Move selector functions to own compile unit

Remove selector signatures

Author: mgreter

Makefile.conf

@@ -12,6 +12,7 @@ SOURCES = \
 	constants.cpp \
 	fn_utils.cpp \
 	fn_numbers.cpp \
+	fn_selectors.cpp \
 	functions.cpp \
 	color_maps.cpp \
 	environment.cpp \

src/context.cpp

@@ -30,6 +30,8 @@
 #include "prelexer.hpp"
 #include "emitter.hpp"
 #include "fn_utils.hpp"
+#include "fn_numbers.hpp"
+#include "fn_selectors.hpp"
 
 namespace Sass {
   using namespace Constants;

src/fn_selectors.cpp

@@ -0,0 +1,238 @@
+#include "parser.hpp"
+#include "extend.hpp"
+#include "fn_utils.hpp"
+#include "fn_selectors.hpp"
+
+namespace Sass {
+
+  namespace Functions {
+
+    Signature selector_nest_sig = "selector-nest($selectors...)";
+    BUILT_IN(selector_nest)
+    {
+      List_Ptr arglist = ARG("$selectors", List);
+
+      // Not enough parameters
+      if( arglist->length() == 0 )
+        error("$selectors: At least one selector must be passed for `selector-nest'", pstate, traces);
+
+      // Parse args into vector of selectors
+      SelectorStack parsedSelectors;
+      for (size_t i = 0, L = arglist->length(); i < L; ++i) {
+        Expression_Obj exp = Cast<Expression>(arglist->value_at_index(i));
+        if (exp->concrete_type() == Expression::NULL_VAL) {
+          std::stringstream msg;
+          msg << "$selectors: null is not a valid selector: it must be a string,\n";
+          msg << "a list of strings, or a list of lists of strings for 'selector-nest'";
+          error(msg.str(), pstate, traces);
+        }
+        if (String_Constant_Obj str = Cast<String_Constant>(exp)) {
+          str->quote_mark(0);
+        }
+        std::string exp_src = exp->to_string(ctx.c_options);
+        Selector_List_Obj sel = Parser::parse_selector(exp_src.c_str(), ctx, traces);
+        parsedSelectors.push_back(sel);
+      }
+
+      // Nothing to do
+      if( parsedSelectors.empty() ) {
+        return SASS_MEMORY_NEW(Null, pstate);
+      }
+
+      // Set the first element as the `result`, keep appending to as we go down the parsedSelector vector.
+      SelectorStack::iterator itr = parsedSelectors.begin();
+      Selector_List_Obj result = *itr;
+      ++itr;
+
+      for(;itr != parsedSelectors.end(); ++itr) {
+        Selector_List_Obj child = *itr;
+        std::vector<Complex_Selector_Obj> exploded;
+        selector_stack.push_back(result);
+        Selector_List_Obj rv = child->resolve_parent_refs(selector_stack, traces);
+        selector_stack.pop_back();
+        for (size_t m = 0, mLen = rv->length(); m < mLen; ++m) {
+          exploded.push_back((*rv)[m]);
+        }
+        result->elements(exploded);
+      }
+
+      Listize listize;
+      return Cast<Value>(result->perform(&listize));
+    }
+
+    Signature selector_append_sig = "selector-append($selectors...)";
+    BUILT_IN(selector_append)
+    {
+      List_Ptr arglist = ARG("$selectors", List);
+
+      // Not enough parameters
+      if( arglist->length() == 0 )
+        error("$selectors: At least one selector must be passed for `selector-append'", pstate, traces);
+
+      // Parse args into vector of selectors
+      SelectorStack parsedSelectors;
+      for (size_t i = 0, L = arglist->length(); i < L; ++i) {
+        Expression_Obj exp = Cast<Expression>(arglist->value_at_index(i));
+        if (exp->concrete_type() == Expression::NULL_VAL) {
+          std::stringstream msg;
+          msg << "$selectors: null is not a valid selector: it must be a string,\n";
+          msg << "a list of strings, or a list of lists of strings for 'selector-append'";
+          error(msg.str(), pstate, traces);
+        }
+        if (String_Constant_Ptr str = Cast<String_Constant>(exp)) {
+          str->quote_mark(0);
+        }
+        std::string exp_src = exp->to_string();
+        Selector_List_Obj sel = Parser::parse_selector(exp_src.c_str(), ctx, traces);
+        parsedSelectors.push_back(sel);
+      }
+
+      // Nothing to do
+      if( parsedSelectors.empty() ) {
+        return SASS_MEMORY_NEW(Null, pstate);
+      }
+
+      // Set the first element as the `result`, keep appending to as we go down the parsedSelector vector.
+      SelectorStack::iterator itr = parsedSelectors.begin();
+      Selector_List_Obj result = *itr;
+      ++itr;
+
+      for(;itr != parsedSelectors.end(); ++itr) {
+        Selector_List_Obj child = *itr;
+        std::vector<Complex_Selector_Obj> newElements;
+
+        // For every COMPLEX_SELECTOR in `result`
+        // For every COMPLEX_SELECTOR in `child`
+          // let parentSeqClone equal a copy of result->elements[i]
+          // let childSeq equal child->elements[j]
+          // Append all of childSeq head elements into parentSeqClone
+          // Set the innermost tail of parentSeqClone, to childSeq's tail
+        // Replace result->elements with newElements
+        for (size_t i = 0, resultLen = result->length(); i < resultLen; ++i) {
+          for (size_t j = 0, childLen = child->length(); j < childLen; ++j) {
+            Complex_Selector_Obj parentSeqClone = SASS_MEMORY_CLONE((*result)[i]);
+            Complex_Selector_Obj childSeq = (*child)[j];
+            Complex_Selector_Obj base = childSeq->tail();
+
+            // Must be a simple sequence
+            if( childSeq->combinator() != Complex_Selector::Combinator::ANCESTOR_OF ) {
+              std::string msg("Can't append \"");
+              msg += childSeq->to_string();
+              msg += "\" to \"";
+              msg += parentSeqClone->to_string();
+              msg += "\" for `selector-append'";
+              error(msg, pstate, traces);
+            }
+
+            // Cannot be a Universal selector
+            Element_Selector_Obj pType = Cast<Element_Selector>(childSeq->head()->first());
+            if(pType && pType->name() == "*") {
+              std::string msg("Can't append \"");
+              msg += childSeq->to_string();
+              msg += "\" to \"";
+              msg += parentSeqClone->to_string();
+              msg += "\" for `selector-append'";
+              error(msg, pstate, traces);
+            }
+
+            // TODO: Add check for namespace stuff
+
+            // append any selectors in childSeq's head
+            parentSeqClone->innermost()->head()->concat(base->head());
+
+            // Set parentSeqClone new tail
+            parentSeqClone->innermost()->tail( base->tail() );
+
+            newElements.push_back(parentSeqClone);
+          }
+        }
+
+        result->elements(newElements);
+      }
+
+      Listize listize;
+      return Cast<Value>(result->perform(&listize));
+    }
+
+    Signature selector_unify_sig = "selector-unify($selector1, $selector2)";
+    BUILT_IN(selector_unify)
+    {
+      Selector_List_Obj selector1 = ARGSELS("$selector1");
+      Selector_List_Obj selector2 = ARGSELS("$selector2");
+
+      Selector_List_Obj result = selector1->unify_with(selector2);
+      Listize listize;
+      return Cast<Value>(result->perform(&listize));
+    }
+
+    Signature simple_selectors_sig = "simple-selectors($selector)";
+    BUILT_IN(simple_selectors)
+    {
+      Compound_Selector_Obj sel = ARGSEL("$selector");
+
+      List_Ptr l = SASS_MEMORY_NEW(List, sel->pstate(), sel->length(), SASS_COMMA);
+
+      for (size_t i = 0, L = sel->length(); i < L; ++i) {
+        Simple_Selector_Obj ss = (*sel)[i];
+        std::string ss_string = ss->to_string() ;
+
+        l->append(SASS_MEMORY_NEW(String_Quoted, ss->pstate(), ss_string));
+      }
+
+      return l;
+    }
+
+    Signature selector_extend_sig = "selector-extend($selector, $extendee, $extender)";
+    BUILT_IN(selector_extend)
+    {
+      Selector_List_Obj  selector = ARGSELS("$selector");
+      Selector_List_Obj  extendee = ARGSELS("$extendee");
+      Selector_List_Obj  extender = ARGSELS("$extender");
+
+      Subset_Map subset_map;
+      extender->populate_extends(extendee, subset_map);
+      Extend extend(subset_map);
+
+      Selector_List_Obj result = extend.extendSelectorList(selector, false);
+
+      Listize listize;
+      return Cast<Value>(result->perform(&listize));
+    }
+
+    Signature selector_replace_sig = "selector-replace($selector, $original, $replacement)";
+    BUILT_IN(selector_replace)
+    {
+      Selector_List_Obj selector = ARGSELS("$selector");
+      Selector_List_Obj original = ARGSELS("$original");
+      Selector_List_Obj replacement = ARGSELS("$replacement");
+      Subset_Map subset_map;
+      replacement->populate_extends(original, subset_map);
+      Extend extend(subset_map);
+
+      Selector_List_Obj result = extend.extendSelectorList(selector, true);
+
+      Listize listize;
+      return Cast<Value>(result->perform(&listize));
+    }
+
+    Signature selector_parse_sig = "selector-parse($selector)";
+    BUILT_IN(selector_parse)
+    {
+      Selector_List_Obj sel = ARGSELS("$selector");
+
+      Listize listize;
+      return Cast<Value>(sel->perform(&listize));
+    }
+
+    Signature is_superselector_sig = "is-superselector($super, $sub)";
+    BUILT_IN(is_superselector)
+    {
+      Selector_List_Obj  sel_sup = ARGSELS("$super");
+      Selector_List_Obj  sel_sub = ARGSELS("$sub");
+      bool result = sel_sup->is_superselector_of(sel_sub);
+      return SASS_MEMORY_NEW(Boolean, pstate, result);
+    }
+
+  }
+
+}

src/fn_selectors.hpp

@@ -0,0 +1,35 @@
+#ifndef SASS_FN_SELECTORS_H
+#define SASS_FN_SELECTORS_H
+
+#include "fn_utils.hpp"
+
+namespace Sass {
+
+  namespace Functions {
+
+    #define ARGSEL(argname) get_arg_sel(argname, env, sig, pstate, traces, ctx)
+    #define ARGSELS(argname) get_arg_sels(argname, env, sig, pstate, traces, ctx)
+
+    BUILT_IN(selector_nest);
+    BUILT_IN(selector_append);
+    BUILT_IN(selector_extend);
+    BUILT_IN(selector_replace);
+    BUILT_IN(selector_unify);
+    BUILT_IN(is_superselector);
+    BUILT_IN(simple_selectors);
+    BUILT_IN(selector_parse);
+
+    extern Signature selector_nest_sig;
+    extern Signature selector_append_sig;
+    extern Signature selector_extend_sig;
+    extern Signature selector_replace_sig;
+    extern Signature selector_unify_sig;
+    extern Signature is_superselector_sig;
+    extern Signature simple_selectors_sig;
+    extern Signature selector_parse_sig;
+
+  }
+
+}
+
+#endif

src/fn_utils.hpp

@@ -28,9 +28,6 @@ namespace Sass {
   #define COLOR_NUM(argname) color_num(argname, env, sig, pstate, traces) // double
   #define ALPHA_NUM(argname) alpha_num(argname, env, sig, pstate, traces) // double
 
-  #define ARGSEL(argname) get_arg_sel(argname, env, sig, pstate, traces, ctx)
-  #define ARGSELS(argname) get_arg_sels(argname, env, sig, pstate, traces, ctx)
-
   typedef const char* Signature;
 
   typedef Expression_Ptr (*Native_Function)(Env&, Env&, Context&, Signature, ParserState, Backtraces, SelectorStack);