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39 
40 #ifndef QSTYLESHEETSTYLE_P_H
41 #define QSTYLESHEETSTYLE_P_H
42 
43 #include <QtWidgets/private/qtwidgetsglobal_p.h>
44 #include "private/qwindowsstyle_p.h"
45 
46 #ifndef QT_NO_STYLE_STYLESHEET
47 
48 #include "QtWidgets/qstyleoption.h"
49 #include "QtCore/qhash.h"
50 #include "QtGui/qevent.h"
51 #include "QtCore/qvector.h"
52 #include "QtCore/qset.h"
53 #include "QtWidgets/qapplication.h"
54 #include "private/qcssparser_p.h"
55 #include "QtGui/qbrush.h"
56 
57 QT_BEGIN_NAMESPACE
58 
59 //
60 //  W A R N I N G
61 //  -------------
62 //
63 // This file is not part of the Qt API.  It exists purely as an
64 // implementation detail.  This header file may change from version to
65 // version without notice, or even be removed.
66 //
67 // We mean it.
68 //
69 
70 class QRenderRule;
71 class QAbstractScrollArea;
72 class QStyleSheetStylePrivate;
73 class QStyleOptionTitleBar;
74 
75 class Q_AUTOTEST_EXPORT QStyleSheetStyle : public QWindowsStyle
76 {
77     typedef QWindowsStyle ParentStyle;
78 
79     Q_OBJECT
80 public:
81     QStyleSheetStyle(QStyle *baseStyle);
82     ~QStyleSheetStyle();
83 
84     void drawComplexControl(ComplexControl cc, const QStyleOptionComplex *opt, QPainter *p,
85                             const QWidget *w = nullptr) const override;
86     void drawControl(ControlElement element, const QStyleOption *opt, QPainter *p,
87                      const QWidget *w = nullptr) const override;
88     void drawItemPixmap(QPainter *painter, const QRect &rect, int alignment, const QPixmap &pixmap) const override;
89     void drawItemText(QPainter *painter, const QRect& rect, int alignment, const QPalette &pal,
90               bool enabled, const QString& text, QPalette::ColorRole textRole  = QPalette::NoRole) const override;
91     void drawPrimitive(PrimitiveElement pe, const QStyleOption *opt, QPainter *p,
92                        const QWidget *w = nullptr) const override;
93     QPixmap generatedIconPixmap(QIcon::Mode iconMode, const QPixmap &pixmap,
94                                 const QStyleOption *option) const override;
95     SubControl hitTestComplexControl(ComplexControl cc, const QStyleOptionComplex *opt,
96                                      const QPoint &pt, const QWidget *w = nullptr) const override;
97     QRect itemPixmapRect(const QRect &rect, int alignment, const QPixmap &pixmap) const override;
98     QRect itemTextRect(const QFontMetrics &metrics, const QRect &rect, int alignment, bool enabled,
99                        const QString &text) const override;
100     int pixelMetric(PixelMetric metric, const QStyleOption *option = nullptr, const QWidget *widget = nullptr) const override;
101     void polish(QWidget *widget) override;
102     void polish(QApplication *app) override;
103     void polish(QPalette &pal) override;
104     QSize sizeFromContents(ContentsType ct, const QStyleOption *opt,
105                            const QSize &contentsSize, const QWidget *widget = nullptr) const override;
106     QPalette standardPalette() const override;
107     QIcon standardIcon(StandardPixmap standardIcon, const QStyleOption *opt = nullptr,
108                        const QWidget *widget = nullptr) const override;
109     QPixmap standardPixmap(StandardPixmap standardPixmap, const QStyleOption *option = nullptr,
110                            const QWidget *w = nullptr ) const override;
111     int layoutSpacing(QSizePolicy::ControlType control1, QSizePolicy::ControlType control2,
112                           Qt::Orientation orientation, const QStyleOption *option = nullptr,
113                           const QWidget *widget = nullptr) const override;
114     int styleHint(StyleHint sh, const QStyleOption *opt = nullptr, const QWidget *w = nullptr,
115                   QStyleHintReturn *shret = nullptr) const override;
116     QRect subElementRect(SubElement r, const QStyleOption *opt, const QWidget *widget = nullptr) const override;
117     QRect subControlRect(ComplexControl cc, const QStyleOptionComplex *opt, SubControl sc,
118                          const QWidget *w = nullptr) const override;
119 
120     // These functions are called from QApplication/QWidget. Be careful.
121     QStyle *baseStyle() const;
122     void repolish(QWidget *widget);
123     void repolish(QApplication *app);
124 
125     void unpolish(QWidget *widget) override;
126     void unpolish(QApplication *app) override;
127 
128     QStyle *base;
ref()129     void ref() { ++refcount; }
deref()130     void deref() { Q_ASSERT(refcount > 0); if (!--refcount) delete this; }
131 
132     void updateStyleSheetFont(QWidget* w) const;
133     void saveWidgetFont(QWidget* w, const QFont& font) const;
134     void clearWidgetFont(QWidget* w) const;
135 
136     bool styleSheetPalette(const QWidget* w, const QStyleOption* opt, QPalette* pal);
137 
138 protected:
139     bool event(QEvent *e) override;
140 
141 private:
142     int refcount;
143 
144     friend class QRenderRule;
145     int nativeFrameWidth(const QWidget *);
146     QRenderRule renderRule(const QObject *, int, quint64 = 0) const;
147     QRenderRule renderRule(const QObject *, const QStyleOption *, int = 0) const;
148     QSize defaultSize(const QWidget *, QSize, const QRect&, int) const;
149     QRect positionRect(const QWidget *, const QRenderRule&, const QRenderRule&, int,
150                        const QRect&, Qt::LayoutDirection) const;
151     QRect positionRect(const QWidget *w, const QRenderRule &rule2, int pe,
152                        const QRect &originRect, Qt::LayoutDirection dir) const;
153 
154     mutable QCss::Parser parser;
155 
156     void setPalette(QWidget *);
157     void unsetPalette(QWidget *);
158     void setProperties(QWidget *);
159     void setGeometry(QWidget *);
160     void unsetStyleSheetFont(QWidget *) const;
161     QVector<QCss::StyleRule> styleRules(const QObject *obj) const;
162     bool hasStyleRule(const QObject *obj, int part) const;
163 
164     QHash<QStyle::SubControl, QRect> titleBarLayout(const QWidget *w, const QStyleOptionTitleBar *tb) const;
165 
166     QCss::StyleSheet getDefaultStyleSheet() const;
167 
168     static Qt::Alignment resolveAlignment(Qt::LayoutDirection, Qt::Alignment);
169     static bool isNaturalChild(const QObject *obj);
170     static QPixmap loadPixmap(const QString &fileName, const QObject *context);
171     bool initObject(const QObject *obj) const;
172 public:
173     static int numinstances;
174 
175 private:
176     Q_DISABLE_COPY_MOVE(QStyleSheetStyle)
177     Q_DECLARE_PRIVATE(QStyleSheetStyle)
178 };
179 
180 class QStyleSheetStyleCaches : public QObject
181 {
182     Q_OBJECT
183 public Q_SLOTS:
184     void objectDestroyed(QObject *);
185     void styleDestroyed(QObject *);
186 public:
187     QHash<const QObject *, QVector<QCss::StyleRule> > styleRulesCache;
188     QHash<const QObject *, QHash<int, bool> > hasStyleRuleCache;
189     typedef QHash<int, QHash<quint64, QRenderRule> > QRenderRules;
190     QHash<const QObject *, QRenderRules> renderRulesCache;
191     QHash<const void *, QCss::StyleSheet> styleSheetCache; // parsed style sheets
192     QSet<const QWidget *> autoFillDisabledWidgets;
193     // widgets with whose palettes and fonts we have tampered:
194     template <typename T>
195     struct Tampered {
196         T oldWidgetValue;
197         uint resolveMask;
198 
199         // only call this function on an rvalue *this (it mangles oldWidgetValue)
revertedTampered200         T reverted(T current)
201 #ifdef Q_COMPILER_REF_QUALIFIERS
202         &&
203 #endif
204         {
205             oldWidgetValue.resolve(oldWidgetValue.resolve() & resolveMask);
206             current.resolve(current.resolve() & ~resolveMask);
207             current.resolve(oldWidgetValue);
208             current.resolve(current.resolve() | oldWidgetValue.resolve());
209             return current;
210         }
211     };
212     QHash<const QWidget *, Tampered<QPalette>> customPaletteWidgets;
213     QHash<const QWidget *, Tampered<QFont>> customFontWidgets;
214 };
215 template <typename T>
216 class QTypeInfo<QStyleSheetStyleCaches::Tampered<T>>
217     : QTypeInfoMerger<QStyleSheetStyleCaches::Tampered<T>, T> {};
218 
219 
220 // Returns a QStyleSheet from the given style.
qt_styleSheet(QStyle * style)221 inline QStyleSheetStyle* qt_styleSheet(QStyle *style)
222 {
223     return qobject_cast<QStyleSheetStyle *>(style);
224 }
225 
226 QT_END_NAMESPACE
227 #endif // QT_NO_STYLE_STYLESHEET
228 #endif // QSTYLESHEETSTYLE_P_H
229