ozone: evdev: Add libgestures bindings for touchpad & mouse support

ui/events/events.gyp

Index: ui/events/events.gyp
diff --git a/ui/events/events.gyp b/ui/events/events.gyp
index 7ef892d3224549cab41855507d6b1ce7bdb32a3d..41afd5982aa4a40de83adb922d4897f55e33df4b 100644
--- a/ui/events/events.gyp
+++ b/ui/events/events.gyp
@@ -114,6 +114,16 @@
         'gestures/gesture_types.h',
         'gestures/velocity_calculator.cc',
         'gestures/velocity_calculator.h',
+        'ozone/evdev/gestures/event_reader_libevdev_cros.cc',
+        'ozone/evdev/gestures/event_reader_libevdev_cros.h',
+        'ozone/evdev/gestures/gesture_interpreter_libevdev_cros.cc',
+        'ozone/evdev/gestures/gesture_interpreter_libevdev_cros.h',
+        'ozone/evdev/gestures/gesture_logging.cc',
+        'ozone/evdev/gestures/gesture_logging.h',
+        'ozone/evdev/gestures/gesture_property_provider.cc',
+        'ozone/evdev/gestures/gesture_property_provider.h',
+        'ozone/evdev/gestures/gesture_timer_provider.cc',
+        'ozone/evdev/gestures/gesture_timer_provider.h',
         'ozone/evdev/device_manager_evdev.cc',
         'ozone/evdev/device_manager_evdev.h',
         'ozone/evdev/device_manager_udev.cc',
@@ -157,6 +167,19 @@
             '<(DEPTH)/build/linux/system.gyp:udev',
           ],
         }],
+        ['use_ozone_evdev==1 and use_evdev_gestures==1', {

[sadrul, 2014/03/11 16:48:12]

Do we really need to support this level of granularity for every feature? Can we
just require that if you are using evdev, you should always use libgestures as
well?

[spang, 2014/03/11 16:58:50]

It's this way because the library does not exist on desktop, and so can't be in
in build-deps, and because it is not checked into third_party.

There's precedent for this. In particular CRAS works this way, because libcras
is a similar library that only exists in ChromeOS.

[sadrul, 2014/03/11 18:13:41]

Fair enough. I suspect we would want some sort of test-coverage for this code at
some point though, and so we would need to pull this into third_party at that
time. We should make sure that this doesn't get lost (file a bug?)

+          'dependencies': [
+            '<(DEPTH)/build/linux/system.gyp:libgestures',
+            '<(DEPTH)/build/linux/system.gyp:libevdev-cros',
+          ],
+          'defines': [
+            'USE_EVDEV_GESTURES',
+          ],
+        }, {
+          'sources/': [
+            ['exclude', '^ozone/evdev/gestures/'],
+          ],
+        }],
         ['use_udev==0', {
           'sources!': [
             'ozone/evdev/device_manager_udev.cc',