misc/gdb/print.py

   1 ###############################################################################
   2 # Name:         misc/gdb/print.py
   3 # Purpose:      pretty-printers for wx data structures: this file is meant to
   4 #               be sourced from gdb using "source -p" (or, better, autoloaded
   5 #               in the future...)
   6 # Author:       Vadim Zeitlin
   7 # Created:      2009-01-04
   8 # RCS-Id:       $Id$
   9 # Copyright:    (c) 2009 Vadim Zeitlin
  10 # Licence:      wxWindows licence
  11 ###############################################################################
  12
  13 # Define wxFooPrinter class implementing (at least) to_string() method for each
  14 # wxFoo class we want to pretty print. Then just add wxFoo to the types array
  15 # in wxLookupFunction at the bottom of this file.
  16
  17
  18 # shamelessly stolen from std::string example
  19 class wxStringPrinter:
  20     def __init__(self, val):
  21         self.val = val
  22
  23     def to_string(self):
  24         return self.val['m_impl']['_M_dataplus']['_M_p'].string()
  25
  26     def display_hint(self):
  27         return 'string'
  28
  29 class wxXYPrinterBase:
  30     def __init__(self, val):
  31         self.x = val['x']
  32         self.y = val['y']
  33
  34 class wxPointPrinter(wxXYPrinterBase):
  35     def to_string(self):
  36         return '(%d, %d)' % (self.x, self.y)
  37
  38 class wxSizePrinter(wxXYPrinterBase):
  39     def to_string(self):
  40         return '%d*%d' % (self.x, self.y)
  41
  42 class wxRectPrinter(wxXYPrinterBase):
  43     def __init__(self, val):
  44         wxXYPrinterBase.__init__(self, val)
  45         self.width = val['width']
  46         self.height = val['height']
  47
  48     def to_string(self):
  49         return '(%d, %d) %d*%d' % (self.x, self.y, self.width, self.height)
  50
  51
  52 # The function looking up the pretty-printer to use for the given value.
  53 def wxLookupFunction(val):
  54     # Using a list is probably ok for so few items but consider switching to a
  55     # set (or a dict and cache class types as the keys in it?) if needed later.
  56     types = ['wxString', 'wxPoint', 'wxSize', 'wxRect']
  57
  58     for t in types:
  59         if val.type.tag == t:
  60             # Not sure if this is the best name to create the object of a class
  61             # by name but at least it beats eval()
  62             return globals()[t + 'Printer'](val)
  63
  64     return None
  65
  66 gdb.pretty_printers.append(wxLookupFunction)