CSS Support

- Very initial support of CSS stylesheets in the SVG via including the
ExCss and Fizzler libraries
- Bug fixes with path rendering
- Improvements to the API for loading an SVG file

Source/External/ExCSS/Model/Rules/GenericRule.cs

+// ReSharper disable once CheckNamespace
+namespace ExCSS
+{
+    public class GenericRule : AggregateRule
+    {
+        private string _text;
+        private bool _stopped;
+
+        internal void SetInstruction(string text)
+        {
+            _text = text;
+            _stopped = true;
+        }
+
+        internal void SetCondition(string text)
+        {
+            _text = text;
+            _stopped = false;
+        }
+
+        public override string ToString()
+        {
+            return ToString(false);
+        }
+
+        public override string ToString(bool friendlyFormat, int indentation = 0)
+        {
+            if (_stopped)
+            {
+                return _text + ";";
+            }
+
+            return _text + "{" + RuleSets + "}";
+        }
+    }
+}

Source/External/ExCSS/Model/Rules/IRuleContainer.cs

+using System.Collections.Generic;
+
+// ReSharper disable once CheckNamespace
+namespace ExCSS
+{
+    public interface IRuleContainer
+    {
+        List<RuleSet> Declarations { get; }
+    }
+}
\ No newline at end of file

Source/External/ExCSS/Model/Rules/ImportRule.cs

+using ExCSS.Model;
+using ExCSS.Model.Extensions;
+
+// ReSharper disable once CheckNamespace
+namespace ExCSS
+{
+    public class ImportRule : RuleSet, ISupportsMedia
+    {
+        private string _href;
+        private readonly MediaTypeList _media;
+
+        public ImportRule() 
+        {
+            _media = new MediaTypeList();
+            RuleType = RuleType.Import;
+        }
+      
+        public string Href
+        {
+            get { return _href; }
+            set { _href = value; }
+        }
+
+        public MediaTypeList Media
+        {
+            get { return _media; }
+        }
+
+        public override string ToString()
+        {
+            return ToString(false);
+        }
+
+        public override string ToString(bool friendlyFormat, int indentation = 0)
+        {
+            return _media.Count > 0
+                ? string.Format("@import url({0}) {1};", _href, _media).NewLineIndent(friendlyFormat, indentation)
+                : string.Format("@import url({0});", _href).NewLineIndent(friendlyFormat, indentation);
+        }
+    }
+}

Source/External/ExCSS/Model/Rules/KeyframeRule.cs

+using ExCSS.Model;
+using ExCSS.Model.Extensions;
+
+// ReSharper disable once CheckNamespace
+namespace ExCSS
+{
+    public class KeyframeRule : RuleSet, ISupportsDeclarations
+    {
+        private string _value;
+
+        public KeyframeRule()
+        {
+            Declarations = new StyleDeclaration();
+            RuleType = RuleType.Keyframe;
+        }
+
+        public string Value
+        {
+            get { return _value; }
+            set { _value = value; }
+        }
+
+        public StyleDeclaration Declarations { get; private set; }
+
+        public override string ToString()
+        {
+            return ToString(false);
+        }
+
+        public override string ToString(bool friendlyFormat, int indentation = 0)
+        {
+            return string.Empty.Indent(friendlyFormat, indentation) +
+                _value + 
+                "{" + 
+                Declarations.ToString(friendlyFormat, indentation) +
+                "}".NewLineIndent(friendlyFormat, indentation);
+        }
+    }
+}

Source/External/ExCSS/Model/Rules/KeyframesRule.cs

+using System;
+using System.Collections.Generic;
+using System.Linq;
+using ExCSS.Model.Extensions;
+
+// ReSharper disable once CheckNamespace
+namespace ExCSS
+{
+    public class KeyframesRule : RuleSet, IRuleContainer
+    {
+        private readonly List<RuleSet> _ruleSets;
+        private string _identifier;
+
+        public KeyframesRule() 
+        {
+            _ruleSets = new List<RuleSet>();
+            RuleType = RuleType.Keyframes;
+        }
+       
+        public string Identifier
+        {
+            get { return _identifier; }
+            set { _identifier = value; }
+        }
+
+        //TODO change to "keyframes"
+        public List<RuleSet> Declarations
+        {
+            get { return _ruleSets; }
+        }
+
+        public override string ToString()
+        {
+            return ToString(false);
+        }
+
+        public override string ToString(bool friendlyFormat, int indentation = 0)
+        {
+            var join = friendlyFormat ? "".NewLineIndent(true, indentation) : "";
+
+            var declarationList = _ruleSets.Select(d => d.ToString(friendlyFormat, indentation + 1));
+            var declarations = string.Join(join, declarationList.ToArray());
+
+            return ("@keyframes " + _identifier + "{").NewLineIndent(friendlyFormat, indentation) +
+                declarations.NewLineIndent(friendlyFormat, indentation) +
+                "}".NewLineIndent(friendlyFormat, indentation);
+        }
+    }
+}

Source/External/ExCSS/Model/Rules/MediaRule.cs

+using System;
+using System.Linq;
+using ExCSS.Model;
+using ExCSS.Model.Extensions;
+
+// ReSharper disable once CheckNamespace
+namespace ExCSS
+{
+    public class MediaRule : ConditionalRule, ISupportsMedia
+    {
+        private readonly MediaTypeList _media;
+
+        public MediaRule() 
+        {
+            _media = new MediaTypeList();
+            RuleType = RuleType.Media;
+        }
+
+        public override string Condition
+        {
+            get { return _media.MediaType; }
+            set { _media.MediaType = value; }
+        }
+
+        public MediaTypeList Media
+        {
+            get { return _media; }
+        }
+
+        public override string ToString()
+        {
+            return ToString(false);
+        }
+
+        public override string ToString(bool friendlyFormat, int indentation = 0)
+        {
+            var join = friendlyFormat ? "".NewLineIndent(true, indentation + 1) : "";
+
+            var declarationList = RuleSets.Select(d => d.ToString(friendlyFormat, indentation + 1).TrimFirstLine());
+            var declarations = string.Join(join, declarationList.ToArray());
+
+            return ("@media " + _media.MediaType + "{").NewLineIndent(friendlyFormat, indentation) +
+                declarations.TrimFirstLine().NewLineIndent(friendlyFormat, indentation + 1) +
+                "}".NewLineIndent(friendlyFormat, indentation);
+        }
+    }
+}

Source/External/ExCSS/Model/Rules/NamespaceRule.cs

+using ExCSS.Model.Extensions;
+// ReSharper disable once CheckNamespace
+
+
+namespace ExCSS
+{
+    public class NamespaceRule : RuleSet
+    {
+        public NamespaceRule() 
+        {
+            RuleType = RuleType.Namespace;
+        }
+
+        public string Uri { get; set; }
+
+        public string Prefix { get; set; }
+
+        public override string ToString()
+        {
+            return ToString(false);
+        }
+
+        public override string ToString(bool friendlyFormat, int indentation = 0)
+        {
+            return string.IsNullOrEmpty(Prefix)
+                 ? string.Format("@namespace '{0}';", Uri).NewLineIndent(friendlyFormat, indentation)
+                 : string.Format("@namespace {0} '{1}';", Prefix, Uri).NewLineIndent(friendlyFormat, indentation);
+        }
+    }
+}

Source/External/ExCSS/Model/Rules/PageRule.cs

+using ExCSS.Model;
+using ExCSS.Model.Extensions;
+
+// ReSharper disable once CheckNamespace
+namespace ExCSS
+{
+    public class PageRule : RuleSet, ISupportsSelector, ISupportsDeclarations
+    {
+        private readonly StyleDeclaration _declarations;
+        private BaseSelector _selector;
+        private string _selectorText;
+
+        public PageRule() 
+        {
+            _declarations = new StyleDeclaration();
+            RuleType = RuleType.Page;
+        }
+
+        internal PageRule AppendRule(Property rule)
+        {
+            _declarations.Properties.Add(rule);
+            return this;
+        }
+
+        public BaseSelector Selector
+        {
+            get { return _selector; }
+            set
+            {
+                _selector = value;
+                _selectorText = value.ToString();
+            }
+        }
+
+        public StyleDeclaration Declarations
+        {
+            get { return _declarations; }
+        }
+
+        public override string ToString()
+        {
+            return ToString(false);
+        }
+
+        public override string ToString(bool friendlyFormat, int indentation = 0)
+        {
+            var pseudo = string.IsNullOrEmpty(_selectorText)
+                             ? ""
+                             : ":" + _selectorText;
+
+            var declarations = _declarations.ToString(friendlyFormat, indentation);//.TrimFirstLine();
+
+            return ("@page " + pseudo + "{").NewLineIndent(friendlyFormat, indentation) +
+                declarations +
+                "}".NewLineIndent(friendlyFormat, indentation);
+        }
+    }
+}

Source/External/ExCSS/Model/Rules/RuleSet.cs

+
+// ReSharper disable once CheckNamespace
+namespace ExCSS
+{
+    public abstract class RuleSet
+    {
+        internal RuleSet()
+        {
+            RuleType = RuleType.Unknown;
+        }
+
+        public RuleType RuleType { get; set; }
+
+        public abstract string ToString(bool friendlyFormat, int indentation = 0);
+    }
+}

Source/External/ExCSS/Model/Rules/StyleDeclaration.cs

+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Text;
+
+// ReSharper disable once CheckNamespace
+namespace ExCSS
+{
+    public class StyleDeclaration : IList<Property>
+    {
+        private readonly List<Property> _properties;
+        private readonly Func<string> _getter;
+        private readonly Action<string> _setter;
+        private bool _blocking;
+
+        public StyleDeclaration()
+        {
+            var text = string.Empty;
+            _getter = () => text;
+            _setter = value => text = value;
+            _properties = new List<Property>();
+        }
+
+        public string Value
+        {
+            get { return _getter(); }
+            set
+            {
+                Update(value);
+                _setter(value);
+            }
+        }
+
+        public RuleSet ParentRule { get; set; }
+
+        public void Add(Property item)
+        {
+            _properties.Add(item);
+        }
+
+        public void Clear()
+        {
+            _properties.Clear();
+        }
+
+        public bool Contains(Property item)
+        {
+            return _properties.Contains(item);
+        }
+
+        public void CopyTo(Property[] array, int arrayIndex)
+        {
+            _properties.CopyTo(array, arrayIndex);
+        }
+
+        public bool Remove(Property item)
+        {
+            return _properties.Remove(item);
+        }
+
+        public int IndexOf(Property item)
+        {
+            return _properties.IndexOf(item);
+        }
+
+        public void Insert(int index, Property item)
+        {
+            _properties.Insert(index, item);
+        }
+
+        public void RemoveAt(int index)
+        {
+            _properties.RemoveAt(index);
+        }
+
+        public override string ToString()
+        {
+            return ToString(false);
+        }
+
+        public string ToString(bool friendlyFormat, int indentation = 0)
+        { 
+            var builder = new StringBuilder();
+
+            foreach (var property in _properties)
+            {
+                if (friendlyFormat)
+                {
+                    builder.Append(Environment.NewLine);
+                }
+
+                builder.Append(property.ToString(friendlyFormat, indentation+1)).Append(';');
+            }
+
+            return builder.ToString();
+        }
+
+        internal string RemoveProperty(string propertyName)
+        {
+            for (var i = 0; i < _properties.Count; i++)
+            {
+                if (!_properties[i].Name.Equals(propertyName))
+                {
+                    continue;
+                }
+
+                var value = _properties[i].Term;
+
+                _properties.RemoveAt(i);
+                Propagate();
+
+                return value.ToString();
+            }
+
+            return null;
+        }
+
+        internal string GetPropertyValue(string propertyName)
+        {
+            for (var i = 0; i < _properties.Count; i++)
+            {
+                if (_properties[i].Name.Equals(propertyName))
+                {
+                    return _properties[i].Term.ToString();
+                }
+            }
+
+            return null;
+        }
+
+        public IEnumerator<Property> GetEnumerator()
+        {
+            return _properties.GetEnumerator();
+        }
+
+        public Property this[int index]
+        {
+            get { return _properties[index]; }
+            set { _properties[index] = value; }
+        }
+
+        public List<Property> Properties
+        {
+            get { return _properties; }
+        }
+
+        public int Count { get { return _properties.Count; } }
+
+        public bool IsReadOnly { get { return false; } }
+
+        internal StyleDeclaration SetProperty(string propertyName, string propertyValue)
+        {
+            //_properties.Add(Parser.ParseDeclaration(propertyName + ":" + propertyValue));
+            //TODO
+            Propagate();
+            return this;
+        }
+
+        internal void Update(string value)
+        {
+            if (_blocking)
+            {
+                return;
+            }
+
+            var rules = Parser.ParseDeclarations(value ?? string.Empty).Properties;
+
+            _properties.Clear();
+            _properties.AddRange(rules);
+        }
+
+        IEnumerator IEnumerable.GetEnumerator()
+        {
+            return ((IEnumerable)_properties).GetEnumerator();
+        }
+
+        private void Propagate()
+        {
+            _blocking = true;
+            _setter(ToString());
+            _blocking = false;
+        }
+    }
+}
\ No newline at end of file

Source/External/ExCSS/Model/Rules/StyleRule.cs

+using System;
+using ExCSS.Model;
+using ExCSS.Model.Extensions;
+
+// ReSharper disable once CheckNamespace
+namespace ExCSS
+{
+    public class StyleRule : RuleSet, ISupportsSelector, ISupportsDeclarations
+    {
+        private string _value;
+        private BaseSelector _selector;
+        private readonly StyleDeclaration _declarations;
+
+        public StyleRule() : this( new StyleDeclaration())
+        {}
+
+        public StyleRule(StyleDeclaration declarations) 
+        {
+            RuleType = RuleType.Style;
+            _declarations = declarations;
+        }
+
+        public BaseSelector Selector
+        {
+            get { return _selector; }
+            set
+            {
+                _selector = value;
+                _value = value.ToString();
+            }
+        }
+
+        public string Value
+        {
+            get { return _value; }
+            set
+            {
+                _selector = Parser.ParseSelector(value);
+                _value = value;
+            }
+        }
+
+        public StyleDeclaration Declarations
+        {
+            get { return _declarations; }
+        }
+
+        public override string ToString()
+        {
+            return ToString(false);
+        }
+
+        public override string ToString(bool friendlyFormat, int indentation = 0)
+        {
+            return _value.NewLineIndent(friendlyFormat, indentation) +
+                "{" +
+                _declarations.ToString(friendlyFormat, indentation) +
+                "}".NewLineIndent(friendlyFormat, indentation);
+        }
+    }
+}

Source/External/ExCSS/Model/Rules/SupportsRule.cs

+using System.Linq;
+using ExCSS.Model.Extensions;
+
+// ReSharper disable once CheckNamespace
+namespace ExCSS
+{
+    public class SupportsRule : ConditionalRule
+    {
+        private string _condition;
+
+        public SupportsRule()
+        {
+            RuleType = RuleType.Supports;
+            _condition = string.Empty;
+        }
+
+        public override string Condition
+        {
+            get { return _condition; }
+            set { _condition = value; }
+        }
+
+        public bool IsSupported{ get; set; }
+
+        public override string ToString()
+        {
+            return ToString(false);
+        }
+
+        public override string ToString(bool friendlyFormat, int indentation = 0)
+        {
+            var join = friendlyFormat ? "".NewLineIndent(true, indentation + 1) : "";
+
+            var declarationList = RuleSets.Select(d => d.ToString(friendlyFormat, indentation + 1).TrimFirstLine());
+            var declarations = string.Join(join, declarationList.ToArray());
+
+            return ("@supports" + _condition + "{").NewLineIndent(friendlyFormat, indentation) +
+                declarations.TrimFirstLine().NewLineIndent(friendlyFormat, indentation + 1) +
+                "}".NewLineIndent(friendlyFormat, indentation);
+        }
+    }
+}

Source/External/ExCSS/Model/Selector/AggregateSelectorList.cs

+using System;
+using System.Text;
+
+// ReSharper disable once CheckNamespace
+namespace ExCSS
+{
+    public class AggregateSelectorList : SelectorList
+    {
+        public readonly string Delimiter;
+
+        public AggregateSelectorList(string delimiter)
+        {
+            if (delimiter.Length > 1)
+            {
+                throw new ArgumentException("Expected single character delimiter or empty string", "delimiter");
+            }
+            
+            Delimiter = delimiter;
+        }
+
+        public override string ToString(bool friendlyFormat, int indentation = 0)
+        {
+            var builder = new StringBuilder();
+
+            foreach (var selector in Selectors)
+            {
+                builder.Append(selector.ToString(friendlyFormat, indentation + 1));                    
+                builder.Append(Delimiter);
+            }
+           
+            if (Delimiter.Length <= 0)
+            {
+                return builder.ToString();
+            }
+           
+            if (builder.Length > 0)
+            {
+                builder.Remove(builder.Length - 1, 1);
+            }
+
+            return builder.ToString();
+        }
+    }
+}

Source/External/ExCSS/Model/Selector/BaseSelector.cs

+
+// ReSharper disable once CheckNamespace
+namespace ExCSS
+{
+    public abstract class BaseSelector
+    {
+        public sealed override string ToString()
+        {
+            return ToString(false);
+        }
+
+        public abstract string ToString(bool friendlyFormat, int indentation = 0);
+    }
+}
+

Source/External/ExCSS/Model/Selector/CombinatorSelector.cs

+using System;
+using ExCSS.Model;
+
+// ReSharper disable once CheckNamespace
+namespace ExCSS
+{
+    public struct CombinatorSelector
+    {
+        public BaseSelector Selector;
+        public Combinator Delimiter;
+
+        public CombinatorSelector(BaseSelector selector, Combinator delimiter)
+        {
+            Selector = selector;
+            Delimiter = delimiter;
+        }
+
+        public char Character
+        {
+            get{
+                switch (Delimiter)
+                {
+                    case Combinator.Child:
+                        return Specification.GreaterThan;
+
+                    case Combinator.AdjacentSibling:
+                        return Specification.PlusSign;
+
+                    case Combinator.Descendent:
+                        return Specification.Space;
+
+                    case Combinator.Sibling:
+                        return Specification.Tilde;
+
+                    case Combinator.Namespace:
+                        return Specification.Pipe;
+
+                    default:
+                        throw new NotImplementedException("Unknown combinator: " + Delimiter);
+                }
+            }
+        }
+    }
+}
+

Source/External/ExCSS/Model/Selector/ComplexSelector.cs

+using System;
+using System.Text;
+using System.Collections.Generic;
+using System.Collections;
+
+// ReSharper disable once CheckNamespace
+namespace ExCSS
+{
+    public class ComplexSelector : BaseSelector, IEnumerable<CombinatorSelector>
+    {
+        private readonly List<CombinatorSelector> _selectors;
+
+        public ComplexSelector()
+        {
+            _selectors = new List<CombinatorSelector>();
+        }
+
+        public ComplexSelector AppendSelector(BaseSelector selector, Combinator combinator)
+        {
+            _selectors.Add(new CombinatorSelector(selector, combinator));
+            return this;
+        }
+
+        public IEnumerator<CombinatorSelector> GetEnumerator()
+        {
+            return _selectors.GetEnumerator();
+        }
+       
+        internal void ConcludeSelector(BaseSelector selector)
+        {
+            _selectors.Add(new CombinatorSelector { Selector = selector });
+        }
+
+        public int Length
+        {
+            get { return _selectors.Count; }
+        }
+
+        IEnumerator IEnumerable.GetEnumerator()
+        {
+            return ((IEnumerable)_selectors).GetEnumerator();
+        }
+
+        public override string ToString(bool friendlyFormat, int indentation = 0)
+        {
+            var builder = new StringBuilder();
+
+            if (_selectors.Count <= 0)
+            {
+                return builder.ToString();
+            }
+
+            var n = _selectors.Count - 1;
+
+            for (var i = 0; i < n; i++)
+            {
+                builder.Append(_selectors[i].Selector);
+                builder.Append(_selectors[i].Character);
+            }
+
+            builder.Append(_selectors[n].Selector);
+
+            return builder.ToString();
+        }
+    }
+}

Source/External/ExCSS/Model/Selector/FirstChildSelector.cs

+// ReSharper disable once CheckNamespace
+namespace ExCSS
+{
+    internal sealed class FirstChildSelector : BaseSelector, IToString
+    {
+        FirstChildSelector()
+        { }
+
+        static FirstChildSelector _instance;
+
+        public static FirstChildSelector Instance
+        {
+            get { return _instance ?? (_instance = new FirstChildSelector()); }
+        }
+
+        public override string ToString(bool friendlyFormat, int indentation = 0)
+        {
+            return ":" + PseudoSelectorPrefix.PseudoFirstchild;
+        }
+    }
+}
\ No newline at end of file

Source/External/ExCSS/Model/Selector/LastChildSelector.cs

+// ReSharper disable once CheckNamespace
+namespace ExCSS
+{
+    internal sealed class LastChildSelector : BaseSelector, IToString
+    {
+        LastChildSelector()
+        { }
+
+        static LastChildSelector _instance;
+
+        public static LastChildSelector Instance
+        {
+            get { return _instance ?? (_instance = new LastChildSelector()); }
+        }
+
+        public override string ToString(bool friendlyFormat, int indentation = 0)
+        {
+            return ":" + PseudoSelectorPrefix.PseudoLastchild;
+        }
+    }
+}
\ No newline at end of file

Source/External/ExCSS/Model/Selector/MultipleSelectorList.cs

+using System.Text;
+
+// ReSharper disable once CheckNamespace
+namespace ExCSS
+{
+    public class MultipleSelectorList : SelectorList, IToString
+    {
+        internal static MultipleSelectorList Create(params SimpleSelector[] selectors)
+        {
+            var multiple = new MultipleSelectorList();
+
+            foreach (var selector in selectors)
+            {
+                multiple.Selectors.Add(selector);
+            }
+
+            return multiple;
+        }
+
+        internal bool IsInvalid { get; set; }
+
+        public override string ToString(bool friendlyFormat, int indentation = 0)
+        {
+            var builder = new StringBuilder();
+
+            if (Selectors.Count <= 0)
+            {
+                return builder.ToString();
+            }
+
+            builder.Append(Selectors[0]);
+
+            for (var i = 1; i < Selectors.Count; i++)
+            {
+                builder.Append(',').Append(Selectors[i]);
+            }
+
+            return builder.ToString();
+        }
+    }
+}

Source/External/ExCSS/Model/Selector/NthChildSelector.cs

+
+// ReSharper disable once CheckNamespace
+namespace ExCSS
+{
+    internal abstract class NthChildSelector : BaseSelector, IToString
+    {
+        public int Step;
+        public int Offset;
+        internal string FunctionText { get; set; }
+
+        internal string FormatSelector(string functionName)
+        {
+            var format = Offset < 0
+                ? ":{0}({1}n{2})"
+                : ":{0}({1}n+{2})";
+
+            return string.IsNullOrEmpty(FunctionText)
+                ? string.Format(format, functionName, Step, Offset)
+                : string.Format(":{0}({1})", functionName, FunctionText);
+        }
+
+        public abstract override string ToString(bool friendlyFormat, int indentation = 0);
+    }
+}
\ No newline at end of file