Fix #237 + protocol fix

demo/moulinrouge/__init__.py

@@ -300,7 +300,7 @@ def create_app():
     def raw_svgs():
         svgs = []
         for color in styles['neon'].colors:
-            chart = pygal.Pie(style=parametric_styles['RotateStyle'](color),
+            chart = pygal.Pie(style=parametric_styles['rotate'](color),
                               width=400, height=300)
             chart.title = color
             chart.disable_xml_declaration = True

docs/api/pygal.graph.verticalpyramid.rst

@@ -1,7 +0,0 @@
-pygal.graph.verticalpyramid module
-==================================
-
-.. automodule:: pygal.graph.verticalpyramid
-    :members:
-    :undoc-members:
-    :show-inheritance:

docs/api/pygal.test.test_donut.rst

@@ -1,7 +0,0 @@
-pygal.test.test_donut module
-============================
-
-.. automodule:: pygal.test.test_donut
-    :members:
-    :undoc-members:
-    :show-inheritance:

docs/changelog.rst

@@ -30,6 +30,7 @@ Changelog
 * Fix timezones in DateTimeLine
 * Rename in Style foreground_light as foreground_strong
 * Rename in Style foreground_dark as foreground_subtle
+* Add a ``render_data_uri`` method
 
 1.7.0
 =====

docs/documentation/configuration/rendering.rst

@@ -128,6 +128,7 @@ Default:
 Css can also specified inline by prepending `inline:` to the css:
 
 .. code-block:: python
+
    css = ['inline:.rect { fill: blue; }']
 
 
@@ -141,3 +142,13 @@ js
     ]
 
 See `pygal.js <https://github.com/Kozea/pygal.js/>`_
+
+
+force_uri_protocol
+------------------
+
+In case of rendering the svg as a data uri, it is mandatory to specify a protocol.
+
+It can be set to http or https and will be used for '//domain/' like uri.
+
+It is used along with ``render_data_uri``.

docs/documentation/output.rst

@@ -67,6 +67,19 @@ It is possible to get the xml etree root element of the chart (or lxml etree nod
    chart.render_tree()  # Return the svg root etree node
 
 
+Base 64 data URI
+----------------
+
+You can directly output a base 64 encoded data uri for <embed> or <image> inclusion:
+
+
+.. code-block:: python
+
+   chart = pygal.Line()
+   ...
+   chart.render_data_uri()  # Return `data:image/svg+xml;charset=utf-8;base64,...`
+
+
 Browser
 -------
 

docs/ext/pygal_sphinx_directives.py

@@ -22,7 +22,6 @@ from docutils.parsers.rst import Directive
 from traceback import format_exc, print_exc
 from sphinx.directives.code import CodeBlock
 
-import base64
 import docutils.core
 import pygal
 
@@ -86,13 +85,9 @@ class PygalDirective(Directive):
             chart.config.width = width
             chart.config.height = height
             chart.explicit_size = True
-            rv = chart.render()
 
         try:
-            svg = (
+            svg = '<embed src="%s" />' % chart.render_data_uri()
-                '<embed src="data:image/svg+xml;charset=utf-8;base64,%s" />' %
-                base64.b64encode(rv).decode('utf-8')
-                .replace('\n', ''))
         except Exception:
             return [docutils.nodes.system_message(
                 'An exception as occured during graph generation:'

pygal/config.py

@@ -483,7 +483,13 @@ class Config(CommonConfig):
     disable_xml_declaration = Key(
         False, bool, "Misc",
         "Don't write xml declaration and return str instead of string",
-        "usefull for writing output directly in html")
+        "useful for writing output directly in html")
+
+    force_uri_protocol = Key(
+        None, str, "Misc",
+        "Default uri protocol",
+        "In case of rendering the svg as a data uri, it is mandatory to "
+        "specify a protocol. It can be set to http or https")
 
     explicit_size = Key(
         False, bool, "Misc", "Write width and height attributes")

pygal/graph/public.py

@@ -21,6 +21,7 @@
 import io
 from pygal._compat import u, is_list_like
 from pygal.graph.base import BaseGraph
+import base64
 
 
 class PublicApi(BaseGraph):
@@ -92,6 +93,16 @@ class PublicApi(BaseGraph):
         return HttpResponse(
             self.render(**kwargs), content_type='image/svg+xml')
 
+    def render_data_uri(self, **kwargs):
+        """Output a base 64 encoded data uri"""
+        # Force protocol as data uri have none
+        kwargs.setdefault('force_uri_protocol', 'https')
+        return "data:image/svg+xml;charset=utf-8;base64,%s" % (
+            base64.urlsafe_b64encode(
+                self.render(**kwargs)
+            ).decode('utf-8').replace('\n', '')
+        )
+
     def render_to_file(self, filename, **kwargs):
         """Render the graph, and write it to filename"""
         with io.open(filename, 'w', encoding='utf-8') as f:

pygal/svg.py

@@ -120,6 +120,8 @@ class Svg(object):
                     css_text = minify_css(css_text)
                 all_css.append(css_text)
             else:
+                if css.startswith('//') and self.graph.force_uri_protocol:
+                    css = '%s:%s' % (self.graph.force_uri_protocol, css)
                 self.processing_instructions.append(
                     etree.PI(
                         u('xml-stylesheet'), u('href="%s"' % css)))
@@ -154,6 +156,8 @@ class Svg(object):
                 with io.open(js[len('file://'):], encoding='utf-8') as f:
                     script.text = f.read()
             else:
+                if js.startswith('//') and self.graph.force_uri_protocol:
+                    js = '%s:%s' % (self.graph.force_uri_protocol, js)
                 self.node(self.defs, 'script', type='text/javascript', href=js)
 
     def node(self, parent=None, tag='g', attrib=None, **extras):

pygal/test/test_config.py

@@ -491,3 +491,12 @@ def test_fill(Chart):
     chart.add('_', [1, 2, 3])
     chart.add('?', [10, 21, 5])
     assert chart.render_pyquery()
+
+
+def test_render_data_uri(Chart):
+    """Test the render data uri"""
+    chart = Chart(fill=True)
+    chart.add(u('ééé'), [1, 2, 3])
+    chart.add(u('èèè'), [10, 21, 5])
+    assert chart.render_data_uri().startswith(
+        'data:image/svg+xml;charset=utf-8;base64,')