1 files changed, 124 insertions, 0 deletions
diff --git a/kdesktop/pixmapserver.h b/kdesktop/pixmapserver.h
new file mode 100644
index 000000000..e0f871988
--- /dev/null
+++ b/kdesktop/pixmapserver.h
@@ -0,0 +1,124 @@
+/* vi: ts=8 sts=4 sw=4
+ *
+ * This file is part of the KDE project, module kdesktop.
+ * Copyright (C) 1999 Geert Jansen <g.t.jansen@stud.tue.nl>
+ * 
+ * You can Freely distribute this program under the GNU General Public
+ * License. See the file "COPYING" for the exact licensing terms.
+ */
+
+#ifndef __PixmapServer_h_Included__
+#define __PixmapServer_h_Included__
+
+#include <qwindowdefs.h>
+
+#include <qwidget.h>
+#include <qmap.h>
+
+#include <X11/X.h>
+#include <X11/Xlib.h>
+
+/**
+ * Used internally by KPixmapServer.
+ */
+
+struct KPixmapInode 
+{
+    Qt::HANDLE handle;
+    Atom selection;
+};
+
+struct KPixmapData
+{
+    QPixmap *pixmap;
+    int usecount;
+    int refcount;
+};
+
+struct KSelectionInode
+{
+    Qt::HANDLE handle;
+    QString name;
+};
+
+/**
+ * KPixmapServer: Share pixmaps between X clients with deletion and
+ * multi-server capabilities. 
+ * The sharing is implemented using X11 Selections.
+ *
+ * @author Geert Jansen <g.t.jansen@stud.tue.nl>
+ */
+class KPixmapServer: public QWidget
+{
+    Q_OBJECT
+
+public:
+    KPixmapServer();
+    ~KPixmapServer();
+
+    /**
+     * Adds a pixmap to this server. This will make it available to all
+     * other X clients on the current display.
+     *
+     * You must never delete a pixmap that you add()'ed. The pixmap is 
+     * deleted when you call remove() and after all clients have stopped 
+     * using it.
+     *
+     * You can add the same pixmap under multiple names.
+     *
+     * @param name An X11-wide unique identifier for the pixmap.
+     * @param pm A pointer to the pixmap.
+     * @param overwrite Should an pixmap with the same name be overwritten?
+     */
+    void add(QString name, QPixmap *pm, bool overwrite=true);
+
+    /**
+     * Remove a pixmap from the server. This will delete the pixmap after 
+     * all clients have stopped using it.
+     *
+     * @param name The name of the shared pixmap.
+     */
+    void remove(QString name);
+
+    /**
+     * List all pixmaps currently served by this server.
+     * 
+     * @return A QStringList containing all the shared pixmaps.
+     */
+    QStringList list();
+
+    /**
+     * Re-set ownership of the selection providing the shared pixmap.
+     *
+     * @param name The name of the shared pixmap.
+     */
+    void setOwner(QString name);
+
+signals:
+    /** 
+     * This signal is emitted when the selection providing the named pixmap
+     * is disowned. This means that said pixmap won't be served anymore by 
+     * this server, though it can be served by another. You can re-aqcuire
+     * the selection by calling setOwner().
+     */
+    void selectionCleared(QString name);
+
+protected:
+    bool x11Event(XEvent *);
+
+private:
+    Atom pixmap;
+
+    QMap<QString,KPixmapInode> m_Names;
+    QMap<Atom,KSelectionInode> m_Selections;
+    QMap<HANDLE,KPixmapData> m_Data;
+    QMap<Atom,HANDLE> m_Active;
+
+    typedef QMap<QString,KPixmapInode>::Iterator NameIterator;
+    typedef QMap<Atom,KSelectionInode>::Iterator SelectionIterator;
+    typedef QMap<HANDLE,KPixmapData>::Iterator DataIterator;
+    typedef QMap<Atom,HANDLE>::Iterator AtomIterator;
+};
+
+
+#endif // __PixmapServer_h_Included__