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Allow screen switching on local XInput 

Allows to switch from client to server and vice versa if
local input is detected, e.g. a touchscreen input or a
mouse click if clients also have input devices
This commit is contained in:
Florian Hofhammer 2020-08-18 12:03:02 +02:00
parent 5a02070b54
commit b891b1e630
No known key found for this signature in database
GPG Key ID: 96EB27BA315FC77C
15 changed files with 272 additions and 48 deletions
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1
src/lib/barrier/protocol_types.cpp
View File

@ -29,6 +29,7 @@ const char* kMsgCScreenSaver = "CSEC%1i";
const char* kMsgCResetOptions = "CROP";
const char* kMsgCInfoAck = "CIAK";
const char* kMsgCKeepAlive = "CALV";
const char* kMsgCLocalInput = "CLIN%2i%2i";
const char* kMsgDKeyDown = "DKDN%2i%2i%2i";
const char* kMsgDKeyDown1_0 = "DKDN%2i%2i";
const char* kMsgDKeyRepeat = "DKRP%2i%2i%2i%2i";

7
src/lib/barrier/protocol_types.h
View File

@ -29,9 +29,10 @@
// 1.4: adds crypto support
// 1.5: adds file transfer and removes home brew crypto
// 1.6: adds clipboard streaming
// 1.7: adds focus/screen switch on local input
// NOTE: with new version, barrier minor version should increment
static const SInt16 kProtocolMajorVersion = 1;
static const SInt16 kProtocolMinorVersion = 6;
static const SInt16 kProtocolMinorVersion = 7;
// default contact port number
static const UInt16 kDefaultPort = 24800;
@ -172,6 +173,10 @@ extern const char* kMsgCInfoAck;
// defined by an option.
extern const char* kMsgCKeepAlive;
// Local input: secondary -> primary
// Inform primary about local input to request focus
extern const char* kMsgCLocalInput;
//
// data codes
//

1
src/lib/base/EventTypes.cpp
View File

@ -177,6 +177,7 @@ REGISTER_EVENT(IPrimaryScreen, fakeInputEnd)
REGISTER_EVENT(IScreen, error)
REGISTER_EVENT(IScreen, shapeChanged)
REGISTER_EVENT(IScreen, localInput)
REGISTER_EVENT(IScreen, suspend)
REGISTER_EVENT(IScreen, resume)

10
src/lib/base/EventTypes.h
View File

@ -651,6 +651,7 @@ public:
IScreenEvents() :
m_error(Event::kUnknown),
m_shapeChanged(Event::kUnknown),
m_localInput(Event::kUnknown),
m_suspend(Event::kUnknown),
m_resume(Event::kUnknown) { }
@ -671,6 +672,14 @@ public:
*/
Event::Type shapeChanged();
//! Get local input event type
/*!
Returns the local input event type. This is sent when the cursor
is not on the current screen but a local input is detected (e.g.
via touchscreen inputs or mouse movements).
*/
Event::Type localInput();
//! Get suspend event type
/*!
Returns the suspend event type. This is sent whenever the system goes
@ -690,6 +699,7 @@ public:
private:
Event::Type m_error;
Event::Type m_shapeChanged;
Event::Type m_localInput;
Event::Type m_suspend;
Event::Type m_resume;
};

14
src/lib/client/Client.cpp
View File

@ -508,6 +508,10 @@ Client::setupScreen()
getEventTarget(),
new TMethodEventJob<Client>(this,
&Client::handleClipboardGrabbed));
m_events->adoptHandler(m_events->forIScreen().localInput(),
getEventTarget(),
new TMethodEventJob<Client>(this,
&Client::handleLocalInputEvent));
}
void
@ -564,6 +568,8 @@ Client::cleanupScreen()
getEventTarget());
m_events->removeHandler(m_events->forClipboard().clipboardGrabbed(),
getEventTarget());
m_events->removeHandler(m_events->forIScreen().localInput(),
getEventTarget());
delete m_server;
m_server = NULL;
}
@ -767,6 +773,14 @@ Client::handleStopRetry(const Event&, void*)
m_args.m_restartable = false;
}
void
Client::handleLocalInputEvent(const Event& event, void*)
{
IPlatformScreen::MotionInfo* info = static_cast<IPlatformScreen::MotionInfo*>(event.getData());
LOG((CLOG_DEBUG "Trigger screen switching caused by local input, screen coordinates (%d, %d)", info->m_x, info->m_y));
m_server->onLocalInput(info->m_x, info->m_y);
}
void
Client::writeToDropDirThread(void*)
{

1
src/lib/client/Client.h
View File

@ -191,6 +191,7 @@ private:
void handleFileChunkSending(const Event&, void*);
void handleFileRecieveCompleted(const Event&, void*);
void handleStopRetry(const Event&, void*);
void handleLocalInputEvent(const Event&, void*);
void onFileRecieveCompleted();
void sendClipboardThread(void*);

8
src/lib/client/ServerProxy.cpp
View File

@ -367,6 +367,14 @@ ServerProxy::onClipboardChanged(ClipboardID id, const IClipboard* clipboard)
StreamChunker::sendClipboard(data, data.size(), id, m_seqNum, m_events, this);
}
void
ServerProxy::onLocalInput(SInt32 x, SInt32 y)
{
// Coordinates as signed 32 bit integers don't make a lot of sense
// but are used for compatibility with e.g. IPlatformScreen::MotionInfo
ProtocolUtil::writef(m_stream, kMsgCLocalInput, x, y);
}
void
ServerProxy::flushCompressedMouse()
{

1
src/lib/client/ServerProxy.h
View File

@ -50,6 +50,7 @@ public:
void onInfoChanged();
bool onGrabClipboard(ClipboardID);
void onClipboardChanged(ClipboardID, const IClipboard*);
void onLocalInput(SInt32 x, SInt32 y);
//@}

67
src/lib/platform/XWindowsScreen.cpp
View File

@ -133,7 +133,7 @@ XWindowsScreen::XWindowsScreen(
#ifdef HAVE_XI2
m_xi2detected = detectXI2();
if (m_xi2detected) {
selectXIRawMotion();
selectXIRawEventsPrimary();
} else
#endif
{
@ -145,6 +145,12 @@ XWindowsScreen::XWindowsScreen(
openIM();
}
else {
#ifdef HAVE_XI2
m_xi2detected = detectXI2();
if (m_xi2detected) {
selectXIRawEventsSecondary();
}
#endif
// become impervious to server grabs
m_impl->XTestGrabControl(m_display, True);
}
@ -1218,14 +1224,33 @@ XWindowsScreen::handleSystemEvent(const Event& event, void*)
#ifdef HAVE_XI2
if (m_xi2detected) {
// Process RawMotion
// Process RawEvents
XGenericEventCookie *cookie = (XGenericEventCookie*)&xevent->xcookie;
if (m_impl->XGetEventData(m_display, cookie) &&
cookie->type == GenericEvent &&
cookie->extension == xi_opcode) {
LOGC(cookie->evtype == XI_RawTouchBegin, (CLOG_DEBUG1 "Touch begin on %s, onScreen = %s",
m_isPrimary ? "server" : "client",
m_isOnScreen ? "true" : "false"));
if (!m_isOnScreen && (cookie->evtype == XI_RawTouchBegin || cookie->evtype == XI_RawButtonPress )) {
// Touch or button press detected on local screen but cursor is not on screen => request focus from server
// Note: focus switching works on touch from client to server and vice versa, on mouse button press due
// to the nature of the shared server mouse only from server to client
SInt32 x, y;
// On touch event, getCursorPos sets x and y to the actual event coordinates. On mouse button press, x and
// y are set to the coordinates of the center of the screen.
// In the latter case, reusing m_x, m_y or m_xCursor, m_yCursor failed as they are not set on the client
// and thus trigger unexpected behavior (unexpected jumps to (0, 0) on button press)
getCursorPos(x, y);
sendEvent(m_events->forIScreen().localInput(), MotionInfo::alloc(x, y));
m_impl->XFreeEventData(m_display, cookie);
return;
}
if (cookie->evtype == XI_RawMotion) {
// Mouse motion detected on server => handle mouse motion
// Get current pointer's position
Window root, child;
XMotionEvent xmotion;
xmotion.type = MotionNotify;
xmotion.send_event = False; // Raw motion
@ -2062,17 +2087,43 @@ XWindowsScreen::detectXI2()
#ifdef HAVE_XI2
void
XWindowsScreen::selectXIRawMotion()
XWindowsScreen::selectXIRawEventsPrimary()
{
XIEventMask mask;
mask.deviceid = XIAllDevices;
mask.mask_len = XIMaskLen(XI_RawMotion);
mask.mask = (unsigned char*)calloc(mask.mask_len, sizeof(char));
mask.deviceid = XIAllMasterDevices;
memset(mask.mask, 0, 2);
mask.mask_len = XIMaskLen(XI_LASTEVENT);
mask.mask = (unsigned char*) calloc(mask.mask_len, sizeof(char));
LOGC((mask.mask == nullptr), (CLOG_ERR "Cannot listen on XI2 events due to memory error"));
XISetMask(mask.mask, XI_RawKeyRelease);
XISetMask(mask.mask, XI_RawMotion);
// Detect touchscreen events on primary screen (= server)
XISetMask(mask.mask, XI_RawTouchBegin);
XISetMask(mask.mask, XI_RawTouchUpdate);
XISetMask(mask.mask, XI_RawTouchEnd);
m_impl->XISelectEvents(m_display, DefaultRootWindow(m_display), &mask, 1);
free(mask.mask);
}
void
XWindowsScreen::selectXIRawEventsSecondary()
{
XIEventMask mask;
mask.deviceid = XIAllMasterDevices;
mask.mask_len = XIMaskLen(XI_LASTEVENT);
mask.mask = (unsigned char*) calloc(mask.mask_len, sizeof(char));
LOGC((mask.mask == nullptr), (CLOG_ERR "Cannot listen on XI2 events due to memory error"));
// Detect mouse button press events on secondary screens (= clients)
XISetMask(mask.mask, XI_RawButtonPress);
// Detect touchscreen events on secondary screens (= clients)
XISetMask(mask.mask, XI_RawTouchBegin);
XISetMask(mask.mask, XI_RawTouchUpdate);
XISetMask(mask.mask, XI_RawTouchEnd);
m_impl->XISelectEvents(m_display, DefaultRootWindow(m_display), &mask, 1);
free(mask.mask);
}

3
src/lib/platform/XWindowsScreen.h
View File

@ -144,7 +144,8 @@ private:
bool detectXI2();
#ifdef HAVE_XI2
void selectXIRawMotion();
void selectXIRawEventsPrimary();
void selectXIRawEventsSecondary();
#endif
void selectEvents(Window) const;
void doSelectEvents(Window) const;

59
src/lib/server/ClientProxy1_7.cpp Normal file
View File

@ -0,0 +1,59 @@
/*
* barrier -- mouse and keyboard sharing utility
* Copyright (C) 2015-2016 Symless Ltd.
*
* This package is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* found in the file LICENSE that should have accompanied this file.
*
* This package is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "server/ClientProxy1_7.h"
#include "server/Server.h"
#include "barrier/ProtocolUtil.h"
#include "barrier/StreamChunker.h"
#include "barrier/ClipboardChunk.h"
#include "io/IStream.h"
#include "base/TMethodEventJob.h"
#include "base/Log.h"
//
// ClientProxy1_7
//
ClientProxy1_7::ClientProxy1_7(const String& name, barrier::IStream* stream, Server* server, IEventQueue* events) :
ClientProxy1_6(name, stream, server, events),
m_events(events)
{
}
ClientProxy1_7::~ClientProxy1_7()
{
}
bool
ClientProxy1_7::parseMessage(const UInt8* code)
{
if (memcmp(code, kMsgCLocalInput, 4) == 0) {
SInt16 x, y;
ProtocolUtil::readf(getStream(), kMsgCLocalInput + 4, &x, &y);
// Set up container for x and y coordinates
IPlatformScreen::MotionInfo* info = IPlatformScreen::MotionInfo::alloc(x, y);
m_events->addEvent(Event(m_events->forIScreen().localInput(), getEventTarget(), info));
}
else {
return ClientProxy1_6::parseMessage(code);
}
return true;
}

38
src/lib/server/ClientProxy1_7.h Normal file
View File

@ -0,0 +1,38 @@
/*
* barrier -- mouse and keyboard sharing utility
* Copyright (C) 2015-2016 Symless Ltd.
*
* This package is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* found in the file LICENSE that should have accompanied this file.
*
* This package is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "server/ClientProxy1_6.h"
class Server;
class IEventQueue;
//! Proxy for client implementing protocol version 1.7
class ClientProxy1_7 : public ClientProxy1_6 {
public:
ClientProxy1_7(const String& name, barrier::IStream* adoptedStream, Server* server, IEventQueue* events);
~ClientProxy1_7();
virtual bool parseMessage(const UInt8* code);
private:
void handleClipboardSendingEvent(const Event&, void*);
private:
IEventQueue* m_events;
};

5
src/lib/server/ClientProxyUnknown.cpp
View File

@ -26,6 +26,7 @@
#include "server/ClientProxy1_4.h"
#include "server/ClientProxy1_5.h"
#include "server/ClientProxy1_6.h"
#include "server/ClientProxy1_7.h"
#include "barrier/protocol_types.h"
#include "barrier/ProtocolUtil.h"
#include "barrier/XBarrier.h"
@ -231,6 +232,10 @@ ClientProxyUnknown::handleData(const Event&, void*)
case 6:
m_proxy = new ClientProxy1_6(name, m_stream, m_server, m_events);
break;
case 7:
m_proxy = new ClientProxy1_7(name, m_stream, m_server, m_events);
break;
}
}

28
src/lib/server/Server.cpp
View File

@ -243,6 +243,14 @@ Server::~Server()
m_primaryClient->getEventTarget());
m_events->removeHandler(m_events->forIPrimaryScreen().screensaverDeactivated(),
m_primaryClient->getEventTarget());
m_events->removeHandler(m_events->forServer().switchToScreen(),
m_inputFilter);
m_events->removeHandler(m_events->forServer().switchInDirection(),
m_inputFilter);
m_events->removeHandler(m_events->forServer().keyboardBroadcast(),
m_inputFilter);
m_events->removeHandler(m_events->forServer().lockCursorToScreen(),
m_inputFilter);
m_events->removeHandler(m_events->forIPrimaryScreen().fakeInputBegin(),
m_inputFilter);
m_events->removeHandler(m_events->forIPrimaryScreen().fakeInputEnd(),
@ -1426,6 +1434,20 @@ Server::handleToggleScreenEvent(const Event& event, void*)
}
}
void
Server::handleLocalInputEvent(const Event& event, void* vclient)
{
BaseClientProxy* client = static_cast<BaseClientProxy*>(vclient);
IPlatformScreen::MotionInfo* info = static_cast<IPlatformScreen::MotionInfo*>(event.getData());
info = (info == nullptr) ? IPlatformScreen::MotionInfo::alloc(0, 0) : info;
LOG((CLOG_DEBUG "Trigger screen switching caused by local input on screen \"%s\", screen coordinates (%d, %d)", client->getName().c_str(), info->m_x, info->m_y));
// Record current cursor position on active screen
m_active->setJumpCursorPos(m_x, m_y);
// Do actual screen switching
switchScreen(client, info->m_x, info->m_y, false);
}
void
Server::handleSwitchInDirectionEvent(const Event& event, void*)
@ -2127,6 +2149,10 @@ Server::addClient(BaseClientProxy* client)
client->getEventTarget(),
new TMethodEventJob<Server>(this,
&Server::handleClipboardChanged, client));
m_events->adoptHandler(m_events->forIScreen().localInput(),
client->getEventTarget(),
new TMethodEventJob<Server>(this,
&Server::handleLocalInputEvent, client));
// add to list
m_clientSet.insert(client);
@ -2159,6 +2185,8 @@ Server::removeClient(BaseClientProxy* client)
client->getEventTarget());
m_events->removeHandler(m_events->forClipboard().clipboardChanged(),
client->getEventTarget());
m_events->removeHandler(m_events->forIScreen().localInput(),
client->getEventTarget());
// remove from list
m_clients.erase(getName(client));

1
src/lib/server/Server.h
View File

@ -309,6 +309,7 @@ private:
void handleClientCloseTimeout(const Event&, void*);
void handleSwitchToScreenEvent(const Event&, void*);
void handleToggleScreenEvent(const Event&, void*);
void handleLocalInputEvent(const Event&, void*);
void handleSwitchInDirectionEvent(const Event&, void*);
void handleKeyboardBroadcastEvent(const Event&,void*);
void handleLockCursorToScreenEvent(const Event&, void*);