[Zope-dev] DTML Syntax contd. + rant + summary

[Stuart 'Zen' Bishop]

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On Thu, 11 Nov 1999, Christopher Petrilli wrote:

> On 11/11/99 5:35 PM, Stuart 'Zen' Bishop at zen@cs.rmit.edu.au wrote:
> 
> > Magic sequence- variables need to have aliases of sequence_ (everyone
> > rabidly agrees on this) Strangely enough no one has owned up to
> > actually implementing the '-' variables, most likely as they are
> > afraid of being lynched.
> 
> I looked at this today, it's not going into 2.1 most likely, it's a LOT of
> work to make sure it works, *and* doesn't have any negative performance
> impact.  Since it will by its nature, I'll need to balance that with a
> performance enhancement somewhere :-)

Is this any good as a temporary fix?

*** DT_InSV.py.org	Fri Nov 12 15:26:50 1999
--- DT_InSV.py	Fri Nov 12 16:06:51 1999
***************
*** 88,94 ****
  $Id: DT_InSV.py,v 1.16 1999/11/02 16:51:32 brian Exp $'''
  __version__='$Revision: 1.16 $'[11:-2]
  
! from string import lower, rfind, split, join
  from math import sqrt
  TupleType=type(())
  try:
--- 88,95 ----
  $Id: DT_InSV.py,v 1.16 1999/11/02 16:51:32 brian Exp $'''
  __version__='$Revision: 1.16 $'[11:-2]
  
! from UserDict import UserDict
! from string import lower, rfind, split, join, replace
  from math import sqrt
  TupleType=type(())
  try:
***************
*** 96,101 ****
--- 97,122 ----
      mv=Missing.Value
  except: mv=None
  
+ def _transkey(key):
+     if key[:13] == 'sequence-var-':
+ 	# Only translate the first 2 '-' characters in a sequence-var-
+ 	return replace(key,'-','_',2) 
+     else:
+ 	return replace(key,'-','_')
+ 
+ class sequence_kwdict(UserDict):
+     '''This class is used to implement the dictionary in sequence_variables
+        It duplicates keys containing '-' characters to a corresponding entry
+        with a key mapping all the first two '-' characters to '_' characters. 
+        This will greatly improve DTML readability.'''
+ 
+     def __setitem__(self,key,value):
+ 	self.data[key] = value
+ 	self.data[_transkey(key)] = value
+ 
+     def __delitem__(self,key,value):
+ 	del self.data[key]
+ 	del self.data[_transkey(key)]
  
  class sequence_variables:
  
***************
*** 105,116 ****
          self.query_string=query_string
          self.start_name_re=start_name_re
  
!         self.data=data={
              'previous-sequence': 0,
              'next-sequence': 0,
              'sequence-start': 1,
              'sequence-end': 0,
!             }
  
  
      def number(self,index): return index+1
--- 126,137 ----
          self.query_string=query_string
          self.start_name_re=start_name_re
  
!         self.data=data=sequence_kwdict({
              'previous-sequence': 0,
              'next-sequence': 0,
              'sequence-start': 1,
              'sequence-end': 0,
!             })
  
  
      def number(self,index): return index+1


 ___
   //     Zen (alias Stuart Bishop)     Work: zen@cs.rmit.edu.au
  // E N  Senior Systems Alchemist      Play: zen@shangri-la.dropbear.id.au
 //__     Computer Science, RMIT 	 WWW: http://www.cs.rmit.edu.au/~zen

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