDFiumPage();
  // Unloads the PDFium data for this page from memory.
  void Unload();
  // Gets the FPDF_PAGE for this page, loading and parsing it if necessary.
  FPDF_PAGE GetPage();
  //Get the FPDF_PAGE for printing.
  FPDF_PAGE GetPrintPage();
  //Close the printing page.
  void ClosePrintPage();

  // Returns FPDF_TEXTPAGE for the page, loading and parsing it if necessary.
  FPDF_TEXTPAGE GetTextPage();

  // Returns a DictionaryValue version of the page.
  base::Value* GetAccessibleContentAsValue(int rotation);

  enum Area {
    NONSELECTABLE_AREA,
    TEXT_AREA,
    WEBLINK_AREA,  // Area is a hyperlink.
    DOCLINK_AREA,  // Area is a link to a different part of the same document.
  };

  struct LinkTarget {
    // We are using std::string here which have a copy contructor.
    // That prevents us from using union here.
    std::string url;  // Valid for WEBLINK_AREA only.
    int page;         // Valid for DOCLINK_AREA only.
  };

  // Given a point in the document that's in this page, returns its character
  // index if it's near a character, and also the type of text.
  // Target is optional. It will be filled in for WEBLINK_AREA or
  // DOCLINK_AREA only.
  Area GetCharIndex(const pp::Point& point, int rotation, int* char_index,
                    LinkTarget* target);

  // Gets the character at the given index.
  base::char16 GetCharAtIndex(int index);

  // Gets the number of characters in the page.
  int GetCharCount();

  // Converts from page coordinates to screen coordinates.
  pp::Rect PageToScreen(const pp::Point& offset,
                        double zoom,
                        double left,
                        double top,
                        double right,
                        double bottom,
                        int rotation);

  int index() const { return index_; }
  pp::Rect rect() const { return rect_; }
  void set_rect(const pp::Rect& r) { rect_ = r; }
  bool available() const { return available_; }
  void set_available(bool available) { available_ = available; }
  void set_calculated_links(bool calculated_links) {
     calculated_links_ = calculated_links;
  }

 private:
  // Returns a link index if the given character index is over a link, or -1
  // otherwise.
  int GetLink(int char_index, LinkTarget* target);
  // Returns the link indices if the given rect intersects a link rect, or an
  // empty vector otherwise.
  std::vector<int> GetLinks(pp::Rect text_area,
                            std::vector<LinkTarget>* targets);
  // Calculate the locations of any links on the page.
  void CalculateLinks();
  // Returns link type and target associated with a link. Returns
  // NONSELECTABLE_AREA if link detection failed.
  Area GetLinkTarget(FPDF_LINK link, LinkTarget* target);
  // Returns target associated with a destination.
  Area GetDestinationTarget(FPDF_DEST destination, LinkTarget* target);
  // Returns the text in the supplied box as a Value Node
  base::Value* GetTextBoxAsValue(double page_height, double left, double top,
                                 double right, double bottom, int rotation);
  // Helper functions for JSON generation
  base::Value* CreateTextNode(std::string text);
  base::Value* CreateURLNode(std::string text, std::string url);

  struct Link {
    Link();
    ~Link();

    std::string url;
    // Bounding rectangles of characters.
    std::vector<pp::Rect> rects;
  };

  PDFiumEngine* engine_;
  FPDF_PAGE page_;
  FPDF_TEXTPAGE text_page_;
  int index_;
  pp::Rect rect_;
  bool calculated_links_;
  std::vector<Link> links_;
  bool available_;
};

}  // namespace chrome_pdf

#endif  // PDF_PDFIUM_PDFIUM_PAGE_H_