373 lines
9.2 KiB
C++
373 lines
9.2 KiB
C++
// -*- c++ -*-
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#ifndef _GLIBMM_CONTAINERS_H
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#define _GLIBMM_CONTAINERS_H
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/* $Id: containers.h,v 1.7 2005/11/23 07:22:43 murrayc Exp $ */
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/* containers.h
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*
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* Copyright (C) 1998-2002 The gtkmm Development Team
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <glib/glist.h>
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#include <glib/gslist.h>
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#include <glibmm/sarray.h> /* for backward compatibility */
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#include <iterator>
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#include <glibmmconfig.h>
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GLIBMM_USING_STD(bidirectional_iterator_tag)
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GLIBMM_USING_STD(forward_iterator_tag)
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#ifndef DOXYGEN_SHOULD_SKIP_THIS
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namespace Glib
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{
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template <class T> class List_Iterator;
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template <class T> class List_ConstIterator;
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template <class T> class List_ReverseIterator;
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// Most of these methods in the non-template classes needs to be moved
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// to implementation.
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//Daniel Elstner has ideas about generating these per-widget with m4. murrayc.
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extern GLIBMM_API gpointer glibmm_null_pointer;
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template <class T>
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class List_Iterator_Base
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{
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public:
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typedef T value_type;
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typedef T* pointer;
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typedef T& reference;
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} ;
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///For instance, List_Iterator< Gtk::Widget >
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template <class T>
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class List_Iterator : public List_Iterator_Base<T>
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{
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public:
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typedef std::bidirectional_iterator_tag iterator_category;
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typedef size_t size_type;
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typedef ptrdiff_t difference_type;
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typedef typename List_Iterator_Base<T>::pointer pointer;
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typedef typename List_Iterator_Base<T>::reference reference;
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GList* const* head_;
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GList* node_;
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typedef List_Iterator<T> Self;
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List_Iterator(GList* const& head, GList* node)
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: head_(&head), node_(node)
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{}
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List_Iterator()
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: head_(0), node_(0)
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{}
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List_Iterator(const Self& src)
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: head_(src.head_), node_(src.node_)
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{}
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bool operator==(const Self& src) const { return node_ == src.node_; }
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bool operator!=(const Self& src) const { return node_ != src.node_; }
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Self& operator++()
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{
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if (!node_)
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node_ = g_list_first(*head_);
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else
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node_ = (GList*)g_list_next(node_);
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return *this;
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}
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Self operator++(int)
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{
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Self tmp = *this;
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++*this;
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return tmp;
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}
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Self& operator--()
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{
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if (!node_)
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node_ = g_list_last(*head_);
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else
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node_ = (GList*)g_list_previous(node_);
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return *this;
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}
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Self operator--(int)
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{
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Self tmp = *this;
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--*this;
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return tmp;
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}
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reference operator*() const
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{
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return *(pointer)( node_ ? node_->data : glibmm_null_pointer );
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}
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pointer operator -> () const { return &operator*(); }
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};
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///For instance, SList_Iterator< Gtk::Widget >
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template <class T>
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class SList_Iterator : public List_Iterator_Base<T>
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{
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public:
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typedef std::forward_iterator_tag iterator_category;
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typedef size_t size_type;
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typedef ptrdiff_t difference_type;
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typedef typename List_Iterator_Base<T>::pointer pointer;
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typedef typename List_Iterator_Base<T>::reference reference;
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GSList* node_;
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typedef SList_Iterator<T> Self;
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SList_Iterator(GSList* node)
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: node_(node)
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{}
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SList_Iterator()
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: node_(0)
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{}
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SList_Iterator(const Self& src)
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: node_(src.node_)
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{}
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bool operator==(const Self& src) const { return node_ == src.node_; }
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bool operator!=(const Self& src) const { return node_ != src.node_; }
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Self& operator++()
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{
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node_ = g_slist_next(node_);
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return *this;
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}
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Self operator++(int)
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{
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Self tmp = *this;
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++*this;
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return tmp;
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}
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reference operator*() const
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{
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//g++ complains that this statement has no effect: g_assert(node_);
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return reinterpret_cast<T&>( node_ ? node_->data : glibmm_null_pointer );
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}
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pointer operator -> () const { return &operator*(); }
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};
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// This iterator variation returns T_IFace (wrapped from T_Impl)
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// For instance, List_Cpp_Iterator<GtkWidget, Gtk::Widget> is a little like std::list<Gtk::Widget>::iterator
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template<class T_Impl, class T_IFace>
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class List_Cpp_Iterator : public List_Iterator_Base<T_IFace>
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{
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public:
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typedef std::bidirectional_iterator_tag iterator_category;
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typedef size_t size_type;
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typedef ptrdiff_t difference_type;
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typedef typename List_Iterator_Base<T_IFace>::pointer pointer;
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typedef typename List_Iterator_Base<T_IFace>::reference reference;
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typedef List_Cpp_Iterator<T_Impl, T_IFace> Self;
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GList** head_;
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GList* node_;
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bool operator==(const Self& src) const { return node_ == src.node_; }
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bool operator!=(const Self& src) const { return node_ != src.node_; }
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List_Cpp_Iterator(GList*& head, GList* node )
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: head_(&head), node_(node )
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{}
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List_Cpp_Iterator()
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: head_(0), node_(0)
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{}
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List_Cpp_Iterator(const Self& src)
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: head_(src.head_), node_(src.node_)
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{}
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reference operator*() const
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{
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if (node_ && node_->data)
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{
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//We copy/paste the widget wrap() implementation here,
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//because we can not use a specific Glib::wrap(T_Impl) overload here,
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//because that would be "dependent", and g++ 3.4 does not allow that.
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//The specific Glib::wrap() overloads don't do anything special anyway.
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GObject* cobj = static_cast<GObject*>( (*node_).data );
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#ifdef GLIBMM_CAN_USE_DYNAMIC_CAST_IN_UNUSED_TEMPLATE_WITHOUT_DEFINITION
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return *(dynamic_cast<pointer>(Glib::wrap_auto(cobj, false /* take_copy */)));
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#else
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//We really do need to use dynamic_cast<>, so I expect problems if this code is used. murrayc.
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return *(static_cast<pointer>(Glib::wrap_auto(cobj, false /* take_copy */)));
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#endif
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}
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return *(pointer)glibmm_null_pointer;
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}
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pointer operator->() const { return &operator*(); }
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Self& operator++()
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{
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if (!node_)
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node_ = g_list_first(*head_);
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else
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node_ = (GList *)g_list_next(node_);
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return *this;
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}
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Self operator++(int)
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{
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Self tmp = *this;
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++*this;
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return tmp;
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}
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Self& operator--()
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{
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if (!node_)
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node_ = g_list_last(*head_);
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else
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node_ = (GList *)g_list_previous(node_);
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return *this;
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}
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Self operator--(int)
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{
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Self tmp = *this;
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--*this;
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return tmp;
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}
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};
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template <class T_Base>
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class List_ReverseIterator: private T_Base
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{
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public:
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typedef typename T_Base::iterator_category iterator_category;
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typedef typename T_Base::size_type size_type;
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typedef typename T_Base::difference_type difference_type;
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typedef typename T_Base::value_type value_type;
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typedef typename T_Base::pointer pointer;
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typedef typename T_Base::reference reference;
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typedef List_ReverseIterator<T_Base> Self;
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bool operator==(const Self& src) const { return T_Base::operator==(src); }
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bool operator!=(const Self& src) const { return T_Base::operator!=(src); }
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List_ReverseIterator(GList* const& head, GList* node)
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: T_Base(head, node)
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{}
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List_ReverseIterator()
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: T_Base()
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{}
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List_ReverseIterator(const Self& src)
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: T_Base(src)
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{}
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List_ReverseIterator(const T_Base& src)
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: T_Base(src)
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{ ++(*this); }
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Self& operator++() {T_Base::operator--(); return *this;}
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Self& operator--() {T_Base::operator++(); return *this;}
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Self operator++(int) {Self src = *this; T_Base::operator--(); return src;}
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Self operator--(int) {Self src = *this; T_Base::operator++(); return src;}
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reference operator*() const { return T_Base::operator*(); }
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pointer operator->() const { return T_Base::operator->(); }
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};
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template <class T_Base>
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class List_ConstIterator: public T_Base
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{
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public:
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typedef typename T_Base::iterator_category iterator_category;
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typedef typename T_Base::size_type size_type;
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typedef typename T_Base::difference_type difference_type;
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typedef const typename T_Base::value_type value_type;
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typedef const typename T_Base::pointer pointer;
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typedef const typename T_Base::reference reference;
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typedef List_ConstIterator<T_Base> Self;
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bool operator==(const Self& src) const { return T_Base::operator==(src); }
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bool operator!=(const Self& src) const { return T_Base::operator!=(src); }
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List_ConstIterator(GList* const& head, GList* node)
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: T_Base(head, node)
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{}
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List_ConstIterator()
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: T_Base()
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{}
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List_ConstIterator(const Self& src)
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: T_Base(src)
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{}
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List_ConstIterator(const T_Base& src)
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: T_Base(src)
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{}
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Self& operator++() {T_Base::operator++(); return *this;}
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Self& operator--() {T_Base::operator--(); return *this;}
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Self operator++(int) {Self src = *this; T_Base::operator++(); return src;}
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Self operator--(int) {Self src = *this; T_Base::operator--(); return src;}
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reference operator*() const { return T_Base::operator*(); }
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pointer operator->() const { return T_Base::operator->(); }
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};
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} // namespace Glib
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#endif /* DOXYGEN_SHOULD_SKIP_THIS */
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#endif /* _GLIBMM_CONTAINERS_H */
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