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");
}
//
// The `primary` rule is the *entry* and *exit* point of the parser.
// The rules here can appear at any level of the parse tree.
//
// The recursive nature of the grammar is an interplay between the `block`
// rule, which represents `{ ... }`, the `ruleset` rule, and this `primary` rule,
// as represented by this simplified grammar:
//
// primary → (ruleset | rule)+
// ruleset → selector+ block
// block → '{' primary '}'
//
// Only at one point is the primary rule not called from the
// block rule: at the root level.
//
public NodeList Primary(Parser parser)
{
Node node;
var root = new NodeList();
NodeList comments = null;
GatherComments(parser);
while (node = MixinDefinition(parser) || Rule(parser) || PullComments() || Ruleset(parser) ||
MixinCall(parser) || Directive(parser))
{
if (comments = PullComments())
{
root.AddRange(comments);
}
comments = node as NodeList;
if (comments)
root.AddRange(comments);
else
root.Add(node);
GatherComments(parser);
}
return root;
}
public override Node Evaluate(Env env)
{
var found = false;
var closures = env.FindRulesets(Selector);
if(closures == null)
throw new ParsingException(Selector.ToCSS(env).Trim() + " is undefined", Index);
env.Rule = this;
var rules = new NodeList();
foreach (var closure in closures)
{
var ruleset = closure.Ruleset;
if (!ruleset.MatchArguements(Arguments, env))
continue;
found = true;
if (ruleset is MixinDefinition)
{
try
{
var mixin = ruleset as MixinDefinition;
rules.AddRange(mixin.Evaluate(Arguments, env, closure.Context).Rules);
}
catch (ParsingException e)
{
throw new ParsingException(e.Message, e.Index, Index);
}
}
else
{
if (ruleset.Rules != null)
{
var nodes = new List<Node>(ruleset.Rules);
NodeHelper.ExpandNodes<MixinCall>(env, nodes);
rules.AddRange(nodes);
}
}
}
env.Rule = null;
if (!found)
{
var message = String.Format("No matching definition was found for `{0}({1})`",
Selector.ToCSS(env).Trim(),
StringExtensions.JoinStrings(Arguments.Select(a => a.ToCSS(env)), ", "));
throw new ParsingException(message, Index);
}
return rules;
}
public CartoDefinition(CartoSelector selector, CartoRule[] rules)
{
m_rules = new NodeList<CartoRule>();
m_elements = selector.Elements;
m_filters = selector.Filters;
m_rules.AddRange(rules);
m_zoom = selector.Zoom;
m_attachment = selector.Attachment ?? "__default__";
m_ruleIndex = new List<string>();
for (int i = 0; i < m_rules.Count; i++)
{
m_rules[i].Zoom = selector.Zoom;
m_ruleIndex.Add(m_rules[i].Id);
}
m_specificity = selector.Specificity();
}
public Ruleset Evaluate(List<NamedArgument> args, Env env, List<Ruleset> closureContext)
{
var frame = EvaluateParams(env, args);
var frames = new[] { this, frame }.Concat(env.Frames).Concat(closureContext).Reverse();
var context = env.CreateChildEnv(new Stack<Ruleset>(frames));
var newRules = new NodeList();
foreach (var rule in Rules)
{
if (rule is MixinDefinition)
{
var mixin = rule as MixinDefinition;
var parameters = Enumerable.Concat(mixin.Params, frame.Rules.Cast<Rule>());
newRules.Add(new MixinDefinition(mixin.Name, new NodeList<Rule>(parameters), mixin.Rules, mixin.Condition));
}
else if (rule is Directive)
{
newRules.Add(rule);
}
else if (rule is Ruleset)
{
var ruleset = (rule as Ruleset);
context.Frames.Push(ruleset);
var rules = new NodeList(NodeHelper.NonDestructiveExpandNodes<MixinCall>(context, ruleset.Rules)
.Select(r => r.Evaluate(context)));
context.Frames.Pop();
newRules.Add(new Ruleset(ruleset.Selectors, rules));
}
else if (rule is MixinCall)
{
newRules.AddRange((NodeList)rule.Evaluate(context));
}
else
{
newRules.Add(rule.Evaluate(context));
}
}
return new Ruleset(null, newRules);
}
public override Node Evaluate(Env env)
{
var found = false;
var closures = env.FindRulesets(Selector);
if(closures == null)
throw new ParsingException(Selector.ToCSS(env).Trim() + " is undefined", Location);
env.Rule = this;
var rules = new NodeList();
if (PreComments)
rules.AddRange(PreComments);
foreach (var closure in closures)
{
var ruleset = closure.Ruleset;
var matchType = ruleset.MatchArguments(Arguments, env);
if (matchType == MixinMatch.ArgumentMismatch)
continue;
found = true;
if (matchType == MixinMatch.GuardFail)
continue;
if (ruleset is MixinDefinition)
{
try
{
var mixin = ruleset as MixinDefinition;
rules.AddRange(mixin.Evaluate(Arguments, env, closure.Context).Rules);
}
catch (ParsingException e)
{
throw new ParsingException(e.Message, e.Location, Location);
}
}
else
{
if (ruleset.Rules != null)
{
var nodes = new NodeList(ruleset.Rules);
NodeHelper.ExpandNodes<MixinCall>(env, nodes);
rules.AddRange(nodes);
}
}
}
if (PostComments)
rules.AddRange(PostComments);
env.Rule = null;
if (!found)
{
var message = String.Format("No matching definition was found for `{0}({1})`",
Selector.ToCSS(env).Trim(),
Arguments.Select(a => a.Value.ToCSS(env)).JoinStrings(env.Compress ? "," : ", "));
throw new ParsingException(message, Location);
}
if (Important)
{
var importantRules = new NodeList();
foreach (Node node in rules)
{
Rule r = node as Rule;
if (r != null)
{
var valueNode = r.Value;
var value = valueNode as Value;
value = value != null
? new Value(value.Values, "!important").ReducedFrom<Value>(value)
: new Value(new NodeList {valueNode}, "!important");
importantRules.Add((new Rule(r.Name, value)).ReducedFrom<Rule>(r));
}
else
{
importantRules.Add(node);
}
}
return importantRules;
}
return rules;
}
/// <summary>
/// Flattens a list of nodes seperated by comma so that all the conditions are on the bottom.
/// e.g.
/// (A) and (B) and (C) => A and B and C
/// (A, B) and (D) and (C) => A and D and C, B and D and C
/// (A) and (B) and (C, D) => A and B and C, A and B and D
///
/// It does this by generating a list of permutations for the last n-1 then n-2
/// and with each call it multiplies out the OR'd elements
/// </summary>
private NodeList Permute(NodeList<NodeList> arr)
{
// in simple cases return
if (arr.Count == 0)
return new NodeList();
if (arr.Count == 1)
{
return arr[0];
}
NodeList returner = new NodeList();
// run permute on the next n-1
NodeList<NodeList> sliced = new NodeList<NodeList>(arr.Skip(1));
NodeList rest = Permute(sliced);
//now multiply
for (int i = 0; i < rest.Count; i++)
{
NodeList inner = arr[0];
for (int j = 0; j < inner.Count; j++)
{
NodeList newl = new NodeList();
newl.Add(inner[j]);
NodeList addition = rest[i] as NodeList;
if (addition)
{
newl.AddRange(addition);
}
else
{
newl.Add(rest[i]);
}
//add an expression so it seperated by spaces
returner.Add(new Expression(newl));
}
}
return returner;
}
public Ruleset Evaluate(List<NamedArgument> args, Env env, List<Ruleset> closureContext)
{
// if (args != null && args.Any())
// Guard.ExpectMaxArguments(Params.Count, args.Count, String.Format("'{0}'", Name), Index);
var arguments = new Dictionary<string, Node>();
args = args ?? new List<NamedArgument>();
var hasNamedArgs = false;
foreach (var arg in args)
{
if (!string.IsNullOrEmpty(arg.Name))
{
hasNamedArgs = true;
arguments[arg.Name] = new Rule(arg.Name, arg.Value.Evaluate(env)) { Index = arg.Value.Index };
}
else if (hasNamedArgs)
throw new ParsingException("Positional arguments must appear before all named arguments.", arg.Value.Index);
}
for (var i = 0; i < Params.Count; i++)
{
if (String.IsNullOrEmpty(Params[i].Name))
continue;
if (arguments.ContainsKey(Params[i].Name))
continue;
Node val;
if (i < args.Count && string.IsNullOrEmpty(args[i].Name))
val = args[i].Value;
else
val = Params[i].Value;
if (val)
arguments[Params[i].Name] = new Rule(Params[i].Name, val.Evaluate(env)) {Index = val.Index};
else
throw new ParsingException(
String.Format("wrong number of arguments for {0} ({1} for {2})", Name,
args != null ? args.Count : 0, _arity), Index);
}
var _arguments = new List<Node>();
for(var i = 0; i < Math.Max(Params.Count, args.Count); i++)
{
_arguments.Add(i < args.Count ? args[i].Value : Params[i].Value);
}
var frame = new Ruleset(null, new NodeList());
frame.Rules.Insert(0, new Rule("@arguments", new Expression(_arguments.Where(a => a != null)).Evaluate(env)));
foreach (var arg in arguments)
{
frame.Rules.Add(arg.Value);
}
var frames = new[] { this, frame }.Concat(env.Frames).Concat(closureContext).Reverse();
var context = new Env {Frames = new Stack<Ruleset>(frames)};
var newRules = new NodeList();
foreach (var rule in Rules)
{
if (rule is MixinDefinition)
{
var mixin = rule as MixinDefinition;
var parameters = Enumerable.Concat(mixin.Params, frame.Rules.Cast<Rule>());
newRules.Add(new MixinDefinition(mixin.Name, new NodeList<Rule>(parameters), mixin.Rules));
}
else if (rule is Ruleset)
{
var ruleset = (rule as Ruleset);
context.Frames.Push(ruleset);
var rules = new NodeList(NodeHelper.NonDestructiveExpandNodes<MixinCall>(context, ruleset.Rules)
.Select(r => r.Evaluate(context)));
context.Frames.Pop();
newRules.Add(new Ruleset(ruleset.Selectors, rules));
}
else if (rule is MixinCall)
{
newRules.AddRange((NodeList) rule.Evaluate(context));
}
else
{
newRules.Add(rule.Evaluate(context));
}
}
return new Ruleset(null, newRules);
}
public override Node Evaluate(Env env)
{
var closures = env.FindRulesets(Selector);
if (closures == null)
throw new ParsingException(Selector.ToCSS(env).Trim() + " is undefined", Location);
env.Rule = this;
var rules = new NodeList();
if (PreComments)
rules.AddRange(PreComments);
var rulesetList = closures.ToList();
// To address bug https://github.com/dotless/dotless/issues/136, where a mixin and ruleset selector may have the same name, we
// need to favour matching a MixinDefinition with the required Selector and only fall back to considering other Ruleset types
// if no match is found.
// However, in order to support having a regular ruleset with the same name as a parameterized
// mixin (see https://github.com/dotless/dotless/issues/387), we need to take argument counts into account, so we make the
// decision after evaluating for argument match.
var mixins = rulesetList.Where(c => c.Ruleset is MixinDefinition).ToList();
var defaults = new List<Closure>();
bool foundMatches = false, foundExactMatches = false, foundDefaultMatches = false;
foreach (var closure in mixins)
{
var ruleset = (MixinDefinition)closure.Ruleset;
var matchType = ruleset.MatchArguments(Arguments, env);
if (matchType == MixinMatch.ArgumentMismatch)
{
continue;
}
if (matchType == MixinMatch.Default) {
defaults.Add(closure);
foundDefaultMatches = true;
continue;
}
foundMatches = true;
if (matchType == MixinMatch.GuardFail)
{
continue;
}
foundExactMatches = true;
try
{
var closureEnvironment = env.CreateChildEnvWithClosure(closure);
rules.AddRange(ruleset.Evaluate(Arguments, closureEnvironment).Rules);
}
catch (ParsingException e)
{
throw new ParsingException(e.Message, e.Location, Location);
}
}
if (!foundExactMatches && foundDefaultMatches) {
foreach (var closure in defaults) {
try {
var closureEnvironment = env.CreateChildEnvWithClosure(closure);
var ruleset = (MixinDefinition) closure.Ruleset;
rules.AddRange(ruleset.Evaluate(Arguments, closureEnvironment).Rules);
} catch (ParsingException e) {
throw new ParsingException(e.Message, e.Location, Location);
}
}
foundMatches = true;
}
if (!foundMatches)
{
var regularRulesets = rulesetList.Except(mixins);
foreach (var closure in regularRulesets)
{
if (closure.Ruleset.Rules != null) {
var nodes = (NodeList)closure.Ruleset.Rules.Clone();
NodeHelper.ExpandNodes<MixinCall>(env, nodes);
rules.AddRange(nodes);
}
foundMatches = true;
}
}
if (PostComments)
rules.AddRange(PostComments);
env.Rule = null;
if (!foundMatches)
{
var message = String.Format("No matching definition was found for `{0}({1})`",
Selector.ToCSS(env).Trim(),
Arguments.Select(a => a.Value.ToCSS(env)).JoinStrings(env.Compress ? "," : ", "));
throw new ParsingException(message, Location);
}
rules.Accept(new ReferenceVisitor(IsReference));
if (Important)
{
return MakeRulesImportant(rules);
}
return rules;
}
public Ruleset Evaluate(List<NamedArgument> args, Env env, List<Ruleset> closureContext)
{
var frame = EvaluateParams(env, args);
var frames = new[] { this, frame }.Concat(env.Frames).Concat(closureContext).Reverse();
var context = env.CreateChildEnv(new Stack<Ruleset>(frames));
var newRules = new NodeList();
foreach (var rule in Rules)
{
if (rule is MixinDefinition)
{
var mixin = rule as MixinDefinition;
var parameters = Enumerable.Concat(mixin.Params, frame.Rules.Cast<Rule>());
newRules.Add(new MixinDefinition(mixin.Name, new NodeList<Rule>(parameters), mixin.Rules, mixin.Condition, mixin.Variadic));
}
else if (rule is Import)
{
var potentiolNodeList = rule.Evaluate(context);
var nodeList = potentiolNodeList as NodeList;
if (nodeList != null)
{
newRules.AddRange(nodeList);
}
else
{
newRules.Add(potentiolNodeList);
}
}
else if (rule is Directive || rule is Media)
{
newRules.Add(rule.Evaluate(context));
}
else if (rule is Ruleset)
{
var ruleset = (rule as Ruleset);
context.Frames.Push(ruleset);
newRules.Add(ruleset.Evaluate(context));
context.Frames.Pop();
}
else if (rule is MixinCall)
{
newRules.AddRange((NodeList)rule.Evaluate(context));
}
else
{
newRules.Add(rule.Evaluate(context));
}
}
return new Ruleset(null, newRules);
}
public NodeList Find(Selector selector, Ruleset self)
{
self = self ?? this;
var rules = new NodeList();
var key = selector.ToCSS();
if (_lookups.ContainsKey(key))
return _lookups[key];
foreach (var rule in Rulesets().Where(rule => rule != self))
{
if (rule.Selectors && rule.Selectors.Any(selector.Match))
{
if (selector.Elements.Count > 1)
{
var remainingSelectors = new Selector(new NodeList<Element>(selector.Elements.Skip(1)));
rules.AddRange(rule.Find(remainingSelectors, self));
}
else
rules.Add(rule);
}
}
return _lookups[key] = rules;
}
public override Node Evaluate(Env env)
{
var found = false;
var closures = env.FindRulesets(Selector);
if (closures == null)
{
throw new ParsingException(Selector.ToCSS(env).Trim() + " is undefined", Index);
}
env.Rule = this;
var rules = new NodeList();
if (PreComments)
{
rules.Add(PreComments);
}
foreach (var closure in closures)
{
var ruleset = closure.Ruleset;
if (!ruleset.MatchArguments(Arguments, env))
{
continue;
}
found = true;
if (ruleset is MixinDefinition)
{
try
{
var mixin = ruleset as MixinDefinition;
rules.AddRange(mixin.Evaluate(Arguments, env, closure.Context).Rules);
}
catch (ParsingException e)
{
throw new ParsingException(e.Message, e.Index, Index);
}
}
else
{
if (ruleset.Rules != null)
{
var nodes = new NodeList(ruleset.Rules);
NodeHelper.ExpandNodes <MixinCall>(env, nodes);
rules.AddRange(nodes);
}
}
}
if (PostComments)
{
rules.Add(PostComments);
}
env.Rule = null;
if (!found)
{
var message = String.Format("No matching definition was found for `{0}({1})`",
Selector.ToCSS(env).Trim(),
StringExtensions.JoinStrings(Arguments.Select(a => a.Value.ToCSS(env)), ", "));
throw new ParsingException(message, Index);
}
return(rules);
}
