File indexing completed on 2024-05-12 16:34:59 

0001 /* This file is part of the Calligra project, made within the KDE community.
0002  *
0003  * Copyright (C) 2013,2016 Friedrich W. H. Kossebau <friedrich@kogmbh.com>
0004  *
0005  * This library is free software; you can redistribute it and/or
0006  * modify it under the terms of the GNU Library General Public
0007  * License as published by the Free Software Foundation; either
0008  * version 2 of the License, or (at your option) any later version.
0009  *
0010  * This library is distributed in the hope that it will be useful,
0011  * but WITHOUT ANY WARRANTY; without even the implied warranty of
0012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
0013  * Library General Public License for more details.
0014  *
0015  * You should have received a copy of the GNU Library General Public License
0016  * along with this library; see the file COPYING.LIB.  If not, write to
0017  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
0018  * Boston, MA 02110-1301, USA.
0019  */
0020 
0021 #ifndef TEXTDOCUMENTSTRUCTUREMODEL_H
0022 #define TEXTDOCUMENTSTRUCTUREMODEL_H
0023 
0024 #include <QAbstractItemModel>
0025 #include <QVector>
0026 #include <QHash>
0027 #include <QPointer>
0028 
0029 class QTextDocument;
0030 class QTextFrame;
0031 class QTextBlock;
0032 class QTextLine;
0033 
0034 struct NodeData
0035 {
0036     enum Type {Frame, Block, Line};
0037 
0038     Type type;
0039     union {
0040         QTextFrame *frame;
0041         int blockNumber;
0042     };
0043     int lineNumber;
0044 
0045     static NodeData fromFrame(QTextFrame *frame);
0046     static NodeData fromBlock(int blockNumber);
0047     static NodeData fromLine(int blockNumber, int lineNumber);
0048 };
0049 Q_DECLARE_TYPEINFO(NodeData, Q_MOVABLE_TYPE);
0050 
0051 struct BlockData
0052 {
0053     explicit BlockData(int _nodeIndex) : nodeIndex(_nodeIndex) {}
0054 
0055     int nodeIndex;
0056     QHash<int, int> lineNumberTable;
0057 };
0058 Q_DECLARE_TYPEINFO(BlockData, Q_MOVABLE_TYPE);
0059 
0060 
0061 class TextDocumentStructureModel : public QAbstractItemModel
0062 {
0063     Q_OBJECT
0064 
0065     enum Columns {
0066         nameColumn = 0,
0067         endColumn
0068     };
0069 
0070 public:
0071     explicit TextDocumentStructureModel(QObject *parent = 0);
0072     ~TextDocumentStructureModel() override;
0073 
0074 public: // QAbstractItemModel API
0075     QModelIndex index(int row, int column, const QModelIndex &parentIndex) const override;
0076     QModelIndex parent(const QModelIndex &index) const override;
0077     int rowCount(const QModelIndex &index) const override;
0078     int columnCount(const QModelIndex &index) const override;
0079     QVariant data(const QModelIndex &index, int role) const override;
0080     bool hasChildren(const QModelIndex &parent) const override;
0081 
0082 public:
0083     void setTextDocument(QTextDocument *textDocument);
0084 
0085 private Q_SLOTS:
0086     void onContentsChanged();
0087     void onModelReset();
0088 
0089 private:
0090     int lineIndex(const QTextBlock &block, const QTextLine &line) const;
0091     int blockIndex(const QTextBlock &block) const;
0092     int frameIndex(QTextFrame *frame) const;
0093 
0094 private:
0095     QPointer<QTextDocument> m_textDocument;
0096 
0097     mutable QVector<NodeData> m_nodeDataTable;
0098 
0099     mutable QHash<int, BlockData> m_blockNumberTable;
0100     mutable QHash<QTextFrame*, int> m_frameTable;
0101 };
0102 
0103 #endif // TEXTDOCUMENTSTRUCTUREMODEL_H