/usr/share/pyshared/debug_toolbar/utils/sqlparse/filters.py is in python-django-debug-toolbar 1:0+git201107220111-96e46c6-1.
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import re
from debug_toolbar.utils.sqlparse.engine import grouping
from debug_toolbar.utils.sqlparse import tokens as T
from debug_toolbar.utils.sqlparse import sql
class Filter(object):
def process(self, *args):
raise NotImplementedError
class TokenFilter(Filter):
def process(self, stack, stream):
raise NotImplementedError
# FIXME: Should be removed
def rstrip(stream):
buff = []
for token in stream:
if token.is_whitespace() and '\n' in token.value:
# assuming there's only one \n in value
before, rest = token.value.split('\n', 1)
token.value = '\n%s' % rest
buff = []
yield token
elif token.is_whitespace():
buff.append(token)
elif token.is_group():
token.tokens = list(rstrip(token.tokens))
# process group and look if it starts with a nl
if token.tokens and token.tokens[0].is_whitespace():
before, rest = token.tokens[0].value.split('\n', 1)
token.tokens[0].value = '\n%s' % rest
buff = []
while buff:
yield buff.pop(0)
yield token
else:
while buff:
yield buff.pop(0)
yield token
# --------------------------
# token process
class _CaseFilter(TokenFilter):
ttype = None
def __init__(self, case=None):
if case is None:
case = 'upper'
assert case in ['lower', 'upper', 'capitalize']
self.convert = getattr(unicode, case)
def process(self, stack, stream):
for ttype, value in stream:
if ttype in self.ttype:
value = self.convert(value)
yield ttype, value
class KeywordCaseFilter(_CaseFilter):
ttype = T.Keyword
class IdentifierCaseFilter(_CaseFilter):
ttype = (T.Name, T.String.Symbol)
# ----------------------
# statement process
class StripCommentsFilter(Filter):
def _process(self, tlist):
idx = 0
clss = set([x.__class__ for x in tlist.tokens])
while grouping.Comment in clss:
token = tlist.token_next_by_instance(0, grouping.Comment)
tidx = tlist.token_index(token)
prev = tlist.token_prev(tidx, False)
next_ = tlist.token_next(tidx, False)
# Replace by whitespace if prev and next exist and if they're not
# whitespaces. This doesn't apply if prev or next is a paranthesis.
if (prev is not None and next_ is not None
and not prev.is_whitespace() and not next_.is_whitespace()
and not (prev.match(T.Punctuation, '(')
or next_.match(T.Punctuation, ')'))):
tlist.tokens[tidx] = grouping.Token(T.Whitespace, ' ')
else:
tlist.tokens.pop(tidx)
clss = set([x.__class__ for x in tlist.tokens])
def process(self, stack, stmt):
[self.process(stack, sgroup) for sgroup in stmt.get_sublists()]
self._process(stmt)
class StripWhitespaceFilter(Filter):
def _stripws(self, tlist):
func_name = '_stripws_%s' % tlist.__class__.__name__.lower()
func = getattr(self, func_name, self._stripws_default)
func(tlist)
def _stripws_default(self, tlist):
last_was_ws = False
for token in tlist.tokens:
if token.is_whitespace():
if last_was_ws:
token.value = ''
else:
token.value = ' '
last_was_ws = token.is_whitespace()
def _stripws_parenthesis(self, tlist):
if tlist.tokens[1].is_whitespace():
tlist.tokens.pop(1)
if tlist.tokens[-2].is_whitespace():
tlist.tokens.pop(-2)
self._stripws_default(tlist)
def process(self, stack, stmt):
[self.process(stack, sgroup) for sgroup in stmt.get_sublists()]
self._stripws(stmt)
if stmt.tokens[-1].is_whitespace():
stmt.tokens.pop(-1)
class ReindentFilter(Filter):
def __init__(self, width=2, char=' ', line_width=None):
self.width = width
self.char = char
self.indent = 0
self.offset = 0
self.line_width = line_width
self._curr_stmt = None
self._last_stmt = None
def _get_offset(self, token):
all_ = list(self._curr_stmt.flatten())
idx = all_.index(token)
raw = ''.join(unicode(x) for x in all_[:idx+1])
line = raw.splitlines()[-1]
# Now take current offset into account and return relative offset.
full_offset = len(line)-(len(self.char*(self.width*self.indent)))
return full_offset - self.offset
def nl(self):
# TODO: newline character should be configurable
ws = '\n'+(self.char*((self.indent*self.width)+self.offset))
return grouping.Token(T.Whitespace, ws)
def _split_kwds(self, tlist):
split_words = ('FROM', 'JOIN$', 'AND', 'OR',
'GROUP', 'ORDER', 'UNION', 'VALUES',
'SET')
idx = 0
token = tlist.token_next_match(idx, T.Keyword, split_words,
regex=True)
while token:
prev = tlist.token_prev(tlist.token_index(token), False)
offset = 1
if prev and prev.is_whitespace():
tlist.tokens.pop(tlist.token_index(prev))
offset += 1
if (prev
and isinstance(prev, sql.Comment)
and (str(prev).endswith('\n')
or str(prev).endswith('\r'))):
nl = tlist.token_next(token)
else:
nl = self.nl()
tlist.insert_before(token, nl)
token = tlist.token_next_match(tlist.token_index(nl)+offset,
T.Keyword, split_words, regex=True)
def _split_statements(self, tlist):
idx = 0
token = tlist.token_next_by_type(idx, (T.Keyword.DDL, T.Keyword.DML))
while token:
prev = tlist.token_prev(tlist.token_index(token), False)
if prev and prev.is_whitespace():
tlist.tokens.pop(tlist.token_index(prev))
# only break if it's not the first token
if prev:
nl = self.nl()
tlist.insert_before(token, nl)
token = tlist.token_next_by_type(tlist.token_index(token)+1,
(T.Keyword.DDL, T.Keyword.DML))
def _process(self, tlist):
func_name = '_process_%s' % tlist.__class__.__name__.lower()
func = getattr(self, func_name, self._process_default)
func(tlist)
def _process_where(self, tlist):
token = tlist.token_next_match(0, T.Keyword, 'WHERE')
tlist.insert_before(token, self.nl())
self.indent += 1
self._process_default(tlist)
self.indent -= 1
def _process_parenthesis(self, tlist):
first = tlist.token_next(0)
indented = False
if first and first.ttype in (T.Keyword.DML, T.Keyword.DDL):
self.indent += 1
tlist.tokens.insert(0, self.nl())
indented = True
num_offset = self._get_offset(tlist.token_next_match(0,
T.Punctuation, '('))
self.offset += num_offset
self._process_default(tlist, stmts=not indented)
if indented:
self.indent -= 1
self.offset -= num_offset
def _process_identifierlist(self, tlist):
identifiers = tlist.get_identifiers()
if len(identifiers) > 1:
first = list(identifiers[0].flatten())[0]
num_offset = self._get_offset(first)-len(first.value)
self.offset += num_offset
for token in identifiers[1:]:
tlist.insert_before(token, self.nl())
self.offset -= num_offset
self._process_default(tlist)
def _process_case(self, tlist):
cases = tlist.get_cases()
is_first = True
num_offset = None
case = tlist.tokens[0]
outer_offset = self._get_offset(case)-len(case.value)
self.offset += outer_offset
for cond, value in tlist.get_cases():
if is_first:
is_first = False
num_offset = self._get_offset(cond[0])-len(cond[0].value)
self.offset += num_offset
continue
if cond is None:
token = value[0]
else:
token = cond[0]
tlist.insert_before(token, self.nl())
# Line breaks on group level are done. Now let's add an offset of
# 5 (=length of "when", "then", "else") and process subgroups.
self.offset += 5
self._process_default(tlist)
self.offset -= 5
if num_offset is not None:
self.offset -= num_offset
end = tlist.token_next_match(0, T.Keyword, 'END')
tlist.insert_before(end, self.nl())
self.offset -= outer_offset
def _process_default(self, tlist, stmts=True, kwds=True):
if stmts:
self._split_statements(tlist)
if kwds:
self._split_kwds(tlist)
[self._process(sgroup) for sgroup in tlist.get_sublists()]
def process(self, stack, stmt):
if isinstance(stmt, grouping.Statement):
self._curr_stmt = stmt
self._process(stmt)
if isinstance(stmt, grouping.Statement):
if self._last_stmt is not None:
if self._last_stmt.to_unicode().endswith('\n'):
nl = '\n'
else:
nl = '\n\n'
stmt.tokens.insert(0,
grouping.Token(T.Whitespace, nl))
if self._last_stmt != stmt:
self._last_stmt = stmt
# FIXME: Doesn't work ;)
class RightMarginFilter(Filter):
keep_together = (
# grouping.TypeCast, grouping.Identifier, grouping.Alias,
)
def __init__(self, width=79):
self.width = width
self.line = ''
def _process(self, stack, group, stream):
for token in stream:
if token.is_whitespace() and '\n' in token.value:
if token.value.endswith('\n'):
self.line = ''
else:
self.line = token.value.splitlines()[-1]
elif (token.is_group()
and not token.__class__ in self.keep_together):
token.tokens = self._process(stack, token, token.tokens)
else:
val = token.to_unicode()
if len(self.line) + len(val) > self.width:
match = re.search('^ +', self.line)
if match is not None:
indent = match.group()
else:
indent = ''
yield grouping.Token(T.Whitespace, '\n%s' % indent)
self.line = indent
self.line += val
yield token
def process(self, stack, group):
return
group.tokens = self._process(stack, group, group.tokens)
# ---------------------------
# postprocess
class SerializerUnicode(Filter):
def process(self, stack, stmt):
raw = stmt.to_unicode()
add_nl = raw.endswith('\n')
res = '\n'.join(line.rstrip() for line in raw.splitlines())
if add_nl:
res += '\n'
return res
class OutputPythonFilter(Filter):
def __init__(self, varname='sql'):
self.varname = varname
self.cnt = 0
def _process(self, stream, varname, count, has_nl):
if count > 1:
yield grouping.Token(T.Whitespace, '\n')
yield grouping.Token(T.Name, varname)
yield grouping.Token(T.Whitespace, ' ')
yield grouping.Token(T.Operator, '=')
yield grouping.Token(T.Whitespace, ' ')
if has_nl:
yield grouping.Token(T.Operator, '(')
yield grouping.Token(T.Text, "'")
cnt = 0
for token in stream:
cnt += 1
if token.is_whitespace() and '\n' in token.value:
if cnt == 1:
continue
after_lb = token.value.split('\n', 1)[1]
yield grouping.Token(T.Text, " '")
yield grouping.Token(T.Whitespace, '\n')
for i in range(len(varname)+4):
yield grouping.Token(T.Whitespace, ' ')
yield grouping.Token(T.Text, "'")
if after_lb: # it's the indendation
yield grouping.Token(T.Whitespace, after_lb)
continue
elif token.value and "'" in token.value:
token.value = token.value.replace("'", "\\'")
yield grouping.Token(T.Text, token.value or '')
yield grouping.Token(T.Text, "'")
if has_nl:
yield grouping.Token(T.Operator, ')')
def process(self, stack, stmt):
self.cnt += 1
if self.cnt > 1:
varname = '%s%d' % (self.varname, self.cnt)
else:
varname = self.varname
has_nl = len(stmt.to_unicode().strip().splitlines()) > 1
stmt.tokens = self._process(stmt.tokens, varname, self.cnt, has_nl)
return stmt
class OutputPHPFilter(Filter):
def __init__(self, varname='sql'):
self.varname = '$%s' % varname
self.count = 0
def _process(self, stream, varname):
if self.count > 1:
yield grouping.Token(T.Whitespace, '\n')
yield grouping.Token(T.Name, varname)
yield grouping.Token(T.Whitespace, ' ')
yield grouping.Token(T.Operator, '=')
yield grouping.Token(T.Whitespace, ' ')
yield grouping.Token(T.Text, '"')
cnt = 0
for token in stream:
if token.is_whitespace() and '\n' in token.value:
# cnt += 1
# if cnt == 1:
# continue
after_lb = token.value.split('\n', 1)[1]
yield grouping.Token(T.Text, ' "')
yield grouping.Token(T.Operator, ';')
yield grouping.Token(T.Whitespace, '\n')
yield grouping.Token(T.Name, varname)
yield grouping.Token(T.Whitespace, ' ')
yield grouping.Token(T.Punctuation, '.')
yield grouping.Token(T.Operator, '=')
yield grouping.Token(T.Whitespace, ' ')
yield grouping.Token(T.Text, '"')
if after_lb:
yield grouping.Token(T.Text, after_lb)
continue
elif '"' in token.value:
token.value = token.value.replace('"', '\\"')
yield grouping.Token(T.Text, token.value)
yield grouping.Token(T.Text, '"')
yield grouping.Token(T.Punctuation, ';')
def process(self, stack, stmt):
self.count += 1
if self.count > 1:
varname = '%s%d' % (self.varname, self.count)
else:
varname = self.varname
stmt.tokens = tuple(self._process(stmt.tokens, varname))
return stmt
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