Make test tools interactive

By bypassing readlines() buffering.

test/shaping/hb_test_tools.py

@@ -25,6 +25,10 @@ class Colors:
 		else:
 			return Colors.Null
 
+	@staticmethod
+	def Default (argv = []):
+		return Colors.ANSI
+
 
 class FancyDiffer:
 
@@ -80,6 +84,7 @@ class FancyDiffer:
 		for l in f1:
 			sys.stdout.writelines (["-", colors.green, l1, colors.end])
 
+
 class DiffFilters:
 
 	@staticmethod
@@ -89,6 +94,15 @@ class DiffFilters:
 				sys.stdout.writelines (l)
 
 
+class ShapeFilters:
+
+	@staticmethod
+	def filter_failures (f):
+		for l in f:
+			if l[0] in '-+':
+				sys.stdout.writelines (l)
+
+
 class UtilMains:
 
 	@staticmethod
@@ -99,7 +113,7 @@ class UtilMains:
 			sys.exit (1)
 
 		for s in sys.argv[1:]:
-			callback (open_file_or_stdin (s))
+			callback (FileHelpers.open_file_or_stdin (s))
 
 	@staticmethod
 	def filter_multiple_strings_or_stdin (callback, string_mnemonic, \
@@ -113,7 +127,10 @@ class UtilMains:
 
 		if '--stdin' in sys.argv:
 			sys.argv.remove ('--stdin')
-			for line in sys.stdin.readlines ():
+			while (1):
+				line = sys.stdin.readline ()
+				if not len (line):
+					break
 				print callback (line)
 		else:
 			args = sys.argv[1:]
@@ -171,10 +188,14 @@ class Unicode:
 		s = [unichr (int (x, 16)) for x in re.split ('[, \n]', s) if len (x)]
 		return ' + '.join (Unicode.pretty_name (x) for x in s)
 
-def open_file_or_stdin (f):
-	if f == '-':
-		return sys.stdin
-	return file (f)
+
+class FileHelprs:
+
+	@staticmethod
+	def open_file_or_stdin (f):
+		if f == '-':
+			return sys.stdin
+		return file (f)
 
 if __name__ == '__main__':
 	pass