chromium/ui/events/base_event_utils.cc

// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "ui/events/base_event_utils.h"

#include "base/atomic_sequence_num.h"
#include "base/check_op.h"
#include "base/command_line.h"
#include "base/lazy_instance.h"
#include "base/time/time.h"
#include "build/build_config.h"
#include "build/chromeos_buildflags.h"
#include "ui/events/event_constants.h"
#include "ui/events/event_switches.h"

namespace ui {

namespace {

#if BUILDFLAG(IS_CHROMEOS_ASH)
const int kSystemKeyModifierMask = EF_ALT_DOWN | EF_COMMAND_DOWN;
#elif BUILDFLAG(IS_APPLE)
// Alt modifier is used to input extended characters on Mac.
const int kSystemKeyModifierMask = EF_COMMAND_DOWN;
#else
const int kSystemKeyModifierMask = …;
#endif

}  // namespace

base::AtomicSequenceNumber g_next_event_id;

uint32_t GetNextTouchEventId() { … }

bool IsSystemKeyModifier(int flags) { … }

base::LazyInstance<const base::TickClock*>::Leaky g_tick_clock = …;

base::TimeTicks EventTimeForNow() { … }

void SetEventTickClockForTesting(const base::TickClock* tick_clock) { … }

double EventTimeStampToSeconds(base::TimeTicks time_stamp) { … }

base::TimeTicks EventTimeStampFromSeconds(double time_stamp_seconds) { … }

bool IsValidTimebase(base::TimeTicks now, base::TimeTicks timestamp) { … }

void ValidateEventTimeClock(base::TimeTicks* timestamp) { … }

}  // namespace ui