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- // -*- c++ -*-
- #ifndef _GLIBMM_LISTHANDLE_H
- #define _GLIBMM_LISTHANDLE_H
-
- /* $Id: listhandle.h,v 1.3 2003/04/21 17:39:41 murrayc Exp $ */
-
- /* Copyright (C) 2002 The gtkmm Development Team
- *
- * 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; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
- #include <glib/glist.h>
- #include <glibmm/containerhandle_shared.h>
-
-
- namespace Glib
- {
-
- namespace Container_Helpers
- {
-
- #ifndef DOXYGEN_SHOULD_SKIP_THIS
-
- /* Create and fill a GList as efficient as possible.
- * This requires bidirectional iterators.
- */
- template <class Bi, class Tr>
- GList* create_list(Bi pbegin, Bi pend, Tr)
- {
- GList* head = 0;
-
- while(pend != pbegin)
- {
- // Use & to force a warning if the iterator returns a temporary object.
- const void *const item = Tr::to_c_type(*&*--pend);
- head = g_list_prepend(head, const_cast<void*>(item));
- }
-
- return head;
- }
-
- /* Create a GList from a 0-terminated input sequence.
- * Build it in reverse order and reverse the whole list afterwards,
- * because appending to the list would be horribly inefficient.
- */
- template <class For, class Tr>
- GList* create_list(For pbegin, Tr)
- {
- GList* head = 0;
-
- while(*pbegin)
- {
- // Use & to force a warning if the iterator returns a temporary object.
- const void *const item = Tr::to_c_type(*&*pbegin);
- head = g_list_prepend(head, const_cast<void*>(item));
- ++pbegin;
- }
-
- return g_list_reverse(head);
- }
-
-
- /* Convert from any container that supports bidirectional iterators.
- */
- template <class Tr, class Cont>
- struct ListSourceTraits
- {
- static GList* get_data(const Cont& cont)
- { return Glib::Container_Helpers::create_list(cont.begin(), cont.end(), Tr()); }
-
- static const Glib::OwnershipType initial_ownership = Glib::OWNERSHIP_SHALLOW;
- };
-
- /* Convert from a 0-terminated array. The Cont
- * argument must be a pointer to the first element.
- */
- template <class Tr, class Cont>
- struct ListSourceTraits<Tr,Cont*>
- {
- static GList* get_data(const Cont* array)
- { return (array) ? Glib::Container_Helpers::create_list(array, Tr()) : 0; }
-
- static const Glib::OwnershipType initial_ownership = Glib::OWNERSHIP_SHALLOW;
- };
-
- template <class Tr, class Cont>
- struct ListSourceTraits<Tr,const Cont*> : ListSourceTraits<Tr,Cont*>
- {};
-
- /* Convert from a 0-terminated array. The Cont argument must be a pointer
- * to the first element. For consistency, the array must be 0-terminated,
- * even though the array size is known at compile time.
- */
- template <class Tr, class Cont, size_t N>
- struct ListSourceTraits<Tr,Cont[N]>
- {
- static GList* get_data(const Cont* array)
- { return Glib::Container_Helpers::create_list(array, array + (N - 1), Tr()); }
-
- static const Glib::OwnershipType initial_ownership = Glib::OWNERSHIP_SHALLOW;
- };
-
- template <class Tr, class Cont, size_t N>
- struct ListSourceTraits<Tr,const Cont[N]> : ListSourceTraits<Tr,Cont[N]>
- {};
-
- #endif /* DOXYGEN_SHOULD_SKIP_THIS */
-
-
- /**
- * @ingroup ContHelpers
- * If a method takes this as an argument, or has this as a return type, then you can use a standard
- * container such as std::list or std::vector.
- */
- template <class Tr>
- class ListHandleIterator
- {
- public:
- typedef typename Tr::CppType CppType;
- typedef typename Tr::CType CType;
-
- typedef std::forward_iterator_tag iterator_category;
- typedef CppType value_type;
- typedef ptrdiff_t difference_type;
- typedef value_type reference;
- typedef void pointer;
-
- explicit inline ListHandleIterator(const GList* node);
-
- inline value_type operator*() const;
- inline ListHandleIterator<Tr> & operator++();
- inline const ListHandleIterator<Tr> operator++(int);
-
- inline bool operator==(const ListHandleIterator<Tr>& rhs) const;
- inline bool operator!=(const ListHandleIterator<Tr>& rhs) const;
-
- private:
- const GList* node_;
- };
-
- } // namespace Container_Helpers
-
-
- /**
- * @ingroup ContHandles
- */
- template < class T, class Tr = Glib::Container_Helpers::TypeTraits<T> >
- class ListHandle
- {
- public:
- typedef typename Tr::CppType CppType;
- typedef typename Tr::CType CType;
-
- typedef CppType value_type;
- typedef size_t size_type;
- typedef ptrdiff_t difference_type;
-
- typedef Glib::Container_Helpers::ListHandleIterator<Tr> const_iterator;
- typedef Glib::Container_Helpers::ListHandleIterator<Tr> iterator;
-
- template <class Cont> inline
- ListHandle(const Cont& container);
-
- // Take over ownership of an array created by GTK+ functions.
- inline ListHandle(GList* glist, Glib::OwnershipType ownership);
-
- // Copying clears the ownership flag of the source handle.
- inline ListHandle(const ListHandle<T,Tr>& other);
-
- ~ListHandle();
-
- inline const_iterator begin() const;
- inline const_iterator end() const;
-
- template <class U> inline operator std::vector<U>() const;
- template <class U> inline operator std::deque<U>() const;
- template <class U> inline operator std::list<U>() const;
-
- template <class Cont> inline
- void assign_to(Cont& container) const;
-
- template <class Out> inline
- void copy(Out pdest) const;
-
- inline GList* data() const;
- inline size_t size() const;
- inline bool empty() const;
-
- private:
- GList * plist_;
- mutable Glib::OwnershipType ownership_;
-
- // No copy assignment.
- ListHandle<T,Tr>& operator=(const ListHandle<T,Tr>&);
- };
-
-
- /***************************************************************************/
- /* Inline implementation */
- /***************************************************************************/
-
- #ifndef DOXYGEN_SHOULD_SKIP_THIS
-
- namespace Container_Helpers
- {
-
- /**** Glib::Container_Helpers::ListHandleIterator<> ************************/
-
- template <class Tr> inline
- ListHandleIterator<Tr>::ListHandleIterator(const GList* node)
- :
- node_ (node)
- {}
-
- template <class Tr> inline
- typename ListHandleIterator<Tr>::value_type ListHandleIterator<Tr>::operator*() const
- {
- return Tr::to_cpp_type(static_cast<typename Tr::CTypeNonConst>(node_->data));
- }
-
- template <class Tr> inline
- ListHandleIterator<Tr>& ListHandleIterator<Tr>::operator++()
- {
- node_ = node_->next;
- return *this;
- }
-
- template <class Tr> inline
- const ListHandleIterator<Tr> ListHandleIterator<Tr>::operator++(int)
- {
- const ListHandleIterator<Tr> tmp (*this);
- node_ = node_->next;
- return tmp;
- }
-
- template <class Tr> inline
- bool ListHandleIterator<Tr>::operator==(const ListHandleIterator<Tr>& rhs) const
- {
- return (node_ == rhs.node_);
- }
-
- template <class Tr> inline
- bool ListHandleIterator<Tr>::operator!=(const ListHandleIterator<Tr>& rhs) const
- {
- return (node_ != rhs.node_);
- }
-
- } // namespace Container_Helpers
-
-
- /**** Glib::ListHandle<> ***************************************************/
-
- template <class T, class Tr>
- template <class Cont>
- inline
- ListHandle<T,Tr>::ListHandle(const Cont& container)
- :
- plist_ (Glib::Container_Helpers::ListSourceTraits<Tr,Cont>::get_data(container)),
- ownership_ (Glib::Container_Helpers::ListSourceTraits<Tr,Cont>::initial_ownership)
- {}
-
- template <class T, class Tr> inline
- ListHandle<T,Tr>::ListHandle(GList* glist, Glib::OwnershipType ownership)
- :
- plist_ (glist),
- ownership_ (ownership)
- {}
-
- template <class T, class Tr> inline
- ListHandle<T,Tr>::ListHandle(const ListHandle<T,Tr>& other)
- :
- plist_ (other.plist_),
- ownership_ (other.ownership_)
- {
- other.ownership_ = Glib::OWNERSHIP_NONE;
- }
-
- template <class T, class Tr>
- ListHandle<T,Tr>::~ListHandle()
- {
- if(ownership_ != Glib::OWNERSHIP_NONE)
- {
- if(ownership_ != Glib::OWNERSHIP_SHALLOW)
- {
- // Deep ownership: release each container element.
- for(GList* node = plist_; node != 0; node = node->next)
- Tr::release_c_type(static_cast<typename Tr::CTypeNonConst>(node->data));
- }
- g_list_free(plist_);
- }
- }
-
- template <class T, class Tr> inline
- typename ListHandle<T,Tr>::const_iterator ListHandle<T,Tr>::begin() const
- {
- return Glib::Container_Helpers::ListHandleIterator<Tr>(plist_);
- }
-
- template <class T, class Tr> inline
- typename ListHandle<T,Tr>::const_iterator ListHandle<T,Tr>::end() const
- {
- return Glib::Container_Helpers::ListHandleIterator<Tr>(0);
- }
-
- template <class T, class Tr>
- template <class U>
- inline
- ListHandle<T,Tr>::operator std::vector<U>() const
- {
- #ifdef GLIBMM_HAVE_TEMPLATE_SEQUENCE_CTORS
- return std::vector<U>(this->begin(), this->end());
- #else
- std::vector<U> temp;
- temp.reserve(this->size());
- Glib::Container_Helpers::fill_container(temp, this->begin(), this->end());
- return temp;
- #endif
- }
-
- template <class T, class Tr>
- template <class U>
- inline
- ListHandle<T,Tr>::operator std::deque<U>() const
- {
- #ifdef GLIBMM_HAVE_TEMPLATE_SEQUENCE_CTORS
- return std::deque<U>(this->begin(), this->end());
- #else
- std::deque<U> temp;
- Glib::Container_Helpers::fill_container(temp, this->begin(), this->end());
- return temp;
- #endif
- }
-
- template <class T, class Tr>
- template <class U>
- inline
- ListHandle<T,Tr>::operator std::list<U>() const
- {
- #ifdef GLIBMM_HAVE_TEMPLATE_SEQUENCE_CTORS
- return std::list<U>(this->begin(), this->end());
- #else
- std::list<U> temp;
- Glib::Container_Helpers::fill_container(temp, this->begin(), this->end());
- return temp;
- #endif
- }
-
- template <class T, class Tr>
- template <class Cont>
- inline
- void ListHandle<T,Tr>::assign_to(Cont& container) const
- {
- #ifdef GLIBMM_HAVE_TEMPLATE_SEQUENCE_CTORS
- container.assign(this->begin(), this->end());
- #else
- Cont temp;
- Glib::Container_Helpers::fill_container(temp, this->begin(), this->end());
- container.swap(temp);
- #endif
- }
-
- template <class T, class Tr>
- template <class Out>
- inline
- void ListHandle<T,Tr>::copy(Out pdest) const
- {
- std::copy(this->begin(), this->end(), pdest);
- }
-
- template <class T, class Tr> inline
- GList* ListHandle<T,Tr>::data() const
- {
- return plist_;
- }
-
- template <class T, class Tr> inline
- size_t ListHandle<T,Tr>::size() const
- {
- return g_list_length(plist_);
- }
-
- template <class T, class Tr> inline
- bool ListHandle<T,Tr>::empty() const
- {
- return (plist_ == 0);
- }
-
- #endif /* DOXYGEN_SHOULD_SKIP_THIS */
-
- } // namespace Glib
-
-
- #endif /* _GLIBMM_LISTHANDLE_H */
-
-