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 inline void set_transparent_background(Window win)
 149 {
 150         static int colour_set = -1;
 151         if (set_transparent) {
 152                 Window parent = win;
 153                 unsigned int i;
 154                 for (i = 0; i < 50 && parent != RootWindow(display, screen); i++) {
 155                         Window r, *children;
 156                         unsigned int n;
 157
 158                         XSetWindowBackgroundPixmap(display, parent, ParentRelative);
 159
 160                         XQueryTree(display, parent, &r, &parent, &children, &n);
 161                         XFree(children);
 162                         }
 163         } else if (colour_set != background_colour) {
 164                 XSetWindowBackground(display, win, background_colour);
 165                 colour_set = background_colour;
 166         }
 167         //XClearWindow(display, win); not sure why this was here
 168 }
 169
 170 #if defined OWN_WINDOW
 171 void init_window(int own_window, int w, int h, int l, int fixed_pos, int set_trans, int back_colour)
 172 #else
 173 void init_window(int own_window, int w, int h, int l, int set_trans, int back_colour)
 174 #endif
 175 {
 176         /* There seems to be some problems with setting transparent background (on
 177          * fluxbox this time). It doesn't happen always and I don't know why it
 178          * happens but I bet the bug is somewhere here. */
 179         set_transparent = set_trans;
 180         background_colour = back_colour;
 181 #ifdef OWN_WINDOW
 182         if (own_window) {
 183
 184                 /* looks like root pixmap isn't needed for anything */
 185                 {
 186                         XSetWindowAttributes attrs;
 187                         XClassHint class_hints;
 188
 189                         /* just test color
 190                         attrs.background_pixel = get_x11_color("green");
 191                         */
 192
 193                         window.window = XCreateWindow(display, RootWindow(display, screen), window.x, window.y, w, h, 0, CopyFromParent,        /* depth */
 194                                                       CopyFromParent,   /* class */
 195                                                       CopyFromParent,   /* visual */
 196                                                       CWBackPixel, &attrs);
 197
 198                         class_hints.res_class = "conky";
 199                         class_hints.res_name = "conky";
 200                         XSetClassHint(display, window.window,
 201                                       &class_hints);
 202
 203                         /*set_transparent_background(window.window);*/
 204
 205                         XStoreName(display, window.window, "conky");
 206
 207                         XClearWindow(display, window.window);
 208
 209                         if (!fixed_pos)
 210                                 XMoveWindow(display, window.window, window.x,
 211                         window.y);
 212                 }
 213
 214                 {
 215                         /* turn off decorations */
 216                         Atom a =
 217                             XInternAtom(display, "_MOTIF_WM_HINTS", True);
 218                         if (a != None) {
 219                                 long prop[5] = { 2, 0, 0, 0, 0 };
 220                                 XChangeProperty(display, window.window, a,
 221                                                 a, 32, PropModeReplace,
 222                                                 (unsigned char *) prop, 5);
 223                         }
 224
 225                         /* set window sticky (to all desktops) */
 226                         a = XInternAtom(display, "_NET_WM_DESKTOP", True);
 227                         if (a != None) {
 228                                 long prop = 0xFFFFFFFF;
 229                                 XChangeProperty(display, window.window, a,
 230                                                 XA_CARDINAL, 32,
 231                                                 PropModeReplace,
 232                                                 (unsigned char *) &prop,
 233                                                 1);
 234                         }
 235                         if(l) {
 236                         /* make sure the layer is on the bottom */
 237          a = XInternAtom(display, "_WIN_LAYER", True);
 238          if (a != None) {
 239             long prop = 0;
 240             XChangeProperty(display, window.window, a,
 241             XA_CARDINAL, 32,
 242             PropModeReplace,
 243             (unsigned char *) &prop, 1);
 244          }
 245                         }
 246                 }
 247
 248                 XMapWindow(display, window.window);
 249         } else
 250 #endif
 251                 /* root / desktop window */
 252         {
 253                 XWindowAttributes attrs;
 254
 255                 if (!window.window)
 256                         window.window = find_window_to_draw();
 257
 258                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 259                         window.width = attrs.width;
 260                         window.height = attrs.height;
 261                 }
 262         }
 263
 264         /* Drawable is same as window. This may be changed by double buffering. */
 265         window.drawable = window.window;
 266
 267 #ifdef XDBE
 268         if (use_xdbe) {
 269                 int major, minor;
 270                 if (!XdbeQueryExtension(display, &major, &minor)) {
 271                         use_xdbe = 0;
 272                 } else {
 273                         window.back_buffer =
 274                             XdbeAllocateBackBufferName(display,
 275                                                        window.window,
 276                                                        XdbeBackground);
 277                         if (window.back_buffer != None) {
 278                                 window.drawable = window.back_buffer;
 279                                 fprintf(stderr,
 280                                         "Conky: drawing to double buffer\n");
 281                         } else
 282                                 use_xdbe = 0;
 283                 }
 284                 if (!use_xdbe)
 285                         ERR("failed to set up double buffer");
 286         }
 287         if (!use_xdbe)
 288                 fprintf(stderr, "Conky: drawing to single buffer\n");
 289 #endif
 290
 291         XFlush(display);
 292
 293         /*set_transparent_background(window.window); must be done after double buffer stuff? */
 294 #ifdef OWN_WINDOW
 295         /*if (own_window) {
 296         set_transparent_background(window.window);
 297                 XClearWindow(display, window.window);
 298 }*/
 299 #endif
 300
 301         XSelectInput(display, window.window, ExposureMask
 302 #ifdef OWN_WINDOW
 303                      | (own_window
 304                         ? (StructureNotifyMask | PropertyChangeMask) : 0)
 305 #endif
 306             );
 307 }
 308
 309 static Window find_subwindow(Window win, int w, int h)
 310 {
 311         unsigned int i, j;
 312         Window troot, parent, *children;
 313         unsigned int n;
 314
 315         /* search subwindows with same size as display or work area */
 316
 317         for (i = 0; i < 10; i++) {
 318                 XQueryTree(display, win, &troot, &parent, &children, &n);
 319
 320                 for (j = 0; j < n; j++) {
 321                         XWindowAttributes attrs;
 322
 323                         if (XGetWindowAttributes
 324                             (display, children[j], &attrs)) {
 325                                 /* Window must be mapped and same size as display or work space */
 326                                 if (attrs.map_state != 0 &&
 327                                     ((attrs.width == display_width
 328                                       && attrs.height == display_height)
 329                                      || (attrs.width == w
 330                                          && attrs.height == h))) {
 331                                         win = children[j];
 332                                         break;
 333                                 }
 334                         }
 335                 }
 336
 337                 XFree(children);
 338                 if (j == n)
 339                         break;
 340         }
 341
 342         return win;
 343 }
 344
 345 long get_x11_color(const char *name)
 346 {
 347         XColor color;
 348         color.pixel = 0;
 349         if (!XParseColor
 350             (display, DefaultColormap(display, screen), name, &color)) {
 351                 ERR("can't parse X color '%s'", name);
 352                 return 0xFF00FF;
 353         }
 354         if (!XAllocColor
 355             (display, DefaultColormap(display, screen), &color))
 356                 ERR("can't allocate X color '%s'", name);
 357
 358         return (long) color.pixel;
 359 }
 360
 361 void create_gc()
 362 {
 363         XGCValues values;
 364         values.graphics_exposures = 0;
 365         values.function = GXcopy;
 366         window.gc = XCreateGC(display, window.drawable,
 367                               GCFunction | GCGraphicsExposures, &values);
 368 }