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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/protocol/input_event_tracker.h"
#include "base/check.h"
#include "base/containers/contains.h"
#include "remoting/proto/event.pb.h"
namespace remoting::protocol {
InputEventTracker::InputEventTracker() = default;
InputEventTracker::InputEventTracker(InputStub* input_stub)
: input_stub_(input_stub) {}
InputEventTracker::~InputEventTracker() = default;
bool InputEventTracker::IsKeyPressed(ui::DomCode usb_keycode) const {
return base::Contains(pressed_keys_, usb_keycode);
}
int InputEventTracker::PressedKeyCount() const {
return pressed_keys_.size();
}
void InputEventTracker::ReleaseAll() {
DCHECK(input_stub_);
// Release all pressed keys.
for (auto keycode : pressed_keys_) {
KeyEvent event;
event.set_pressed(false);
event.set_usb_keycode(static_cast<uint32_t>(keycode));
input_stub_->InjectKeyEvent(event);
}
pressed_keys_.clear();
// Release all mouse buttons.
for (int i = MouseEvent::BUTTON_UNDEFINED + 1; i < MouseEvent::BUTTON_MAX;
++i) {
if (mouse_button_state_ & (1 << (i - 1))) {
MouseEvent mouse;
// TODO(wez): EventInjectors should cope with positionless events by
// using the current cursor position, and we wouldn't set position here.
mouse.set_x(mouse_pos_.x());
mouse.set_y(mouse_pos_.y());
mouse.set_button((MouseEvent::MouseButton)i);
mouse.set_button_down(false);
input_stub_->InjectMouseEvent(mouse);
}
}
mouse_button_state_ = 0;
// Cancel all active touch points.
if (!touch_point_ids_.empty()) {
TouchEvent cancel_all_touch_event;
cancel_all_touch_event.set_event_type(TouchEvent::TOUCH_POINT_CANCEL);
for (uint32_t touch_point_id : touch_point_ids_) {
TouchEventPoint* point = cancel_all_touch_event.add_touch_points();
point->set_id(touch_point_id);
}
input_stub_->InjectTouchEvent(cancel_all_touch_event);
touch_point_ids_.clear();
}
DCHECK(touch_point_ids_.empty());
}
void InputEventTracker::ReleaseAllIfModifiersStuck(bool alt_expected,
bool ctrl_expected,
bool os_expected,
bool shift_expected) {
bool alt_down = base::Contains(pressed_keys_, ui::DomCode::ALT_LEFT) ||
base::Contains(pressed_keys_, ui::DomCode::ALT_RIGHT);
bool ctrl_down = base::Contains(pressed_keys_, ui::DomCode::CONTROL_LEFT) ||
base::Contains(pressed_keys_, ui::DomCode::CONTROL_RIGHT);
bool os_down = base::Contains(pressed_keys_, ui::DomCode::META_LEFT) ||
base::Contains(pressed_keys_, ui::DomCode::META_RIGHT);
bool shift_down = base::Contains(pressed_keys_, ui::DomCode::SHIFT_LEFT) ||
base::Contains(pressed_keys_, ui::DomCode::SHIFT_RIGHT);
if ((alt_down && !alt_expected) || (ctrl_down && !ctrl_expected) ||
(os_down && !os_expected) || (shift_down && !shift_expected)) {
ReleaseAll();
}
}
void InputEventTracker::InjectKeyEvent(const KeyEvent& event) {
DCHECK(input_stub_);
// We don't need to track the keyboard lock states of key down events.
// Pressed keys will be released with |lock_states| set to 0.
// The lock states of auto generated key up events don't matter as long as
// we release all the pressed keys at blurring/disconnection time.
if (event.has_pressed()) {
if (event.has_usb_keycode()) {
if (event.pressed()) {
pressed_keys_.insert(static_cast<ui::DomCode>(event.usb_keycode()));
} else {
pressed_keys_.erase(static_cast<ui::DomCode>(event.usb_keycode()));
}
}
}
input_stub_->InjectKeyEvent(event);
}
void InputEventTracker::InjectTextEvent(const TextEvent& event) {
DCHECK(input_stub_);
input_stub_->InjectTextEvent(event);
}
void InputEventTracker::InjectMouseEvent(const MouseEvent& event) {
DCHECK(input_stub_);
if (event.has_x() && event.has_y()) {
mouse_pos_ = webrtc::DesktopVector(event.x(), event.y());
}
if (event.has_button() && event.has_button_down()) {
// Button values are defined in remoting/proto/event.proto.
if (event.button() >= 1 && event.button() < MouseEvent::BUTTON_MAX) {
uint32_t button_change = 1 << (event.button() - 1);
if (event.button_down()) {
mouse_button_state_ |= button_change;
} else {
mouse_button_state_ &= ~button_change;
}
}
}
input_stub_->InjectMouseEvent(event);
}
void InputEventTracker::InjectTouchEvent(const TouchEvent& event) {
DCHECK(input_stub_);
// We only need the IDs to cancel all touch points in ReleaseAll(). Other
// fields do not have to be tracked here as long as the host keeps track of
// them.
switch (event.event_type()) {
case TouchEvent::TOUCH_POINT_START:
for (const TouchEventPoint& touch_point : event.touch_points()) {
DCHECK(!base::Contains(touch_point_ids_, touch_point.id()));
touch_point_ids_.insert(touch_point.id());
}
break;
case TouchEvent::TOUCH_POINT_END:
case TouchEvent::TOUCH_POINT_CANCEL:
for (const TouchEventPoint& touch_point : event.touch_points()) {
DCHECK(base::Contains(touch_point_ids_, touch_point.id()));
touch_point_ids_.erase(touch_point.id());
}
break;
default:
break;
}
input_stub_->InjectTouchEvent(event);
}
} // namespace remoting::protocol
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