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# -*- coding: utf-8 -*-
# Copyright © 2012-2020 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.
"""Chart shortcode."""
from ast import literal_eval
from nikola.plugin_categories import ShortcodePlugin
from nikola.utils import req_missing, load_data
try:
import pygal
except ImportError:
pygal = None
_site = None
class ChartShortcode(ShortcodePlugin):
"""Plugin for chart shortcode."""
name = "chart"
def handler(self, chart_type, **_options):
"""Generate chart using Pygal."""
if pygal is None:
msg = req_missing(
['pygal'], 'use the Chart directive', optional=True)
return '<div class="text-error">{0}</div>'.format(msg)
options = {}
chart_data = []
_options.pop('post', None)
_options.pop('site')
data = _options.pop('data')
for line in data.splitlines():
line = line.strip()
if line:
chart_data.append(literal_eval('({0})'.format(line)))
if 'data_file' in _options:
options = load_data(_options['data_file'])
_options.pop('data_file')
if not chart_data: # If there is data in the document, it wins
for k, v in options.pop('data', {}).items():
chart_data.append((k, v))
options.update(_options)
style_name = options.pop('style', 'BlueStyle')
if '(' in style_name: # Parametric style
style = eval('pygal.style.' + style_name)
else:
style = getattr(pygal.style, style_name)
for k, v in options.items():
try:
options[k] = literal_eval(v)
except Exception:
options[k] = v
chart = pygal
for o in chart_type.split('.'):
chart = getattr(chart, o)
chart = chart(style=style)
if _site and _site.invariant:
chart.no_prefix = True
chart.config(**options)
for label, series in chart_data:
chart.add(label, series)
return chart.render().decode('utf8')
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