15d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// Copyright 2014 The Chromium Authors. All rights reserved. 21e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 31e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)// found in the LICENSE file. 41e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) 55d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#ifndef UI_EVENTS_OZONE_EVDEV_EVENT_MODIFIERS_EVDEV_H_ 65d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#define UI_EVENTS_OZONE_EVDEV_EVENT_MODIFIERS_EVDEV_H_ 71e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) 85d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#include "base/basictypes.h" 9cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#include "ui/events/ozone/evdev/events_ozone_evdev_export.h" 101e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) 111e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)namespace ui { 121e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) 131e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)enum { 141e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) EVDEV_MODIFIER_NONE, 151e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) EVDEV_MODIFIER_CAPS_LOCK, 161e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) EVDEV_MODIFIER_SHIFT, 171e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) EVDEV_MODIFIER_CONTROL, 181e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) EVDEV_MODIFIER_ALT, 191e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) EVDEV_MODIFIER_LEFT_MOUSE_BUTTON, 201e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) EVDEV_MODIFIER_MIDDLE_MOUSE_BUTTON, 211e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) EVDEV_MODIFIER_RIGHT_MOUSE_BUTTON, 221e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) EVDEV_MODIFIER_COMMAND, 231e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) EVDEV_MODIFIER_ALTGR, 241e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) EVDEV_NUM_MODIFIERS 251e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)}; 261e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) 271e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)// Modifier key state for Evdev. 281e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)// 291e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)// Chrome relies on the underlying OS to interpret modifier keys such as Shift, 301e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)// Ctrl, and Alt. The Linux input subsystem does not assign any special meaning 311e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)// to these keys, so this work must happen at a higher layer (normally X11 or 321e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)// the console driver). When using evdev directly, we must do it ourselves. 331e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)// 341e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)// The modifier state is shared between all input devices connected to the 351e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)// system. This is to support actions such as Shift-Clicking that use multiple 361e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)// devices. 371e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)// 381e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)// Normally a modifier is set if any of the keys or buttons assigned to it are 391e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)// currently pressed. However some keys toggle a persistent "lock" for the 401e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)// modifier instead, such as CapsLock. If a modifier is "locked" then its state 411e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)// is inverted until it is unlocked. 42cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)class EVENTS_OZONE_EVDEV_EXPORT EventModifiersEvdev { 431e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) public: 441e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) EventModifiersEvdev(); 451e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) ~EventModifiersEvdev(); 461e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) 471e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) // Record key press or release for regular modifier key (shift, alt, etc). 481e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) void UpdateModifier(unsigned int modifier, bool down); 491e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) 501e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) // Record key press or release for locking modifier key (caps lock). 511e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) void UpdateModifierLock(unsigned int modifier, bool down); 521e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) 531e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) // Return current flags to use for incoming events. 541e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) int GetModifierFlags(); 551e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) 560529e5d033099cbfc42635f6f6183833b09dff6eBen Murdoch // Return the mask for the specified modifier. 570529e5d033099cbfc42635f6f6183833b09dff6eBen Murdoch static int GetEventFlagFromModifier(unsigned int modifier); 580529e5d033099cbfc42635f6f6183833b09dff6eBen Murdoch 591e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) private: 601e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) // Count of keys pressed for each modifier. 611e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) int modifiers_down_[EVDEV_NUM_MODIFIERS]; 621e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) 631e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) // Mask of modifier flags currently "locked". 641e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) int modifier_flags_locked_; 651e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) 661e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) // Mask of modifier flags currently active (nonzero keys pressed xor locked). 671e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) int modifier_flags_; 681e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) 691e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) // Update modifier_flags_ from modifiers_down_ and modifier_flags_locked_. 701e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) void UpdateFlags(unsigned int modifier); 711e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) 721e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) DISALLOW_COPY_AND_ASSIGN(EventModifiersEvdev); 731e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)}; 741e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) 751e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)} // namspace ui 761e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) 775d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#endif // UI_EVENTS_OZONE_EVDEV_EVENT_MODIFIERS_EVDEV_H_ 78