Add InsetRect, move BorderRadius to basic_shape.rs

components/style/values/computed/basic_shape.rs

@@ -0,0 +1,88 @@
+/* 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/. */
+
+//! CSS handling for the computed value of
+//! [`basic-shape`][basic-shape]s
+//!
+//! [basic-shape]: https://drafts.csswg.org/css-shapes/#typedef-basic-shape
+
+use values::computed::{Length, LengthOrPercentage};
+use values::computed::BorderRadiusSize;
+use std::fmt;
+use cssparser::{self, Parser, ToCss, Token};
+
+#[derive(Clone, PartialEq, Copy, Debug)]
+#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
+pub enum BasicShape {
+    Inset(InsetRect),
+    // Circle(Circle),
+    // Ellipse(Ellipse),
+    // Polygon(Polygon),
+}
+
+#[derive(Clone, PartialEq, Copy, Debug)]
+#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
+pub struct InsetRect {
+    pub top: LengthOrPercentage,
+    pub right: LengthOrPercentage,
+    pub bottom: LengthOrPercentage,
+    pub left: LengthOrPercentage,
+    pub round: Option<BorderRadius>,
+}
+
+impl ToCss for InsetRect {
+    // XXXManishearth again, we should try to reduce the number of values printed here
+    fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
+        try!(dest.write_str("inset("));
+        try!(self.top.to_css(dest));
+        try!(dest.write_str(" "));
+        try!(self.right.to_css(dest));
+        try!(dest.write_str(" "));
+        try!(self.bottom.to_css(dest));
+        try!(dest.write_str(" "));
+        try!(self.left.to_css(dest));
+        if let Some(ref radius) = self.round {
+            try!(dest.write_str(" round "));
+            try!(radius.to_css(dest));
+        }
+        dest.write_str(")")
+    }
+}
+
+/// https://drafts.csswg.org/css-backgrounds-3/#border-radius
+#[derive(Clone, PartialEq, Copy, Debug)]
+#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
+pub struct BorderRadius {
+    pub top_left: BorderRadiusSize,
+    pub top_right: BorderRadiusSize,
+    pub bottom_left: BorderRadiusSize,
+    pub bottom_right: BorderRadiusSize,
+}
+
+impl ToCss for BorderRadius {
+    // XXXManishearth: We should be producing minimal output:
+    // if height=width for all, we should not be printing the part after
+    // the slash. For any set of four values,
+    // we should try to reduce them to one or two. This probably should be
+    // a helper function somewhere, for all the parse_four_sides-like
+    // values
+    fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
+        try!(self.top_left.0.width.to_css(dest));
+        try!(dest.write_str(" "));
+        try!(self.top_right.0.width.to_css(dest));
+        try!(dest.write_str(" "));
+        try!(self.bottom_left.0.width.to_css(dest));
+        try!(dest.write_str(" "));
+        try!(self.bottom_right.0.width.to_css(dest));
+        try!(dest.write_str(" / "));
+        try!(self.top_left.0.height.to_css(dest));
+        try!(dest.write_str(" "));
+        try!(self.top_right.0.height.to_css(dest));
+        try!(dest.write_str(" "));
+        try!(self.bottom_left.0.height.to_css(dest));
+        try!(dest.write_str(" "));
+        try!(self.bottom_right.0.height.to_css(dest));
+        dest.write_str(" ")
+    }
+}