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 {
 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
 184         nodename = (char *)nodename;
 185
 186 #ifdef OWN_WINDOW
 187         if (own_window) {
 188                 {
 189                         /* DRASTICALLY SIMPLIFIED -
 190                          * override_redirect=True impedes the WM from manipulating
 191                          * the window, adding decorations, etc.  we do not register
 192                          * for button events so you should have menu clicking over
 193                          * the conky window now too.  PHK. */
 194                         XSetWindowAttributes attrs = {
 195                                 ParentRelative,0L,0,0L,0,0,Always,0L,0L,False,
 196                                 StructureNotifyMask|ExposureMask,
 197                                 0L,True,0,0 };
 198
 199                         window.root = find_desktop_window();
 200
 201                         window.window = XCreateWindow(display, window.root,
 202                                                       window.x, window.y, w, h, 0,
 203                                                       CopyFromParent,
 204                                                       InputOutput,
 205                                                       CopyFromParent,
 206                                                       CWBackPixel|CWOverrideRedirect, &attrs);
 207
 208                         fprintf(stderr, "Conky: drawing to created window (%lx)\n", window.window);
 209
 210                         XLowerWindow(display, window.window);
 211
 212                         XMapWindow(display, window.window);
 213
 214                 }
 215         } else
 216 #endif
 217                 /* root / desktop window */
 218         {
 219                 XWindowAttributes attrs;
 220
 221                 if (!window.window)
 222                         window.window = find_desktop_window();
 223
 224                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 225                         window.width = attrs.width;
 226                         window.height = attrs.height;
 227                 }
 228
 229                 fprintf(stderr, "Conky: drawing to desktop window\n");
 230         }
 231
 232         /* Drawable is same as window. This may be changed by double buffering. */
 233         window.drawable = window.window;
 234
 235 #ifdef XDBE
 236         if (use_xdbe) {
 237                 int major, minor;
 238                 if (!XdbeQueryExtension(display, &major, &minor)) {
 239                         use_xdbe = 0;
 240                 } else {
 241                         window.back_buffer =
 242                             XdbeAllocateBackBufferName(display,
 243                                                        window.window,
 244                                                        XdbeBackground);
 245                         if (window.back_buffer != None) {
 246                                 window.drawable = window.back_buffer;
 247                                 fprintf(stderr,
 248                                         "Conky: drawing to double buffer\n");
 249                         } else
 250                                 use_xdbe = 0;
 251                 }
 252                 if (!use_xdbe)
 253                         ERR("failed to set up double buffer");
 254         }
 255         if (!use_xdbe)
 256                 fprintf(stderr, "Conky: drawing to single buffer\n");
 257 #endif
 258
 259         XFlush(display);
 260
 261         /*set_transparent_background(window.window); must be done after double buffer stuff? */
 262 #ifdef OWN_WINDOW
 263         /*if (own_window) {
 264         set_transparent_background(window.window);
 265                 XClearWindow(display, window.window);
 266 }*/
 267 #endif
 268
 269         XSelectInput(display, window.window, ExposureMask
 270 #ifdef OWN_WINDOW
 271                      | (own_window
 272                         ? (StructureNotifyMask | PropertyChangeMask) : 0)
 273 #endif
 274             );
 275 }
 276
 277 static Window find_subwindow(Window win, int w, int h)
 278 {
 279         unsigned int i, j;
 280         Window troot, parent, *children;
 281         unsigned int n;
 282
 283         /* search subwindows with same size as display or work area */
 284
 285         for (i = 0; i < 10; i++) {
 286                 XQueryTree(display, win, &troot, &parent, &children, &n);
 287
 288                 for (j = 0; j < n; j++) {
 289                         XWindowAttributes attrs;
 290
 291                         if (XGetWindowAttributes
 292                             (display, children[j], &attrs)) {
 293                                 /* Window must be mapped and same size as display or work space */
 294                                 if (attrs.map_state != 0 &&
 295                                     ((attrs.width == display_width
 296                                       && attrs.height == display_height)
 297                                      || (attrs.width == w
 298                                          && attrs.height == h))) {
 299                                         win = children[j];
 300                                         break;
 301                                 }
 302                         }
 303                 }
 304
 305                 XFree(children);
 306                 if (j == n)
 307                         break;
 308         }
 309
 310         return win;
 311 }
 312
 313 long get_x11_color(const char *name)
 314 {
 315         XColor color;
 316         color.pixel = 0;
 317         if (!XParseColor
 318             (display, DefaultColormap(display, screen), name, &color)) {
 319                 /* lets check if it's a hex colour with the # missing in front
 320                  * if yes, then do something about it
 321                  */
 322                 char newname[64];
 323                 newname[0] = '#';
 324                 strncpy(&newname[1], name, 62);
 325                 /* now lets try again */
 326                 if (!XParseColor(display, DefaultColormap(display, screen), &newname[0], &color)) {
 327                         ERR("can't parse X color '%s'", name);
 328                         return 0xFF00FF;
 329                 }
 330         }
 331         if (!XAllocColor
 332             (display, DefaultColormap(display, screen), &color))
 333                 ERR("can't allocate X color '%s'", name);
 334
 335         return (long) color.pixel;
 336 }
 337
 338 void create_gc()
 339 {
 340         XGCValues values;
 341         values.graphics_exposures = 0;
 342         values.function = GXcopy;
 343         window.gc = XCreateGC(display, window.drawable,
 344                               GCFunction | GCGraphicsExposures, &values);
 345 }
 346
 347 #endif /* X11 */