Auto merge of servo#24165 - nox:victor, r=SimonSapin

Import victor's layout system 🍷

<!-- Reviewable:start -->
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/24165)
<!-- Reviewable:end -->

Author: bors-servo

.mailmap

@@ -6,6 +6,7 @@ Agoston Szepessy <agszepp@gmail.com>
 Alexander Popiak <alex@zenguard.org> <alexander.popiak@gmail.com>
 Alexandrov Sergey <splavgm@gmail.com>
 Antonio de Luna <tonydelun@gmail.com>
+Anthony Ramine <nox@nox.paris> <n.oxyde@gmail.com>
 Askeing Yen (fyen) <askeing@gmail.com>
 Attila Dusnoki <dati91@gmail.com> <dati91@users.noreply.github.com>
 bd339 <bd339@tuta.io> <bd339@localhost.localdomain>

Cargo.lock

@@ -502,7 +502,7 @@ pub fn style_length(style_length: Size, container_size: Option<Au>) -> MaybeAuto
     match style_length {
         Size::Auto => MaybeAuto::Auto,
         Size::LengthPercentage(ref lp) => {
-            MaybeAuto::from_option(lp.0.maybe_to_used_value(container_size))
+            MaybeAuto::from_option(lp.0.maybe_to_used_value(container_size.map(|l| l.into())))
         },
     }
 }

components/layout/model.rs

@@ -14,20 +14,24 @@ doctest = false
 
 [dependencies]
 app_units = "0.7"
+atomic_refcell = "0.1"
+cssparser = "0.25"
 euclid = "0.20"
 fnv = "1.0"
 gfx = {path = "../gfx"}
 gfx_traits = {path = "../gfx_traits"}
 ipc-channel = "0.12"
 libc = "0.2"
 malloc_size_of = { path = "../malloc_size_of" }
+matches = "0.1"
 msg = {path = "../msg"}
 range = {path = "../range"}
 rayon = "1"
+rayon_croissant = "0.1.1"
 script_layout_interface = {path = "../script_layout_interface"}
 script_traits = {path = "../script_traits"}
 serde = "1.0"
-servo_arc = {path = "../servo_arc"}
+servo_arc = { path = "../servo_arc" }
 servo_url = {path = "../url"}
 style = {path = "../style", features = ["servo", "servo-layout-2020"]}
 style_traits = {path = "../style_traits"}

components/layout_2020/Cargo.toml

@@ -2,12 +2,15 @@
  * 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/. */
 
+use gfx::font_cache_thread::FontCacheThread;
 use msg::constellation_msg::PipelineId;
+use std::sync::Mutex;
 use style::context::SharedStyleContext;
 
 pub struct LayoutContext<'a> {
     pub id: PipelineId,
     pub style_context: SharedStyleContext<'a>,
+    pub font_cache_thread: Mutex<FontCacheThread>,
 }
 
 impl<'a> LayoutContext<'a> {

components/layout_2020/context.rs

@@ -2,17 +2,21 @@
  * 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/. */
 
+use crate::element_data::LayoutDataForElement;
+use atomic_refcell::AtomicRefCell;
 use script_layout_interface::StyleData;
 
 #[repr(C)]
 pub struct StyleAndLayoutData {
     pub style_data: StyleData,
+    pub(super) layout_data: AtomicRefCell<LayoutDataForElement>,
 }
 
 impl StyleAndLayoutData {
     pub fn new() -> Self {
         Self {
             style_data: StyleData::new(),
+            layout_data: Default::default(),
         }
     }
 }