1/****************************************************************************
2**
3** Copyright (C) 2019 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the QtGui module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34** https://www.gnu.org/licenses/gpl-3.0.html.
35**
36** $QT_END_LICENSE$
37**
38****************************************************************************/
39
40#ifndef QTEXTMARKDOWNIMPORTER_H
41#define QTEXTMARKDOWNIMPORTER_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists purely as an
48// implementation detail. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include <QtGui/qfont.h>
55#include <QtGui/qtguiglobal.h>
56#include <QtGui/qpalette.h>
57#include <QtGui/qtextdocument.h>
58#include <QtGui/qtextlist.h>
59#include <QtCore/qpointer.h>
60#include <QtCore/qstack.h>
61
62QT_BEGIN_NAMESPACE
63
64class QTextCursor;
65class QTextDocument;
66class QTextTable;
67
68class Q_GUI_EXPORT QTextMarkdownImporter
69{
70public:
71 enum Feature {
72 FeatureCollapseWhitespace = 0x0001,
73 FeaturePermissiveATXHeaders = 0x0002,
74 FeaturePermissiveURLAutoLinks = 0x0004,
75 FeaturePermissiveMailAutoLinks = 0x0008,
76 FeatureNoIndentedCodeBlocks = 0x0010,
77 FeatureNoHTMLBlocks = 0x0020,
78 FeatureNoHTMLSpans = 0x0040,
79 FeatureTables = 0x0100,
80 FeatureStrikeThrough = 0x0200,
81 FeaturePermissiveWWWAutoLinks = 0x0400,
82 FeatureTasklists = 0x0800,
83 // composite flags
84 FeaturePermissiveAutoLinks = FeaturePermissiveMailAutoLinks
85 | FeaturePermissiveURLAutoLinks | FeaturePermissiveWWWAutoLinks,
86 FeatureNoHTML = QTextDocument::MarkdownNoHTML,
87 DialectCommonMark = QTextDocument::MarkdownDialectCommonMark,
88 DialectGitHub = QTextDocument::MarkdownDialectGitHub
89 };
90 Q_DECLARE_FLAGS(Features, Feature)
91
92 QTextMarkdownImporter(Features features);
93 QTextMarkdownImporter(QTextDocument::MarkdownFeatures features);
94
95 void import(QTextDocument *doc, const QString &markdown);
96
97public:
98 // MD4C callbacks
99 int cbEnterBlock(int blockType, void* detail);
100 int cbLeaveBlock(int blockType, void* detail);
101 int cbEnterSpan(int spanType, void* detail);
102 int cbLeaveSpan(int spanType, void* detail);
103 int cbText(int textType, const char* text, unsigned size);
104
105private:
106 void insertBlock();
107
108private:
109 QTextDocument *m_doc = nullptr;
110 QTextCursor *m_cursor = nullptr;
111 QTextTable *m_currentTable = nullptr; // because m_cursor->currentTable() doesn't work
112#if QT_CONFIG(regularexpression)
113 QString m_htmlAccumulator;
114#endif
115 QString m_blockCodeLanguage;
116 QVector<int> m_nonEmptyTableCells; // in the current row
117 QStack<QPointer<QTextList>> m_listStack;
118 QStack<QTextCharFormat> m_spanFormatStack;
119 QFont m_monoFont;
120 QPalette m_palette;
121#if QT_CONFIG(regularexpression)
122 int m_htmlTagDepth = 0;
123#endif
124 int m_blockQuoteDepth = 0;
125 int m_tableColumnCount = 0;
126 int m_tableRowCount = 0;
127 int m_tableCol = -1; // because relative cell movements (e.g. m_cursor->movePosition(QTextCursor::NextCell)) don't work
128 int m_paragraphMargin = 0;
129 int m_blockType = 0;
130 char m_blockCodeFence = 0;
131 Features m_features;
132 QTextImageFormat m_imageFormat;
133 QTextListFormat m_listFormat;
134 QTextBlockFormat::MarkerType m_markerType = QTextBlockFormat::MarkerType::NoMarker;
135 bool m_needsInsertBlock = false;
136 bool m_needsInsertList = false;
137 bool m_listItem = false; // true from the beginning of LI to the end of the first P
138 bool m_codeBlock = false;
139 bool m_imageSpan = false;
140};
141
142Q_DECLARE_OPERATORS_FOR_FLAGS(QTextMarkdownImporter::Features)
143
144QT_END_NAMESPACE
145
146#endif // QTEXTMARKDOWNIMPORTER_H
147

source code of qtbase/src/gui/text/qtextmarkdownimporter_p.h