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+/*
+ * This file is part of the CSS implementation for KDE.
+ *
+ * Copyright (C) 1999-2003 Lars Knoll ([email protected])
+ * Copyright (C) 2003, 2005, 2006 Apple Computer, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+#ifndef _CSS_cssstyleselector_h_
+#define _CSS_cssstyleselector_h_
+
+#include <qptrlist.h>
+#include <qvaluevector.h>
+
+#include "rendering/render_style.h"
+#include "dom/dom_string.h"
+#include "xml/dom_restyler.h"
+
+class KHTMLSettings;
+class KHTMLView;
+class KHTMLPart;
+class KHTMLFactory;
+class KURL;
+
+namespace DOM {
+    class DocumentImpl;
+    class NodeImpl;
+    class ElementImpl;
+    class StyleSheetImpl;
+    class CSSStyleRuleImpl;
+    class CSSStyleSheetImpl;
+    class CSSSelector;
+    class CSSStyleDeclarationImpl;
+    class CSSProperty;
+    class StyleSheetListImpl;
+    class CSSValueImpl;
+}
+
+namespace khtml
+{
+    class CSSStyleSelectorList;
+    class CSSOrderedRule;
+    class CSSOrderedProperty;
+    class CSSOrderedPropertyList;
+    class RenderStyle;
+
+    /*
+     * to remember the source where a rule came from. Differentiates between
+     * important and not important rules. This is ordered in the order they have to be applied
+     * to the RenderStyle.
+     */
+    enum Source {
+	Default = 0,
+	NonCSSHint = 1,
+	User = 2,
+	Author = 3,
+	Inline = 4,
+	AuthorImportant = 5,
+	InlineImportant = 6,
+	UserImportant =7
+    };
+
+    /**
+     * this class selects a RenderStyle for a given Element based on the
+     * collection of stylesheets it contains. This is just a virtual base class
+     * for specific implementations of the Selector. At the moment only CSSStyleSelector
+     * exists, but someone may wish to implement XSL...
+     */
+    class StyleSelector
+    {
+    public:
+	StyleSelector() {}
+
+	/* as nobody has implemented a second style selector up to now comment out
+	   the virtual methods until then, so the class has no vptr.
+	*/
+// 	virtual ~StyleSelector() {}
+// 	virtual RenderStyle *styleForElement(DOM::ElementImpl *e) = 0;
+
+	enum State {
+	    None = 0x00,
+	    Hover = 0x01,
+	    Focus = 0x02,
+	    Active = 0x04
+	};
+    };
+
+
+    /**
+     * the StyleSelector implementation for CSS.
+     */
+    class CSSStyleSelector : public StyleSelector
+    {
+    public:
+	/**
+	 * creates a new StyleSelector for a Document.
+	 * goes through all StyleSheets defined in the document and
+	 * creates a list of rules it needs to apply to objects
+	 *
+	 * Also takes into account special cases for HTML documents,
+	 * including the defaultStyle (which is html only)
+	 */
+	CSSStyleSelector( DOM::DocumentImpl* doc, QString userStyleSheet, DOM::StyleSheetListImpl *styleSheets, const KURL &url,
+                          bool _strictParsing );
+	/**
+	 * same as above but for a single stylesheet.
+	 */
+	CSSStyleSelector( DOM::CSSStyleSheetImpl *sheet );
+
+	~CSSStyleSelector();
+
+	void addSheet( DOM::CSSStyleSheetImpl *sheet );
+        KDE_EXPORT static void clear();
+        static void reparseConfiguration();
+
+	static void loadDefaultStyle(const KHTMLSettings *s, DOM::DocumentImpl *doc);
+
+	RenderStyle *styleForElement(DOM::ElementImpl *e);
+
+        QValueVector<int> fontSizes() const { return m_fontSizes; }
+	QValueVector<int> fixedFontSizes() const { return m_fixedFontSizes; }
+
+	bool strictParsing;
+	struct Encodedurl {
+	    QString host; //also contains protocol
+	    QString path;
+	    QString file;
+	} encodedurl;
+
+        void computeFontSizes(QPaintDeviceMetrics* paintDeviceMetrics, int zoomFactor);
+	void computeFontSizesFor(QPaintDeviceMetrics* paintDeviceMetrics, int zoomFactor, QValueVector<int>& fontSizes, bool isFixed);
+
+	static void precomputeAttributeDependencies(DOM::DocumentImpl* doc, DOM::CSSSelector* sel);
+    protected:
+	/* checks if the complete selector (which can be build up from a few CSSSelector's
+	    with given relationships matches the given Element */
+	void checkSelector(int selector, DOM::ElementImpl *e);
+	/* checks if the selector matches the given Element */
+	bool checkSimpleSelector(DOM::CSSSelector *selector, DOM::ElementImpl *e, bool isAncestor, bool isSubSelector = false);
+
+        enum SelectorMatch {SelectorMatches = 0, SelectorFailsLocal, SelectorFails};
+        SelectorMatch checkSelector(DOM::CSSSelector *sel, DOM::ElementImpl *e, bool isAncestor, bool isSubSelector = false);
+
+        void addDependency(StructuralDependencyType dependencyType, DOM::ElementImpl* dependency);
+#ifdef APPLE_CHANGES
+	/* This function fixes up the default font size if it detects that the
+	   current generic font family has changed. -dwh */
+	void checkForGenericFamilyChange(RenderStyle* aStyle, RenderStyle* aParentStyle);
+#endif
+
+	/* builds up the selectors and properties lists from the CSSStyleSelectorList's */
+	void buildLists();
+	void clearLists();
+
+        void adjustRenderStyle(RenderStyle* style, DOM::ElementImpl *e);
+
+        unsigned int addInlineDeclarations(DOM::ElementImpl* e, DOM::CSSStyleDeclarationImpl *decl,
+				   unsigned int numProps);
+
+	static DOM::CSSStyleSheetImpl *s_defaultSheet;
+	static DOM::CSSStyleSheetImpl *s_quirksSheet;
+	static CSSStyleSelectorList *s_defaultStyle;
+	static CSSStyleSelectorList *s_defaultQuirksStyle;
+	static CSSStyleSelectorList *s_defaultPrintStyle;
+        static RenderStyle* styleNotYetAvailable;
+
+	CSSStyleSelectorList *defaultStyle;
+	CSSStyleSelectorList *defaultQuirksStyle;
+	CSSStyleSelectorList *defaultPrintStyle;
+
+	CSSStyleSelectorList *authorStyle;
+        CSSStyleSelectorList *userStyle;
+        DOM::CSSStyleSheetImpl *userSheet;
+
+public:
+
+    private:
+        void init(const KHTMLSettings* settings, DOM::DocumentImpl* doc);
+
+        void mapBackgroundAttachment(BackgroundLayer* layer, DOM::CSSValueImpl* value);
+        void mapBackgroundClip(BackgroundLayer* layer, DOM::CSSValueImpl* value);
+        void mapBackgroundOrigin(BackgroundLayer* layer, DOM::CSSValueImpl* value);
+        void mapBackgroundImage(BackgroundLayer* layer, DOM::CSSValueImpl* value);
+        void mapBackgroundRepeat(BackgroundLayer* layer, DOM::CSSValueImpl* value);
+        void mapBackgroundSize(BackgroundLayer* layer, DOM::CSSValueImpl* value);
+        void mapBackgroundXPosition(BackgroundLayer* layer, DOM::CSSValueImpl* value);
+        void mapBackgroundYPosition(BackgroundLayer* layer, DOM::CSSValueImpl* value);
+
+    public: // we need to make the enum public for SelectorCache
+	enum SelectorState {
+	    Unknown = 0,
+	    Applies,
+	    AppliesPseudo,
+	    Invalid
+	};
+
+        enum SelectorMedia {
+            MediaAural = 1,
+            MediaBraille,
+            MediaEmboss,
+            MediaHandheld,
+            MediaPrint,
+            MediaProjection,
+            MediaScreen,
+            MediaTTY,
+            MediaTV
+        };
+    protected:
+
+        struct SelectorCache {
+            SelectorState state;
+            unsigned int props_size;
+            int *props;
+        };
+
+	unsigned int selectors_size;
+	DOM::CSSSelector **selectors;
+	SelectorCache *selectorCache;
+	unsigned int properties_size;
+	CSSOrderedProperty **properties;
+	QMemArray<CSSOrderedProperty> inlineProps;
+        QString m_medium;
+	CSSOrderedProperty **propsToApply;
+	CSSOrderedProperty **pseudoProps;
+	unsigned int propsToApplySize;
+	unsigned int pseudoPropsSize;
+
+
+	RenderStyle::PseudoId dynamicPseudo;
+
+	RenderStyle *style;
+	RenderStyle *parentStyle;
+	DOM::ElementImpl *element;
+	DOM::NodeImpl *parentNode;
+	KHTMLView *view;
+	KHTMLPart *part;
+	const KHTMLSettings *settings;
+	QPaintDeviceMetrics *paintDeviceMetrics;
+        QValueVector<int>     m_fontSizes;
+	QValueVector<int>     m_fixedFontSizes;
+
+	bool fontDirty;
+
+	void applyRule(int id, DOM::CSSValueImpl *value);
+    };
+
+    /*
+     * List of properties that get applied to the Element. We need to collect them first
+     * and then apply them one by one, because we have to change the apply order.
+     * Some properties depend on other one already being applied (for example all properties specifying
+     * some length need to have already the correct font size. Same applies to color
+     *
+     * While sorting them, we have to take care not to mix up the original order.
+     */
+    class CSSOrderedProperty
+    {
+    public:
+	CSSOrderedProperty(DOM::CSSProperty *_prop, uint _selector,
+			   bool first, Source source, unsigned int specificity,
+			   unsigned int _position )
+	    : prop ( _prop ), pseudoId( RenderStyle::NOPSEUDO ), selector( _selector ),
+	      position( _position )
+	{
+	    priority = (!first << 30) | (source << 24) | specificity;
+	}
+
+	bool operator < ( const CSSOrderedProperty &other ) const {
+             if (priority < other.priority) return true;
+             if (priority > other.priority) return false;
+             if (position < other.position) return true;
+             return false;
+	}
+
+	DOM::CSSProperty *prop;
+	RenderStyle::PseudoId pseudoId;
+	unsigned int selector;
+	unsigned int position;
+
+	Q_UINT32 priority;
+    };
+
+    /*
+     * This is the list we will collect all properties we need to apply in.
+     * It will get sorted once before applying.
+     */
+    class CSSOrderedPropertyList : public QPtrList<CSSOrderedProperty>
+    {
+    public:
+	virtual int compareItems(QPtrCollection::Item i1, QPtrCollection::Item i2);
+	void append(DOM::CSSStyleDeclarationImpl *decl, uint selector, uint specificity,
+		    Source regular, Source important );
+    };
+
+    class CSSOrderedRule
+    {
+    public:
+	CSSOrderedRule(DOM::CSSStyleRuleImpl *r, DOM::CSSSelector *s, int _index);
+	~CSSOrderedRule();
+
+	DOM::CSSSelector *selector;
+	DOM::CSSStyleRuleImpl *rule;
+	int index;
+    };
+
+    class CSSStyleSelectorList : public QPtrList<CSSOrderedRule>
+    {
+    public:
+	CSSStyleSelectorList();
+	virtual ~CSSStyleSelectorList();
+
+	void append( DOM::CSSStyleSheetImpl *sheet,
+		     const DOM::DOMString &medium = "screen" );
+
+	void collect( QPtrList<DOM::CSSSelector> *selectorList, CSSOrderedPropertyList *propList,
+		      Source regular, Source important );
+    };
+
+}
+#endif