git.maemo.org Git - monky/blob - src/x11.c

   1 /*
   2  * Conky, a system monitor, based on torsmo
   3  *
   4  * This program is licensed under BSD license, read COPYING
   5  *
   6  *  $Id$
   7  */
   8
   9 #include "conky.h"
  10 #include <X11/Xlib.h>
  11 #include <X11/Xatom.h>
  12 #include <X11/Xutil.h>
  13 #ifdef XFT
  14 #include <X11/Xft/Xft.h>
  15 #endif
  16
  17 #ifdef XDBE
  18 int use_xdbe;
  19 #endif
  20
  21 #ifdef XFT
  22 int use_xft = 0;
  23 #endif
  24
  25 /* some basic X11 stuff */
  26 Display *display;
  27 int display_width;
  28 int display_height;
  29 int screen;
  30 static int set_transparent;
  31 static int background_colour;
  32
  33 /* workarea from _NET_WORKAREA, this is where window / text is aligned */
  34 int workarea[4];
  35
  36 /* Window stuff */
  37 struct conky_window window;
  38
  39 /* local prototypes */
  40 static void update_workarea();
  41 static Window find_window_to_draw();
  42 static Window find_subwindow(Window win, int w, int h);
  43
  44 /* X11 initializer */
  45 void init_X11()
  46 {
  47         if ((display = XOpenDisplay(0)) == NULL)
  48                 CRIT_ERR("can't open display: %s", XDisplayName(0));
  49
  50         screen = DefaultScreen(display);
  51         display_width = DisplayWidth(display, screen);
  52         display_height = DisplayHeight(display, screen);
  53
  54         update_workarea();
  55 }
  56
  57 static void update_workarea()
  58 {
  59         Window root = RootWindow(display, screen);
  60         unsigned long nitems, bytes;
  61         unsigned char *buf = NULL;
  62         Atom type;
  63         int format;
  64
  65         /* default work area is display */
  66         workarea[0] = 0;
  67         workarea[1] = 0;
  68         workarea[2] = display_width;
  69         workarea[3] = display_height;
  70
  71         /* get current desktop */
  72         if (XGetWindowProperty(display, root, ATOM(_NET_CURRENT_DESKTOP),
  73                                0, 1, False, XA_CARDINAL, &type, &format,
  74                                &nitems, &bytes, &buf) == Success
  75             && type == XA_CARDINAL && nitems > 0) {
  76
  77                 //Currently unused
  78                 /*  long desktop = * (long *) buf; */
  79
  80                 XFree(buf);
  81                 buf = 0;
  82
  83         }
  84
  85         if (buf) {
  86                 XFree(buf);
  87                 buf = 0;
  88         }
  89 }
  90
  91 static Window find_window_to_draw()
  92 {
  93         Atom type;
  94         int format, i;
  95         unsigned long nitems, bytes;
  96         unsigned int n;
  97         Window root = RootWindow(display, screen);
  98         Window win = root;
  99         Window troot, parent, *children;
 100         unsigned char *buf = NULL;
 101
 102         /* some window managers set __SWM_VROOT to some child of root window */
 103
 104         XQueryTree(display, root, &troot, &parent, &children, &n);
 105         for (i = 0; i < (int) n; i++) {
 106                 if (XGetWindowProperty
 107                     (display, children[i], ATOM(__SWM_VROOT), 0, 1, False,
 108                      XA_WINDOW, &type, &format, &nitems, &bytes,
 109                      &buf) == Success && type == XA_WINDOW) {
 110                         win = *(Window *) buf;
 111                         XFree(buf);
 112                         XFree(children);
 113                         fprintf(stderr,
 114                                 "Conky: drawing to window from __SWM_VROOT property\n");
 115                         return win;
 116                 }
 117
 118                 if (buf) {
 119                         XFree(buf);
 120                         buf = 0;
 121                 }
 122         }
 123         XFree(children);
 124
 125         /* get subwindows from root */
 126         win = find_subwindow(root, -1, -1);
 127
 128         update_workarea();
 129
 130         win = find_subwindow(win, workarea[2], workarea[3]);
 131
 132         if (buf) {
 133                 XFree(buf);
 134                 buf = 0;
 135         }
 136
 137         if (win != root)
 138                 fprintf(stderr,
 139                         "Conky: drawing to subwindow of root window (%lx)\n",
 140                         win);
 141         else
 142                 fprintf(stderr, "Conky: drawing to root window\n");
 143
 144         return win;
 145 }
 146
 147 /* sets background to ParentRelative for the Window and all parents */
 148 void set_transparent_background(Window win)
 149 {
 150         if (set_transparent) {
 151                 Window parent = win;
 152                 unsigned int i;
 153                 for (i = 0; i < 16 && parent != RootWindow(display, screen); i++) {
 154                         Window r, *children;
 155                         unsigned int n;
 156
 157                         XSetWindowBackgroundPixmap(display, parent, ParentRelative);
 158
 159                         XQueryTree(display, parent, &r, &parent, &children, &n);
 160                         XFree(children);
 161                 }
 162         } else {
 163                 XSetWindowBackground(display, win, background_colour);
 164         }
 165         XClearWindow(display, win);
 166 }
 167
 168 #if defined OWN_WINDOW
 169 void init_window(int own_window, int w, int h, int l, int fixed_pos, int set_trans, int back_colour)
 170 #else
 171 void init_window(int own_window, int w, int h, int l, int set_trans, int back_colour)
 172 #endif
 173 {
 174         /* There seems to be some problems with setting transparent background (on
 175          * fluxbox this time). It doesn't happen always and I don't know why it
 176          * happens but I bet the bug is somewhere here. */
 177         set_transparent = set_trans;
 178         background_colour = back_colour;
 179 #ifdef OWN_WINDOW
 180         if (own_window) {
 181
 182                 /* looks like root pixmap isn't needed for anything */
 183                 {
 184                         XSetWindowAttributes attrs;
 185                         XClassHint class_hints;
 186
 187                         /* just test color
 188                         attrs.background_pixel = get_x11_color("green");
 189                         */
 190
 191                         window.window = XCreateWindow(display, RootWindow(display, screen), window.x, window.y, w, h, 0, CopyFromParent,        /* depth */
 192                                                       CopyFromParent,   /* class */
 193                                                       CopyFromParent,   /* visual */
 194                                                       CWBackPixel, &attrs);
 195
 196                         class_hints.res_class = "conky";
 197                         class_hints.res_name = "conky";
 198                         XSetClassHint(display, window.window,
 199                                       &class_hints);
 200
 201                         set_transparent_background(window.window);
 202
 203                         XStoreName(display, window.window, "conky");
 204
 205                         XClearWindow(display, window.window);
 206
 207                         if (!fixed_pos)
 208                                 XMoveWindow(display, window.window, window.x,
 209                         window.y);
 210                 }
 211
 212                 {
 213                         /* turn off decorations */
 214                         Atom a =
 215                             XInternAtom(display, "_MOTIF_WM_HINTS", True);
 216                         if (a != None) {
 217                                 long prop[5] = { 2, 0, 0, 0, 0 };
 218                                 XChangeProperty(display, window.window, a,
 219                                                 a, 32, PropModeReplace,
 220                                                 (unsigned char *) prop, 5);
 221                         }
 222
 223                         /* set window sticky (to all desktops) */
 224                         a = XInternAtom(display, "_NET_WM_DESKTOP", True);
 225                         if (a != None) {
 226                                 long prop = 0xFFFFFFFF;
 227                                 XChangeProperty(display, window.window, a,
 228                                                 XA_CARDINAL, 32,
 229                                                 PropModeReplace,
 230                                                 (unsigned char *) &prop,
 231                                                 1);
 232                         }
 233                         if(l) {
 234                         /* make sure the layer is on the bottom */
 235          a = XInternAtom(display, "_WIN_LAYER", True);
 236          if (a != None) {
 237             long prop = 0;
 238             XChangeProperty(display, window.window, a,
 239             XA_CARDINAL, 32,
 240             PropModeReplace,
 241             (unsigned char *) &prop, 1);
 242          }
 243                         }
 244                 }
 245
 246                 XMapWindow(display, window.window);
 247         } else
 248 #endif
 249                 /* root / desktop window */
 250         {
 251                 XWindowAttributes attrs;
 252
 253                 if (!window.window)
 254                         window.window = find_window_to_draw();
 255
 256                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 257                         window.width = attrs.width;
 258                         window.height = attrs.height;
 259                 }
 260         }
 261
 262         /* Drawable is same as window. This may be changed by double buffering. */
 263         window.drawable = window.window;
 264
 265 #ifdef XDBE
 266         if (use_xdbe) {
 267                 int major, minor;
 268                 if (!XdbeQueryExtension(display, &major, &minor)) {
 269                         use_xdbe = 0;
 270                 } else {
 271                         window.back_buffer =
 272                             XdbeAllocateBackBufferName(display,
 273                                                        window.window,
 274                                                        XdbeBackground);
 275                         if (window.back_buffer != None) {
 276                                 window.drawable = window.back_buffer;
 277                                 fprintf(stderr,
 278                                         "Conky: drawing to double buffer\n");
 279                         } else
 280                                 use_xdbe = 0;
 281                 }
 282                 if (!use_xdbe)
 283                         ERR("failed to set up double buffer");
 284         }
 285         if (!use_xdbe)
 286                 fprintf(stderr, "Conky: drawing to single buffer\n");
 287 #endif
 288
 289         XFlush(display);
 290
 291         /*set_transparent_background(window.window); must be done after double buffer stuff? */
 292 #ifdef OWN_WINDOW
 293         if (own_window) {
 294                 set_transparent_background(window.window);
 295                 XClearWindow(display, window.window);
 296         }
 297 #endif
 298
 299         XSelectInput(display, window.window, ExposureMask
 300 #ifdef OWN_WINDOW
 301                      | (own_window
 302                         ? (StructureNotifyMask | PropertyChangeMask) : 0)
 303 #endif
 304             );
 305 }
 306
 307 static Window find_subwindow(Window win, int w, int h)
 308 {
 309         unsigned int i, j;
 310         Window troot, parent, *children;
 311         unsigned int n;
 312
 313         /* search subwindows with same size as display or work area */
 314
 315         for (i = 0; i < 10; i++) {
 316                 XQueryTree(display, win, &troot, &parent, &children, &n);
 317
 318                 for (j = 0; j < n; j++) {
 319                         XWindowAttributes attrs;
 320
 321                         if (XGetWindowAttributes
 322                             (display, children[j], &attrs)) {
 323                                 /* Window must be mapped and same size as display or work space */
 324                                 if (attrs.map_state != 0 &&
 325                                     ((attrs.width == display_width
 326                                       && attrs.height == display_height)
 327                                      || (attrs.width == w
 328                                          && attrs.height == h))) {
 329                                         win = children[j];
 330                                         break;
 331                                 }
 332                         }
 333                 }
 334
 335                 XFree(children);
 336                 if (j == n)
 337                         break;
 338         }
 339
 340         return win;
 341 }
 342
 343 long get_x11_color(const char *name)
 344 {
 345         XColor color;
 346         color.pixel = 0;
 347         if (!XParseColor
 348             (display, DefaultColormap(display, screen), name, &color)) {
 349                 ERR("can't parse X color '%s'", name);
 350                 return 0xFF00FF;
 351         }
 352         if (!XAllocColor
 353             (display, DefaultColormap(display, screen), &color))
 354                 ERR("can't allocate X color '%s'", name);
 355
 356         return (long) color.pixel;
 357 }
 358
 359 void create_gc()
 360 {
 361         XGCValues values;
 362         values.graphics_exposures = 0;
 363         values.function = GXcopy;
 364         window.gc = XCreateGC(display, window.drawable,
 365                               GCFunction | GCGraphicsExposures, &values);
 366 }