Crate style

Calculate specified and computed values from a tree of DOM nodes and a set of stylesheets.

In particular, this crate contains the definitions of supported properties, the code to parse them into specified values and calculate the computed values based on the specified values, as well as the code to serialize both specified and computed values.

The main entry point is recalc_style_at.

Major dependencies are the cssparser and selectors crates.

Re-exports

• pub use servo_arc;

Modules

• animation
  CSS transitions and animations.
• applicable_declarations
  Applicable declarations management.
• attr
  Parsed representations of DOM attributes.
• author_styles
  A set of author stylesheets and their computed representation, such as the ones used for ShadowRoot.
• bezier
  Parametric Bézier curves.
• bloom
  The style bloom filter is used as an optimization when matching deep descendant selectors.
• color
  Color support functions.
• computed_value_flags
  Misc information about a given computed style.
• computed_values
  Types for computed values.
• context
  The context within which style is calculated.
• counter_style
  The @counter-style at-rule.
• custom_properties
  Support for custom properties for cascading variables.
• data
  Per-node data used in style calculation.
• dom
  Types and traits used to access the DOM from style calculation.
• dom_apis
  Generic implementations of some DOM APIs so they can be shared between Servo and Gecko.
• driver
  Implements traversal over the DOM tree. The traversal starts in sequential mode, and optionally parallelizes as it discovers work.
• encoding_support 🔒
  Parsing stylesheets from bytes (not &str).
• error_reporting
  Types used to report parsing errors.
• font_face
  The @font-face at-rule.
• font_metrics
  Access to font metrics from the style system.
• global_style_data
  Global style data
• invalidation
  Different bits of code related to invalidating style.
• logical_geometry
  Geometry in flow-relative space.
• macros 🔒
  Various macro helpers.
• matching
  High-level interface to CSS selector matching.
• media_queries
  Media queries.
• parallel
  Implements parallel traversal over the DOM tree.
• parser
  The context within which CSS code is parsed.
• piecewise_linear
  A piecewise linear function, following CSS linear easing
• properties
  Supported CSS properties and the cascade.
• properties_and_values
  Properties and Values
• queries
  Code shared between media queries and container queries.
• rule_cache
  A cache from rule node to computed values, in order to cache reset properties.
• rule_collector
  Collects a series of applicable rules for a given element.
• rule_tree
  The rule tree.
• scoped_tls
  Stack-scoped thread-local storage for rayon thread pools.
• selector_map
  A data structure to efficiently index structs containing selectors by local name, ids and hash.
• selector_parser
  The pseudo-classes and pseudo-elements supported by the style system.
• servo
  Servo-specific bits of the style system.
• shared_lock
  Different objects protected by the same lock
• sharing
  Code related to the style sharing cache, an optimization that allows similar nodes to share style without having to run selector matching twice.
• str
  String utils for attributes and similar stuff.
• style_adjuster
  A struct to encapsulate all the style fixups and flags propagations a computed style needs in order for it to adhere to the CSS spec.
• style_resolver
  Style resolution for a given element or pseudo-element.
• stylesheet_set
  A centralized set of stylesheets for a document.
• stylesheets
  Style sheets and their CSS rules.
• stylist
  Selector matching.
• thread_state
  Supports dynamic assertions in about what sort of thread is running and what state it’s in.
• traversal
  Traversing the DOM tree; the bloom filter.
• traversal_flags
  Flags that control the traversal process.
• use_counters
  Various stuff for CSS property use counters.
• values
  Common values used in CSS.

Macros

• css_properties_accessors
  Call the given macro with tokens like this for each longhand and shorthand properties that is enabled in content:
• longhand_properties_idents
  Call the given macro with tokens like this for each longhand properties:
• reexport_computed_values 🔒

Structs

• AllocErr
  An allocation error.
• ArcSlice
  A wrapper type for a refcounted slice using ThinArc.
• OwnedSlice
  A struct that basically replaces a Box<[T]>, but which cbindgen can understand.
• OwnedStr
  A struct that basically replaces a Box, but with a defined layout, suitable for FFI.

Constants

• CAPACITY_THRESHOLD 🔒

Traits

• CaseSensitivityExt
  Extension methods for selectors::attr::CaseSensitivity
• One
  A trait pretty much similar to num_traits::One, but without the need of implementing Mul.
• ShrinkIfNeeded 🔒
  Shrink the capacity of the collection if needed.
• Zero
  A trait pretty much similar to num_traits::Zero, but without the need of implementing Add.
• ZeroNoPercent
  A trait implementing a function to tell if the number is zero without a percent

Functions

• should_shrink 🔒
  We shrink the capacity of a collection if we’re wasting more than a 25% of its capacity, and if the collection is arbitrarily big enough (>= CAPACITY_THRESHOLD entries).

Type Definitions

• Atom
• LocalName
• Namespace
• Prefix