1// Copyright (C) 2016 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#ifndef QSVGHANDLER_P_H
5#define QSVGHANDLER_P_H
6
7//
8// W A R N I N G
9// -------------
10//
11// This file is not part of the Qt API. It exists purely as an
12// implementation detail. This header file may change from version to
13// version without notice, or even be removed.
14//
15// We mean it.
16//
17
18#include "QtCore/qxmlstream.h"
19#include "QtCore/qhash.h"
20#include "QtCore/qstack.h"
21#include <QtCore/QLoggingCategory>
22#include "qsvgstyle_p.h"
23#if QT_CONFIG(cssparser)
24#include "private/qcssparser_p.h"
25#endif
26#include "qsvggraphics_p.h"
27#include "qtsvgglobal_p.h"
28
29QT_BEGIN_NAMESPACE
30
31class QSvgNode;
32class QSvgTinyDocument;
33class QSvgHandler;
34class QColor;
35class QSvgStyleSelector;
36
37#ifndef QT_NO_CSSPARSER
38
39struct QSvgCssAttribute
40{
41 QString name;
42 QString value;
43};
44
45#endif
46
47class Q_SVG_EXPORT QSvgHandler
48{
49public:
50 enum LengthType {
51 LT_PERCENT,
52 LT_PX,
53 LT_PC,
54 LT_PT,
55 LT_MM,
56 LT_CM,
57 LT_IN,
58 LT_OTHER
59 };
60
61public:
62 QSvgHandler(QIODevice *device, QtSvg::Options options = {});
63 QSvgHandler(const QByteArray &data, QtSvg::Options options = {});
64 QSvgHandler(QXmlStreamReader *const data, QtSvg::Options options = {});
65 ~QSvgHandler();
66
67 QIODevice *device() const;
68 QSvgTinyDocument *document() const;
69
70 inline bool ok() const {
71 return document() != 0 && !xml->hasError();
72 }
73
74 inline QString errorString() const { return xml->errorString(); }
75 inline int lineNumber() const { return xml->lineNumber(); }
76
77 void setDefaultCoordinateSystem(LengthType type);
78 LengthType defaultCoordinateSystem() const;
79
80 void pushColor(const QColor &color);
81 void pushColorCopy();
82 void popColor();
83 QColor currentColor() const;
84
85#ifndef QT_NO_CSSPARSER
86 void setInStyle(bool b);
87 bool inStyle() const;
88
89 QSvgStyleSelector *selector() const;
90#endif
91
92 void setAnimPeriod(int start, int end);
93 int animationDuration() const;
94
95#ifndef QT_NO_CSSPARSER
96 void parseCSStoXMLAttrs(const QString &css, QList<QSvgCssAttribute> *attributes);
97#endif
98
99 inline QPen defaultPen() const
100 { return m_defaultPen; }
101
102 QtSvg::Options options() const;
103 bool trustedSourceMode() const;
104
105public:
106 bool startElement(const QString &localName, const QXmlStreamAttributes &attributes);
107 bool endElement(QStringView localName);
108 bool characters(QStringView str);
109 bool processingInstruction(const QString &target, const QString &data);
110
111private:
112 void init();
113
114 QSvgTinyDocument *m_doc;
115 QStack<QSvgNode *> m_nodes;
116 // TODO: This is only needed during parsing, so it unnecessarily takes up space after that.
117 // Temporary container for :
118 // - <use> nodes which haven't been resolved yet.
119 // - <filter> nodes to be checked for unsupported filter primitives.
120 QList<QSvgNode *> m_toBeResolved;
121
122 enum CurrentNode
123 {
124 Unknown,
125 Graphics,
126 Style,
127 Doc
128 };
129 QStack<CurrentNode> m_skipNodes;
130
131 /*!
132 Follows the depths of elements. The top is current xml:space
133 value that applies for a given element.
134 */
135 QStack<QSvgText::WhitespaceMode> m_whitespaceMode;
136
137 QSvgRefCounter<QSvgStyleProperty> m_style;
138
139 LengthType m_defaultCoords;
140
141 QStack<QColor> m_colorStack;
142 QStack<int> m_colorTagCount;
143
144 int m_animEnd;
145
146 QXmlStreamReader *const xml;
147#ifndef QT_NO_CSSPARSER
148 bool m_inStyle;
149 QSvgStyleSelector *m_selector;
150 QCss::Parser m_cssParser;
151#endif
152 void parse();
153 void resolvePaintServers(QSvgNode *node, int nestedDepth = 0);
154 void resolveNodes();
155
156 QPen m_defaultPen;
157 /**
158 * Whether we own the variable xml, and hence whether
159 * we need to delete it.
160 */
161 const bool m_ownsReader;
162
163 const QtSvg::Options m_options;
164};
165
166Q_DECLARE_LOGGING_CATEGORY(lcSvgHandler)
167
168QT_END_NAMESPACE
169
170#endif // QSVGHANDLER_P_H
171

source code of qtsvg/src/svg/qsvghandler_p.h