Basic implementation of @apply

third_party/WebKit/Source/build/scripts/make_css_property_names.py

 #!/usr/bin/env python
 
 import subprocess
 import sys
 
 import css_properties
 import in_generator
 import license
 
 
@@ skipping 10 matching lines @@
 
 namespace WTF {
 class AtomicString;
 class String;
 }
 
 namespace blink {
 
 enum CSSPropertyID {
     CSSPropertyInvalid = 0,
-    CSSPropertyVariable = 1,
+    // This isn't a property, but we need to know the position of @apply rules in style rules
+    CSSPropertyApplyAtRule = 1,
+    CSSPropertyVariable = 2,
 %(property_enums)s
 };
 
 const int firstCSSProperty = %(first_property_id)s;
 const int numCSSProperties = %(properties_count)s;
 const int lastCSSProperty = %(last_property_id)d;
 const int lastUnresolvedCSSProperty = %(last_unresolved_property_id)d;
 const size_t maxCSSPropertyNameLength = %(max_name_length)d;
 
 const char* getPropertyName(CSSPropertyID);
 const WTF::AtomicString& getPropertyNameAtomicString(CSSPropertyID);
 WTF::String getPropertyNameString(CSSPropertyID);
 WTF::String getJSPropertyName(CSSPropertyID);
 
 inline CSSPropertyID convertToCSSPropertyID(int value)
 {
-    ASSERT((value >= firstCSSProperty && value <= lastCSSProperty) || value == CSSPropertyInvalid || value == CSSPropertyVariable);
+    ASSERT(value >= CSSPropertyInvalid && value <= lastCSSProperty);
     return static_cast<CSSPropertyID>(value);
 }
 
 inline CSSPropertyID resolveCSSPropertyID(CSSPropertyID id)
 {
     return convertToCSSPropertyID(id & ~512);
 }
 
 inline bool isPropertyAlias(CSSPropertyID id) { return id & 512; }
 
@@ skipping 170 matching lines @@
         # FIXME: If we could depend on Python 2.7, we would use subprocess.check_output
         gperf_args = [self.gperf_path, '--key-positions=*', '-P', '-n']
         gperf_args.extend(['-m', '50'])  # Pick best of 50 attempts.
         gperf_args.append('-D')  # Allow duplicate hashes -> More compact code.
         gperf = subprocess.Popen(gperf_args, stdin=subprocess.PIPE, stdout=subprocess.PIPE, universal_newlines=True)
         return gperf.communicate(gperf_input)[0]
 
 
 if __name__ == "__main__":
     in_generator.Maker(CSSPropertyNamesWriter).main(sys.argv)