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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "ui/events/ozone/evdev/event_modifiers_evdev.h" | |
| 6 | |
| 7 #include <linux/input.h> | |
| 8 | |
| 9 #include "ui/events/event.h" | |
| 10 | |
| 11 namespace ui { | |
| 12 | |
| 13 namespace { | |
| 14 | |
| 15 static const int kEventFlagFromModifiers[] = { | |
| 16 EF_NONE, // EVDEV_MODIFIER_NONE, | |
| 17 EF_CAPS_LOCK_DOWN, // EVDEV_MODIFIER_CAPS_LOCK | |
| 18 EF_SHIFT_DOWN, // EVDEV_MODIFIER_SHIFT | |
| 19 EF_CONTROL_DOWN, // EVDEV_MODIFIER_CONTROL | |
| 20 EF_ALT_DOWN, // EVDEV_MODIFIER_ALT | |
| 21 EF_LEFT_MOUSE_BUTTON, // EVDEV_MODIFIER_LEFT_MOUSE_BUTTON | |
| 22 EF_MIDDLE_MOUSE_BUTTON, // EVDEV_MODIFIER_MIDDLE_MOUSE_BUTTON | |
| 23 EF_RIGHT_MOUSE_BUTTON, // EVDEV_MODIFIER_RIGHT_MOUSE_BUTTON | |
| 24 EF_COMMAND_DOWN, // EVDEV_MODIFIER_COMMAND | |
| 25 EF_ALTGR_DOWN, // EVDEV_MODIFIER_ALTGR | |
| 26 }; | |
| 27 | |
| 28 } // namespace | |
| 29 | |
| 30 EventModifiersEvdev::EventModifiersEvdev() | |
| 31 : modifier_flags_locked_(0), modifier_flags_(0) { | |
| 32 memset(modifiers_down_, 0, sizeof(modifiers_down_)); | |
| 33 } | |
| 34 EventModifiersEvdev::~EventModifiersEvdev() {} | |
| 35 | |
| 36 void EventModifiersEvdev::UpdateModifier(unsigned int modifier, bool down) { | |
| 37 DCHECK_LT(modifier, EVDEV_NUM_MODIFIERS); | |
| 38 | |
| 39 if (down) { | |
| 40 modifiers_down_[modifier]++; | |
| 41 } else { | |
| 42 // Ignore spurious modifier "up" events. This might happen if the | |
| 43 // button is down during startup. | |
| 44 if (modifiers_down_[modifier]) | |
| 45 modifiers_down_[modifier]--; | |
| 46 } | |
| 47 | |
| 48 UpdateFlags(modifier); | |
| 49 } | |
| 50 | |
| 51 void EventModifiersEvdev::UpdateModifierLock(unsigned int modifier, bool down) { | |
| 52 DCHECK_LT(modifier, EVDEV_NUM_MODIFIERS); | |
| 53 | |
| 54 if (down) | |
| 55 modifier_flags_locked_ ^= kEventFlagFromModifiers[modifier]; | |
| 56 | |
| 57 // TODO(spang): Synchronize with the CapsLock LED. | |
| 58 | |
| 59 UpdateFlags(modifier); | |
| 60 } | |
| 61 | |
| 62 void EventModifiersEvdev::UpdateFlags(unsigned int modifier) { | |
| 63 int mask = kEventFlagFromModifiers[modifier]; | |
| 64 bool down = modifiers_down_[modifier]; | |
| 65 bool locked = (modifier_flags_locked_ & mask); | |
| 66 if (down != locked) | |
| 67 modifier_flags_ |= mask; | |
| 68 else | |
| 69 modifier_flags_ &= ~mask; | |
| 70 } | |
| 71 | |
| 72 int EventModifiersEvdev::GetModifierFlags() { return modifier_flags_; } | |
| 73 | |
| 74 // static | |
| 75 int EventModifiersEvdev::GetEventFlagFromModifier(unsigned int modifier) { | |
| 76 return kEventFlagFromModifiers[modifier]; | |
| 77 } | |
| 78 | |
| 79 } // namespace ui | |
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