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|
"""
This module contains a native python syntax highlighter, strongly inspired from
spyderlib.widgets.source_code.syntax_higlighter.PythonSH but modified to
highlight docstrings with a different color than the string color and to
highlight decorators and self parameters.
It is approximately 3 time faster then :class:`pyqode.core.modes.PygmentsSH`.
"""
try:
#it works on windows
import builtins
except ImportError:
#it works on osx
builtins = __import__('__builtin__')
import re
from pyqode.core.api import SyntaxHighlighter as BaseSH
from pyqode.core.api import TextBlockHelper
def any(name, alternates):
"""Return a named group pattern matching list of alternates."""
return "(?P<%s>" % name + "|".join(alternates) + ")"
kwlist = [
'self',
'False',
'None',
'True',
'assert',
'break',
'class',
'continue',
'def',
'del',
'elif',
'else',
'except',
'finally',
'for',
'global',
'if',
'lambda',
'nonlocal',
'pass',
'raise',
'return',
'try',
'while',
'with',
'yield',
]
kw_namespace_list = ['from', 'import', 'as']
wordop_list = ['and', 'or', 'not', 'in', 'is']
def make_python_patterns(additional_keywords=[], additional_builtins=[]):
"""Strongly inspired from idlelib.ColorDelegator.make_pat"""
kw = r"\b" + any("keyword", kwlist + additional_keywords) + r"\b"
kw_namespace = r"\b" + any("namespace", kw_namespace_list) + r"\b"
word_operators = r"\b" + any("operator_word", wordop_list) + r"\b"
builtinlist = [str(name) for name in dir(builtins)
if not name.startswith('_')] + additional_builtins
for v in ['None', 'True', 'False']:
builtinlist.remove(v)
builtin = r"([^.'\"\\#]\b|^)" + any("builtin", builtinlist) + r"\b"
builtin_fct = any("builtin_fct", [r'_{2}[a-zA-Z_]*_{2}'])
comment = any("comment", [r"#[^\n]*"])
instance = any("instance", [r"\bself\b", r"\bcls\b"])
decorator = any('decorator', [r'@\w*', r'.setter'])
number = any("number",
[r"\b[+-]?[0-9]+[lLjJ]?\b",
r"\b[+-]?0[xX][0-9A-Fa-f]+[lL]?\b",
r"\b[+-]?0[oO][0-7]+[lL]?\b",
r"\b[+-]?0[bB][01]+[lL]?\b",
r"\b[+-]?[0-9]+(?:\.[0-9]+)?(?:[eE][+-]?[0-9]+)?[jJ]?\b"])
sqstring = r"(\b[rRuU])?'[^'\\\n]*(\\.[^'\\\n]*)*'?"
dqstring = r'(\b[rRuU])?"[^"\\\n]*(\\.[^"\\\n]*)*"?'
uf_sqstring = r"(\b[rRuU])?'[^'\\\n]*(\\.[^'\\\n]*)*(\\)$(?!')$"
uf_dqstring = r'(\b[rRuU])?"[^"\\\n]*(\\.[^"\\\n]*)*(\\)$(?!")$'
sq3string = r"(\b[rRuU])?'''[^'\\]*((\\.|'(?!''))[^'\\]*)*(''')?"
dq3string = r'(\b[rRuU])?"""[^"\\]*((\\.|"(?!""))[^"\\]*)*(""")?'
uf_sq3string = r"(\b[rRuU])?'''[^'\\]*((\\.|'(?!''))[^'\\]*)*(\\)?(?!''')$"
uf_dq3string = r'(\b[rRuU])?"""[^"\\]*((\\.|"(?!""))[^"\\]*)*(\\)?(?!""")$'
string = any("string", [sq3string, dq3string, sqstring, dqstring])
ufstring1 = any("uf_sqstring", [uf_sqstring])
ufstring2 = any("uf_dqstring", [uf_dqstring])
ufstring3 = any("uf_sq3string", [uf_sq3string])
ufstring4 = any("uf_dq3string", [uf_dq3string])
return "|".join([instance, decorator, kw, kw_namespace, builtin,
word_operators, builtin_fct, comment,
ufstring1, ufstring2, ufstring3, ufstring4, string,
number, any("SYNC", [r"\n"])])
#
# Pygments Syntax highlighter
#
class PythonSH(BaseSH):
"""
Highlights python syntax in the editor.
"""
mimetype = 'text/x-python'
# Syntax highlighting rules:
PROG = re.compile(make_python_patterns(), re.S)
IDPROG = re.compile(r"\s+(\w+)", re.S)
ASPROG = re.compile(r".*?\b(as)\b")
# Syntax highlighting states (from one text block to another):
(NORMAL, INSIDE_SQ3STRING, INSIDE_DQ3STRING,
INSIDE_SQSTRING, INSIDE_DQSTRING) = list(range(5))
# Comments suitable for Outline Explorer
OECOMMENT = re.compile('^(# ?--[-]+|##[#]+ )[ -]*[^- ]+')
def __init__(self, parent, color_scheme=None):
super(PythonSH, self).__init__(parent, color_scheme)
self.import_statements = []
self.global_import_statements = []
self.docstrings = []
def highlight_block(self, text, block):
prev_block = block.previous()
prev_state = TextBlockHelper.get_state(prev_block)
if prev_state == self.INSIDE_DQ3STRING:
offset = -4
text = r'""" ' + text
elif prev_state == self.INSIDE_SQ3STRING:
offset = -4
text = r"''' " + text
elif prev_state == self.INSIDE_DQSTRING:
offset = -2
text = r'" ' + text
elif prev_state == self.INSIDE_SQSTRING:
offset = -2
text = r"' " + text
else:
offset = 0
import_stmt = None
# set docstring dynamic attribute, used by the fold detector.
block.docstring = False
self.setFormat(0, len(text), self.formats["normal"])
state = self.NORMAL
match = self.PROG.search(text)
while match:
for key, value in list(match.groupdict().items()):
if value:
start, end = match.span(key)
start = max([0, start + offset])
end = max([0, end + offset])
if key == "uf_sq3string":
self.setFormat(start, end - start,
self.formats["docstring"])
block.docstring = True
state = self.INSIDE_SQ3STRING
elif key == "uf_dq3string":
self.setFormat(start, end - start,
self.formats["docstring"])
block.docstring = True
state = self.INSIDE_DQ3STRING
elif key == "uf_sqstring":
self.setFormat(start, end - start,
self.formats["string"])
state = self.INSIDE_SQSTRING
elif key == "uf_dqstring":
self.setFormat(start, end - start,
self.formats["string"])
state = self.INSIDE_DQSTRING
elif key == 'builtin_fct':
# trick to highlight __init__, __add__ and so on with
# builtin color
self.setFormat(start, end - start,
self.formats["constant"])
else:
if ('"""' in value or "'''" in value) and \
key != 'comment':
# highlight docstring with a different color
block.docstring = True
self.setFormat(start, end - start,
self.formats["docstring"])
elif key == 'decorator':
# highlight decorators
self.setFormat(start, end - start,
self.formats["decorator"])
elif value in ['self', 'cls']:
# highlight self attribute
self.setFormat(start, end - start,
self.formats["self"])
else:
# highlight all other tokens
self.setFormat(start, end - start,
self.formats[key])
if key == "keyword":
if value in ("def", "class"):
match1 = self.IDPROG.match(text, end)
if match1:
start1, end1 = match1.span(1)
fmt_key = ('definition' if value == 'class'
else 'function')
fmt = self.formats[fmt_key]
self.setFormat(start1, end1 - start1, fmt)
if key == 'namespace':
import_stmt = text.strip()
# color all the "as" words on same line, except
# if in a comment; cheap approximation to the
# truth
if '#' in text:
endpos = text.index('#')
else:
endpos = len(text)
while True:
match1 = self.ASPROG.match(text, end,
endpos)
if not match1:
break
start, end = match1.span(1)
self.setFormat(start, end - start,
self.formats["namespace"])
# next match
match = self.PROG.search(text, match.end())
TextBlockHelper.set_state(block, state)
# update import zone
if import_stmt is not None:
block.import_stmt = import_stmt
self.import_statements.append(block)
block.import_stmt = True
elif block.docstring:
self.docstrings.append(block)
def rehighlight(self):
self.import_statements[:] = []
self.global_import_statements[:] = []
self.docstrings[:] = []
super(PythonSH, self).rehighlight()
|
