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List:       kde-commits
Subject:    [kde-workspace/frameworks-scratch] kwin: Introduce a wrapper class for InternAtom
From:       Martin_Gräßlin <mgraesslin () kde ! org>
Date:       2013-09-10 13:31:08
Message-ID: E1VJO28-0002fr-Fv () scm ! kde ! org
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Git commit 6c04b1cc76282ed64f80fb08f9fbc0a252298b6b by Martin Gräßlin.
Committed on 10/09/2013 at 11:06.
Pushed by graesslin into branch 'frameworks-scratch'.

Introduce a wrapper class for InternAtom

Not extending Xcb::Wrapper as it does not operate on a window.
Instead it is a specified class for the specific usecase.

M  +43   -0    kwin/xcbutils.h

http://commits.kde.org/kde-workspace/6c04b1cc76282ed64f80fb08f9fbc0a252298b6b

diff --git a/kwin/xcbutils.h b/kwin/xcbutils.h
index 047885e..9495d89 100644
--- a/kwin/xcbutils.h
+++ b/kwin/xcbutils.h
@@ -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;  


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