/// <summary>
/// Computes the declarations for the given element in the context of
/// the specified styling rules.
/// </summary>
/// <param name="rules">The styles to use.</param>
/// <param name="element">The element that is questioned.</param>
/// <param name="pseudoSelector">The optional pseudo selector to use.</param>
/// <returns>The style declaration containing all the declarations.</returns>
public static CssStyleDeclaration ComputeDeclarations(this StyleCollection rules, IElement element, String pseudoSelector = null)
{
var computedStyle = new CssStyleDeclaration();
var pseudoElement = PseudoElement.Create(element, pseudoSelector);
if (pseudoElement != null)
{
element = pseudoElement;
}
computedStyle.SetDeclarations(rules.ComputeCascadedStyle(element).Declarations);
var htmlElement = element as IHtmlElement;
if (htmlElement != null)
{
var declarations = htmlElement.Style.OfType<CssProperty>();
computedStyle.SetDeclarations(declarations);
}
var nodes = element.GetAncestors().OfType<IElement>();
foreach (var node in nodes)
{
var style = rules.ComputeCascadedStyle(node);
computedStyle.UpdateDeclarations(style.Declarations);
}
return computedStyle;
}
internal static CssStyleDeclaration ParseDeclarations(String declarations)
{
var parser = new CssParser();
var style = new CssStyleDeclaration(parser);
style.Update(declarations);
return style;
}
/// <summary>
/// Fills the given parent style with declarations given by the tokens.
/// </summary>
public void FillDeclarations(CssStyleDeclaration style)
{
var token = _tokenizer.Get();
while (token.IsNot(CssTokenType.Eof, CssTokenType.CurlyBracketClose))
{
var property = CreateDeclaration(ref token);
if (property != null && property.HasValue)
style.SetProperty(property);
}
}
/// <summary>
/// Computes the cascaded style, i.e. resolves the cascade by ordering after specifity.
/// Two rules with the same specifity are ordered according to their appearance. The more
/// recent declaration wins. Inheritance is not taken into account.
/// </summary>
/// <param name="styleCollection">The style rules to apply.</param>
/// <param name="element">The element to compute the cascade for.</param>
/// <returns>Returns the cascaded read-only style declaration.</returns>
public static CssStyleDeclaration ComputeCascadedStyle(this StyleCollection styleCollection, IElement element)
{
var computedStyle = new CssStyleDeclaration();
var rules = styleCollection.SortBySpecifity(element);
foreach (var rule in rules)
{
var inlineStyle = rule.Style;
computedStyle.SetDeclarations(inlineStyle.Declarations);
}
return computedStyle;
}
/// <summary>
/// Creates a new CSS style rule.
/// </summary>
internal CssStyleRule(CssParser parser)
: base(CssRuleType.Style, parser)
{
_style = new CssStyleDeclaration(this);
_selector = SimpleSelector.All;
}
/// <summary>
/// Creates a style declaration for the given source.
/// </summary>
/// <param name="source">
/// The source code for the inline style declaration.
/// </param>
/// <param name="options">
/// The options with the parameters for evaluating the style.
/// </param>
/// <returns>The created style declaration.</returns>
public ICssStyleDeclaration ParseInline(String source, StyleOptions options)
{
var parser = new CssParser(_options, options.Configuration);
var style = new CssStyleDeclaration(parser);
style.Update(source);
return style;
}
public void CSSStyleDeclarationUnbound()
{
var parser = new CssParser();
var css = new CssStyleDeclaration(parser);
var text = "background-color: rgb(255, 0, 0); color: rgb(0, 0, 0)";
css.CssText = text;
Assert.AreEqual(text, css.CssText);
Assert.AreEqual(2, css.Length);
}
public void CSSStyleDeclarationEmpty()
{
var parser = new CssParser();
var css = new CssStyleDeclaration(parser);
Assert.AreEqual("", css.CssText);
Assert.AreEqual(0, css.Length);
}
/// <summary>
/// Creates a new @keyframe rule.
/// </summary>
internal CssKeyframeRule(CssParser parser)
: base(CssRuleType.Keyframe, parser)
{
_style = new CssStyleDeclaration(this);
}
/// <summary>
/// Fills the given parent style with declarations given by the tokens.
/// </summary>
public TextPosition FillDeclarations(CssStyleDeclaration style)
{
var token = NextToken();
_nodes.Push(style);
CollectTrivia(ref token);
while (token.IsNot(CssTokenType.EndOfFile, CssTokenType.CurlyBracketClose))
{
var property = CreateDeclarationWith(Factory.Properties.Create, ref token);
if (property != null && property.HasValue)
{
style.SetProperty(property);
}
CollectTrivia(ref token);
}
_nodes.Pop();
return token.Position;
}
/// <summary>
/// Takes a string and appends all rules to the given list of
/// properties.
/// </summary>
internal void AppendDeclarations(CssStyleDeclaration style, String declarations)
{
var tokenizer = CreateTokenizer(declarations, _config);
var state = new CssUnknownState(tokenizer, this);
state.FillDeclarations(style);
}
public void CssPropertyFactoryCalls()
{
var parser = new CssParser();
var decl = new CssStyleDeclaration(parser);
var invalid = decl.CreateProperty("invalid");
var border = decl.CreateProperty("border");
var color = decl.CreateProperty("color");
decl.SetProperty(color);
var colorAgain = decl.CreateProperty("color");
Assert.IsNull(invalid);
Assert.IsNotNull(border);
Assert.IsNotNull(color);
Assert.IsNotNull(colorAgain);
Assert.IsInstanceOf<CssBorderProperty>(border);
Assert.IsInstanceOf<CssColorProperty>(color);
Assert.AreEqual(color, colorAgain);
}
