mirror of
https://github.com/servo/servo.git
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105 lines
3.7 KiB
Rust
105 lines
3.7 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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use euclid::size::TypedSize2D;
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use gecko_bindings::bindings::RawServoStyleSet;
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use gecko_bindings::sugar::ownership::{HasBoxFFI, HasFFI, HasSimpleFFI};
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use num_cpus;
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use std::cmp;
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use std::collections::HashMap;
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use std::env;
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use std::sync::{Arc, RwLock};
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use std::sync::mpsc::{Receiver, Sender, channel};
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use style::animation::Animation;
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use style::context::SharedStyleContext;
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use style::dom::OpaqueNode;
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use style::media_queries::{Device, MediaType};
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use style::parallel::WorkQueueData;
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use style::selector_matching::Stylist;
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use style::stylesheets::Stylesheet;
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use style::thread_state;
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use style::workqueue::WorkQueue;
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use style_traits::ViewportPx;
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pub struct PerDocumentStyleData {
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/// Rule processor.
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pub stylist: Arc<Stylist>,
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/// List of stylesheets, mirrored from Gecko.
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pub stylesheets: Vec<Arc<Stylesheet>>,
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/// Whether the stylesheets list above has changed since the last restyle.
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pub stylesheets_changed: bool,
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// FIXME(bholley): Hook these up to something.
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pub new_animations_sender: Sender<Animation>,
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pub new_animations_receiver: Receiver<Animation>,
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pub running_animations: Arc<RwLock<HashMap<OpaqueNode, Vec<Animation>>>>,
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pub expired_animations: Arc<RwLock<HashMap<OpaqueNode, Vec<Animation>>>>,
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// FIXME(bholley): This shouldn't be per-document.
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pub work_queue: Option<WorkQueue<SharedStyleContext, WorkQueueData>>,
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pub num_threads: usize,
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}
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lazy_static! {
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pub static ref NUM_THREADS: usize = {
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match env::var("STYLO_THREADS").map(|s| s.parse::<usize>().expect("invalid STYLO_THREADS")) {
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Ok(num) => num,
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_ => cmp::max(num_cpus::get() * 3 / 4, 1),
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}
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};
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}
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impl PerDocumentStyleData {
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pub fn new() -> PerDocumentStyleData {
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// FIXME(bholley): Real window size.
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let window_size: TypedSize2D<f32, ViewportPx> = TypedSize2D::new(800.0, 600.0);
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let device = Device::new(MediaType::Screen, window_size);
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let (new_anims_sender, new_anims_receiver) = channel();
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PerDocumentStyleData {
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stylist: Arc::new(Stylist::new(device)),
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stylesheets: vec![],
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stylesheets_changed: true,
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new_animations_sender: new_anims_sender,
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new_animations_receiver: new_anims_receiver,
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running_animations: Arc::new(RwLock::new(HashMap::new())),
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expired_animations: Arc::new(RwLock::new(HashMap::new())),
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work_queue: if *NUM_THREADS <= 1 {
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None
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} else {
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WorkQueue::new("StyleWorker", thread_state::LAYOUT, *NUM_THREADS).ok()
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},
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num_threads: *NUM_THREADS,
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}
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}
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pub fn flush_stylesheets(&mut self) {
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// The stylist wants to be flushed if either the stylesheets change or the
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// device dimensions change. When we add support for media queries, we'll
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// need to detect the latter case and trigger a flush as well.
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if self.stylesheets_changed {
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let _ = Arc::get_mut(&mut self.stylist).unwrap()
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.update(&self.stylesheets, None, true);
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self.stylesheets_changed = false;
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}
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}
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}
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unsafe impl HasFFI for PerDocumentStyleData {
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type FFIType = RawServoStyleSet;
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}
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unsafe impl HasSimpleFFI for PerDocumentStyleData {}
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unsafe impl HasBoxFFI for PerDocumentStyleData {}
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impl Drop for PerDocumentStyleData {
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fn drop(&mut self) {
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if let Some(ref mut queue) = self.work_queue {
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queue.shutdown();
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}
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}
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}
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