dom: Calculate the viewport size of iframes when they are first added to the tree.

1 files changed, 11 insertions, 0 deletions

diff --git a/components/layout_2020/query.rs b/components/layout_2020/query.rs
index 23816521c70..1317759b33b 100644
--- a/components/layout_2020/query.rs
+++ b/components/layout_2020/query.rs
@@ -7,6 +7,7 @@
 use crate::context::LayoutContext;
 use app_units::Au;
 use euclid::default::{Point2D, Rect};
+use euclid::Size2D;
 use euclid::Vector2D;
 use ipc_channel::ipc::IpcSender;
 use msg::constellation_msg::PipelineId;
@@ -22,6 +23,7 @@ use std::sync::{Arc, Mutex};
 use style::dom::OpaqueNode;
 use style::properties::PropertyId;
 use style::selector_parser::PseudoElement;
+use style_traits::CSSPixel;
 use webrender_api::units::LayoutPixel;
 use webrender_api::ExternalScrollId;
 
@@ -70,6 +72,9 @@ pub struct LayoutThreadData {
 
     /// A queued response for the inner text of a given element.
     pub element_inner_text_response: String,
+
+    /// A queued response for the viewport dimensions for a given browsing context.
+    pub inner_window_dimensions_response: Option<Size2D<f32, CSSPixel>>,
 }
 
 pub struct LayoutRPCImpl(pub Arc<Mutex<LayoutThreadData>>);
@@ -150,6 +155,12 @@ impl LayoutRPC for LayoutRPCImpl {
         let rw_data = rw_data.lock().unwrap();
         rw_data.element_inner_text_response.clone()
     }
+
+    fn inner_window_dimensions(&self) -> Option<Size2D<f32, CSSPixel>> {
+        let &LayoutRPCImpl(ref rw_data) = self;
+        let rw_data = rw_data.lock().unwrap();
+        rw_data.inner_window_dimensions_response.clone()
+    }
 }
 
 pub fn process_content_box_request(_requested_node: OpaqueNode) -> Option<Rect<Au>> {