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ports/libmlservo/src/lib.rs

@@ -12,8 +12,10 @@ use servo::BrowserId;
 use servo::Servo;
 use servo::compositing::windowing::AnimationState;
 use servo::compositing::windowing::EmbedderCoordinates;
+use servo::compositing::windowing::MouseWindowEvent;
 use servo::compositing::windowing::WindowEvent;
 use servo::compositing::windowing::WindowMethods;
+use servo::embedder_traits::EmbedderMsg;
 use servo::embedder_traits::EventLoopWaker;
 use servo::embedder_traits::resources::Resource;
 use servo::embedder_traits::resources::ResourceReaderMethods;
@@ -25,8 +27,10 @@ use servo::euclid::TypedSize2D;
 use servo::gl;
 use servo::gl::Gl;
 use servo::gl::GlesFns;
+use servo::script_traits::MouseButton;
 use servo::servo_url::ServoUrl;
 use servo::style_traits::DevicePixel;
+use servo::webrender_api::DevicePoint;
 use smallvec::SmallVec;
 use std::ffi::CStr;
 use std::ffi::CString;
@@ -98,6 +102,61 @@ pub unsafe extern "C" fn heartbeat_servo(servo: ServoInstance) {
     // Servo heartbeat goes here!
     if let Some(servo) = (servo as *mut Servo<WindowInstance>).as_mut() {
         servo.handle_events(vec![]);
+        for ((_browser_id, event)) in servo.get_events() {
+            match event {
+                // Respond to any messages with a response channel
+                // to avoid deadlocking the constellation
+                EmbedderMsg::AllowNavigation(_url, sender) => {
+                    let _ = sender.send(true);
+                },
+                EmbedderMsg::GetSelectedBluetoothDevice(_, sender) => {
+                    let _ = sender.send(None);
+                },
+                EmbedderMsg::AllowUnload(sender) => {
+                    let _ = sender.send(true);
+                },
+                EmbedderMsg::Alert(_, sender) => {
+                    let _ = sender.send(());
+                },
+                EmbedderMsg::AllowOpeningBrowser(sender) => {
+                    let _ = sender.send(false);
+                },
+                // Ignore most messages for now
+                EmbedderMsg::ChangePageTitle(..) |
+                EmbedderMsg::BrowserCreated(..) |
+                EmbedderMsg::HistoryChanged(..) |
+                EmbedderMsg::LoadStart |
+                EmbedderMsg::LoadComplete |
+                EmbedderMsg::CloseBrowser |
+                EmbedderMsg::Status(..) |
+                EmbedderMsg::SelectFiles(..) |
+                EmbedderMsg::MoveTo(..) |
+                EmbedderMsg::ResizeTo(..) |
+                EmbedderMsg::Keyboard(..) |
+                EmbedderMsg::SetCursor(..) |
+                EmbedderMsg::NewFavicon(..) |
+                EmbedderMsg::HeadParsed |
+                EmbedderMsg::SetFullscreenState(..) |
+                EmbedderMsg::ShowIME(..) |
+                EmbedderMsg::HideIME |
+                EmbedderMsg::Shutdown |
+                EmbedderMsg::Panic(..) => {},
+            }
+        }
+    }
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn cursor_servo(servo: ServoInstance, x: f32, y: f32, trigger: bool) {
+    // Servo was triggered
+    if let Some(servo) = (servo as *mut Servo<WindowInstance>).as_mut() {
+        let point = DevicePoint::new(x, y);
+        let window_event = if trigger {
+            WindowEvent::MouseWindowEventClass(MouseWindowEvent::Click(MouseButton::Left, point))
+        } else {
+            WindowEvent::MouseWindowMoveEventClass(point)
+        };
+        servo.handle_events(vec![window_event]);
     }
 }
 

support/magicleap/Servo2D/.vscode/settings.json

@@ -5,6 +5,7 @@
     "C_Cpp.default.includePath": [
         "${workspaceFolder}/code/**",
         "${config.lumin_sdk}/lumin/usr/include/",
+        "${config.lumin_sdk}/lumin/stl/libc++-lumin/include",
         "${config.lumin_sdk}/include/runtime/app",
         "${config.lumin_sdk}/include/runtime/core",
         "${config.lumin_sdk}/include/runtime/external",

support/magicleap/Servo2D/code/inc/Servo2D.h

@@ -5,6 +5,9 @@
 #include <lumin/LandscapeApp.h>
 #include <lumin/Prism.h>
 #include <lumin/event/ServerEvent.h>
+#include <lumin/event/KeyInputEventData.h>
+#include <lumin/event/ControlTouchPadInputEventData.h>
+#include <lumin/node/QuadNode.h>
 #include <lumin/resource/PlanarResource.h>
 #include <SceneDescriptor.h>
 
@@ -88,9 +91,18 @@ protected:
    * Handle events from the server
    */
   virtual bool eventListener(lumin::ServerEvent* event) override;
+  bool touchpadEventListener(lumin::ControlTouchPadInputEventData* event);
+  bool keyEventListener(lumin::KeyInputEventData* event);
+
+  /**
+   * Get the current cursor position, with respect to the viewport.
+   */
+  glm::vec2 viewportCursorPosition();
+  bool pointInsideViewport(glm::vec2 pt);
 
 private:
   lumin::Prism* prism_ = nullptr;  // represents the bounded space where the App renders.
   lumin::PlanarResource* plane_ = nullptr; // the plane we're rendering into
+  lumin::QuadNode* content_node_ = nullptr; // the node containing the plane
   ServoInstance servo_ = nullptr; // the servo instance we're embedding
 };

support/magicleap/Servo2D/code/src/Servo2D.cpp

@@ -11,11 +11,12 @@
 #include <SceneDescriptor.h>
 #include <EGL/egl.h>
 #include <GLES/gl.h>
+#include <glm/gtc/matrix_transform.hpp>
 #include <string.h>
 
 // The viewport dimensions (in px).
-const unsigned int VIEWPORT_W = 500;
-const unsigned int VIEWPORT_H = 500;
+const int VIEWPORT_W = 500;
+const int VIEWPORT_H = 500;
 
 // The hidpi factor.
 const float HIDPI = 1.0;
@@ -38,6 +39,7 @@ void logger(MLLogLevel lvl, char* msg) {
 extern "C" ServoInstance init_servo(EGLContext, EGLSurface, EGLDisplay, MLLogger,
                                     const char* url, int width, int height, float hidpi);
 extern "C" void heartbeat_servo(ServoInstance);
+extern "C" void cursor_servo(ServoInstance, float x, float y, bool triggered);
 extern "C" void discard_servo(ServoInstance);
 
 // Create a Servo2D instance
@@ -86,12 +88,13 @@ int Servo2D::init() {
   }
 
   std::string content_node_id = Servo2D_exportedNodes::content;
-  lumin::QuadNode* content_node = lumin::QuadNode::CastFrom(prism_->findNode(content_node_id, root_node));
-  if (!content_node) {
+  content_node_ = lumin::QuadNode::CastFrom(prism_->findNode(content_node_id, root_node));
+  if (!content_node_) {
     ML_LOG(Error, "Servo2D Failed to get content node");
     abort();
     return 1;
   }
+  content_node_->setTriggerable(true);
 
   lumin::ResourceIDType plane_id = prism_->createPlanarEGLResourceId();
   if (!plane_id) {
@@ -107,7 +110,7 @@ int Servo2D::init() {
     return 1;
   }
 
-  content_node->setRenderResource(plane_id);
+  content_node_->setRenderResource(plane_id);
 
   // Get the EGL context, surface and display.
   EGLContext ctx = plane_->getEGLContext();
@@ -117,7 +120,7 @@ int Servo2D::init() {
   glViewport(0, 0, VIEWPORT_W, VIEWPORT_H);
 
   // Hook into servo
-  servo_ = init_servo(ctx, surf, dpy, logger, "https://servo.org", VIEWPORT_H, VIEWPORT_W, HIDPI);
+  servo_ = init_servo(ctx, surf, dpy, logger, "https://servo.org/", VIEWPORT_H, VIEWPORT_W, HIDPI);
   if (!servo_) {
     ML_LOG(Error, "Servo2D Failed to init servo instance");
     abort();
@@ -192,9 +195,70 @@ bool Servo2D::updateLoop(float fDelta) {
 }
 
 bool Servo2D::eventListener(lumin::ServerEvent* event) {
-
-  // Place your event handling here.
-
-  // Return true if the event is consumed.
-  return false;
+  // Dispatch based on event type
+  switch (event->getServerEventType()) {
+    case lumin::ServerEventType::kControlTouchPadInputEvent:
+      return touchpadEventListener(static_cast<lumin::ControlTouchPadInputEventData*>(event));
+    case lumin::ServerEventType::kKeyInputEvent:
+      return keyEventListener(static_cast<lumin::KeyInputEventData*>(event));
+    default:
+      return false;
+  }
+}
+
+glm::vec2 Servo2D::viewportCursorPosition() {
+  // Get the cursor position relative to the origin of the content node (in m)
+  glm::vec3 pos = lumin::ui::Cursor::GetPosition(prism_) - content_node_->getPrismPosition();
+
+  // Get the size of the content node (in m)
+  glm::vec2 sz = content_node_->getSize();
+
+  // Convert to a position in viewport px
+  float x = (pos.x / sz.x) * (float)VIEWPORT_W;
+  float y = (1 - pos.y / sz.y) * (float)VIEWPORT_H; // Sigh, invert the y coordinate
+
+  return glm::vec2(x, y);
+}
+
+bool Servo2D::pointInsideViewport(glm::vec2 pt) {
+   return (0 <= pt.x && 0 <= pt.y && pt.x <= VIEWPORT_W && pt.y <= VIEWPORT_H);
+}
+
+bool Servo2D::touchpadEventListener(lumin::ControlTouchPadInputEventData* event) {
+  // Only respond when the cursor is enabled
+  if (!lumin::ui::Cursor::IsEnabled(prism_)) {
+    return false;
+  }
+
+  // Only respond when the cursor is inside the viewport
+  glm::vec2 pos = viewportCursorPosition();
+  if (!pointInsideViewport(pos)) {
+    return false;
+  }
+
+  // Inform Servo of the trigger
+  cursor_servo(servo_, pos.x, pos.y, false);
+  return true;
+}
+
+bool Servo2D::keyEventListener(lumin::KeyInputEventData* event) {
+  // Only respond to trigger keys
+  if (event->keyCode() != lumin::input::KeyCodes::AKEYCODE_EX_TRIGGER) {
+    return false;
+  }
+
+  // Only respond when the cursor is enabled
+  if (!lumin::ui::Cursor::IsEnabled(prism_)) {
+    return false;
+  }
+
+  // Only respond when the cursor is inside the viewport
+  glm::vec2 pos = viewportCursorPosition();
+  if (!pointInsideViewport(pos)) {
+    return false;
+  }
+
+  // Inform Servo of the trigger
+  cursor_servo(servo_, pos.x, pos.y, true);
+  return true;
 }