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barrier/synergy/CXWindowsPrimaryScreen.cpp

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#include "CXWindowsPrimaryScreen.h"
#include "CServer.h"
#include "CThread.h"
#include "TMethodJob.h"
#include "CLog.h"
#include <assert.h>
#include <X11/X.h>
//
// CXWindowsPrimaryScreen
//
CXWindowsPrimaryScreen::CXWindowsPrimaryScreen() :
m_server(NULL),
m_display(NULL),
m_w(0), m_h(0),
m_window(None),
m_active(false)
{
// do nothing
}
CXWindowsPrimaryScreen::~CXWindowsPrimaryScreen()
{
assert(m_display == NULL);
}
void CXWindowsPrimaryScreen::open(CServer* server)
{
assert(m_server == NULL);
assert(server != NULL);
// set the server
m_server = server;
// open the display
log((CLOG_DEBUG "XOpenDisplay(%s)", "NULL"));
m_display = ::XOpenDisplay(NULL); // FIXME -- allow non-default
if (m_display == NULL)
throw int(5); // FIXME -- make exception for this
// get default screen
m_screen = DefaultScreen(m_display);
Screen* screen = ScreenOfDisplay(m_display, m_screen);
// get screen size
m_w = WidthOfScreen(screen);
m_h = HeightOfScreen(screen);
log((CLOG_INFO "primary display size: %dx%d", m_w, m_h));
// get the root window
m_root = RootWindow(m_display, m_screen);
// create the grab window. this window is used to capture user
// input when the user is focussed on another client. don't let
// the window manager mess with it.
XSetWindowAttributes attr;
attr.event_mask = PointerMotionMask |// PointerMotionHintMask |
ButtonPressMask | ButtonReleaseMask |
KeyPressMask | KeyReleaseMask |
KeymapStateMask;
attr.do_not_propagate_mask = 0;
attr.override_redirect = True;
attr.cursor = createBlankCursor();
m_window = ::XCreateWindow(m_display, m_root, 0, 0, m_w, m_h, 0, 0,
InputOnly, CopyFromParent,
CWDontPropagate | CWEventMask |
CWOverrideRedirect | CWCursor,
&attr);
// start watching for events on other windows
selectEvents(m_root);
// start processing events
m_eventThread = new CThread(new TMethodJob<CXWindowsPrimaryScreen>(
this, &CXWindowsPrimaryScreen::eventThread));
}
void CXWindowsPrimaryScreen::close()
{
assert(m_server != NULL);
assert(m_window != None);
assert(m_eventThread != NULL);
// stop event thread
log((CLOG_DEBUG "stopping event thread"));
m_eventThread->cancel();
m_eventThread->wait();
delete m_eventThread;
m_eventThread = NULL;
log((CLOG_DEBUG "stopped event thread"));
// destroy window
::XDestroyWindow(m_display, m_window);
m_window = None;
// close the display
::XCloseDisplay(m_display);
m_display = NULL;
log((CLOG_DEBUG "closed display"));
}
void CXWindowsPrimaryScreen::enter(SInt32 x, SInt32 y)
{
log((CLOG_INFO "entering primary at %d,%d", x, y));
assert(m_display != NULL);
assert(m_window != None);
assert(m_active == true);
// warp to requested location
::XWarpPointer(m_display, None, m_window, 0, 0, 0, 0, x, y);
// unmap the grab window. this also ungrabs the mouse and keyboard.
::XUnmapWindow(m_display, m_window);
// remove all input events for grab window
XEvent event;
while (::XCheckWindowEvent(m_display, m_window,
PointerMotionMask |
ButtonPressMask | ButtonReleaseMask |
KeyPressMask | KeyReleaseMask |
KeymapStateMask,
&event)) {
// do nothing
}
// not active anymore
m_active = false;
}
void CXWindowsPrimaryScreen::leave()
{
log((CLOG_INFO "leaving primary"));
assert(m_display != NULL);
assert(m_window != None);
assert(m_active == false);
// raise and show the input window
::XMapRaised(m_display, m_window);
// grab the mouse and keyboard. keep trying until we get them.
// if we can't grab one after grabbing the other then ungrab
// and wait before retrying.
int result;
do {
// mouse first
do {
result = ::XGrabPointer(m_display, m_window, True, 0,
GrabModeAsync, GrabModeAsync,
m_window, None, CurrentTime);
assert(result != GrabNotViewable);
if (result != GrabSuccess) {
log((CLOG_DEBUG "waiting to grab pointer"));
CThread::sleep(0.25);
}
} while (result != GrabSuccess);
log((CLOG_DEBUG "grabbed pointer"));
// now the keyboard
result = ::XGrabKeyboard(m_display, m_window, True,
GrabModeAsync, GrabModeAsync, CurrentTime);
assert(result != GrabNotViewable);
if (result != GrabSuccess) {
::XUngrabPointer(m_display, CurrentTime);
log((CLOG_DEBUG "ungrabbed pointer, waiting to grab keyboard"));
CThread::sleep(0.25);
}
} while (result != GrabSuccess);
log((CLOG_DEBUG "grabbed keyboard"));
// move the mouse to the center of grab window
warpCursor(m_w >> 1, m_h >> 1);
// local client now active
m_active = true;
}
void CXWindowsPrimaryScreen::warpCursor(SInt32 x, SInt32 y)
{
// warp the mouse
::XWarpPointer(m_display, None, m_root, 0, 0, 0, 0, x, y);
::XSync(m_display, False);
log((CLOG_DEBUG "warped to %d,%d", x, y));
// discard mouse events since we just added one we don't want
XEvent xevent;
while (::XCheckWindowEvent(m_display, m_window,
PointerMotionMask, &xevent)) {
// do nothing
}
}
void CXWindowsPrimaryScreen::getSize(
SInt32* width, SInt32* height) const
{
assert(m_display != NULL);
assert(width != NULL && height != NULL);
*width = m_w;
*height = m_h;
}
SInt32 CXWindowsPrimaryScreen::getJumpZoneSize() const
{
assert(m_display != NULL);
return 1;
}
void CXWindowsPrimaryScreen::selectEvents(Window w) const
{
// we want to track the mouse everywhere on the display. to achieve
// that we select PointerMotionMask on every window. we also select
// SubstructureNotifyMask in order to get CreateNotify events so we
// select events on new windows too.
// we don't want to adjust our grab window
if (w == m_window)
return;
// select events of interest
::XSelectInput(m_display, w, PointerMotionMask | SubstructureNotifyMask);
// recurse on child windows
Window rw, pw, *cw;
unsigned int nc;
if (::XQueryTree(m_display, w, &rw, &pw, &cw, &nc)) {
for (unsigned int i = 0; i < nc; ++i)
selectEvents(cw[i]);
::XFree(cw);
}
}
Cursor CXWindowsPrimaryScreen::createBlankCursor()
{
// this seems just a bit more complicated than really necessary
// get the closet cursor size to 1x1
unsigned int w, h;
::XQueryBestCursor(m_display, m_root, 1, 1, &w, &h);
// make bitmap data for cursor of closet size. since the cursor
// is blank we can use the same bitmap for shape and mask: all
// zeros.
const int size = ((w + 7) >> 3) * h;
char* data = new char[size];
memset(data, 0, size);
// make bitmap
Pixmap bitmap = ::XCreateBitmapFromData(m_display, m_root, data, w, h);
// need an arbitrary color for the cursor
XColor color;
color.pixel = 0;
color.red = color.green = color.blue = 0;
color.flags = DoRed | DoGreen | DoBlue;
// make cursor from bitmap
Cursor cursor = ::XCreatePixmapCursor(m_display, bitmap, bitmap,
&color, &color, 0, 0);
// don't need bitmap or the data anymore
delete[] data;
::XFreePixmap(m_display, bitmap);
return cursor;
}
void CXWindowsPrimaryScreen::eventThread(void*)
{
for (;;) {
// wait for and then get the next event
while (XPending(m_display) == 0) {
CThread::sleep(0.05);
}
XEvent xevent;
XNextEvent(m_display, &xevent);
// handle event
switch (xevent.type) {
case CreateNotify:
// select events on new window
selectEvents(xevent.xcreatewindow.window);
break;
case KeyPress: {
log((CLOG_DEBUG "event: KeyPress code=%d, state=0x%04x", xevent.xkey.keycode, xevent.xkey.state));
const KeyModifierMask mask = mapModifier(xevent.xkey.state);
const KeyID key = mapKey(xevent.xkey.keycode, mask);
if (key != kKeyNone) {
m_server->onKeyDown(key, mask);
}
break;
}
// FIXME -- simulate key repeat. X sends press/release for
// repeat. must detect auto repeat and use kKeyRepeat.
case KeyRelease: {
log((CLOG_DEBUG "event: KeyRelease code=%d, state=0x%04x", xevent.xkey.keycode, xevent.xkey.state));
const KeyModifierMask mask = mapModifier(xevent.xkey.state);
const KeyID key = mapKey(xevent.xkey.keycode, mask);
if (key != kKeyNone) {
m_server->onKeyUp(key, mask);
}
break;
}
case ButtonPress: {
log((CLOG_DEBUG "event: ButtonPress button=%d", xevent.xbutton.button));
const ButtonID button = mapButton(xevent.xbutton.button);
if (button != kButtonNone) {
m_server->onMouseDown(button);
}
break;
}
case ButtonRelease: {
log((CLOG_DEBUG "event: ButtonRelease button=%d", xevent.xbutton.button));
const ButtonID button = mapButton(xevent.xbutton.button);
if (button != kButtonNone) {
m_server->onMouseUp(button);
}
break;
}
case MotionNotify: {
log((CLOG_DEBUG "event: MotionNotify %d,%d", xevent.xmotion.x_root, xevent.xmotion.y_root));
SInt32 x, y;
if (!m_active) {
x = xevent.xmotion.x_root;
y = xevent.xmotion.y_root;
m_server->onMouseMovePrimary(x, y);
}
else {
// FIXME -- slurp up all remaining motion events?
// probably not since key strokes may go to wrong place.
// get mouse deltas
Window root, window;
int xRoot, yRoot, xWindow, yWindow;
unsigned int mask;
if (!::XQueryPointer(m_display, m_window, &root, &window,
&xRoot, &yRoot, &xWindow, &yWindow, &mask))
break;
x = xRoot - (m_w >> 1);
y = yRoot - (m_h >> 1);
// warp mouse back to center
warpCursor(m_w >> 1, m_h >> 1);
m_server->onMouseMoveSecondary(x, y);
}
break;
}
/*
case SelectionClear:
target->XXX(xevent.xselectionclear.);
break;
case SelectionNotify:
target->XXX(xevent.xselection.);
break;
case SelectionRequest:
target->XXX(xevent.xselectionrequest.);
break;
*/
}
}
}
KeyModifierMask CXWindowsPrimaryScreen::mapModifier(
unsigned int state) const
{
// FIXME -- should be configurable
KeyModifierMask mask = 0;
if (state & 1)
mask |= KeyModifierShift;
if (state & 2)
mask |= KeyModifierCapsLock;
if (state & 4)
mask |= KeyModifierControl;
if (state & 8)
mask |= KeyModifierAlt;
if (state & 16)
mask |= KeyModifierNumLock;
if (state & 32)
mask |= KeyModifierMeta;
if (state & 128)
mask |= KeyModifierScrollLock;
return mask;
}
KeyID CXWindowsPrimaryScreen::mapKey(
KeyCode keycode, KeyModifierMask mask) const
{
int index;
if (mask & KeyModifierShift)
index = 1;
else
index = 0;
return static_cast<KeyID>(::XKeycodeToKeysym(m_display, keycode, index));
}
ButtonID CXWindowsPrimaryScreen::mapButton(
unsigned int button) const
{
// FIXME -- should use button mapping?
if (button >= 1 && button <= 3)
return static_cast<ButtonID>(button);
else
return kButtonNone;
}
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