src/svg/qsvghandler_p.h

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  41
  42 #ifndef QSVGHANDLER_P_H
  43 #define QSVGHANDLER_P_H
  44
  45 //
  46 //  W A R N I N G
  47 //  -------------
  48 //
  49 // This file is not part of the Qt API.  It exists purely as an
  50 // implementation detail.  This header file may change from version to
  51 // version without notice, or even be removed.
  52 //
  53 // We mean it.
  54 //
  55
  56 #include "QtXml/qxmlstream.h"
  57
  58 #ifndef QT_NO_SVG
  59
  60 #include "QtCore/qhash.h"
  61 #include "QtCore/qstack.h"
  62 #include "qsvgstyle_p.h"
  63 #include "private/qcssparser_p.h"
  64 #include "private/qsvggraphics_p.h"
  65
  66 QT_BEGIN_NAMESPACE
  67
  68 class QSvgNode;
  69 class QSvgTinyDocument;
  70 class QSvgHandler;
  71 class QColor;
  72 class QSvgStyleSelector;
  73 class QXmlStreamReader;
  74
  75 struct QSvgCssAttribute
  76 {
  77     QXmlStreamStringRef name;
  78     QXmlStreamStringRef value;
  79 };
  80
  81 class QSvgHandler
  82 {
  83 public:
  84     enum LengthType {
  85         LT_PERCENT,
  86         LT_PX,
  87         LT_PC,
  88         LT_PT,
  89         LT_MM,
  90         LT_CM,
  91         LT_IN,
  92         LT_OTHER
  93     };
  94
  95 public:
  96     QSvgHandler(QIODevice *device);
  97     QSvgHandler(const QByteArray &data);
  98     QSvgHandler(QXmlStreamReader *const data);
  99     ~QSvgHandler();
 100
 101     QSvgTinyDocument *document() const;
 102
 103     inline bool ok() const {
 104         return document() != 0 && !xml->hasError();
 105     }
 106
 107     inline QString errorString() const { return xml->errorString(); }
 108     inline int lineNumber() const { return xml->lineNumber(); }
 109
 110     void setDefaultCoordinateSystem(LengthType type);
 111     LengthType defaultCoordinateSystem() const;
 112
 113     void pushColor(const QColor &color);
 114     void pushColorCopy();
 115     void popColor();
 116     QColor currentColor() const;
 117
 118     void setInStyle(bool b);
 119     bool inStyle() const;
 120
 121     QSvgStyleSelector *selector() const;
 122
 123     void setAnimPeriod(int start, int end);
 124     int animationDuration() const;
 125
 126     void parseCSStoXMLAttrs(QString css, QVector<QSvgCssAttribute> *attributes);
 127
 128     inline QPen defaultPen() const
 129     { return m_defaultPen; }
 130
 131 public:
 132     bool startElement(const QString &localName, const QXmlStreamAttributes &attributes);
 133     bool endElement(const QStringRef &localName);
 134     bool characters(const QStringRef &str);
 135     bool processingInstruction(const QString &target, const QString &data);
 136
 137 private:
 138     void init();
 139
 140     QSvgTinyDocument *m_doc;
 141     QStack<QSvgNode*> m_nodes;
 142
 143     QList<QSvgNode*>  m_resolveNodes;
 144
 145     enum CurrentNode
 146     {
 147         Unknown,
 148         Graphics,
 149         Style
 150     };
 151     QStack<CurrentNode> m_skipNodes;
 152
 153     /*!
 154         Follows the depths of elements. The top is current xml:space
 155         value that applies for a given element.
 156      */
 157     QStack<QSvgText::WhitespaceMode> m_whitespaceMode;
 158
 159     QSvgRefCounter<QSvgStyleProperty> m_style;
 160
 161     LengthType m_defaultCoords;
 162
 163     QStack<QColor> m_colorStack;
 164     QStack<int>    m_colorTagCount;
 165
 166     bool m_inStyle;
 167
 168     QSvgStyleSelector *m_selector;
 169
 170     int m_animEnd;
 171
 172     QXmlStreamReader *const xml;
 173     QCss::Parser m_cssParser;
 174     void parse();
 175     void resolveGradients(QSvgNode *node);
 176
 177     QPen m_defaultPen;
 178     /**
 179      * Whether we own the variable xml, and hence whether
 180      * we need to delete it.
 181      */
 182     const bool m_ownsReader;
 183 };
 184
 185 QT_END_NAMESPACE
 186
 187 #endif // QT_NO_SVG
 188 #endif // QSVGHANDLER_P_H