workspace/kscreensaver/libkscreensaver/kscreensaver-kde3to4-porting.py

   1 #! /usr/bin/env python
   2 #
   3 # Copyright David Faure <faure@kde.org>, License LGPL v2
   4 #
   5 # This script converts a kde3 screensaver to kde4, adapting it to the change
   6 # of API in libkscreensaver.
   7 #
   8 # If the input file could be parsed correctly (i.e. it had extern "C" and kss_* symbols),
   9 # then this script will *overwrite* it with the result of the conversion.
  10 # Make backups first, if you don't use a version control system.
  11 #
  12 # Usage: change those two lines before running the script
  13 #
  14 filename = 'pendulum.cpp'
  15 savername = 'KPendulumSaver'   # Interface is appended to this string.
  16
  17 import string,re,os
  18 f = file(filename, 'r')
  19 data = f.read()
  20 lines = data.split('\n')
  21 externCRe = re.compile('^\s*extern "C"')
  22 appNameRe = re.compile('.*kss_applicationName\s*=\s*(".*")')
  23 descriptionRe = re.compile('.*kss_description\s*=\s*(.*);')
  24 versionRe = re.compile('.*kss_version\s*=\s*(.*);')
  25 inExternC = 0
  26 braceLevel = 0
  27 aboutDataWritten = 0
  28 appName = ''
  29 description = ''
  30 version = ''
  31 outputlines = []
  32 for line in lines:
  33         if (line[0:2] == '//'):
  34                 outputlines.append(line)
  35                 continue
  36         if not inExternC:
  37                 if (externCRe.match(line)):
  38                         inExternC = 1
  39                         if (line.find('{') >= 0):
  40                                 braceLevel = braceLevel+1
  41                         outputlines.append(line.replace('extern "C"', 'class ' + savername + 'Interface : public KScreenSaverInterface'))
  42                 else:
  43                         outputlines.append(line)
  44         else:
  45                 if (line.find('{') >= 0):
  46                         braceLevel = braceLevel+1
  47                 if (line.find('}') >= 0):
  48                         braceLevel = braceLevel-1
  49                 match = appNameRe.match(line)
  50                 if match:
  51                         appName = match.group(1)
  52                         line = ''
  53                 match = descriptionRe.match(line)
  54                 if match:
  55                         description = match.group(1)
  56                         line = ''
  57                 match = versionRe.match(line)
  58                 if match:
  59                         version = match.group(1)
  60                         line = ''
  61                 if appName and description and version and not aboutDataWritten:
  62                         outputlines.append( "public:" )
  63                         outputlines.append( "    virtual KAboutData* aboutData() {" )
  64                         outputlines.append( "        return new KAboutData( " + appName + ", " + description + ", " + version + ", " + description + " );" )
  65                         outputlines.append( "    }" )
  66                         aboutDataWritten = 1
  67
  68                 line = re.sub('KDE_EXPORT\s*','',line)
  69                 line = re.sub('KScreenSaver\s*\*\s*kss_create','virtual KScreenSaver* create',line)
  70                 line = re.sub('QDialog\s*\*\s*kss_setup','virtual QDialog* setup',line)
  71                 if braceLevel == 0:
  72                         outputlines.append( '};' )
  73                         outputlines.append( '' )
  74                         outputlines.append( 'int main( int argc, char *argv[] )' )
  75                         outputlines.append( '{' )
  76                         outputlines.append( '    ' + savername + 'Interface kss;' )
  77                         outputlines.append( '    return kScreenSaverMain( argc, argv, kss );' )
  78                         outputlines.append( '}' )
  79                         inExternC = 0
  80                 else:
  81                         outputlines.append( line )
  82
  83 if not aboutDataWritten:
  84         print "PARSE ERROR"
  85         print 'appName=' + appName
  86         print 'description=' + description
  87         print 'version=' + version
  88 else:
  89         open(filename,"w").write(string.join(outputlines, '\n'))
  90         os.system('svn di ' + filename)