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# -*- coding: iso-8859-1 -*-
# Copyright (C) 2011-2014 Bastian Kleineidam
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
from PyQt4 import QtCore, QtGui
def format (color, style=''):
"""Return a QTextCharFormat with the given attributes."""
format = QtGui.QTextCharFormat()
format.setForeground(getattr(QtCore.Qt, color))
if 'bold' in style:
format.setFontWeight(QtGui.QFont.Bold)
if 'italic' in style:
format.setFontItalic(True)
return format
class Highlighter (QtGui.QSyntaxHighlighter):
"""Base class for all highlighters."""
def __init__ (self, document):
"""Initialize rules and styles."""
super(Highlighter, self).__init__(document)
self.rules = []
self.styles = {}
def highlightBlock(self, text):
"""Highlight a text block."""
for expression, format in self.rules:
# get first match
index = expression.indexIn(text)
while index >= 0:
length = expression.matchedLength()
self.setFormat(index, length, format)
# jump to next match
index = expression.indexIn(text, index + length)
self.setCurrentBlockState(0)
def addRule (self, pattern, style):
"""Add a rule pattern with given style."""
self.rules.append((QtCore.QRegExp(pattern), self.styles[style]))
class XmlHighlighter (Highlighter):
"""XML syntax highlighter."""
def __init__(self, document):
"""Set XML syntax rules."""
super(XmlHighlighter, self).__init__(document)
self.styles.update({
'keyword': format('darkBlue'),
'attribute': format('darkGreen'),
'comment': format('darkYellow'),
'string': format('darkMagenta'),
})
# keywords
for reg in ('/>', '>', '<!?[a-zA-Z0-9_]+'):
self.addRule(reg, 'keyword')
# attributes
self.addRule(r"\b[A-Za-z0-9_]+(?=\s*\=)", 'attribute')
# double-quoted string, possibly containing escape sequences
self.addRule(r'"[^"\\]*(\\.[^"\\]*)*"', 'string')
# single-quoted string, possibly containing escape sequences
self.addRule(r"'[^'\\]*(\\.[^'\\]*)*'", 'string')
# comments
self.addRule(r"<!--[^>]*-->", 'comment')
# Treat HTML as XML
HtmlHighlighter = XmlHighlighter
class IniHighlighter (Highlighter):
"""INI syntax highlighter."""
def __init__(self, document):
"""Set INI syntax rules."""
super(IniHighlighter, self).__init__(document)
self.styles.update({
'section': format('darkBlue'),
'property': format('darkGreen'),
'comment': format('darkYellow'),
})
self.addRule(r'\b\[[a-zA-Z0-9_]+\]\b', 'section')
self.addRule(r'\b[a-zA-Z0-9_]+\](?=\s*\=)', 'property')
self.addRule(r'#[^\n]*', 'comment')
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