Block internal PlatformEvents before they are dispatched in touchview.

ui/events/x/device_data_manager.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_EVENTS_X_DEVICE_DATA_MANAGER_H_
 #define UI_EVENTS_X_DEVICE_DATA_MANAGER_H_
 
 // Generically-named #defines from Xlib is conflicting with symbols in GTest.
 // So many tests .cc file #undef Bool before including device_data_manager.h,
 // which makes Bool unrecognized in XInput2.h.
 #ifndef Bool
 #define Bool int
 #endif
 
 #include <X11/extensions/XInput2.h>
 
 #include <bitset>
 #include <map>
+#include <set>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/event_types.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/events/event.h"
 #include "ui/events/event_constants.h"
 #include "ui/events/events_base_export.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/transform.h"
@@ skipping 193 matching lines @@
                               double value);
 
   void ClearTouchTransformerRecord();
   void UpdateTouchInfoForDisplay(int64 display_id,
                                  int touch_device_id,
                                  const gfx::Transform& touch_transformer);
   void ApplyTouchTransformer(int touch_device_id, float* x, float* y);
   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>;
 
   DeviceDataManager();
   ~DeviceDataManager();
 
   // Initialize the XInput related system information.
   bool InitializeXInputInternal();
 
@@ skipping 16 matching lines @@
   int xi_opcode_;
 
   // A quick lookup table for determining if the XI event is an XIDeviceEvent.
   std::bitset<kMaxXIEventType> xi_device_event_types_;
 
   // A quick lookup table for determining if events from the pointer device
   // should be processed.
   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];
 
   // Index table to find the valuator for DataType on the specific device
   // by valuator_lookup_[device_id][data_type].
   std::vector<int> valuator_lookup_[kMaxDeviceNum];
 
   // Index table to find the DataType for valuator on the specific device
   // by data_type_lookup_[device_id][valuator].
   std::vector<int> data_type_lookup_[kMaxDeviceNum];
@@ skipping 22 matching lines @@
   int64 touch_device_to_display_map_[kMaxDeviceNum];
   // Index table to find the TouchTransformer for a touch device.
   gfx::Transform touch_device_transformer_map_[kMaxDeviceNum];
 
   DISALLOW_COPY_AND_ASSIGN(DeviceDataManager);
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_X_DEVICE_DATA_MANAGER_H_