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// Copyright 2018 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/views/input_event_activation_protector.h"
#include "base/command_line.h"
#include "ui/events/event.h"
#include "ui/views/metrics.h"
#include "ui/views/views_switches.h"
namespace views {
InputEventActivationProtector::InputEventActivationProtector() {
WindowsStationarityMonitor::GetInstance()->AddObserver(this);
}
InputEventActivationProtector::~InputEventActivationProtector() {
WindowsStationarityMonitor::GetInstance()->RemoveObserver(this);
}
void InputEventActivationProtector::VisibilityChanged(bool is_visible) {
if (is_visible) {
view_protected_time_stamp_ = base::TimeTicks::Now();
}
}
void InputEventActivationProtector::MaybeUpdateViewProtectedTimeStamp(
bool force) {
// The UI was never shown, ignore.
if (!force && view_protected_time_stamp_ == base::TimeTicks()) {
return;
}
view_protected_time_stamp_ = base::TimeTicks::Now();
}
bool InputEventActivationProtector::IsPossiblyUnintendedInteraction(
const ui::Event& event) {
if (base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kDisableInputEventActivationProtectionForTesting))
[[unlikely]] {
return false;
}
if (view_protected_time_stamp_ == base::TimeTicks()) {
// The UI was never shown, ignore. This can happen in tests.
return false;
}
// Don't let key repeats close the dialog, they might've been held when the
// dialog pops up.
if (event.IsKeyEvent() && event.AsKeyEvent()->is_repeat()) {
return true;
}
if (!event.IsMouseEvent() && !event.IsTouchEvent() &&
!event.IsGestureEvent()) {
return false;
}
const base::TimeDelta kShortInterval =
base::Milliseconds(GetDoubleClickInterval());
const bool short_event_after_last_event =
event.time_stamp() < last_event_timestamp_ + kShortInterval;
last_event_timestamp_ = event.time_stamp();
// Unintended if the user has been clicking with short intervals.
if (short_event_after_last_event) {
repeated_event_count_++;
return true;
}
repeated_event_count_ = 0;
// Unintended if the user clicked right after the view was protected.
return event.time_stamp() < view_protected_time_stamp_ + kShortInterval;
}
void InputEventActivationProtector::OnWindowStationaryStateChanged() {
MaybeUpdateViewProtectedTimeStamp();
}
void InputEventActivationProtector::ResetForTesting() {
view_protected_time_stamp_ = base::TimeTicks();
last_event_timestamp_ = base::TimeTicks();
repeated_event_count_ = 0;
}
} // namespace views
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