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compositor: Request reflow when doing a page zooming (#38166)

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Request a reflow when doing page zoom and only modify the scaling of the
WebView scene after the first root pipeline display list with the new
zoom is ready. In addition:

  - store zoom limits in `Scale` types
  - send `ViewportDetails` along with the display list so that we can
    detect when the root pipeline scale is ready.

Testing: This is quite hard to test as it requires verification that
contents are zoomed appropriately at the right time.
Fixes: #38091.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
This commit is contained in:
Martin Robinson 2025-07-29 12:04:37 +02:00 • committed by GitHub
parent 3d2f0d1be5
commit 8d5faa9bf9
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10 changed files with 111 additions and 44 deletions
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10
components/layout/layout_impl.rs
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@ -75,7 +75,7 @@ use style::{Zero, driver};
use style_traits::{CSSPixel, SpeculativePainter};
use stylo_atoms::Atom;
use url::Url;
use webrender_api::units::{DevicePixel, DevicePoint, LayoutSize, LayoutVector2D};
use webrender_api::units::{DevicePixel, DevicePoint, LayoutVector2D};
use webrender_api::{ExternalScrollId, HitTestFlags};
use crate::context::{CachedImageOrError, ImageResolver, LayoutContext};
@ -960,12 +960,6 @@ impl LayoutThread {
return;
}
let viewport_size = self.stylist.device().au_viewport_size();
let viewport_size = LayoutSize::new(
viewport_size.width.to_f32_px(),
viewport_size.height.to_f32_px(),
);
let mut stacking_context_tree = self.stacking_context_tree.borrow_mut();
let old_scroll_offsets = stacking_context_tree
.as_ref()
@ -976,7 +970,7 @@ impl LayoutThread {
// applicable spatial and clip nodes.
let mut new_stacking_context_tree = StackingContextTree::new(
fragment_tree,
viewport_size,
reflow_request.viewport_details,
self.id.into(),
!self.have_ever_generated_display_list.get(),
&self.debug,