Greg Pomerantz
8f06b85376
The 'callback arrives 3-6 ms late' model that invalidated render-ahead in earlier sessions was a mislabeled STG field: the Choreographer callback actually fires at edge+0.5 ms (measured from the VSYNC ftn/mon pair). With the wake ON the edge, the held frame presented at render START lands at edge+~1.5 ms (constant phase, 4 ms of deadline margin), and render spikes (5-10 ms, the measured cause of the residual 1% drops + 1.5 ms phase spread) only stretch the PREPARE phase of the frame held for the NEXT slot — spikes stop delaying visible frames. - lib.rs: RENDER_AHEAD_ACTIVE = locked again (was false) - lib.rs/stg.rs: IT lines gain rcpu (CPU us inside do_render) — spike classifier: rcpu≈render ⇒ Skia/driver CPU work; rcpu≪render ⇒ blocked on GPU/driver - hypotheses-120hz.md: model correction + sltest baseline + results Emulator behavior verified: scroll, settle (transition flush), mid-drag pause/resume (no black window), no AlreadyAcquired panics, held-frame presents at 0.6-2.1 ms. Phone cadence measurement pending (phone out for user use ~2h).
505 lines
24 KiB
Rust
505 lines
24 KiB
Rust
// Copyright © SixtyFPS GmbH <info@slint.dev>
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// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-2.0 OR LicenseRef-Slint-Software-3.0
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// cSpell: ignore androidwindowadapter javahelper
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#![doc = include_str!("README.md")]
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#![doc(html_logo_url = "https://slint.dev/logo/slint-logo-square-light.svg")]
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#![cfg_attr(not(target_os = "android"), allow(rustdoc::broken_intra_doc_links))]
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#![cfg(target_os = "android")]
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#![cfg_attr(slint_nightly_test, feature(non_exhaustive_omitted_patterns_lint))]
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#![cfg_attr(slint_nightly_test, warn(non_exhaustive_omitted_patterns))]
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mod androidwindowadapter;
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mod javahelper;
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mod vsync;
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pub mod stg;
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#[cfg(all(not(feature = "aa-06"), feature = "aa-05"))]
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pub use android_activity_05 as android_activity;
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#[cfg(feature = "aa-06")]
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pub use android_activity_06 as android_activity;
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#[cfg(all(not(feature = "aa-06"), feature = "aa-05"))]
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use ndk_08 as ndk;
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#[cfg(feature = "aa-06")]
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use ndk_09 as ndk;
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pub use android_activity::AndroidApp;
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use android_activity::PollEvent;
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use androidwindowadapter::AndroidWindowAdapter;
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use core::ops::ControlFlow;
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use core::time::Duration;
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use i_slint_core::api::{EventLoopError, PlatformError};
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use i_slint_core::platform::{Clipboard, WindowAdapter};
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use i_slint_renderer_skia::SkiaRendererExt;
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use std::cell::RefCell;
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use std::rc::{Rc, Weak};
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use std::sync::{Arc, Mutex};
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thread_local! {
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static CURRENT_WINDOW: RefCell<Weak<AndroidWindowAdapter>> = RefCell::new(Default::default());
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}
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pub struct AndroidPlatform {
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app: AndroidApp,
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window: Rc<AndroidWindowAdapter>,
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event_listener: Option<Box<dyn Fn(&PollEvent<'_>)>>,
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context: core::cell::OnceCell<i_slint_core::SlintContextWeak>,
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}
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impl AndroidPlatform {
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/// Instantiate a new Android backend given the [`android_activity::AndroidApp`]
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///
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/// Pass the returned value to [`slint::platform::set_platform()`](`i_slint_core::platform::set_platform()`)
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///
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/// # Example
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/// ```
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/// #[cfg(target_os = "android")]
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/// #[unsafe(no_mangle)]
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/// fn android_main(app: i_slint_backend_android_activity::AndroidApp) {
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/// slint::platform::set_platform(Box::new(
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/// i_slint_backend_android_activity::AndroidPlatform::new(app),
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/// ))
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/// .unwrap();
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/// // ... your slint application ...
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/// }
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/// ```
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pub fn new(app: AndroidApp) -> Self {
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let window = AndroidWindowAdapter::new(app.clone());
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CURRENT_WINDOW.set(Rc::downgrade(&window));
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Self { app, window, event_listener: None, context: Default::default() }
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}
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/// Instantiate a new Android backend given the [`android_activity::AndroidApp`]
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/// and a function to process the events.
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///
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/// This is the same as [`AndroidPlatform::new()`], but it allow you to get notified
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/// of events.
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///
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/// Pass the returned value to [`slint::platform::set_platform()`](`i_slint_core::platform::set_platform()`)
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///
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/// # Example
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/// ```
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/// #[cfg(target_os = "android")]
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/// #[unsafe(no_mangle)]
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/// fn android_main(app: i_slint_backend_android_activity::AndroidApp) {
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/// slint::platform::set_platform(Box::new(
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/// i_slint_backend_android_activity::AndroidPlatform::new_with_event_listener(
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/// app,
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/// |event| { eprintln!("got event {event:?}") }
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/// ),
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/// ))
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/// .unwrap();
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/// // ... your slint application ...
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/// }
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/// ```
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pub fn new_with_event_listener(
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app: AndroidApp,
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listener: impl Fn(&PollEvent<'_>) + 'static,
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) -> Self {
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let mut this = Self::new(app);
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this.event_listener = Some(Box::new(listener));
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this
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}
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}
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impl i_slint_core::platform::Platform for AndroidPlatform {
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fn create_window_adapter(&self) -> Result<Rc<dyn WindowAdapter>, PlatformError> {
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Ok(self.window.clone())
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}
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fn run_event_loop(&self) -> Result<(), PlatformError> {
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let ctx = self
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.context
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.get()
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.and_then(|ctx| ctx.upgrade())
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.expect("the event loop runs inside the context that owns this platform");
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// 120Hz scroll fix (docs/BUGS/scroll-jank-120hz.md): enable the
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// render-ahead pipeline in the wgpu surface. It is only ACTIVE per-
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// frame while `locked` (VSYNC_LOCKED_RENDER && animating); unlocked
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// renders always present immediately. See RENDER_AHEAD / RENDER_AHEAD_ACTIVE.
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i_slint_renderer_skia::wgpu_30_surface::vkprobe::RENDER_AHEAD
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.store(true, std::sync::atomic::Ordering::Relaxed);
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let vsync = vsync::VsyncDriver::new(self.app.create_waker());
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// RENDER_AHEAD flush: tracks the previous iteration's locked state so
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// that when animation ends we do one final render() — which presents
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// the frame held by the render-ahead pipeline (otherwise the last
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// content change would never be displayed).
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let mut prev_locked = false;
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loop {
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let mut timeout = ctx.duration_until_next_timer_update();
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// While animating, the vsync thread wakes this loop at each display refresh
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// so rendering tracks the refresh rate instead of a fixed poll timeout.
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//
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// We also treat an ACTIVE POINTER DRAG as "animating" (see
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// stg::pointer_recently_active): during a direct drag Slint has no
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// physics animation, so has_active_animations() is false and, without
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// this, the loop would sleep until the next timer (16 ms) between
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// pointer events → 16-30 ms frame gaps. Keeping the vsync driver
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// alive makes poll_events wake at each display refresh instead.
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let animating = self.window.window.has_active_animations()
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|| stg::pointer_recently_active();
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vsync.set_animating(animating);
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if animating {
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// When animating (scrolling/flinging), cap the poll timeout to 6ms
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// as a safety net in case a vsync wake is lost. Rendering still
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// only happens when `pending_redraw` is set (content actually
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// changed) — we do NOT force a redraw here, which would waste
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// GPU re-rendering an unchanged scene on every wake.
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let frame_duration = Duration::from_millis(6);
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timeout = Some(timeout.map_or(frame_duration, |x| x.min(frame_duration)));
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}
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// `request_redraw()` only raises the flag, so a request issued outside the
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// poll would otherwise wait here for an unrelated wakeup.
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// EXCEPT in vsync-locked mode: the render is deliberately deferred
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// to the vsync WAKE, so a zero timeout here would busy-spin the
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// loop at ~100 kHz (timeout event, no wake, flag never consumed)
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// for up to 8.3 ms after every input event. Block up to the cap
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// instead and let the wake arrive.
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let pr_before = self.window.pending_redraw.get();
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let locked = stg::VSYNC_LOCKED_RENDER
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.load(std::sync::atomic::Ordering::Relaxed)
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&& animating;
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if pr_before && !locked {
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timeout = Some(Duration::ZERO);
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}
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// Jank-hunt: classify the timeout path to explain the 1451 iters/s
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// busy-spin. ZERO = forced by pending_redraw; CAP = 6 ms anim cap;
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// NATURAL = the next timer (>= ~7 ms).
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if stg::IT_ON.load(std::sync::atomic::Ordering::Relaxed) {
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let to_ms = timeout.map(|d| d.as_secs_f64() * 1000.0).unwrap_or(f64::MAX);
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let kind = if pr_before {
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0
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} else if animating && to_ms <= 6.0 {
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1
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} else {
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2
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};
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stg::note_timeout_class(kind);
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}
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// STG (jank-hunt instrumentation): reset per-iteration marks.
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{
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let pr = stg::S_RENDER_START.load(std::sync::atomic::Ordering::Relaxed);
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let pe = stg::S_RENDER_END.load(std::sync::atomic::Ordering::Relaxed);
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if pr != 0 && pe != 0 {
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stg::S_LAST_RENDER_US
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.store(pe - pr, std::sync::atomic::Ordering::Relaxed);
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}
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}
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let t_start = stg::now_us();
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let timeout_ms = timeout.map(|d| d.as_millis() as u64).unwrap_or(u64::MAX);
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stg::S_START.store(t_start, std::sync::atomic::Ordering::Relaxed);
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stg::S_FIRST_EV.store(0, std::sync::atomic::Ordering::Relaxed);
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stg::S_TIMER_US.store(0, std::sync::atomic::Ordering::Relaxed);
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stg::S_EVENT_US.store(0, std::sync::atomic::Ordering::Relaxed);
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stg::S_N_EVENTS.store(0, std::sync::atomic::Ordering::Relaxed);
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let mut r = Ok(ControlFlow::Continue(()));
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// Jank-hunt / 120Hz: did this poll return because the vsync driver
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// (or any waker) fired? Used to lock rendering to the vsync edge
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// (see the render decision below) instead of rendering in reaction
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// to input events (which arrive at a random phase in the slot and
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// push the present past the ~5.5 ms compositor deadline → every
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// frame shown one vsync late → effective 60 Hz + judder).
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let mut saw_wake = false;
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// H5 (hypotheses-120hz.md): CPU time inside poll_events. wall≫cpu
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// ⇒ the UI thread slept/descheduled while the wake byte was
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// pending (epoll not woken, or the thread lost the CPU); wall≈cpu
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// ⇒ the loop spun inside ALooper.
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let __cpu_p0 = stg::thread_cpu_us();
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self.app.poll_events(timeout, |e| {
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if matches!(e, PollEvent::Wake) {
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saw_wake = true;
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}
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if stg::S_FIRST_EV.load(std::sync::atomic::Ordering::Relaxed) == 0 {
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stg::S_FIRST_EV
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.store(stg::now_us(), std::sync::atomic::Ordering::Relaxed);
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}
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let t3_start = stg::now_us();
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let t3_cpu_start = stg::thread_cpu_us();
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r = self.window.process_event(&e);
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let t3_end = stg::now_us();
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let t3_cpu_end = stg::thread_cpu_us();
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let __dt3 = t3_end - t3_start;
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// Jank-hunt: count wake sources. If WAKE events dominate, the
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// loop is being woken far more often than vsync (120/s) or input,
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// which explains the 1600 iters/s busy-spin.
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match e {
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PollEvent::Wake => { stg::WAKE_COUNT.fetch_add(1, std::sync::atomic::Ordering::Relaxed); }
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PollEvent::Timeout => { stg::TIMEOUT_EV_COUNT.fetch_add(1, std::sync::atomic::Ordering::Relaxed); }
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PollEvent::Main(android_activity::MainEvent::InputAvailable) => {
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stg::INPUT_EV_COUNT.fetch_add(1, std::sync::atomic::Ordering::Relaxed);
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}
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_ => {}
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}
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// Jank-hunt: identify which MainEvent variant causes the big
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// `ev` spikes (pointer input is ~2.5 ms max, so a 20 ms event
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// is something else entirely).
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if __dt3 > 5_000 && stg::IT_ON.load(std::sync::atomic::Ordering::Relaxed) {
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let nm = match e {
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PollEvent::Main(android_activity::MainEvent::InputAvailable) => "Input",
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PollEvent::Main(android_activity::MainEvent::InitWindow { .. }) => "InitWin",
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PollEvent::Main(android_activity::MainEvent::TerminateWindow { .. }) => "TermWin",
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PollEvent::Main(android_activity::MainEvent::WindowResized { .. }) => "WinResized",
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PollEvent::Main(android_activity::MainEvent::RedrawNeeded { .. }) => "RedrawNeeded",
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PollEvent::Main(_) => "Main-other",
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_ => "NonMain",
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};
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stg::log_slow_event(nm, __dt3, t3_cpu_end.saturating_sub(t3_cpu_start));
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}
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stg::S_EVENT_US.fetch_add(__dt3, std::sync::atomic::Ordering::Relaxed);
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stg::S_N_EVENTS.fetch_add(1, std::sync::atomic::Ordering::Relaxed);
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if let Some(event_listener) = &self.event_listener {
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event_listener(&e)
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}
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});
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let t_poll1 = stg::now_us();
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let __poll_cpu = stg::thread_cpu_us().saturating_sub(__cpu_p0);
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let lv1 = stg::lv_snapshot();
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// Unconditionally update timers and animations on every event-loop wakeup
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ctx.update_timers_and_animations();
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let t2 = stg::now_us();
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stg::S_TIMER_US.store(t2 - t_poll1, std::sync::atomic::Ordering::Relaxed);
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stg::S_POLL_END.store(t2, std::sync::atomic::Ordering::Relaxed);
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if r?.is_break() {
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break;
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}
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let mut render_us = 0u64;
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let mut __render_cpu = 0u64;
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// Jank-hunt / 120Hz: vsync-locked rendering (the native-Android
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// model). While animating, input events only MARK the window dirty;
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// the render happens on the next vsync WAKE, so every present
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// starts at a deterministic phase (vsync edge + wake latency) and
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// lands well inside the compositor's ~5.5 ms deadline. Cost: up
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// to one slot of extra input latency.
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let do_render = if locked {
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// Present EVERY vsync while animating (not only on content
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// change): the regular 120 Hz present stream locks the
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// display cadence. Re-rendering unchanged content is cheap
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// with Skia's incremental pipeline.
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//
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// IMPORTANT: do NOT `pending_redraw.take()` here. The render
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// is driven by the vsync wake, but the pending flag also
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// carries the motion events' invalidations. Consuming it
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// here starves the follow-up unlocked iteration (which runs
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// 0.4 ms later, before the next motion event arrives) of
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// anything to render, collapsing the cadence to 60 Hz
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// (one render per two vsyncs). Letting the flag survive
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// means the next iteration renders too; if the content is
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// unchanged the extra render is invisible.
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//
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// FRESHNESS GUARD: with the early waker (vsync.rs), TWO
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// wakes can arrive per slot — the early one (~0.8 ms BEFORE
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// the vsync edge) and the Choreographer's late fallback
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// (~5 ms after it). The first one of each slot renders;
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// the second must NOT (double render = 2× the slot budget =
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// 60 Hz collapse). The intervals (measured):
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// late-after-early = ~5.8 ms → must be REJECTED
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// early-after-late = ~7.5 ms → must be ACCEPTED
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// same-kind = ~8.33 ms → ACCEPTED
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// Threshold `period − 1.5 ms` (≈6.8 ms) sits between 5.8
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// and 7.5 with ~0.7-1.0 ms of jitter margin on both sides.
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// (A 0.7-period threshold rejects early-after-late and a
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// 1.0-period threshold locks the cadence onto the late
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// wakes — both measured to fragment the burst.)
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let __now_ns = i_slint_renderer_skia::wgpu_30_surface::vkprobe::monotonic_ns();
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let __period_ns = i_slint_renderer_skia::wgpu_30_surface::vkprobe::VSYNC_PERIOD_NS
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.load(std::sync::atomic::Ordering::Relaxed);
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let __last = i_slint_renderer_skia::wgpu_30_surface::vkprobe::LAST_RENDER_START_NS
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.load(std::sync::atomic::Ordering::Relaxed);
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let __min_gap = __period_ns.saturating_sub(1_500_000);
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let __fresh = __period_ns == 0
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|| __now_ns.saturating_sub(__last) >= __min_gap;
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if __fresh {
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i_slint_renderer_skia::wgpu_30_surface::vkprobe::LAST_RENDER_START_NS
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.store(__now_ns, std::sync::atomic::Ordering::Relaxed);
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}
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saw_wake && __fresh
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} else {
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self.window.pending_redraw.get()
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};
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if do_render {
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// Locked (vsync-wake) renders leave the flag set so the
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// follow-up unlocked iteration renders too (60 Hz collapse,
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// see the do_render note); unlocked renders consume it.
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if !locked {
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self.window.pending_redraw.take();
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}
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// RENDER_AHEAD (hold-without-present) is DISABLED: the held
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// frame is presented at the start of the NEXT render, i.e.
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// after the next vsync wake's Choreographer latency
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// (measured 3.2–6 ms on this device) plus the present cost —
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// landing at vsync+12.4–15.2 ms against a 13.8 ms latch
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// deadline: a 1.4 ms margin that missed 52% of frames
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// (one slot late) during real slow scrolls. Presenting at
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// the END of the render instead still left 51% one slot
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// late — under the model THEN believed (callback 3-6 ms
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// late). That model was WRONG: the callback fires at
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// edge+0.5 ms (measured, VSYNC mon−ftn). See
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// docs/BUGS/hypotheses-120hz.md.
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//
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// RENDER-AHEAD (re-enabled under the corrected model): the
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// wake arrives ON the edge, so the held frame — presented
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// at the START of this render — lands at edge+~1.5 ms:
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// constant phase, ~4 ms of deadline margin, and render
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// SPIKES (Skia 5-10 ms) stop delaying visible frames: a
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// spike only stretches the PREPARE phase of the frame held
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// for the NEXT slot (presented at the NEXT edge+1.5 ms,
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// same phase). Cost: one slot of constant latency
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// (imperceptible).
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i_slint_renderer_skia::wgpu_30_surface::vkprobe::RENDER_AHEAD_ACTIVE
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.store(locked, std::sync::atomic::Ordering::Relaxed);
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// PRESENT GATE: DISABLED (UI-thread sleep ate the slot
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// budget — history in hypotheses-120hz.md). Reference only.
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i_slint_renderer_skia::wgpu_30_surface::vkprobe::PRESENT_GATE_ON
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.store(false, std::sync::atomic::Ordering::Relaxed);
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stg::S_RENDER_START.store(t2, std::sync::atomic::Ordering::Relaxed);
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// Spike classifier (hypotheses-120hz.md): CPU time inside
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// do_render. rcpu≈render ⇒ Skia/wgpu CPU work; rcpu≪render ⇒
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// blocked on the GPU/driver (queue back-pressure, fences).
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let __rc0 = stg::thread_cpu_us();
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self.window.do_render()?;
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let t3 = stg::now_us();
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stg::S_RENDER_END.store(t3, std::sync::atomic::Ordering::Relaxed);
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render_us = t3 - t2;
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__render_cpu = stg::thread_cpu_us().saturating_sub(__rc0);
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} else {
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stg::S_RENDER_END.store(0, std::sync::atomic::Ordering::Relaxed);
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}
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// RENDER_AHEAD flush (see above): on the locked → unlocked
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// transition, render once more to present the held frame.
|
||
if prev_locked && !locked {
|
||
self.window.pending_redraw.take();
|
||
i_slint_renderer_skia::wgpu_30_surface::vkprobe::RENDER_AHEAD_ACTIVE
|
||
.store(false, std::sync::atomic::Ordering::Relaxed);
|
||
self.window.do_render()?;
|
||
}
|
||
prev_locked = locked;
|
||
if stg::IT_ON.load(std::sync::atomic::Ordering::Relaxed) {
|
||
let first_ev = stg::S_FIRST_EV.load(std::sync::atomic::Ordering::Relaxed);
|
||
let lv2 = stg::lv_snapshot();
|
||
stg::log_iter(
|
||
t_start,
|
||
t_poll1 - t_start,
|
||
stg::S_N_EVENTS.load(std::sync::atomic::Ordering::Relaxed),
|
||
if first_ev == 0 { 0 } else { first_ev - t_start },
|
||
t2 - t_poll1,
|
||
stg::S_EVENT_US.load(std::sync::atomic::Ordering::Relaxed),
|
||
render_us,
|
||
animating,
|
||
timeout_ms,
|
||
lv1,
|
||
lv2,
|
||
stg::flick_snapshot(),
|
||
stg::input_snapshot(),
|
||
stg::timeout_snapshot(),
|
||
stg::wake_snapshot(),
|
||
(locked, saw_wake, pr_before, do_render),
|
||
__poll_cpu,
|
||
__render_cpu,
|
||
);
|
||
}
|
||
}
|
||
Ok(())
|
||
}
|
||
|
||
fn new_event_loop_proxy(&self) -> Option<Box<dyn i_slint_core::platform::EventLoopProxy>> {
|
||
Some(Box::new(AndroidEventLoopProxy {
|
||
event_queue: self.window.event_queue.clone(),
|
||
waker: self.app.create_waker(),
|
||
}))
|
||
}
|
||
|
||
fn set_clipboard_text(&self, text: &str, clipboard: Clipboard) {
|
||
if clipboard == Clipboard::DefaultClipboard {
|
||
self.window
|
||
.java_helper
|
||
.set_clipboard(text)
|
||
.unwrap_or_else(|e| javahelper::print_jni_error(&self.app, e));
|
||
}
|
||
}
|
||
|
||
fn clipboard_text(&self, clipboard: Clipboard) -> Option<String> {
|
||
if clipboard == Clipboard::DefaultClipboard {
|
||
Some(
|
||
self.window
|
||
.java_helper
|
||
.get_clipboard()
|
||
.unwrap_or_else(|e| javahelper::print_jni_error(&self.app, e)),
|
||
)
|
||
} else {
|
||
None
|
||
}
|
||
}
|
||
|
||
fn bind_context(&self, ctx: i_slint_core::SlintContextWeak, _: i_slint_core::InternalToken) {
|
||
let _ = self.context.set(ctx.clone());
|
||
let ctx = ctx.upgrade().expect("bind_context called while the SlintContext is still alive");
|
||
let color_scheme = match self
|
||
.window
|
||
.java_helper
|
||
.color_scheme()
|
||
.unwrap_or_else(|e| javahelper::print_jni_error(&self.app, e))
|
||
{
|
||
0x10 => i_slint_core::items::ColorScheme::Light, // UI_MODE_NIGHT_NO
|
||
0x20 => i_slint_core::items::ColorScheme::Dark, // UI_MODE_NIGHT_YES
|
||
_ => i_slint_core::items::ColorScheme::Unknown,
|
||
};
|
||
ctx.set_color_scheme(color_scheme);
|
||
if let Ok(accent) = self.window.java_helper.accent_color() {
|
||
ctx.set_accent_color(accent);
|
||
}
|
||
if let Ok(scale) = self.window.java_helper.font_scale()
|
||
&& let Some(size) = javahelper::font_scale_to_logical_length(scale)
|
||
{
|
||
ctx.set_platform_default_font_size(Some(size));
|
||
}
|
||
}
|
||
|
||
fn long_press_interval(&self, _: i_slint_core::InternalToken) -> Duration {
|
||
self.window.java_helper.long_press_timeout().unwrap_or(Duration::from_millis(500))
|
||
}
|
||
}
|
||
|
||
enum Event {
|
||
Quit,
|
||
Other(Box<dyn FnOnce() + Send + 'static>),
|
||
}
|
||
|
||
type EventQueue = Arc<Mutex<Vec<Event>>>;
|
||
|
||
struct AndroidEventLoopProxy {
|
||
event_queue: EventQueue,
|
||
waker: android_activity::AndroidAppWaker,
|
||
}
|
||
|
||
impl i_slint_core::platform::EventLoopProxy for AndroidEventLoopProxy {
|
||
fn quit_event_loop(&self) -> Result<(), EventLoopError> {
|
||
self.event_queue.lock().unwrap().push(Event::Quit);
|
||
self.waker.wake();
|
||
Ok(())
|
||
}
|
||
|
||
fn invoke_from_event_loop(
|
||
&self,
|
||
event: Box<dyn FnOnce() + Send>,
|
||
) -> Result<(), EventLoopError> {
|
||
let n = crate::stg::INVK_PUSH_COUNT.fetch_add(1, std::sync::atomic::Ordering::Relaxed) + 1;
|
||
crate::stg::log_line(&format!("INVK n={n}"));
|
||
self.event_queue.lock().unwrap().push(Event::Other(event));
|
||
self.waker.wake();
|
||
Ok(())
|
||
}
|
||
}
|
||
|
||
pub fn set_requested_graphics_api(
|
||
requested_graphics_api: Option<i_slint_core::graphics::RequestedGraphicsAPI>,
|
||
) -> Result<(), PlatformError> {
|
||
let Some(adapter) = CURRENT_WINDOW.with_borrow(|x| x.upgrade()) else {
|
||
return Err(format!("On Android a graphics API for Slint can only be requested after calling slint::android::init()").into());
|
||
};
|
||
adapter.set_requested_graphics_api(requested_graphics_api);
|
||
Ok(())
|
||
}
|