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 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;
}