Layout: Remove redundant deny unsafe and format

Add license to two files.

Bypass DisplayListBuilder for some items.

components/layout/block.rs

@@ -25,8 +25,6 @@
 //!
 //!   http://dev.w3.org/csswg/css-sizing/
 
-#![deny(unsafe_code)]
-
 use app_units::{Au, MAX_AU};
 use context::LayoutContext;
 use display_list::{BlockFlowDisplayListBuilding, BorderPaintingMode};

components/layout/construct.rs

@@ -11,8 +11,6 @@
 //! maybe it's an absolute or fixed position thing that hasn't found its containing block yet.
 //! Construction items bubble up the tree from children to parents until they find their homes.
 
-#![deny(unsafe_code)]
-
 use ServoArc;
 use block::BlockFlow;
 use context::{LayoutContext, with_thread_local_font_context};

components/layout/display_list/background.rs

@@ -2,8 +2,6 @@
  * 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/. */
 
-#![deny(unsafe_code)]
-
 // FIXME(rust-lang/rust#26264): Remove GenericBackgroundSize.
 
 use app_units::Au;
@@ -120,6 +118,7 @@ fn compute_background_image_size(
     }
 }
 
+/// Compute a rounded clip rect for the background.
 pub fn clip(
     bg_clip: BackgroundClip,
     absolute_bounds: Rect<Au>,

components/layout/display_list/border.rs

@@ -1,3 +1,7 @@
+/* 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/. */
+
 // FIXME(rust-lang/rust#26264): Remove GenericBorderImageSideWidth.
 
 use app_units::Au;
@@ -22,10 +26,7 @@ use webrender_api::{LayoutSize, LayoutSideOffsets, NormalBorder};
 /// > Percentages: Refer to corresponding dimension of the border box.
 ///
 /// [1]: https://drafts.csswg.org/css-backgrounds-3/#border-radius
-fn corner_radius(
-    radius: BorderCornerRadius,
-    containing_size: Size2D<Au>,
-) -> Size2D<Au> {
+fn corner_radius(radius: BorderCornerRadius, containing_size: Size2D<Au>) -> Size2D<Au> {
     let w = radius.0.width().to_used_value(containing_size.width);
     let h = radius.0.height().to_used_value(containing_size.height);
     Size2D::new(w, h)
@@ -76,34 +77,27 @@ fn overlapping_radii(size: LayoutSize, radii: BorderRadius) -> BorderRadius {
     }
 }
 
-
-pub fn radii(
-    abs_bounds: Rect<Au>,
-    border_style: &Border,
-) -> BorderRadius {
+/// Determine the four corner radii of a border.
+///
+/// Radii may either be absolute or relative to the absolute bounds.
+/// Each corner radius has a width and a height which may differ.
+/// Lastly overlapping radii are shrank so they don't collide anymore.
+pub fn radii(abs_bounds: Rect<Au>, border_style: &Border) -> BorderRadius {
     // TODO(cgaebel): Support border radii even in the case of multiple border widths.
     // This is an extension of supporting elliptical radii. For now, all percentage
     // radii will be relative to the width.
 
     overlapping_radii(
         abs_bounds.size.to_layout(),
         BorderRadius {
-            top_left: corner_radius(
-                border_style.border_top_left_radius,
-                abs_bounds.size,
-            ).to_layout(),
-            top_right: corner_radius(
-                border_style.border_top_right_radius,
-                abs_bounds.size,
-            ).to_layout(),
-            bottom_right: corner_radius(
-                border_style.border_bottom_right_radius,
-                abs_bounds.size,
-            ).to_layout(),
-            bottom_left: corner_radius(
-                border_style.border_bottom_left_radius,
-                abs_bounds.size,
-            ).to_layout(),
+            top_left: corner_radius(border_style.border_top_left_radius, abs_bounds.size)
+                .to_layout(),
+            top_right: corner_radius(border_style.border_top_right_radius, abs_bounds.size)
+                .to_layout(),
+            bottom_right: corner_radius(border_style.border_bottom_right_radius, abs_bounds.size)
+                .to_layout(),
+            bottom_left: corner_radius(border_style.border_bottom_left_radius, abs_bounds.size)
+                .to_layout(),
         },
     )
 }
@@ -114,10 +108,7 @@ pub fn radii(
 /// the inner radii need to be smaller depending on the line width.
 ///
 /// This is used to determine clipping areas.
-pub fn inner_radii(
-    mut radii: BorderRadius,
-    offsets: SideOffsets2D<Au>,
-) -> BorderRadius {
+pub fn inner_radii(mut radii: BorderRadius, offsets: SideOffsets2D<Au>) -> BorderRadius {
     fn inner_length(x: f32, offset: Au) -> f32 {
         0.0_f32.max(x - offset.to_f32_px())
     }
@@ -135,7 +126,7 @@ pub fn inner_radii(
     radii
 }
 
-/// Creates a four-sided border with uniform color, width and corner radius.
+/// Creates a four-sided border with square corners and uniform color and width.
 pub fn simple(color: ColorF, style: BorderStyle) -> NormalBorder {
     let side = BorderSide { color, style };
     NormalBorder {
@@ -155,10 +146,8 @@ fn side_image_outset(outset: LengthOrNumber, border_width: Au) -> Au {
     }
 }
 
-pub fn image_outset(
-    outset: BorderImageOutset,
-    border: SideOffsets2D<Au>,
-) -> SideOffsets2D<Au> {
+/// Compute the additional border-image area.
+pub fn image_outset(outset: BorderImageOutset, border: SideOffsets2D<Au>) -> SideOffsets2D<Au> {
     SideOffsets2D::new(
         side_image_outset(outset.0, border.top),
         side_image_outset(outset.1, border.right),
@@ -199,7 +188,11 @@ fn resolve_percentage(value: NumberOrPercentage, length: u32) -> u32 {
     }
 }
 
-pub fn image_slice(border_image_slice: &StyleRect<NumberOrPercentage>, width: u32, height: u32) -> SideOffsets2D<u32> {
+pub fn image_slice(
+    border_image_slice: &StyleRect<NumberOrPercentage>,
+    width: u32,
+    height: u32,
+) -> SideOffsets2D<u32> {
     SideOffsets2D::new(
         resolve_percentage(border_image_slice.0, height),
         resolve_percentage(border_image_slice.1, width),

components/layout/display_list/builder.rs

@@ -8,8 +8,6 @@
 //! list building, as the actual painting does not happen here—only deciding *what* we're going to
 //! paint.
 
-#![deny(unsafe_code)]
-
 use app_units::{Au, AU_PER_PX};
 use block::BlockFlow;
 use canvas_traits::canvas::{CanvasMsg, FromLayoutMsg};
@@ -1338,7 +1336,8 @@ impl FragmentDisplayListBuilding for Fragment {
                     bounds,
                     image,
                     border_widths,
-                ).is_some()
+                )
+                .is_some()
             {
                 return;
             }
@@ -1519,10 +1518,7 @@ impl FragmentDisplayListBuilding for Fragment {
             base,
             webrender_api::BorderDisplayItem {
                 widths: SideOffsets2D::new_all_same(width).to_layout(),
-                details: BorderDetails::Normal(border::simple(
-                    color,
-                    outline_style.to_layout(),
-                )),
+                details: BorderDetails::Normal(border::simple(color, outline_style.to_layout())),
             },
             Vec::new(),
         )));
@@ -1996,8 +1992,7 @@ impl FragmentDisplayListBuilding for Fragment {
                 }
             },
             SpecificFragmentInfo::Media(ref fragment_info) => {
-                if let Some((ref image_key, _, _)) = fragment_info.current_frame
-                {
+                if let Some((ref image_key, _, _)) = fragment_info.current_frame {
                     let base = create_base_display_item(state);
                     state.add_image_item(
                         base,
@@ -2011,7 +2006,7 @@ impl FragmentDisplayListBuilding for Fragment {
                         },
                     );
                 }
-            }
+            },
             SpecificFragmentInfo::Canvas(ref canvas_fragment_info) => {
                 let image_key = match canvas_fragment_info.source {
                     CanvasFragmentSource::WebGL(image_key) => image_key,
@@ -2023,7 +2018,8 @@ impl FragmentDisplayListBuilding for Fragment {
                                 .send(CanvasMsg::FromLayout(
                                     FromLayoutMsg::SendData(sender),
                                     canvas_fragment_info.canvas_id.clone(),
-                                )).unwrap();
+                                ))
+                                .unwrap();
                             receiver.recv().unwrap().image_key
                         },
                         None => return,
@@ -2140,7 +2136,8 @@ impl FragmentDisplayListBuilding for Fragment {
             self.style.writing_mode,
             Au(0),
             metrics.ascent,
-        ).to_physical(self.style.writing_mode, container_size)
+        )
+        .to_physical(self.style.writing_mode, container_size)
         .to_vector();
 
         // Base item for all text/shadows

components/layout/display_list/gradient.rs

@@ -1,3 +1,7 @@
+/* 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/. */
+
 // FIXME(rust-lang/rust#26264): Remove GenericEndingShape and GenericGradientItem.
 
 use app_units::Au;
@@ -90,7 +94,8 @@ fn convert_gradient_stops(
         .filter_map(|item| match *item {
             GenericGradientItem::ColorStop(ref stop) => Some(*stop),
             _ => None,
-        }).collect::<Vec<_>>();
+        })
+        .collect::<Vec<_>>();
 
     assert!(stop_items.len() >= 2);
 
@@ -273,8 +278,12 @@ pub fn linear(
     let center = Point2D::new(size.width / 2, size.height / 2);
 
     (
-        builder.gradient((center - delta).to_layout(), (center + delta).to_layout(), extend_mode(repeating)),
-        builder.stops().to_vec()
+        builder.gradient(
+            (center - delta).to_layout(),
+            (center + delta).to_layout(),
+            extend_mode(repeating),
+        ),
+        builder.stops().to_vec(),
     )
 }
 
@@ -308,7 +317,11 @@ pub fn radial(
 
     let mut builder = convert_gradient_stops(style, stops, radius.width);
     (
-        builder.radial_gradient(center.to_layout(), radius.to_layout(), extend_mode(repeating)),
+        builder.radial_gradient(
+            center.to_layout(),
+            radius.to_layout(),
+            extend_mode(repeating),
+        ),
         builder.stops().to_vec(),
     )
 }

components/layout/display_list/webrender_helpers.rs

@@ -115,17 +115,20 @@ impl WebRenderDisplayItemConverter for DisplayItem {
             },
             DisplayItem::Border(ref item) => {
                 if !item.data.is_empty() {
-                    builder.push_iter(item.data.iter());
+                    builder.push_stops(item.data.as_ref());
                 }
                 builder.push_item(SpecificDisplayItem::Border(item.item), &self.prim_info());
             },
             DisplayItem::Gradient(ref item) => {
-                builder.push_iter(item.data.iter());
+                builder.push_stops(item.data.as_ref());
                 builder.push_item(SpecificDisplayItem::Gradient(item.item), &self.prim_info());
             },
             DisplayItem::RadialGradient(ref item) => {
-                builder.push_iter(item.data.iter());
-                builder.push_item(SpecificDisplayItem::RadialGradient(item.item), &self.prim_info());
+                builder.push_stops(item.data.as_ref());
+                builder.push_item(
+                    SpecificDisplayItem::RadialGradient(item.item),
+                    &self.prim_info(),
+                );
             },
             DisplayItem::Line(ref item) => {
                 builder.push_line(

components/layout/flex.rs

@@ -4,8 +4,6 @@
 
 //! Layout for elements with a CSS `display` property of `flex`.
 
-#![deny(unsafe_code)]
-
 use app_units::{Au, MAX_AU};
 use block::{AbsoluteAssignBSizesTraversal, BlockFlow, MarginsMayCollapseFlag};
 use context::LayoutContext;

components/layout/fragment.rs

@@ -4,8 +4,6 @@
 
 //! The `Fragment` type, which represents the leaves of the layout tree.
 
-#![deny(unsafe_code)]
-
 use ServoArc;
 use app_units::Au;
 use canvas_traits::canvas::{CanvasMsg, CanvasId};

components/layout/inline.rs

@@ -2,8 +2,6 @@
  * 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/. */
 
-#![deny(unsafe_code)]
-
 use ServoArc;
 use app_units::{Au, MIN_AU};
 use block::AbsoluteAssignBSizesTraversal;

components/layout/list_item.rs

@@ -5,8 +5,6 @@
 //! Layout for elements with a CSS `display` property of `list-item`. These elements consist of a
 //! block and an extra inline fragment for the marker.
 
-#![deny(unsafe_code)]
-
 use app_units::Au;
 use block::BlockFlow;
 use context::{LayoutContext, with_thread_local_font_context};

components/layout/model.rs

@@ -4,8 +4,6 @@
 
 //! Borders, padding, and margins.
 
-#![deny(unsafe_code)]
-
 use app_units::Au;
 use euclid::SideOffsets2D;
 use fragment::Fragment;

components/layout/multicol.rs

@@ -4,8 +4,6 @@
 
 //! CSS Multi-column layout http://dev.w3.org/csswg/css-multicol/
 
-#![deny(unsafe_code)]
-
 use ServoArc;
 use app_units::Au;
 use block::BlockFlow;

components/layout/table.rs

@@ -4,8 +4,6 @@
 
 //! CSS table formatting contexts.
 
-#![deny(unsafe_code)]
-
 use app_units::Au;
 use block::{BlockFlow, CandidateBSizeIterator, ISizeAndMarginsComputer};
 use block::{ISizeConstraintInput, ISizeConstraintSolution};

components/layout/table_caption.rs

@@ -4,8 +4,6 @@
 
 //! CSS table formatting contexts.
 
-#![deny(unsafe_code)]
-
 use app_units::Au;
 use block::BlockFlow;
 use context::LayoutContext;

components/layout/table_cell.rs

@@ -4,8 +4,6 @@
 
 //! CSS table formatting contexts.
 
-#![deny(unsafe_code)]
-
 use app_units::Au;
 use block::{BlockFlow, ISizeAndMarginsComputer, MarginsMayCollapseFlag};
 use context::LayoutContext;

components/layout/table_colgroup.rs

@@ -4,8 +4,6 @@
 
 //! CSS table formatting contexts.
 
-#![deny(unsafe_code)]
-
 use app_units::Au;
 use context::LayoutContext;
 use display_list::{DisplayListBuildState, StackingContextCollectionState};

components/layout/table_row.rs

@@ -4,8 +4,6 @@
 
 //! CSS table formatting contexts.
 
-#![deny(unsafe_code)]
-
 use app_units::Au;
 use block::{BlockFlow, ISizeAndMarginsComputer};
 use context::LayoutContext;

components/layout/table_rowgroup.rs

@@ -4,8 +4,6 @@
 
 //! CSS table formatting contexts.
 
-#![deny(unsafe_code)]
-
 use app_units::Au;
 use block::{BlockFlow, ISizeAndMarginsComputer};
 use context::LayoutContext;