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#include "WSMessageLoop.h"
#include "WSMessage.h"
#include "WSMessageReceiver.h"
#include "WSWindowManager.h"
#include "WSScreen.h"
#include "PS2MouseDevice.h"
#include <Kernel/Keyboard.h>
#include <AK/Bitmap.h>
#include "Process.h"
//#define WSEVENTLOOP_DEBUG
static WSMessageLoop* s_the;
void WSMessageLoop::initialize()
{
s_the = nullptr;
}
WSMessageLoop::WSMessageLoop()
{
if (!s_the)
s_the = this;
}
WSMessageLoop::~WSMessageLoop()
{
}
WSMessageLoop& WSMessageLoop::the()
{
ASSERT(s_the);
return *s_the;
}
int WSMessageLoop::exec()
{
m_server_process = current;
m_keyboard_fd = m_server_process->sys$open("/dev/keyboard", O_RDONLY);
m_mouse_fd = m_server_process->sys$open("/dev/psaux", O_RDONLY);
ASSERT(m_keyboard_fd >= 0);
ASSERT(m_mouse_fd >= 0);
m_running = true;
for (;;) {
wait_for_message();
Vector<QueuedMessage> messages;
{
ASSERT_INTERRUPTS_ENABLED();
LOCKER(m_lock);
messages = move(m_queued_messages);
}
for (auto& queued_message : messages) {
auto* receiver = queued_message.receiver;
auto& message = *queued_message.message;
#ifdef WSEVENTLOOP_DEBUG
dbgprintf("WSMessageLoop: receiver{%p} message %u (%s)\n", receiver, (unsigned)event.type(), event.name());
#endif
if (!receiver) {
dbgprintf("WSMessage type %u with no receiver :(\n", message.type());
ASSERT_NOT_REACHED();
return 1;
} else {
receiver->on_message(message);
}
}
}
}
void WSMessageLoop::post_message(WSMessageReceiver* receiver, OwnPtr<WSMessage>&& message)
{
ASSERT_INTERRUPTS_ENABLED();
LOCKER(m_lock);
#ifdef WSEVENTLOOP_DEBUG
dbgprintf("WSMessageLoop::post_message: {%u} << receiver=%p, message=%p\n", m_queued_messages.size(), receiver, message.ptr());
#endif
if (message->type() == WSMessage::WM_Invalidate) {
auto& invalidation_message = static_cast<WSWindowInvalidationEvent&>(*message);
for (auto& queued_message : m_queued_messages) {
if (receiver == queued_message.receiver && queued_message.message->type() == WSMessage::WM_Invalidate) {
auto& queued_invalidation_message = static_cast<WSWindowInvalidationEvent&>(*queued_message.message);
if (queued_invalidation_message.rect().is_empty() || queued_invalidation_message.rect().contains(invalidation_message.rect())) {
#ifdef WSEVENTLOOP_DEBUG
dbgprintf("Swallow WM_Invalidate\n");
#endif
return;
}
}
}
}
if (message->type() == WSMessage::Paint) {
auto& invalidation_message = static_cast<WSPaintEvent&>(*message);
for (auto& queued_message : m_queued_messages) {
if (receiver == queued_message.receiver && queued_message.message->type() == WSMessage::Paint) {
auto& queued_invalidation_message = static_cast<WSPaintEvent&>(*queued_message.message);
if (queued_invalidation_message.rect().is_empty() || queued_invalidation_message.rect().contains(invalidation_message.rect())) {
#ifdef WSEVENTLOOP_DEBUG
dbgprintf("Swallow WM_Paint\n");
#endif
return;
}
}
}
}
m_queued_messages.append({ receiver, move(message) });
if (current != m_server_process)
m_server_process->request_wakeup();
}
void WSMessageLoop::wait_for_message()
{
fd_set rfds;
memset(&rfds, 0, sizeof(rfds));
auto bitmap = Bitmap::wrap((byte*)&rfds, FD_SETSIZE);
bitmap.set(m_keyboard_fd, true);
bitmap.set(m_mouse_fd, true);
Syscall::SC_select_params params;
params.nfds = max(m_keyboard_fd, m_mouse_fd) + 1;
params.readfds = &rfds;
params.writefds = nullptr;
params.exceptfds = nullptr;
struct timeval timeout = { 0, 0 };
if (m_queued_messages.is_empty())
params.timeout = nullptr;
else
params.timeout = &timeout;
int rc = m_server_process->sys$select(¶ms);
memory_barrier();
if (rc < 0) {
ASSERT_NOT_REACHED();
}
if (bitmap.get(m_keyboard_fd))
drain_keyboard();
if (bitmap.get(m_mouse_fd))
drain_mouse();
}
void WSMessageLoop::drain_mouse()
{
auto& screen = WSScreen::the();
auto& mouse = PS2MouseDevice::the();
bool prev_left_button = screen.left_mouse_button_pressed();
bool prev_right_button = screen.right_mouse_button_pressed();
int dx = 0;
int dy = 0;
while (mouse.can_read(*m_server_process)) {
byte data[3];
ssize_t nread = mouse.read(*m_server_process, (byte*)data, sizeof(data));
ASSERT(nread == sizeof(data));
bool left_button = data[0] & 1;
bool right_button = data[0] & 2;
dx += data[1] ? (int)data[1] - (int)((data[0] << 4) & 0x100) : 0;
dy += data[2] ? (int)((data[0] << 3) & 0x100) - (int)data[2] : 0;
if (left_button != prev_left_button || right_button != prev_right_button || !mouse.can_read(*m_server_process)) {
prev_left_button = left_button;
prev_right_button = right_button;
screen.on_receive_mouse_data(dx, dy, left_button, right_button);
dx = 0;
dy = 0;
}
}
}
void WSMessageLoop::drain_keyboard()
{
auto& screen = WSScreen::the();
auto& keyboard = Keyboard::the();
while (keyboard.can_read(*m_server_process)) {
Keyboard::Event event;
ssize_t nread = keyboard.read(*m_server_process, (byte*)&event, sizeof(Keyboard::Event));
ASSERT(nread == sizeof(Keyboard::Event));
screen.on_receive_keyboard_data(event);
}
}
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