зеркало из https://github.com/mozilla/gecko-dev.git
68 строки
2.4 KiB
Rust
68 строки
2.4 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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use animation::Animation;
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use app_units::Au;
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use dom::OpaqueNode;
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use error_reporting::ParseErrorReporter;
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use euclid::Size2D;
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use matching::{ApplicableDeclarationsCache, StyleSharingCandidateCache};
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use properties::ComputedValues;
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use selector_impl::SelectorImplExt;
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use selector_matching::Stylist;
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use std::cell::RefCell;
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use std::collections::HashMap;
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use std::sync::mpsc::Sender;
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use std::sync::{Arc, Mutex, RwLock};
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pub struct SharedStyleContext<Impl: SelectorImplExt> {
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/// The current viewport size.
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pub viewport_size: Size2D<Au>,
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/// Screen sized changed?
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pub screen_size_changed: bool,
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/// The CSS selector stylist.
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pub stylist: Arc<Stylist<Impl>>,
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/// Starts at zero, and increased by one every time a layout completes.
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/// This can be used to easily check for invalid stale data.
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pub generation: u32,
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/// A channel on which new animations that have been triggered by style recalculation can be
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/// sent.
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pub new_animations_sender: Mutex<Sender<Animation>>,
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/// Why is this reflow occurring
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pub goal: ReflowGoal,
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/// The animations that are currently running.
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pub running_animations: Arc<RwLock<HashMap<OpaqueNode, Vec<Animation>>>>,
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/// The list of animations that have expired since the last style recalculation.
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pub expired_animations: Arc<RwLock<HashMap<OpaqueNode, Vec<Animation>>>>,
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///The CSS error reporter for all CSS loaded in this layout thread
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pub error_reporter: Box<ParseErrorReporter + Sync>,
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}
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pub struct LocalStyleContext<C: ComputedValues> {
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pub applicable_declarations_cache: RefCell<ApplicableDeclarationsCache<C>>,
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pub style_sharing_candidate_cache: RefCell<StyleSharingCandidateCache<C>>,
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}
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pub trait StyleContext<'a, Impl: SelectorImplExt> {
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fn shared_context(&self) -> &'a SharedStyleContext<Impl>;
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fn local_context(&self) -> &LocalStyleContext<Impl::ComputedValues>;
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}
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/// Why we're doing reflow.
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#[derive(PartialEq, Copy, Clone, Debug)]
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pub enum ReflowGoal {
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/// We're reflowing in order to send a display list to the screen.
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ForDisplay,
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/// We're reflowing in order to satisfy a script query. No display list will be created.
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ForScriptQuery,
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}
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