better handling of ansi ctr char

len() counts the ansi control characters which is not a desired
behavior, specially for the info of a data point.
Now we have a custom len function that removes those unwanted characters
before computing the length resulting in a correct alignment.

Author: kakwa

ascii_graph/__init__.py

@@ -3,6 +3,7 @@
 
 from __future__ import unicode_literals
 import sys
+import re
 import collections
 import copy
 
@@ -68,9 +69,9 @@ def __init__(self, line_length=79,
             self.graphsymbol = self._u('█')
         else:
             self.graphsymbol = graphsymbol
-        if len(self.graphsymbol) != 1:
+        if self._len_noansi(self.graphsymbol) != 1:
             raise Exception('Bad graphsymbol length, must be 1',
-                            len(self.graphsymbol))
+                            self._len_noansi(self.graphsymbol))
         self.multivalue = multivalue
         self.hsymbols = [self._u(''), self._u('K'), self._u('M'),
                          self._u('G'), self._u('T'), self._u('P'),
@@ -83,6 +84,11 @@ def __init__(self, line_length=79,
         else:
             self.divider = None
 
+    @staticmethod
+    def _len_noansi(string):
+        l = len(re.sub('\x1b[^m]*m', '', string))
+        return l
+
     def _trans_hr(self, value):
 
         if self.divider is None:
@@ -168,8 +174,8 @@ def _get_thresholds(self, data):
             if maxvalue > all_thre['max_pos_value']:
                 all_thre['max_pos_value'] = maxvalue
 
-            if len(info) > all_thre['info_max_length']:
-                all_thre['info_max_length'] = len(info)
+            if self._len_noansi(info) > all_thre['info_max_length']:
+                all_thre['info_max_length'] = self._len_noansi(info)
 
             if totalvalue_len > all_thre['value_max_length']:
                 all_thre['value_max_length'] = totalvalue_len
@@ -265,7 +271,7 @@ def _gen_graph_string_part(
     def _gen_info_string(self, info, start_info_pos, line_length):
         """Generate the info string + padding
         """
-        number_of_space = (line_length - start_info_pos - len(info))
+        number_of_space = (line_length - start_info_pos - self._len_noansi(info))
         return info + Pyasciigraph._u(' ') * number_of_space
 
     def _gen_value_string(self, value, min_neg_value, color, start_value_pos, start_info_pos):
@@ -390,7 +396,7 @@ def graph(self, label=None, data=[]):
 
         if not label is None:
             san_label = self._sanitize_string(label)
-            label_len = len(san_label)
+            label_len = self._len_noansi(san_label)
         else:
             label_len = 0
 

examples/color_multivalue_graphs.py

@@ -25,14 +25,14 @@
 # Coloring data according to thresholds
 from ascii_graph.colordata import hcolor
 
-test = [('testval0', 600),
-        ('testval1', 500),
-        ('testval2', -400),
-        ('testval3', 400),
-        ('testval4', 300),
-        ('testval5', 200),
-        ('testval6', 100),
-        ('testval7', 50 )]
+test = [('testval0 (\033[92m+\033[0m)', 600),
+        ('testval1 (\033[91m-\033[0m)', 500),
+        ('testval2 (\033[92m+\033[0m)', -400),
+        ('testval3 (\033[92m+\033[0m)', 400),
+        ('testval4 (\033[92m+\033[0m)', 300),
+        ('testval5 (\033[91m-\033[0m)', 200),
+        ('testval6 (\033[92m+\033[0m)', 100),
+        ('testval7 (\033[92m+\033[0m)', 50 )]
 
 thresholds = {
   51:  Gre,

tests/test_lib.py

@@ -40,6 +40,18 @@ def test_unsorted_default_params(self):
             gprint(expected)
             assert res == expected
 
+        def test_noansi_info(self):
+            test = [('long_labe☭ (\033[92m+\033[0m)', 423), ('sl (\033[91m-\033[0m)', 1234), ('line3 (\033[91m-\033[0m)', 531), ('line4', 200), ('line5', 834)]
+            graph = Pyasciigraph()
+            res = graph.graph('☭test print', test)
+            expected = [u'\u262dtest print', u'###############################################################################', u'\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588                                         423  long_labe\u262d (\x1b[92m+\x1b[0m)', u'\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588  1234  sl (\x1b[91m-\x1b[0m)        ', u'\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588                                    531  line3 (\x1b[91m-\x1b[0m)     ', u'\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588                                                   200  line4         ', u'\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588                      834  line5         ']
+            gprint(res)
+            gprint(expected)
+            print res
+            assert res == expected
+
+
+
         def test_float_format(self):
             test = [('long_labe☭', 423.197), ('sl', 1234.12341), ('line3', 531.11), ('line4', 200), ('line5', 834)]
             graph = Pyasciigraph(float_format='{0:,.2f}')