1 files changed, 31 insertions, 0 deletions
diff --git a/servo/components/style/stylesheets/loader.rs b/servo/components/style/stylesheets/loader.rs
new file mode 100644
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+++ b/servo/components/style/stylesheets/loader.rs
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+//! The stylesheet loader is the abstraction used to trigger network requests
+//! for `@import` rules.
+
+use crate::media_queries::MediaList;
+use crate::parser::ParserContext;
+use crate::shared_lock::{Locked, SharedRwLock};
+use crate::stylesheets::import_rule::{ImportLayer, ImportRule, ImportSupportsCondition};
+use crate::values::CssUrl;
+use cssparser::SourceLocation;
+use servo_arc::Arc;
+
+/// The stylesheet loader is the abstraction used to trigger network requests
+/// for `@import` rules.
+pub trait StylesheetLoader {
+    /// Request a stylesheet after parsing a given `@import` rule, and return
+    /// the constructed `@import` rule.
+    fn request_stylesheet(
+        &self,
+        url: CssUrl,
+        location: SourceLocation,
+        context: &ParserContext,
+        lock: &SharedRwLock,
+        media: Arc<Locked<MediaList>>,
+        supports: Option<ImportSupportsCondition>,
+        layer: ImportLayer,
+    ) -> Arc<Locked<ImportRule>>;
+}