[librsvg: 8/18] Extract function to populate a pango::AttrList from FontProperties

[Marge Bot <marge-bot src gnome org>]

commit 29e0e87544969f6699d1dd912044a35aff8c3116
Author: Federico Mena Quintero <federico gnome org>
Date:   Mon Oct 25 18:31:25 2021 -0500

    Extract function to populate a pango::AttrList from FontProperties
    
    Part-of: <https://gitlab.gnome.org/GNOME/librsvg/-/merge_requests/621>

 src/text.rs | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)
---
diff --git a/src/text.rs b/src/text.rs
index 608cc077..eb276a77 100644
--- a/src/text.rs
+++ b/src/text.rs
@@ -1198,8 +1198,22 @@ fn create_pango_layout(draw_ctx: &DrawingCtx, props: &FontProperties, text: &str
     // Maybe we need to implement layout of individual lines by hand.
 
     let attr_list = pango::AttrList::new();
+    add_pango_attributes(&attr_list, &pango_context, props);
 
-    let mut font_desc = pango_context.font_description().unwrap();
+    layout.set_attributes(Some(&attr_list));
+    layout.set_text(text);
+    layout.set_auto_dir(false);
+
+    layout
+}
+
+/// Adds Pango attributes, suitable for a span of text, to an `AttrList`.
+fn add_pango_attributes(
+    attr_list: &pango::AttrList,
+    context: &pango::Context,
+    props: &FontProperties,
+) {
+    let mut font_desc = context.font_description().unwrap();
     font_desc.set_family(props.font_family.as_str());
     font_desc.set_style(pango::Style::from(props.font_style));
 
@@ -1231,12 +1245,6 @@ fn create_pango_layout(draw_ctx: &DrawingCtx, props: &FontProperties, text: &str
         // smcp - small capitals - https://docs.microsoft.com/en-ca/typography/opentype/spec/features_pt#smcp
         attr_list.insert(pango::Attribute::new_font_features("'smcp' 1"));
     }
-
-    layout.set_attributes(Some(&attr_list));
-    layout.set_text(text);
-    layout.set_auto_dir(false);
-
-    layout
 }
 
 #[cfg(test)]