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- /* x11_display.c -- Initialisation for X11 window-system
- Copyright (C) 1993, 1994 John Harper <jsh@ukc.ac.uk>
-
- This file is part of Jade.
-
- Jade 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, or (at your option)
- any later version.
-
- Jade 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 Jade; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include "jade.h"
- #include "jade_protos.h"
-
- #include <X11/Xutil.h>
-
- #ifdef HAVE_UNIX
- # include <sys/types.h>
- # include <sys/time.h>
- # include <fcntl.h>
- #else
- you lose
- #endif
-
- _PR void sys_usage(void);
- _PR int initwinsys(int *, char ***);
- _PR void killwinsys(void);
-
- #ifdef HAVE_UNIX
- _PR fd_set FdReadSet;
- fd_set FdReadSet;
- _PR void (*FdReadAction[])(int);
- void (*FdReadAction[FD_SETSIZE])(int);
- #endif
-
- _PR Display *XDisplay;
- _PR int XScreen;
- _PR Colormap ColourMap;
- _PR u_long XForePixel, XBackPixel;
- _PR Atom Wm_Del_Win;
- _PR char **Argv;
- _PR int Argc;
-
- Display *XDisplay;
- int XScreen;
- Colormap XColourMap;
- u_long XForePixel, XBackPixel;
- Atom Wm_Del_Win;
- char **Argv;
- int Argc;
-
- static char *DisplayName = NULL;
- static char *BgStr = "white";
- static char *FgStr = "black";
- static char *GeomStr = "80x24";
- _PR VALUE DefFontStr;
- VALUE DefFontStr = MKSTR(DEFAULT_FONT);
- static char *ProgName;
-
- static int
- getxresources(void)
- {
- char *s;
- if((s = XGetDefault(XDisplay, ProgName, "geometry"))
- || (s = XGetDefault(XDisplay, "Jade", "geometry")))
- GeomStr = s;
- if((s = XGetDefault(XDisplay, ProgName, "foreground"))
- || (s = XGetDefault(XDisplay, "Jade", "foreground")))
- FgStr = s;
- if((s = XGetDefault(XDisplay, ProgName, "background"))
- || (s = XGetDefault(XDisplay, "Jade", "background")))
- BgStr = s;
- if((s = XGetDefault(XDisplay, ProgName, "font"))
- || (s = XGetDefault(XDisplay, "Jade", "font")))
- DefFontStr = valstrdup(s);
- return(TRUE);
- }
- void
- sys_usage(void)
- {
- fputs(
- "where SYSTEM-OPTIONS are,\n"
- " -display DISPLAY-NAME\n"
- " -name NAME\n"
- " -geometry WINDOW-GEOMETRY\n"
- " -fg FOREGROUND-COLOUR\n"
- " -bg BACKGROUND-COLOUR\n"
- " -font FONT-NAME\n"
- " -sync\n"
- , stderr);
- }
- static int
- getxoptions(int *argc_p, char ***argv_p)
- {
- int argc = *argc_p;
- char **argv = *argv_p;
- argc--;
- argv++;
- while((argc >= 1) && (**argv == '-'))
- {
- if(!strcmp("-sync", *argv))
- XSynchronize(XDisplay, True);
- else if(argc >= 2)
- {
- if(!strcmp("-display", *argv))
- ;
- else if(!strcmp("-name", *argv))
- ;
- else if(!strcmp("-geometry", *argv))
- GeomStr = argv[1];
- else if(!strcmp("-fg", *argv))
- FgStr = argv[1];
- else if(!strcmp("-bg", *argv))
- BgStr = argv[1];
- else if(!strcmp("-font", *argv))
- DefFontStr = valstrdup(argv[1]);
- else
- break;
- argc--; argv++;
- }
- else
- break;
- argc--; argv++;
- }
- *argc_p = argc;
- *argv_p = argv;
- return(TRUE);
- }
- static int
- usexoptions(void)
- {
- int x, y, w, h;
- int gflgs = XParseGeometry(GeomStr, &x, &y, &w, &h);
- XColor tmpc;
- if(gflgs & WidthValue)
- DefDims[2] = w;
- else
- DefDims[2] = -1;
- if(gflgs & HeightValue)
- DefDims[3] = h;
- else
- DefDims[3] = -1;
- /*
- * need to use -ve values properly
- */
- if(gflgs & XValue)
- DefDims[0] = x;
- else
- DefDims[0] = -1;
- if(gflgs & YValue)
- DefDims[1] = y;
- else
- DefDims[1] = -1;
- if(!XParseColor(XDisplay, XColourMap, FgStr, &tmpc))
- fprintf(stderr, "error: invalid fg colour\n");
- else if(!XAllocColor(XDisplay, XColourMap, &tmpc))
- fprintf(stderr, "error: can't allocate fg colour\n");
- else
- XForePixel = tmpc.pixel;
- if(!XParseColor(XDisplay, XColourMap, BgStr, &tmpc))
- fprintf(stderr, "error: invalid bg colour\n");
- else if(!XAllocColor(XDisplay, XColourMap, &tmpc))
- fprintf(stderr, "error: can't allocate bg colour\n");
- else
- XBackPixel = tmpc.pixel;
- return(TRUE);
- }
-
- int
- initwinsys(int *argc_p, char ***argv_p)
- {
- int i;
- Argv = *argv_p;
- Argc = *argc_p;
- ProgName = filepart(Argv[0]);
- for(i = 1; i < Argc; i++)
- {
- /* These options have to be found *before* resources are looked
- for. */
- if(!strcmp("-display", Argv[i]) && (i+1 < Argc))
- DisplayName = Argv[++i];
- else if(!strcmp("-name", Argv[i]) && (i+1 < Argc))
- ProgName = Argv[++i];
- }
- XDisplay = XOpenDisplay(DisplayName);
- if(XDisplay)
- {
- #ifdef HAVE_UNIX
- FD_ZERO(&FdReadSet);
- /*
- * close-on-exec = TRUE
- */
- fcntl(ConnectionNumber(XDisplay), F_SETFD, 1);
- FD_SET(ConnectionNumber(XDisplay), &FdReadSet);
- /*
- * Don't need to do this since the fact that the select() has returned
- * means that the input Q is re-checked...
- * ...although having thought about this it may be useful to do the
- * below stuff so all events are processed before reading output from
- * processes???
- * FdReadAction[ConnectionNumber(XDisplay)] = readnextevent;
- */
- #endif /* HAVE_UNIX */
-
- XScreen = DefaultScreen(XDisplay);
- XColourMap = DefaultColormap(XDisplay, XScreen);
- if(getxresources() && getxoptions(argc_p, argv_p) && usexoptions())
- {
- Wm_Del_Win = XInternAtom(XDisplay, "WM_DELETE_WINDOW", False);
- return(TRUE);
- }
- }
- else
- fprintf(stderr, "jade: can't open X connection\n");
- return(FALSE);
- }
- void
- killwinsys(void)
- {
- XCloseDisplay(XDisplay);
- }
-