Block internal PlatformEvents before they are dispatched in touchview.

ui/events/x/device_data_manager.h

Index: ui/events/x/device_data_manager.h
diff --git a/ui/events/x/device_data_manager.h b/ui/events/x/device_data_manager.h
index 1135ec222b89ee5d491f5fae7e130aced0c64bc2..d1b956966783115ae8c9f4de4caf633cf2e93098 100644
--- a/ui/events/x/device_data_manager.h
+++ b/ui/events/x/device_data_manager.h
@@ -16,6 +16,7 @@
 
 #include <bitset>
 #include <map>
+#include <set>
 #include <vector>
 
 #include "base/basictypes.h"
@@ -229,6 +230,20 @@ class EVENTS_BASE_EXPORT DeviceDataManager {
   int64 GetDisplayForTouchDevice(int touch_device_id) const;
   bool TouchEventNeedsCalibrate(int touch_device_id) const;
 
+  // Disables the physical keyboard except for the |excepted_keys| provided.
+  void DisableKeyboard(scoped_ptr<std::set<KeyboardCode> > excepted_keys);
+  // Re-enables the keyboard after a previous call to DisableKeyboard.
+  void EnableKeyboard();
+
+  // Disables and enables events from devices by device id.
+  void DisableDevice(unsigned int deviceid);
+  void EnableDevice(unsigned int deviceid);
+
+  // Returns true if the passed in event should be blocked. For mouse events
+  // this also has the side effect of returning the mouse cursor to the last
+  // known location from an unblocked event.

[sadrul, 2014/06/12 21:02:27]

Can you clarify the comment about mouse events? (calling this function does not
restore the mouse-cursor to the last know position, right?)

[flackr, 2014/06/18 05:28:32]

Done.

+  bool EventBlocked(const base::NativeEvent& native_event);

[sadrul, 2014/06/12 21:02:27]

IsEventBlocked()?

[flackr, 2014/06/18 05:28:32]

Done.

+
  private:
   // Requirement for Singleton.
   friend struct DefaultSingletonTraits<DeviceDataManager>;
@@ -265,6 +280,18 @@ class EVENTS_BASE_EXPORT DeviceDataManager {
   std::bitset<kMaxDeviceNum> cmt_devices_;
   std::bitset<kMaxDeviceNum> touchpads_;
 
+  // A quick lookup table for determining if events from the XI device
+  // be blocked.

[sadrul, 2014/06/12 21:02:27]

+should

[flackr, 2014/06/18 05:28:32]

Done.

+  std::bitset<kMaxDeviceNum> blocked_devices_;
+
+  // When true, keyboard events will be blocked.
+  // TODO(flackr): Only block the internal keyboard when XI2 is used for key
+  // events. http://crbug.com/362881.
+  bool blocked_keyboard_;
+
+  // The set of keys allowed while the keyboard is blocked.
+  scoped_ptr<std::set<KeyboardCode> > blocked_keyboard_allowed_keys_;
+
   // Number of valuators on the specific device.
   int valuator_count_[kMaxDeviceNum];