1 files changed, 84 insertions, 0 deletions
diff --git a/rsvg/src/style.rs b/rsvg/src/style.rs
new file mode 100644
index 00000000..1afa2a00
--- /dev/null
+++ b/rsvg/src/style.rs
@@ -0,0 +1,84 @@
+//! The `style` element.
+
+use markup5ever::{expanded_name, local_name, namespace_url, ns};
+
+use crate::element::{set_attribute, ElementTrait};
+use crate::error::*;
+use crate::session::Session;
+use crate::xml::Attributes;
+
+/// Represents the syntax used in the `<style>` node.
+///
+/// Currently only "text/css" is supported.
+///
+/// <https://www.w3.org/TR/SVG11/styling.html#StyleElementTypeAttribute>
+/// <https://www.w3.org/TR/SVG11/styling.html#ContentStyleTypeAttribute>
+#[derive(Copy, Clone, PartialEq, Debug)]
+pub enum StyleType {
+    TextCss,
+}
+
+enum_default!(StyleType, StyleType::TextCss);
+
+impl StyleType {
+    fn parse(value: &str) -> Result<StyleType, ValueErrorKind> {
+        // https://html.spec.whatwg.org/multipage/semantics.html#the-style-element
+        //
+        // 4. If element's type attribute is present and its value is
+        // neither the empty string nor an ASCII case-insensitive
+        // match for "text/css", then return.
+
+        if value.eq_ignore_ascii_case("text/css") {
+            Ok(StyleType::TextCss)
+        } else {
+            Err(ValueErrorKind::parse_error(
+                "invalid value for type attribute in style element",
+            ))
+        }
+    }
+}
+
+/// Represents a `<style>` node.
+///
+/// It does not render itself, and just holds CSS stylesheet information for the rest of
+/// the code to use.
+#[derive(Default)]
+pub struct Style {
+    type_: StyleType,
+}
+
+impl Style {
+    pub fn style_type(&self) -> StyleType {
+        self.type_
+    }
+}
+
+impl ElementTrait for Style {
+    fn set_attributes(&mut self, attrs: &Attributes, session: &Session) {
+        for (attr, value) in attrs.iter() {
+            if attr.expanded() == expanded_name!("", "type") {
+                set_attribute(
+                    &mut self.type_,
+                    StyleType::parse(value).attribute(attr),
+                    session,
+                );
+            }
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn parses_style_type() {
+        assert_eq!(StyleType::parse("text/css").unwrap(), StyleType::TextCss);
+    }
+
+    #[test]
+    fn invalid_style_type_yields_error() {
+        assert!(StyleType::parse("").is_err());
+        assert!(StyleType::parse("some-other-stylesheet-language").is_err());
+    }
+}