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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// 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/logging.h"
#include "remoting/proto/event.pb.h"
namespace remoting {
namespace protocol {
InputEventTracker::InputEventTracker(InputStub* input_stub)
: input_stub_(input_stub),
mouse_button_state_(0) {
}
InputEventTracker::~InputEventTracker() {}
bool InputEventTracker::IsKeyPressed(uint32 usb_keycode) const {
return pressed_keys_.find(usb_keycode) != pressed_keys_.end();
}
int InputEventTracker::PressedKeyCount() const {
return pressed_keys_.size();
}
void InputEventTracker::ReleaseAll() {
// Release all pressed keys.
for (uint32 keycode : pressed_keys_) {
KeyEvent event;
event.set_pressed(false);
event.set_usb_keycode(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 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::InjectKeyEvent(const KeyEvent& event) {
// 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(event.usb_keycode());
} else {
pressed_keys_.erase(event.usb_keycode());
}
}
}
input_stub_->InjectKeyEvent(event);
}
void InputEventTracker::InjectTextEvent(const TextEvent& event) {
input_stub_->InjectTextEvent(event);
}
void InputEventTracker::InjectMouseEvent(const MouseEvent& event) {
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 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) {
// 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(touch_point_ids_.find(touch_point.id()) ==
touch_point_ids_.end());
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(touch_point_ids_.find(touch_point.id()) !=
touch_point_ids_.end());
touch_point_ids_.erase(touch_point.id());
}
break;
default:
break;
}
input_stub_->InjectTouchEvent(event);
}
} // namespace protocol
} // namespace remoting
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