Create sugar for nsCSSShadowItem.

components/style/gecko_bindings/sugar/mod.rs

@@ -7,6 +7,7 @@
 mod ns_com_ptr;
 mod ns_compatibility;
 mod ns_css_shadow_array;
+mod ns_css_shadow_item;
 pub mod ns_css_value;
 mod ns_style_auto_array;
 pub mod ns_style_coord;

components/style/gecko_bindings/sugar/ns_css_shadow_item.rs

@@ -0,0 +1,43 @@
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+//! Rust helpers for Gecko's `nsCSSShadowItem`.
+
+use app_units::Au;
+use cssparser::Color;
+use gecko::values::{convert_rgba_to_nscolor, convert_nscolor_to_rgba};
+use gecko_bindings::structs::nsCSSShadowItem;
+use values::computed::Shadow;
+
+impl nsCSSShadowItem {
+    /// Set this item to the given shadow value.
+    pub fn set_from_shadow(&mut self, other: Shadow) {
+        self.mXOffset = other.offset_x.0;
+        self.mYOffset = other.offset_y.0;
+        self.mRadius = other.blur_radius.0;
+        self.mSpread = other.spread_radius.0;
+        self.mInset = other.inset;
+        self.mColor = match other.color {
+            Color::RGBA(rgba) => {
+                self.mHasColor = true;
+                convert_rgba_to_nscolor(&rgba)
+            },
+            // TODO handle currentColor
+            // https://bugzilla.mozilla.org/show_bug.cgi?id=760345
+            Color::CurrentColor => 0,
+        }
+    }
+
+    /// Generate shadow value from this shadow item.
+    pub fn to_shadow(&self) -> Shadow {
+        Shadow {
+            offset_x: Au(self.mXOffset),
+            offset_y: Au(self.mYOffset),
+            blur_radius: Au(self.mRadius),
+            spread_radius: Au(self.mSpread),
+            inset: self.mInset,
+            color: Color::RGBA(convert_nscolor_to_rgba(self.mColor)),
+        }
+    }
+}