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39
40#include "qxcbwmsupport.h"
41#include "qxcbscreen.h"
42
43#include <qdebug.h>
44
45QT_BEGIN_NAMESPACE
46
47QXcbWMSupport::QXcbWMSupport(QXcbConnection *c)
48 : QXcbObject(c)
49{
50 updateNetWMAtoms();
51 updateVirtualRoots();
52}
53
54bool QXcbWMSupport::isSupportedByWM(xcb_atom_t atom) const
55{
56 return net_wm_atoms.contains(atom);
57}
58
59
60
61void QXcbWMSupport::updateNetWMAtoms()
62{
63 net_wm_atoms.clear();
64
65 xcb_window_t root = connection()->primaryScreen()->root();
66 int offset = 0;
67 int remaining = 0;
68 do {
69 auto reply = Q_XCB_REPLY(xcb_get_property, xcb_connection(), false, root, atom(QXcbAtom::_NET_SUPPORTED), XCB_ATOM_ATOM, offset, 1024);
70 if (!reply)
71 break;
72
73 remaining = 0;
74
75 if (reply->type == XCB_ATOM_ATOM && reply->format == 32) {
76 int len = xcb_get_property_value_length(reply.get())/sizeof(xcb_atom_t);
77 xcb_atom_t *atoms = (xcb_atom_t *)xcb_get_property_value(reply.get());
78 int s = net_wm_atoms.size();
79 net_wm_atoms.resize(s + len);
80 memcpy(net_wm_atoms.data() + s, atoms, len*sizeof(xcb_atom_t));
81
82 remaining = reply->bytes_after;
83 offset += len;
84 }
85 } while (remaining > 0);
86}
87
88// update the virtual roots array
89void QXcbWMSupport::updateVirtualRoots()
90{
91 net_virtual_roots.clear();
92
93 if (!isSupportedByWM(atom(QXcbAtom::_NET_VIRTUAL_ROOTS)))
94 return;
95
96 xcb_window_t root = connection()->primaryScreen()->root();
97 int offset = 0;
98 int remaining = 0;
99 do {
100 auto reply = Q_XCB_REPLY(xcb_get_property, xcb_connection(),
101 false, root, atom(QXcbAtom::_NET_VIRTUAL_ROOTS), XCB_ATOM_WINDOW, offset, 1024);
102 if (!reply)
103 break;
104
105 remaining = 0;
106
107 if (reply->type == XCB_ATOM_WINDOW && reply->format == 32) {
108 int len = xcb_get_property_value_length(reply.get())/sizeof(xcb_window_t);
109 xcb_window_t *roots = (xcb_window_t *)xcb_get_property_value(reply.get());
110 int s = net_virtual_roots.size();
111 net_virtual_roots.resize(s + len);
112 memcpy(net_virtual_roots.data() + s, roots, len*sizeof(xcb_window_t));
113
114 remaining = reply->bytes_after;
115 offset += len;
116 }
117
118 } while (remaining > 0);
119
120//#define VIRTUAL_ROOTS_DEBUG
121#ifdef VIRTUAL_ROOTS_DEBUG
122 qDebug("======== updateVirtualRoots");
123 for (int i = 0; i < net_virtual_roots.size(); ++i)
124 qDebug() << connection()->atomName(net_virtual_roots.at(i));
125 qDebug("======== updateVirtualRoots");
126#endif
127}
128
129QT_END_NAMESPACE
130