compositor: Make input event handling per-WebView (#35716)

This is another step in the move to having a per-WebView renderer. In
this step event handling is made per-WebView. Most events sent to Servo
are sent via the WebView API already, so this just moves more event
handling code to the per-WebView render portion of the compositor.

- ServoRenderer is given shared ownership and interior mutability as
  it is now shared among all WebView(Renderers).
- Some messages coming from other parts of Servo must now carry a
  WebViewId as well so that they can be associated with a particular
  WebView.
- There needs to be some reorganization of `ServoRenderer` in order to
  avoid issues with double borrow of `RefCells`.

Signed-off-by: Delan Azabani <dazabani@igalia.com>
Co-authored-by: Martin Robinson <mrobinson@igalia.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/components/shared/compositing/lib.rs b/components/shared/compositing/lib.rs
index 737b105b1ba..ddca92a3c57 100644
--- a/components/shared/compositing/lib.rs
+++ b/components/shared/compositing/lib.rs
@@ -65,7 +65,7 @@ pub enum CompositorMsg {
     /// Remove a webview.
     RemoveWebView(TopLevelBrowsingContextId),
     /// Script has handled a touch event, and either prevented or allowed default actions.
-    TouchEventProcessed(TouchEventResult),
+    TouchEventProcessed(WebViewId, TouchEventResult),
     /// Composite to a PNG file and return the Image over a passed channel.
     CreatePng(Option<Rect<f32, CSSPixel>>, IpcSender<Option<Image>>),
     /// A reply to the compositor asking if the output image is stable.
@@ -89,9 +89,9 @@ pub enum CompositorMsg {
     /// The load of a page has completed
     LoadComplete(TopLevelBrowsingContextId),
     /// WebDriver mouse button event
-    WebDriverMouseButtonEvent(MouseButtonAction, MouseButton, f32, f32),
+    WebDriverMouseButtonEvent(WebViewId, MouseButtonAction, MouseButton, f32, f32),
     /// WebDriver mouse move event
-    WebDriverMouseMoveEvent(f32, f32),
+    WebDriverMouseMoveEvent(WebViewId, f32, f32),
 
     /// Messages forwarded to the compositor by the constellation from other crates. These
     /// messages are mainly passed on from the compositor to WebRender.