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

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