[1/n CD Cursor] Pass topology to InputDispatcher

Pass the display topology to InputDispatcher.

Bug: 367661487
Test: atest inputflinger_tests
Flag: com.android.input.flags.connected_displays_cursor
Change-Id: Ie4dfa53d232a5d2b47b431eed4c307e61235c0cf

Author: Arpit Singh

services/inputflinger/dispatcher/InputDispatcher.cpp

@@ -7267,6 +7267,12 @@ void InputDispatcher::setInputMethodConnectionIsActive(bool isActive) {
     }
 }
 
+void InputDispatcher::setDisplayTopology(
+        const android::DisplayTopologyGraph& displayTopologyGraph) {
+    std::scoped_lock _l(mLock);
+    mWindowInfos.setDisplayTopology(displayTopologyGraph);
+}
+
 InputDispatcher::ConnectionManager::ConnectionManager(const sp<android::Looper>& looper)
       : mLooper(looper) {}
 
@@ -7402,6 +7408,11 @@ void InputDispatcher::DispatcherWindowInfo::setMaximumObscuringOpacityForTouch(f
     mMaximumObscuringOpacityForTouch = opacity;
 }
 
+void InputDispatcher::DispatcherWindowInfo::setDisplayTopology(
+        const DisplayTopologyGraph& displayTopologyGraph) {
+    mTopology = displayTopologyGraph;
+}
+
 ftl::Flags<InputTarget::Flags> InputDispatcher::DispatcherTouchState::getTargetFlags(
         const sp<WindowInfoHandle>& targetWindow, vec2 targetPosition, bool isSplit,
         const DispatcherWindowInfo& windowInfos) {

services/inputflinger/dispatcher/InputDispatcher.h

@@ -164,6 +164,8 @@ class InputDispatcher : public android::InputDispatcherInterface {
 
     void setInputMethodConnectionIsActive(bool isActive) override;
 
+    void setDisplayTopology(const DisplayTopologyGraph& displayTopologyGraph) override;
+
 private:
     enum class DropReason {
         NOT_DROPPED,
@@ -291,6 +293,8 @@ class InputDispatcher : public android::InputDispatcherInterface {
 
         void setMaximumObscuringOpacityForTouch(float opacity);
 
+        void setDisplayTopology(const DisplayTopologyGraph& displayTopologyGraph);
+
         // Get a reference to window handles by display, return an empty vector if not found.
         const std::vector<sp<android::gui::WindowInfoHandle>>& getWindowHandlesForDisplay(
                 ui::LogicalDisplayId displayId) const;
@@ -341,6 +345,11 @@ class InputDispatcher : public android::InputDispatcherInterface {
         std::unordered_map<ui::LogicalDisplayId /*displayId*/, android::gui::DisplayInfo>
                 mDisplayInfos;
         float mMaximumObscuringOpacityForTouch{1.0f};
+
+        // Topology is initialized with default-constructed value, which is an empty topology until
+        // we receive setDisplayTopology call. Meanwhile we will treat every display as an
+        // independent display.
+        DisplayTopologyGraph mTopology;
     };
 
     DispatcherWindowInfo mWindowInfos GUARDED_BY(mLock);

services/inputflinger/dispatcher/include/InputDispatcherInterface.h

@@ -24,6 +24,7 @@
 #include <android/os/InputEventInjectionSync.h>
 #include <gui/InputApplication.h>
 #include <gui/WindowInfo.h>
+#include <input/DisplayTopologyGraph.h>
 #include <input/InputDevice.h>
 #include <input/InputTransport.h>
 #include <unordered_map>
@@ -243,6 +244,11 @@ class InputDispatcherInterface : public InputListenerInterface {
      * Notify the dispatcher that the state of the input method connection changed.
      */
     virtual void setInputMethodConnectionIsActive(bool isActive) = 0;
+
+    /*
+     * Notify the dispatcher of the latest DisplayTopology.
+     */
+    virtual void setDisplayTopology(const DisplayTopologyGraph& displayTopologyGraph) = 0;
 };
 
 } // namespace android