vcs.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_desktop_window();
  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_desktop_window()
  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: desktop window (%lx) found from __SWM_VROOT property\n", win);
 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: desktop window (%lx) is subwindow of root window (%lx)\n",win,root);
 147         else
 148                 fprintf(stderr, "Conky: desktop window (%lx) is root window\n",win);
 149
 150         return win;
 151 }
 152
 153 /* sets background to ParentRelative for the Window and all parents */
 154 inline void set_transparent_background(Window win)
 155 {
 156         static int colour_set = -1;
 157         if (set_transparent) {
 158                 Window parent = win;
 159                 unsigned int i;
 160                 for (i = 0; i < 50 && parent != RootWindow(display, screen); i++) {
 161                         Window r, *children;
 162                         unsigned int n;
 163
 164                         XSetWindowBackgroundPixmap(display, parent, ParentRelative);
 165
 166                         XQueryTree(display, parent, &r, &parent, &children, &n);
 167                         XFree(children);
 168                         }
 169         } else if (colour_set != background_colour) {
 170                 XSetWindowBackground(display, win, background_colour);
 171                 colour_set = background_colour;
 172 }
 173         //XClearWindow(display, win); not sure why this was here
 174 }
 175
 176 void init_window(int own_window, int w, int h, int set_trans, int back_colour, char * nodename,
 177                  char **argv, int argc)
 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
 185         nodename = (char *)nodename;
 186
 187 #ifdef OWN_WINDOW
 188         if (own_window) {
 189                 {
 190                         /* Allow WM control of conky again.  Shielding conky from the WM
 191                          * via override redirect creates more problems than it's worth and
 192                          * makes it impossible to use tools like devilspie to manage the
 193                          * conky windows beyond the parametsrs we offer.  Also, button
 194                          * press events are now explicitly forwarded to the root window. */
 195                         XSetWindowAttributes attrs = {
 196                                 ParentRelative,0L,0,0L,0,0,Always,0L,0L,False,
 197                                 StructureNotifyMask|ExposureMask|ButtonPressMask,
 198                                 0L,False,0,0 };
 199
 200                         XClassHint classHint;
 201                         XWMHints wmHint;
 202                         char window_title[256];
 203
 204                         window.root = find_desktop_window();
 205
 206                         window.window = XCreateWindow(display, window.root,
 207                                                       window.x, window.y, w, h, 0,
 208                                                       CopyFromParent,
 209                                                       InputOutput,
 210                                                       CopyFromParent,
 211                                                       CWBackPixel|CWOverrideRedirect, &attrs);
 212
 213                         fprintf(stderr, "Conky: drawing to created window (%lx)\n", window.window);
 214
 215                         classHint.res_name = "conky";
 216                         classHint.res_class = classHint.res_name;
 217
 218                         wmHint.flags = InputHint | StateHint;
 219                         wmHint.input = False;
 220                         wmHint.initial_state = NormalState;
 221
 222                         sprintf(window_title,WINDOW_NAME_FMT,nodename);
 223
 224                         XmbSetWMProperties (display, window.window, window_title, NULL,
 225                                             argv, argc,
 226                                             NULL, &wmHint, &classHint);
 227
 228                         /* Sets an empty WM_PROTOCOLS property */
 229                         XSetWMProtocols(display,window.window,NULL,0);
 230
 231                         XLowerWindow(display, window.window);
 232                         XMapWindow(display, window.window);
 233
 234                 }
 235         } else
 236 #endif
 237                 /* root / desktop window */
 238         {
 239                 XWindowAttributes attrs;
 240
 241                 if (!window.window)
 242                         window.window = find_desktop_window();
 243
 244                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 245                         window.width = attrs.width;
 246                         window.height = attrs.height;
 247                 }
 248
 249                 fprintf(stderr, "Conky: drawing to desktop window\n");
 250         }
 251
 252         /* Drawable is same as window. This may be changed by double buffering. */
 253         window.drawable = window.window;
 254
 255 #ifdef XDBE
 256         if (use_xdbe) {
 257                 int major, minor;
 258                 if (!XdbeQueryExtension(display, &major, &minor)) {
 259                         use_xdbe = 0;
 260                 } else {
 261                         window.back_buffer =
 262                             XdbeAllocateBackBufferName(display,
 263                                                        window.window,
 264                                                        XdbeBackground);
 265                         if (window.back_buffer != None) {
 266                                 window.drawable = window.back_buffer;
 267                                 fprintf(stderr,
 268                                         "Conky: drawing to double buffer\n");
 269                         } else
 270                                 use_xdbe = 0;
 271                 }
 272                 if (!use_xdbe)
 273                         ERR("failed to set up double buffer");
 274         }
 275         if (!use_xdbe)
 276                 fprintf(stderr, "Conky: drawing to single buffer\n");
 277 #endif
 278
 279         XFlush(display);
 280
 281         /*set_transparent_background(window.window); must be done after double buffer stuff? */
 282 #ifdef OWN_WINDOW
 283         /*if (own_window) {
 284         set_transparent_background(window.window);
 285                 XClearWindow(display, window.window);
 286 }*/
 287 #endif
 288
 289         XSelectInput(display, window.window, ExposureMask
 290 #ifdef OWN_WINDOW
 291                      | (own_window
 292                         ? (StructureNotifyMask | PropertyChangeMask | ButtonPressMask) : 0)
 293 #endif
 294             );
 295 }
 296
 297 static Window find_subwindow(Window win, int w, int h)
 298 {
 299         unsigned int i, j;
 300         Window troot, parent, *children;
 301         unsigned int n;
 302
 303         /* search subwindows with same size as display or work area */
 304
 305         for (i = 0; i < 10; i++) {
 306                 XQueryTree(display, win, &troot, &parent, &children, &n);
 307
 308                 for (j = 0; j < n; j++) {
 309                         XWindowAttributes attrs;
 310
 311                         if (XGetWindowAttributes
 312                             (display, children[j], &attrs)) {
 313                                 /* Window must be mapped and same size as display or work space */
 314                                 if (attrs.map_state != 0 &&
 315                                     ((attrs.width == display_width
 316                                       && attrs.height == display_height)
 317                                      || (attrs.width == w
 318                                          && attrs.height == h))) {
 319                                         win = children[j];
 320                                         break;
 321                                 }
 322                         }
 323                 }
 324
 325                 XFree(children);
 326                 if (j == n)
 327                         break;
 328         }
 329
 330         return win;
 331 }
 332
 333 long get_x11_color(const char *name)
 334 {
 335         XColor color;
 336         color.pixel = 0;
 337         if (!XParseColor
 338             (display, DefaultColormap(display, screen), name, &color)) {
 339                 /* lets check if it's a hex colour with the # missing in front
 340                  * if yes, then do something about it
 341                  */
 342                 char newname[64];
 343                 newname[0] = '#';
 344                 strncpy(&newname[1], name, 62);
 345                 /* now lets try again */
 346                 if (!XParseColor(display, DefaultColormap(display, screen), &newname[0], &color)) {
 347                         ERR("can't parse X color '%s'", name);
 348                         return 0xFF00FF;
 349                 }
 350         }
 351         if (!XAllocColor
 352             (display, DefaultColormap(display, screen), &color))
 353                 ERR("can't allocate X color '%s'", name);
 354
 355         return (long) color.pixel;
 356 }
 357
 358 void create_gc()
 359 {
 360         XGCValues values;
 361         values.graphics_exposures = 0;
 362         values.function = GXcopy;
 363         window.gc = XCreateGC(display, window.drawable,
 364                               GCFunction | GCGraphicsExposures, &values);
 365 }
 366
 367 #endif /* X11 */