blob: 5bdaa1c55ae3d3cfad22c4b3531f8d487e03e01b [file] [log] [blame]
#!/usr/bin/env python
import subprocess
import sys
import css_properties
import in_generator
import license
HEADER_TEMPLATE = """
%(license)s
#ifndef %(class_name)s_h
#define %(class_name)s_h
#include "core/css/parser/CSSParserMode.h"
#include "wtf/HashFunctions.h"
#include "wtf/HashTraits.h"
#include <string.h>
namespace WTF {
class AtomicString;
class String;
}
namespace blink {
enum CSSPropertyID {
CSSPropertyInvalid = 0,
CSSPropertyVariable = 1,
%(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);
return static_cast<CSSPropertyID>(value);
}
inline CSSPropertyID resolveCSSPropertyID(CSSPropertyID id)
{
return convertToCSSPropertyID(id & ~512);
}
inline bool isPropertyAlias(CSSPropertyID id) { return id & 512; }
CSSPropertyID unresolvedCSSPropertyID(const WTF::String&);
CSSPropertyID cssPropertyID(const WTF::String&);
} // namespace blink
namespace WTF {
template<> struct DefaultHash<blink::CSSPropertyID> { typedef IntHash<unsigned> Hash; };
template<> struct HashTraits<blink::CSSPropertyID> : GenericHashTraits<blink::CSSPropertyID> {
static const bool emptyValueIsZero = true;
static void constructDeletedValue(blink::CSSPropertyID& slot, bool) { slot = static_cast<blink::CSSPropertyID>(blink::lastUnresolvedCSSProperty + 1); }
static bool isDeletedValue(blink::CSSPropertyID value) { return value == (blink::lastUnresolvedCSSProperty + 1); }
};
}
#endif // %(class_name)s_h
"""
GPERF_TEMPLATE = """
%%{
%(license)s
#include "%(class_name)s.h"
#include "core/css/HashTools.h"
#include <string.h>
#include "wtf/ASCIICType.h"
#include "wtf/text/AtomicString.h"
#include "wtf/text/WTFString.h"
#ifdef _MSC_VER
// Disable the warnings from casting a 64-bit pointer to 32-bit long
// warning C4302: 'type cast': truncation from 'char (*)[28]' to 'long'
// warning C4311: 'type cast': pointer truncation from 'char (*)[18]' to 'long'
#pragma warning(disable : 4302 4311)
#endif
namespace blink {
static const char propertyNameStringsPool[] = {
%(property_name_strings)s
};
static const unsigned short propertyNameStringsOffsets[] = {
%(property_name_offsets)s
};
%%}
%%struct-type
struct Property;
%%omit-struct-type
%%language=C++
%%readonly-tables
%%global-table
%%compare-strncmp
%%define class-name %(class_name)sHash
%%define lookup-function-name findPropertyImpl
%%define hash-function-name property_hash_function
%%define slot-name nameOffset
%%define word-array-name property_word_list
%%enum
%%%%
%(property_to_enum_map)s
%%%%
const Property* findProperty(register const char* str, register unsigned int len)
{
return %(class_name)sHash::findPropertyImpl(str, len);
}
const char* getPropertyName(CSSPropertyID id)
{
ASSERT(id >= firstCSSProperty && id <= lastUnresolvedCSSProperty);
int index = id - firstCSSProperty;
return propertyNameStringsPool + propertyNameStringsOffsets[index];
}
const AtomicString& getPropertyNameAtomicString(CSSPropertyID id)
{
ASSERT(id >= firstCSSProperty && id <= lastUnresolvedCSSProperty);
int index = id - firstCSSProperty;
static AtomicString* propertyStrings = new AtomicString[lastUnresolvedCSSProperty]; // Intentionally never destroyed.
AtomicString& propertyString = propertyStrings[index];
if (propertyString.isNull()) {
const char* propertyName = propertyNameStringsPool + propertyNameStringsOffsets[index];
propertyString = AtomicString(propertyName, strlen(propertyName), AtomicString::ConstructFromLiteral);
}
return propertyString;
}
String getPropertyNameString(CSSPropertyID id)
{
// We share the StringImpl with the AtomicStrings.
return getPropertyNameAtomicString(id).string();
}
String getJSPropertyName(CSSPropertyID id)
{
char result[maxCSSPropertyNameLength + 1];
const char* cssPropertyName = getPropertyName(id);
const char* propertyNamePointer = cssPropertyName;
if (!propertyNamePointer)
return emptyString();
char* resultPointer = result;
while (char character = *propertyNamePointer++) {
if (character == '-') {
char nextCharacter = *propertyNamePointer++;
if (!nextCharacter)
break;
character = (propertyNamePointer - 2 != cssPropertyName) ? toASCIIUpper(nextCharacter) : nextCharacter;
}
*resultPointer++ = character;
}
*resultPointer = '\\0';
return String(result);
}
CSSPropertyID cssPropertyID(const String& string)
{
return resolveCSSPropertyID(unresolvedCSSPropertyID(string));
}
} // namespace blink
"""
class CSSPropertyNamesWriter(css_properties.CSSProperties):
class_name = "CSSPropertyNames"
def __init__(self, in_file_path):
super(CSSPropertyNamesWriter, self).__init__(in_file_path)
self._outputs = {(self.class_name + ".h"): self.generate_header,
(self.class_name + ".cpp"): self.generate_implementation,
}
def _enum_declaration(self, property):
return " %(property_id)s = %(enum_value)s," % property
def generate_header(self):
return HEADER_TEMPLATE % {
'license': license.license_for_generated_cpp(),
'class_name': self.class_name,
'property_enums': "\n".join(map(self._enum_declaration, self._properties_including_aliases)),
'first_property_id': self._first_enum_value,
'properties_count': len(self._properties),
'last_property_id': self._first_enum_value + len(self._properties) - 1,
'last_unresolved_property_id': max(property["enum_value"] for property in self._properties_including_aliases),
'max_name_length': max(map(len, self._properties)),
}
def generate_implementation(self):
enum_value_to_name = {property['enum_value']: property['name'] for property in self._properties_including_aliases}
property_offsets = []
property_names = []
current_offset = 0
for enum_value in range(self._first_enum_value, max(enum_value_to_name) + 1):
property_offsets.append(current_offset)
if enum_value in enum_value_to_name:
name = enum_value_to_name[enum_value]
property_names.append(name)
current_offset += len(name) + 1
css_name_and_enum_pairs = [(property['name'], property['property_id']) for property in self._properties_including_aliases]
gperf_input = GPERF_TEMPLATE % {
'license': license.license_for_generated_cpp(),
'class_name': self.class_name,
'property_name_strings': '\n'.join(' "%s\\0"' % name for name in property_names),
'property_name_offsets': '\n'.join(' %d,' % offset for offset in property_offsets),
'property_to_enum_map': '\n'.join('%s, %s' % property for property in css_name_and_enum_pairs),
}
# 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)