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

   1 // -*- mode: C; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   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 struct OtkDisplay *OBDisplay = NULL;
  37
  38 void OtkDisplay_Initialize(char *name)
  39 {
  40   OtkDisplay* self;
  41   PyObject *disp_env;
  42   XModifierKeymap *modmap;
  43   unsigned int NumLockMask = 0, ScrollLockMask = 0;
  44   size_t cnt;
  45   int i;
  46   int junk;
  47   (void) junk;
  48
  49   self = PyObject_New(OtkDisplay, &OtkDisplay_Type);
  50
  51   // Open the X display
  52   if (!(self->display = XOpenDisplay(name))) {
  53     printf(_("Unable to open connection to the X server. Please set the \n\
  54 DISPLAY environment variable approriately, or use the '-display' command \n\
  55 line argument.\n\n"));
  56     exit(1);
  57   }
  58   if (fcntl(ConnectionNumber(self->display), F_SETFD, 1) == -1) {
  59     printf(_("Couldn't mark display connection as close-on-exec.\n\n"));
  60     exit(1);
  61   }
  62
  63   XSetErrorHandler(xerrorHandler);
  64
  65   // set the DISPLAY environment variable for any lauched children, to the
  66   // display we're using, so they open in the right place.
  67   disp_env = PyString_FromFormat("DISPLAY=%s", DisplayString(self->display));
  68   if (putenv(PyString_AsString(disp_env))) {
  69     printf(_("warning: couldn't set environment variable 'DISPLAY'\n"));
  70     perror("putenv()");
  71   }
  72   Py_DECREF(disp_env);
  73
  74   // find the availability of X extensions we like to use
  75 #ifdef SHAPE
  76   self->shape = XShapeQueryExtension(self->display,
  77                                      &self->shape_event_basep, &junk);
  78 #endif
  79
  80 #ifdef XINERAMA
  81   self->xinerama = XineramaQueryExtension(self->display,
  82                                           &self->xinerama_event_basep, &junk);
  83 #endif // XINERAMA
  84
  85   // get lock masks that are defined by the display (not constant)
  86   modmap = XGetModifierMapping(self->display);
  87   if (modmap && modmap->max_keypermod > 0) {
  88     const int mask_table[] = {
  89       ShiftMask, LockMask, ControlMask, Mod1Mask,
  90       Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask
  91     };
  92     const size_t size = (sizeof(mask_table) / sizeof(mask_table[0])) *
  93       modmap->max_keypermod;
  94     // get the values of the keyboard lock modifiers
  95     // Note: Caps lock is not retrieved the same way as Scroll and Num lock
  96     // since it doesn't need to be.
  97     const KeyCode num_lock = XKeysymToKeycode(self->display, XK_Num_Lock);
  98     const KeyCode scroll_lock = XKeysymToKeycode(self->display,
  99                                                  XK_Scroll_Lock);
 100
 101     for (cnt = 0; cnt < size; ++cnt) {
 102       if (! modmap->modifiermap[cnt]) continue;
 103
 104       if (num_lock == modmap->modifiermap[cnt])
 105         NumLockMask = mask_table[cnt / modmap->max_keypermod];
 106       if (scroll_lock == modmap->modifiermap[cnt])
 107         ScrollLockMask = mask_table[cnt / modmap->max_keypermod];
 108     }
 109   }
 110
 111   if (modmap) XFreeModifiermap(modmap);
 112
 113   self->mask_list[0] = 0;
 114   self->mask_list[1] = LockMask;
 115   self->mask_list[2] = NumLockMask;
 116   self->mask_list[3] = LockMask | NumLockMask;
 117   self->mask_list[4] = ScrollLockMask;
 118   self->mask_list[5] = ScrollLockMask | LockMask;
 119   self->mask_list[6] = ScrollLockMask | NumLockMask;
 120   self->mask_list[7] = ScrollLockMask | LockMask | NumLockMask;
 121
 122   // set the global var, for the new screeninfo's
 123   OBDisplay = self;
 124
 125   // Get information on all the screens which are available.
 126   self->screenInfoList = (PyListObject*)PyList_New(ScreenCount(self->display));
 127   for (i = 0; i < ScreenCount(self->display); ++i)
 128     PyList_SetItem((PyObject*)self->screenInfoList, i, OtkScreenInfo_New(i));
 129
 130   Py_INCREF(OBDisplay); // make sure it stays around!!
 131 }
 132
 133 void OtkDisplay_Grab(OtkDisplay *self)
 134 {
 135   assert(self);
 136   if (self->grab_count == 0)
 137     XGrabServer(self->display);
 138   self->grab_count++;
 139 }
 140
 141 void OtkDisplay_Ungrab(OtkDisplay *self)
 142 {
 143   if (self->grab_count == 0) return;
 144   self->grab_count--;
 145   if (self->grab_count == 0)
 146     XUngrabServer(self->display);
 147 }
 148
 149 OtkScreenInfo *OtkDisplay_ScreenInfo(OtkDisplay *self, int num)
 150 {
 151   assert(num >= 0);
 152   return (OtkScreenInfo*)PyList_GetItem((PyObject*)self->screenInfoList, num);
 153 }
 154
 155
 156 static PyObject *otkdisplay_grab(OtkDisplay* self, PyObject* args)
 157 {
 158   if (!PyArg_ParseTuple(args, ":grab"))
 159     return NULL;
 160   OtkDisplay_Grab(self);
 161   return Py_None;
 162 }
 163
 164 static PyObject *otkdisplay_ungrab(OtkDisplay* self, PyObject* args)
 165 {
 166   if (!PyArg_ParseTuple(args, ":ungrab"))
 167     return NULL;
 168   OtkDisplay_Ungrab(self);
 169   return Py_None;
 170 }
 171
 172 static PyMethodDef get_methods[] = {
 173   {"grab", (PyCFunction)otkdisplay_grab, METH_VARARGS,
 174    "Grab the X display."},
 175   {"ungrab", (PyCFunction)otkdisplay_ungrab, METH_VARARGS,
 176    "Ungrab/Release the X display."},
 177   {NULL, NULL, 0, NULL}
 178 };
 179
 180
 181
 182 static void otkdisplay_dealloc(PyObject* self)
 183 {
 184   XCloseDisplay(((OtkDisplay*) self)->display);
 185   Py_DECREF(((OtkDisplay*) self)->screenInfoList);
 186   PyObject_Del(self);
 187 }
 188
 189 static PyObject *otkdisplay_getattr(PyObject *obj, char *name)
 190 {
 191   return Py_FindMethod(get_methods, obj, name);
 192 }
 193
 194
 195 PyTypeObject OtkDisplay_Type = {
 196   PyObject_HEAD_INIT(NULL)
 197   0,
 198   "OtkDisplay",
 199   sizeof(OtkDisplay),
 200   0,
 201   otkdisplay_dealloc, /*tp_dealloc*/
 202   0,          /*tp_print*/
 203   otkdisplay_getattr, /*tp_getattr*/
 204   0,          /*tp_setattr*/
 205   0,          /*tp_compare*/
 206   0,          /*tp_repr*/
 207   0,          /*tp_as_number*/
 208   0,          /*tp_as_sequence*/
 209   0,          /*tp_as_mapping*/
 210   0,          /*tp_hash */
 211 };
 212
 213
 214 static int xerrorHandler(Display *d, XErrorEvent *e)
 215 {
 216 #ifdef DEBUG
 217   char errtxt[128];
 218
 219   //if (e->error_code != BadWindow)
 220   {
 221     XGetErrorText(d, e->error_code, errtxt, 128);
 222     printf("X Error: %s\n", errtxt);
 223   }
 224 #else
 225   (void)d;
 226   (void)e;
 227 #endif
 228
 229   return False;
 230 }