barrier/server/CXWindowsPrimaryScreen.cpp

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#include "CXWindowsPrimaryScreen.h"
#include "CServer.h"
#include "CThread.h"
#include "CLog.h"
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#include <assert.h>
#include <X11/X.h>
#include <X11/Xutil.h>
#define XK_MISCELLANY
#include <X11/keysymdef.h>
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//
// CXWindowsPrimaryScreen
//
CXWindowsPrimaryScreen::CXWindowsPrimaryScreen() :
m_server(NULL),
m_active(false),
m_window(None)
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{
// do nothing
}
CXWindowsPrimaryScreen::~CXWindowsPrimaryScreen()
{
assert(m_window == None);
}
void CXWindowsPrimaryScreen::run()
{
for (;;) {
// wait for and get the next event
XEvent xevent;
if (!getEvent(&xevent)) {
break;
}
// handle event
switch (xevent.type) {
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case CreateNotify: {
// select events on new window
CDisplayLock display(this);
selectEvents(display, xevent.xcreatewindow.window);
break;
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}
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case MappingNotify: {
// keyboard mapping changed
CDisplayLock display(this);
XRefreshKeyboardMapping(&xevent.xmapping);
break;
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}
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case KeyPress: {
log((CLOG_DEBUG1 "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);
if (key != kKeyNone) {
m_server->onKeyDown(key, mask);
if (key == XK_Caps_Lock && m_capsLockHalfDuplex)
m_server->onKeyUp(key, mask | KeyModifierCapsLock);
}
break;
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}
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// FIXME -- simulate key repeat. X sends press/release for
// repeat. must detect auto repeat and use kKeyRepeat.
case KeyRelease: {
log((CLOG_DEBUG1 "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);
if (key != kKeyNone) {
if (key == XK_Caps_Lock && m_capsLockHalfDuplex)
m_server->onKeyDown(key, mask);
m_server->onKeyUp(key, mask);
}
break;
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}
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case ButtonPress: {
log((CLOG_DEBUG1 "event: ButtonPress button=%d", xevent.xbutton.button));
const ButtonID button = mapButton(xevent.xbutton.button);
if (button != kButtonNone) {
m_server->onMouseDown(button);
}
break;
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}
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case ButtonRelease: {
log((CLOG_DEBUG1 "event: ButtonRelease button=%d", xevent.xbutton.button));
const ButtonID button = mapButton(xevent.xbutton.button);
if (button != kButtonNone) {
m_server->onMouseUp(button);
}
break;
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}
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case MotionNotify: {
log((CLOG_DEBUG2 "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
{
CDisplayLock display(this);
Window root, window;
int xRoot, yRoot, xWindow, yWindow;
unsigned int mask;
if (!XQueryPointer(display, m_window, &root, &window,
&xRoot, &yRoot, &xWindow, &yWindow, &mask))
break;
// compute position of center of window
SInt32 w, h;
getScreenSize(&w, &h);
x = xRoot - (w >> 1);
y = yRoot - (h >> 1);
// warp mouse back to center
warpCursorNoLock(display, w >> 1, h >> 1);
}
m_server->onMouseMoveSecondary(x, y);
}
break;
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}
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case SelectionClear:
// we just lost the selection. that means someone else
// grabbed the selection so this screen is now the
// selection owner. report that to the server.
if (lostClipboard(xevent.xselectionclear.selection,
xevent.xselectionclear.time)) {
m_server->grabClipboard(getClipboardID(
xevent.xselectionclear.selection));
}
break;
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case SelectionNotify:
// notification of selection transferred. we shouldn't
// get this here because we handle them in the selection
// retrieval methods. we'll just delete the property
// with the data (satisfying the usual ICCCM protocol).
if (xevent.xselection.property != None) {
CDisplayLock display(this);
XDeleteProperty(display, m_window, xevent.xselection.property);
}
break;
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case SelectionRequest:
// somebody is asking for clipboard data
if (xevent.xselectionrequest.owner == m_window) {
addClipboardRequest(m_window,
xevent.xselectionrequest.requestor,
xevent.xselectionrequest.selection,
xevent.xselectionrequest.target,
xevent.xselectionrequest.property,
xevent.xselectionrequest.time);
}
else {
// unknown window. return failure.
CDisplayLock display(this);
XEvent event;
event.xselection.type = SelectionNotify;
event.xselection.display = display;
event.xselection.requestor = xevent.xselectionrequest.requestor;
event.xselection.selection = xevent.xselectionrequest.selection;
event.xselection.target = xevent.xselectionrequest.target;
event.xselection.property = None;
event.xselection.time = xevent.xselectionrequest.time;
XSendEvent(display, xevent.xselectionrequest.requestor,
False, 0, &event);
}
break;
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case PropertyNotify:
// clipboard transfers involve property changes so forward
// the event to the superclass. we only care about the
// deletion of properties.
if (xevent.xproperty.state == PropertyDelete) {
processClipboardRequest(xevent.xproperty.window,
xevent.xproperty.atom,
xevent.xproperty.time);
}
break;
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case DestroyNotify:
// looks like one of the windows that requested a clipboard
// transfer has gone bye-bye.
destroyClipboardRequest(xevent.xdestroywindow.window);
break;
}
}
}
void CXWindowsPrimaryScreen::stop()
{
doStop();
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}
void CXWindowsPrimaryScreen::open(CServer* server)
{
assert(m_server == NULL);
assert(server != NULL);
// set the server
m_server = server;
// open the display
openDisplay();
// check for peculiarities
// FIXME -- may have to get these from some database
m_capsLockHalfDuplex = false;
// m_capsLockHalfDuplex = true;
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}
void CXWindowsPrimaryScreen::close()
{
assert(m_server != NULL);
// close the display
closeDisplay();
// done with server
m_server = NULL;
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}
void CXWindowsPrimaryScreen::enter(SInt32 x, SInt32 y)
{
log((CLOG_INFO "entering primary at %d,%d", x, y));
assert(m_active == true);
assert(m_window != None);
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CDisplayLock display(this);
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// warp to requested location
XWarpPointer(display, None, m_window, 0, 0, 0, 0, x, y);
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// unmap the grab window. this also ungrabs the mouse and keyboard.
XUnmapWindow(display, m_window);
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// remove all input events for grab window
XEvent event;
while (XCheckWindowEvent(display, m_window,
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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_active == false);
assert(m_window != None);
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CDisplayLock display(this);
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// raise and show the input window
XMapRaised(display, m_window);
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// 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(display, m_window, True, 0,
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GrabModeAsync, GrabModeAsync,
m_window, None, CurrentTime);
assert(result != GrabNotViewable);
if (result != GrabSuccess) {
log((CLOG_DEBUG2 "waiting to grab pointer"));
CThread::sleep(0.1);
}
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} while (result != GrabSuccess);
log((CLOG_DEBUG2 "grabbed pointer"));
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// now the keyboard
result = XGrabKeyboard(display, m_window, True,
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GrabModeAsync, GrabModeAsync, CurrentTime);
assert(result != GrabNotViewable);
if (result != GrabSuccess) {
// back off to avoid grab deadlock
XUngrabPointer(display, CurrentTime);
log((CLOG_DEBUG2 "ungrabbed pointer, waiting to grab keyboard"));
CThread::sleep(0.1);
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}
} while (result != GrabSuccess);
log((CLOG_DEBUG1 "grabbed pointer and keyboard"));
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// move the mouse to the center of grab window
SInt32 w, h;
getScreenSize(&w, &h);
warpCursorNoLock(display, w >> 1, h >> 1);
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// local client now active
m_active = true;
}
void CXWindowsPrimaryScreen::warpCursor(SInt32 x, SInt32 y)
{
CDisplayLock display(this);
warpCursorNoLock(display, x, y);
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}
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void CXWindowsPrimaryScreen::warpCursorNoLock(
Display* display, SInt32 x, SInt32 y)
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{
assert(display != NULL);
assert(m_window != None);
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// warp the mouse
XWarpPointer(display, None, getRoot(), 0, 0, 0, 0, x, y);
XSync(display, False);
log((CLOG_DEBUG1 "warped to %d,%d", x, y));
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// discard mouse events since we just added one we don't want
XEvent xevent;
while (XCheckWindowEvent(display, m_window,
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PointerMotionMask, &xevent)) {
// do nothing
}
}
void CXWindowsPrimaryScreen::setClipboard(
ClipboardID id, const IClipboard* clipboard)
{
setDisplayClipboard(id, clipboard, m_window, getCurrentTime(m_window));
}
void CXWindowsPrimaryScreen::grabClipboard(ClipboardID id)
{
setDisplayClipboard(id, NULL, m_window, getCurrentTime(m_window));
}
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void CXWindowsPrimaryScreen::getSize(
SInt32* width, SInt32* height) const
{
getScreenSize(width, height);
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}
SInt32 CXWindowsPrimaryScreen::getJumpZoneSize() const
{
return 1;
}
void CXWindowsPrimaryScreen::getClipboard(
ClipboardID id, IClipboard* clipboard) const
{
getDisplayClipboard(id, clipboard, m_window, getCurrentTime(m_window));
}
void CXWindowsPrimaryScreen::onOpenDisplay()
{
assert(m_window == None);
CDisplayLock display(this);
// get size of screen
SInt32 w, h;
getScreenSize(&w, &h);
// 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 | PropertyChangeMask;
attr.do_not_propagate_mask = 0;
attr.override_redirect = True;
attr.cursor = createBlankCursor();
m_window = XCreateWindow(display, getRoot(), 0, 0, w, h, 0, 0,
InputOnly, CopyFromParent,
CWDontPropagate | CWEventMask |
CWOverrideRedirect | CWCursor,
&attr);
// start watching for events on other windows
selectEvents(display, getRoot());
}
void CXWindowsPrimaryScreen::onCloseDisplay()
{
assert(m_window != None);
// destroy window
CDisplayLock display(this);
XDestroyWindow(display, m_window);
m_window = None;
}
long CXWindowsPrimaryScreen::getEventMask(Window w) const
{
if (w == m_window)
return PointerMotionMask |// PointerMotionHintMask |
ButtonPressMask | ButtonReleaseMask |
KeyPressMask | KeyReleaseMask |
KeymapStateMask;
else
return PointerMotionMask | SubstructureNotifyMask;
}
void CXWindowsPrimaryScreen::selectEvents(
Display* display, Window w) const
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{
// 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(display, w, PointerMotionMask | SubstructureNotifyMask);
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// recurse on child windows
Window rw, pw, *cw;
unsigned int nc;
if (XQueryTree(display, w, &rw, &pw, &cw, &nc)) {
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for (unsigned int i = 0; i < nc; ++i)
selectEvents(display, cw[i]);
XFree(cw);
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}
}
KeyModifierMask CXWindowsPrimaryScreen::mapModifier(
unsigned int state) const
{
// FIXME -- should be configurable
KeyModifierMask mask = 0;
if (state & ShiftMask)
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mask |= KeyModifierShift;
if (state & LockMask)
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mask |= KeyModifierCapsLock;
if (state & ControlMask)
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mask |= KeyModifierControl;
if (state & Mod1Mask)
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mask |= KeyModifierAlt;
if (state & Mod2Mask)
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mask |= KeyModifierNumLock;
if (state & Mod4Mask)
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mask |= KeyModifierMeta;
if (state & Mod5Mask)
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mask |= KeyModifierScrollLock;
return mask;
}
KeyID CXWindowsPrimaryScreen::mapKey(XKeyEvent* event) const
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{
KeySym keysym;
char dummy[1];
CDisplayLock display(this);
XLookupString(event, dummy, 0, &keysym, NULL);
return static_cast<KeyID>(keysym);
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}
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;
}