fractorium/Source/Fractorium/qcssparser.cpp

/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, 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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "FractoriumPch.h"
#include "qcssscanner.h"

/// <summary>
/// The code in this file did not originate in Fractorium.
/// It was taken either in whole or in part from the source code
/// of Qt Creator. Their license applies.
/// </summary>

using namespace QCss;

struct QCssKnownValue
{
	const char *name;
	quint64 id;
};

static const QCssKnownValue properties[NumProperties - 1] = {
	{ "-qt-background-role", QtBackgroundRole },
	{ "-qt-block-indent", QtBlockIndent },
	{ "-qt-list-indent", QtListIndent },
	{ "-qt-list-number-prefix", QtListNumberPrefix },
	{ "-qt-list-number-suffix", QtListNumberSuffix },
	{ "-qt-paragraph-type", QtParagraphType },
	{ "-qt-style-features", QtStyleFeatures },
	{ "-qt-table-type", QtTableType },
	{ "-qt-user-state", QtUserState },
	{ "alternate-background-color", QtAlternateBackground },
	{ "background", Background },
	{ "background-attachment", BackgroundAttachment },
	{ "background-clip", BackgroundClip },
	{ "background-color", BackgroundColor },
	{ "background-image", BackgroundImage },
	{ "background-origin", BackgroundOrigin },
	{ "background-position", BackgroundPosition },
	{ "background-repeat", BackgroundRepeat },
	{ "border", Border },
	{ "border-bottom", BorderBottom },
	{ "border-bottom-color", BorderBottomColor },
	{ "border-bottom-left-radius", BorderBottomLeftRadius },
	{ "border-bottom-right-radius", BorderBottomRightRadius },
	{ "border-bottom-style", BorderBottomStyle },
	{ "border-bottom-width", BorderBottomWidth },
	{ "border-color", BorderColor },
	{ "border-image", BorderImage },
	{ "border-left", BorderLeft },
	{ "border-left-color", BorderLeftColor },
	{ "border-left-style", BorderLeftStyle },
	{ "border-left-width", BorderLeftWidth },
	{ "border-radius", BorderRadius },
	{ "border-right", BorderRight },
	{ "border-right-color", BorderRightColor },
	{ "border-right-style", BorderRightStyle },
	{ "border-right-width", BorderRightWidth },
	{ "border-style", BorderStyles },
	{ "border-top", BorderTop },
	{ "border-top-color", BorderTopColor },
	{ "border-top-left-radius", BorderTopLeftRadius },
	{ "border-top-right-radius", BorderTopRightRadius },
	{ "border-top-style", BorderTopStyle },
	{ "border-top-width", BorderTopWidth },
	{ "border-width", BorderWidth },
	{ "bottom", Bottom },
	{ "color", Property::Color },
	{ "float", Float },
	{ "font", QCss::Font },
	{ "font-family", FontFamily },
	{ "font-size", FontSize },
	{ "font-style", FontStyle },
	{ "font-variant", FontVariant },
	{ "font-weight", FontWeight },
	{ "height", Height },
	{ "image", QtImage },
	{ "image-position", QtImageAlignment },
	{ "left", Left },
	{ "line-height", LineHeight },
	{ "list-style", ListStyle },
	{ "list-style-type", ListStyleType },
	{ "margin" , Margin },
	{ "margin-bottom", MarginBottom },
	{ "margin-left", MarginLeft },
	{ "margin-right", MarginRight },
	{ "margin-top", MarginTop },
	{ "max-height", MaximumHeight },
	{ "max-width", MaximumWidth },
	{ "min-height", MinimumHeight },
	{ "min-width", MinimumWidth },
	{ "outline", Outline },
	{ "outline-bottom-left-radius", OutlineBottomLeftRadius },
	{ "outline-bottom-right-radius", OutlineBottomRightRadius },
	{ "outline-color", OutlineColor },
	{ "outline-offset", OutlineOffset },
	{ "outline-radius", OutlineRadius },
	{ "outline-style", OutlineStyle },
	{ "outline-top-left-radius", OutlineTopLeftRadius },
	{ "outline-top-right-radius", OutlineTopRightRadius },
	{ "outline-width", OutlineWidth },
	{ "padding", Padding },
	{ "padding-bottom", PaddingBottom },
	{ "padding-left", PaddingLeft },
	{ "padding-right", PaddingRight },
	{ "padding-top", PaddingTop },
	{ "page-break-after", PageBreakAfter },
	{ "page-break-before", PageBreakBefore },
	{ "position", Position },
	{ "right", Right },
	{ "selection-background-color", QtSelectionBackground },
	{ "selection-color", QtSelectionForeground },
	{ "spacing", QtSpacing },
	{ "subcontrol-origin", QtOrigin },
	{ "subcontrol-position", QtPosition },
	{ "text-align", TextAlignment },
	{ "text-decoration", TextDecoration },
	{ "text-indent", TextIndent },
	{ "text-transform", TextTransform },
	{ "text-underline-style", TextUnderlineStyle },
	{ "top", Top },
	{ "vertical-align", VerticalAlignment },
	{ "white-space", Whitespace },
	{ "width", Width }
};

static const QCssKnownValue values[NumKnownValues - 1] = {
	{ "active", Value_Active },
	{ "alternate-base", Value_AlternateBase },
	{ "always", Value_Always },
	{ "auto", Value_Auto },
	{ "base", Value_Base },
	{ "bold", Value_Bold },
	{ "bottom", Value_Bottom },
	{ "bright-text", Value_BrightText },
	{ "button", Value_Button },
	{ "button-text", Value_ButtonText },
	{ "center", Value_Center },
	{ "circle", Value_Circle },
	{ "dark", Value_Dark },
	{ "dashed", Value_Dashed },
	{ "decimal", Value_Decimal },
	{ "disabled", Value_Disabled },
	{ "disc", Value_Disc },
	{ "dot-dash", Value_DotDash },
	{ "dot-dot-dash", Value_DotDotDash },
	{ "dotted", Value_Dotted },
	{ "double", Value_Double },
	{ "groove", Value_Groove },
	{ "highlight", Value_Highlight },
	{ "highlighted-text", Value_HighlightedText },
	{ "inset", Value_Inset },
	{ "italic", Value_Italic },
	{ "large", Value_Large },
	{ "left", Value_Left },
	{ "light", Value_Light },
	{ "line-through", Value_LineThrough },
	{ "link", Value_Link },
	{ "link-visited", Value_LinkVisited },
	{ "lower-alpha", Value_LowerAlpha },
	{ "lower-roman", Value_LowerRoman },
	{ "lowercase", Value_Lowercase },
	{ "medium", Value_Medium },
	{ "mid", Value_Mid },
	{ "middle", Value_Middle },
	{ "midlight", Value_Midlight },
	{ "native", Value_Native },
	{ "none", Value_None },
	{ "normal", Value_Normal },
	{ "nowrap", Value_NoWrap },
	{ "oblique", Value_Oblique },
	{ "off", Value_Off },
	{ "on", Value_On },
	{ "outset", Value_Outset },
	{ "overline", Value_Overline },
	{ "pre", Value_Pre },
	{ "pre-wrap", Value_PreWrap },
	{ "ridge", Value_Ridge },
	{ "right", Value_Right },
	{ "selected", Value_Selected },
	{ "shadow", Value_Shadow },
	{ "small" , Value_Small },
	{ "small-caps", Value_SmallCaps },
	{ "solid", Value_Solid },
	{ "square", Value_Square },
	{ "sub", Value_Sub },
	{ "super", Value_Super },
	{ "text", Value_Text },
	{ "top", Value_Top },
	{ "transparent", Value_Transparent },
	{ "underline", Value_Underline },
	{ "upper-alpha", Value_UpperAlpha },
	{ "upper-roman", Value_UpperRoman },
	{ "uppercase", Value_Uppercase },
	{ "wave", Value_Wave },
	{ "window", Value_Window },
	{ "window-text", Value_WindowText },
	{ "x-large", Value_XLarge },
	{ "xx-large", Value_XXLarge }
};

//Map id to strings as they appears in the 'values' array above
static const short indexOfId[NumKnownValues] = { 0, 41, 48, 42, 49, 54, 35, 26, 70, 71, 25, 43, 5, 63, 47,
	29, 58, 59, 27, 51, 61, 6, 10, 39, 56, 19, 13, 17, 18, 20, 21, 50, 24, 46, 67, 37, 3, 2, 40, 62, 16,
	11, 57, 14, 32, 64, 33, 65, 55, 66, 34, 69, 8, 28, 38, 12, 36, 60, 7, 9, 4, 68, 53, 22, 23, 30, 31,
	1, 15, 0, 52, 45, 44 };

QString Value::toString() const
{
	if (type == KnownIdentifier) {
		return QLatin1String(values[indexOfId[variant.toInt()]].name);
	} else {
		return variant.toString();
	}
}

static const QCssKnownValue pseudos[NumPseudos - 1] = {
	{ "active", PseudoClass_Active },
	{ "adjoins-item", PseudoClass_Item },
	{ "alternate", PseudoClass_Alternate },
	{ "bottom", PseudoClass_Bottom },
	{ "checked", PseudoClass_Checked },
	{ "closable", PseudoClass_Closable },
	{ "closed", PseudoClass_Closed },
	{ "default", PseudoClass_Default },
	{ "disabled", PseudoClass_Disabled },
	{ "edit-focus", PseudoClass_EditFocus },
	{ "editable", PseudoClass_Editable },
	{ "enabled", PseudoClass_Enabled },
	{ "exclusive", PseudoClass_Exclusive },
	{ "first", PseudoClass_First },
	{ "flat", PseudoClass_Flat },
	{ "floatable", PseudoClass_Floatable },
	{ "focus", PseudoClass_Focus },
	{ "has-children", PseudoClass_Children },
	{ "has-siblings", PseudoClass_Sibling },
	{ "horizontal", PseudoClass_Horizontal },
	{ "hover", PseudoClass_Hover },
	{ "indeterminate" , PseudoClass_Indeterminate },
	{ "last", PseudoClass_Last },
	{ "left", PseudoClass_Left },
	{ "maximized", PseudoClass_Maximized },
	{ "middle", PseudoClass_Middle },
	{ "minimized", PseudoClass_Minimized },
	{ "movable", PseudoClass_Movable },
	{ "next-selected", PseudoClass_NextSelected },
	{ "no-frame", PseudoClass_Frameless },
	{ "non-exclusive", PseudoClass_NonExclusive },
	{ "off", PseudoClass_Unchecked },
	{ "on", PseudoClass_Checked },
	{ "only-one", PseudoClass_OnlyOne },
	{ "open", PseudoClass_Open },
	{ "pressed", PseudoClass_Pressed },
	{ "previous-selected", PseudoClass_PreviousSelected },
	{ "read-only", PseudoClass_ReadOnly },
	{ "right", PseudoClass_Right },
	{ "selected", PseudoClass_Selected },
	{ "top", PseudoClass_Top },
	{ "unchecked" , PseudoClass_Unchecked },
	{ "vertical", PseudoClass_Vertical },
	{ "window", PseudoClass_Window }
};

static const QCssKnownValue origins[NumKnownOrigins - 1] = {
	{ "border", Origin_Border },
	{ "content", Origin_Content },
	{ "margin", Origin_Margin }, // not in css
	{ "padding", Origin_Padding }
};

static const QCssKnownValue repeats[NumKnownRepeats - 1] = {
	{ "no-repeat", Repeat_None },
	{ "repeat-x", Repeat_X },
	{ "repeat-xy", Repeat_XY },
	{ "repeat-y", Repeat_Y }
};

static const QCssKnownValue tileModes[NumKnownTileModes - 1] = {
	{ "repeat", TileMode_Repeat },
	{ "round", TileMode_Round },
	{ "stretch", TileMode_Stretch },
};

static const QCssKnownValue positions[NumKnownPositionModes - 1] = {
	{ "absolute", PositionMode_Absolute },
	{ "fixed", PositionMode_Fixed },
	{ "relative", PositionMode_Relative },
	{ "static", PositionMode_Static }
};

static const QCssKnownValue attachments[NumKnownAttachments - 1] = {
	{ "fixed", Attachment_Fixed },
	{ "scroll", Attachment_Scroll }
};

static const QCssKnownValue styleFeatures[NumKnownStyleFeatures - 1] = {
	{ "background-color", StyleFeature_BackgroundColor },
	{ "background-gradient", StyleFeature_BackgroundGradient },
	{ "none", StyleFeature_None }
};

#if defined(Q_CC_MSVC) && _MSC_VER < 1600
Q_STATIC_GLOBAL_OPERATOR bool operator<(const QCssKnownValue &prop1, const QCssKnownValue &prop2)
{
	return QString::compare(QString::fromLatin1(prop1.name), QLatin1String(prop2.name), Qt::CaseInsensitive) < 0;
}
#endif

Q_STATIC_GLOBAL_OPERATOR bool operator<(const QString &name, const QCssKnownValue &prop)
{
	return QString::compare(name, QLatin1String(prop.name), Qt::CaseInsensitive) < 0;
}

Q_STATIC_GLOBAL_OPERATOR bool operator<(const QCssKnownValue &prop, const QString &name)
{
	return QString::compare(QLatin1String(prop.name), name, Qt::CaseInsensitive) < 0;
}

static quint64 findKnownValue(const QString &name, const QCssKnownValue *start, int numValues)
{
	const QCssKnownValue *end = &start[numValues - 1];
	const QCssKnownValue *prop = std::lower_bound(start, end, name);
	if ((prop == end) || (name < *prop))
		return 0;
	return prop->id;
}

///////////////////////////////////////////////////////////////////////////////
// Value Extractor
ValueExtractor::ValueExtractor(const QVector<Declaration> &decls, const QPalette &pal)
: declarations(decls), adjustment(0), fontExtracted(false), pal(pal)
{
}

LengthData ValueExtractor::lengthValue(const Value& v)
{
	QString s = v.variant.toString();
	s.reserve(s.length());
	LengthData data;
	data.unit = LengthData::NONE;
	if (s.endsWith(QLatin1String("px"), Qt::CaseInsensitive))
		data.unit = LengthData::Px;
	else if (s.endsWith(QLatin1String("ex"), Qt::CaseInsensitive))
		data.unit = LengthData::Ex;
	else if (s.endsWith(QLatin1String("em"), Qt::CaseInsensitive))
		data.unit = LengthData::Em;

	if (data.unit != LengthData::NONE)
		s.chop(2);

	data.number = s.toDouble();
	return data;
}

static int lengthValueFromData(const LengthData& data, const QFont& f)
{
	if (data.unit == LengthData::Ex)
		return qRound(QFontMetrics(f).xHeight() * data.number);
	else if (data.unit == LengthData::Em)
		return qRound(QFontMetrics(f).height() * data.number);
	return qRound(data.number);
}

int ValueExtractor::lengthValue(const Declaration &decl)
{
	if (decl.d->parsed.isValid())
		return  lengthValueFromData(qvariant_cast<LengthData>(decl.d->parsed), f);
	if (decl.d->values.count() < 1)
		return 0;
	LengthData data = lengthValue(decl.d->values.at(0));
	decl.d->parsed = QVariant::fromValue<LengthData>(data);
	return lengthValueFromData(data,f);
}

void ValueExtractor::lengthValues(const Declaration &decl, int *m)
{
	if (decl.d->parsed.isValid()) {
		QList<QVariant> v = decl.d->parsed.toList();
		for (int i = 0; i < 4; i++)
			m[i] = lengthValueFromData(qvariant_cast<LengthData>(v.at(i)), f);
		return;
	}

	LengthData datas[4];
	int i;
	for (i = 0; i < qMin(decl.d->values.count(), 4); i++)
		datas[i] = lengthValue(decl.d->values[i]);

	if (i == 0) {
		LengthData zero = {0.0, LengthData::NONE};
		datas[0] = datas[1] = datas[2] = datas[3] = zero;
	} else if (i == 1) {
		datas[3] = datas[2] = datas[1] = datas[0];
	} else if (i == 2) {
		datas[2] = datas[0];
		datas[3] = datas[1];
	} else if (i == 3) {
		datas[3] = datas[1];
	}

	QList<QVariant> v;
	for (i = 0; i < 4; i++) {
		v += QVariant::fromValue<LengthData>(datas[i]);
		m[i] = lengthValueFromData(datas[i], f);
	}
	decl.d->parsed = v;
}

bool ValueExtractor::extractGeometry(int *w, int *h, int *minw, int *minh, int *maxw, int *maxh)
{
	extractFont();
	bool hit = false;
	for (int i = 0; i < declarations.count(); i++) {
		const Declaration &decl = declarations.at(i);
		switch (decl.d->propertyId) {
		case Width: *w = lengthValue(decl); break;
		case Height: *h = lengthValue(decl); break;
		case MinimumWidth: *minw = lengthValue(decl); break;
		case MinimumHeight: *minh = lengthValue(decl); break;
		case MaximumWidth: *maxw = lengthValue(decl); break;
		case MaximumHeight: *maxh = lengthValue(decl); break;
		default: continue;
		}
		hit = true;
	}

	return hit;
}

bool ValueExtractor::extractPosition(int *left, int *top, int *right, int *bottom, QCss::Origin *origin,
									 Qt::Alignment *position, QCss::PositionMode *mode, Qt::Alignment *textAlignment)
{
	extractFont();
	bool hit = false;
	for (int i = 0; i < declarations.count(); i++) {
		const Declaration &decl = declarations.at(i);
		switch (decl.d->propertyId) {
		case Left: *left = lengthValue(decl); break;
		case Top: *top = lengthValue(decl); break;
		case Right: *right = lengthValue(decl); break;
		case Bottom: *bottom = lengthValue(decl); break;
		case QtOrigin: *origin = decl.originValue(); break;
		case QtPosition: *position = decl.alignmentValue(); break;
		case TextAlignment: *textAlignment = decl.alignmentValue(); break;
		case Position: *mode = decl.positionValue(); break;
		default: continue;
		}
		hit = true;
	}

	return hit;
}

bool ValueExtractor::extractBox(int *margins, int *paddings, int *spacing)
{
	extractFont();
	bool hit = false;
	for (int i = 0; i < declarations.count(); i++) {
		const Declaration &decl = declarations.at(i);
		switch (decl.d->propertyId) {
		case PaddingLeft: paddings[LeftEdge] = lengthValue(decl); break;
		case PaddingRight: paddings[RightEdge] = lengthValue(decl); break;
		case PaddingTop: paddings[TopEdge] = lengthValue(decl); break;
		case PaddingBottom: paddings[BottomEdge] = lengthValue(decl); break;
		case Padding: lengthValues(decl, paddings); break;

		case MarginLeft: margins[LeftEdge] = lengthValue(decl); break;
		case MarginRight: margins[RightEdge] = lengthValue(decl); break;
		case MarginTop: margins[TopEdge] = lengthValue(decl); break;
		case MarginBottom: margins[BottomEdge] = lengthValue(decl); break;
		case Margin: lengthValues(decl, margins); break;
		case QtSpacing: if (spacing) *spacing = lengthValue(decl); break;

		default: continue;
		}
		hit = true;
	}

	return hit;
}

int ValueExtractor::extractStyleFeatures()
{
	int features = StyleFeature_None;
	for (int i = 0; i < declarations.count(); i++) {
		const Declaration &decl = declarations.at(i);
		if (decl.d->propertyId == QtStyleFeatures)
			features = decl.styleFeaturesValue();
	}
	return features;
}

QSize ValueExtractor::sizeValue(const Declaration &decl)
{
	if (decl.d->parsed.isValid()) {
		QList<QVariant> v = decl.d->parsed.toList();
		return QSize(lengthValueFromData(qvariant_cast<LengthData>(v.at(0)), f),
					 lengthValueFromData(qvariant_cast<LengthData>(v.at(1)), f));
	}

	LengthData x[2] = { {0, LengthData::NONE }, {0, LengthData::NONE} };
	if (decl.d->values.count() > 0)
		x[0] = lengthValue(decl.d->values.at(0));
	if (decl.d->values.count() > 1)
		x[1] = lengthValue(decl.d->values.at(1));
	else
		x[1] = x[0];
	QList<QVariant> v;
	v << QVariant::fromValue<LengthData>(x[0]) << QVariant::fromValue<LengthData>(x[1]);
	decl.d->parsed = v;
	return QSize(lengthValueFromData(x[0], f), lengthValueFromData(x[1], f));
}

void ValueExtractor::sizeValues(const Declaration &decl, QSize *radii)
{
	radii[0] = sizeValue(decl);
	for (int i = 1; i < 4; i++)
		radii[i] = radii[0];
}

bool ValueExtractor::extractBorder(int *borders, QBrush *colors, BorderStyle *styles,
								   QSize *radii)
{
	extractFont();
	bool hit = false;
	for (int i = 0; i < declarations.count(); i++) {
		const Declaration &decl = declarations.at(i);
		switch (decl.d->propertyId) {
		case BorderLeftWidth: borders[LeftEdge] = lengthValue(decl); break;
		case BorderRightWidth: borders[RightEdge] = lengthValue(decl); break;
		case BorderTopWidth: borders[TopEdge] = lengthValue(decl); break;
		case BorderBottomWidth: borders[BottomEdge] = lengthValue(decl); break;
		case BorderWidth: lengthValues(decl, borders); break;

		case BorderLeftColor: colors[LeftEdge] = decl.brushValue(pal); break;
		case BorderRightColor: colors[RightEdge] = decl.brushValue(pal); break;
		case BorderTopColor: colors[TopEdge] = decl.brushValue(pal); break;
		case BorderBottomColor: colors[BottomEdge] = decl.brushValue(pal); break;
		case BorderColor: decl.brushValues(colors, pal); break;

		case BorderTopStyle: styles[TopEdge] = decl.styleValue(); break;
		case BorderBottomStyle: styles[BottomEdge] = decl.styleValue(); break;
		case BorderLeftStyle: styles[LeftEdge] = decl.styleValue(); break;
		case BorderRightStyle: styles[RightEdge] = decl.styleValue(); break;
		case BorderStyles:  decl.styleValues(styles); break;

#ifndef QT_OS_ANDROID_GCC_48_WORKAROUND
		case BorderTopLeftRadius: radii[0] = sizeValue(decl); break;
#else
		case BorderTopLeftRadius: new(radii)QSize(sizeValue(decl)); break;
#endif
		case BorderTopRightRadius: radii[1] = sizeValue(decl); break;
		case BorderBottomLeftRadius: radii[2] = sizeValue(decl); break;
		case BorderBottomRightRadius: radii[3] = sizeValue(decl); break;
		case BorderRadius: sizeValues(decl, radii); break;

		case BorderLeft:
			borderValue(decl, &borders[LeftEdge], &styles[LeftEdge], &colors[LeftEdge]);
			break;
		case BorderTop:
			borderValue(decl, &borders[TopEdge], &styles[TopEdge], &colors[TopEdge]);
			break;
		case BorderRight:
			borderValue(decl, &borders[RightEdge], &styles[RightEdge], &colors[RightEdge]);
			break;
		case BorderBottom:
			borderValue(decl, &borders[BottomEdge], &styles[BottomEdge], &colors[BottomEdge]);
			break;
		case Border:
			borderValue(decl, &borders[LeftEdge], &styles[LeftEdge], &colors[LeftEdge]);
			borders[TopEdge] = borders[RightEdge] = borders[BottomEdge] = borders[LeftEdge];
			styles[TopEdge] = styles[RightEdge] = styles[BottomEdge] = styles[LeftEdge];
			colors[TopEdge] = colors[RightEdge] = colors[BottomEdge] = colors[LeftEdge];
			break;

		default: continue;
		}
		hit = true;
	}

	return hit;
}

bool ValueExtractor::extractOutline(int *borders, QBrush *colors, BorderStyle *styles,
								   QSize *radii, int *offsets)
{
	extractFont();
	bool hit = false;
	for (int i = 0; i < declarations.count(); i++) {
		const Declaration &decl = declarations.at(i);
		switch (decl.d->propertyId) {
		case OutlineWidth: lengthValues(decl, borders); break;
		case OutlineColor: decl.brushValues(colors, pal); break;
		case OutlineStyle:  decl.styleValues(styles); break;

		case OutlineTopLeftRadius: radii[0] = sizeValue(decl); break;
		case OutlineTopRightRadius: radii[1] = sizeValue(decl); break;
		case OutlineBottomLeftRadius: radii[2] = sizeValue(decl); break;
		case OutlineBottomRightRadius: radii[3] = sizeValue(decl); break;
		case OutlineRadius: sizeValues(decl, radii); break;
		case OutlineOffset: lengthValues(decl, offsets); break;

		case Outline:
			borderValue(decl, &borders[LeftEdge], &styles[LeftEdge], &colors[LeftEdge]);
			borders[TopEdge] = borders[RightEdge] = borders[BottomEdge] = borders[LeftEdge];
			styles[TopEdge] = styles[RightEdge] = styles[BottomEdge] = styles[LeftEdge];
			colors[TopEdge] = colors[RightEdge] = colors[BottomEdge] = colors[LeftEdge];
			break;

		default: continue;
		}
		hit = true;
	}

	return hit;
}

static Qt::Alignment parseAlignment(const QCss::Value *values, int count)
{
	Qt::Alignment a[2] = { 0, 0 };
	for (int i = 0; i < qMin(2, count); i++) {
		if (values[i].type != Value::KnownIdentifier)
			break;
		switch (values[i].variant.toInt()) {
		case Value_Left: a[i] = Qt::AlignLeft; break;
		case Value_Right: a[i] = Qt::AlignRight; break;
		case Value_Top: a[i] = Qt::AlignTop; break;
		case Value_Bottom: a[i] = Qt::AlignBottom; break;
		case Value_Center: a[i] = Qt::AlignCenter; break;
		default: break;
		}
	}

	if (a[0] == Qt::AlignCenter && a[1] != 0 && a[1] != Qt::AlignCenter)
		a[0] = (a[1] == Qt::AlignLeft || a[1] == Qt::AlignRight) ? Qt::AlignVCenter : Qt::AlignHCenter;
	if ((a[1] == 0 || a[1] == Qt::AlignCenter) && a[0] != Qt::AlignCenter)
		a[1] = (a[0] == Qt::AlignLeft || a[0] == Qt::AlignRight) ? Qt::AlignVCenter : Qt::AlignHCenter;
	return a[0] | a[1];
}

static ColorData parseColorValue(QCss::Value v)
{
	if (v.type == Value::Identifier || v.type == Value::String) {
		v.variant.convert(QVariant::Color);
		v.type = Value::Color;
	}

	if (v.type == Value::Color)
		return qvariant_cast<QColor>(v.variant);

	if (v.type == Value::KnownIdentifier && v.variant.toInt() == Value_Transparent)
		return QColor(Qt::transparent);

	if (v.type != Value::Function)
		return ColorData();

	QStringList lst = v.variant.toStringList();
	if (lst.count() != 2)
		return ColorData();

	if ((lst.at(0).compare(QLatin1String("palette"), Qt::CaseInsensitive)) == 0) {
		int role = findKnownValue(lst.at(1).trimmed(), values, NumKnownValues);
		if (role >= Value_FirstColorRole && role <= Value_LastColorRole)
			return (QPalette::ColorRole)(role-Value_FirstColorRole);

		return ColorData();
	}

	bool rgb = lst.at(0).startsWith(QLatin1String("rgb"));
	bool rgba = lst.at(0).startsWith(QLatin1String("rgba"));

	Parser p(lst.at(1));
	if (!p.testExpr())
		return ColorData();

	QVector<QCss::Value> colorDigits;
	if (!p.parseExpr(&colorDigits))
		return ColorData();

	for (int i = 0; i < qMin(colorDigits.count(), 7); i += 2) {
		if (colorDigits.at(i).type == Value::Percentage) {
			colorDigits[i].variant = colorDigits.at(i).variant.toReal() * (255. / 100.);
			colorDigits[i].type = Value::Number;
		} else if (colorDigits.at(i).type != Value::Number) {
			return ColorData();
		}
	}

	int v1 = colorDigits.at(0).variant.toInt();
	int v2 = colorDigits.at(2).variant.toInt();
	int v3 = colorDigits.at(4).variant.toInt();
	int alpha = 255;
	if (colorDigits.count() >= 7) {
		int alphaValue = colorDigits.at(6).variant.toInt();
		if (rgba && alphaValue <= 1)
			alpha = colorDigits.at(6).variant.toReal() * 255.;
		else
			alpha = alphaValue;
	}

	return rgb ? QColor::fromRgb(v1, v2, v3, alpha)
			   : QColor::fromHsv(v1, v2, v3, alpha);
}

static QColor colorFromData(const ColorData& c, const QPalette &pal)
{
	if (c.type == ColorData::Color) {
		return c.color;
	} else if (c.type == ColorData::Role) {
		return pal.color(c.role);
	}
	return QColor();
}

static BrushData parseBrushValue(const QCss::Value &v, const QPalette &pal)
{
	ColorData c = parseColorValue(v);
	if (c.type == ColorData::Color) {
		return QBrush(c.color);
	} else if (c.type == ColorData::Role) {
		return c.role;
	}

	if (v.type != Value::Function)
		return BrushData();

	QStringList lst = v.variant.toStringList();
	if (lst.count() != 2)
		return BrushData();

	QStringList gradFuncs;
	gradFuncs << QLatin1String("qlineargradient") << QLatin1String("qradialgradient") << QLatin1String("qconicalgradient") << QLatin1String("qgradient");
	int gradType = -1;

	if ((gradType = gradFuncs.indexOf(lst.at(0).toLower())) == -1)
		return BrushData();

	QHash<QString, qreal> vars;
	QVector<QGradientStop> stops;

	int spread = -1;
	QStringList spreads;
	spreads << QLatin1String("pad") << QLatin1String("reflect") << QLatin1String("repeat");

	bool dependsOnThePalette = false;
	Parser parser(lst.at(1));
	while (parser.hasNext()) {
		parser.skipSpace();
		if (!parser.test(IDENT))
			return BrushData();
		QString attr = parser.lexem();
		parser.skipSpace();
		if (!parser.test(COLON))
			return BrushData();
		parser.skipSpace();
		if (attr.compare(QLatin1String("stop"), Qt::CaseInsensitive) == 0) {
			QCss::Value stop, color;
			parser.next();
			if (!parser.parseTerm(&stop)) return BrushData();
			parser.skipSpace();
			parser.next();
			if (!parser.parseTerm(&color)) return BrushData();
			ColorData cd = parseColorValue(color);
			if(cd.type == ColorData::Role)
				dependsOnThePalette = true;
			stops.append(QGradientStop(stop.variant.toReal(), colorFromData(cd, pal)));
		} else {
			parser.next();
			QCss::Value value;
			(void)parser.parseTerm(&value);
			if (attr.compare(QLatin1String("spread"), Qt::CaseInsensitive) == 0) {
				spread = spreads.indexOf(value.variant.toString());
			} else {
				vars[attr] = value.variant.toReal();
			}
		}
		parser.skipSpace();
		(void)parser.test(COMMA);
	}

	if (gradType == 0) {
		QLinearGradient lg(vars.value(QLatin1String("x1")), vars.value(QLatin1String("y1")),
						   vars.value(QLatin1String("x2")), vars.value(QLatin1String("y2")));
		lg.setCoordinateMode(QGradient::ObjectBoundingMode);
		lg.setStops(stops);
		if (spread != -1)
			lg.setSpread(QGradient::Spread(spread));
		BrushData bd = QBrush(lg);
		if (dependsOnThePalette)
			bd.type = BrushData::DependsOnThePalette;
		return bd;
	}

	if (gradType == 1) {
		QRadialGradient rg(vars.value(QLatin1String("cx")), vars.value(QLatin1String("cy")),
						   vars.value(QLatin1String("radius")), vars.value(QLatin1String("fx")),
						   vars.value(QLatin1String("fy")));
		rg.setCoordinateMode(QGradient::ObjectBoundingMode);
		rg.setStops(stops);
		if (spread != -1)
			rg.setSpread(QGradient::Spread(spread));
		BrushData bd = QBrush(rg);
		if (dependsOnThePalette)
			bd.type = BrushData::DependsOnThePalette;
		return bd;
	}

	if (gradType == 2) {
		QConicalGradient cg(vars.value(QLatin1String("cx")), vars.value(QLatin1String("cy")),
							vars.value(QLatin1String("angle")));
		cg.setCoordinateMode(QGradient::ObjectBoundingMode);
		cg.setStops(stops);
		if (spread != -1)
			cg.setSpread(QGradient::Spread(spread));
		BrushData bd = QBrush(cg);
		if (dependsOnThePalette)
			bd.type = BrushData::DependsOnThePalette;
		return bd;
	}

	return BrushData();
}

static QBrush brushFromData(const BrushData& c, const QPalette &pal)
{
	if (c.type == BrushData::Role) {
		return pal.color(c.role);
	} else {
		return c.brush;
	}
}

static BorderStyle parseStyleValue(QCss::Value v)
{
	if (v.type == Value::KnownIdentifier) {
		switch (v.variant.toInt()) {
		case Value_None:
			return BorderStyle_None;
		case Value_Dotted:
			return BorderStyle_Dotted;
		case Value_Dashed:
			return BorderStyle_Dashed;
		case Value_Solid:
			return BorderStyle_Solid;
		case Value_Double:
			return BorderStyle_Double;
		case Value_DotDash:
			return BorderStyle_DotDash;
		case Value_DotDotDash:
			return BorderStyle_DotDotDash;
		case Value_Groove:
			return BorderStyle_Groove;
		case Value_Ridge:
			return BorderStyle_Ridge;
		case Value_Inset:
			return BorderStyle_Inset;
		case Value_Outset:
			return BorderStyle_Outset;
		case Value_Native:
			return BorderStyle_Native;
		default:
			break;
		}
	}

	return BorderStyle_Unknown;
}

void ValueExtractor::borderValue(const Declaration &decl, int *width, QCss::BorderStyle *style, QBrush *color)
{
	if (decl.d->parsed.isValid()) {
		BorderData data = qvariant_cast<BorderData>(decl.d->parsed);
		*width = lengthValueFromData(data.width, f);
		*style = data.style;
		*color = data.color.type != BrushData::Invalid ? brushFromData(data.color, pal) : QBrush(QColor());
		return;
	}

	*width = 0;
	*style = BorderStyle_None;
	*color = QColor();

	if (decl.d->values.isEmpty())
		return;

	BorderData data;
	data.width.number = 0;
	data.width.unit = LengthData::NONE;
	data.style = BorderStyle_None;

	int i = 0;
	if (decl.d->values.at(i).type == Value::Length || decl.d->values.at(i).type == Value::Number) {
		data.width = lengthValue(decl.d->values.at(i));
		*width = lengthValueFromData(data.width, f);
		if (++i >= decl.d->values.count()) {
			decl.d->parsed = QVariant::fromValue<BorderData>(data);
			return;
		}
	}

	data.style = parseStyleValue(decl.d->values.at(i));
	if (data.style != BorderStyle_Unknown) {
		*style = data.style;
		if (++i >= decl.d->values.count()) {
			decl.d->parsed = QVariant::fromValue<BorderData>(data);
			return;
		}
	} else {
		data.style = BorderStyle_None;
	}

	 data.color = parseBrushValue(decl.d->values.at(i), pal);
	 *color = brushFromData(data.color, pal);
	 if (data.color.type != BrushData::DependsOnThePalette)
		 decl.d->parsed = QVariant::fromValue<BorderData>(data);
}

static void parseShorthandBackgroundProperty(const QVector<QCss::Value> &values, BrushData *brush, QString *image, Repeat *repeat, Qt::Alignment *alignment, const QPalette &pal)
{
	*brush = BrushData();
	*image = QString();
	*repeat = Repeat_XY;
	*alignment = Qt::AlignTop | Qt::AlignLeft;

	for (int i = 0; i < values.count(); ++i) {
		const QCss::Value &v = values.at(i);
		if (v.type == Value::Uri) {
			*image = v.variant.toString();
			continue;
		} else if (v.type == Value::KnownIdentifier && v.variant.toInt() == Value_None) {
			*image = QString();
			continue;
		} else if (v.type == Value::KnownIdentifier && v.variant.toInt() == Value_Transparent) {
			*brush = QBrush(Qt::transparent);
		}

		Repeat repeatAttempt = static_cast<Repeat>(findKnownValue(v.variant.toString(),
												   repeats, NumKnownRepeats));
		if (repeatAttempt != Repeat_Unknown) {
			*repeat = repeatAttempt;
			continue;
		}

		if (v.type == Value::KnownIdentifier) {
			const int start = i;
			int count = 1;
			if (i < values.count() - 1
				&& values.at(i + 1).type == Value::KnownIdentifier) {
				++i;
				++count;
			}
			Qt::Alignment a = parseAlignment(values.constData() + start, count);
			if (int(a) != 0) {
				*alignment = a;
				continue;
			}
			i -= count - 1;
		}

		*brush = parseBrushValue(v, pal);
	}
}

bool ValueExtractor::extractBackground(QBrush *brush, QString *image, Repeat *repeat,
									   Qt::Alignment *alignment, Origin *origin, Attachment *attachment,
									   Origin *clip)
{
	bool hit = false;
	for (int i = 0; i < declarations.count(); ++i) {
		const Declaration &decl = declarations.at(i);
		if (decl.d->values.isEmpty())
			continue;
		const QCss::Value &val = decl.d->values.at(0);
		switch (decl.d->propertyId) {
			case BackgroundColor:
					*brush = decl.brushValue();
				break;
			case BackgroundImage:
				if (val.type == Value::Uri)
					*image = val.variant.toString();
				break;
			case BackgroundRepeat:
				if (decl.d->parsed.isValid()) {
					*repeat = static_cast<Repeat>(decl.d->parsed.toInt());
				} else {
					*repeat = static_cast<Repeat>(findKnownValue(val.variant.toString(),
												  repeats, NumKnownRepeats));
					decl.d->parsed = *repeat;
				}
				break;
			case BackgroundPosition:
				*alignment = decl.alignmentValue();
				break;
			case BackgroundOrigin:
				*origin = decl.originValue();
				break;
			case BackgroundClip:
				*clip = decl.originValue();
				break;
			case Background:
				if (decl.d->parsed.isValid()) {
					BackgroundData data = qvariant_cast<BackgroundData>(decl.d->parsed);
					*brush = brushFromData(data.brush, pal);
					*image = data.image;
					*repeat = data.repeat;
					*alignment = data.alignment;
				} else {
					BrushData brushData;
					parseShorthandBackgroundProperty(decl.d->values, &brushData, image, repeat, alignment, pal);
					*brush = brushFromData(brushData, pal);
					if (brushData.type != BrushData::DependsOnThePalette) {
						BackgroundData data = { brushData, *image, *repeat, *alignment };
						decl.d->parsed = QVariant::fromValue<BackgroundData>(data);
					}
				}
				break;
			case BackgroundAttachment:
				*attachment = decl.attachmentValue();
				break;
			default: continue;
		}
		hit = true;
	}
	return hit;
}

static bool setFontSizeFromValue(QCss::Value value, QFont *font, int *fontSizeAdjustment)
{
	if (value.type == Value::KnownIdentifier) {
		bool valid = true;
		switch (value.variant.toInt()) {
			case Value_Small: *fontSizeAdjustment = -1; break;
			case Value_Medium: *fontSizeAdjustment = 0; break;
			case Value_Large: *fontSizeAdjustment = 1; break;
			case Value_XLarge: *fontSizeAdjustment = 2; break;
			case Value_XXLarge: *fontSizeAdjustment = 3; break;
			default: valid = false; break;
		}
		return valid;
	}
	if (value.type != Value::Length)
		return false;

	bool valid = false;
	QString s = value.variant.toString();
	if (s.endsWith(QLatin1String("pt"), Qt::CaseInsensitive)) {
		s.chop(2);
		value.variant = s;
		if (value.variant.convert((QVariant::Type)qMetaTypeId<qreal>())) {
			font->setPointSizeF(value.variant.toReal());
			valid = true;
		}
	} else if (s.endsWith(QLatin1String("px"), Qt::CaseInsensitive)) {
		s.chop(2);
		value.variant = s;
		if (value.variant.convert(QVariant::Int)) {
			font->setPixelSize(value.variant.toInt());
			valid = true;
		}
	}
	return valid;
}

static bool setFontStyleFromValue(const QCss::Value &value, QFont *font)
{
	if (value.type != Value::KnownIdentifier)
		return false ;
	switch (value.variant.toInt()) {
		case Value_Normal: font->setStyle(QFont::StyleNormal); return true;
		case Value_Italic: font->setStyle(QFont::StyleItalic); return true;
		case Value_Oblique: font->setStyle(QFont::StyleOblique); return true;
		default: break;
	}
	return false;
}

static bool setFontWeightFromValue(const QCss::Value &value, QFont *font)
{
	if (value.type == Value::KnownIdentifier) {
		switch (value.variant.toInt()) {
			case Value_Normal: font->setWeight(QFont::Normal); return true;
			case Value_Bold: font->setWeight(QFont::Bold); return true;
			default: break;
		}
		return false;
	}
	if (value.type != Value::Number)
		return false;
	font->setWeight(qMin(value.variant.toInt() / 8, 99));
	return true;
}

/** \internal
 * parse the font family from the values (starting from index \a start)
 * and set it the \a font
 * The function returns \c true if a family was extracted.
 */
static bool setFontFamilyFromValues(const QVector<QCss::Value> &values, QFont *font, int start = 0)
{
	QString family;
	bool shouldAddSpace = false;
	for (int i = start; i < values.count(); ++i) {
		const QCss::Value &v = values.at(i);
		if (v.type == Value::TermOperatorComma) {
			family += QLatin1Char(',');
			shouldAddSpace = false;
			continue;
		}
		const QString str = v.variant.toString();
		if (str.isEmpty())
			break;
		if (shouldAddSpace)
			family += QLatin1Char(' ');
		family += str;
		shouldAddSpace = true;
	}
	if (family.isEmpty())
		return false;
	font->setFamily(family);
	return true;
}

static void setTextDecorationFromValues(const QVector<QCss::Value> &values, QFont *font)
{
	for (int i = 0; i < values.count(); ++i) {
		if (values.at(i).type != Value::KnownIdentifier)
			continue;
		switch (values.at(i).variant.toInt()) {
			case Value_Underline: font->setUnderline(true); break;
			case Value_Overline: font->setOverline(true); break;
			case Value_LineThrough: font->setStrikeOut(true); break;
			case Value_None:
				font->setUnderline(false);
				font->setOverline(false);
				font->setStrikeOut(false);
				break;
			default: break;
		}
	}
}

static void parseShorthandFontProperty(const QVector<QCss::Value> &values, QFont *font, int *fontSizeAdjustment)
{
	font->setStyle(QFont::StyleNormal);
	font->setWeight(QFont::Normal);
	*fontSizeAdjustment = -255;

	int i = 0;
	while (i < values.count()) {
		if (setFontStyleFromValue(values.at(i), font)
			|| setFontWeightFromValue(values.at(i), font))
			++i;
		else
			break;
	}

	if (i < values.count()) {
		setFontSizeFromValue(values.at(i), font, fontSizeAdjustment);
		++i;
	}

	if (i < values.count()) {
		setFontFamilyFromValues(values, font, i);
	}
}

static void setFontVariantFromValue(const QCss::Value &value, QFont *font)
{
	if (value.type == Value::KnownIdentifier) {
		switch (value.variant.toInt()) {
			case Value_Normal: font->setCapitalization(QFont::MixedCase); break;
			case Value_SmallCaps: font->setCapitalization(QFont::SmallCaps); break;
			default: break;
		}
	}
}

static void setTextTransformFromValue(const QCss::Value &value, QFont *font)
{
	if (value.type == Value::KnownIdentifier) {
		switch (value.variant.toInt()) {
			case Value_None: font->setCapitalization(QFont::MixedCase); break;
			case Value_Uppercase: font->setCapitalization(QFont::AllUppercase); break;
			case Value_Lowercase: font->setCapitalization(QFont::AllLowercase); break;
			default: break;
		}
	}
}

bool ValueExtractor::extractFont(QFont *font, int *fontSizeAdjustment)
{
	if (fontExtracted) {
		*font = f;
		*fontSizeAdjustment = adjustment;
		return fontExtracted == 1;
	}

	bool hit = false;
	for (int i = 0; i < declarations.count(); ++i) {
		const Declaration &decl = declarations.at(i);
		if (decl.d->values.isEmpty())
			continue;
		const QCss::Value &val = decl.d->values.at(0);
		switch (decl.d->propertyId) {
			case FontSize: setFontSizeFromValue(val, font, fontSizeAdjustment); break;
			case FontStyle: setFontStyleFromValue(val, font); break;
			case FontWeight: setFontWeightFromValue(val, font); break;
			case FontFamily: setFontFamilyFromValues(decl.d->values, font); break;
			case TextDecoration: setTextDecorationFromValues(decl.d->values, font); break;
			case Font: parseShorthandFontProperty(decl.d->values, font, fontSizeAdjustment); break;
			case FontVariant: setFontVariantFromValue(val, font); break;
			case TextTransform: setTextTransformFromValue(val, font); break;
			default: continue;
		}
		hit = true;
	}

	f = *font;
	adjustment = *fontSizeAdjustment;
	fontExtracted = hit ? 1 : 2;
	return hit;
}

bool ValueExtractor::extractPalette(QBrush *fg, QBrush *sfg, QBrush *sbg, QBrush *abg)
{
	bool hit = false;
	for (int i = 0; i < declarations.count(); ++i) {
		const Declaration &decl = declarations.at(i);
		switch (decl.d->propertyId) {
		case Color: *fg = decl.brushValue(pal); break;
		case QtSelectionForeground: *sfg = decl.brushValue(pal); break;
		case QtSelectionBackground: *sbg = decl.brushValue(pal); break;
		case QtAlternateBackground: *abg = decl.brushValue(pal); break;
		default: continue;
		}
		hit = true;
	}
	return hit;
}

void ValueExtractor::extractFont()
{
	if (fontExtracted)
		return;
	int dummy = -255;
	extractFont(&f, &dummy);
}

bool ValueExtractor::extractImage(QIcon *icon, Qt::Alignment *a, QSize *size)
{
	bool hit = false;
	for (int i = 0; i < declarations.count(); ++i) {
		const Declaration &decl = declarations.at(i);
		switch (decl.d->propertyId) {
		case QtImage:
			*icon = decl.iconValue();
			if (decl.d->values.count() > 0 && decl.d->values.at(0).type == Value::Uri) {
				// try to pull just the size from the image...
				QImageReader imageReader(decl.d->values.at(0).variant.toString());
				if ((*size = imageReader.size()).isNull()) {
					// but we'll have to load the whole image if the
					// format doesn't support just reading the size
					*size = imageReader.read().size();
				}
			}
			break;
		case QtImageAlignment: *a = decl.alignmentValue();  break;
		default: continue;
		}
		hit = true;
	}
	return hit;
}

///////////////////////////////////////////////////////////////////////////////
// Declaration
QColor Declaration::colorValue(const QPalette &pal) const
{
	if (d->values.count() != 1)
		return QColor();

	if (d->parsed.isValid()) {
		if (d->parsed.type() == QVariant::Color)
			return qvariant_cast<QColor>(d->parsed);
		if (d->parsed.type() == QVariant::Int)
			return pal.color((QPalette::ColorRole)(d->parsed.toInt()));
	}

	ColorData color = parseColorValue(d->values.at(0));
	if(color.type == ColorData::Role) {
		d->parsed = QVariant::fromValue<int>(color.role);
		return pal.color((QPalette::ColorRole)(color.role));
	} else {
		d->parsed = QVariant::fromValue<QColor>(color.color);
		return color.color;
	}
}

QBrush Declaration::brushValue(const QPalette &pal) const
{
	if (d->values.count() != 1)
		return QBrush();

	if (d->parsed.isValid()) {
		if (d->parsed.type() == QVariant::Brush)
			return qvariant_cast<QBrush>(d->parsed);
		if (d->parsed.type() == QVariant::Int)
			return pal.color((QPalette::ColorRole)(d->parsed.toInt()));
	}

	BrushData data = parseBrushValue(d->values.at(0), pal);

	if(data.type == BrushData::Role) {
		d->parsed = QVariant::fromValue<int>(data.role);
		return pal.color((QPalette::ColorRole)(data.role));
	} else {
		if (data.type != BrushData::DependsOnThePalette)
			d->parsed = QVariant::fromValue<QBrush>(data.brush);
		return data.brush;
	}
}

void Declaration::brushValues(QBrush *c, const QPalette &pal) const
{
	int needParse = 0x1f; // bits 0..3 say if we should parse the corresponding value.
						  // the bit 4 say we need to update d->parsed
	int i = 0;
	if (d->parsed.isValid()) {
		needParse = 0;
		QList<QVariant> v = d->parsed.toList();
		for (i = 0; i < qMin(v.count(), 4); i++) {
			if (v.at(i).type() == QVariant::Brush) {
				c[i] = qvariant_cast<QBrush>(v.at(i));
			} else if (v.at(i).type() == QVariant::Int) {
				c[i] = pal.color((QPalette::ColorRole)(v.at(i).toInt()));
			} else {
				needParse |= (1<<i);
			}
		}
	}
	if (needParse != 0) {
		QList<QVariant> v;
		for (i = 0; i < qMin(d->values.count(), 4); i++) {
			if (!(needParse & (1<<i)))
				continue;
			BrushData data = parseBrushValue(d->values.at(i), pal);
			if(data.type == BrushData::Role) {
				v += QVariant::fromValue<int>(data.role);
				c[i] = pal.color((QPalette::ColorRole)(data.role));
			} else {
				if (data.type != BrushData::DependsOnThePalette) {
					v += QVariant::fromValue<QBrush>(data.brush);
				} else {
					v += QVariant();
				}
				c[i] = data.brush;
			}
		}
		if (needParse & 0x10)
			d->parsed = v;
	}
	if (i == 0) c[0] = c[1] = c[2] = c[3] = QBrush();
	else if (i == 1) c[3] = c[2] = c[1] = c[0];
	else if (i == 2) c[2] = c[0], c[3] = c[1];
	else if (i == 3) c[3] = c[1];
}

bool Declaration::realValue(qreal *real, const char *unit) const
{
	if (d->values.count() != 1)
		return false;
	const Value &v = d->values.at(0);
	if (unit && v.type != Value::Length)
		return false;
	QString s = v.variant.toString();
	if (unit) {
		if (!s.endsWith(QLatin1String(unit), Qt::CaseInsensitive))
			return false;
		s.chop(qstrlen(unit));
	}
	bool ok = false;
	qreal val = s.toDouble(&ok);
	if (ok)
		*real = val;
	return ok;
}

static bool intValueHelper(const QCss::Value &v, int *i, const char *unit)
{
	if (unit && v.type != Value::Length)
		return false;
	QString s = v.variant.toString();
	if (unit) {
		if (!s.endsWith(QLatin1String(unit), Qt::CaseInsensitive))
			return false;
		s.chop(qstrlen(unit));
	}
	bool ok = false;
	int val = s.toInt(&ok);
	if (ok)
		*i = val;
	return ok;
}

bool Declaration::intValue(int *i, const char *unit) const
{
	if (d->values.count() != 1)
		return false;
	return intValueHelper(d->values.at(0), i, unit);
}

QSize Declaration::sizeValue() const
{
	if (d->parsed.isValid())
		return qvariant_cast<QSize>(d->parsed);

	int x[2] = { 0, 0 };
	if (d->values.count() > 0)
		intValueHelper(d->values.at(0), &x[0], "px");
	if (d->values.count() > 1)
		intValueHelper(d->values.at(1), &x[1], "px");
	else
		x[1] = x[0];
	QSize size(x[0], x[1]);
	d->parsed = QVariant::fromValue<QSize>(size);
	return size;
}

QRect Declaration::rectValue() const
{
	if (d->values.count() != 1)
		return QRect();

	if (d->parsed.isValid())
		return qvariant_cast<QRect>(d->parsed);

	const QCss::Value &v = d->values.at(0);
	if (v.type != Value::Function)
		return QRect();
	QStringList func = v.variant.toStringList();
	if (func.count() != 2 || func.at(0).compare(QLatin1String("rect")) != 0)
		return QRect();
	QStringList args = func[1].split(QLatin1Char(' '), QString::SkipEmptyParts);
	if (args.count() != 4)
		return QRect();
	QRect rect(args[0].toInt(), args[1].toInt(), args[2].toInt(), args[3].toInt());
	d->parsed = QVariant::fromValue<QRect>(rect);
	return rect;
}

void Declaration::colorValues(QColor *c, const QPalette &pal) const
{
	int i;
	if (d->parsed.isValid()) {
		QList<QVariant> v = d->parsed.toList();
		for (i = 0; i < qMin(d->values.count(), 4); i++) {
			if (v.at(i).type() == QVariant::Color) {
				c[i] = qvariant_cast<QColor>(v.at(i));
			} else {
				c[i] = pal.color((QPalette::ColorRole)(v.at(i).toInt()));
			}
		}
	} else {
		QList<QVariant> v;
		for (i = 0; i < qMin(d->values.count(), 4); i++) {
			ColorData color = parseColorValue(d->values.at(i));
			if(color.type == ColorData::Role) {
				v += QVariant::fromValue<int>(color.role);
				c[i] = pal.color((QPalette::ColorRole)(color.role));
			} else {
				v += QVariant::fromValue<QColor>(color.color);
				c[i] = color.color;
			}
		}
		d->parsed = v;
	}

	if (i == 0) c[0] = c[1] = c[2] = c[3] = QColor();
	else if (i == 1) c[3] = c[2] = c[1] = c[0];
	else if (i == 2) c[2] = c[0], c[3] = c[1];
	else if (i == 3) c[3] = c[1];
}

BorderStyle Declaration::styleValue() const
{
	if (d->values.count() != 1)
		return BorderStyle_None;
	return parseStyleValue(d->values.at(0));
}

void Declaration::styleValues(BorderStyle *s) const
{
	int i;
	for (i = 0; i < qMin(d->values.count(), 4); i++)
		s[i] = parseStyleValue(d->values.at(i));
	if (i == 0) s[0] = s[1] = s[2] = s[3] = BorderStyle_None;
	else if (i == 1) s[3] = s[2] = s[1] = s[0];
	else if (i == 2) s[2] = s[0], s[3] = s[1];
	else if (i == 3) s[3] = s[1];
}

Repeat Declaration::repeatValue() const
{
	if (d->parsed.isValid())
		return static_cast<Repeat>(d->parsed.toInt());
	if (d->values.count() != 1)
		return Repeat_Unknown;
	int v = findKnownValue(d->values.at(0).variant.toString(),
				   repeats, NumKnownRepeats);
	d->parsed = v;
	return static_cast<Repeat>(v);
}

Origin Declaration::originValue() const
{
	if (d->parsed.isValid())
		return static_cast<Origin>(d->parsed.toInt());
	if (d->values.count() != 1)
		return Origin_Unknown;
	int v = findKnownValue(d->values.at(0).variant.toString(),
							   origins, NumKnownOrigins);
	d->parsed = v;
	return static_cast<Origin>(v);
}

PositionMode Declaration::positionValue() const
{
	if (d->parsed.isValid())
		return static_cast<PositionMode>(d->parsed.toInt());
	if (d->values.count() != 1)
		return PositionMode_Unknown;
	int v = findKnownValue(d->values.at(0).variant.toString(),
						   positions, NumKnownPositionModes);
	d->parsed = v;
	return static_cast<PositionMode>(v);
}

Attachment Declaration::attachmentValue() const
{
	if (d->parsed.isValid())
		return static_cast<Attachment>(d->parsed.toInt());
	if (d->values.count() != 1)
		return Attachment_Unknown;
	int v = findKnownValue(d->values.at(0).variant.toString(),
						   attachments, NumKnownAttachments);
	d->parsed = v;
	return static_cast<Attachment>(v);
}

int Declaration::styleFeaturesValue() const
{
	Q_ASSERT(d->propertyId == QtStyleFeatures);
	if (d->parsed.isValid())
		return d->parsed.toInt();
	int features = StyleFeature_None;
	for (int i = 0; i < d->values.count(); i++) {
		features |= static_cast<int>(findKnownValue(d->values.value(i).variant.toString(),
									 styleFeatures, NumKnownStyleFeatures));
	}
	d->parsed = features;
	return features;
}

QString Declaration::uriValue() const
{
	if (d->values.isEmpty() || d->values.at(0).type != Value::Uri)
		return QString();
	return d->values.at(0).variant.toString();
}

Qt::Alignment Declaration::alignmentValue() const
{
	if (d->parsed.isValid())
		return Qt::Alignment(d->parsed.toInt());
	if (d->values.isEmpty() || d->values.count() > 2)
		return Qt::AlignLeft | Qt::AlignTop;

	Qt::Alignment v = parseAlignment(d->values.constData(), d->values.count());
	d->parsed = int(v);
	return v;
}

void Declaration::borderImageValue(QString *image, int *cuts,
								   TileMode *h, TileMode *v) const
{
	*image = uriValue();
	for (int i = 0; i < 4; i++)
		cuts[i] = -1;
	*h = *v = TileMode_Stretch;

	if (d->values.count() < 2)
		return;

	if (d->values.at(1).type == Value::Number) { // cuts!
		int i;
		for (i = 0; i < qMin(d->values.count()-1, 4); i++) {
			const Value& v = d->values.at(i+1);
			if (v.type != Value::Number)
				break;
			cuts[i] = v.variant.toString().toInt();
		}
		if (i == 0) cuts[0] = cuts[1] = cuts[2] = cuts[3] = 0;
		else if (i == 1) cuts[3] = cuts[2] = cuts[1] = cuts[0];
		else if (i == 2) cuts[2] = cuts[0], cuts[3] = cuts[1];
		else if (i == 3) cuts[3] = cuts[1];
	}

	if (d->values.last().type == Value::Identifier) {
		*v = static_cast<TileMode>(findKnownValue(d->values.last().variant.toString(),
									  tileModes, NumKnownTileModes));
	}
	if (d->values[d->values.count() - 2].type == Value::Identifier) {
		*h = static_cast<TileMode>
				(findKnownValue(d->values[d->values.count()-2].variant.toString(),
										tileModes, NumKnownTileModes));
	} else
		*h = *v;
}

QIcon Declaration::iconValue() const
{
	if (d->parsed.isValid())
		return qvariant_cast<QIcon>(d->parsed);

	QIcon icon;
	for (int i = 0; i < d->values.count();) {
		const Value &value = d->values.at(i++);
		if (value.type != Value::Uri)
			break;
		QString uri = value.variant.toString();
		QIcon::Mode mode = QIcon::Normal;
		QIcon::State state = QIcon::Off;
		for (int j = 0; j < 2; j++) {
			if (i != d->values.count() && d->values.at(i).type == Value::KnownIdentifier) {
				switch (d->values.at(i).variant.toInt()) {
				case Value_Disabled: mode = QIcon::Disabled; break;
				case Value_Active: mode = QIcon::Active; break;
				case Value_Selected: mode = QIcon::Selected; break;
				case Value_Normal: mode = QIcon::Normal; break;
				case Value_On: state = QIcon::On; break;
				case Value_Off: state = QIcon::Off; break;
				default: break;
				}
				++i;
			} else {
				break;
			}
		}

		// QIcon is soo broken
		if (icon.isNull())
			icon = QIcon(uri);
		else
			icon.addPixmap(uri, mode, state);

		if (i == d->values.count())
			break;

		if (d->values.at(i).type == Value::TermOperatorComma)
			i++;
	}

	d->parsed = QVariant::fromValue<QIcon>(icon);
	return icon;
}

///////////////////////////////////////////////////////////////////////////////
// Selector
int Selector::specificity() const
{
	int val = 0;
	for (int i = 0; i < basicSelectors.count(); ++i) {
		const BasicSelector &sel = basicSelectors.at(i);
		if (!sel.elementName.isEmpty())
			val += 1;

		val += (sel.pseudos.count() + sel.attributeSelectors.count()) * 0x10;
		val += sel.ids.count() * 0x100;
	}
	return val;
}

QString Selector::pseudoElement() const
{
	const BasicSelector& bs = basicSelectors.last();
	if (!bs.pseudos.isEmpty() && bs.pseudos.at(0).type == PseudoClass_Unknown)
		return bs.pseudos.at(0).name;
	return QString();
}

quint64 Selector::pseudoClass(quint64 *negated) const
{
	const BasicSelector& bs = basicSelectors.last();
	if (bs.pseudos.isEmpty())
		return PseudoClass_Unspecified;
	quint64 pc = PseudoClass_Unknown;
	for (int i = !pseudoElement().isEmpty(); i < bs.pseudos.count(); i++) {
		const Pseudo &pseudo = bs.pseudos.at(i);
		if (pseudo.type == PseudoClass_Unknown)
			return PseudoClass_Unknown;
		if (!pseudo.negated)
			pc |= pseudo.type;
		else if (negated)
			*negated |= pseudo.type;
	}
	return pc;
}

///////////////////////////////////////////////////////////////////////////////
// StyleSheet
void StyleSheet::buildIndexes(Qt::CaseSensitivity nameCaseSensitivity)
{
	QVector<StyleRule> universals;
	for (int i = 0; i < styleRules.count(); ++i) {
		const StyleRule &rule = styleRules.at(i);
		QVector<Selector> universalsSelectors;
		for (int j = 0; j < rule.selectors.count(); ++j) {
			const Selector& selector = rule.selectors.at(j);

			if (selector.basicSelectors.isEmpty())
				continue;

			if (selector.basicSelectors.at(0).relationToNext == BasicSelector::NoRelation) {
				if (selector.basicSelectors.count() != 1)
					continue;
			} else if (selector.basicSelectors.count() <= 1) {
				continue;
			}

			const BasicSelector &sel = selector.basicSelectors.at(selector.basicSelectors.count() - 1);

			if (!sel.ids.isEmpty()) {
				StyleRule nr;
				nr.selectors += selector;
				nr.declarations = rule.declarations;
				nr.order = i;
				idIndex.insert(sel.ids.at(0), nr);
			} else if (!sel.elementName.isEmpty()) {
				StyleRule nr;
				nr.selectors += selector;
				nr.declarations = rule.declarations;
				nr.order = i;
				QString name = sel.elementName;
				if (nameCaseSensitivity == Qt::CaseInsensitive)
					name=name.toLower();
				nameIndex.insert(name, nr);
			} else {
				universalsSelectors += selector;
			}
		}
		if (!universalsSelectors.isEmpty()) {
			StyleRule nr;
			nr.selectors = universalsSelectors;
			nr.declarations = rule.declarations;
			nr.order = i;
			universals << nr;
		}
	}
	styleRules = universals;
}

///////////////////////////////////////////////////////////////////////////////
// StyleSelector
StyleSelector::~StyleSelector()
{
}

bool StyleSelector::nodeNameEquals(NodePtr node, const QString& nodeName) const
{
	return nodeNames(node).contains(nodeName, nameCaseSensitivity);
}

QStringList StyleSelector::nodeIds(NodePtr node) const
{
	return QStringList(attribute(node, QLatin1String("id")));
}

bool StyleSelector::selectorMatches(const Selector &selector, NodePtr node)
{
	if (selector.basicSelectors.isEmpty())
		return false;

	if (selector.basicSelectors.at(0).relationToNext == BasicSelector::NoRelation) {
		if (selector.basicSelectors.count() != 1)
			return false;
		return basicSelectorMatches(selector.basicSelectors.at(0), node);
	}
	if (selector.basicSelectors.count() <= 1)
		return false;

	int i = selector.basicSelectors.count() - 1;
	node = duplicateNode(node);
	bool match = true;

	BasicSelector sel = selector.basicSelectors.at(i);
	do {
		match = basicSelectorMatches(sel, node);
		if (!match) {
			if (sel.relationToNext == BasicSelector::MatchNextSelectorIfParent
				|| i == selector.basicSelectors.count() - 1) // first element must always match!
				break;
		}

		if (match || sel.relationToNext != BasicSelector::MatchNextSelectorIfAncestor)
			--i;

		if (i < 0)
			break;

		sel = selector.basicSelectors.at(i);
		if (sel.relationToNext == BasicSelector::MatchNextSelectorIfAncestor
			|| sel.relationToNext == BasicSelector::MatchNextSelectorIfParent) {

			NodePtr nextParent = parentNode(node);
			freeNode(node);
			node = nextParent;
	   } else if (sel.relationToNext == BasicSelector::MatchNextSelectorIfPreceeds) {
			NodePtr previousSibling = previousSiblingNode(node);
			freeNode(node);
			node = previousSibling;
	   }
		if (isNullNode(node)) {
			match = false;
			break;
		}
   } while (i >= 0 && (match || sel.relationToNext == BasicSelector::MatchNextSelectorIfAncestor));

	freeNode(node);

	return match;
}

bool StyleSelector::basicSelectorMatches(const BasicSelector &sel, NodePtr node)
{
	if (!sel.attributeSelectors.isEmpty()) {
		if (!hasAttributes(node))
			return false;

		for (int i = 0; i < sel.attributeSelectors.count(); ++i) {
			const QCss::AttributeSelector &a = sel.attributeSelectors.at(i);

			const QString attrValue = attribute(node, a.name);
			if (attrValue.isNull())
				return false;

			if (a.valueMatchCriterium == QCss::AttributeSelector::MatchContains) {

				QStringList lst = attrValue.split(QLatin1Char(' '));
				if (!lst.contains(a.value))
					return false;
			} else if (
				(a.valueMatchCriterium == QCss::AttributeSelector::MatchEqual
				 && attrValue != a.value)
				||
				(a.valueMatchCriterium == QCss::AttributeSelector::MatchBeginsWith
				 && !attrValue.startsWith(a.value))
			   )
				return false;
		}
	}

	if (!sel.elementName.isEmpty()
		&& !nodeNameEquals(node, sel.elementName))
			return false;

	if (!sel.ids.isEmpty()
		&& sel.ids != nodeIds(node))
			return false;

	return true;
}

void StyleSelector::matchRule(NodePtr node, const StyleRule &rule, StyleSheetOrigin origin,
							   int depth, QMap<uint, StyleRule> *weightedRules)
{
	for (int j = 0; j < rule.selectors.count(); ++j) {
		const Selector& selector = rule.selectors.at(j);
		if (selectorMatches(selector, node)) {
			uint weight = rule.order
						+ selector.specificity() *0x100
						+ (uint(origin) + depth)*0x100000;
			StyleRule newRule = rule;
			if(rule.selectors.count() > 1) {
				newRule.selectors.resize(1);
				newRule.selectors[0] = selector;
			}
			//We might have rules with the same weight if they came from a rule with several selectors
			weightedRules->insertMulti(weight, newRule);
		}
	}
}

// Returns style rules that are in ascending order of specificity
// Each of the StyleRule returned will contain exactly one Selector
QVector<StyleRule> StyleSelector::styleRulesForNode(NodePtr node)
{
	QVector<StyleRule> rules;
	if (styleSheets.isEmpty())
		return rules;

	QMap<uint, StyleRule> weightedRules; // (spec, rule) that will be sorted below

	//prune using indexed stylesheet
	for (int sheetIdx = 0; sheetIdx < styleSheets.count(); ++sheetIdx) {
		const StyleSheet &styleSheet = styleSheets.at(sheetIdx);
		for (int i = 0; i < styleSheet.styleRules.count(); ++i) {
			matchRule(node, styleSheet.styleRules.at(i), styleSheet.origin, styleSheet.depth, &weightedRules);
		}

		if (!styleSheet.idIndex.isEmpty()) {
			QStringList ids = nodeIds(node);
			for (int i = 0; i < ids.count(); i++) {
				const QString &key = ids.at(i);
				QMultiHash<QString, StyleRule>::const_iterator it = styleSheet.idIndex.constFind(key);
				while (it != styleSheet.idIndex.constEnd() && it.key() == key) {
					matchRule(node, it.value(), styleSheet.origin, styleSheet.depth, &weightedRules);
					++it;
				}
			}
		}
		if (!styleSheet.nameIndex.isEmpty()) {
			QStringList names = nodeNames(node);
			for (int i = 0; i < names.count(); i++) {
				QString name = names.at(i);
				if (nameCaseSensitivity == Qt::CaseInsensitive)
					name = name.toLower();
				QMultiHash<QString, StyleRule>::const_iterator it = styleSheet.nameIndex.constFind(name);
				while (it != styleSheet.nameIndex.constEnd() && it.key() == name) {
					matchRule(node, it.value(), styleSheet.origin, styleSheet.depth, &weightedRules);
					++it;
				}
			}
		}
		if (!medium.isEmpty()) {
			for (int i = 0; i < styleSheet.mediaRules.count(); ++i) {
				if (styleSheet.mediaRules.at(i).media.contains(medium, Qt::CaseInsensitive)) {
					for (int j = 0; j < styleSheet.mediaRules.at(i).styleRules.count(); ++j) {
						matchRule(node, styleSheet.mediaRules.at(i).styleRules.at(j), styleSheet.origin,
							   styleSheet.depth, &weightedRules);
					}
				}
			}
		}
	}

	rules.reserve(weightedRules.count());
	QMap<uint, StyleRule>::const_iterator it = weightedRules.constBegin();
	for ( ; it != weightedRules.constEnd() ; ++it)
		rules += *it;

	return rules;
}

// for qtexthtmlparser which requires just the declarations with Enabled state
// and without pseudo elements
QVector<Declaration> StyleSelector::declarationsForNode(NodePtr node, const char *extraPseudo)
{
	QVector<Declaration> decls;
	QVector<StyleRule> rules = styleRulesForNode(node);
	for (int i = 0; i < rules.count(); i++) {
		const Selector& selector = rules.at(i).selectors.at(0);
		const QString pseudoElement = selector.pseudoElement();

		if (extraPseudo && pseudoElement == QLatin1String(extraPseudo)) {
			decls += rules.at(i).declarations;
			continue;
		}

		if (!pseudoElement.isEmpty()) // skip rules with pseudo elements
			continue;
		quint64 pseudoClass = selector.pseudoClass();
		if (pseudoClass == PseudoClass_Enabled || pseudoClass == PseudoClass_Unspecified)
			decls += rules.at(i).declarations;
	}
	return decls;
}

QString Symbol::lexem() const
{
	QString result;
	if (len > 0)
		result.reserve(len);
	for (int i = 0; i < len; ++i) {
		if (text.at(start + i) == QLatin1Char('\\') && i < len - 1)
			++i;
		result += text.at(start + i);
	}
	return result;
}

Parser::Parser(const QString &css, bool isFile)
{
	init(css, isFile);
}

Parser::Parser()
{
	index = 0;
	errorIndex = -1;
	hasEscapeSequences = false;
}

void Parser::init(const QString &css, bool isFile)
{
	QString styleSheet = css;
	if (isFile) {
		QFile file(css);
		if (file.open(QFile::ReadOnly)) {
			sourcePath = QFileInfo(styleSheet).absolutePath() + QLatin1Char('/');
			QTextStream stream(&file);
			styleSheet = stream.readAll();
		} else {
			qWarning() << "QCss::Parser - Failed to load file " << css;
			styleSheet.clear();
		}
	} else {
		sourcePath.clear();
	}

	hasEscapeSequences = false;
	symbols.resize(0);
	symbols.reserve(8);
	Scanner::scan(Scanner::preprocess(styleSheet, &hasEscapeSequences), &symbols);
	index = 0;
	errorIndex = -1;
}

bool Parser::parse(StyleSheet *styleSheet, Qt::CaseSensitivity nameCaseSensitivity)
{
	if (testTokenAndEndsWith(ATKEYWORD_SYM, QLatin1String("charset"))) {
		if (!next(STRING)) return false;
		if (!next(SEMICOLON)) return false;
	}

	while (test(S) || test(CDO) || test(CDC)) {}

	while (testImport()) {
		ImportRule rule;
		if (!parseImport(&rule)) return false;
		styleSheet->importRules.append(rule);
		while (test(S) || test(CDO) || test(CDC)) {}
	}

	do {
		if (testMedia()) {
			MediaRule rule;
			if (!parseMedia(&rule)) return false;
			styleSheet->mediaRules.append(rule);
		} else if (testPage()) {
			PageRule rule;
			if (!parsePage(&rule)) return false;
			styleSheet->pageRules.append(rule);
		} else if (testRuleset()) {
			StyleRule rule;
			if (!parseRuleset(&rule)) return false;
			styleSheet->styleRules.append(rule);
		} else if (test(ATKEYWORD_SYM)) {
			if (!until(RBRACE)) return false;
		} else if (hasNext()) {
			return false;
		}
		while (test(S) || test(CDO) || test(CDC)) {}
	} while (hasNext());
	styleSheet->buildIndexes(nameCaseSensitivity);
	return true;
}

Symbol Parser::errorSymbol()
{
	if (errorIndex == -1) return Symbol();
	return symbols.at(errorIndex);
}

static inline void removeOptionalQuotes(QString *str)
{
	if (!str->startsWith(QLatin1Char('\''))
		&& !str->startsWith(QLatin1Char('\"')))
		return;
	str->remove(0, 1);
	str->chop(1);
}

bool Parser::parseImport(ImportRule *importRule)
{
	skipSpace();

	if (test(STRING)) {
		importRule->href = lexem();
	} else {
		if (!testAndParseUri(&importRule->href)) return false;
	}
	removeOptionalQuotes(&importRule->href);

	skipSpace();

	if (testMedium()) {
		if (!parseMedium(&importRule->media)) return false;

		while (test(COMMA)) {
			skipSpace();
			if (!parseNextMedium(&importRule->media)) return false;
		}
	}

	if (!next(SEMICOLON)) return false;

	skipSpace();
	return true;
}

bool Parser::parseMedia(MediaRule *mediaRule)
{
	do {
		skipSpace();
		if (!parseNextMedium(&mediaRule->media)) return false;
	} while (test(COMMA));

	if (!next(LBRACE)) return false;
	skipSpace();

	while (testRuleset()) {
		StyleRule rule;
		if (!parseRuleset(&rule)) return false;
		mediaRule->styleRules.append(rule);
	}

	if (!next(RBRACE)) return false;
	skipSpace();
	return true;
}

bool Parser::parseMedium(QStringList *media)
{
	media->append(lexem());
	skipSpace();
	return true;
}

bool Parser::parsePage(PageRule *pageRule)
{
	skipSpace();

	if (testPseudoPage())
		if (!parsePseudoPage(&pageRule->selector)) return false;

	skipSpace();
	if (!next(LBRACE)) return false;

	do {
		skipSpace();
		Declaration decl;
		if (!parseNextDeclaration(&decl)) return false;
		if (!decl.isEmpty())
			pageRule->declarations.append(decl);
	} while (test(SEMICOLON));

	if (!next(RBRACE)) return false;
	skipSpace();
	return true;
}

bool Parser::parsePseudoPage(QString *selector)
{
	if (!next(IDENT)) return false;
	*selector = lexem();
	return true;
}

bool Parser::parseNextOperator(Value *value)
{
	if (!hasNext()) return true;
	switch (next()) {
		case SLASH: value->type = Value::TermOperatorSlash; skipSpace(); break;
		case COMMA: value->type = Value::TermOperatorComma; skipSpace(); break;
		default: prev(); break;
	}
	return true;
}

bool Parser::parseCombinator(BasicSelector::Relation *relation)
{
	*relation = BasicSelector::NoRelation;
	if (lookup() == S) {
		*relation = BasicSelector::MatchNextSelectorIfAncestor;
		skipSpace();
	} else {
		prev();
	}
	if (test(PLUS)) {
		*relation = BasicSelector::MatchNextSelectorIfPreceeds;
	} else if (test(GREATER)) {
		*relation = BasicSelector::MatchNextSelectorIfParent;
	}
	skipSpace();
	return true;
}

bool Parser::parseProperty(Declaration *decl)
{
	decl->d->property = lexem();
	decl->d->propertyId = static_cast<Property>(findKnownValue(decl->d->property, properties, NumProperties));
	skipSpace();
	return true;
}

bool Parser::parseRuleset(StyleRule *styleRule)
{
	Selector sel;
	if (!parseSelector(&sel)) return false;
	styleRule->selectors.append(sel);

	while (test(COMMA)) {
		skipSpace();
		Selector sel;
		if (!parseNextSelector(&sel)) return false;
		styleRule->selectors.append(sel);
	}

	skipSpace();
	if (!next(LBRACE)) return false;
	const int declarationStart = index;

	do {
		skipSpace();
		Declaration decl;
		const int rewind = index;
		if (!parseNextDeclaration(&decl)) {
			index = rewind;
			const bool foundSemicolon = until(SEMICOLON);
			const int semicolonIndex = index;

			index = declarationStart;
			const bool foundRBrace = until(RBRACE);

			if (foundSemicolon && semicolonIndex < index) {
				decl = Declaration();
				index = semicolonIndex - 1;
			} else {
				skipSpace();
				return foundRBrace;
			}
		}
		if (!decl.isEmpty())
			styleRule->declarations.append(decl);
	} while (test(SEMICOLON));

	if (!next(RBRACE)) return false;
	skipSpace();
	return true;
}

bool Parser::parseSelector(Selector *sel)
{
	BasicSelector basicSel;
	if (!parseSimpleSelector(&basicSel)) return false;
	while (testCombinator()) {
		if (!parseCombinator(&basicSel.relationToNext)) return false;

		if (!testSimpleSelector()) break;
		sel->basicSelectors.append(basicSel);

		basicSel = BasicSelector();
		if (!parseSimpleSelector(&basicSel)) return false;
	}
	sel->basicSelectors.append(basicSel);
	return true;
}

bool Parser::parseSimpleSelector(BasicSelector *basicSel)
{
	int minCount = 0;
	if (lookupElementName()) {
		if (!parseElementName(&basicSel->elementName)) return false;
	} else {
		prev();
		minCount = 1;
	}
	bool onceMore;
	int count = 0;
	do {
		onceMore = false;
		if (test(HASH)) {
			QString theid = lexem();
			// chop off leading #
			theid.remove(0, 1);
			basicSel->ids.append(theid);
			onceMore = true;
		} else if (testClass()) {
			onceMore = true;
			AttributeSelector a;
			a.name = QLatin1String("class");
			a.valueMatchCriterium = AttributeSelector::MatchContains;
			if (!parseClass(&a.value)) return false;
			basicSel->attributeSelectors.append(a);
		} else if (testAttrib()) {
			onceMore = true;
			AttributeSelector a;
			if (!parseAttrib(&a)) return false;
			basicSel->attributeSelectors.append(a);
		} else if (testPseudo()) {
			onceMore = true;
			Pseudo ps;
			if (!parsePseudo(&ps)) return false;
			basicSel->pseudos.append(ps);
		}
		if (onceMore) ++count;
	} while (onceMore);
	return count >= minCount;
}

bool Parser::parseClass(QString *name)
{
	if (!next(IDENT)) return false;
	*name = lexem();
	return true;
}

bool Parser::parseElementName(QString *name)
{
	switch (lookup()) {
		case STAR: name->clear(); break;
		case IDENT: *name = lexem(); break;
		default: return false;
	}
	return true;
}

bool Parser::parseAttrib(AttributeSelector *attr)
{
	skipSpace();
	if (!next(IDENT)) return false;
	attr->name = lexem();
	skipSpace();

	if (test(EQUAL)) {
		attr->valueMatchCriterium = AttributeSelector::MatchEqual;
	} else if (test(INCLUDES)) {
		attr->valueMatchCriterium = AttributeSelector::MatchContains;
	} else if (test(DASHMATCH)) {
		attr->valueMatchCriterium = AttributeSelector::MatchBeginsWith;
	} else {
		return next(RBRACKET);
	}

	skipSpace();

	if (!test(IDENT) && !test(STRING)) return false;
	attr->value = unquotedLexem();

	skipSpace();
	return next(RBRACKET);
}

bool Parser::parsePseudo(Pseudo *pseudo)
{
	(void)test(COLON);
	pseudo->negated = test(EXCLAMATION_SYM);
	if (test(IDENT)) {
		pseudo->name = lexem();
		pseudo->type = static_cast<quint64>(findKnownValue(pseudo->name, pseudos, NumPseudos));
		return true;
	}
	if (!next(FUNCTION)) return false;
	pseudo->function = lexem();
	// chop off trailing parenthesis
	pseudo->function.chop(1);
	skipSpace();
	if (!test(IDENT)) return false;
	pseudo->name = lexem();
	skipSpace();
	return next(RPAREN);
}

bool Parser::parseNextDeclaration(Declaration *decl)
{
	if (!testProperty())
		return true; // not an error!
	if (!parseProperty(decl)) return false;
	if (!next(COLON)) return false;
	skipSpace();
	if (!parseNextExpr(&decl->d->values)) return false;
	if (testPrio())
		if (!parsePrio(decl)) return false;
	return true;
}

bool Parser::testPrio()
{
	const int rewind = index;
	if (!test(EXCLAMATION_SYM)) return false;
	skipSpace();
	if (!test(IDENT)) {
		index = rewind;
		return false;
	}
	if (lexem().compare(QLatin1String("important"), Qt::CaseInsensitive) != 0) {
		index = rewind;
		return false;
	}
	return true;
}

bool Parser::parsePrio(Declaration *declaration)
{
	declaration->d->important = true;
	skipSpace();
	return true;
}

bool Parser::parseExpr(QVector<Value> *values)
{
	Value val;
	if (!parseTerm(&val)) return false;
	values->append(val);
	bool onceMore;
	do {
		onceMore = false;
		val = Value();
		if (!parseNextOperator(&val)) return false;
		if (val.type != QCss::Value::Unknown)
			values->append(val);
		if (testTerm()) {
			onceMore = true;
			val = Value();
			if (!parseTerm(&val)) return false;
			values->append(val);
		}
	} while (onceMore);
	return true;
}

bool Parser::testTerm()
{
	return test(PLUS) || test(MINUS)
		   || test(NUMBER)
		   || test(PERCENTAGE)
		   || test(LENGTH)
		   || test(STRING)
		   || test(IDENT)
		   || testHexColor()
		   || testFunction();
}

bool Parser::parseTerm(Value *value)
{
	QString str = lexem();
	bool haveUnary = false;
	if (lookup() == PLUS || lookup() == MINUS) {
		haveUnary = true;
		if (!hasNext()) return false;
		next();
		str += lexem();
	}

	value->variant = str;
	value->type = QCss::Value::String;
	switch (lookup()) {
		case NUMBER:
			value->type = Value::Number;
			value->variant.convert(QVariant::Double);
			break;
		case PERCENTAGE:
			value->type = Value::Percentage;
			str.chop(1); // strip off %
			value->variant = str;
			break;
		case LENGTH:
			value->type = Value::Length;
			break;

		case STRING:
			if (haveUnary) return false;
			value->type = Value::String;
			str.chop(1);
			str.remove(0, 1);
			value->variant = str;
			break;
		case IDENT: {
			if (haveUnary) return false;
			value->type = Value::Identifier;
			const int theid = findKnownValue(str, values, NumKnownValues);
			if (theid != 0) {
				value->type = Value::KnownIdentifier;
				value->variant = theid;
			}
			break;
		}
		default: {
			if (haveUnary) return false;
			prev();
			if (testHexColor()) {
				QColor col;
				if (!parseHexColor(&col)) return false;
				value->type = Value::Color;
				value->variant = col;
			} else if (testFunction()) {
				QString name, args;
				if (!parseFunction(&name, &args)) return false;
				if (name == QLatin1String("url")) {
					value->type = Value::Uri;
					removeOptionalQuotes(&args);
					if (QFileInfo(args).isRelative() && !sourcePath.isEmpty()) {
						args.prepend(sourcePath);
					}
					value->variant = args;
				} else {
					value->type = Value::Function;
					value->variant = QStringList() << name << args;
				}
			} else {
				return recordError();
			}
			return true;
		}
	}
	skipSpace();
	return true;
}

bool Parser::parseFunction(QString *name, QString *args)
{
	*name = lexem();
	name->chop(1);
	skipSpace();
	const int start = index;
	if (!until(RPAREN)) return false;
	for (int i = start; i < index - 1; ++i)
		args->append(symbols.at(i).lexem());
	/*
	if (!nextExpr(&arguments)) return false;
	if (!next(RPAREN)) return false;
	*/
	skipSpace();
	return true;
}

bool Parser::parseHexColor(QColor *col)
{
	col->setNamedColor(lexem());
	if (!col->isValid()) {
		qWarning("QCssParser::parseHexColor: Unknown color name '%s'",lexem().toLatin1().constData());
		return false;
	}
	skipSpace();
	return true;
}

bool Parser::testAndParseUri(QString *uri)
{
	const int rewind = index;
	if (!testFunction()) return false;

	QString name, args;
	if (!parseFunction(&name, &args)) {
		index = rewind;
		return false;
	}
	if (name.toLower() != QLatin1String("url")) {
		index = rewind;
		return false;
	}
	*uri = args;
	removeOptionalQuotes(uri);
	return true;
}

bool Parser::testSimpleSelector()
{
	return testElementName()
		   || (test(HASH))
		   || testClass()
		   || testAttrib()
		   || testPseudo();
}

bool Parser::next(QCss::TokenType t)
{
	if (hasNext() && next() == t)
		return true;
	return recordError();
}

bool Parser::test(QCss::TokenType t)
{
	if (index >= symbols.count())
		return false;
	if (symbols.at(index).token == t) {
		++index;
		return true;
	}
	return false;
}

QString Parser::unquotedLexem() const
{
	QString s = lexem();
	if (lookup() == STRING) {
		s.chop(1);
		s.remove(0, 1);
	}
	return s;
}

QString Parser::lexemUntil(QCss::TokenType t)
{
	QString lexem;
	while (hasNext() && next() != t)
		lexem += symbol().lexem();
	return lexem;
}

bool Parser::until(QCss::TokenType target, QCss::TokenType target2)
{
	int braceCount = 0;
	int brackCount = 0;
	int parenCount = 0;
	if (index) {
		switch(symbols.at(index-1).token) {
		case LBRACE: ++braceCount; break;
		case LBRACKET: ++brackCount; break;
		case FUNCTION:
		case LPAREN: ++parenCount; break;
		default: ;
		}
	}
	while (index < symbols.size()) {
		QCss::TokenType t = symbols.at(index++).token;
		switch (t) {
		case LBRACE: ++braceCount; break;
		case RBRACE: --braceCount; break;
		case LBRACKET: ++brackCount; break;
		case RBRACKET: --brackCount; break;
		case FUNCTION:
		case LPAREN: ++parenCount; break;
		case RPAREN: --parenCount; break;
		default: break;
		}
		if ((t == target || (target2 != NONE && t == target2))
			&& braceCount <= 0
			&& brackCount <= 0
			&& parenCount <= 0)
			return true;

		if (braceCount < 0 || brackCount < 0 || parenCount < 0) {
			--index;
			break;
		}
	}
	return false;
}

bool Parser::testTokenAndEndsWith(QCss::TokenType t, QLatin1String str)
{
	if (!test(t)) return false;
	if (!lexem().endsWith(str, Qt::CaseInsensitive)) {
		prev();
		return false;
	}
	return true;
}