[1f4adec] | 1 | /* |
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| 2 | |
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| 3 | Copyright 2014 S. Razi Alavizadeh |
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| 4 | Copyright 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 SEARCHMODEL_H |
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| 24 | #define SEARCHMODEL_H |
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| 25 | |
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| 26 | #include <QAbstractItemModel> |
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| 27 | #include <QCache> |
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| 28 | #include <QFutureWatcher> |
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| 29 | #include <QRectF> |
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| 30 | |
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| 31 | namespace qpdfview |
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| 32 | { |
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| 33 | |
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| 34 | class DocumentView; |
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| 35 | |
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| 36 | class SearchModel : public QAbstractItemModel |
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| 37 | { |
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| 38 | Q_OBJECT |
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| 39 | |
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| 40 | public: |
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| 41 | static SearchModel* instance(); |
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| 42 | ~SearchModel(); |
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| 43 | |
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| 44 | |
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| 45 | QModelIndex index(int row, int column, const QModelIndex& parent = QModelIndex()) const; |
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| 46 | |
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| 47 | QModelIndex parent(const QModelIndex& child) const; |
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| 48 | |
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| 49 | int rowCount(const QModelIndex& parent = QModelIndex()) const; |
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| 50 | int columnCount(const QModelIndex& parent = QModelIndex()) const; |
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| 51 | |
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| 52 | enum |
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| 53 | { |
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| 54 | CountRole = Qt::UserRole + 1, |
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| 55 | ProgressRole, |
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| 56 | PageRole, |
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| 57 | RectRole, |
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| 58 | TextRole, |
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| 59 | MatchCaseRole, |
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| 60 | WholeWordsRole, |
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| 61 | MatchedTextRole, |
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| 62 | SurroundingTextRole |
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| 63 | }; |
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| 64 | |
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| 65 | QVariant data(const QModelIndex& index, int role = Qt::DisplayRole) const; |
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| 66 | |
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| 67 | |
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| 68 | DocumentView* viewForIndex(const QModelIndex& index) const; |
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| 69 | |
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| 70 | |
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| 71 | bool hasResults(DocumentView* view) const; |
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| 72 | bool hasResultsOnPage(DocumentView* view, int page) const; |
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| 73 | int numberOfResultsOnPage(DocumentView* view, int page) const; |
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| 74 | QList< QRectF > resultsOnPage(DocumentView* view, int page) const; |
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| 75 | |
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| 76 | enum FindDirection |
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| 77 | { |
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| 78 | FindNext, |
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| 79 | FindPrevious |
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| 80 | }; |
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| 81 | |
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| 82 | QPersistentModelIndex findResult(DocumentView* view, const QPersistentModelIndex& currentResult, int currentPage, FindDirection direction) const; |
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| 83 | |
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| 84 | void insertResults(DocumentView* view, int page, const QList< QRectF >& resultsOnPage); |
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| 85 | void clearResults(DocumentView* view); |
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| 86 | |
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| 87 | void updateProgress(DocumentView* view); |
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| 88 | |
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| 89 | protected slots: |
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| 90 | void on_fetchSurroundingText_finished(); |
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| 91 | |
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| 92 | private: |
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| 93 | Q_DISABLE_COPY(SearchModel) |
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| 94 | |
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| 95 | static SearchModel* s_instance; |
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| 96 | SearchModel(QObject* parent = 0); |
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| 97 | |
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| 98 | QList< DocumentView* > m_views; |
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| 99 | |
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| 100 | QModelIndex findView(DocumentView* view) const; |
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| 101 | QModelIndex findOrInsertView(DocumentView* view); |
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| 102 | |
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| 103 | |
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| 104 | typedef QPair< int, QRectF > Result; |
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| 105 | typedef QList< Result > Results; |
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| 106 | |
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| 107 | QHash< DocumentView*, Results* > m_results; |
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| 108 | |
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| 109 | |
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| 110 | typedef QPair< DocumentView*, QByteArray > TextCacheKey; |
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| 111 | typedef QPair< QString, QString > TextCacheObject; |
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| 112 | |
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| 113 | struct TextJob |
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| 114 | { |
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| 115 | TextCacheKey key; |
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| 116 | TextCacheObject* object; |
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| 117 | |
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| 118 | TextJob() : key(), object(0) {} |
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| 119 | TextJob(const TextCacheKey& key, TextCacheObject* object) : key(key), object(object) {} |
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| 120 | |
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| 121 | }; |
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| 122 | |
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| 123 | typedef QFutureWatcher< TextJob > TextWatcher; |
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| 124 | |
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| 125 | mutable QCache< TextCacheKey, TextCacheObject > m_textCache; |
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| 126 | mutable QHash< TextCacheKey, TextWatcher* > m_textWatchers; |
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| 127 | |
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| 128 | QString fetchMatchedText(DocumentView* view, const Result& result) const; |
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| 129 | QString fetchSurroundingText(DocumentView* view, const Result& result) const; |
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| 130 | |
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| 131 | const TextCacheObject* fetchText(DocumentView* view, const Result& result) const; |
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| 132 | |
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| 133 | static TextCacheKey textCacheKey(DocumentView* view, const Result& result); |
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| 134 | static TextJob textJob(const TextCacheKey& key, const Result& result); |
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| 135 | |
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| 136 | }; |
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| 137 | |
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| 138 | } // qpdfview |
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| 139 | |
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| 140 | #endif // SEARCHMODEL_H |
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