i3
xcursor.c
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1 /*
2  * vim:ts=4:sw=4:expandtab
3  *
4  * i3 - an improved dynamic tiling window manager
5  * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
6  *
7  * xcursor.c: libXcursor support for themed cursors.
8  *
9  */
10 #include <assert.h>
11 #include <X11/Xcursor/Xcursor.h>
12 #include <X11/cursorfont.h>
13 
14 #include "i3.h"
15 #include "xcb.h"
16 #include "xcursor.h"
17 
18 static Cursor cursors[XCURSOR_CURSOR_MAX];
19 
20 static const int xcb_cursors[XCURSOR_CURSOR_MAX] = {
25 };
26 
27 static Cursor load_cursor(const char *name) {
28  Cursor c = XcursorLibraryLoadCursor(xlibdpy, name);
29  if (c == None)
30  xcursor_supported = false;
31  return c;
32 }
33 
37  cursors[XCURSOR_CURSOR_RESIZE_VERTICAL] = load_cursor("sb_v_double_arrow");
39 }
40 
41 /*
42  * Sets the cursor of the root window to the 'pointer' cursor.
43  *
44  * This function is called when i3 is initialized, because with some login
45  * managers, the root window will not have a cursor otherwise.
46  *
47  * We have a separate xcursor function to use the same X11 connection as the
48  * xcursor_load_cursors() function. If we mix the Xlib and the XCB connection,
49  * races might occur (even though we flush the Xlib connection).
50  *
51  */
52 void xcursor_set_root_cursor(int cursor_id) {
53  XSetWindowAttributes attributes;
54  attributes.cursor = xcursor_get_cursor(cursor_id);
55  XChangeWindowAttributes(xlibdpy, DefaultRootWindow(xlibdpy), CWCursor, &attributes);
56  XFlush(xlibdpy);
57 }
58 
60  assert(c >= 0 && c < XCURSOR_CURSOR_MAX);
61  return cursors[c];
62 }
63 
65  assert(c >= 0 && c < XCURSOR_CURSOR_MAX);
66  return xcb_cursors[c];
67 }