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metrics: Simplify ProgressiveWebMetrics (#35985)

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Simply how `ProgressiveWebMetrics` works:

1. Keep only a single struct instead of one in layout and one script
   that both implement the `ProgressiveWebMetrics` trait. Since layout
   and script are the same thread these can now just be a single
   `ProgressiveWebMetrics` struct stored in script.
2. Have the compositor be responsible for informing the Constellation
   (which informs the ScripThread) about paint metrics. This makes
   communication flow one way and removes one dependency between the
   compositor and script (of two).
3. All units tests are moved into the `metrics` crate itself since there
   is only one struct there now.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
This commit is contained in:
Martin Robinson 2025-03-21 15:55:00 +01:00 • committed by GitHub
parent 1f232eb17c
commit 5424479768
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26 changed files with 416 additions and 787 deletions
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6
components/shared/script_layout/lib.rs
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@ -18,7 +18,6 @@ use std::sync::atomic::{AtomicIsize, AtomicU64, Ordering};
use app_units::Au;
use atomic_refcell::AtomicRefCell;
use base::Epoch;
use base::cross_process_instant::CrossProcessInstant;
use base::id::{BrowsingContextId, PipelineId, WebViewId};
use canvas_traits::canvas::{CanvasId, CanvasMsg};
use euclid::Size2D;
@ -28,7 +27,6 @@ use fonts::{FontContext, SystemFontServiceProxy};
use ipc_channel::ipc::IpcSender;
use libc::c_void;
use malloc_size_of_derive::MallocSizeOf;
use metrics::PaintTimeMetrics;
use net_traits::image_cache::{ImageCache, PendingImageId};
use profile_traits::mem::Report;
use profile_traits::time;
@ -189,7 +187,6 @@ pub struct LayoutConfig {
pub font_context: Arc<FontContext>,
pub time_profiler_chan: time::ProfilerChan,
pub compositor_api: CrossProcessCompositorApi,
pub paint_time_metrics: PaintTimeMetrics,
pub window_size: WindowSizeData,
}
@ -245,9 +242,6 @@ pub trait Layout {
/// Set the scroll states of this layout after a compositor scroll.
fn set_scroll_offsets(&mut self, scroll_states: &[ScrollState]);
/// Set the paint time for a specific epoch.
fn set_epoch_paint_time(&mut self, epoch: Epoch, paint_time: CrossProcessInstant);
fn query_content_box(&self, node: OpaqueNode) -> Option<Rect<Au>>;
fn query_content_boxes(&self, node: OpaqueNode) -> Vec<Rect<Au>>;
fn query_client_rect(&self, node: OpaqueNode) -> Rect<i32>;