Auto merge of #10155 - bholley:generalize_style_structs, r=SimonSapin

Generalize the style structs

This allows geckolib to pass gecko style structs and have the style system write to them directly, provided we implement all the traits.

<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="35" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/10155)
<!-- Reviewable:end -->

components/layout/block.rs

@@ -60,7 +60,7 @@ use style::computed_values::{border_collapse, box_sizing, display, float, overfl
 use style::computed_values::{position, text_align, transform_style};
 use style::context::StyleContext;
 use style::logical_geometry::{LogicalPoint, LogicalRect, LogicalSize, WritingMode};
-use style::properties::ComputedValues;
+use style::properties::{ComputedValues, TComputedValues};
 use style::values::computed::{LengthOrNone, LengthOrPercentageOrNone};
 use style::values::computed::{LengthOrPercentage, LengthOrPercentageOrAuto};
 use util::geometry::MAX_RECT;

components/layout/construct.rs

@@ -45,7 +45,7 @@ use std::sync::atomic::Ordering;
 use style::computed_values::content::ContentItem;
 use style::computed_values::{caption_side, display, empty_cells, float, list_style_position};
 use style::computed_values::{position};
-use style::properties::{self, ComputedValues};
+use style::properties::{self, ComputedValues, TComputedValues};
 use table::TableFlow;
 use table_caption::TableCaptionFlow;
 use table_cell::TableCellFlow;

components/layout/context.rs

@@ -26,13 +26,14 @@ use std::rc::Rc;
 use std::sync::{Arc, Mutex, RwLock};
 use style::context::{LocalStyleContext, StyleContext};
 use style::matching::{ApplicableDeclarationsCache, StyleSharingCandidateCache};
+use style::properties::ComputedValues;
 use style::selector_impl::ServoSelectorImpl;
 use style::servo::SharedStyleContext;
 use url::Url;
 use util::opts;
 
 struct LocalLayoutContext {
-    style_context: LocalStyleContext,
+    style_context: LocalStyleContext<ComputedValues>,
     font_context: RefCell<FontContext>,
 }
 
@@ -107,12 +108,12 @@ pub struct LayoutContext<'a> {
     cached_local_layout_context: Rc<LocalLayoutContext>,
 }
 
-impl<'a> StyleContext<'a, ServoSelectorImpl> for LayoutContext<'a> {
+impl<'a> StyleContext<'a, ServoSelectorImpl, ComputedValues> for LayoutContext<'a> {
     fn shared_context(&self) -> &'a SharedStyleContext {
         &self.shared.style_context
     }
 
-    fn local_context(&self) -> &LocalStyleContext {
+    fn local_context(&self) -> &LocalStyleContext<ComputedValues> {
         &self.cached_local_layout_context.style_context
     }
 }

components/layout/display_list_builder.rs

@@ -51,7 +51,7 @@ use style::computed_values::{border_style, image_rendering, overflow_x, position
 use style::computed_values::{transform, transform_style, visibility};
 use style::logical_geometry::{LogicalPoint, LogicalRect, LogicalSize, WritingMode};
 use style::properties::style_structs::Border;
-use style::properties::{self, ComputedValues};
+use style::properties::{self, ComputedValues, TComputedValues};
 use style::values::RGBA;
 use style::values::computed;
 use style::values::computed::{LengthOrNone, LengthOrPercentage, LengthOrPercentageOrAuto, LinearGradient};

components/layout/flex.rs

@@ -28,8 +28,8 @@ use std::cmp::max;
 use std::sync::Arc;
 use style::computed_values::{flex_direction, float};
 use style::logical_geometry::LogicalSize;
-use style::properties::ComputedValues;
 use style::properties::style_structs;
+use style::properties::{ComputedValues, TComputedValues};
 use style::values::computed::LengthOrPercentageOrAuto;
 
 // A mode describes which logical axis a flex axis is parallel with.

components/layout/flow.rs

@@ -50,7 +50,7 @@ use std::{fmt, mem, raw};
 use style::computed_values::{clear, display, empty_cells, float, position, overflow_x, text_align};
 use style::dom::TRestyleDamage;
 use style::logical_geometry::{LogicalRect, LogicalSize, WritingMode};
-use style::properties::{self, ComputedValues};
+use style::properties::{self, ComputedValues, TComputedValues};
 use style::values::computed::LengthOrPercentageOrAuto;
 use table::{ColumnComputedInlineSize, ColumnIntrinsicInlineSize, TableFlow};
 use table_caption::TableCaptionFlow;

components/layout/fragment.rs

@@ -41,7 +41,7 @@ use style::computed_values::{overflow_x, position, text_decoration, transform_st
 use style::computed_values::{white_space, word_break, z_index};
 use style::dom::TRestyleDamage;
 use style::logical_geometry::{LogicalMargin, LogicalRect, LogicalSize, WritingMode};
-use style::properties::ComputedValues;
+use style::properties::{ComputedValues, TComputedValues};
 use style::values::computed::{LengthOrPercentage, LengthOrPercentageOrAuto};
 use style::values::computed::{LengthOrPercentageOrNone};
 use text;

components/layout/generated_content.rs

@@ -20,7 +20,7 @@ use std::sync::Arc;
 use style::computed_values::content::ContentItem;
 use style::computed_values::{display, list_style_type};
 use style::dom::TRestyleDamage;
-use style::properties::ComputedValues;
+use style::properties::{ComputedValues, TComputedValues};
 use text::TextRunScanner;
 use wrapper::PseudoElementType;
 

components/layout/incremental.rs

@@ -7,7 +7,7 @@ use std::fmt;
 use std::sync::Arc;
 use style::computed_values::float;
 use style::dom::TRestyleDamage;
-use style::properties::ComputedValues;
+use style::properties::{ComputedValues, TComputedValues};
 
 bitflags! {
     #[doc = "Individual layout actions that may be necessary after restyling."]
@@ -53,6 +53,7 @@ bitflags! {
 }
 
 impl TRestyleDamage for RestyleDamage {
+    type ConcreteComputedValues = ComputedValues;
     fn compute(old: Option<&Arc<ComputedValues>>, new: &ComputedValues) -> RestyleDamage { compute_damage(old, new) }
 
     /// Returns a bitmask that represents a flow that needs to be rebuilt and reflowed.

components/layout/inline.rs

@@ -30,7 +30,7 @@ use std::{fmt, isize, mem};
 use style::computed_values::{display, overflow_x, position, text_align, text_justify};
 use style::computed_values::{text_overflow, vertical_align, white_space};
 use style::logical_geometry::{LogicalRect, LogicalSize, WritingMode};
-use style::properties::ComputedValues;
+use style::properties::{ComputedValues, TComputedValues};
 use style::values::computed::LengthOrPercentage;
 use text;
 use unicode_bidi;

components/layout/layout_thread.rs

@@ -72,6 +72,7 @@ use style::error_reporting::ParseErrorReporter;
 use style::logical_geometry::LogicalPoint;
 use style::media_queries::{Device, MediaType};
 use style::parallel::WorkQueueData;
+use style::properties::TComputedValues;
 use style::selector_impl::ServoSelectorImpl;
 use style::selector_matching::USER_OR_USER_AGENT_STYLESHEETS;
 use style::servo::{SharedStyleContext, Stylesheet, Stylist};

components/layout/list_item.rs

@@ -23,7 +23,7 @@ use inline::InlineMetrics;
 use std::sync::Arc;
 use style::computed_values::{list_style_type, position};
 use style::logical_geometry::LogicalSize;
-use style::properties::ComputedValues;
+use style::properties::{ComputedValues, TComputedValues};
 use text;
 
 /// A block with the CSS `display` property equal to `list-item`.

components/layout/model.rs

@@ -13,7 +13,7 @@ use std::cmp::{max, min};
 use std::fmt;
 use style::computed_values::transform::ComputedMatrix;
 use style::logical_geometry::LogicalMargin;
-use style::properties::ComputedValues;
+use style::properties::{ComputedValues, TComputedValues};
 use style::values::computed::{BorderRadiusSize, LengthOrPercentageOrAuto};
 use style::values::computed::{LengthOrPercentage, LengthOrPercentageOrNone};
 

components/layout/multicol.rs

@@ -21,7 +21,7 @@ use std::fmt;
 use std::sync::Arc;
 use style::context::StyleContext;
 use style::logical_geometry::LogicalSize;
-use style::properties::ComputedValues;
+use style::properties::{ComputedValues, TComputedValues};
 use style::values::computed::{LengthOrPercentageOrAuto, LengthOrPercentageOrNone};
 use util::print_tree::PrintTree;
 

components/layout/query.rs

@@ -27,6 +27,7 @@ use std::sync::{Arc, Mutex};
 use string_cache::Atom;
 use style::computed_values;
 use style::logical_geometry::{WritingMode, BlockFlowDirection, InlineBaseDirection};
+use style::properties::TComputedValues;
 use style::properties::longhands::{display, position};
 use style::properties::style_structs;
 use style::selector_impl::PseudoElement;

components/layout/table.rs

@@ -25,7 +25,7 @@ use std::fmt;
 use std::sync::Arc;
 use style::computed_values::{border_collapse, border_spacing, table_layout};
 use style::logical_geometry::LogicalSize;
-use style::properties::ComputedValues;
+use style::properties::{ComputedValues, TComputedValues};
 use style::values::CSSFloat;
 use style::values::computed::LengthOrPercentageOrAuto;
 use table_row::{TableRowFlow};

components/layout/table_caption.rs

@@ -17,7 +17,7 @@ use gfx::display_list::{StackingContext, StackingContextId};
 use std::fmt;
 use std::sync::Arc;
 use style::logical_geometry::LogicalSize;
-use style::properties::ComputedValues;
+use style::properties::{ComputedValues, TComputedValues};
 use util::print_tree::PrintTree;
 
 /// A table formatting context.

components/layout/table_cell.rs

@@ -21,7 +21,7 @@ use std::fmt;
 use std::sync::Arc;
 use style::computed_values::{border_collapse, border_top_style};
 use style::logical_geometry::{LogicalMargin, LogicalRect, LogicalSize, WritingMode};
-use style::properties::ComputedValues;
+use style::properties::{ComputedValues, TComputedValues};
 use table::InternalTable;
 use table_row::{CollapsedBorder, CollapsedBorderProvenance};
 use util::print_tree::PrintTree;

components/layout/table_colgroup.rs

@@ -18,7 +18,7 @@ use std::cmp::max;
 use std::fmt;
 use std::sync::Arc;
 use style::logical_geometry::LogicalSize;
-use style::properties::ComputedValues;
+use style::properties::{ComputedValues, TComputedValues};
 use style::values::computed::LengthOrPercentageOrAuto;
 
 /// A table formatting context.

components/layout/table_row.rs

@@ -25,7 +25,7 @@ use std::iter::{Enumerate, IntoIterator, Peekable};
 use std::sync::Arc;
 use style::computed_values::{border_collapse, border_spacing, border_top_style};
 use style::logical_geometry::{LogicalSize, PhysicalSide, WritingMode};
-use style::properties::ComputedValues;
+use style::properties::{ComputedValues, TComputedValues};
 use style::values::computed::LengthOrPercentageOrAuto;
 use table::{ColumnComputedInlineSize, ColumnIntrinsicInlineSize, InternalTable, VecExt};
 use table_cell::{CollapsedBordersForCell, TableCellFlow};

components/layout/table_rowgroup.rs

@@ -21,7 +21,7 @@ use std::iter::{IntoIterator, Iterator, Peekable};
 use std::sync::Arc;
 use style::computed_values::{border_collapse, border_spacing};
 use style::logical_geometry::{LogicalSize, WritingMode};
-use style::properties::ComputedValues;
+use style::properties::{ComputedValues, TComputedValues};
 use table::{ColumnComputedInlineSize, ColumnIntrinsicInlineSize, InternalTable, TableLikeFlow};
 use table_row;
 use util::print_tree::PrintTree;

components/layout/table_wrapper.rs

@@ -31,7 +31,7 @@ use std::ops::Add;
 use std::sync::Arc;
 use style::computed_values::{border_collapse, table_layout};
 use style::logical_geometry::LogicalSize;
-use style::properties::ComputedValues;
+use style::properties::{ComputedValues, TComputedValues};
 use style::values::CSSFloat;
 use style::values::computed::LengthOrPercentageOrAuto;
 use table::{ColumnComputedInlineSize, ColumnIntrinsicInlineSize};

components/layout/text.rs

@@ -23,8 +23,8 @@ use std::sync::Arc;
 use style::computed_values::{line_height, text_orientation, text_rendering, text_transform};
 use style::computed_values::{white_space};
 use style::logical_geometry::{LogicalSize, WritingMode};
-use style::properties::ComputedValues;
 use style::properties::style_structs::Font as FontStyle;
+use style::properties::{ComputedValues, TComputedValues};
 use unicode_bidi::{is_rtl, process_text};
 use unicode_script::{get_script, Script};
 use util::linked_list::split_off_head;

components/layout/wrapper.rs

@@ -66,7 +66,7 @@ use style::computed_values::content::ContentItem;
 use style::computed_values::{content, display};
 use style::dom::{TDocument, TElement, TNode, UnsafeNode};
 use style::element_state::*;
-use style::properties::ComputedValues;
+use style::properties::{ComputedValues, TComputedValues};
 use style::properties::{PropertyDeclaration, PropertyDeclarationBlock};
 use style::restyle_hints::ElementSnapshot;
 use style::selector_impl::{NonTSPseudoClass, PseudoElement, ServoSelectorImpl};
@@ -131,6 +131,7 @@ impl<'ln> ServoLayoutNode<'ln> {
 }
 
 impl<'ln> TNode for ServoLayoutNode<'ln> {
+    type ConcreteComputedValues = ComputedValues;
     type ConcreteElement = ServoLayoutElement<'ln>;
     type ConcreteDocument = ServoLayoutDocument<'ln>;
     type ConcreteRestyleDamage = RestyleDamage;