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| Original file line number | Diff line number | Diff line change |
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| /* This Source Code Form is subject to the terms of the Mozilla Public | ||
| * License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| * file, You can obtain one at https://mozilla.org/MPL/2.0/. */ | ||
|
|
||
| //! CSS transitions and animations. | ||
|
|
||
| use crate::context::LayoutContext; | ||
| use crate::display_list::items::OpaqueNode; | ||
| use crate::flow::{Flow, GetBaseFlow}; | ||
| use crate::opaque_node::OpaqueNodeMethods; | ||
| use crossbeam_channel::Receiver; | ||
| use fxhash::{FxHashMap, FxHashSet}; | ||
| use ipc_channel::ipc::IpcSender; | ||
| use msg::constellation_msg::PipelineId; | ||
| use script_traits::UntrustedNodeAddress; | ||
| use script_traits::{AnimationState, ConstellationControlMsg, LayoutMsg as ConstellationMsg}; | ||
| use style::animation::{update_style_for_animation, Animation}; | ||
| use style::dom::TElement; | ||
| use style::font_metrics::ServoMetricsProvider; | ||
| use style::selector_parser::RestyleDamage; | ||
| use style::timer::Timer; | ||
|
|
||
| /// Processes any new animations that were discovered after style recalculation. | ||
| /// Also expire any old animations that have completed, inserting them into | ||
| /// `expired_animations`. | ||
| pub fn update_animation_state<E>( | ||
| constellation_chan: &IpcSender<ConstellationMsg>, | ||
| script_chan: &IpcSender<ConstellationControlMsg>, | ||
| running_animations: &mut FxHashMap<OpaqueNode, Vec<Animation>>, | ||
| expired_animations: &mut FxHashMap<OpaqueNode, Vec<Animation>>, | ||
| mut keys_to_remove: FxHashSet<OpaqueNode>, | ||
| mut newly_transitioning_nodes: Option<&mut Vec<UntrustedNodeAddress>>, | ||
| new_animations_receiver: &Receiver<Animation>, | ||
| pipeline_id: PipelineId, | ||
| timer: &Timer, | ||
| ) where | ||
| E: TElement, | ||
| { | ||
| let mut new_running_animations = vec![]; | ||
| while let Ok(animation) = new_animations_receiver.try_recv() { | ||
| let mut should_push = true; | ||
| if let Animation::Keyframes(ref node, _, ref name, ref state) = animation { | ||
| // If the animation was already present in the list for the | ||
| // node, just update its state, else push the new animation to | ||
| // run. | ||
| if let Some(ref mut animations) = running_animations.get_mut(node) { | ||
| // TODO: This being linear is probably not optimal. | ||
| for anim in animations.iter_mut() { | ||
| if let Animation::Keyframes(_, _, ref anim_name, ref mut anim_state) = *anim { | ||
| if *name == *anim_name { | ||
| debug!("update_animation_state: Found other animation {}", name); | ||
| anim_state.update_from_other(&state, timer); | ||
| should_push = false; | ||
| break; | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| if should_push { | ||
| new_running_animations.push(animation); | ||
| } | ||
| } | ||
|
|
||
| if running_animations.is_empty() && new_running_animations.is_empty() { | ||
| // Nothing to do. Return early so we don't flood the compositor with | ||
| // `ChangeRunningAnimationsState` messages. | ||
| return; | ||
| } | ||
|
|
||
| let now = timer.seconds(); | ||
| // Expire old running animations. | ||
| // | ||
| // TODO: Do not expunge Keyframes animations, since we need that state if | ||
| // the animation gets re-triggered. Probably worth splitting in two | ||
| // different maps, or at least using a linked list? | ||
| for (key, running_animations) in running_animations.iter_mut() { | ||
| let mut animations_still_running = vec![]; | ||
| for mut running_animation in running_animations.drain(..) { | ||
| let still_running = !running_animation.is_expired() && | ||
| match running_animation { | ||
| Animation::Transition(_, started_at, ref frame) => { | ||
| now < started_at + frame.duration | ||
| }, | ||
| Animation::Keyframes(_, _, _, ref mut state) => { | ||
| // This animation is still running, or we need to keep | ||
| // iterating. | ||
| now < state.started_at + state.duration || state.tick() | ||
| }, | ||
| }; | ||
|
|
||
| debug!( | ||
| "update_animation_state({:?}): {:?}", | ||
| still_running, running_animation | ||
| ); | ||
|
|
||
| if still_running { | ||
| animations_still_running.push(running_animation); | ||
| continue; | ||
| } | ||
|
|
||
| if let Animation::Transition(node, _, ref frame) = running_animation { | ||
| script_chan | ||
| .send(ConstellationControlMsg::TransitionEnd( | ||
| node.to_untrusted_node_address(), | ||
| frame.property_animation.property_name().into(), | ||
| frame.duration, | ||
| )) | ||
| .unwrap(); | ||
| } | ||
|
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||
| expired_animations | ||
| .entry(*key) | ||
| .or_insert_with(Vec::new) | ||
| .push(running_animation); | ||
| } | ||
|
|
||
| if animations_still_running.is_empty() { | ||
| keys_to_remove.insert(*key); | ||
| } else { | ||
| *running_animations = animations_still_running | ||
| } | ||
| } | ||
|
|
||
| for key in keys_to_remove { | ||
| running_animations.remove(&key).unwrap(); | ||
| } | ||
|
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||
| // Add new running animations. | ||
| for new_running_animation in new_running_animations { | ||
| if new_running_animation.is_transition() { | ||
| match newly_transitioning_nodes { | ||
| Some(ref mut nodes) => { | ||
| nodes.push(new_running_animation.node().to_untrusted_node_address()); | ||
| }, | ||
| None => { | ||
| warn!("New transition encountered from compositor-initiated layout."); | ||
| }, | ||
| } | ||
| } | ||
|
|
||
| running_animations | ||
| .entry(*new_running_animation.node()) | ||
| .or_insert_with(Vec::new) | ||
| .push(new_running_animation) | ||
| } | ||
|
|
||
| let animation_state = if running_animations.is_empty() { | ||
| AnimationState::NoAnimationsPresent | ||
| } else { | ||
| AnimationState::AnimationsPresent | ||
| }; | ||
|
|
||
| constellation_chan | ||
| .send(ConstellationMsg::ChangeRunningAnimationsState( | ||
| pipeline_id, | ||
| animation_state, | ||
| )) | ||
| .unwrap(); | ||
| } | ||
|
|
||
| /// Recalculates style for a set of animations. This does *not* run with the DOM | ||
| /// lock held. Returns a set of nodes associated with animations that are no longer | ||
| /// valid. | ||
| pub fn recalc_style_for_animations<E>( | ||
| context: &LayoutContext, | ||
| flow: &mut dyn Flow, | ||
| animations: &FxHashMap<OpaqueNode, Vec<Animation>>, | ||
| ) -> FxHashSet<OpaqueNode> | ||
| where | ||
| E: TElement, | ||
| { | ||
| let mut invalid_nodes = animations.keys().cloned().collect(); | ||
| do_recalc_style_for_animations::<E>(context, flow, animations, &mut invalid_nodes); | ||
| invalid_nodes | ||
| } | ||
|
|
||
| fn do_recalc_style_for_animations<E>( | ||
| context: &LayoutContext, | ||
| flow: &mut dyn Flow, | ||
| animations: &FxHashMap<OpaqueNode, Vec<Animation>>, | ||
| invalid_nodes: &mut FxHashSet<OpaqueNode>, | ||
| ) where | ||
| E: TElement, | ||
| { | ||
| let mut damage = RestyleDamage::empty(); | ||
| flow.mutate_fragments(&mut |fragment| { | ||
| if let Some(ref animations) = animations.get(&fragment.node) { | ||
| invalid_nodes.remove(&fragment.node); | ||
| for animation in animations.iter() { | ||
| let old_style = fragment.style.clone(); | ||
| update_style_for_animation::<E>( | ||
| &context.style_context, | ||
| animation, | ||
| &mut fragment.style, | ||
| &ServoMetricsProvider, | ||
| ); | ||
| let difference = | ||
| RestyleDamage::compute_style_difference(&old_style, &fragment.style); | ||
| damage |= difference.damage; | ||
| } | ||
| } | ||
| }); | ||
|
|
||
| let base = flow.mut_base(); | ||
| base.restyle_damage.insert(damage); | ||
| for kid in base.children.iter_mut() { | ||
| do_recalc_style_for_animations::<E>(context, kid, animations, invalid_nodes) | ||
| } | ||
| } |
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