Prepare for key event delivery to a specific focus item

Begin by routing key events through the component. In the future that
will direct the event to the focus item.

api/sixtyfps-cpp/include/sixtyfps.h

@@ -134,6 +134,8 @@ constexpr inline ItemTreeNode make_dyn_node(std::uintptr_t offset)
 }
 
 using cbindgen_private::InputEventResult;
+using cbindgen_private::KeyEvent;
+using cbindgen_private::KeyEventResult;
 using cbindgen_private::MouseEvent;
 using cbindgen_private::sixtyfps_visit_item_tree;
 namespace private_api {
@@ -174,6 +176,14 @@ inline InputEventResult process_input_event(ComponentRef component, int64_t &mou
                 component, mouse_event, window, *app_component, &mouse_grabber);
     }
 }
+template<typename GetDynamic>
+inline KeyEventResult process_key_event(ComponentRef component, const KeyEvent *key_event,
+                                        Slice<ItemTreeNode> tree, GetDynamic get_dynamic,
+                                        const ComponentWindow *window)
+{
+
+    return cbindgen_private::sixtyfps_process_key_event(component, key_event, window);
+}
 }
 
 // layouts:

api/sixtyfps-rs/lib.rs

@@ -133,9 +133,9 @@ pub mod re_exports {
         PathArcTo, PathData, PathElement, PathEvent, PathLineTo, Point, Rect, Size,
     };
     pub use sixtyfps_corelib::input::{
-        process_ungrabbed_mouse_event, InputEventResult, KeyCode, KeyEvent, KeyEventResult,
-        KeyboardModifiers, MouseEvent, ALT_MODIFIER, CONTROL_MODIFIER, COPY_PASTE_MODIFIER,
-        LOGO_MODIFIER, NO_MODIFIER, SHIFT_MODIFIER,
+        process_key_event, process_ungrabbed_mouse_event, InputEventResult, KeyCode, KeyEvent,
+        KeyEventResult, KeyboardModifiers, MouseEvent, ALT_MODIFIER, CONTROL_MODIFIER,
+        COPY_PASTE_MODIFIER, LOGO_MODIFIER, NO_MODIFIER, SHIFT_MODIFIER,
     };
     pub use sixtyfps_corelib::item_tree::{
         item_offset, visit_item_tree, ItemTreeNode, ItemVisitorRefMut, ItemVisitorVTable,

sixtyfps_compiler/generator/cpp.rs

@@ -858,6 +858,24 @@ fn generate_component(
         }),
     ));
 
+    component_struct.members.push((
+        Access::Private,
+        Declaration::Function(Function {
+            name: "key_event".into(),
+            signature:
+                "(sixtyfps::private_api::ComponentRef component, const sixtyfps::KeyEvent *key_event, const sixtyfps::private_api::ComponentWindow *window) -> sixtyfps::KeyEventResult"
+                    .into(),
+            is_static: true,
+            statements: Some(vec![
+                format!("    auto self = reinterpret_cast<{}*>(component.instance);", component_id),
+                "return sixtyfps::private_api::process_key_event(component, key_event, item_tree(), [self](int dyn_index, [[maybe_unused]] int rep_index) {".into(),
+                format!("    switch(dyn_index) {{ {} }};", repeated_input_branch.join("")),
+                "    return sixtyfps::private_api::ComponentRef{nullptr, nullptr};\n}, window);".into(),
+            ]),
+            ..Default::default()
+        }),
+    ));
+
     component_struct.members.push((
         Access::Public, // FIXME: we call this function from tests
         Declaration::Function(Function {
@@ -885,7 +903,9 @@ fn generate_component(
     declarations.push(Declaration::Var(Var {
         ty: "const sixtyfps::private_api::ComponentVTable".to_owned(),
         name: format!("{}::component_type", component_id),
-        init: Some("{ visit_children, nullptr, compute_layout, input_event }".to_owned()),
+        init: Some(
+            "{ visit_children, nullptr, compute_layout, input_event, key_event }".to_owned(),
+        ),
     }));
 
     declarations.append(&mut file.declarations);

sixtyfps_compiler/generator/rust.rs

@@ -577,6 +577,12 @@ fn generate_component(
                 status
             }
 
+            fn key_event(self: ::core::pin::Pin<&Self>, key_event : &sixtyfps::re_exports::KeyEvent, window: &sixtyfps::re_exports::ComponentWindow)
+                -> sixtyfps::re_exports::KeyEventResult{
+                use sixtyfps::re_exports::*;
+                process_key_event(VRef::new_pin(self), key_event, window)
+            }
+
             #layouts
         }
 

sixtyfps_runtime/corelib/component.rs

@@ -12,7 +12,7 @@ LICENSE END */
 //! This module contains the basic datastructures that are exposed to the C API
 
 use crate::eventloop::ComponentWindow;
-use crate::input::{InputEventResult, MouseEvent};
+use crate::input::{InputEventResult, KeyEvent, KeyEventResult, MouseEvent};
 use crate::item_tree::{ItemVisitorVTable, TraversalOrder, VisitChildrenResult};
 use crate::layout::LayoutInfo;
 use vtable::*;
@@ -44,6 +44,13 @@ pub struct ComponentVTable {
         &ComponentWindow,
         &core::pin::Pin<VRef<ComponentVTable>>,
     ) -> InputEventResult,
+
+    /// key event
+    pub key_event: extern "C" fn(
+        core::pin::Pin<VRef<ComponentVTable>>,
+        &KeyEvent,
+        &ComponentWindow,
+    ) -> KeyEventResult,
 }
 
 /// Alias for `vtable::VRef<ComponentVTable>` which represent a pointer to a `dyn Component` with

sixtyfps_runtime/corelib/graphics.rs

@@ -620,11 +620,7 @@ impl<Backend: GraphicsBackend> crate::eventloop::GenericWindow for GraphicsWindo
         event: &KeyEvent,
         component: core::pin::Pin<crate::component::ComponentRef>,
     ) {
-        crate::input::process_key_event(
-            component,
-            event,
-            &crate::eventloop::ComponentWindow::new(self.clone()),
-        )
+        component.as_ref().key_event(event, &crate::eventloop::ComponentWindow::new(self.clone()));
     }
 
     fn with_platform_window(&self, callback: &dyn Fn(&winit::window::Window)) {

sixtyfps_runtime/corelib/input.rs

@@ -522,16 +522,21 @@ pub fn process_key_event(
     component: ComponentRefPin,
     event: &KeyEvent,
     window: &crate::eventloop::ComponentWindow,
-) {
+) -> KeyEventResult {
+    let mut result = KeyEventResult::EventIgnored;
     crate::item_tree::visit_items(
         component,
         crate::item_tree::TraversalOrder::BackToFront,
-        |_, item, _| match item.as_ref().key_event(event, window) {
+        |_, item, _| {
+            result = item.as_ref().key_event(event, window);
+            match result {
                 KeyEventResult::EventAccepted => ItemVisitorResult::Abort,
                 KeyEventResult::EventIgnored => ItemVisitorResult::Continue(()),
+            }
         },
         (),
     );
+    result
 }
 
 pub(crate) mod ffi {
@@ -560,4 +565,13 @@ pub(crate) mod ffi {
     ) -> (InputEventResult, crate::item_tree::VisitChildrenResult) {
         process_grabbed_mouse_event(component, item, offset, event, old_grab)
     }*/
+
+    #[no_mangle]
+    pub extern "C" fn sixtyfps_process_key_event(
+        component: core::pin::Pin<crate::component::ComponentRef>,
+        event: &KeyEvent,
+        window: &crate::eventloop::ComponentWindow,
+    ) -> KeyEventResult {
+        process_key_event(component, event, window)
+    }
 }

sixtyfps_runtime/interpreter/dynamic_component.rs

@@ -574,7 +574,13 @@ fn generate_component<'id>(
         todo!()
     }
 
-    let t = ComponentVTable { visit_children_item, layout_info, compute_layout, input_event };
+    let t = ComponentVTable {
+        visit_children_item,
+        layout_info,
+        compute_layout,
+        input_event,
+        key_event,
+    };
     let t = ComponentDescription {
         ct: t,
         dynamic_type: builder.build(),
@@ -1129,6 +1135,14 @@ extern "C" fn input_event(
     status
 }
 
+extern "C" fn key_event(
+    component: ComponentRefPin,
+    key_event: &sixtyfps_corelib::input::KeyEvent,
+    window: &sixtyfps_corelib::eventloop::ComponentWindow,
+) -> sixtyfps_corelib::input::KeyEventResult {
+    sixtyfps_corelib::input::process_key_event(component, key_event, window)
+}
+
 extern "C" fn compute_layout(component: ComponentRefPin) {
     generativity::make_guard!(guard);
     // This is fine since we can only be called with a component that with our vtable which is a ComponentDescription