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
  10 #include "conky.h"
  11
  12 #ifdef X11
  13 #include <X11/Xlib.h>
  14 #include <X11/Xatom.h>
  15 #include <X11/Xutil.h>
  16 #ifdef XFT
  17 #include <X11/Xft/Xft.h>
  18 #endif
  19
  20 #include <stdio.h>
  21
  22 #ifdef XDBE
  23 int use_xdbe;
  24 #endif
  25
  26 #ifdef XFT
  27 int use_xft = 0;
  28 #endif
  29
  30 #define WINDOW_NAME_FMT "%s - conky"
  31
  32 /* some basic X11 stuff */
  33 Display *display;
  34 int display_width;
  35 int display_height;
  36 int screen;
  37 static int set_transparent;
  38 static int background_colour;
  39
  40 /* workarea from _NET_WORKAREA, this is where window / text is aligned */
  41 int workarea[4];
  42
  43 /* Window stuff */
  44 struct conky_window window;
  45
  46 /* local prototypes */
  47 static void update_workarea();
  48 static Window find_window_to_draw();
  49 static Window find_subwindow(Window win, int w, int h);
  50
  51 /* X11 initializer */
  52 void init_X11()
  53 {
  54         if ((display = XOpenDisplay(0)) == NULL)
  55                 CRIT_ERR("can't open display: %s", XDisplayName(0));
  56
  57         screen = DefaultScreen(display);
  58         display_width = DisplayWidth(display, screen);
  59         display_height = DisplayHeight(display, screen);
  60
  61         update_workarea();
  62 }
  63
  64 static void update_workarea()
  65 {
  66         Window root = RootWindow(display, screen);
  67         unsigned long nitems, bytes;
  68         unsigned char *buf = NULL;
  69         Atom type;
  70         int format;
  71
  72         /* default work area is display */
  73         workarea[0] = 0;
  74         workarea[1] = 0;
  75         workarea[2] = display_width;
  76         workarea[3] = display_height;
  77
  78         /* get current desktop */
  79         if (XGetWindowProperty(display, root, ATOM(_NET_CURRENT_DESKTOP),
  80                                0, 1, False, XA_CARDINAL, &type, &format,
  81                                &nitems, &bytes, &buf) == Success
  82             && type == XA_CARDINAL && nitems > 0) {
  83
  84                 //Currently unused
  85                 /*  long desktop = * (long *) buf; */
  86
  87                 XFree(buf);
  88                 buf = 0;
  89
  90         }
  91
  92         if (buf) {
  93                 XFree(buf);
  94                 buf = 0;
  95         }
  96 }
  97
  98 static Window find_window_to_draw()
  99 {
 100         Atom type;
 101         int format, i;
 102         unsigned long nitems, bytes;
 103         unsigned int n;
 104         Window root = RootWindow(display, screen);
 105         Window win = root;
 106         Window troot, parent, *children;
 107         unsigned char *buf = NULL;
 108
 109         /* some window managers set __SWM_VROOT to some child of root window */
 110
 111         XQueryTree(display, root, &troot, &parent, &children, &n);
 112         for (i = 0; i < (int) n; i++) {
 113                 if (XGetWindowProperty
 114                     (display, children[i], ATOM(__SWM_VROOT), 0, 1, False,
 115                      XA_WINDOW, &type, &format, &nitems, &bytes,
 116                      &buf) == Success && type == XA_WINDOW) {
 117                         win = *(Window *) buf;
 118                         XFree(buf);
 119                         XFree(children);
 120                         fprintf(stderr,
 121                                 "Conky: drawing to window from __SWM_VROOT property\n");
 122                         return win;
 123                 }
 124
 125                 if (buf) {
 126                         XFree(buf);
 127                         buf = 0;
 128                 }
 129         }
 130         XFree(children);
 131
 132         /* get subwindows from root */
 133         win = find_subwindow(root, -1, -1);
 134
 135         update_workarea();
 136
 137         win = find_subwindow(win, workarea[2], workarea[3]);
 138
 139         if (buf) {
 140                 XFree(buf);
 141                 buf = 0;
 142         }
 143
 144         if (win != root)
 145                 fprintf(stderr,
 146                         "Conky: drawing to subwindow of root window (%lx)\n",
 147                         win);
 148         else
 149                 fprintf(stderr, "Conky: drawing to root window\n");
 150
 151         return win;
 152 }
 153
 154 /* sets background to ParentRelative for the Window and all parents */
 155 inline void set_transparent_background(Window win)
 156 {
 157         static int colour_set = -1;
 158         if (set_transparent) {
 159                 Window parent = win;
 160                 unsigned int i;
 161                 for (i = 0; i < 50 && parent != RootWindow(display, screen); i++) {
 162                         Window r, *children;
 163                         unsigned int n;
 164
 165                         XSetWindowBackgroundPixmap(display, parent, ParentRelative);
 166
 167                         XQueryTree(display, parent, &r, &parent, &children, &n);
 168                         XFree(children);
 169                         }
 170         } else if (colour_set != background_colour) {
 171                 XSetWindowBackground(display, win, background_colour);
 172                 colour_set = background_colour;
 173 }
 174         //XClearWindow(display, win); not sure why this was here
 175 }
 176
 177 #if defined OWN_WINDOW
 178 void init_window(int own_window, char* wm_class_name, int w, int h, int l, int fixed_pos, int set_trans, int back_colour, char * nodename)
 179 #else
 180 void init_window(int own_window, int w, int h, int l, int set_trans, int back_colour, char * nodename)
 181 #endif
 182 {
 183         /* There seems to be some problems with setting transparent background (on
 184          * fluxbox this time). It doesn't happen always and I don't know why it
 185          * happens but I bet the bug is somewhere here. */
 186         set_transparent = set_trans;
 187         background_colour = back_colour;
 188         char * window_name = NULL;
 189         int num_chars = 0;
 190 #ifdef OWN_WINDOW
 191         if (own_window) {
 192
 193                 /* looks like root pixmap isn't needed for anything */
 194                 {
 195                         XSetWindowAttributes attrs;
 196                         XClassHint class_hints;
 197
 198                         /* just test color
 199                         attrs.background_pixel = get_x11_color("green");
 200                         */
 201
 202                         window.window = XCreateWindow(display, RootWindow(display, screen), window.x, window.y, w, h, 0, CopyFromParent,        /* depth */
 203                                                       CopyFromParent,   /* class */
 204                                                       CopyFromParent,   /* visual */
 205                                                       CWBackPixel, &attrs);
 206 /*                      XWMHints wmhints;
 207
 208                         this doesn't work properly
 209
 210                         wmhints.flags = StateHint;
 211                         wmhints.initial_state = WithdrawnState;
 212                         XSetWMHints(display, window.window, &wmhints);*/
 213
 214
 215
 216                         class_hints.res_class = wm_class_name;
 217                         class_hints.res_name = wm_class_name;
 218                         XSetClassHint(display, window.window,
 219                                       &class_hints);
 220
 221                         /*set_transparent_background(window.window);*/
 222                         window_name = (char *) malloc(strlen(WINDOW_NAME_FMT) + strlen(nodename)+1);
 223                         sprintf(window_name, WINDOW_NAME_FMT, nodename);
 224                         XStoreName(display, window.window, window_name);
 225                         free(window_name);
 226                         XClearWindow(display, window.window);
 227
 228                         if (!fixed_pos)
 229                                 XMoveWindow(display, window.window, window.x,
 230                         window.y);
 231                 }
 232
 233                 {
 234                         /* turn off decorations */
 235                         Atom a =
 236                             XInternAtom(display, "_MOTIF_WM_HINTS", True);
 237                         if (a != None) {
 238                                 long prop[5] = { 2, 0, 0, 0, 0 };
 239                                 XChangeProperty(display, window.window, a,
 240                                                 a, 32, PropModeReplace,
 241                                                 (unsigned char *) prop, 5);
 242                         }
 243
 244                         /* set window sticky (to all desktops) */
 245                         a = XInternAtom(display, "_NET_WM_DESKTOP", True);
 246                         if (a != None) {
 247                                 long prop = 0xFFFFFFFF;
 248                                 XChangeProperty(display, window.window, a,
 249                                                 XA_CARDINAL, 32,
 250                                                 PropModeReplace,
 251                                                 (unsigned char *) &prop,
 252                                                 1);
 253                         }
 254                         if(l) {
 255                         /* make sure the layer is on the bottom */
 256          a = XInternAtom(display, "_WIN_LAYER", True);
 257          if (a != None) {
 258             long prop = 0;
 259             XChangeProperty(display, window.window, a,
 260             XA_CARDINAL, 32,
 261             PropModeReplace,
 262             (unsigned char *) &prop, 1);
 263          }
 264                         }
 265                 }
 266
 267                 XMapWindow(display, window.window);
 268         } else
 269 #endif
 270                 /* root / desktop window */
 271         {
 272                 XWindowAttributes attrs;
 273
 274                 if (!window.window)
 275                         window.window = find_window_to_draw();
 276
 277                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 278                         window.width = attrs.width;
 279                         window.height = attrs.height;
 280                 }
 281         }
 282
 283         /* Drawable is same as window. This may be changed by double buffering. */
 284         window.drawable = window.window;
 285
 286 #ifdef XDBE
 287         if (use_xdbe) {
 288                 int major, minor;
 289                 if (!XdbeQueryExtension(display, &major, &minor)) {
 290                         use_xdbe = 0;
 291                 } else {
 292                         window.back_buffer =
 293                             XdbeAllocateBackBufferName(display,
 294                                                        window.window,
 295                                                        XdbeBackground);
 296                         if (window.back_buffer != None) {
 297                                 window.drawable = window.back_buffer;
 298                                 fprintf(stderr,
 299                                         "Conky: drawing to double buffer\n");
 300                         } else
 301                                 use_xdbe = 0;
 302                 }
 303                 if (!use_xdbe)
 304                         ERR("failed to set up double buffer");
 305         }
 306         if (!use_xdbe)
 307                 fprintf(stderr, "Conky: drawing to single buffer\n");
 308 #endif
 309
 310         XFlush(display);
 311
 312         /*set_transparent_background(window.window); must be done after double buffer stuff? */
 313 #ifdef OWN_WINDOW
 314         /*if (own_window) {
 315         set_transparent_background(window.window);
 316                 XClearWindow(display, window.window);
 317 }*/
 318 #endif
 319
 320         XSelectInput(display, window.window, ExposureMask
 321 #ifdef OWN_WINDOW
 322                      | (own_window
 323                         ? (StructureNotifyMask | PropertyChangeMask) : 0)
 324 #endif
 325             );
 326 }
 327
 328 static Window find_subwindow(Window win, int w, int h)
 329 {
 330         unsigned int i, j;
 331         Window troot, parent, *children;
 332         unsigned int n;
 333
 334         /* search subwindows with same size as display or work area */
 335
 336         for (i = 0; i < 10; i++) {
 337                 XQueryTree(display, win, &troot, &parent, &children, &n);
 338
 339                 for (j = 0; j < n; j++) {
 340                         XWindowAttributes attrs;
 341
 342                         if (XGetWindowAttributes
 343                             (display, children[j], &attrs)) {
 344                                 /* Window must be mapped and same size as display or work space */
 345                                 if (attrs.map_state != 0 &&
 346                                     ((attrs.width == display_width
 347                                       && attrs.height == display_height)
 348                                      || (attrs.width == w
 349                                          && attrs.height == h))) {
 350                                         win = children[j];
 351                                         break;
 352                                 }
 353                         }
 354                 }
 355
 356                 XFree(children);
 357                 if (j == n)
 358                         break;
 359         }
 360
 361         return win;
 362 }
 363
 364 long get_x11_color(const char *name)
 365 {
 366         XColor color;
 367         color.pixel = 0;
 368         if (!XParseColor
 369             (display, DefaultColormap(display, screen), name, &color)) {
 370                 ERR("can't parse X color '%s'", name);
 371                 return 0xFF00FF;
 372         }
 373         if (!XAllocColor
 374             (display, DefaultColormap(display, screen), &color))
 375                 ERR("can't allocate X color '%s'", name);
 376
 377         return (long) color.pixel;
 378 }
 379
 380 void create_gc()
 381 {
 382         XGCValues values;
 383         values.graphics_exposures = 0;
 384         values.function = GXcopy;
 385         window.gc = XCreateGC(display, window.drawable,
 386                               GCFunction | GCGraphicsExposures, &values);
 387 }
 388
 389 #endif /* X11 */