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105 lines
3.4 KiB
Rust
105 lines
3.4 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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//! The context within which style is calculated.
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use animation::Animation;
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use app_units::Au;
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use bloom::StyleBloom;
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use dom::{OpaqueNode, TElement};
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use error_reporting::ParseErrorReporter;
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use euclid::Size2D;
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use matching::StyleSharingCandidateCache;
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use parking_lot::RwLock;
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use std::collections::HashMap;
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use std::sync::{Arc, Mutex};
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use std::sync::mpsc::Sender;
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use stylist::Stylist;
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use timer::Timer;
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/// This structure is used to create a local style context from a shared one.
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pub struct ThreadLocalStyleContextCreationInfo {
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new_animations_sender: Sender<Animation>,
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}
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impl ThreadLocalStyleContextCreationInfo {
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pub fn new(animations_sender: Sender<Animation>) -> Self {
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ThreadLocalStyleContextCreationInfo {
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new_animations_sender: animations_sender,
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}
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}
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}
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#[derive(PartialEq, Eq, Copy, Clone, Hash, Debug)]
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#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
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pub enum QuirksMode {
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Quirks,
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LimitedQuirks,
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NoQuirks,
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}
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pub struct SharedStyleContext {
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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>,
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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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/// Data needed to create the thread-local style context from the shared one.
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pub local_context_creation_data: Mutex<ThreadLocalStyleContextCreationInfo>,
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/// The current timer for transitions and animations. This is needed to test
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/// them.
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pub timer: Timer,
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/// The QuirksMode state which the document needs to be rendered with
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pub quirks_mode: QuirksMode,
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}
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pub struct ThreadLocalStyleContext<E: TElement> {
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pub style_sharing_candidate_cache: StyleSharingCandidateCache<E>,
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pub bloom_filter: StyleBloom<E>,
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/// A channel on which new animations that have been triggered by style
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/// recalculation can be sent.
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pub new_animations_sender: Sender<Animation>,
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}
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impl<E: TElement> ThreadLocalStyleContext<E> {
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pub fn new(shared: &SharedStyleContext) -> Self {
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ThreadLocalStyleContext {
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style_sharing_candidate_cache: StyleSharingCandidateCache::new(),
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bloom_filter: StyleBloom::new(),
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new_animations_sender: shared.local_context_creation_data.lock().unwrap().new_animations_sender.clone(),
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}
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}
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}
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pub struct StyleContext<'a, E: TElement + 'a> {
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pub shared: &'a SharedStyleContext,
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pub thread_local: &'a mut ThreadLocalStyleContext<E>,
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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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