py/syntax.py

   1 #!/usr/bin/python
   2 import re
   3 from PyQt4.QtCore import Qt
   4 from PyQt4.QtGui import QFont
   5 from PyQt4.QtGui import QSyntaxHighlighter
   6 from PyQt4.QtGui import QTextCharFormat
   7
   8 BEGIN = 0
   9 ADD = 1
  10 REMOVE = 2
  11 TEXT = 3
  12
  13 class GitSyntaxHighlighter (QSyntaxHighlighter):
  14
  15         def __init__ (self, doc):
  16                 QSyntaxHighlighter.__init__ (self, doc)
  17
  18                 begin = self.__mkformat (QFont.Bold, Qt.cyan)
  19                 addition = self.__mkformat (QFont.Bold, Qt.green)
  20                 removal = self.__mkformat (QFont.Bold, Qt.red)
  21                 message = self.__mkformat (QFont.Bold, Qt.yellow, Qt.black)
  22
  23                 # Catch trailing whitespace
  24                 bad_ws_format = self.__mkformat (QFont.Bold, Qt.black, Qt.red)
  25                 self._bad_ws_regex = re.compile ('(.*?)(\s+)$')
  26                 self._bad_ws_format = bad_ws_format
  27
  28                 self._rules = (
  29                         ( re.compile ('^(@@|\+\+\+|---)'), begin ),
  30                         ( re.compile ('^\+'), addition ),
  31                         ( re.compile ('^-'), removal ),
  32                         ( re.compile ('^:'), message ),
  33                 )
  34
  35         def getFormat (self, line):
  36                 for regex, rule in self._rules:
  37                         if regex.match (line):
  38                                 return rule
  39                 return None
  40
  41         def highlightBlock (self, qstr):
  42                 ascii = qstr.toAscii().data()
  43                 if not ascii: return
  44                 fmt = self.getFormat (ascii)
  45                 if fmt:
  46                         match = self._bad_ws_regex.match (ascii)
  47                         if match and match.group (2):
  48                                 start = len (match.group (1))
  49                                 self.setFormat (0, start, fmt)
  50                                 self.setFormat (start, len (ascii),
  51                                                 self._bad_ws_format)
  52                         else:
  53                                 self.setFormat (0, len (ascii), fmt)
  54
  55         def __mkformat (self, weight, color, bgcolor=None):
  56                 format = QTextCharFormat()
  57                 format.setFontWeight (weight)
  58                 format.setForeground (color)
  59                 if bgcolor: format.setBackground (bgcolor)
  60                 return format
  61
  62
  63 if __name__ == '__main__':
  64         import sys
  65         from PyQt4 import QtCore, QtGui
  66
  67         class SyntaxTestDialog(QtGui.QDialog):
  68                 def __init__ (self, parent):
  69                         QtGui.QDialog.__init__ (self, parent)
  70                         self.setupUi (self)
  71
  72                 def setupUi(self, CommandDialog):
  73                         CommandDialog.resize(QtCore.QSize(QtCore.QRect(0,0,720,512).size()).expandedTo(CommandDialog.minimumSizeHint()))
  74
  75                         self.vboxlayout = QtGui.QVBoxLayout(CommandDialog)
  76                         self.vboxlayout.setObjectName("vboxlayout")
  77
  78                         self.commandText = QtGui.QTextEdit(CommandDialog)
  79
  80                         font = QtGui.QFont()
  81                         font.setFamily("Monospace")
  82                         font.setPointSize(13)
  83                         self.commandText.setFont(font)
  84                         self.commandText.setAcceptDrops(False)
  85                         #self.commandText.setReadOnly(True)
  86                         self.vboxlayout.addWidget(self.commandText)
  87
  88                         GitSyntaxHighlighter (self.commandText.document())
  89
  90
  91         app = QtGui.QApplication (sys.argv)
  92         dialog = SyntaxTestDialog (app.activeWindow())
  93         dialog.show()
  94         dialog.exec_()