mwmhints.c revision 645f5050 
1/*
2 *  [ ctwm ]
3 *
4 *  Copyright 2014 Olaf Seibert
5 *
6 * Permission to use, copy, modify and distribute this software [ctwm]
7 * and its documentation for any purpose is hereby granted without fee,
8 * provided that the above copyright notice appear in all copies and
9 * that both that copyright notice and this permission notice appear in
10 * supporting documentation, and that the name of Olaf Seibert not be
11 * used in advertising or publicity pertaining to distribution of the
12 * software without specific, written prior permission. Olaf Seibert
13 * makes no representations about the suitability of this software for
14 * any purpose. It is provided "as is" without express or implied
15 * warranty.
16 *
17 * Olaf Seibert DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN
19 * NO EVENT SHALL Olaf Seibert BE LIABLE FOR ANY SPECIAL, INDIRECT OR
20 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
21 * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
22 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE
23 * USE OR PERFORMANCE OF THIS SOFTWARE.
24 *
25 * Author:  Olaf Seibert [ rhialto@falu.nl ][ May 2014 ]
26 */
27
28/*
29 * Code to look at a few Motif Window Manager hints.
30 *
31 * Only the bits marked [v] are actually looked at.
32 * For the rest, ctwm has no concept, really.
33 *
34 * For some information about the meaning of the flags, see
35 * the manual page VendorShell(3) from the Motif library.
36 */
37
38#include <stdio.h>
39
40#include "twm.h"
41#include "mwmhints.h"
42
43static Atom MOTIF_WM_HINTS = None;
44
45int GetMWMHints(Window w, MotifWmHints *mwmHints)
46{
47    int success;
48    Atom actual_type;
49    int actual_format;
50    unsigned long nitems;
51    unsigned long bytes_after;
52    unsigned long *prop = NULL;
53
54    /* Defaults for when not found */
55    mwmHints->flags = 0;
56    mwmHints->functions = 0;
57    mwmHints->decorations = 0;
58#ifdef FULL_MWM_DATA
59    mwmHints->input_mode = 0;
60    mwmHints->status = 0;
61#endif
62
63    if (MOTIF_WM_HINTS == (Atom)None) {
64	MOTIF_WM_HINTS = XInternAtom(dpy, "_MOTIF_WM_HINTS", True);
65    }
66
67    success = XGetWindowProperty(
68			dpy, w, MOTIF_WM_HINTS,
69			0, 5, 		/* long_offset, long long_length, */
70			False,		/* Bool delete, */
71			AnyPropertyType,/* Atom req_type */
72			&actual_type, 	/* Atom *actual_type_return, */
73			&actual_format, /* int *actual_format_return, */
74			&nitems, 	/* unsigned long *nitems_return,  */
75			&bytes_after, 	/* unsigned long * */
76			(unsigned char **)&prop);	/* unsigned char ** */
77
78    if (success == Success &&
79	    actual_type == MOTIF_WM_HINTS &&
80	    actual_format == 32 &&
81	    nitems >= 3) {
82	mwmHints->flags = (int)prop[0];
83	mwmHints->functions = (int)prop[1];
84	mwmHints->decorations = (int)prop[2];
85#ifdef FULL_MWM_DATA
86	mwmHints->input_mode = (int)prop[3];
87	mwmHints->status = (int)prop[4];
88#endif
89
90	if (mwmHints->flags & MWM_HINTS_FUNCTIONS) {
91	    if (mwmHints->functions & MWM_FUNC_ALL) {
92		mwmHints->functions ^= ~0;
93	    }
94	}
95	if (mwmHints->flags & MWM_HINTS_DECORATIONS) {
96	    if (mwmHints->decorations & MWM_DECOR_ALL) {
97		mwmHints->decorations ^= ~0;
98	    }
99	}
100
101	success = True;
102    } else {
103	success = False;
104    }
105
106    if (prop != NULL) {
107    	XFree(prop);
108    }
109
110    return success;
111}
112
113