Resolve associated display and pointer display in CursorInputMapper

An InputDevice can be associated with a display, in which case it should
only generate events for that display. A mouse generally generates
events for whichever display is currently showing the mouse cursor.

In the case where a mouse InputDevice is associated with a display, we
need to make sure that it only generates events when the mouse cursor is
on the associated display.

Additionally, any display-dependent configuration, such as orientation,
should depend on whichever display the device is configured for.

Bug: 236075874
Test: atest inputflinger_tests
Change-Id: I1021c121c1eae768585124d312f5187be90da666

1 files changed, 10 insertions, 0 deletions

diff --git a/include/input/PrintTools.h b/include/input/PrintTools.h
index 0a75278494..55f730b287 100644
--- a/include/input/PrintTools.h
+++ b/include/input/PrintTools.h
@@ -17,6 +17,7 @@
 #pragma once
 
 #include <map>
+#include <optional>
 #include <set>
 #include <string>
 
@@ -28,6 +29,15 @@ std::string constToString(const T& v) {
 }
 
 /**
+ * Convert an optional type to string.
+ */
+template <typename T>
+std::string toString(const std::optional<T>& optional,
+                     std::string (*toString)(const T&) = constToString) {
+    return optional ? toString(*optional) : "<not set>";
+}
+
+/**
  * Convert a set of integral types to string.
  */
 template <typename T>