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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software 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 software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#include <rfb_win32/DynamicFn.h>
#include <rfb_win32/MonitorInfo.h>
#include <rfb_win32/Win32Util.h>
#include <rdr/Exception.h>
#include <rfb/LogWriter.h>
#ifndef min
#define min(a,b) ((a)<(b)?(a):(b))
#endif
#ifndef max
#define max(a,b) ((a)>(b)?(a):(b))
#endif
using namespace rfb;
using namespace win32;
static LogWriter vlog("MonitorInfo");
// If we are building in multi-monitor support (i.e. the headers support it)
// then do dynamic imports of the required system calls, and provide any
// other code that wouldn't otherwise compile.
#ifdef RFB_HAVE_MONITORINFO
#include <tchar.h>
typedef HMONITOR (WINAPI *_MonitorFromWindow_proto)(HWND,DWORD);
static rfb::win32::DynamicFn<_MonitorFromWindow_proto> _MonitorFromWindow(_T("user32.dll"), "MonitorFromWindow");
typedef HMONITOR (WINAPI *_MonitorFromRect_proto)(LPCRECT,DWORD);
static rfb::win32::DynamicFn<_MonitorFromRect_proto> _MonitorFromRect(_T("user32.dll"), "MonitorFromRect");
typedef BOOL (WINAPI *_GetMonitorInfo_proto)(HMONITOR,LPMONITORINFO);
static rfb::win32::DynamicFn<_GetMonitorInfo_proto> _GetMonitorInfo(_T("user32.dll"), "GetMonitorInfoA");
typedef BOOL (WINAPI *_EnumDisplayMonitors_proto)(HDC, LPCRECT, MONITORENUMPROC, LPARAM);
static rfb::win32::DynamicFn<_EnumDisplayMonitors_proto> _EnumDisplayMonitors(_T("user32.dll"), "EnumDisplayMonitors");
static void fillMonitorInfo(HMONITOR monitor, MonitorInfo* mi) {
vlog.debug("monitor=%lx", monitor);
if (!_GetMonitorInfo.isValid())
throw rdr::Exception("no GetMonitorInfo");
memset(mi, 0, sizeof(MONITORINFOEXA));
mi->cbSize = sizeof(MONITORINFOEXA);
if (!(*_GetMonitorInfo)(monitor, mi))
throw rdr::SystemException("failed to GetMonitorInfo", GetLastError());
vlog.debug("monitor is %d,%d-%d,%d", mi->rcMonitor.left, mi->rcMonitor.top, mi->rcMonitor.right, mi->rcMonitor.bottom);
vlog.debug("work area is %d,%d-%d,%d", mi->rcWork.left, mi->rcWork.top, mi->rcWork.right, mi->rcWork.bottom);
vlog.debug("device is \"%s\"", mi->szDevice);
}
#else
#pragma message(" NOTE: Not building Multi-Monitor support.")
#endif
MonitorInfo::MonitorInfo(HWND window) {
cbSize = sizeof(MonitorInfo);
szDevice[0] = 0;
#ifdef RFB_HAVE_MONITORINFO
try {
if (_MonitorFromWindow.isValid()) {
HMONITOR monitor = (*_MonitorFromWindow)(window, MONITOR_DEFAULTTONEAREST);
if (!monitor)
throw rdr::SystemException("failed to get monitor", GetLastError());
fillMonitorInfo(monitor, this);
return;
}
} catch (rdr::Exception& e) {
vlog.error(e.str());
}
#endif
// Legacy fallbacks - just return the desktop settings
vlog.debug("using legacy fall-backs");
HWND desktop = GetDesktopWindow();
GetWindowRect(desktop, &rcMonitor);
SystemParametersInfo(SPI_GETWORKAREA, 0, &rcWork, 0);
dwFlags = 0;
}
MonitorInfo::MonitorInfo(const RECT& r) {
cbSize = sizeof(MonitorInfo);
szDevice[0] = 0;
#ifdef RFB_HAVE_MONITORINFO
try {
if (_MonitorFromRect.isValid()) {
HMONITOR monitor = (*_MonitorFromRect)(&r, MONITOR_DEFAULTTONEAREST);
if (!monitor)
throw rdr::SystemException("failed to get monitor", GetLastError());
fillMonitorInfo(monitor, this);
return;
}
} catch (rdr::Exception& e) {
vlog.error(e.str());
}
#endif
// Legacy fallbacks - just return the desktop settings
vlog.debug("using legacy fall-backs");
HWND desktop = GetDesktopWindow();
GetWindowRect(desktop, &rcMonitor);
SystemParametersInfo(SPI_GETWORKAREA, 0, &rcWork, 0);
dwFlags = 0;
}
#ifdef RFB_HAVE_MONITORINFO
struct monitorByNameData {
MonitorInfo* info;
const char* monitorName;
};
static BOOL CALLBACK monitorByNameEnumProc(HMONITOR monitor,
HDC dc,
LPRECT pos,
LPARAM d) {
monitorByNameData* data = (monitorByNameData*)d;
memset(data->info, 0, sizeof(MONITORINFOEXA));
data->info->cbSize = sizeof(MONITORINFOEXA);
if ((*_GetMonitorInfo)(monitor, data->info)) {
if (stricmp(data->monitorName, data->info->szDevice) == 0)
return FALSE;
}
return TRUE;
}
#endif
MonitorInfo::MonitorInfo(const char* devName) {
#ifdef RFB_HAVE_MONITORINFO
if (!_EnumDisplayMonitors.isValid()) {
vlog.debug("EnumDisplayMonitors not found");
} else {
monitorByNameData data;
data.info = this;
data.monitorName = devName;
(*_EnumDisplayMonitors)(0, 0, &monitorByNameEnumProc, (LPARAM)&data);
if (stricmp(data.monitorName, szDevice) == 0)
return;
}
#endif
// If multi-monitor is not built, or not supported by the OS,
// or if the named monitor is not found, revert to the primary monitor.
vlog.debug("reverting to primary monitor");
cbSize = sizeof(MonitorInfo);
szDevice[0] = 0;
HWND desktop = GetDesktopWindow();
GetWindowRect(desktop, &rcMonitor);
SystemParametersInfo(SPI_GETWORKAREA, 0, &rcWork, 0);
dwFlags = 0;
}
void MonitorInfo::moveTo(HWND handle) {
vlog.debug("moveTo monitor=%s", szDevice);
#ifdef RFB_HAVE_MONITORINFO
MonitorInfo mi(handle);
if (strcmp(szDevice, mi.szDevice) != 0) {
centerWindow(handle, rcWork);
clipTo(handle);
}
#endif
}
void MonitorInfo::clipTo(RECT* r) {
vlog.debug("clipTo monitor=%s", szDevice);
if (r->top < rcWork.top) {
r->bottom += rcWork.top - r->top; r->top = rcWork.top;
}
if (r->left < rcWork.left) {
r->right += rcWork.left - r->left; r->left = rcWork.left;
}
if (r->bottom > rcWork.bottom) {
r->top += rcWork.bottom - r->bottom; r->bottom = rcWork.bottom;
}
if (r->right > rcWork.right) {
r->left += rcWork.right - r->right; r->right = rcWork.right;
}
r->left = max(r->left, rcWork.left);
r->right = min(r->right, rcWork.right);
r->top = max(r->top, rcWork.top);
r->bottom = min(r->bottom, rcWork.bottom);
}
void MonitorInfo::clipTo(HWND handle) {
RECT r;
GetWindowRect(handle, &r);
clipTo(&r);
SetWindowPos(handle, 0, r.left, r.top, r.right-r.left, r.bottom-r.top,
SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOOWNERZORDER);
}
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