summaryrefslogtreecommitdiffstats
path: root/src/gui/text/qcssparser_p.h
blob: 2d21bc2f8af90bf7998c2092439eb3c869e07748 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QCSSPARSER_P_H
#define QCSSPARSER_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of the QLibrary class.  This header file may change from
// version to version without notice, or even be removed.
//
// We mean it.
//

#include <QtCore/QStringList>
#include <QtCore/QVector>
#include <QtCore/QVariant>
#include <QtCore/QPair>
#include <QtCore/QSize>
#include <QtCore/QMultiHash>
#include <QtGui/QFont>
#include <QtGui/QPalette>
#include <QtGui/QIcon>
#include <QtCore/QSharedData>


#ifndef QT_NO_CSSPARSER

// VxWorks defines NONE as (-1) "for times when NULL won't do"
#if defined(Q_OS_VXWORKS) && defined(NONE)
#  undef NONE
#endif

QT_BEGIN_NAMESPACE

namespace QCss
{

enum Property {
    UnknownProperty,
    BackgroundColor,
    Color,
    Float,
    Font,
    FontFamily,
    FontSize,
    FontStyle,
    FontWeight,
    Margin,
    MarginBottom,
    MarginLeft,
    MarginRight,
    MarginTop,
    QtBlockIndent,
    QtListIndent,
    QtParagraphType,
    QtTableType,
    QtUserState,
    TextDecoration,
    TextIndent,
    TextUnderlineStyle,
    VerticalAlignment,
    Whitespace,
    QtSelectionForeground,
    QtSelectionBackground,
    Border,
    BorderLeft,
    BorderRight,
    BorderTop,
    BorderBottom,
    Padding,
    PaddingLeft,
    PaddingRight,
    PaddingTop,
    PaddingBottom,
    PageBreakBefore,
    PageBreakAfter,
    QtAlternateBackground,
    BorderLeftStyle,
    BorderRightStyle,
    BorderTopStyle,
    BorderBottomStyle,
    BorderStyles,
    BorderLeftColor,
    BorderRightColor,
    BorderTopColor,
    BorderBottomColor,
    BorderColor,
    BorderLeftWidth,
    BorderRightWidth,
    BorderTopWidth,
    BorderBottomWidth,
    BorderWidth,
    BorderTopLeftRadius,
    BorderTopRightRadius,
    BorderBottomLeftRadius,
    BorderBottomRightRadius,
    BorderRadius,
    Background,
    BackgroundOrigin,
    BackgroundClip,
    BackgroundRepeat,
    BackgroundPosition,
    BackgroundAttachment,
    BackgroundImage,
    BorderImage,
    QtSpacing,
    Width,
    Height,
    MinimumWidth,
    MinimumHeight,
    MaximumWidth,
    MaximumHeight,
    QtImage,
    Left,
    Right,
    Top,
    Bottom,
    QtOrigin,
    QtPosition,
    Position,
    QtStyleFeatures,
    QtBackgroundRole,
    ListStyleType,
    ListStyle,
    QtImageAlignment,
    TextAlignment,
    Outline,
    OutlineOffset,
    OutlineWidth,
    OutlineColor,
    OutlineStyle,
    OutlineRadius,
    OutlineTopLeftRadius,
    OutlineTopRightRadius,
    OutlineBottomLeftRadius,
    OutlineBottomRightRadius,
    FontVariant,
    TextTransform,
    NumProperties
};

enum KnownValue {
    UnknownValue,
    Value_Normal,
    Value_Pre,
    Value_NoWrap,
    Value_PreWrap,
    Value_Small,
    Value_Medium,
    Value_Large,
    Value_XLarge,
    Value_XXLarge,
    Value_Italic,
    Value_Oblique,
    Value_Bold,
    Value_Underline,
    Value_Overline,
    Value_LineThrough,
    Value_Sub,
    Value_Super,
    Value_Left,
    Value_Right,
    Value_Top,
    Value_Bottom,
    Value_Center,
    Value_Native,
    Value_Solid,
    Value_Dotted,
    Value_Dashed,
    Value_DotDash,
    Value_DotDotDash,
    Value_Double,
    Value_Groove,
    Value_Ridge,
    Value_Inset,
    Value_Outset,
    Value_Wave,
    Value_Middle,
    Value_Auto,
    Value_Always,
    Value_None,
    Value_Transparent,
    Value_Disc,
    Value_Circle,
    Value_Square,
    Value_Decimal,
    Value_LowerAlpha,
    Value_UpperAlpha,
    Value_LowerRoman,
    Value_UpperRoman,
    Value_SmallCaps,
    Value_Uppercase,
    Value_Lowercase,

    /* keep these in same order as QPalette::ColorRole */
    Value_FirstColorRole,
    Value_WindowText = Value_FirstColorRole,
    Value_Button,
    Value_Light,
    Value_Midlight,
    Value_Dark,
    Value_Mid,
    Value_Text,
    Value_BrightText,
    Value_ButtonText,
    Value_Base,
    Value_Window,
    Value_Shadow,
    Value_Highlight,
    Value_HighlightedText,
    Value_Link,
    Value_LinkVisited,
    Value_AlternateBase,
    Value_LastColorRole = Value_AlternateBase,

    Value_Disabled,
    Value_Active,
    Value_Selected,
    Value_On,
    Value_Off,

    NumKnownValues
};

enum BorderStyle {
    BorderStyle_Unknown,
    BorderStyle_None,
    BorderStyle_Dotted,
    BorderStyle_Dashed,
    BorderStyle_Solid,
    BorderStyle_Double,
    BorderStyle_DotDash,
    BorderStyle_DotDotDash,
    BorderStyle_Groove,
    BorderStyle_Ridge,
    BorderStyle_Inset,
    BorderStyle_Outset,
    BorderStyle_Native,
    NumKnownBorderStyles
};

enum Edge {
    TopEdge,
    RightEdge,
    BottomEdge,
    LeftEdge,
    NumEdges
};

enum Corner {
    TopLeftCorner,
    TopRightCorner,
    BottomLeftCorner,
    BottomRightCorner
};

enum TileMode {
    TileMode_Unknown,
    TileMode_Round,
    TileMode_Stretch,
    TileMode_Repeat,
    NumKnownTileModes
};

enum Repeat {
    Repeat_Unknown,
    Repeat_None,
    Repeat_X,
    Repeat_Y,
    Repeat_XY,
    NumKnownRepeats
};

enum Origin {
    Origin_Unknown,
    Origin_Padding,
    Origin_Border,
    Origin_Content,
    Origin_Margin,
    NumKnownOrigins
};

enum PositionMode {
    PositionMode_Unknown,
    PositionMode_Static,
    PositionMode_Relative,
    PositionMode_Absolute,
    PositionMode_Fixed,
    NumKnownPositionModes
};

enum Attachment {
    Attachment_Unknown,
    Attachment_Fixed,
    Attachment_Scroll,
    NumKnownAttachments
};

enum StyleFeature {
    StyleFeature_None = 0,
    StyleFeature_BackgroundColor = 1,
    StyleFeature_BackgroundGradient = 2,
    NumKnownStyleFeatures = 4
};

struct Q_GUI_EXPORT Value
{
    enum Type {
        Unknown,
        Number,
        Percentage,
        Length,
        String,
        Identifier,
        KnownIdentifier,
        Uri,
        Color,
        Function,
        TermOperatorSlash,
        TermOperatorComma
    };
    inline Value() : type(Unknown) { }
    Type type;
    QVariant variant;
    QString toString() const;
};

struct ColorData {
    ColorData() : type(Invalid) {}
    ColorData(const QColor &col) : color(col) , type(Color) {}
    ColorData(QPalette::ColorRole r) : role(r) , type(Role) {}
    QColor color;
    QPalette::ColorRole role;
    enum { Invalid, Color, Role} type;
};

struct BrushData {
    BrushData() : type(Invalid) {}
    BrushData(const QBrush &br) : brush(br) , type(Brush) {}
    BrushData(QPalette::ColorRole r) : role(r) , type(Role) {}
    QBrush brush;
    QPalette::ColorRole role;
    enum { Invalid, Brush, Role, DependsOnThePalette } type;
};

struct BackgroundData {
    BrushData brush;
    QString image;
    Repeat repeat;
    Qt::Alignment alignment;
};

struct LengthData {
    qreal number;
    enum { None, Px, Ex, Em } unit;
};

struct BorderData {
    LengthData width;
    BorderStyle style;
    BrushData color;
};


// 1. StyleRule - x:hover, y:clicked > z:checked { prop1: value1; prop2: value2; }
// 2. QVector<Selector> - x:hover, y:clicked z:checked
// 3. QVector<BasicSelector> - y:clicked z:checked
// 4. QVector<Declaration> - { prop1: value1; prop2: value2; }
// 5. Declaration - prop1: value1;

struct Q_AUTOTEST_EXPORT Declaration
{
    struct DeclarationData : public QSharedData
    {
        inline DeclarationData() : propertyId(UnknownProperty), important(false) {}
        QString property;
        Property propertyId;
        QVector<Value> values;
        QVariant parsed;
        bool important;
    };
    QExplicitlySharedDataPointer<DeclarationData> d;
    inline Declaration() : d(new DeclarationData()) {}
    inline bool isEmpty() const { return d->property.isEmpty() && d->propertyId == UnknownProperty; }

    // helper functions
    QColor colorValue(const QPalette & = QPalette()) const;
    void colorValues(QColor *c, const QPalette & = QPalette()) const;
    QBrush brushValue(const QPalette & = QPalette()) const;
    void brushValues(QBrush *c, const QPalette & = QPalette()) const;

    BorderStyle styleValue() const;
    void styleValues(BorderStyle *s) const;

    Origin originValue() const;
    Repeat repeatValue() const;
    Qt::Alignment alignmentValue() const;
    PositionMode positionValue() const;
    Attachment attachmentValue() const;
    int  styleFeaturesValue() const;

    bool intValue(int *i, const char *unit = 0) const;
    bool realValue(qreal *r, const char *unit = 0) const;

    QSize sizeValue() const;
    QRect rectValue() const;
    QString uriValue() const;
    QIcon iconValue() const;

    void borderImageValue(QString *image, int *cuts, TileMode *h, TileMode *v) const;
};

const quint64 PseudoClass_Unknown          = Q_UINT64_C(0x0000000000000000);
const quint64 PseudoClass_Enabled          = Q_UINT64_C(0x0000000000000001);
const quint64 PseudoClass_Disabled         = Q_UINT64_C(0x0000000000000002);
const quint64 PseudoClass_Pressed          = Q_UINT64_C(0x0000000000000004);
const quint64 PseudoClass_Focus            = Q_UINT64_C(0x0000000000000008);
const quint64 PseudoClass_Hover            = Q_UINT64_C(0x0000000000000010);
const quint64 PseudoClass_Checked          = Q_UINT64_C(0x0000000000000020);
const quint64 PseudoClass_Unchecked        = Q_UINT64_C(0x0000000000000040);
const quint64 PseudoClass_Indeterminate    = Q_UINT64_C(0x0000000000000080);
const quint64 PseudoClass_Unspecified      = Q_UINT64_C(0x0000000000000100);
const quint64 PseudoClass_Selected         = Q_UINT64_C(0x0000000000000200);
const quint64 PseudoClass_Horizontal       = Q_UINT64_C(0x0000000000000400);
const quint64 PseudoClass_Vertical         = Q_UINT64_C(0x0000000000000800);
const quint64 PseudoClass_Window           = Q_UINT64_C(0x0000000000001000);
const quint64 PseudoClass_Children         = Q_UINT64_C(0x0000000000002000);
const quint64 PseudoClass_Sibling          = Q_UINT64_C(0x0000000000004000);
const quint64 PseudoClass_Default          = Q_UINT64_C(0x0000000000008000);
const quint64 PseudoClass_First            = Q_UINT64_C(0x0000000000010000);
const quint64 PseudoClass_Last             = Q_UINT64_C(0x0000000000020000);
const quint64 PseudoClass_Middle           = Q_UINT64_C(0x0000000000040000);
const quint64 PseudoClass_OnlyOne          = Q_UINT64_C(0x0000000000080000);
const quint64 PseudoClass_PreviousSelected = Q_UINT64_C(0x0000000000100000);
const quint64 PseudoClass_NextSelected     = Q_UINT64_C(0x0000000000200000);
const quint64 PseudoClass_Flat             = Q_UINT64_C(0x0000000000400000);
const quint64 PseudoClass_Left             = Q_UINT64_C(0x0000000000800000);
const quint64 PseudoClass_Right            = Q_UINT64_C(0x0000000001000000);
const quint64 PseudoClass_Top              = Q_UINT64_C(0x0000000002000000);
const quint64 PseudoClass_Bottom           = Q_UINT64_C(0x0000000004000000);
const quint64 PseudoClass_Exclusive        = Q_UINT64_C(0x0000000008000000);
const quint64 PseudoClass_NonExclusive     = Q_UINT64_C(0x0000000010000000);
const quint64 PseudoClass_Frameless        = Q_UINT64_C(0x0000000020000000);
const quint64 PseudoClass_ReadOnly         = Q_UINT64_C(0x0000000040000000);
const quint64 PseudoClass_Active           = Q_UINT64_C(0x0000000080000000);
const quint64 PseudoClass_Closable         = Q_UINT64_C(0x0000000100000000);
const quint64 PseudoClass_Movable          = Q_UINT64_C(0x0000000200000000);
const quint64 PseudoClass_Floatable        = Q_UINT64_C(0x0000000400000000);
const quint64 PseudoClass_Minimized        = Q_UINT64_C(0x0000000800000000);
const quint64 PseudoClass_Maximized        = Q_UINT64_C(0x0000001000000000);
const quint64 PseudoClass_On               = Q_UINT64_C(0x0000002000000000);
const quint64 PseudoClass_Off              = Q_UINT64_C(0x0000004000000000);
const quint64 PseudoClass_Editable         = Q_UINT64_C(0x0000008000000000);
const quint64 PseudoClass_Item             = Q_UINT64_C(0x0000010000000000);
const quint64 PseudoClass_Closed           = Q_UINT64_C(0x0000020000000000);
const quint64 PseudoClass_Open             = Q_UINT64_C(0x0000040000000000);
const quint64 PseudoClass_EditFocus        = Q_UINT64_C(0x0000080000000000);
const quint64 PseudoClass_Alternate        = Q_UINT64_C(0x0000100000000000);
// The Any specifier is never generated, but can be used as a wildcard in searches.
const quint64 PseudoClass_Any              = Q_UINT64_C(0x0000ffffffffffff);
const int NumPseudos = 46;

struct Pseudo
{
    Pseudo() : negated(false) { }
    quint64 type;
    QString name;
    QString function;
    bool negated;
};

struct AttributeSelector
{
    enum ValueMatchType {
        NoMatch,
        MatchEqual,
        MatchContains,
        MatchBeginsWith
    };
    inline AttributeSelector() : valueMatchCriterium(NoMatch) {}

    QString name;
    QString value;
    ValueMatchType valueMatchCriterium;
};

struct BasicSelector
{
    inline BasicSelector() : relationToNext(NoRelation) {}

    enum Relation {
        NoRelation,
        MatchNextSelectorIfAncestor,
        MatchNextSelectorIfParent,
        MatchNextSelectorIfPreceeds
    };

    QString elementName;

    QStringList ids;
    QVector<Pseudo> pseudos;
    QVector<AttributeSelector> attributeSelectors;

    Relation relationToNext;
};

struct Q_AUTOTEST_EXPORT Selector
{
    QVector<BasicSelector> basicSelectors;
    int specificity() const;
    quint64 pseudoClass(quint64 *negated = 0) const;
    QString pseudoElement() const;
};

struct StyleRule;
struct MediaRule;
struct PageRule;
struct ImportRule;

struct Q_AUTOTEST_EXPORT ValueExtractor
{
    ValueExtractor(const QVector<Declaration> &declarations, const QPalette & = QPalette());

    bool extractFont(QFont *font, int *fontSizeAdjustment);
    bool extractBackground(QBrush *, QString *, Repeat *, Qt::Alignment *, QCss::Origin *, QCss::Attachment *,
                           QCss::Origin *);
    bool extractGeometry(int *w, int *h, int *minw, int *minh, int *maxw, int *maxh);
    bool extractPosition(int *l, int *t, int *r, int *b, QCss::Origin *, Qt::Alignment *,
                         QCss::PositionMode *, Qt::Alignment *);
    bool extractBox(int *margins, int *paddings, int *spacing = 0);
    bool extractBorder(int *borders, QBrush *colors, BorderStyle *Styles, QSize *radii);
    bool extractOutline(int *borders, QBrush *colors, BorderStyle *Styles, QSize *radii, int *offsets);
    bool extractPalette(QBrush *fg, QBrush *sfg, QBrush *sbg, QBrush *abg);
    int  extractStyleFeatures();
    bool extractImage(QIcon *icon, Qt::Alignment *a, QSize *size);

    int lengthValue(const Declaration &decl);

private:
    void extractFont();
    void borderValue(const Declaration &decl, int *width, QCss::BorderStyle *style, QBrush *color);
    LengthData lengthValue(const Value& v);
    void lengthValues(const Declaration &decl, int *m);
    QSize sizeValue(const Declaration &decl);
    void sizeValues(const Declaration &decl, QSize *radii);

    QVector<Declaration> declarations;
    QFont f;
    int adjustment;
    int fontExtracted;
    QPalette pal;
};

struct StyleRule
{
    StyleRule() : order(0) { }
    QVector<Selector> selectors;
    QVector<Declaration> declarations;
    int order;
};

struct MediaRule
{
    QStringList media;
    QVector<StyleRule> styleRules;
};

struct PageRule
{
    QString selector;
    QVector<Declaration> declarations;
};

struct ImportRule
{
    QString href;
    QStringList media;
};

enum StyleSheetOrigin {
    StyleSheetOrigin_Unspecified,
    StyleSheetOrigin_UserAgent,
    StyleSheetOrigin_User,
    StyleSheetOrigin_Author,
    StyleSheetOrigin_Inline
};

struct StyleSheet
{
    StyleSheet() : origin(StyleSheetOrigin_Unspecified), depth(0) { }
    QVector<StyleRule> styleRules;  //only contains rules that are not indexed
    QVector<MediaRule> mediaRules;
    QVector<PageRule> pageRules;
    QVector<ImportRule> importRules;
    StyleSheetOrigin origin;
    int depth; // applicable only for inline style sheets
    QMultiHash<QString, StyleRule> nameIndex;
    QMultiHash<QString, StyleRule> idIndex;
    void buildIndexes(Qt::CaseSensitivity nameCaseSensitivity = Qt::CaseSensitive);
};

class Q_GUI_EXPORT StyleSelector
{
public:
    StyleSelector() : nameCaseSensitivity(Qt::CaseSensitive)  {}
    virtual ~StyleSelector();

    union NodePtr {
        void *ptr;
        int id;
    };

    QVector<StyleRule> styleRulesForNode(NodePtr node);
    QVector<Declaration> declarationsForNode(NodePtr node, const char *extraPseudo = 0);

    virtual bool nodeNameEquals(NodePtr node, const QString& nodeName) const;
    virtual QString attribute(NodePtr node, const QString &name) const = 0;
    virtual bool hasAttributes(NodePtr node) const = 0;
    virtual QStringList nodeIds(NodePtr node) const;
    virtual QStringList nodeNames(NodePtr node) const = 0;
    virtual bool isNullNode(NodePtr node) const = 0;
    virtual NodePtr parentNode(NodePtr node) const = 0;
    virtual NodePtr previousSiblingNode(NodePtr node) const = 0;
    virtual NodePtr duplicateNode(NodePtr node) const = 0;
    virtual void freeNode(NodePtr node) const = 0;

    QVector<StyleSheet> styleSheets;
    QString medium;
    Qt::CaseSensitivity nameCaseSensitivity;
private:
    void matchRule(NodePtr node, const StyleRule &rules, StyleSheetOrigin origin,
                    int depth, QMap<uint, StyleRule> *weightedRules);
    bool selectorMatches(const Selector &rule, NodePtr node);
    bool basicSelectorMatches(const BasicSelector &rule, NodePtr node);
};

enum TokenType {
    NONE,

    S,

    CDO,
    CDC,
    INCLUDES,
    DASHMATCH,

    LBRACE,
    PLUS,
    GREATER,
    COMMA,

    STRING,
    INVALID,

    IDENT,

    HASH,

    ATKEYWORD_SYM,

    EXCLAMATION_SYM,

    LENGTH,

    PERCENTAGE,
    NUMBER,

    FUNCTION,

    COLON,
    SEMICOLON,
    RBRACE,
    SLASH,
    MINUS,
    DOT,
    STAR,
    LBRACKET,
    RBRACKET,
    EQUAL,
    LPAREN,
    RPAREN,
    OR
};

struct Q_GUI_EXPORT Symbol
{
    inline Symbol() : start(0), len(-1) {}
    TokenType token;
    QString text;
    int start, len;
    QString lexem() const;
};

class Q_AUTOTEST_EXPORT Scanner
{
public:
    static QString preprocess(const QString &input, bool *hasEscapeSequences = 0);
    static void scan(const QString &preprocessedInput, QVector<Symbol> *symbols);
};

class Q_GUI_EXPORT Parser
{
public:
    Parser();
    Parser(const QString &css, bool file = false);

    void init(const QString &css, bool file = false);
    bool parse(StyleSheet *styleSheet, Qt::CaseSensitivity nameCaseSensitivity = Qt::CaseSensitive);
    Symbol errorSymbol();

    bool parseImport(ImportRule *importRule);
    bool parseMedia(MediaRule *mediaRule);
    bool parseMedium(QStringList *media);
    bool parsePage(PageRule *pageRule);
    bool parsePseudoPage(QString *selector);
    bool parseNextOperator(Value *value);
    bool parseCombinator(BasicSelector::Relation *relation);
    bool parseProperty(Declaration *decl);
    bool parseRuleset(StyleRule *styleRule);
    bool parseSelector(Selector *sel);
    bool parseSimpleSelector(BasicSelector *basicSel);
    bool parseClass(QString *name);
    bool parseElementName(QString *name);
    bool parseAttrib(AttributeSelector *attr);
    bool parsePseudo(Pseudo *pseudo);
    bool parseNextDeclaration(Declaration *declaration);
    bool parsePrio(Declaration *declaration);
    bool parseExpr(QVector<Value> *values);
    bool parseTerm(Value *value);
    bool parseFunction(QString *name, QString *args);
    bool parseHexColor(QColor *col);
    bool testAndParseUri(QString *uri);

    inline bool testRuleset() { return testSelector(); }
    inline bool testSelector() { return testSimpleSelector(); }
    inline bool parseNextSelector(Selector *sel) { if (!testSelector()) return recordError(); return parseSelector(sel); }
    bool testSimpleSelector();
    inline bool parseNextSimpleSelector(BasicSelector *basicSel) { if (!testSimpleSelector()) return recordError(); return parseSimpleSelector(basicSel); }
    inline bool testElementName() { return test(IDENT) || test(STAR); }
    inline bool testClass() { return test(DOT); }
    inline bool testAttrib() { return test(LBRACKET); }
    inline bool testPseudo() { return test(COLON); }
    inline bool testMedium() { return test(IDENT); }
    inline bool parseNextMedium(QStringList *media) { if (!testMedium()) return recordError(); return parseMedium(media); }
    inline bool testPseudoPage() { return test(COLON); }
    inline bool testImport() { return testTokenAndEndsWith(ATKEYWORD_SYM, QLatin1String("import")); }
    inline bool testMedia() { return testTokenAndEndsWith(ATKEYWORD_SYM, QLatin1String("media")); }
    inline bool testPage() { return testTokenAndEndsWith(ATKEYWORD_SYM, QLatin1String("page")); }
    inline bool testCombinator() { return test(PLUS) || test(GREATER) || test(S); }
    inline bool testProperty() { return test(IDENT); }
    bool testTerm();
    inline bool testExpr() { return testTerm(); }
    inline bool parseNextExpr(QVector<Value> *values) { if (!testExpr()) return recordError(); return parseExpr(values); }
    bool testPrio();
    inline bool testHexColor() { return test(HASH); }
    inline bool testFunction() { return test(FUNCTION); }
    inline bool parseNextFunction(QString *name, QString *args) { if (!testFunction()) return recordError(); return parseFunction(name, args); }

    inline bool lookupElementName() const { return lookup() == IDENT || lookup() == STAR; }

    inline void skipSpace() { while (test(S)) {}; }

    inline bool hasNext() const { return index < symbols.count(); }
    inline TokenType next() { return symbols.at(index++).token; }
    bool next(TokenType t);
    bool test(TokenType t);
    inline void prev() { index--; }
    inline const Symbol &symbol() const { return symbols.at(index - 1); }
    inline QString lexem() const { return symbol().lexem(); }
    QString unquotedLexem() const;
    QString lexemUntil(TokenType t);
    bool until(TokenType target, TokenType target2 = NONE);
    inline TokenType lookup() const {
        return (index - 1) < symbols.count() ? symbols.at(index - 1).token : NONE;
    }

    bool testTokenAndEndsWith(TokenType t, const QLatin1String &str);

    inline bool recordError() { errorIndex = index; return false; }

    QVector<Symbol> symbols;
    int index;
    int errorIndex;
    bool hasEscapeSequences;
    QString sourcePath;
};

} // namespace QCss

QT_END_NAMESPACE

Q_DECLARE_METATYPE( QCss::BackgroundData )
Q_DECLARE_METATYPE( QCss::LengthData )
Q_DECLARE_METATYPE( QCss::BorderData )


#endif // QT_NO_CSSPARSER

#endif