2020: paint borders

components/layout_2020/display_list.rs

@@ -6,24 +6,22 @@ use crate::fragments::{BoxFragment, Fragment};
 use crate::geom::physical::{Rect, Vec2};
 use crate::style_ext::ComputedValuesExt;
 use app_units::Au;
-use style::values::computed::Length;
-use webrender_api::CommonItemProperties;
+use euclid::{self, SideOffsets2D};
+use style::values::computed::{BorderStyle, Length};
+use webrender_api::{self as wr, units, CommonItemProperties};
 
 pub struct DisplayListBuilder {
-    pipeline_id: webrender_api::PipelineId,
-    pub wr: webrender_api::DisplayListBuilder,
+    pipeline_id: wr::PipelineId,
+    pub wr: wr::DisplayListBuilder,
     pub is_contentful: bool,
 }
 
 impl DisplayListBuilder {
-    pub fn new(
-        pipeline_id: webrender_api::PipelineId,
-        viewport_size: webrender_api::units::LayoutSize,
-    ) -> Self {
+    pub fn new(pipeline_id: wr::PipelineId, viewport_size: wr::units::LayoutSize) -> Self {
         Self {
             pipeline_id,
             is_contentful: false,
-            wr: webrender_api::DisplayListBuilder::new(pipeline_id, viewport_size),
+            wr: wr::DisplayListBuilder::new(pipeline_id, viewport_size),
         }
     }
 }
@@ -67,25 +65,22 @@ impl BoxFragment {
         is_contentful: &mut IsContentful,
         containing_block: &Rect<Length>,
     ) {
-        let background_color = self
-            .style
-            .resolve_color(self.style.clone_background_color());
-        if background_color.alpha > 0 {
-            let clip_rect = self
-                .border_rect()
-                .to_physical(self.style.writing_mode(), containing_block)
-                .translate(&containing_block.top_left)
-                .into();
-            let common = CommonItemProperties {
-                clip_rect,
-                clip_id: webrender_api::ClipId::root(builder.pipeline_id),
-                spatial_id: webrender_api::SpatialId::root_scroll_node(builder.pipeline_id),
-                hit_info: None,
-                // TODO(gw): Make use of the WR backface visibility functionality.
-                is_backface_visible: true,
-            };
-            builder.wr.push_rect(&common, rgba(background_color))
-        }
+        let border_rect = self
+            .border_rect()
+            .to_physical(self.style.writing_mode(), containing_block)
+            .translate(&containing_block.top_left)
+            .into();
+        let common = CommonItemProperties {
+            clip_rect: border_rect,
+            clip_id: wr::ClipId::root(builder.pipeline_id),
+            spatial_id: wr::SpatialId::root_scroll_node(builder.pipeline_id),
+            hit_info: None,
+            // TODO(gw): Make use of the WR backface visibility functionality.
+            is_backface_visible: true,
+        };
+
+        self.background_display_items(builder, &common);
+        self.border_display_items(builder, &common, border_rect);
         let content_rect = self
             .content_rect
             .to_physical(self.style.writing_mode(), containing_block)
@@ -94,10 +89,65 @@ impl BoxFragment {
             child.build_display_list(builder, is_contentful, &content_rect)
         }
     }
+
+    fn background_display_items(
+        &self,
+        builder: &mut DisplayListBuilder,
+        common: &CommonItemProperties,
+    ) {
+        let background_color = self
+            .style
+            .resolve_color(self.style.clone_background_color());
+        if background_color.alpha > 0 {
+            builder.wr.push_rect(common, rgba(background_color))
+        }
+    }
+
+    fn border_display_items(
+        &self,
+        builder: &mut DisplayListBuilder,
+        common: &CommonItemProperties,
+        border_rect: units::LayoutRect,
+    ) {
+        let b = self.style.get_border();
+        let widths = SideOffsets2D::new(
+            b.border_top_width.px(),
+            b.border_right_width.px(),
+            b.border_bottom_width.px(),
+            b.border_left_width.px(),
+        );
+        if widths == SideOffsets2D::zero() {
+            return;
+        }
+        let side = |style, color| wr::BorderSide {
+            color: rgba(self.style.resolve_color(color)),
+            style: match style {
+                BorderStyle::None => wr::BorderStyle::None,
+                BorderStyle::Solid => wr::BorderStyle::Solid,
+                BorderStyle::Double => wr::BorderStyle::Double,
+                BorderStyle::Dotted => wr::BorderStyle::Dotted,
+                BorderStyle::Dashed => wr::BorderStyle::Dashed,
+                BorderStyle::Hidden => wr::BorderStyle::Hidden,
+                BorderStyle::Groove => wr::BorderStyle::Groove,
+                BorderStyle::Ridge => wr::BorderStyle::Ridge,
+                BorderStyle::Inset => wr::BorderStyle::Inset,
+                BorderStyle::Outset => wr::BorderStyle::Outset,
+            },
+        };
+        let details = wr::BorderDetails::Normal(wr::NormalBorder {
+            top: side(b.border_top_style, b.border_top_color),
+            right: side(b.border_right_style, b.border_right_color),
+            bottom: side(b.border_bottom_style, b.border_bottom_color),
+            left: side(b.border_left_style, b.border_left_color),
+            radius: wr::BorderRadius::zero(),
+            do_aa: true,
+        });
+        builder.wr.push_border(common, border_rect, widths, details)
+    }
 }
 
-fn rgba(rgba: cssparser::RGBA) -> webrender_api::ColorF {
-    webrender_api::ColorF::new(
+fn rgba(rgba: cssparser::RGBA) -> wr::ColorF {
+    wr::ColorF::new(
         rgba.red_f32(),
         rgba.green_f32(),
         rgba.blue_f32(),

components/style/properties/helpers.mako.rs

@@ -880,7 +880,8 @@
             {
                 // Define all of the expected variables that correspond to the shorthand
                 % for sub_property in shorthand.sub_properties:
-                    let mut ${sub_property.ident} = None;
+                    let mut ${sub_property.ident} =
+                        None::< &'a longhands::${sub_property.ident}::SpecifiedValue>;
                 % endfor
 
                 // Attempt to assign the incoming declarations to the expected variables

components/style/properties/longhands/border.mako.rs

@@ -107,7 +107,8 @@ ${helpers.single_keyword(
 ${helpers.predefined_type(
     "border-image-source",
     "ImageLayer",
-    engines="gecko servo-2013",
+    engines="gecko servo-2013 servo-2020",
+    servo_2020_pref="layout.2020.unimplemented",
     initial_value="computed::ImageLayer::none()",
     initial_specified_value="specified::ImageLayer::none()",
     spec="https://drafts.csswg.org/css-backgrounds/#the-background-image",
@@ -120,7 +121,8 @@ ${helpers.predefined_type(
 ${helpers.predefined_type(
     "border-image-outset",
     "NonNegativeLengthOrNumberRect",
-    engines="gecko servo-2013",
+    engines="gecko servo-2013 servo-2020",
+    servo_2020_pref="layout.2020.unimplemented",
     initial_value="generics::rect::Rect::all(computed::NonNegativeLengthOrNumber::zero())",
     initial_specified_value="generics::rect::Rect::all(specified::NonNegativeLengthOrNumber::zero())",
     spec="https://drafts.csswg.org/css-backgrounds/#border-image-outset",
@@ -132,7 +134,8 @@ ${helpers.predefined_type(
     "border-image-repeat",
     "BorderImageRepeat",
     "computed::BorderImageRepeat::stretch()",
-    engines="gecko servo-2013",
+    engines="gecko servo-2013 servo-2020",
+    servo_2020_pref="layout.2020.unimplemented",
     initial_specified_value="specified::BorderImageRepeat::stretch()",
     animation_value_type="discrete",
     spec="https://drafts.csswg.org/css-backgrounds/#the-border-image-repeat",
@@ -141,7 +144,8 @@ ${helpers.predefined_type(
 ${helpers.predefined_type(
     "border-image-width",
     "BorderImageWidth",
-    engines="gecko servo-2013",
+    engines="gecko servo-2013 servo-2020",
+    servo_2020_pref="layout.2020.unimplemented",
     initial_value="computed::BorderImageWidth::all(computed::BorderImageSideWidth::one())",
     initial_specified_value="specified::BorderImageWidth::all(specified::BorderImageSideWidth::one())",
     spec="https://drafts.csswg.org/css-backgrounds/#border-image-width",
@@ -152,7 +156,8 @@ ${helpers.predefined_type(
 ${helpers.predefined_type(
     "border-image-slice",
     "BorderImageSlice",
-    engines="gecko servo-2013",
+    engines="gecko servo-2013 servo-2020",
+    servo_2020_pref="layout.2020.unimplemented",
     initial_value="computed::BorderImageSlice::hundred_percent()",
     initial_specified_value="specified::BorderImageSlice::hundred_percent()",
     spec="https://drafts.csswg.org/css-backgrounds/#border-image-slice",

components/style/properties/shorthands/border.mako.rs

@@ -111,7 +111,6 @@ pub fn parse_border<'i, 't>(
     <%helpers:shorthand
         name="border-${side}"
         engines="gecko servo-2013 servo-2020"
-        servo_2020_pref="layout.2020.unimplemented"
         sub_properties="${' '.join(
             'border-%s-%s' % (side, prop)
             for prop in ['color', 'style', 'width']
@@ -146,7 +145,7 @@ pub fn parse_border<'i, 't>(
 % endfor
 
 <%helpers:shorthand name="border"
-    engines="gecko servo-2013"
+    engines="gecko servo-2013 servo-2020"
     sub_properties="${' '.join('border-%s-%s' % (side, prop)
         for side in PHYSICAL_SIDES
         for prop in ['color', 'style', 'width'])}
@@ -384,7 +383,7 @@ pub fn parse_border<'i, 't>(
             spec = "https://drafts.csswg.org/css-logical/#propdef-border-%s-%s" % (axis, prop)
         %>
         <%helpers:shorthand
-            engines="gecko servo-2013"
+            engines="gecko servo-2013 servo-2020"
             name="border-${axis}-${prop}"
             sub_properties="${' '.join(
                 'border-%s-%s-%s' % (axis, side, prop)
@@ -430,7 +429,7 @@ pub fn parse_border<'i, 't>(
     %>
     <%helpers:shorthand
         name="border-${axis}"
-        engines="gecko servo-2013"
+        engines="gecko servo-2013 servo-2020"
         sub_properties="${' '.join(
             'border-%s-%s-width' % (axis, side)
             for side in ['start', 'end']

components/style/values/specified/border.rs

@@ -47,20 +47,13 @@ use style_traits::{CssWriter, ParseError, ToCss};
 pub enum BorderStyle {
     Hidden,
     None,
-    #[cfg(any(feature = "gecko", feature = "servo-layout-2013"))]
     Inset,
-    #[cfg(any(feature = "gecko", feature = "servo-layout-2013"))]
     Groove,
-    #[cfg(any(feature = "gecko", feature = "servo-layout-2013"))]
     Outset,
-    #[cfg(any(feature = "gecko", feature = "servo-layout-2013"))]
     Ridge,
-    #[cfg(any(feature = "gecko", feature = "servo-layout-2013"))]
     Dotted,
-    #[cfg(any(feature = "gecko", feature = "servo-layout-2013"))]
     Dashed,
     Solid,
-    #[cfg(any(feature = "gecko", feature = "servo-layout-2013"))]
     Double,
 }