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"""
Provides helper functionality specificially for Qt C++/QML code generators
"""
import qface.idl.domain as domain
from jinja2 import environmentfilter
def upper_first(s):
s = str(s)
return s[0].upper() + s[1:]
class Filters(object):
"""provides a set of filters to be used with the template engine"""
classPrefix = ''
@staticmethod
def className(symbol):
classPrefix = Filters.classPrefix
return '{0}{1}'.format(classPrefix, symbol.name)
@staticmethod
def defaultValue(symbol):
prefix = Filters.classPrefix
t = symbol.type
if t.is_primitive:
if t.is_int:
return 'int(0)'
if t.is_bool:
return 'bool(false)'
if t.is_string:
return 'QString()'
if t.is_real:
return 'qreal(0.0)'
if t.is_var:
return 'QVariant()'
elif t.is_void:
return ''
elif t.is_enumeration:
value = next(iter(t.reference.members))
return '{0}::{0}Enum::{1}'.format(symbol.type, value)
elif symbol.kind == 'enum':
value = next(iter(symbol.members))
return '{0}::{1}'.format(symbol, value)
elif t.is_flag:
return '0'
elif t.is_list:
nested = Filters.returnType(t.nested)
return 'QVariantList()'.format(nested)
elif t.is_struct:
return '{0}{1}()'.format(prefix, t)
elif t.is_model:
return 'nullptr'
elif t.is_interface:
return 'nullptr'
raise Exception("Unknown symbol type" + repr(symbol))
@staticmethod
def parameterType(symbol):
prefix = Filters.classPrefix
if symbol.type.is_enumeration:
return '{0}::{0}Enum {1}'.format(symbol.type, symbol)
if symbol.type.is_void or symbol.type.is_primitive:
if symbol.type.is_string:
return 'const QString &{0}'.format(symbol)
if symbol.type.is_var:
return 'const QVariant &{0}'.format(symbol)
if symbol.type.is_real:
return 'qreal {0}'.format(symbol)
if symbol.type.is_bool:
return 'bool {0}'.format(symbol)
if symbol.type.is_int:
return 'int {0}'.format(symbol)
return '{0} {1}'.format(symbol.type, symbol)
elif symbol.type.is_list:
nested = Filters.returnType(symbol.type.nested)
return 'const QVariantList& {1}'.format(nested, symbol)
elif symbol.type.is_model:
return 'QAbstractItemModel* {0}'.format(symbol)
elif symbol.type.is_complex:
if symbol.type.is_interface:
return '{0}Base *{1}'.format(symbol.type, symbol)
else:
return 'const {0}{1} &{2}'.format(prefix, symbol.type, symbol)
raise Exception("Unknown symbol type")
@staticmethod
def returnType(symbol):
prefix = Filters.classPrefix
t = symbol.type
if t.is_enumeration:
return '{0}::{0}Enum'.format(symbol.type)
if symbol.type.is_void or symbol.type.is_primitive:
if t.is_string:
return 'QString'
if t.is_var:
return 'QVariant'
if t.is_real:
return 'qreal'
if t.is_int:
return 'int'
if t.is_bool:
return 'bool'
if t.is_void:
return 'void'
print(t)
assert False
elif symbol.type.is_list:
nested = Filters.returnType(symbol.type.nested)
return 'QVariantList'.format(nested)
elif symbol.type.is_model:
return 'QAbstractItemModel* '
elif symbol.type.is_complex:
if symbol.type.is_interface:
return '{0}Base *'.format(symbol.type)
else:
return '{0}{1}'.format(prefix, symbol.type)
raise Exception("Unknown symbol type")
@staticmethod
def header_dependencies(symbol):
types = symbol.dependencies
lines = []
for t in types:
if t.is_primitive:
continue
if t.is_interface:
lines.append('class {0};'.format(t))
if t.is_struct:
lines.append('#include "{0}.h"'.format(t))
return "\n".join(lines)
@staticmethod
def source_dependencies(symbol):
types = symbol.dependencies
lines = []
module_name = symbol.module.module_name
if not symbol.kind == 'module':
lines.append('#include "{0}module.h"'.format(module_name.lower()))
for t in types:
if t.is_primitive:
continue
if t.is_interface:
lines.append('#include "{0}.h"'.format(t.name.lower()))
return "\n".join(lines)
@staticmethod
def open_ns(symbol):
''' generates a open namespace from symbol namespace x { y { z {'''
blocks = ['namespace {0} {{'.format(x) for x in symbol.module.name_parts]
return ' '.join(blocks)
@staticmethod
def close_ns(symbol):
'''generates a closing names statement from a symbol'''
closing = ' '.join(['}' for x in symbol.module.name_parts])
name = '::'.join(symbol.module.name_parts)
return '{0} // namespace {1}'.format(closing, name)
@staticmethod
def using_ns(symbol):
'''generates a using namespace x::y::z statement from a symbol'''
id = '::'.join(symbol.module.name_parts)
return 'using namespace {0};'.format(id)
@staticmethod
def ns(symbol):
'''generates a namespace x::y::z statement from a symbol'''
if symbol.type and symbol.type.is_primitive:
return ''
return '{0}::'.format('::'.join(symbol.module.name_parts))
@staticmethod
def fqn(symbol):
'''generates a fully qualified name from symbol'''
return '{0}::{1}'.format(Filters.ns(symbol), symbol.name)
@staticmethod
def signalName(s):
if isinstance(s, domain.Property):
return '{0}Changed'.format(s)
return s
@staticmethod
@environmentfilter
def parameters(env, s, filter=None, spaces=True):
if not filter:
filter = Filters.parameterType
elif isinstance(filter, str):
filter = env.filters[filter]
args = []
indent = ', '
if not spaces:
indent = ','
if isinstance(s, domain.Operation):
args = s.parameters
elif isinstance(s, domain.Signal):
args = s.parameters
elif isinstance(s, domain.Struct):
args = s.fields
elif isinstance(s, domain.Property):
args = [s]
return indent.join([filter(a) for a in args])
@staticmethod
@environmentfilter
def signature(env, s, expand=False, filter=None):
if not filter:
filter = Filters.returnType
elif isinstance(filter, str):
filter = env.filters[filter]
if isinstance(s, domain.Operation):
args = s.parameters
elif isinstance(s, domain.Signal):
args = s.parameters
elif isinstance(s, domain.Property):
args = [s] # for <property>Changed(<type>)
elif isinstance(s, domain.Struct):
args = s.fields
else:
args = []
if expand:
return ', '.join(['{0} {1}'.format(filter(a), a.name) for a in args])
return ','.join([filter(a) for a in args])
@staticmethod
def identifier(s):
return str(s).lower().replace('.', '_')
@staticmethod
def path(s):
return str(s).replace('.', '/')
@staticmethod
def get_filters():
return {
'qt.defaultValue': Filters.defaultValue,
'qt.returnType': Filters.returnType,
'qt.parameterType': Filters.parameterType,
'qt.open_ns': Filters.open_ns,
'qt.close_ns': Filters.close_ns,
'qt.using_ns': Filters.using_ns,
'qt.ns': Filters.ns,
'qt.fqn': Filters.fqn,
'qt.signalName': Filters.signalName,
'qt.parameters': Filters.parameters,
'qt.signature': Filters.signature,
'qt.identifier': Filters.identifier,
'qt.path': Filters.path,
'qt.className': Filters.className,
'qt.source_dependencies': Filters.source_dependencies,
'qt.header_dependencies': Filters.header_dependencies,
}
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