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38 | ****************************************************************************/ |
39 | |
40 | #include "qxcbwmsupport.h" |
41 | #include "qxcbscreen.h" |
42 | |
43 | #include <qdebug.h> |
44 | |
45 | QT_BEGIN_NAMESPACE |
46 | |
47 | QXcbWMSupport::QXcbWMSupport(QXcbConnection *c) |
48 | : QXcbObject(c) |
49 | { |
50 | updateNetWMAtoms(); |
51 | updateVirtualRoots(); |
52 | } |
53 | |
54 | bool QXcbWMSupport::isSupportedByWM(xcb_atom_t atom) const |
55 | { |
56 | return net_wm_atoms.contains(t: atom); |
57 | } |
58 | |
59 | |
60 | |
61 | void 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(R: reply.get())/sizeof(xcb_atom_t); |
77 | xcb_atom_t *atoms = (xcb_atom_t *)xcb_get_property_value(R: reply.get()); |
78 | int s = net_wm_atoms.size(); |
79 | net_wm_atoms.resize(asize: s + len); |
80 | memcpy(dest: net_wm_atoms.data() + s, src: atoms, n: 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 |
89 | void QXcbWMSupport::updateVirtualRoots() |
90 | { |
91 | net_virtual_roots.clear(); |
92 | |
93 | if (!isSupportedByWM(atom: atom(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(R: reply.get())/sizeof(xcb_window_t); |
109 | xcb_window_t *roots = (xcb_window_t *)xcb_get_property_value(R: reply.get()); |
110 | int s = net_virtual_roots.size(); |
111 | net_virtual_roots.resize(asize: s + len); |
112 | memcpy(dest: net_virtual_roots.data() + s, src: roots, n: 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 | |
129 | QT_END_NAMESPACE |
130 | |