RL2

bzr revid: pinky-2e44d4c158101b4eb29c9fb7cee91c9aaabfed06

1 files changed, 81 insertions, 0 deletions

diff --git a/bin/reportlab/lib/extformat.py b/bin/reportlab/lib/extformat.py
new file mode 100644
index 00000000000..f3450596081
--- /dev/null
+++ b/bin/reportlab/lib/extformat.py
@@ -0,0 +1,81 @@
+#Copyright ReportLab Europe Ltd. 2000-2004
+#see license.txt for license details
+#history http://www.reportlab.co.uk/cgi-bin/viewcvs.cgi/public/reportlab/trunk/reportlab/lib/extformat.py
+from tokenize import tokenprog
+import sys
+
+def _matchorfail(text, pos):
+	match = tokenprog.match(text, pos)
+	if match is None: raise ValueError(text, pos)
+	return match, match.end()
+
+'''
+	Extended dictionary formatting
+	We allow expressions in the parentheses instead of
+	just a simple variable.
+'''
+def dictformat(_format, L={}, G={}):
+	format = _format
+
+	S = {}
+	chunks = []
+	pos = 0
+	n = 0
+
+	while 1:
+		pc = format.find("%", pos)
+		if pc < 0: break
+		nextchar = format[pc+1]
+
+		if nextchar == "(":
+			chunks.append(format[pos:pc])
+			pos, level = pc+2, 1
+			while level:
+				match, pos = _matchorfail(format, pos)
+				tstart, tend = match.regs[3]
+				token = format[tstart:tend]
+				if token == "(": level = level+1
+				elif token == ")": level = level-1
+			vname = '__superformat_%d' % n
+			n += 1
+			S[vname] = eval(format[pc+2:pos-1],L,G)
+			chunks.append('%%(%s)' % vname)
+		else:
+			nc = pc+1+(nextchar=="%")
+			chunks.append(format[pos:nc])
+			pos = nc
+
+	if pos < len(format): chunks.append(format[pos:])
+	return (''.join(chunks)) % S
+
+def magicformat(format):
+	"""Evaluate and substitute the appropriate parts of the string."""
+	try: 1/0
+	except: frame = sys.exc_traceback.tb_frame
+	while frame.f_globals["__name__"] == __name__: frame = frame.f_back
+	return dictformat(format,frame.f_locals, frame.f_globals)
+
+if __name__=='__main__':
+	from reportlab.lib.formatters import DecimalFormatter
+	_DF={}
+	def df(n,dp=2,ds='.',ts=','):
+		try:
+			_df = _DF[dp,ds]
+		except KeyError:
+			_df = _DF[dp,ds] = DecimalFormatter(places=dp,decimalSep=ds,thousandSep=ts)
+		return _df(n)
+
+	from reportlab.lib.extformat import magicformat
+
+	Z={'abc': ('ab','c')}
+	x = 300000.23
+	percent=79.2
+	class dingo:
+		a=3
+	print magicformat('''
+$%%(df(x,dp=3))s --> $%(df(x,dp=3))s
+$%%(df(x,dp=2,ds=',',ts='.'))s --> $%(df(x,dp=2,ds=',',ts='.'))s
+%%(percent).2f%%%% --> %(percent).2f%%
+%%(dingo.a)s --> %(dingo.a)s
+%%(Z['abc'][0])s --> %(Z['abc'][0])s
+''')