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# lexers.py - select Qsci lexer for a filename and contents
#
# Copyright 2010 Steve Borho <steve@borho.org>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2, incorporated herein by reference.
import re
from PyQt4 import Qsci
from PyQt4.QtGui import *
from tortoisehg.hgqt import qtlib
class _LexerSelector(object):
_lexer = None
def match(self, filename, filedata):
return False
def lexer(self, parent):
"""
Return a configured instance of the lexer
"""
return self.cfg_lexer(self._lexer(parent))
def cfg_lexer(self, lexer):
font = qtlib.getfont('fontlog').font()
lexer.setFont(font, -1)
return lexer
class _FilenameLexerSelector(_LexerSelector):
"""
Base class for lexer selector based on file name matching
"""
extensions = ()
def match(self, filename, filedata):
filename = filename.lower()
for ext in self.extensions:
if filename.endswith(ext):
return True
return False
class _ScriptLexerSelector(_FilenameLexerSelector):
"""
Base class for lexer selector based on content pattern matching
"""
regex = None
headersize = 3
def match(self, filename, filedata):
if super(_ScriptLexerSelector, self).match(filename, filedata):
return True
if self.regex and filedata:
for line in filedata.splitlines()[:self.headersize]:
if len(line)<1000 and self.regex.match(line):
return True
return False
class PythonLexerSelector(_ScriptLexerSelector):
extensions = ('.py', '.pyw')
_lexer = Qsci.QsciLexerPython
regex = re.compile(r'^#[!].*python')
class BashLexerSelector(_ScriptLexerSelector):
extensions = ('.sh', '.bash')
_lexer = Qsci.QsciLexerBash
regex = re.compile(r'^#[!].*sh')
class PerlLexerSelector(_ScriptLexerSelector):
extensions = ('.pl', '.perl')
_lexer = Qsci.QsciLexerPerl
regex = re.compile(r'^#[!].*perl')
class RubyLexerSelector(_ScriptLexerSelector):
extensions = ('.rb', '.ruby')
_lexer = Qsci.QsciLexerRuby
regex = re.compile(r'^#[!].*ruby')
class LuaLexerSelector(_ScriptLexerSelector):
extensions = ('.lua', )
_lexer = Qsci.QsciLexerLua
regex = None
class CppLexerSelector(_FilenameLexerSelector):
extensions = ('.c', '.cpp', '.cxx', '.h', '.hpp', '.hxx')
_lexer = Qsci.QsciLexerCPP
class CSSLexerSelector(_FilenameLexerSelector):
extensions = ('.css',)
_lexer = Qsci.QsciLexerCSS
class XMLLexerSelector(_FilenameLexerSelector):
extensions = ('.xhtml', '.xml', '.csproj', 'app.config', 'web.config')
_lexer = Qsci.QsciLexerXML
class HTMLLexerSelector(_FilenameLexerSelector):
extensions = ('.htm', '.html')
_lexer = Qsci.QsciLexerHTML
class VerilogLexerSelector(_FilenameLexerSelector):
extensions = ('.v', '.vh')
_lexer = Qsci.QsciLexerVerilog
class VHDLLexerSelector(_FilenameLexerSelector):
extensions = ('.vhd', '.vhdl')
_lexer = Qsci.QsciLexerVHDL
class BatchLexerSelector(_FilenameLexerSelector):
extensions = ('.cmd', '.bat')
_lexer = Qsci.QsciLexerBatch
class MakeLexerSelector(_FilenameLexerSelector):
extensions = ('.mk', 'makefile')
_lexer = Qsci.QsciLexerMakefile
class SQLLexerSelector(_FilenameLexerSelector):
extensions = ('.sql',)
_lexer = Qsci.QsciLexerSQL
class JSLexerSelector(_FilenameLexerSelector):
extensions = ('.js',)
_lexer = Qsci.QsciLexerJavaScript
class JavaLexerSelector(_FilenameLexerSelector):
extensions = ('.java',)
_lexer = Qsci.QsciLexerJava
class TeXLexerSelector(_FilenameLexerSelector):
extensions = ('.tex', '.latex',)
_lexer = Qsci.QsciLexerTeX
class CSharpLexerSelector(_FilenameLexerSelector):
extensions = ('.cs')
_lexer = Qsci.QsciLexerCSharp
class DiffLexerSelector(_ScriptLexerSelector):
extensions = ()
_lexer = Qsci.QsciLexerDiff
regex = re.compile(r'^@@ [-]\d+,\d+ [+]\d+,\d+ @@$')
def cfg_lexer(self, lexer):
#lexer.setDefaultPaper(QtGui.QColor(cfg.getDiffBGColor()))
#lexer.setColor(QtGui.QColor(cfg.getDiffFGColor()), -1)
for label, i in (('diff.inserted', 6),
('diff.deleted', 5),
('diff.hunk', 4)):
effect = qtlib.geteffect(label)
for e in effect.split(';'):
if e.startswith('color:'):
lexer.setColor(QColor(e[7:]), i)
if e.startswith('background-color:'):
lexer.setEolFill(True, i)
lexer.setPaper(QColor(e[18:]), i)
font = qtlib.getfont('fontdiff').font()
lexer.setFont(font, -1)
return lexer
lexers = []
for clsname, cls in globals().items():
if clsname.startswith('_'):
continue
if isinstance(cls, type) and issubclass(cls, _LexerSelector):
#print clsname
lexers.append(cls())
def get_diff_lexer(parent):
return DiffLexerSelector().lexer(parent)
def get_lexer(filename, filedata, parent):
for lselector in lexers:
if lselector.match(filename, filedata):
return lselector.lexer(parent)
return None
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