Add svg_usefonts themeable

closes #756

Author: has2k1

doc/_quartodoc.yml

@@ -478,6 +478,7 @@ quartodoc:
         - strip_text_x
         - strip_text_y
         - subplots_adjust
+        - svg_usefonts
         - text
         - title
 

doc/changelog.qmd

@@ -19,6 +19,11 @@ title: Changelog
 - Fixed images generated in quarto so that they have the dimensions
   (taking the dpi into account) that are specified in theme. ({{< issue 773 >}})
 
+### New
+
+- Added themeable [](:class:`~plotnine.themes.themeable.svg_usefonts`).
+  ({{< issue 756 >}})
+
 ### Enhancements
 
 - Added _palmerpenguins_ dataset.

plotnine/themes/theme.py

@@ -218,6 +218,7 @@ def __init__(
         strip_align_x=None,
         strip_align_y=None,
         strip_align=None,
+        svg_usefonts=None,
         **kwargs,
     ):
         self.themeables = Themeables()

plotnine/themes/themeable.py

@@ -2384,6 +2384,33 @@ class strip_align(strip_align_x, strip_align_y):
     """
 
 
+class svg_usefonts(themeable):
+    """
+    How to renderer fonts for svg images
+
+    Parameters
+    ----------
+    theme_element : bool
+        If `True`, assume fonts are installed on the machine where
+        the SVG will be viewed.
+
+        If `False`, embed characters as paths; this is supported by
+        most SVG renderers.
+
+        You should probably set this to `True` if you intend to edit
+        the svg file.
+    """
+
+    @property
+    def rcParams(self) -> dict[str, Any]:
+        rcParams = super().rcParams
+
+        rcParams["svg.fonttype"] = (
+            "none" if self.properties.get("value") else "path"
+        )
+        return rcParams
+
+
 # Deprecated