Commit of empty majorize function with tests

pygal/config.py

@@ -204,6 +204,10 @@ class Config(object):
         "You can specify explicit y labels",
         "Must be a list of numbers", float)
 
+    y_labels_use_major = Key(
+        True, bool, "Label",
+        "Whether to promote some labels majors.")
+
     show_y_labels = Key(
         True, bool, "Label", "Set to false to hide y-labels")
 

pygal/graph/graph.py

@@ -26,7 +26,7 @@ from pygal.interpolate import INTERPOLATIONS
 from pygal.graph.base import BaseGraph
 from pygal.view import View, LogView, XYLogView
 from pygal.util import (
-    is_major, truncate, reverse_text_len, get_texts_box, cut, rad, decorate)
+    majorize, truncate, reverse_text_len, get_texts_box, cut, rad, decorate)
 from math import sqrt, ceil, cos
 from itertools import repeat, chain
 
@@ -228,8 +228,11 @@ class Graph(BaseGraph):
                 d='M%f %f h%f' % (0, self.view.height, self.view.width),
                 class_='line'
             )
+        majors = majorize(
+            cut(self._y_labels, 1)
+        ) if self.y_labels_use_major else []
         for label, position in self._y_labels:
-            major = is_major(position)
+            major = position in majors
             guides = self.svg.node(axis, class_='%sguides' % (
                 'logarithmic ' if self.logarithmic else ''
             ))
@@ -262,8 +265,11 @@ class Graph(BaseGraph):
         if self._y_2nd_labels:
             secondary_ax = self.svg.node(
                 self.nodes['plot'], class_="axis y2")
+            majors = majorize(
+                cut(self._y_2nd_labels, 1)
+            ) if self.y_labels_use_major else []
             for label, position in self._y_2nd_labels:
-                major = is_major(position)
+                major = position in majors
                 # it is needed, to have the same structure as primary axis
                 guides = self.svg.node(secondary_ax, class_='guides')
                 x = self.view.width + 5

pygal/graph/radar.py

@@ -25,7 +25,7 @@ from __future__ import division
 from pygal.graph.line import Line
 from pygal.adapters import positive, none_to_zero
 from pygal.view import PolarView, PolarLogView
-from pygal.util import deg, cached_property, compute_scale, is_major
+from pygal.util import deg, cached_property, compute_scale, majorize, cut
 from math import cos, pi
 
 
@@ -118,9 +118,12 @@ class Radar(Line):
             return
 
         axis = self.svg.node(self.nodes['plot'], class_="axis y web")
+        majors = majorize(
+            cut(self._y_labels, 1)
+        ) if self.y_labels_use_major else []
 
         for label, r in reversed(self._y_labels):
-            major = is_major(r)
+            major = r in majors
             guides = self.svg.node(axis, class_='guides')
             self.svg.line(
                 guides, [self.view((r, theta)) for theta in self.x_pos],

pygal/test/test_util.py

@@ -19,7 +19,7 @@
 from pygal._compat import u
 from pygal.util import (
     round_to_int, round_to_float, _swap_curly, template, humanize,
-    is_major, truncate, minify_css)
+    truncate, minify_css, majorize)
 from pytest import raises
 
 
@@ -108,13 +108,6 @@ def test_humanize():
     assert humanize(-.000000042) == '-42n'
 
 
-def test_is_major():
-    for n in (0, 1, 1000, 10., 0.1, 0.000001, -10, -.001000, -100.):
-        assert is_major(n)
-    for n in (2, 10002., 100000.0003, -200, -0.0005):
-        assert not is_major(n)
-
-
 def test_truncate():
     assert truncate('1234567890', 50) == '1234567890'
     assert truncate('1234567890', 5) == u('1234…')
@@ -144,3 +137,13 @@ def test_minify_css():
     assert minify_css(css) == (
         '.title{font-family:sans;font-size:12}'
         '.legends .legend text{font-family:monospace;font-size:14}')
+
+
+def test_major():
+    assert majorize((0, .1, .2, .3, .4, .5, .6, .7, .8, .9, 1)) == [0, .5, 1]
+    assert majorize((0, .2, .4, .6, .8, 1)) == [0, 1]
+    assert majorize((0, .2, .4, .6, .8, 1, 1.2, 1.4, 1.6, 1.8, 2)) == [0, 1, 2]
+    assert majorize((0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120)) == [0, 50, 100]
+    assert majorize((0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36)) == [0, 10, 20, 30]
+    assert majorize((0, 1, 2, 3, 4, 5)) == [0, 5]
+    assert majorize((1, 10, 100, 1000, 10000, 100000)) == []

pygal/util.py

@@ -47,9 +47,9 @@ def humanize(number):
         human_readable[int(order) - int(order > 0)])
 
 
-def is_major(number):
-    """Returns True if number is a round order: 1, 100, 0.001"""
-    return not number or 10 ** floor(log10(abs(number))) == abs(number)
+def majorize(s):
+    """Filter s sequence te return only major considered numbers"""
+    return []
 
 
 def round_to_int(number, precision):