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# -*- coding: utf-8 -*-
# Copyright © 2012-2014 Roberto Alsina and others.
# Permission is hereby granted, free of charge, to any
# person obtaining a copy of this software and associated
# documentation files (the "Software"), to deal in the
# Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the
# Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice
# shall be included in all copies or substantial portions of
# the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
# PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
# OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
# OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
from ast import literal_eval
from docutils import nodes
from docutils.parsers.rst import Directive, directives
try:
import pygal
except ImportError:
pygal = None # NOQA
from nikola.plugin_categories import RestExtension
from nikola.utils import req_missing
class Plugin(RestExtension):
name = "rest_chart"
def set_site(self, site):
self.site = site
directives.register_directive('chart', Chart)
return super(Plugin, self).set_site(site)
class Chart(Directive):
""" Restructured text extension for inserting charts as SVG
Usage:
.. chart:: Bar
:title: 'Browser usage evolution (in %)'
:x_labels: ["2002", "2003", "2004", "2005", "2006", "2007"]
'Firefox', [None, None, 0, 16.6, 25, 31]
'Chrome', [None, None, None, None, None, None]
'IE', [85.8, 84.6, 84.7, 74.5, 66, 58.6]
'Others', [14.2, 15.4, 15.3, 8.9, 9, 10.4]
"""
has_content = True
required_arguments = 1
option_spec = {
"copy": directives.unchanged,
"css": directives.unchanged,
"disable_xml_declaration": directives.unchanged,
"dots_size": directives.unchanged,
"explicit_size": directives.unchanged,
"fill": directives.unchanged,
"font_sizes": directives.unchanged,
"height": directives.unchanged,
"human_readable": directives.unchanged,
"include_x_axis": directives.unchanged,
"interpolate": directives.unchanged,
"interpolation_parameters": directives.unchanged,
"interpolation_precision": directives.unchanged,
"js": directives.unchanged,
"label_font_size": directives.unchanged,
"legend_at_bottom": directives.unchanged,
"legend_box_size": directives.unchanged,
"legend_font_size": directives.unchanged,
"logarithmic": directives.unchanged,
"major_label_font_size": directives.unchanged,
"margin": directives.unchanged,
"no_data_font_size": directives.unchanged,
"no_data_text": directives.unchanged,
"no_prefix": directives.unchanged,
"order_min": directives.unchanged,
"pretty_print": directives.unchanged,
"print_values": directives.unchanged,
"print_zeroes": directives.unchanged,
"range": directives.unchanged,
"rounded_bars": directives.unchanged,
"show_dots": directives.unchanged,
"show_legend": directives.unchanged,
"show_minor_x_labels": directives.unchanged,
"show_y_labels": directives.unchanged,
"spacing": directives.unchanged,
"strict": directives.unchanged,
"stroke": directives.unchanged,
"style": directives.unchanged,
"title": directives.unchanged,
"title_font_size": directives.unchanged,
"to_dict": directives.unchanged,
"tooltip_border_radius": directives.unchanged,
"tooltip_font_size": directives.unchanged,
"truncate_label": directives.unchanged,
"truncate_legend": directives.unchanged,
"value_font_size": directives.unchanged,
"value_formatter": directives.unchanged,
"width": directives.unchanged,
"x_label_rotation": directives.unchanged,
"x_labels": directives.unchanged,
"x_labels_major": directives.unchanged,
"x_labels_major_count": directives.unchanged,
"x_labels_major_every": directives.unchanged,
"x_title": directives.unchanged,
"y_label_rotation": directives.unchanged,
"y_labels": directives.unchanged,
"y_title": directives.unchanged,
"zero": directives.unchanged,
}
def run(self):
if pygal is None:
msg = req_missing(['pygal'], 'use the Chart directive', optional=True)
return [nodes.raw('', '<div class="text-error">{0}</div>'.format(msg), format='html')]
options = {}
if 'style' in self.options:
style_name = self.options.pop('style')
else:
style_name = 'BlueStyle'
if '(' in style_name: # Parametric style
style = eval('pygal.style.' + style_name)
else:
style = getattr(pygal.style, style_name)
for k, v in self.options.items():
options[k] = literal_eval(v)
chart = getattr(pygal, self.arguments[0])(style=style)
chart.config(**options)
for line in self.content:
label, series = literal_eval('({0})'.format(line))
chart.add(label, series)
return [nodes.raw('', chart.render().decode('utf8'), format='html')]
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