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