1 | /* |
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2 | |
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3 | Copyright 2014 S. Razi Alavizadeh |
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4 | Copyright 2013-2014 Adam Reichold |
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5 | |
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6 | This file is part of qpdfview. |
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7 | |
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8 | qpdfview is free software: you can redistribute it and/or modify |
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9 | it under the terms of the GNU General Public License as published by |
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10 | the Free Software Foundation, either version 2 of the License, or |
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11 | (at your option) any later version. |
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12 | |
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13 | qpdfview is distributed in the hope that it will be useful, |
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14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 | GNU General Public License for more details. |
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17 | |
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18 | You should have received a copy of the GNU General Public License |
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19 | along with qpdfview. If not, see <http://www.gnu.org/licenses/>. |
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20 | |
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21 | */ |
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22 | |
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23 | #ifndef DOCUMENTLAYOUT_H |
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24 | #define DOCUMENTLAYOUT_H |
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25 | |
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26 | #include <QMap> |
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27 | #include <QPair> |
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28 | |
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29 | #include "global.h" |
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30 | |
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31 | class QRectF; |
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32 | |
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33 | namespace qpdfview |
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34 | { |
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35 | |
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36 | class Settings; |
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37 | class PageItem; |
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38 | |
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39 | struct DocumentLayout |
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40 | { |
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41 | DocumentLayout(); |
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42 | virtual ~DocumentLayout() {} |
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43 | |
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44 | static DocumentLayout* fromLayoutMode(LayoutMode layoutMode); |
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45 | |
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46 | virtual LayoutMode layoutMode() const = 0; |
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47 | |
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48 | virtual int currentPage(int page) const = 0; |
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49 | virtual int previousPage(int page) const = 0; |
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50 | virtual int nextPage(int page, int count) const = 0; |
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51 | |
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52 | bool isCurrentPage(const QRectF& visibleRect, const QRectF& pageRect) const; |
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53 | |
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54 | virtual QPair< int, int > prefetchRange(int page, int count) const = 0; |
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55 | |
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56 | virtual int leftIndex(int index) const = 0; |
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57 | virtual int rightIndex(int index, int count) const = 0; |
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58 | |
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59 | virtual qreal visibleWidth(int viewportWidth) const = 0; |
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60 | qreal visibleHeight(int viewportHeight) const; |
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61 | |
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62 | virtual void prepareLayout(const QVector< PageItem* >& pageItems, bool rightToLeft, |
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63 | qreal& left, qreal& right, qreal& height) = 0; |
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64 | |
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65 | protected: |
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66 | static Settings* s_settings; |
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67 | |
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68 | }; |
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69 | |
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70 | struct SinglePageLayout : public DocumentLayout |
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71 | { |
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72 | LayoutMode layoutMode() const { return SinglePageMode; } |
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73 | |
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74 | int currentPage(int page) const; |
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75 | int previousPage(int page) const; |
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76 | int nextPage(int page, int count) const; |
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77 | |
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78 | QPair< int, int > prefetchRange(int page, int count) const; |
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79 | |
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80 | int leftIndex(int index) const; |
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81 | int rightIndex(int index, int count) const; |
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82 | |
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83 | qreal visibleWidth(int viewportWidth) const; |
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84 | |
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85 | void prepareLayout(const QVector< PageItem* >& pageItems, bool rightToLeft, |
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86 | qreal& left, qreal& right, qreal& height); |
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87 | |
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88 | }; |
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89 | |
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90 | struct TwoPagesLayout : public DocumentLayout |
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91 | { |
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92 | LayoutMode layoutMode() const { return TwoPagesMode; } |
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93 | |
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94 | int currentPage(int page) const; |
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95 | int previousPage(int page) const; |
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96 | int nextPage(int page, int count) const; |
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97 | |
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98 | QPair< int, int > prefetchRange(int page, int count) const; |
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99 | |
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100 | int leftIndex(int index) const; |
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101 | int rightIndex(int index, int count) const; |
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102 | |
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103 | qreal visibleWidth(int viewportWidth) const; |
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104 | |
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105 | void prepareLayout(const QVector< PageItem* >& pageItems, bool rightToLeft, |
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106 | qreal& left, qreal& right, qreal& height); |
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107 | |
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108 | }; |
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109 | |
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110 | struct TwoPagesWithCoverPageLayout : public TwoPagesLayout |
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111 | { |
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112 | LayoutMode layoutMode() const { return TwoPagesWithCoverPageMode; } |
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113 | |
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114 | int currentPage(int page) const; |
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115 | |
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116 | int leftIndex(int index) const; |
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117 | int rightIndex(int index, int count) const; |
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118 | |
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119 | }; |
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120 | |
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121 | struct MultiplePagesLayout : public DocumentLayout |
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122 | { |
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123 | LayoutMode layoutMode() const { return MultiplePagesMode; } |
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124 | |
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125 | int currentPage(int page) const; |
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126 | int previousPage(int page) const; |
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127 | int nextPage(int page, int count) const; |
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128 | |
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129 | QPair< int, int > prefetchRange(int page, int count) const; |
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130 | |
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131 | int leftIndex(int index) const; |
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132 | int rightIndex(int index, int count) const; |
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133 | |
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134 | qreal visibleWidth(int viewportWidth) const; |
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135 | |
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136 | void prepareLayout(const QVector< PageItem* >& pageItems, bool rightToLeft, |
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137 | qreal& left, qreal& right, qreal& height); |
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138 | |
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139 | }; |
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140 | |
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141 | } // qpdfview |
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142 | |
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143 | #endif // DOCUMENTLAYOUT_H |
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