/usr/lib/python2.7/dist-packages/IPython/qt/console/pygments_highlighter.py is in ipython-qtconsole 1.2.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 | # System library imports.
from IPython.external.qt import QtGui
from pygments.formatters.html import HtmlFormatter
from pygments.lexer import RegexLexer, _TokenType, Text, Error
from pygments.lexers import PythonLexer
from pygments.styles import get_style_by_name
def get_tokens_unprocessed(self, text, stack=('root',)):
""" Split ``text`` into (tokentype, text) pairs.
Monkeypatched to store the final stack on the object itself.
"""
pos = 0
tokendefs = self._tokens
if hasattr(self, '_saved_state_stack'):
statestack = list(self._saved_state_stack)
else:
statestack = list(stack)
statetokens = tokendefs[statestack[-1]]
while 1:
for rexmatch, action, new_state in statetokens:
m = rexmatch(text, pos)
if m:
if type(action) is _TokenType:
yield pos, action, m.group()
else:
for item in action(self, m):
yield item
pos = m.end()
if new_state is not None:
# state transition
if isinstance(new_state, tuple):
for state in new_state:
if state == '#pop':
statestack.pop()
elif state == '#push':
statestack.append(statestack[-1])
else:
statestack.append(state)
elif isinstance(new_state, int):
# pop
del statestack[new_state:]
elif new_state == '#push':
statestack.append(statestack[-1])
else:
assert False, "wrong state def: %r" % new_state
statetokens = tokendefs[statestack[-1]]
break
else:
try:
if text[pos] == '\n':
# at EOL, reset state to "root"
pos += 1
statestack = ['root']
statetokens = tokendefs['root']
yield pos, Text, u'\n'
continue
yield pos, Error, text[pos]
pos += 1
except IndexError:
break
self._saved_state_stack = list(statestack)
# Monkeypatch!
RegexLexer.get_tokens_unprocessed = get_tokens_unprocessed
class PygmentsBlockUserData(QtGui.QTextBlockUserData):
""" Storage for the user data associated with each line.
"""
syntax_stack = ('root',)
def __init__(self, **kwds):
for key, value in kwds.iteritems():
setattr(self, key, value)
QtGui.QTextBlockUserData.__init__(self)
def __repr__(self):
attrs = ['syntax_stack']
kwds = ', '.join([ '%s=%r' % (attr, getattr(self, attr))
for attr in attrs ])
return 'PygmentsBlockUserData(%s)' % kwds
class PygmentsHighlighter(QtGui.QSyntaxHighlighter):
""" Syntax highlighter that uses Pygments for parsing. """
#---------------------------------------------------------------------------
# 'QSyntaxHighlighter' interface
#---------------------------------------------------------------------------
def __init__(self, parent, lexer=None):
super(PygmentsHighlighter, self).__init__(parent)
self._document = self.document()
self._formatter = HtmlFormatter(nowrap=True)
self._lexer = lexer if lexer else PythonLexer()
self.set_style('default')
def highlightBlock(self, string):
""" Highlight a block of text.
"""
prev_data = self.currentBlock().previous().userData()
if prev_data is not None:
self._lexer._saved_state_stack = prev_data.syntax_stack
elif hasattr(self._lexer, '_saved_state_stack'):
del self._lexer._saved_state_stack
# Lex the text using Pygments
index = 0
for token, text in self._lexer.get_tokens(string):
length = len(text)
self.setFormat(index, length, self._get_format(token))
index += length
if hasattr(self._lexer, '_saved_state_stack'):
data = PygmentsBlockUserData(
syntax_stack=self._lexer._saved_state_stack)
self.currentBlock().setUserData(data)
# Clean up for the next go-round.
del self._lexer._saved_state_stack
#---------------------------------------------------------------------------
# 'PygmentsHighlighter' interface
#---------------------------------------------------------------------------
def set_style(self, style):
""" Sets the style to the specified Pygments style.
"""
if isinstance(style, basestring):
style = get_style_by_name(style)
self._style = style
self._clear_caches()
def set_style_sheet(self, stylesheet):
""" Sets a CSS stylesheet. The classes in the stylesheet should
correspond to those generated by:
pygmentize -S <style> -f html
Note that 'set_style' and 'set_style_sheet' completely override each
other, i.e. they cannot be used in conjunction.
"""
self._document.setDefaultStyleSheet(stylesheet)
self._style = None
self._clear_caches()
#---------------------------------------------------------------------------
# Protected interface
#---------------------------------------------------------------------------
def _clear_caches(self):
""" Clear caches for brushes and formats.
"""
self._brushes = {}
self._formats = {}
def _get_format(self, token):
""" Returns a QTextCharFormat for token or None.
"""
if token in self._formats:
return self._formats[token]
if self._style is None:
result = self._get_format_from_document(token, self._document)
else:
result = self._get_format_from_style(token, self._style)
self._formats[token] = result
return result
def _get_format_from_document(self, token, document):
""" Returns a QTextCharFormat for token by
"""
code, html = next(self._formatter._format_lines([(token, u'dummy')]))
self._document.setHtml(html)
return QtGui.QTextCursor(self._document).charFormat()
def _get_format_from_style(self, token, style):
""" Returns a QTextCharFormat for token by reading a Pygments style.
"""
result = QtGui.QTextCharFormat()
for key, value in style.style_for_token(token).items():
if value:
if key == 'color':
result.setForeground(self._get_brush(value))
elif key == 'bgcolor':
result.setBackground(self._get_brush(value))
elif key == 'bold':
result.setFontWeight(QtGui.QFont.Bold)
elif key == 'italic':
result.setFontItalic(True)
elif key == 'underline':
result.setUnderlineStyle(
QtGui.QTextCharFormat.SingleUnderline)
elif key == 'sans':
result.setFontStyleHint(QtGui.QFont.SansSerif)
elif key == 'roman':
result.setFontStyleHint(QtGui.QFont.Times)
elif key == 'mono':
result.setFontStyleHint(QtGui.QFont.TypeWriter)
return result
def _get_brush(self, color):
""" Returns a brush for the color.
"""
result = self._brushes.get(color)
if result is None:
qcolor = self._get_color(color)
result = QtGui.QBrush(qcolor)
self._brushes[color] = result
return result
def _get_color(self, color):
""" Returns a QColor built from a Pygments color string.
"""
qcolor = QtGui.QColor()
qcolor.setRgb(int(color[:2], base=16),
int(color[2:4], base=16),
int(color[4:6], base=16))
return qcolor
|