mirror of https://github.com/Kozea/pygal.git
Python to generate nice looking SVG graph
http://pygal.org/
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115 lines
3.8 KiB
115 lines
3.8 KiB
# -*- coding: utf-8 -*- |
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# This file is part of pygal_sphinx_directives |
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# |
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# Pygal sphinx integration |
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# Copyright © 2015 Florian Mounier |
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# |
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# This library is free software: you can redistribute it and/or modify it under |
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# the terms of the GNU Lesser General Public License as published by the Free |
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# Software Foundation, either version 3 of the License, or (at your option) any |
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# later version. |
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# |
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# This library is distributed in the hope that it will be useful, but WITHOUT |
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more |
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# details. |
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# |
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# You should have received a copy of the GNU Lesser General Public License |
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# along with pygal. If not, see <http://www.gnu.org/licenses/>. |
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from docutils.parsers.rst import Directive |
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from traceback import format_exc |
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from sphinx.directives.code import CodeBlock |
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import base64 |
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import docutils.core |
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import pygal |
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class PygalDirective(Directive): |
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"""Execute the given python file and puts its result in the document.""" |
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required_arguments = 0 |
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optional_arguments = 2 |
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final_argument_whitespace = True |
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has_content = True |
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def run(self): |
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width, height = map(int, self.arguments[:2]) if len( |
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self.arguments) >= 2 else (600, 400) |
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if len(self.arguments) == 1: |
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self.render_fix = bool(self.arguments[0]) |
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elif len(self.arguments) == 3: |
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self.render_fix = bool(self.arguments[2]) |
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else: |
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self.render_fix = False |
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self.content = list(self.content) |
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content = list(self.content) |
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if self.render_fix: |
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content[-1] = 'rv = ' + content[-1] |
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code = '\n'.join(content) |
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scope = {'pygal': pygal} |
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try: |
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exec(code, scope) |
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except Exception: |
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return [docutils.nodes.system_message( |
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'An exception as occured during code parsing:' |
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' \n %s' % format_exc(), type='ERROR', source='/', |
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level=3)] |
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if self.render_fix: |
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rv = scope['rv'] |
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else: |
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chart = None |
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for key, value in scope.items(): |
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if isinstance(value, pygal.graph.graph.Graph): |
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chart = value |
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self.content.append(key + '.render()') |
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break |
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if chart is None: |
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return [docutils.nodes.system_message( |
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'No instance of graph found', level=3)] |
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if not hasattr(chart, 'style'): |
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chart.style = pygal.style.RTDStyle |
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chart.config.width = width |
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chart.config.height = height |
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chart.explicit_size = True |
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rv = chart.render() |
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try: |
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svg = ( |
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'<embed src="data:image/svg+xml;charset=utf-8;base64,%s" />' % |
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base64.b64encode(rv).decode('utf-8') |
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.replace('\n', '')) |
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except Exception: |
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return [docutils.nodes.system_message( |
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'An exception as occured during graph generation:' |
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' \n %s' % format_exc(), type='ERROR', source='/', |
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level=3)] |
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return [docutils.nodes.raw('', svg, format='html')] |
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class PygalWithCode(PygalDirective): |
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width_code = True |
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def run(self): |
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node_list = super(PygalWithCode, self).run() |
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node_list.extend(CodeBlock( |
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self.name, |
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['python'], |
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self.options, |
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self.content, |
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self.lineno, |
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self.content_offset, |
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self.block_text, |
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self.state, |
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self.state_machine).run()) |
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return [docutils.nodes.compound('', *node_list)] |
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def setup(app): |
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app.add_directive('pygal', PygalDirective) |
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app.add_directive('pygal-code', PygalWithCode) |
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app.add_directive('pygal-sparkline', PygalWithCode) |
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return {'version': '1.0.1'}
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