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