mirror of
https://github.com/servo/servo.git
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a76cb65751
This needs to dumb down the parsing in order to match what we do in Gecko and pass more tests. The remaining tests are just because of calc() in media queries and "or" media expressions. Bug: 1408308 Reviewed-by: Manishearth MozReview-Commit-ID: CXGdYVbojBL
229 lines
7 KiB
Rust
229 lines
7 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//! Calculate [specified][specified] and [computed values][computed] from a
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//! tree of DOM nodes and a set of stylesheets.
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//!
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//! [computed]: https://drafts.csswg.org/css-cascade/#computed
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//! [specified]: https://drafts.csswg.org/css-cascade/#specified
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//!
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//! In particular, this crate contains the definitions of supported properties,
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//! the code to parse them into specified values and calculate the computed
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//! values based on the specified values, as well as the code to serialize both
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//! specified and computed values.
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//!
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//! The main entry point is [`recalc_style_at`][recalc_style_at].
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//!
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//! [recalc_style_at]: traversal/fn.recalc_style_at.html
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//!
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//! Major dependencies are the [cssparser][cssparser] and [selectors][selectors]
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//! crates.
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//!
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//! [cssparser]: ../cssparser/index.html
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//! [selectors]: ../selectors/index.html
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// #![deny(warnings)]
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#![deny(missing_docs)]
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// FIXME(bholley): We need to blanket-allow unsafe code in order to make the
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// gecko atom!() macro work. When Rust 1.14 is released [1], we can uncomment
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// the commented-out attributes in regen_atoms.py and go back to denying unsafe
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// code by default.
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//
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// [1] https://github.com/rust-lang/rust/issues/15701#issuecomment-251900615
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//#![deny(unsafe_code)]
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#![allow(unused_unsafe)]
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#![recursion_limit = "500"] // For define_css_keyword_enum! in -moz-appearance
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extern crate app_units;
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extern crate arrayvec;
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extern crate atomic_refcell;
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#[macro_use]
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extern crate bitflags;
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#[allow(unused_extern_crates)] extern crate byteorder;
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#[cfg(feature = "gecko")] #[macro_use] #[no_link] extern crate cfg_if;
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#[macro_use] extern crate cssparser;
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extern crate euclid;
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extern crate fallible;
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extern crate fnv;
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#[cfg(feature = "gecko")] #[macro_use] pub mod gecko_string_cache;
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extern crate hashglobe;
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extern crate itertools;
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extern crate itoa;
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#[cfg(feature = "servo")] #[macro_use] extern crate html5ever;
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#[macro_use]
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extern crate lazy_static;
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#[macro_use]
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extern crate log;
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extern crate lru_cache;
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#[macro_use] extern crate malloc_size_of;
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#[macro_use] extern crate malloc_size_of_derive;
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#[allow(unused_extern_crates)]
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#[macro_use]
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extern crate matches;
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#[cfg(feature = "gecko")]
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pub extern crate nsstring;
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#[cfg(feature = "gecko")] extern crate num_cpus;
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extern crate num_integer;
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extern crate num_traits;
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extern crate ordered_float;
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extern crate owning_ref;
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extern crate parking_lot;
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extern crate precomputed_hash;
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extern crate rayon;
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extern crate selectors;
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#[cfg(feature = "servo")] #[macro_use] extern crate serde;
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pub extern crate servo_arc;
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#[cfg(feature = "servo")] #[macro_use] extern crate servo_atoms;
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#[cfg(feature = "servo")] extern crate servo_config;
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#[cfg(feature = "servo")] extern crate servo_url;
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extern crate smallbitvec;
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extern crate smallvec;
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#[macro_use]
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extern crate style_derive;
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#[macro_use]
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extern crate style_traits;
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extern crate time;
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extern crate unicode_bidi;
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#[allow(unused_extern_crates)]
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extern crate unicode_segmentation;
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#[macro_use]
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mod macros;
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#[cfg(feature = "servo")] pub mod animation;
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pub mod applicable_declarations;
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#[allow(missing_docs)] // TODO.
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#[cfg(feature = "servo")] pub mod attr;
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pub mod bezier;
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pub mod bloom;
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pub mod context;
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pub mod counter_style;
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pub mod custom_properties;
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pub mod data;
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pub mod dom;
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pub mod dom_apis;
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pub mod driver;
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pub mod element_state;
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#[cfg(feature = "servo")] mod encoding_support;
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pub mod error_reporting;
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pub mod font_face;
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pub mod font_metrics;
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#[cfg(feature = "gecko")] #[allow(unsafe_code)] pub mod gecko;
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#[cfg(feature = "gecko")] #[allow(unsafe_code)] pub mod gecko_bindings;
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pub mod hash;
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pub mod invalidation;
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#[allow(missing_docs)] // TODO.
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pub mod logical_geometry;
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pub mod matching;
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pub mod media_queries;
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pub mod parallel;
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pub mod parser;
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pub mod rule_cache;
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pub mod rule_tree;
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pub mod scoped_tls;
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pub mod selector_map;
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pub mod selector_parser;
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pub mod shared_lock;
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pub mod sharing;
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pub mod style_resolver;
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pub mod stylist;
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#[cfg(feature = "servo")] #[allow(unsafe_code)] pub mod servo;
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pub mod str;
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pub mod style_adjuster;
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pub mod stylesheet_set;
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pub mod stylesheets;
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pub mod thread_state;
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pub mod timer;
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pub mod traversal;
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pub mod traversal_flags;
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#[macro_use]
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#[allow(non_camel_case_types)]
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pub mod values;
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use std::fmt;
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use style_traits::ToCss;
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#[cfg(feature = "gecko")] pub use gecko_string_cache as string_cache;
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#[cfg(feature = "gecko")] pub use gecko_string_cache::Atom;
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#[cfg(feature = "gecko")] pub use gecko_string_cache::Namespace;
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#[cfg(feature = "gecko")] pub use gecko_string_cache::Atom as Prefix;
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#[cfg(feature = "gecko")] pub use gecko_string_cache::Atom as LocalName;
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#[cfg(feature = "servo")] pub use servo_atoms::Atom;
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#[cfg(feature = "servo")] pub use html5ever::Prefix;
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#[cfg(feature = "servo")] pub use html5ever::LocalName;
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#[cfg(feature = "servo")] pub use html5ever::Namespace;
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/// The CSS properties supported by the style system.
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/// Generated from the properties.mako.rs template by build.rs
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#[macro_use]
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#[allow(unsafe_code)]
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#[deny(missing_docs)]
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pub mod properties {
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include!(concat!(env!("OUT_DIR"), "/properties.rs"));
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}
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#[cfg(feature = "gecko")]
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#[allow(unsafe_code, missing_docs)]
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pub mod gecko_properties {
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include!(concat!(env!("OUT_DIR"), "/gecko_properties.rs"));
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}
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macro_rules! reexport_computed_values {
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( $( { $name: ident, $boxed: expr } )+ ) => {
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/// Types for [computed values][computed].
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///
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/// [computed]: https://drafts.csswg.org/css-cascade/#computed
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pub mod computed_values {
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$(
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pub use properties::longhands::$name::computed_value as $name;
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)+
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// Don't use a side-specific name needlessly:
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pub use properties::longhands::border_top_style::computed_value as border_style;
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}
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}
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}
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longhand_properties_idents!(reexport_computed_values);
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/// Serializes as CSS a comma-separated list of any `T` that supports being
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/// serialized as CSS.
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pub fn serialize_comma_separated_list<W, T>(dest: &mut W,
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list: &[T])
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-> fmt::Result
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where W: fmt::Write,
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T: ToCss,
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{
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if list.is_empty() {
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return Ok(());
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}
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list[0].to_css(dest)?;
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for item in list.iter().skip(1) {
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dest.write_str(", ")?;
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item.to_css(dest)?;
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}
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Ok(())
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}
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#[cfg(feature = "gecko")] use gecko_string_cache::WeakAtom;
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#[cfg(feature = "servo")] use servo_atoms::Atom as WeakAtom;
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/// Extension methods for selectors::attr::CaseSensitivity
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pub trait CaseSensitivityExt {
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/// Return whether two atoms compare equal according to this case sensitivity.
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fn eq_atom(self, a: &WeakAtom, b: &WeakAtom) -> bool;
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}
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impl CaseSensitivityExt for selectors::attr::CaseSensitivity {
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fn eq_atom(self, a: &WeakAtom, b: &WeakAtom) -> bool {
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match self {
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selectors::attr::CaseSensitivity::CaseSensitive => a == b,
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selectors::attr::CaseSensitivity::AsciiCaseInsensitive => a.eq_ignore_ascii_case(b),
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}
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}
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}
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