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// Copyright (c) 2011 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/host/event_executor.h"
#include <windows.h>
#include "base/bind.h"
#include "base/compiler_specific.h"
#include "base/message_loop.h"
#include "remoting/host/capturer.h"
#include "remoting/proto/event.pb.h"
#include "ui/base/keycodes/keyboard_codes.h"
namespace remoting {
using protocol::MouseEvent;
using protocol::KeyEvent;
namespace {
// A class to generate events on Windows.
class EventExecutorWin : public EventExecutor {
public:
EventExecutorWin(MessageLoop* message_loop, Capturer* capturer);
virtual ~EventExecutorWin() {}
virtual void InjectKeyEvent(const KeyEvent& event) OVERRIDE;
virtual void InjectMouseEvent(const MouseEvent& event) OVERRIDE;
private:
void HandleKey(const KeyEvent& event);
void HandleMouse(const MouseEvent& event);
MessageLoop* message_loop_;
Capturer* capturer_;
DISALLOW_COPY_AND_ASSIGN(EventExecutorWin);
};
EventExecutorWin::EventExecutorWin(MessageLoop* message_loop,
Capturer* capturer)
: message_loop_(message_loop),
capturer_(capturer) {
}
void EventExecutorWin::InjectKeyEvent(const KeyEvent& event) {
if (MessageLoop::current() != message_loop_) {
message_loop_->PostTask(
FROM_HERE,
base::Bind(&EventExecutorWin::InjectKeyEvent, base::Unretained(this),
event));
return;
}
HandleKey(event);
}
void EventExecutorWin::InjectMouseEvent(const MouseEvent& event) {
if (MessageLoop::current() != message_loop_) {
message_loop_->PostTask(
FROM_HERE,
base::Bind(&EventExecutorWin::InjectMouseEvent, base::Unretained(this),
event));
return;
}
HandleMouse(event);
}
void EventExecutorWin::HandleKey(const KeyEvent& event) {
int key = event.keycode();
bool down = event.pressed();
// Calculate scan code from virtual key.
HKL hkl = GetKeyboardLayout(0);
int scan_code = MapVirtualKeyEx(key, MAPVK_VK_TO_VSC_EX, hkl);
INPUT input;
memset(&input, 0, sizeof(input));
input.type = INPUT_KEYBOARD;
input.ki.time = 0;
input.ki.wVk = key;
input.ki.wScan = scan_code;
// Flag to mark extended 'e0' key scancodes. Without this, the left and
// right windows keys will not be handled properly (on US keyboard).
if ((scan_code & 0xFF00) == 0xE000) {
input.ki.dwFlags |= KEYEVENTF_EXTENDEDKEY;
}
// Flag to mark keyup events. Default is keydown.
if (!down) {
input.ki.dwFlags |= KEYEVENTF_KEYUP;
}
SendInput(1, &input, sizeof(INPUT));
}
void EventExecutorWin::HandleMouse(const MouseEvent& event) {
// TODO(garykac) Collapse mouse (x,y) and button events into a single
// input event when possible.
if (event.has_x() && event.has_y()) {
int x = event.x();
int y = event.y();
INPUT input;
input.type = INPUT_MOUSE;
input.mi.time = 0;
SkISize screen_size = capturer_->size_most_recent();
if ((screen_size.width() > 1) && (screen_size.height() > 1)) {
input.mi.dx = static_cast<int>((x * 65535) / (screen_size.width() - 1));
input.mi.dy = static_cast<int>((y * 65535) / (screen_size.height() - 1));
input.mi.dwFlags = MOUSEEVENTF_MOVE | MOUSEEVENTF_ABSOLUTE;
SendInput(1, &input, sizeof(INPUT));
}
}
if (event.has_wheel_offset_x() && event.has_wheel_offset_y()) {
INPUT wheel;
wheel.type = INPUT_MOUSE;
wheel.mi.time = 0;
int dx = event.wheel_offset_x();
int dy = event.wheel_offset_y();
if (dx != 0) {
wheel.mi.mouseData = dx * WHEEL_DELTA;
wheel.mi.dwFlags = MOUSEEVENTF_HWHEEL;
SendInput(1, &wheel, sizeof(INPUT));
}
if (dy != 0) {
wheel.mi.mouseData = dy * WHEEL_DELTA;
wheel.mi.dwFlags = MOUSEEVENTF_WHEEL;
SendInput(1, &wheel, sizeof(INPUT));
}
}
if (event.has_button() && event.has_button_down()) {
INPUT button_event;
button_event.type = INPUT_MOUSE;
button_event.mi.time = 0;
button_event.mi.dx = 0;
button_event.mi.dy = 0;
MouseEvent::MouseButton button = event.button();
bool down = event.button_down();
if (button == MouseEvent::BUTTON_LEFT) {
button_event.mi.dwFlags =
down ? MOUSEEVENTF_LEFTDOWN : MOUSEEVENTF_LEFTUP;
} else if (button == MouseEvent::BUTTON_MIDDLE) {
button_event.mi.dwFlags =
down ? MOUSEEVENTF_MIDDLEDOWN : MOUSEEVENTF_MIDDLEUP;
} else if (button == MouseEvent::BUTTON_RIGHT) {
button_event.mi.dwFlags =
down ? MOUSEEVENTF_RIGHTDOWN : MOUSEEVENTF_RIGHTUP;
} else {
button_event.mi.dwFlags =
down ? MOUSEEVENTF_LEFTDOWN : MOUSEEVENTF_LEFTUP;
}
SendInput(1, &button_event, sizeof(INPUT));
}
}
} // namespace
EventExecutor* EventExecutor::Create(MessageLoop* message_loop,
Capturer* capturer) {
return new EventExecutorWin(message_loop, capturer);
}
} // namespace remoting
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