public override string ToCSS(Env env)
{
if (Variable)
return "";
return Name + ": " + Value.ToCSS(env) + ";";
}
public override string ToCSS(List<IEnumerable<Selector>> context, Env env)
{
if (Css)
return "@import " + OriginalPath.ToCSS(env) + ";\n";
return "";
}
public override Node Evaluate(Env env)
{
if (Values.Count == 1)
return Values[0].Evaluate(env);
return new Value(Values.Select(n => n.Evaluate(env)), Important);
}
public override string ToCSS(List<IEnumerable<Selector>> context, Env env)
{
if (Rules != null)
return Name + " {\n " + Rules.Select(r => r.ToCSS(env)).JoinStrings("\n ") + "\n}\n";
return Name + " " + Value.ToCSS(env) + ";\n";
}
public override Node Evaluate(Env env)
{
if (Value.Count > 1)
return new Expression(new NodeList(Value.Select(e => e.Evaluate(env))));
return Value[0].Evaluate(env);
}
public string GetUrl(Env env)
{
if (Value is Quoted)
return ((Quoted) Value).Contents;
return Value.ToCSS(env);
}
public override Node Evaluate(Env env)
{
foreach (var frame in env.Frames)
{
NodeList mixins;
if ((mixins = frame.Find(Selector, null)).Count == 0)
continue;
var rules = new NodeList();
foreach (var node in mixins)
{
if(!(node is Ruleset))
continue;
var ruleset = node as Ruleset;
if(!ruleset.MatchArguements(Arguments, env))
continue;
if (node is Mixin.Definition)
{
var mixin = node as Mixin.Definition;
rules.AddRange(mixin.Evaluate(Arguments, env).Rules);
}
else
{
if (ruleset.Rules != null)
rules.AddRange(ruleset.Rules);
}
// todo fix for other Ruleset types?
}
return rules;
}
throw new ParsingException(Selector.ToCSS().Trim() + " is undefined");
}
public override string ToCSS(Env env)
{
if (!string.IsNullOrEmpty(_css))
return _css;
return _css = Elements.Select(e => e.ToCSS(env)).JoinStrings("");
}
public override string ToCSS(Env env)
{
var evaled = Value
.Select(e => e is IEvaluatable ? e.Evaluate(env) : e)
.Select(e => e.ToCSS(env));
return evaled.JoinStrings(" ");
}
public Ruleset Evaluate(NodeList<Expression> args, Env env)
{
if(args)
Guard.ExpectMaxArguments(Params.Count, args.Count, string.Format("'{0}'", Name));
var frame = new Ruleset(null, new List<Node>());
for (var i = 0; i < Params.Count; i++)
{
if (!string.IsNullOrEmpty(Params[i].Name))
{
Node val;
if (args && i < args.Count)
val = args[i];
else
val = Params[i].Value;
if (val)
frame.Rules.Add(new Rule(Params[i].Name, val));
else
throw new ParsingException("wrong number of arguments for " + Name);
}
}
var frames = new[] {this, frame}.Concat(env.Frames).Reverse();
var context = new Env{ Frames = new Stack<Ruleset>(frames) };
var newRules = new List<Node>();
foreach (var rule in Rules)
{
if (rule is Mixin.Definition)
{
var mixin = rule as Mixin.Definition;
var parameters = mixin.Params.Concat(frame.Rules.Cast<Rule>());
newRules.Add(new Mixin.Definition(mixin.Name, new NodeList<Rule>(parameters), mixin.Rules));
}
else if (rule is Ruleset)
{
var ruleset = (rule as Ruleset);
var rules = ruleset.Rules
.Select(r => r.Evaluate(context))
.ToList();
newRules.Add(new Ruleset(ruleset.Selectors, rules));
}
else if (rule is Mixin.Call)
{
newRules.AddRange((NodeList)rule.Evaluate(context));
}
else
{
newRules.Add(rule.Evaluate(context));
}
}
return new Ruleset(null, newRules);
}
public override Node Evaluate(Env env)
{
if (Css)
return new NodeList(this);
NodeHelper.ExpandNodes<Import>(env, InnerRoot);
return new NodeList(InnerRoot.Rules);
}
public override Node Evaluate(Env env)
{
if(Rules != null)
Rules = new List<Node>(Rules.Select(r => r.Evaluate(env)));
else
Value = Value.Evaluate(env);
return this;
}
public override Node Evaluate(Env env)
{
var variable = env.Frames.SelectFirst(frame => frame.Variable(Name));
if (variable)
return variable.Value.Evaluate(env);
throw new ParsingException("variable " + Name + " is undefined");
}
public override Node Evaluate(Env env)
{
if (Css)
return new NodeList(new TextNode("@import " + OriginalPath.ToCSS() + ";\n"));
NodeHelper.ExpandNodes<Import>(env, InnerRoot);
return new NodeList(InnerRoot.Rules);
}
public override string ToCSS(Env env)
{
switch (Value)
{
case "": return "";
case " ": return " ";
case "&": return "";
case ":": return " :";
case "::": return "::";
case "+": return " + ";
case "~": return " ~ ";
case ">": return " > ";
}
return "";
}
public override Node Evaluate(Env env)
{
if(Root)
{
env = env ?? new Env();
NodeHelper.ExpandNodes<Import>(env, this);
}
env.Frames.Push(this);
NodeHelper.ExpandNodes<Mixin.Call>(env, this);
for (var i = 0; i < Rules.Count; i++)
{
Rules[i] = Rules[i].Evaluate(env);
}
env.Frames.Pop();
return this;
}
public override Node Evaluate(Env env)
{
var a = First.Evaluate(env);
var b = Second.Evaluate(env);
if (a is Number && b is Color) {
if (Operator == "*" || Operator == "+")
{
var temp = b;
b = a;
a = temp;
}
else
throw new InvalidOperationException("Can't substract or divide a color from a number");
}
var operable = a as IOperable;
if (operable != null)
return operable.Operate(Operator, b);
return null;
}
public override Node Evaluate(Env env)
{
if (Evaluated != null)
return Evaluated;
var args = Arguments.Select(a => a.Evaluate(env));
if (env != null)
{
var function = env.GetFunction(Name);
if (function != null)
{
function.Name = Name;
Evaluated = function.Call(args);
return Evaluated;
}
}
Evaluated = new TextNode(Name + "(" + Arguments.Select(a => a.Evaluate(env).ToCSS()).JoinStrings(", ") + ")");
return Evaluated;
}
public override string ToCSS(Env env)
{
return Combinator.ToCSS(env) + Value;
}
public override Node Evaluate(Env env)
{
return (Node) Color.GetColorFromKeyword(Value) ?? this;
}
public override string ToCSS(Env env)
{
var rgb = RGB
.Select(d => (int) Math.Round(d, MidpointRounding.AwayFromZero))
.Select(i => i > 255 ? 255 : (i < 0 ? 0 : i))
.ToArray();
if (Alpha < 1.0)
return string.Format("rgba({0}, {1}, {2}, {3})", rgb[0], rgb[1], rgb[2], Alpha);
var keyword = GetKeyword(rgb);
if (!string.IsNullOrEmpty(keyword))
return keyword;
return '#' + rgb
.Select(i => i.ToString("X2"))
.JoinStrings("")
.ToLowerInvariant();
}
public override string ToCSS(Env env)
{
return Evaluate(env).ToCSS(env);
}
public override string ToCSS(Env env)
{
return "url(" + Value.ToCSS(env) + ")";
}
public override Node Evaluate(Env env)
{
Value = Value.Evaluate(env);
return this;
}
public override bool MatchArguements(NodeList<Expression> arguements, Env env)
{
var argsLength = arguements != null ? arguements.Count : 0;
if (argsLength < _required || argsLength > _arity)
return false;
for (var i = 0; i < argsLength; i++)
{
if (string.IsNullOrEmpty(Params[i].Name))
{
if (arguements[i].Evaluate(env).ToCSS() != Params[i].Value.Evaluate(env).ToCSS())
{
return false;
}
}
}
return true;
}
public override Node Evaluate(Env env)
{
return this;
}
public override string ToCSS(Env env)
{
return string.Format("alpha(opacity={0})", Value.ToCSS(env));
}
public override string ToCSS(List<IEnumerable<Selector>> list, Env env)
{
return "";
}
public override string ToCSS(Env env)
{
return Value;
}
public override Node Evaluate(Env env)
{
return new Rule(Name, Value.Evaluate(env));
}