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#include "selection.hh"
#include "utf8.hh"
namespace Kakoune
{
void Range::merge_with(const Range& range)
{
if (m_first < m_last)
m_first = std::min(m_first, range.m_first);
if (m_first > m_last)
m_first = std::max(m_first, range.m_first);
m_last = range.m_last;
}
BufferIterator Range::begin() const
{
return std::min(m_first, m_last);
}
BufferIterator Range::end() const
{
return utf8::next(std::max(m_first, m_last));
}
Selection::Selection(const BufferIterator& first, const BufferIterator& last,
CaptureList captures)
: Range{first, last}, m_captures{std::move(captures)}
{
check_invariant();
register_with_buffer();
}
Selection::Selection(const Selection& other)
: Range(other), m_captures(other.m_captures)
{
register_with_buffer();
}
Selection::Selection(Selection&& other)
: Range{other},
m_captures{std::move(other.m_captures)}
{
register_with_buffer();
}
Selection::~Selection()
{
unregister_with_buffer();
}
Selection& Selection::operator=(const Selection& other)
{
const bool new_buffer = &first().buffer() != &other.first().buffer();
if (new_buffer)
unregister_with_buffer();
first() = other.first();
last() = other.last();
m_captures = other.m_captures;
if (new_buffer)
register_with_buffer();
return *this;
}
Selection& Selection::operator=(Selection&& other)
{
const bool new_buffer = &first().buffer() != &other.first().buffer();
if (new_buffer)
unregister_with_buffer();
first() = other.first();
last() = other.last();
m_captures = std::move(other.m_captures);
if (new_buffer)
register_with_buffer();
return *this;
}
static void avoid_eol(BufferIterator& it)
{
const auto column = it.column();
if (column != 0 and column == it.buffer().line_length(it.line()) - 1)
it = utf8::previous(it);
}
void Selection::avoid_eol()
{
Kakoune::avoid_eol(first());
Kakoune::avoid_eol(last());
}
void Selection::on_insert(const BufferIterator& begin, const BufferIterator& end)
{
first().on_insert(begin.coord(), end.coord());
last().on_insert(begin.coord(), end.coord());
check_invariant();
}
void Selection::on_erase(const BufferIterator& begin, const BufferIterator& end)
{
first().on_erase(begin.coord(), end.coord());
last().on_erase(begin.coord(), end.coord());
check_invariant();
}
void Selection::register_with_buffer()
{
first().buffer().add_change_listener(*this);
}
void Selection::unregister_with_buffer()
{
first().buffer().remove_change_listener(*this);
}
void Selection::check_invariant() const
{
assert(utf8::is_character_start(first()));
assert(utf8::is_character_start(last()));
}
}
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