[1f4adec] | 1 | /* |
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| 2 | |
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| 3 | Copyright 2012-2015 Adam Reichold |
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| 4 | |
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| 5 | This file is part of qpdfview. |
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| 6 | |
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| 7 | qpdfview is free software: you can redistribute it and/or modify |
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| 8 | it under the terms of the GNU General Public License as published by |
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| 9 | the Free Software Foundation, either version 2 of the License, or |
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| 10 | (at your option) any later version. |
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| 11 | |
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| 12 | qpdfview is distributed in the hope that it will be useful, |
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| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 15 | GNU General Public License for more details. |
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| 16 | |
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| 17 | You should have received a copy of the GNU General Public License |
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| 18 | along with qpdfview. If not, see <http://www.gnu.org/licenses/>. |
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| 19 | |
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| 20 | */ |
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| 21 | |
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| 22 | #ifndef SEARCHTASK_H |
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| 23 | #define SEARCHTASK_H |
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| 24 | |
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| 25 | #include <QRectF> |
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| 26 | #include <QThread> |
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| 27 | #include <QVector> |
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| 28 | |
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| 29 | namespace qpdfview |
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| 30 | { |
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| 31 | |
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| 32 | namespace Model |
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| 33 | { |
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| 34 | class Page; |
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| 35 | } |
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| 36 | |
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| 37 | class SearchTask : public QThread |
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| 38 | { |
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| 39 | Q_OBJECT |
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| 40 | |
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| 41 | public: |
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| 42 | explicit SearchTask(QObject* parent = 0); |
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| 43 | |
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| 44 | bool wasCanceled() const { return loadCancellation() != NotCanceled; } |
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| 45 | int progress() const { return acquireProgress(); } |
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| 46 | |
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| 47 | const QString& text() const { return m_text; } |
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| 48 | bool matchCase() const { return m_matchCase; } |
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| 49 | bool wholeWords() const { return m_wholeWords; } |
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| 50 | |
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| 51 | void run(); |
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| 52 | |
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| 53 | signals: |
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| 54 | void progressChanged(int progress); |
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| 55 | |
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| 56 | void resultsReady(int index, const QList< QRectF >& results); |
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| 57 | |
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| 58 | public slots: |
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| 59 | void start(const QVector< Model::Page* >& pages, |
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| 60 | const QString& text, bool matchCase, bool wholeWords, int beginAtPage = 1); |
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| 61 | |
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| 62 | void cancel() { setCancellation(); } |
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| 63 | |
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| 64 | private: |
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| 65 | Q_DISABLE_COPY(SearchTask) |
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| 66 | |
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| 67 | QAtomicInt m_wasCanceled; |
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| 68 | mutable QAtomicInt m_progress; |
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| 69 | |
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| 70 | enum |
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| 71 | { |
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| 72 | NotCanceled = 0, |
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| 73 | Canceled = 1 |
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| 74 | }; |
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| 75 | |
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| 76 | void setCancellation(); |
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| 77 | void resetCancellation(); |
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| 78 | bool testCancellation(); |
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| 79 | int loadCancellation() const; |
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| 80 | |
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| 81 | void releaseProgress(int value); |
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| 82 | int acquireProgress() const; |
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| 83 | int loadProgress() const; |
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| 84 | |
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| 85 | |
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| 86 | QVector< Model::Page* > m_pages; |
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| 87 | |
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| 88 | QString m_text; |
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| 89 | bool m_matchCase; |
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| 90 | bool m_wholeWords; |
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| 91 | int m_beginAtPage; |
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| 92 | |
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| 93 | }; |
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| 94 | |
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| 95 | #if QT_VERSION > QT_VERSION_CHECK(5,0,0) |
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| 96 | |
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| 97 | inline void SearchTask::setCancellation() |
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| 98 | { |
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| 99 | m_wasCanceled.storeRelease(Canceled); |
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| 100 | } |
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| 101 | |
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| 102 | inline void SearchTask::resetCancellation() |
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| 103 | { |
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| 104 | m_wasCanceled.storeRelease(NotCanceled); |
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| 105 | } |
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| 106 | |
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| 107 | inline bool SearchTask::testCancellation() |
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| 108 | { |
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| 109 | return m_wasCanceled.load() != NotCanceled; |
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| 110 | } |
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| 111 | |
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| 112 | inline int SearchTask::loadCancellation() const |
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| 113 | { |
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| 114 | return m_wasCanceled.load(); |
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| 115 | } |
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| 116 | |
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| 117 | inline void SearchTask::releaseProgress(int value) |
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| 118 | { |
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| 119 | m_progress.storeRelease(value); |
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| 120 | } |
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| 121 | |
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| 122 | inline int SearchTask::acquireProgress() const |
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| 123 | { |
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| 124 | return m_progress.loadAcquire(); |
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| 125 | } |
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| 126 | |
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| 127 | inline int SearchTask::loadProgress() const |
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| 128 | { |
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| 129 | return m_progress.load(); |
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| 130 | } |
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| 131 | |
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| 132 | #else |
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| 133 | |
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| 134 | inline void SearchTask::setCancellation() |
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| 135 | { |
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| 136 | m_wasCanceled.fetchAndStoreRelease(Canceled); |
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| 137 | } |
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| 138 | |
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| 139 | inline void SearchTask::resetCancellation() |
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| 140 | { |
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| 141 | m_wasCanceled.fetchAndStoreRelease(NotCanceled); |
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| 142 | } |
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| 143 | |
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| 144 | inline bool SearchTask::testCancellation() |
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| 145 | { |
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| 146 | return !m_wasCanceled.testAndSetRelaxed(NotCanceled, NotCanceled); |
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| 147 | } |
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| 148 | |
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| 149 | inline int SearchTask::loadCancellation() const |
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| 150 | { |
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| 151 | return m_wasCanceled; |
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| 152 | } |
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| 153 | |
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| 154 | inline void SearchTask::releaseProgress(int value) |
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| 155 | { |
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| 156 | m_progress.fetchAndStoreRelease(value); |
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| 157 | } |
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| 158 | |
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| 159 | inline int SearchTask::acquireProgress() const |
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| 160 | { |
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| 161 | return m_progress.fetchAndAddAcquire(0); |
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| 162 | } |
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| 163 | |
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| 164 | inline int SearchTask::loadProgress() const |
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| 165 | { |
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| 166 | return m_progress; |
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| 167 | } |
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| 168 | |
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| 169 | #endif // QT_VERSION |
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| 170 | |
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| 171 | } // qpdfview |
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| 172 | |
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| 173 | #endif // SEARCHTHREAD_H |
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