itgmania212121/stepmania/src/archutils/Unix/X11Helper.cpp

#include "global.h"
#include "X11Helper.h"

#include <vector>

#include <X11/Xlib.h>		// Display, Window

#include "RageLog.h"		// LOG
#include "RageDisplay.h"	// RageDisplay

vector<long>		pMasks;				// Currently open masks
Display			*pDpy		= NULL;		// Running X connection
bool			pHaveWin	= false;	// Do we have a window?
Window			pWin;				// Current window
unsigned short int	pCt		= 0;		// Number of subsystems
							// using the X connection

int protoErrorCallback(Display *d, XErrorEvent *err)
{
	char errText[32];
	XGetErrorText(d,  err->error_code, errText, 32);
	LOG->Warn("X11 Protocol error %s (%d) has occurred, caused by request %d,%d, resource ID %d",
		errText, err->error_code, err->request_code, err->minor_code, err->resourceid);

	return 0; // Xlib ignores our return value
}

bool X11Helper::Go()
{
	if(pCt == 0)
	{
		pDpy = XOpenDisplay(0);
		if(pDpy == NULL) { return false; }

		XSetErrorHandler(&protoErrorCallback);
	}
	pCt++;

	return true;
}

Display *X11Helper::Dpy()
{
	return pDpy;
}

Window& X11Helper::Win()
{
	return pWin;
}

static bool pApplyMasks()
{
	unsigned int i;
	long finalMask;

	i = 0;
	while(i < pMasks.size() )
	{
		finalMask |= pMasks[i];
		i++;
	}

	if(XSelectInput(pDpy, pWin, finalMask) == 0) { return false; }

	return true;
}

bool X11Helper::OpenMask(long mask)
{
	pMasks.push_back(mask);
	if(pHaveWin)
	{
		return pApplyMasks();
	}
	else
	{
		return true;
	}
}

bool X11Helper::CloseMask(long mask)
{
	vector<long>::iterator i;
	
	i = pMasks.begin();
	while(true)
	{
		if(*i == mask)
		{
			pMasks.erase(i);
			break;
		}
		if(i == pMasks.end() ) { return false; }
		i++;
	}

	if(pHaveWin)
	{
		return pApplyMasks();
	}
	else
	{
		return true;
	}
}

bool X11Helper::MakeWindow(int screenNum, int depth, Visual *visual, int width, int height)
{
	vector<long>::iterator i;
	
	if(pDpy == NULL) { return false; }

	if(pHaveWin) { XDestroyWindow(pDpy, pWin); pHaveWin = false; }

	XSetWindowAttributes winAttribs;

	winAttribs.border_pixel = 0;
	winAttribs.event_mask = 0;
	i = pMasks.begin();
	while(i != pMasks.end() )
	{
		winAttribs.event_mask |= *i;
		i++;
	}

	// XXX: Error catching/handling?

	winAttribs.colormap = XCreateColormap(pDpy, RootWindow(pDpy, screenNum),
							visual, AllocNone);

	pWin = XCreateWindow(pDpy, RootWindow(pDpy, screenNum), 0, 0, width,
		height, 0, depth, InputOutput, visual,
		CWBorderPixel | CWColormap | CWEventMask, &winAttribs);

	pHaveWin = true;

	return true;
}

void X11Helper::Stop()
{
	pCt--;

	if(pCt == 0)
	{
		XCloseDisplay(pDpy);
		pMasks.clear();
	}
}

/*
 * (c) 2005 Ben Anderson
 * All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, and/or sell copies of the Software, and to permit persons to
 * whom the Software is furnished to do so, provided that the above
 * copyright notice(s) and this permission notice appear in all copies of
 * the Software and that both the above copyright notice(s) and this
 * permission notice appear in supporting documentation.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
 * THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
 * INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
 * OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
 * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */