Hilite and subclasses: minor cleanups; truncate_str(): cleanup

mmgen/amt.py

@@ -73,9 +73,15 @@ class CoinAmt(Decimal,Hilite,InitErrors): # abstract class
 	def fmtc(cls):
 		cls.method_not_implemented()
 
-	def fmt(self,color=False,iwidth=1,prec=None): # iwidth: width of the integer part
+	def fmt(
+			self,
+			color  = False,
+			iwidth = 1,      # width of the integer part
+			prec   = None ):
+
 		s = self.__str__()
 		prec = prec or self.max_prec
+
 		if '.' in s:
 			a,b = s.split('.',1)
 			return self.colorize(

mmgen/obj.py

@@ -273,12 +273,12 @@ class Int(int,Hilite,InitErrors):
 			return cls.init_fail(e,n)
 
 	@classmethod
-	def fmtc(cls,n,*args,**kwargs):
-		return super().fmtc(str(n),*args,**kwargs)
+	def fmtc(cls,s,**kwargs):
+		return super().fmtc(s.__str__(),**kwargs)
 
 	@classmethod
-	def colorize(cls,n,*args,**kwargs):
-		return super().colorize(str(n),*args,**kwargs)
+	def colorize(cls,s,**kwargs):
+		return super().colorize(s.__str__(),**kwargs)
 
 class NonNegativeInt(Int):
 	min_val = 0

mmgen/objmethods.py

@@ -33,14 +33,14 @@ else:
 
 def truncate_str(s,width): # width = screen width
 	wide_count = 0
-	for i in range(len(s)):
-		wide_count += unicodedata.east_asian_width(s[i]) in ('F','W')
-		if wide_count + i >= width:
-			return s[:i] + ('',' ')[
-				unicodedata.east_asian_width(s[i]) in ('F','W')
-				and wide_count + i == width]
-	else: # pad the string to width if necessary
-		return s + ' '*(width-len(s)-wide_count)
+	for n,ch in enumerate(s,1):
+		wide_count += unicodedata.east_asian_width(ch) in ('F','W')
+		if n + wide_count > width:
+			return s[:n-1] + ('',' ')[
+				unicodedata.east_asian_width(ch) in ('F','W')
+				and n + wide_count == width + 1]
+	else:
+		raise ValueError('string requires no truncating')
 
 class Hilite:
 

mmgen/proto/btc/tx/info.py

@@ -81,7 +81,7 @@ class TxInfo(TxInfo):
 						append_chars=('',' (chg)')[bool(not is_input and e.is_chg and terse)],
 						append_color='green')
 				else:
-					mmid_fmt = MMGenID.fmtc(nonmm_str,width=max_mmwid,color=True)
+					mmid_fmt = MMGenID.fmtc( nonmm_str, width=max_mmwid, color=True )
 				if terse:
 					yield '{:3} {} {} {} {}\n'.format(
 						n+1,

mmgen/tw/bal.py

@@ -97,7 +97,7 @@ class TwGetBalance(MMGenObject,metaclass=AsyncInit):
 				for label in sorted(self.data.keys()):
 					yield '{lbl} {cols}'.format(
 						lbl = yellow((label + ' ' + self.proto.coin).ljust(col1_w)) if label == 'TOTAL'
-							else MMGenID.hlc((label+':').ljust(col1_w),color=color),
+							else MMGenID.hlc( (label+':').ljust(col1_w), color=color ),
 						cols = ' '.join(make_col(label,col) for col in self.conf_cols)
 					)
 

mmgen/tw/unspent.py

@@ -186,7 +186,7 @@ class TwUnspentOutputs(TwView):
 				t = (CoinTxID.fmtc('|' + '.'*(cw.txid-1),color=color) if d.skip  == 'txid'
 					else d.txid.truncate( width=cw.txid, color=color )) if cw.txid else None,
 				v = ' ' + d.vout.fmt( width=cw.vout-1, color=color ) if cw.vout else None,
-				a = type(d.addr).fmtc( '|' + '.'*(cw.addr-1), width=cw.addr, color=color ) if d.skip == 'addr'
+				a = d.addr.fmtc( '|' + '.'*(cw.addr-1), width=cw.addr, color=color ) if d.skip == 'addr'
 					else d.addr.fmt( width=cw.addr, color=color ),
 				m = (MMGenID.fmtc( '.'*cw.mmid, color=color ) if d.skip == 'addr'
 					else d.twmmid.fmt( width=cw.mmid, color=color )) if cw.mmid else None,