Dogcows Code - chaz/openbox/blob - otk_c/display.c

   1 // -*- mode: C; indent-tabs-mode: nil; -*-
   2
   3 #include "../config.h"
   4 #include "display.h"
   5 #include "screeninfo.h"
   6
   7 #include <X11/keysym.h>
   8
   9 #ifdef    SHAPE
  10 #include <X11/extensions/shape.h>
  11 #endif // SHAPE
  12
  13 #ifdef    HAVE_STDIO_H
  14 #  include <stdio.h>
  15 #endif // HAVE_STDIO_H
  16
  17 #ifdef    HAVE_STDLIB_H
  18 #  include <stdlib.h>
  19 #endif // HAVE_STDLIB_H
  20
  21 #ifdef    HAVE_FCNTL_H
  22 #  include <fcntl.h>
  23 #endif // HAVE_FCNTL_H
  24
  25 #ifdef    HAVE_UNISTD_H
  26 #  include <sys/types.h>
  27 #  include <unistd.h>
  28 #endif // HAVE_UNISTD_H
  29
  30 #include "../src/gettext.h"
  31
  32 extern PyTypeObject OtkDisplay_Type;
  33
  34 static int xerrorHandler(Display *d, XErrorEvent *e);
  35
  36 PyObject *OtkDisplay_New(char *name)
  37 {
  38   OtkDisplay* self;
  39   PyObject *disp_env;
  40   XModifierKeymap *modmap;
  41   unsigned int NumLockMask = 0, ScrollLockMask = 0;
  42   size_t cnt;
  43   int i;
  44   int junk;
  45   (void) junk;
  46
  47   self = PyObject_New(OtkDisplay, &OtkDisplay_Type);
  48
  49   // Open the X display
  50   if (!(self->display = XOpenDisplay(name))) {
  51     printf(_("Unable to open connection to the X server. Please set the \n\
  52 DISPLAY environment variable approriately, or use the '-display' command \n\
  53 line argument.\n\n"));
  54     exit(1);
  55   }
  56   if (fcntl(ConnectionNumber(self->display), F_SETFD, 1) == -1) {
  57     printf(_("Couldn't mark display connection as close-on-exec.\n\n"));
  58     exit(1);
  59   }
  60
  61   XSetErrorHandler(xerrorHandler);
  62
  63   // set the DISPLAY environment variable for any lauched children, to the
  64   // display we're using, so they open in the right place.
  65   disp_env = PyString_FromFormat("DISPLAY=%s", DisplayString(self->display));
  66   if (putenv(PyString_AsString(disp_env))) {
  67     printf(_("warning: couldn't set environment variable 'DISPLAY'\n"));
  68     perror("putenv()");
  69   }
  70   Py_DECREF(disp_env);
  71
  72   // find the availability of X extensions we like to use
  73 #ifdef SHAPE
  74   self->shape = XShapeQueryExtension(self->display,
  75                                      &self->shape_event_basep, &junk);
  76 #endif
  77
  78 #ifdef XINERAMA
  79   self->xinerama = XineramaQueryExtension(self->display,
  80                                           &self->xinerama_event_basep, &junk);
  81 #endif // XINERAMA
  82
  83   // get lock masks that are defined by the display (not constant)
  84   modmap = XGetModifierMapping(self->display);
  85   if (modmap && modmap->max_keypermod > 0) {
  86     const int mask_table[] = {
  87       ShiftMask, LockMask, ControlMask, Mod1Mask,
  88       Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask
  89     };
  90     const size_t size = (sizeof(mask_table) / sizeof(mask_table[0])) *
  91       modmap->max_keypermod;
  92     // get the values of the keyboard lock modifiers
  93     // Note: Caps lock is not retrieved the same way as Scroll and Num lock
  94     // since it doesn't need to be.
  95     const KeyCode num_lock = XKeysymToKeycode(self->display, XK_Num_Lock);
  96     const KeyCode scroll_lock = XKeysymToKeycode(self->display,
  97                                                  XK_Scroll_Lock);
  98
  99     for (cnt = 0; cnt < size; ++cnt) {
 100       if (! modmap->modifiermap[cnt]) continue;
 101
 102       if (num_lock == modmap->modifiermap[cnt])
 103         NumLockMask = mask_table[cnt / modmap->max_keypermod];
 104       if (scroll_lock == modmap->modifiermap[cnt])
 105         ScrollLockMask = mask_table[cnt / modmap->max_keypermod];
 106     }
 107   }
 108
 109   if (modmap) XFreeModifiermap(modmap);
 110
 111   self->mask_list[0] = 0;
 112   self->mask_list[1] = LockMask;
 113   self->mask_list[2] = NumLockMask;
 114   self->mask_list[3] = LockMask | NumLockMask;
 115   self->mask_list[4] = ScrollLockMask;
 116   self->mask_list[5] = ScrollLockMask | LockMask;
 117   self->mask_list[6] = ScrollLockMask | NumLockMask;
 118   self->mask_list[7] = ScrollLockMask | LockMask | NumLockMask;
 119
 120   // Get information on all the screens which are available.
 121   self->screenInfoList = PyList_New(ScreenCount(self->display));
 122   for (i = 0; i < ScreenCount(self->display); ++i)
 123     PyList_SetItem(self->screenInfoList, i, OtkScreenInfo_New(i));
 124
 125   self->gccache = OtkGCCache_New(PyList_Size(self->screenInfoList));
 126
 127   return (PyObject*)self;
 128 }
 129
 130 void OtkDisplay_Grab(OtkDisplay *self)
 131 {
 132   assert(self);
 133   if (self->grab_count == 0)
 134     XGrabServer(self->display);
 135   self->grab_count++;
 136 }
 137
 138 void OtkDisplay_Ungrab(OtkDisplay *self)
 139 {
 140   if (self->grab_count == 0) return;
 141   self->grab_count--;
 142   if (self->grab_count == 0)
 143     XUngrabServer(self->display);
 144 }
 145
 146
 147
 148 static PyObject *otkdisplay_grab(OtkDisplay* self, PyObject* args)
 149 {
 150   if (!PyArg_ParseTuple(args, ":grab"))
 151     return NULL;
 152   OtkDisplay_Grab(self);
 153   return Py_None;
 154 }
 155
 156 static PyObject *otkdisplay_ungrab(OtkDisplay* self, PyObject* args)
 157 {
 158   if (!PyArg_ParseTuple(args, ":ungrab"))
 159     return NULL;
 160   OtkDisplay_Ungrab(self);
 161   return Py_None;
 162 }
 163
 164 static PyMethodDef get_methods[] = {
 165   {"grab", (PyCFunction)otkdisplay_grab, METH_VARARGS,
 166    "Grab the X display."},
 167   {"ungrab", (PyCFunction)otkdisplay_ungrab, METH_VARARGS,
 168    "Ungrab/Release the X display."},
 169   {NULL, NULL, 0, NULL}
 170 };
 171
 172
 173
 174 static void otkdisplay_dealloc(PyObject* self)
 175 {
 176   XCloseDisplay(((OtkDisplay*) self)->display);
 177   PyObject_Del(((OtkDisplay*) self)->screenInfoList);
 178   PyObject_Del(self);
 179 }
 180
 181 static PyObject *otkdisplay_getattr(PyObject *obj, char *name)
 182 {
 183   return Py_FindMethod(get_methods, obj, name);
 184 }
 185
 186
 187 PyTypeObject OtkDisplay_Type = {
 188   PyObject_HEAD_INIT(NULL)
 189   0,
 190   "OtkDisplay",
 191   sizeof(OtkDisplay),
 192   0,
 193   otkdisplay_dealloc, /*tp_dealloc*/
 194   0,          /*tp_print*/
 195   otkdisplay_getattr, /*tp_getattr*/
 196   0,          /*tp_setattr*/
 197   0,          /*tp_compare*/
 198   0,          /*tp_repr*/
 199   0,          /*tp_as_number*/
 200   0,          /*tp_as_sequence*/
 201   0,          /*tp_as_mapping*/
 202   0,          /*tp_hash */
 203 };
 204
 205
 206 static int xerrorHandler(Display *d, XErrorEvent *e)
 207 {
 208 #ifdef DEBUG
 209   char errtxt[128];
 210
 211   //if (e->error_code != BadWindow)
 212   {
 213     XGetErrorText(d, e->error_code, errtxt, 128);
 214     printf("X Error: %s\n", errtxt);
 215   }
 216 #else
 217   (void)d;
 218   (void)e;
 219 #endif
 220
 221   return False;
 222 }