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Introduce a wrapper class for InternAtom

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Not extending Xcb::Wrapper as it does not operate on a window.
Instead it is a specified class for the specific usecase.
This commit is contained in:
Martin Gräßlin 2013-09-10 13:06:09 +02:00
parent 64dde54f35
commit c29a622be1
1 changed files with 43 additions and 0 deletions
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43
xcbutils.h
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@ -159,6 +159,49 @@ private:
Reply *m_reply;
};
class Atom
{
public:
explicit Atom(const QByteArray &name, bool onlyIfExists = false)
: m_retrieved(false)
, m_cookie(xcb_intern_atom_unchecked(connection(), onlyIfExists, name.length(), name.constData()))
, m_atom(XCB_ATOM_NONE)
, m_name(name)
{
}
~Atom() {
if (!m_retrieved && m_cookie.sequence) {
xcb_discard_reply(connection(), m_cookie.sequence);
}
}
operator xcb_atom_t() const {
(const_cast<Atom*>(this))->getReply();
return m_atom;
}
inline const QByteArray &name() const {
return m_name;
}
private:
void getReply() {
if (m_retrieved || !m_cookie.sequence) {
return;
}
ScopedCPointer<xcb_intern_atom_reply_t> reply(xcb_intern_atom_reply(connection(), m_cookie, nullptr));
if (!reply.isNull()) {
m_atom = reply->atom;
}
m_retrieved = true;
}
bool m_retrieved;
xcb_intern_atom_cookie_t m_cookie;
xcb_atom_t m_atom;
QByteArray m_name;
};
typedef Wrapper<xcb_get_window_attributes_reply_t, xcb_get_window_attributes_cookie_t, &xcb_get_window_attributes_reply, &xcb_get_window_attributes_unchecked> WindowAttributes;
typedef Wrapper<xcb_composite_get_overlay_window_reply_t, xcb_composite_get_overlay_window_cookie_t, &xcb_composite_get_overlay_window_reply, &xcb_composite_get_overlay_window_unchecked> OverlayWindow;