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constellation: Stop assuming that the viewport is shared by all WebViews (#36312)

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The `Constellation` previously held a `window_size` member, but this
assumes that all `WebView`s have the same size. This change removes that
assumption as well as making sure that all `WebView`s pass their size
and HiDIP scaling to the `Constellation` when they are created.

In addition

- `WindowSizeData` is renamed to `ViewportDetails`, as it was
holding more than just the size and it didn't necessarily correspond to
  a "window." It's used for tracking viewport data, whether for an
  `<iframe>` or the main `WebView` viewport.
- `ViewportDetails` is stored more consistently so that conceptually an
  `<iframe>` can also have its own HiDPI scaling. This isn't something
  we necessarily want, but it makes everything conceptually simpler.

The goal with this change is to work toward allowing per-`WebView` HiDPI
scaling and sizing. There are still some corresponding changes in the
compositor to make that happen, but they will in a subsequent change.

Testing: This is covered by existing tests. There should be no behavior
changes.
Fixes: This is part of #36232.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
This commit is contained in:
Martin Robinson 2025-04-04 19:06:34 +02:00 • committed by GitHub
parent 7c89e24f34
commit fb344ba4e9
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26 changed files with 272 additions and 256 deletions
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19
components/shared/embedder/lib.rs
View file

@ -19,6 +19,7 @@ use std::sync::Arc;
use base::id::{PipelineId, WebViewId};
use crossbeam_channel::Sender;
use euclid::{Scale, Size2D};
use http::{HeaderMap, Method, StatusCode};
use ipc_channel::ipc::IpcSender;
pub use keyboard_types::{KeyboardEvent, Modifiers};
@ -29,8 +30,9 @@ use pixels::Image;
use serde::{Deserialize, Serialize};
use servo_url::ServoUrl;
use strum_macros::IntoStaticStr;
use style_traits::CSSPixel;
use url::Url;
use webrender_api::units::{DeviceIntPoint, DeviceIntRect, DeviceIntSize};
use webrender_api::units::{DeviceIntPoint, DeviceIntRect, DeviceIntSize, DevicePixel};
pub use crate::input_events::*;
pub use crate::webdriver::*;
@ -224,7 +226,6 @@ pub enum AllowOrDeny {
}
#[derive(Clone, Debug, Deserialize, Serialize)]
pub struct SelectElementOption {
/// A unique identifier for the option that can be used to select it.
pub id: usize,
@ -244,6 +245,18 @@ pub enum SelectElementOptionOrOptgroup {
},
}
/// Data about a `WebView` or `<iframe>` viewport: its size and also the
/// HiDPI scale factor to use when rendering the contents.
#[derive(Clone, Copy, Debug, Default, Deserialize, MallocSizeOf, PartialEq, Serialize)]
pub struct ViewportDetails {
/// The size of the layout viewport.
pub size: Size2D<f32, CSSPixel>,
/// The scale factor to use to account for HiDPI scaling. This does not take into account
/// any page or pinch zoom applied by the compositor to the contents.
pub hidpi_scale_factor: Scale<f32, CSSPixel, DevicePixel>,
}
#[derive(Deserialize, IntoStaticStr, Serialize)]
pub enum EmbedderMsg {
/// A status message to be displayed by the browser chrome.
@ -275,7 +288,7 @@ pub enum EmbedderMsg {
/// Whether or not to allow a pipeline to load a url.
AllowNavigationRequest(WebViewId, PipelineId, ServoUrl),
/// Whether or not to allow script to open a new tab/browser
AllowOpeningWebView(WebViewId, IpcSender<Option<WebViewId>>),
AllowOpeningWebView(WebViewId, IpcSender<Option<(WebViewId, ViewportDetails)>>),
/// A webview was destroyed.
WebViewClosed(WebViewId),
/// A webview gained focus for keyboard events.