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refactor(servo): extract paint coordination into runtime_paint

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`runtime.rs` had grown past the 500-line ceiling enforced by
`scripts/audit_source_lines.sh` once the grid-pref comment landed (522
lines). Peel the repaint/present pair — `paint_without_readback`,
`paint_without_readback_with_completion`, the private `paint_webview`,
and `paint_with_readback` — into a sibling `runtime_paint.rs`, exactly
the `paint.rs` boundary the embedding architecture doc prescribes.

`runtime_paint` is a child module of `runtime` (declared via `#[path]`,
mirroring `runtime_context`), so it keeps access to the private
`SoftwareServoHost` fields and the `webview()` / `wait_for_paint_completion`
/ `read_rendered_frame` helpers without widening any visibility. No
behaviour change: public API and call sites are identical.

runtime.rs 522 -> 469 lines. Build + clippy clean; full workspace test
suite green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
ZacharyZhang-NY
2026-05-29 13:17:00 -04:00
co-authored by Claude Opus 4.8
parent 3d36cb25bf
commit b1fd8ab3f8
2 changed files with 70 additions and 55 deletions
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crates/ely_servo_host/src/runtime.rs
+2 -55
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@@ -19,6 +19,8 @@ use servo::{
#[path = "runtime_context.rs"]
mod runtime_context;
#[path = "runtime_paint.rs"]
mod runtime_paint;
use runtime_context::hidpi_scale_from_factor;
pub use runtime_context::{RenderingContextKind, ServoSurfaceSize};
@@ -109,19 +111,6 @@ impl SoftwareServoHost {
self.create_webview_in_context(tab_id, profile_id, handles)
}
/// Paint and present the current surface without RGBA readback.
pub fn paint_without_readback(&mut self, webview_id: &WebViewId) -> Result<(), ServoHostError> {
self.paint_without_readback_with_completion(webview_id, true)
}
pub fn paint_without_readback_with_completion(
&mut self,
webview_id: &WebViewId,
wait_for_completion: bool,
) -> Result<(), ServoHostError> {
self.paint_webview(webview_id, false, wait_for_completion).map(|_| ())
}
pub fn close_webview(&mut self, webview_id: &WebViewId) -> bool {
let Some(webview) = self.webviews.remove(webview_id) else {
return false;
@@ -173,48 +162,6 @@ impl SoftwareServoHost {
})
}
fn paint_webview(
&mut self,
webview_id: &WebViewId,
capture_frame: bool,
wait_for_completion: bool,
) -> Result<Option<RenderedFrame>, ServoHostError> {
let rendering_context = self.webview(webview_id)?.rendering_context.clone();
rendering_context.make_current().map_err(|_| ServoHostError::RenderingContextNotCurrent)?;
rendering_context.prepare_for_rendering();
// Clear the pending-frame flag before `paint()` so barrier callers observe
// the next Servo frame-ready notification for this paint.
{
let webview = self.webview(webview_id)?;
webview.delegate.mark_frame_presented();
webview.webview.paint();
}
if wait_for_completion {
self.wait_for_paint_completion(webview_id);
}
let rendered_frame = if capture_frame {
Some(Self::read_rendered_frame(rendering_context.as_ref())?)
} else {
None
};
rendering_context.present();
self.webview(webview_id)?.delegate.mark_frame_presented();
Ok(rendered_frame)
}
pub fn paint_with_readback(
&mut self,
webview_id: &WebViewId,
wait_for_completion: bool,
) -> Result<(), ServoHostError> {
let Some(rendered_frame) = self.paint_webview(webview_id, true, wait_for_completion)?
else {
return Err(ServoHostError::RenderedFrameUnavailable);
};
self.last_rendered_frame = Some(rendered_frame);
Ok(())
}
/// Returns the current snapshot and acknowledges metadata-only
/// updates without clearing Servo's frame-ready signal.
pub fn snapshot_and_mark_metadata_observed(