Ozone support for device special cases in keyboard event rewriting.

ui/events/ozone/evdev/event_device_info.cc

Index: ui/events/ozone/evdev/event_device_info.cc
diff --git a/ui/events/ozone/evdev/event_device_info.cc b/ui/events/ozone/evdev/event_device_info.cc
index dd297791ec6762d2d3c2513878c6062372c4d141..e3c9f73c34a07991629338169d44d248406d0040 100644
--- a/ui/events/ozone/evdev/event_device_info.cc
+++ b/ui/events/ozone/evdev/event_device_info.cc
@@ -17,6 +17,11 @@ namespace ui {
 
 namespace {
 
+// USB vendor and product strings are pragmatically limited to 126
+// characters each, so device names more than twice that should be
+// unusual.
+const size_t kMaximumDeviceNameLength = 256;
+
 bool GetEventBits(int fd, unsigned int type, void* buf, unsigned int size) {
   if (ioctl(fd, EVIOCGBIT(type, size), buf) < 0) {
     PLOG(ERROR) << "EVIOCGBIT(" << type << ", " << size << ") on fd " << fd;
@@ -43,6 +48,27 @@ bool GetAbsInfo(int fd, int code, struct input_absinfo* absinfo) {
   return true;
 }
 
+bool GetDeviceName(int fd, std::string* name) {
+  char device_name[kMaximumDeviceNameLength];
+  if (ioctl(fd, EVIOCGNAME(kMaximumDeviceNameLength - 1), &device_name) < 0) {
+    PLOG(INFO) << "Can't read device name on fd " << fd;
+    return false;
+  }
+  *name = device_name;
+  return true;
+}
+
+bool GetDeviceIdentifiers(int fd, uint16_t* vendor, uint16_t* product) {
+  struct input_id evdev_id;
+  if (ioctl(fd, EVIOCGID, &evdev_id) < 0) {
+    PLOG(INFO) << "Can't read device name on fd " << fd;
+    return false;
+  }
+  *vendor = evdev_id.vendor;
+  *product = evdev_id.product;
+  return true;
+}
+
 // |request| needs to be the equivalent to:
 // struct input_mt_request_layout {
 //   uint32_t code;
@@ -135,6 +161,12 @@ bool EventDeviceInfo::Initialize(int fd) {
     slots->assign(request_slots, request_slots + max_num_slots);
   }
 
+  if (!GetDeviceName(fd, &name_))
+    return false;
+
+  if (!GetDeviceIdentifiers(fd, &vendor_id_, &product_id_))
+    return false;
+
   return true;
 }