drophandle_sequence.hpp

新版本TR1的stl

    /// \brief Release any resources aquired
    ~basic_drophandle_sequence() stlsoft_throw_0();

// Attributes
public:
    /// \brief The number of elements in the sequence
    ws_size_t       size() const;
    /// \brief Indicates whether the sequence is empty
    ws_bool_t       empty() const;

// Iteration
public:
    /// \brief Begins the iteration
    ///
    /// \return An iterator representing the start of the sequence
    const_iterator  begin() const;
    /// \brief Ends the iteration
    ///
    /// \return An iterator representing the end of the sequence
    const_iterator  end() const;

#if defined(STLSOFT_CF_BIDIRECTIONAL_ITERATOR_SUPPORT) && \
    !defined(STLSOFT_COMPILER_IS_BORLAND)
    /// \brief Begins the reverse iteration
    ///
    /// \return An iterator representing the start of the reverse sequence
    const_reverse_iterator  rbegin() const;
    /// \brief Ends the reverse iteration
    ///
    /// \return An iterator representing the end of the reverse sequence
    const_reverse_iterator  rend() const;
#endif /* STLSOFT_CF_BIDIRECTIONAL_ITERATOR_SUPPORT */

// Members
private:
    HDROP           m_hdrop;
    const ws_bool_t m_bOwnHandle;

// Implementation
private:

// Not to be implemented
private:
    basic_drophandle_sequence(class_type const&);
    class_type& operator =(class_type const&);
};

/* Typedefs to commonly encountered types. */
/** \brief Specialisation of the basic_drophandle_sequence template for the ANSI character type \c char
 *
 * \ingroup group__library__shell
 */
typedef basic_drophandle_sequence<ws_char_a_t, drophandle_sequence_traits<ws_char_a_t> >    drophandle_sequence_a;
/** \brief Specialisation of the basic_drophandle_sequence template for the Unicode character type \c wchar_t
 *
 * \ingroup group__library__shell
 */
typedef basic_drophandle_sequence<ws_char_w_t, drophandle_sequence_traits<ws_char_w_t> >    drophandle_sequence_w;
/** \brief Specialisation of the basic_drophandle_sequence template for the ANSI character type \c char
 *
 * \ingroup group__library__shell
 */
typedef basic_drophandle_sequence<TCHAR, drophandle_sequence_traits<TCHAR> >                drophandle_sequence;

////////////////////////////////////////////////////////////////////////////
// Operators

template<   ss_typename_param_k C
        ,   ss_typename_param_k T
        >
inline ws_bool_t operator ==(   basic_drophandle_sequence_const_iterator<C, T> const&   lhs
                            ,   basic_drophandle_sequence_const_iterator<C, T> const&   rhs)
{
    return lhs.equal(rhs);
}

template<   ss_typename_param_k C
        ,   ss_typename_param_k T
        >
inline ws_bool_t operator !=(   basic_drophandle_sequence_const_iterator<C, T> const&   lhs
                            ,   basic_drophandle_sequence_const_iterator<C, T> const&   rhs)
{
    return !lhs.equal(rhs);
}

////////////////////////////////////////////////////////////////////////////

#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION

// basic_drophandle_sequence_const_iterator

template<   ss_typename_param_k C
        ,   ss_typename_param_k T
        >
inline /* static */ ss_typename_type_k basic_drophandle_sequence_const_iterator<C, T>::index_type basic_drophandle_sequence_const_iterator<C, T>::sentinel_()
{
    return 0x7fffffff;
}

template<   ss_typename_param_k C
        ,   ss_typename_param_k T
        >
inline /* ss_explicit_k */ basic_drophandle_sequence_const_iterator<C, T>::basic_drophandle_sequence_const_iterator(HDROP hdrop, ss_typename_type_k basic_drophandle_sequence_const_iterator<C, T>::index_type index)
    : m_hdrop(hdrop)
    , m_index(index)
{}

template<   ss_typename_param_k C
        ,   ss_typename_param_k T
        >
inline basic_drophandle_sequence_const_iterator<C, T>::basic_drophandle_sequence_const_iterator()
    : m_hdrop(0)
    , m_index(sentinel_())
{}

template<   ss_typename_param_k C
        ,   ss_typename_param_k T
        >
inline basic_drophandle_sequence_const_iterator<C, T>::basic_drophandle_sequence_const_iterator(ss_typename_type_k basic_drophandle_sequence_const_iterator<C, T>::class_type const& rhs)
    : m_hdrop(rhs.m_hdrop)
    , m_index(rhs.m_index)
{}

template<   ss_typename_param_k C
        ,   ss_typename_param_k T
        >
inline ss_typename_type_k basic_drophandle_sequence_const_iterator<C, T>::class_type &basic_drophandle_sequence_const_iterator<C, T>::operator =(ss_typename_type_k basic_drophandle_sequence_const_iterator<C, T>::class_type const& rhs)
{
    m_hdrop = rhs.m_hdrop;
    m_index = rhs.m_index;

    return *this;
}

template<   ss_typename_param_k C
        ,   ss_typename_param_k T
        >
inline ss_typename_type_k basic_drophandle_sequence_const_iterator<C, T>::class_type &basic_drophandle_sequence_const_iterator<C, T>::operator ++()
{
    WINSTL_MESSAGE_ASSERT("Incrementing the end iterator", m_index != sentinel_());

    char_type   ch;
    ws_uint_t   res =   traits_type::drag_query_file(m_hdrop, static_cast<ws_uint_t>(m_index + 1), &ch, 1);

    if(res == 0)
    {
        // Failed, so become 'end'
        m_index = sentinel_();
    }
    else
    {
        // Fine, so increment to next
        ++m_index;
    }

    return *this;
}

template<   ss_typename_param_k C
        ,   ss_typename_param_k T
        >
inline ss_typename_type_k basic_drophandle_sequence_const_iterator<C, T>::class_type &basic_drophandle_sequence_const_iterator<C, T>::operator --()
{
    // If currently at 'end' ....
    if(m_index == sentinel_())
    {
        // ... then determine the new end ...
        m_index = static_cast<index_type>(traits_type::drag_query_file(m_hdrop, 0xFFFFFFFF, NULL, 0));

        if(m_index == 0xFFFFFFFF)
        {
            // ... failed. Must set to end again!
            m_index = sentinel_();
        }
        else
        {
            // ... decrement from end
            --m_index;
        }
    }
    else
    {
        // ... decrement from current position
        --m_index;
    }

    return *this;
}

template<   ss_typename_param_k C
        ,   ss_typename_param_k T
        >
inline ss_typename_type_k basic_drophandle_sequence_const_iterator<C, T>::class_type basic_drophandle_sequence_const_iterator<C, T>::operator ++(int)
{
    class_type  ret(*this);

    operator ++();

    return ret;
}

template<   ss_typename_param_k C
        ,   ss_typename_param_k T
        >
inline ss_typename_type_k basic_drophandle_sequence_const_iterator<C, T>::class_type basic_drophandle_sequence_const_iterator<C, T>::operator --(int)
{
    class_type  ret(*this);

    operator --();

    return ret;
}

template<   ss_typename_param_k C
        ,   ss_typename_param_k T
        >
inline const ss_typename_type_k basic_drophandle_sequence_const_iterator<C, T>::value_type basic_drophandle_sequence_const_iterator<C, T>::operator *() const
{
    WINSTL_MESSAGE_ASSERT("Dereferencing the end iterator", m_index != sentinel_());

    ws_uint_t                               cch =   traits_type::drag_query_file(m_hdrop, static_cast<ws_uint_t>(m_index), NULL, 0);
    stlsoft_ns_qual(auto_buffer)<char_type> sz(1 + cch);

    if( 0 == sz.size() ||
        0 == (cch = traits_type::drag_query_file(m_hdrop, static_cast<ws_uint_t>(m_index), &sz[0], sz.size())))
    {
        sz[0] = '\0';
    }

    return value_type(sz.data());
}

template<   ss_typename_param_k C
        ,   ss_typename_param_k T
        >
inline ws_bool_t basic_drophandle_sequence_const_iterator<C, T>::equal(ss_typename_type_k basic_drophandle_sequence_const_iterator<C, T>::class_type const& rhs) const
{
    WINSTL_MESSAGE_ASSERT("Comparing iterators from different sequences", m_hdrop == NULL || rhs.m_hdrop == NULL || rhs.m_hdrop);

    return m_index == rhs.m_index;
}

// basic_drophandle_sequence

template <ss_typename_param_k C, ss_typename_param_k T>
inline basic_drophandle_sequence<C, T>::basic_drophandle_sequence(HDROP hdrop, ws_bool_t bOwnHandle /* = true */)
    : m_hdrop(hdrop)
    , m_bOwnHandle(bOwnHandle)
{}

template <ss_typename_param_k C, ss_typename_param_k T>
inline basic_drophandle_sequence<C, T>::~basic_drophandle_sequence() stlsoft_throw_0()
{
    if(m_bOwnHandle)
    {
        ::DragFinish(m_hdrop);
    }
}

template <ss_typename_param_k C, ss_typename_param_k T>
inline ws_size_t basic_drophandle_sequence<C, T>::size() const
{
    return traits_type::drag_query_file(m_hdrop, static_cast<ws_uint_t>(-1), 0, 0);
}

template <ss_typename_param_k C, ss_typename_param_k T>
inline ws_bool_t basic_drophandle_sequence<C, T>::empty() const
{
    return size() == 0;
}

template <ss_typename_param_k C, ss_typename_param_k T>
inline ss_typename_type_k basic_drophandle_sequence<C, T>::const_iterator basic_drophandle_sequence<C, T>::begin() const
{
    char_type   ch;
    ws_uint_t   res =   traits_type::drag_query_file(m_hdrop, 0, &ch, 1);

    return const_iterator(m_hdrop, (res == 0) ? const_iterator::sentinel_() : 0);
}

template <ss_typename_param_k C, ss_typename_param_k T>
inline ss_typename_type_k basic_drophandle_sequence<C, T>::const_iterator basic_drophandle_sequence<C, T>::end() const
{
    return const_iterator(m_hdrop, const_iterator::sentinel_());
}

#if defined(STLSOFT_CF_BIDIRECTIONAL_ITERATOR_SUPPORT) && \
    !defined(STLSOFT_COMPILER_IS_BORLAND)
template <ss_typename_param_k C, ss_typename_param_k T>
inline ss_typename_type_k basic_drophandle_sequence<C, T>::const_reverse_iterator basic_drophandle_sequence<C, T>::rbegin() const
{
    return const_reverse_iterator(end());
}

template <ss_typename_param_k C, ss_typename_param_k T>
inline ss_typename_type_k basic_drophandle_sequence<C, T>::const_reverse_iterator basic_drophandle_sequence<C, T>::rend() const
{
    return const_reverse_iterator(begin());
}
#endif /* STLSOFT_CF_BIDIRECTIONAL_ITERATOR_SUPPORT */

#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */

////////////////////////////////////////////////////////////////////////////
// Unit-testing

#ifdef STLSOFT_UNITTEST
# include "./unittest/drophandle_sequence_unittest_.h"
#endif /* STLSOFT_UNITTEST */

/* ////////////////////////////////////////////////////////////////////// */

#ifndef _WINSTL_NO_NAMESPACE
# if defined(_STLSOFT_NO_NAMESPACE) || \
     defined(STLSOFT_DOCUMENTATION_SKIP_SECTION)
} // namespace winstl
# else
} // namespace winstl_project
} // namespace stlsoft
# endif /* _STLSOFT_NO_NAMESPACE */
#endif /* !_WINSTL_NO_NAMESPACE */

/* ////////////////////////////////////////////////////////////////////// */

#endif /* WINSTL_INCL_WINSTL_SHELL_HPP_DROPHANDLE_SEQUENCE */

/* ////////////////////////////////////////////////////////////////////// */