Load systems fonts for svg by dafault

CHANGELOG.md

@@ -5,6 +5,9 @@
 * Support embedding videos into slides
 * `.image()` can now take directly image data (e.g. `.image((blob, "png"))`)
 * Better progressbar computing
+* Introduce `system_fonts_for_svg` in `Resources`.
+  It is enabled by default and loads system fonts only for SVG.
+  It is a compromise for slower loading system fonts for non SVG parts and confusions like #72.
 
 # v0.15.0
 

python/nelsie/slidedeck.py

@@ -20,10 +20,13 @@ def __init__(
         *,
         builtin_fonts: bool = True,
         system_fonts: bool = False,
+        system_fonts_for_svg: bool = True,
         default_code_syntaxes: bool = True,
         default_code_themes: bool = True,
     ):
-        self._resources = nelsie_rs.Resources(system_fonts, default_code_syntaxes, default_code_themes)
+        self._resources = nelsie_rs.Resources(
+            system_fonts, system_fonts_for_svg, default_code_syntaxes, default_code_themes
+        )
         if builtin_fonts:
             self._resources.load_fonts_dir(BUILTIN_FONTS_DIR)
             self._resources.set_generic_family("sans-serif", "DejaVu Sans")

src/model/resources.rs

@@ -26,11 +26,12 @@ pub(crate) struct Resources {
 impl Resources {
     pub fn new(
         system_fonts: bool,
+        system_fonts_for_svg: bool,
         default_code_syntaxes: bool,
         default_code_themes: bool,
     ) -> Resources {
         let mut font_db = fontdb::Database::new();
-        if system_fonts {
+        if system_fonts || system_fonts_for_svg {
             font_db.load_system_fonts();
         }
         let syntax_set = if default_code_syntaxes {

src/pyinterface/resources.rs

@@ -12,12 +12,14 @@ impl Resources {
     #[new]
     fn new(
         system_fonts: bool,
+        system_fonts_for_svg: bool,
         default_code_syntaxes: bool,
         default_code_themes: bool,
     ) -> PyResult<Self> {
         Ok(Resources {
             resources: crate::model::Resources::new(
                 system_fonts,
+                system_fonts_for_svg,
                 default_code_syntaxes,
                 default_code_themes,
             ),