mirror of
https://github.com/debauchee/barrier.git
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64232c7854
now speaks to the primary screen and secondary screens almost everywhere the same way through an IClient interface; only special primary screen calls are accessed through a different interface, the CPrimaryClient interface. this simplifies the server since it no longer needs to test whether the active screen is the primary or a secondary in most cases. the server no longer speaks directly to the primary screen; all that goes through the CPrimaryClient, which often just forwards the call. the primary screen no longer speaks directly to the server either, again going through the CPrimaryClient via a IPrimaryReceiver interface. CServerProtocol classes have been replaced by CClientProxy classes which are very similar. the name makes more sense though.
742 lines
19 KiB
C++
742 lines
19 KiB
C++
#include "CXWindowsPrimaryScreen.h"
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#include "IPrimaryReceiver.h"
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#include "CXWindowsClipboard.h"
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#include "CXWindowsScreenSaver.h"
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#include "CXWindowsUtil.h"
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#include "CClipboard.h"
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#include "CThread.h"
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#include "CLog.h"
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#include "CStopwatch.h"
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#if defined(X_DISPLAY_MISSING)
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# error X11 is required to build synergy
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#else
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# include <X11/X.h>
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# include <X11/Xutil.h>
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# define XK_MISCELLANY
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# include <X11/keysymdef.h>
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#endif
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//
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// CXWindowsPrimaryScreen
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//
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CXWindowsPrimaryScreen::CXWindowsPrimaryScreen(IPrimaryReceiver* receiver) :
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m_receiver(receiver),
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m_active(false),
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m_window(None)
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{
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// do nothing
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}
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CXWindowsPrimaryScreen::~CXWindowsPrimaryScreen()
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{
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assert(m_window == None);
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}
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void
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CXWindowsPrimaryScreen::run()
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{
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for (;;) {
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// wait for and get the next event
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XEvent xevent;
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if (!getEvent(&xevent)) {
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break;
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}
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// handle event
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switch (xevent.type) {
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case CreateNotify:
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{
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// select events on new window
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CDisplayLock display(this);
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selectEvents(display, xevent.xcreatewindow.window);
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}
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break;
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case MappingNotify:
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{
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// keyboard mapping changed
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CDisplayLock display(this);
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XRefreshKeyboardMapping(&xevent.xmapping);
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updateModifierMap(display);
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}
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break;
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case ClientMessage:
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if (xevent.xclient.message_type == m_atomScreenSaver ||
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xevent.xclient.format == 32) {
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// screen saver activation/deactivation event
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m_receiver->onScreenSaver(xevent.xclient.data.l[0] != 0);
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}
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break;
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case KeyPress:
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{
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log((CLOG_DEBUG1 "event: KeyPress code=%d, state=0x%04x", xevent.xkey.keycode, xevent.xkey.state));
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const KeyModifierMask mask = mapModifier(xevent.xkey.state);
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const KeyID key = mapKey(&xevent.xkey);
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if (key != kKeyNone) {
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m_receiver->onKeyDown(key, mask);
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if (key == XK_Caps_Lock && m_capsLockHalfDuplex) {
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m_receiver->onKeyUp(key, mask | KeyModifierCapsLock);
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}
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else if (key == XK_Num_Lock && m_numLockHalfDuplex) {
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m_receiver->onKeyUp(key, mask | KeyModifierNumLock);
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}
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}
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}
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break;
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case KeyRelease:
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{
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const KeyModifierMask mask = mapModifier(xevent.xkey.state);
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const KeyID key = mapKey(&xevent.xkey);
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if (key != kKeyNone) {
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// check if this is a key repeat by getting the next
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// KeyPress event that has the same key and time as
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// this release event, if any. first prepare the
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// filter info.
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CKeyEventInfo filter;
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filter.m_event = KeyPress;
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filter.m_window = xevent.xkey.window;
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filter.m_time = xevent.xkey.time;
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filter.m_keycode = xevent.xkey.keycode;
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// now check for event
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XEvent xevent2;
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CDisplayLock display(this);
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if (XCheckIfEvent(display, &xevent2,
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&CXWindowsPrimaryScreen::findKeyEvent,
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(XPointer)&filter) != True) {
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// no press event follows so it's a plain release
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log((CLOG_DEBUG1 "event: KeyRelease code=%d, state=0x%04x", xevent.xkey.keycode, xevent.xkey.state));
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if (key == XK_Caps_Lock && m_capsLockHalfDuplex) {
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m_receiver->onKeyDown(key, mask);
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}
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else if (key == XK_Num_Lock && m_numLockHalfDuplex) {
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m_receiver->onKeyDown(key, mask);
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}
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m_receiver->onKeyUp(key, mask);
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}
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else {
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// found a press event following so it's a repeat.
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// we could attempt to count the already queued
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// repeats but we'll just send a repeat of 1.
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// note that we discard the press event.
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log((CLOG_DEBUG1 "event: repeat code=%d, state=0x%04x", xevent.xkey.keycode, xevent.xkey.state));
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m_receiver->onKeyRepeat(key, mask, 1);
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}
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}
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}
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break;
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case ButtonPress:
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{
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log((CLOG_DEBUG1 "event: ButtonPress button=%d", xevent.xbutton.button));
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const ButtonID button = mapButton(xevent.xbutton.button);
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if (button != kButtonNone) {
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m_receiver->onMouseDown(button);
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}
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}
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break;
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case ButtonRelease:
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{
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log((CLOG_DEBUG1 "event: ButtonRelease button=%d", xevent.xbutton.button));
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const ButtonID button = mapButton(xevent.xbutton.button);
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if (button != kButtonNone) {
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m_receiver->onMouseUp(button);
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}
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else if (xevent.xbutton.button == 4) {
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// wheel forward (away from user)
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m_receiver->onMouseWheel(120);
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}
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else if (xevent.xbutton.button == 5) {
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// wheel backward (toward user)
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m_receiver->onMouseWheel(-120);
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}
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}
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break;
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case MotionNotify:
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{
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log((CLOG_DEBUG2 "event: MotionNotify %d,%d", xevent.xmotion.x_root, xevent.xmotion.y_root));
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// compute motion delta (relative to the last known
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// mouse position)
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SInt32 x = xevent.xmotion.x_root - m_x;
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SInt32 y = xevent.xmotion.y_root - m_y;
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// save position to compute delta of next motion
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m_x = xevent.xmotion.x_root;
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m_y = xevent.xmotion.y_root;
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if (xevent.xmotion.send_event) {
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// we warped the mouse. discard events until we
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// find the matching sent event. see
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// warpCursorNoLockNoFlush() for where the events
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// are sent. we discard the matching sent event
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// and can be sure we've skipped the warp event.
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CDisplayLock display(this);
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do {
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XMaskEvent(display, PointerMotionMask, &xevent);
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} while (!xevent.xmotion.send_event);
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}
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else if (!m_active) {
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// motion on primary screen
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m_receiver->onMouseMovePrimary(m_x, m_y);
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}
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else {
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// motion on secondary screen. warp mouse back to
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// center.
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//
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// my lombard (powerbook g3) running linux and
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// using the adbmouse driver has two problems:
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// first, the driver only sends motions of +/-2
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// pixels and, second, it seems to discard some
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// physical input after a warp. the former isn't a
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// big deal (we're just limited to every other
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// pixel) but the latter is a PITA. to work around
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// it we only warp when the mouse has moved more
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// than s_size pixels from the center.
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static const SInt32 s_size = 32;
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if (xevent.xmotion.x_root - m_xCenter < -s_size ||
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xevent.xmotion.x_root - m_xCenter > s_size ||
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xevent.xmotion.y_root - m_yCenter < -s_size ||
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xevent.xmotion.y_root - m_yCenter > s_size) {
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CDisplayLock display(this);
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warpCursorNoLockNoFlush(display, m_xCenter, m_yCenter);
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}
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// send event if mouse moved. do this after warping
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// back to center in case the motion takes us onto
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// the primary screen. if we sent the event first
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// in that case then the warp would happen after
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// warping to the primary screen's enter position,
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// effectively overriding it.
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if (x != 0 || y != 0) {
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m_receiver->onMouseMoveSecondary(x, y);
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}
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}
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}
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break;
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}
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}
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}
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void
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CXWindowsPrimaryScreen::stop()
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{
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CDisplayLock display(this);
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doStop();
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}
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void
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CXWindowsPrimaryScreen::open()
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{
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// open the display
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openDisplay();
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// check for peculiarities
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// FIXME -- may have to get these from some database
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m_numLockHalfDuplex = false;
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m_capsLockHalfDuplex = false;
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// m_numLockHalfDuplex = true;
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// m_capsLockHalfDuplex = true;
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// get screen shape
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SInt32 x, y, w, h;
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getScreenShape(x, y, w, h);
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{
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CDisplayLock display(this);
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// get notified of screen saver activation/deactivation
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m_atomScreenSaver = XInternAtom(display, "SCREENSAVER", False);
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getScreenSaver()->setNotify(m_window);
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// update key state
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updateModifierMap(display);
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// get mouse position
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Window root, window;
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int mx, my, xWindow, yWindow;
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unsigned int mask;
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if (!XQueryPointer(display, m_window, &root, &window,
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&mx, &my, &xWindow, &yWindow, &mask)) {
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mx = w >> 1;
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my = h >> 1;
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}
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// save mouse position
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m_x = x;
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m_y = y;
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}
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// save position of center of screen
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m_xCenter = x + (w >> 1);
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m_yCenter = y + (h >> 1);
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// send screen info
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m_receiver->onInfoChanged(x, y, w, h, 1, m_x, m_y);
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}
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void
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CXWindowsPrimaryScreen::close()
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{
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// stop being notified of screen saver activation/deactivation
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getScreenSaver()->setNotify(None);
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m_atomScreenSaver = None;
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// close the display
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closeDisplay();
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}
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void
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CXWindowsPrimaryScreen::enter(SInt32 x, SInt32 y, bool forScreenSaver)
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{
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log((CLOG_INFO "entering primary at %d,%d%s", x, y, forScreenSaver ? " for screen saver" : ""));
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assert(m_active == true);
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assert(m_window != None);
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CDisplayLock display(this);
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// unmap the grab window. this also ungrabs the mouse and keyboard.
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XUnmapWindow(display, m_window);
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// warp to requested location
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if (!forScreenSaver) {
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warpCursorNoLock(display, x, y);
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}
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// redirect input to root window. do not warp the mouse because
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// that will deactivate the screen saver.
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else {
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XSetInputFocus(display, PointerRoot, PointerRoot, CurrentTime);
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}
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// not active anymore
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m_active = false;
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}
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bool
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CXWindowsPrimaryScreen::leave()
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{
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log((CLOG_INFO "leaving primary"));
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assert(m_active == false);
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assert(m_window != None);
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CDisplayLock display(this);
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// raise and show the input window
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XMapRaised(display, m_window);
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// grab the mouse and keyboard. keep trying until we get them.
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// if we can't grab one after grabbing the other then ungrab
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// and wait before retrying. give up after s_timeout seconds.
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static const double s_timeout = 1.0;
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int result;
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CStopwatch timer;
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do {
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// keyboard first
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do {
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result = XGrabKeyboard(display, m_window, True,
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GrabModeAsync, GrabModeAsync, CurrentTime);
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assert(result != GrabNotViewable);
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if (result != GrabSuccess) {
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log((CLOG_DEBUG2 "waiting to grab keyboard"));
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CThread::sleep(0.05);
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if (timer.getTime() >= s_timeout) {
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log((CLOG_DEBUG2 "grab keyboard timed out"));
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XUnmapWindow(display, m_window);
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return false;
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}
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}
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} while (result != GrabSuccess);
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log((CLOG_DEBUG2 "grabbed keyboard"));
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// now the mouse
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result = XGrabPointer(display, m_window, True, 0,
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GrabModeAsync, GrabModeAsync,
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m_window, None, CurrentTime);
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assert(result != GrabNotViewable);
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if (result != GrabSuccess) {
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// back off to avoid grab deadlock
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XUngrabKeyboard(display, CurrentTime);
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log((CLOG_DEBUG2 "ungrabbed keyboard, waiting to grab pointer"));
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CThread::sleep(0.05);
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if (timer.getTime() >= s_timeout) {
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log((CLOG_DEBUG2 "grab pointer timed out"));
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XUnmapWindow(display, m_window);
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return false;
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}
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}
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} while (result != GrabSuccess);
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log((CLOG_DEBUG1 "grabbed pointer and keyboard"));
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// warp mouse to center
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warpCursorNoLock(display, m_xCenter, m_yCenter);
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// local client now active
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m_active = true;
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return true;
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}
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void
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CXWindowsPrimaryScreen::reconfigure()
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{
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// do nothing
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}
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void
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CXWindowsPrimaryScreen::warpCursor(SInt32 x, SInt32 y)
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{
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CDisplayLock display(this);
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warpCursorNoLock(display, x, y);
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}
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void
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CXWindowsPrimaryScreen::warpCursorNoLock(Display* display, SInt32 x, SInt32 y)
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{
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// warp mouse
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warpCursorNoLockNoFlush(display, x, y);
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// remove all input events before and including warp
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XEvent event;
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while (XCheckMaskEvent(display, PointerMotionMask |
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ButtonPressMask | ButtonReleaseMask |
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KeyPressMask | KeyReleaseMask |
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KeymapStateMask,
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&event)) {
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// do nothing
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}
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// save position as last position
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m_x = x;
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m_y = y;
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}
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void
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CXWindowsPrimaryScreen::warpCursorNoLockNoFlush(
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Display* display, SInt32 x, SInt32 y)
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{
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assert(display != NULL);
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assert(m_window != None);
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// send an event that we can recognize before the mouse warp
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XEvent eventBefore;
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eventBefore.type = MotionNotify;
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eventBefore.xmotion.display = display;
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eventBefore.xmotion.window = m_window;
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eventBefore.xmotion.root = getRoot();
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eventBefore.xmotion.subwindow = m_window;
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eventBefore.xmotion.time = CurrentTime;
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eventBefore.xmotion.x = x;
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eventBefore.xmotion.y = y;
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eventBefore.xmotion.x_root = x;
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eventBefore.xmotion.y_root = y;
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eventBefore.xmotion.state = 0;
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eventBefore.xmotion.is_hint = False;
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eventBefore.xmotion.same_screen = True;
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XEvent eventAfter = eventBefore;
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XSendEvent(display, m_window, False, 0, &eventBefore);
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// warp mouse
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XWarpPointer(display, None, getRoot(), 0, 0, 0, 0, x, y);
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// send an event that we can recognize after the mouse warp
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XSendEvent(display, m_window, False, 0, &eventAfter);
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XSync(display, False);
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log((CLOG_DEBUG2 "warped to %d,%d", x, y));
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}
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void
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CXWindowsPrimaryScreen::setClipboard(ClipboardID id,
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const IClipboard* clipboard)
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{
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setDisplayClipboard(id, clipboard);
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}
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void
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CXWindowsPrimaryScreen::grabClipboard(ClipboardID id)
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{
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setDisplayClipboard(id, NULL);
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}
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void
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CXWindowsPrimaryScreen::getClipboard(ClipboardID id,
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IClipboard* clipboard) const
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{
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getDisplayClipboard(id, clipboard);
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}
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KeyModifierMask
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CXWindowsPrimaryScreen::getToggleMask() const
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{
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CDisplayLock display(this);
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// query the pointer to get the keyboard state
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// FIXME -- is there a better way to do this?
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Window root, window;
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int xRoot, yRoot, xWindow, yWindow;
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unsigned int state;
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if (!XQueryPointer(display, m_window, &root, &window,
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&xRoot, &yRoot, &xWindow, &yWindow, &state)) {
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return 0;
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}
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// convert to KeyModifierMask
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KeyModifierMask mask = 0;
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if (state & m_numLockMask)
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mask |= KeyModifierNumLock;
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if (state & m_capsLockMask)
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mask |= KeyModifierCapsLock;
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if (state & m_scrollLockMask)
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mask |= KeyModifierScrollLock;
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return mask;
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}
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bool
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CXWindowsPrimaryScreen::isLockedToScreen() const
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{
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CDisplayLock display(this);
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// query the pointer to get the button state
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Window root, window;
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int xRoot, yRoot, xWindow, yWindow;
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unsigned int state;
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if (XQueryPointer(display, m_window, &root, &window,
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&xRoot, &yRoot, &xWindow, &yWindow, &state)) {
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if ((state & (Button1Mask | Button2Mask | Button3Mask |
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Button4Mask | Button5Mask)) != 0) {
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return true;
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}
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}
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// get logical keyboard state
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char keyMap[32];
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memset(keyMap, 0, sizeof(keyMap));
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XQueryKeymap(display, keyMap);
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// locked if any key is down
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for (unsigned int i = 0; i < sizeof(keyMap); ++i) {
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|
if (keyMap[i] != 0) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// not locked
|
|
return false;
|
|
}
|
|
|
|
void
|
|
CXWindowsPrimaryScreen::onOpenDisplay(Display* display)
|
|
{
|
|
assert(m_window == None);
|
|
|
|
// get size of screen
|
|
SInt32 x, y, w, h;
|
|
getScreenShape(x, y, 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(), x, y, w, h, 0, 0,
|
|
InputOnly, CopyFromParent,
|
|
CWDontPropagate | CWEventMask |
|
|
CWOverrideRedirect | CWCursor,
|
|
&attr);
|
|
log((CLOG_DEBUG "window is 0x%08x", m_window));
|
|
|
|
// start watching for events on other windows
|
|
selectEvents(display, getRoot());
|
|
}
|
|
|
|
CXWindowsClipboard*
|
|
CXWindowsPrimaryScreen::createClipboard(ClipboardID id)
|
|
{
|
|
CDisplayLock display(this);
|
|
return new CXWindowsClipboard(display, m_window, id);
|
|
}
|
|
|
|
void
|
|
CXWindowsPrimaryScreen::onCloseDisplay(Display* display)
|
|
{
|
|
assert(m_window != None);
|
|
|
|
// destroy window
|
|
if (display != NULL) {
|
|
XDestroyWindow(display, m_window);
|
|
}
|
|
m_window = None;
|
|
}
|
|
|
|
void
|
|
CXWindowsPrimaryScreen::onUnexpectedClose()
|
|
{
|
|
// tell server to shutdown
|
|
m_receiver->onError();
|
|
}
|
|
|
|
void
|
|
CXWindowsPrimaryScreen::onLostClipboard(ClipboardID id)
|
|
{
|
|
// tell server that the clipboard was grabbed locally
|
|
m_receiver->onGrabClipboard(id);
|
|
}
|
|
|
|
void
|
|
CXWindowsPrimaryScreen::selectEvents(Display* display, Window w) const
|
|
{
|
|
// ignore errors while we adjust event masks. windows could be
|
|
// destroyed at any time after the XQueryTree() in doSelectEvents()
|
|
// so we must ignore BadWindow errors.
|
|
CXWindowsUtil::CErrorLock lock(display);
|
|
|
|
// adjust event masks
|
|
doSelectEvents(display, w);
|
|
}
|
|
|
|
void
|
|
CXWindowsPrimaryScreen::doSelectEvents(Display* display, 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.
|
|
//
|
|
// note that this can break certain clients due a design flaw of X.
|
|
// X will deliver a PointerMotion event to the deepest window in the
|
|
// hierarchy that contains the pointer and has PointerMotionMask
|
|
// selected by *any* client. if another client doesn't select
|
|
// motion events in a subwindow so the parent window will get them
|
|
// then by selecting for motion events on the subwindow we break
|
|
// that client because the parent will no longer get the events.
|
|
|
|
// FIXME -- should provide some workaround for event selection
|
|
// design flaw. perhaps only select for motion events on windows
|
|
// that already do or are top-level windows or don't propagate
|
|
// pointer events. or maybe an option to simply poll the mouse.
|
|
|
|
// we don't want to adjust our grab window
|
|
if (w == m_window) {
|
|
return;
|
|
}
|
|
|
|
// select events of interest. do this before querying the tree so
|
|
// we'll get notifications of children created after the XQueryTree()
|
|
// so we won't miss them.
|
|
XSelectInput(display, w, PointerMotionMask | SubstructureNotifyMask);
|
|
|
|
// recurse on child windows
|
|
Window rw, pw, *cw;
|
|
unsigned int nc;
|
|
if (XQueryTree(display, w, &rw, &pw, &cw, &nc)) {
|
|
for (unsigned int i = 0; i < nc; ++i) {
|
|
doSelectEvents(display, cw[i]);
|
|
}
|
|
XFree(cw);
|
|
}
|
|
}
|
|
|
|
KeyModifierMask
|
|
CXWindowsPrimaryScreen::mapModifier(unsigned int state) const
|
|
{
|
|
// FIXME -- should be configurable
|
|
KeyModifierMask mask = 0;
|
|
if (state & ShiftMask)
|
|
mask |= KeyModifierShift;
|
|
if (state & LockMask)
|
|
mask |= KeyModifierCapsLock;
|
|
if (state & ControlMask)
|
|
mask |= KeyModifierControl;
|
|
if (state & Mod1Mask)
|
|
mask |= KeyModifierAlt;
|
|
if (state & Mod2Mask)
|
|
mask |= KeyModifierNumLock;
|
|
if (state & Mod4Mask)
|
|
mask |= KeyModifierMeta;
|
|
if (state & Mod5Mask)
|
|
mask |= KeyModifierScrollLock;
|
|
return mask;
|
|
}
|
|
|
|
KeyID
|
|
CXWindowsPrimaryScreen::mapKey(XKeyEvent* event) const
|
|
{
|
|
KeySym keysym;
|
|
char dummy[1];
|
|
|
|
CDisplayLock display(this);
|
|
XLookupString(event, dummy, 0, &keysym, NULL);
|
|
return static_cast<KeyID>(keysym);
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
void
|
|
CXWindowsPrimaryScreen::updateModifierMap(Display* display)
|
|
{
|
|
// get modifier map from server
|
|
XModifierKeymap* keymap = XGetModifierMapping(display);
|
|
|
|
// initialize
|
|
m_numLockMask = 0;
|
|
m_capsLockMask = 0;
|
|
m_scrollLockMask = 0;
|
|
|
|
// set keycodes and masks
|
|
for (unsigned int i = 0; i < 8; ++i) {
|
|
const unsigned int bit = (1 << i);
|
|
for (int j = 0; j < keymap->max_keypermod; ++j) {
|
|
KeyCode keycode = keymap->modifiermap[i *
|
|
keymap->max_keypermod + j];
|
|
|
|
// note toggle modifier bits
|
|
const KeySym keysym = XKeycodeToKeysym(display, keycode, 0);
|
|
if (keysym == XK_Num_Lock) {
|
|
m_numLockMask |= bit;
|
|
}
|
|
else if (keysym == XK_Caps_Lock) {
|
|
m_capsLockMask |= bit;
|
|
}
|
|
else if (keysym == XK_Scroll_Lock) {
|
|
m_scrollLockMask |= bit;
|
|
}
|
|
}
|
|
}
|
|
|
|
XFreeModifiermap(keymap);
|
|
}
|
|
|
|
Bool
|
|
CXWindowsPrimaryScreen::findKeyEvent(Display*, XEvent* xevent, XPointer arg)
|
|
{
|
|
CKeyEventInfo* filter = reinterpret_cast<CKeyEventInfo*>(arg);
|
|
return (xevent->type == filter->m_event &&
|
|
xevent->xkey.window == filter->m_window &&
|
|
xevent->xkey.time == filter->m_time &&
|
|
xevent->xkey.keycode == filter->m_keycode) ? True : False;
|
|
}
|