1 files changed, 114 insertions, 0 deletions
diff --git a/WebCore/dom/DocPtr.h b/WebCore/dom/DocPtr.h
new file mode 100644
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--- /dev/null
+++ b/WebCore/dom/DocPtr.h
@@ -0,0 +1,114 @@
+/*
+ * This file is part of the DOM implementation for KDE.
+ * Copyright (C) 2005, 2006 Apple Computer, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef DocPtr_h
+#define DocPtr_h
+
+namespace WebCore {
+
+template <class T> class DocPtr {
+public:
+    DocPtr() : m_ptr(0) {}
+    DocPtr(T *ptr) : m_ptr(ptr) { if (ptr) ptr->selfOnlyRef(); }
+    DocPtr(const DocPtr &o) : m_ptr(o.m_ptr) { if (T *ptr = m_ptr) ptr->selfOnlyRef(); }
+    ~DocPtr() { if (T *ptr = m_ptr) ptr->selfOnlyDeref(); }
+    
+    template <class U> DocPtr(const DocPtr<U> &o) : m_ptr(o.get()) { if (T *ptr = m_ptr) ptr->selfOnlyRef(); }
+    
+    void resetSkippingRef(T *o) { m_ptr = o; }
+    
+    T *get() const { return m_ptr; }
+    
+    T &operator*() const { return *m_ptr; }
+    T *operator->() const { return m_ptr; }
+    
+    bool operator!() const { return !m_ptr; }
+
+    // this type conversion operator allows implicit conversion to
+    // bool but not to other integer types
+    
+    typedef T * (DocPtr::*UnspecifiedBoolType)() const;
+    operator UnspecifiedBoolType() const
+    {
+        return m_ptr ? &DocPtr::get : 0;
+    }
+    
+    DocPtr &operator=(const DocPtr &);
+    DocPtr &operator=(T *);
+    
+ private:
+    T *m_ptr;
+};
+
+template <class T> DocPtr<T> &DocPtr<T>::operator=(const DocPtr<T> &o) 
+{
+    T *optr = o.m_ptr;
+    if (optr)
+        optr->selfOnlyRef();
+    if (T *ptr = m_ptr)
+        ptr->selfOnlyDeref();
+    m_ptr = optr;
+        return *this;
+}
+
+template <class T> inline DocPtr<T> &DocPtr<T>::operator=(T *optr)
+{
+    if (optr)
+        optr->selfOnlyRef();
+    if (T *ptr = m_ptr)
+        ptr->selfOnlyDeref();
+    m_ptr = optr;
+    return *this;
+}
+
+template <class T> inline bool operator==(const DocPtr<T> &a, const DocPtr<T> &b) 
+{ 
+    return a.get() == b.get(); 
+}
+
+template <class T> inline bool operator==(const DocPtr<T> &a, const T *b) 
+{ 
+    return a.get() == b; 
+}
+
+template <class T> inline bool operator==(const T *a, const DocPtr<T> &b) 
+{
+    return a == b.get(); 
+}
+
+template <class T> inline bool operator!=(const DocPtr<T> &a, const DocPtr<T> &b) 
+{ 
+    return a.get() != b.get(); 
+}
+
+template <class T> inline bool operator!=(const DocPtr<T> &a, const T *b)
+{
+    return a.get() != b; 
+}
+
+template <class T> inline bool operator!=(const T *a, const DocPtr<T> &b) 
+{ 
+    return a != b.get(); 
+}
+
+} // namespace WebCore
+
+#endif // DocPtr_h