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#include "display_buffer.hh"
#include "assert.hh"
namespace Kakoune
{
void DisplayAtom::trim_begin(CharCount count)
{
if (m_type == BufferRange)
m_begin = utf8::advance(m_buffer->iterator_at(m_begin),
m_buffer->iterator_at(m_end), count).coord();
else
m_text = m_text.substr(count);
check_invariant();
}
void DisplayAtom::trim_end(CharCount count)
{
if (m_type == BufferRange)
m_end = utf8::advance(m_buffer->iterator_at(m_end),
m_buffer->iterator_at(m_begin), -count).coord();
else
m_text = m_text.substr(0, m_text.char_length() - count);
check_invariant();
}
void DisplayAtom::check_invariant() const
{
#ifdef KAK_DEBUG
if (has_buffer_range())
{
kak_assert(m_buffer->is_valid(m_begin));
kak_assert(m_buffer->is_valid(m_end));
}
#endif
}
DisplayLine::DisplayLine(AtomList atoms)
: m_atoms(std::move(atoms))
{
compute_range();
}
DisplayLine::iterator DisplayLine::split(iterator it, BufferCoord pos)
{
kak_assert(it->type() == DisplayAtom::BufferRange);
kak_assert(it->begin() < pos);
kak_assert(it->end() > pos);
DisplayAtom atom = *it;
atom.m_end = pos;
it->m_begin = pos;
atom.check_invariant();
it->check_invariant();
return m_atoms.insert(it, std::move(atom));
}
DisplayLine::iterator DisplayLine::insert(iterator it, DisplayAtom atom)
{
if (atom.has_buffer_range())
{
m_range.first = std::min(m_range.first, atom.begin());
m_range.second = std::max(m_range.second, atom.end());
}
return m_atoms.insert(it, std::move(atom));
}
void DisplayLine::push_back(DisplayAtom atom)
{
if (atom.has_buffer_range())
{
m_range.first = std::min(m_range.first, atom.begin());
m_range.second = std::max(m_range.second, atom.end());
}
m_atoms.push_back(std::move(atom));
}
DisplayLine::iterator DisplayLine::erase(iterator beg, iterator end)
{
iterator res = m_atoms.erase(beg, end);
compute_range();
return res;
}
void DisplayLine::optimize()
{
if (m_atoms.empty())
return;
auto atom_it = m_atoms.begin();
auto next_atom_it = atom_it + 1;
while (next_atom_it != m_atoms.end())
{
auto& atom = *atom_it;
auto& next_atom = *next_atom_it;
bool merged = false;
if (atom.colors == next_atom.colors and
atom.attribute == next_atom.attribute and
atom.type() == next_atom.type())
{
auto type = atom.type();
if ((type == DisplayAtom::BufferRange or
type == DisplayAtom::ReplacedBufferRange) and
next_atom.begin() == atom.end())
{
atom.m_end = next_atom.end();
if (type == DisplayAtom::ReplacedBufferRange)
atom.m_text += next_atom.m_text;
merged = true;
}
if (type == DisplayAtom::Text)
{
atom.m_text += next_atom.m_text;
merged = true;
}
}
if (merged)
next_atom_it = m_atoms.erase(next_atom_it);
else
atom_it = next_atom_it++;
atom_it->check_invariant();
}
}
CharCount DisplayLine::length() const
{
CharCount len = 0;
for (auto& atom : m_atoms)
len += atom.length();
return len;
}
void DisplayLine::trim(CharCount first_char, CharCount char_count)
{
for (auto it = begin(); first_char > 0 and it != end(); )
{
if (not it->has_buffer_range())
{
++it;
continue;
}
auto len = it->length();
if (len <= first_char)
{
m_atoms.erase(it);
first_char -= len;
}
else
{
it->trim_begin(first_char);
first_char = 0;
}
}
auto it = begin();
for (; it != end() and char_count > 0; ++it)
char_count -= it->length();
if (char_count < 0)
(it-1)->trim_end(-char_count);
m_atoms.erase(it, end());
compute_range();
}
constexpr BufferRange init_range{ {INT_MAX, INT_MAX}, {INT_MIN, INT_MIN} };
void DisplayLine::compute_range()
{
m_range = init_range;
for (auto& atom : m_atoms)
{
if (not atom.has_buffer_range())
continue;
m_range.first = std::min(m_range.first, atom.begin());
m_range.second = std::max(m_range.second, atom.end());
}
if (m_range == init_range)
m_range = { { 0, 0 }, { 0, 0 } };
kak_assert(m_range.first <= m_range.second);
}
void DisplayBuffer::compute_range()
{
m_range = init_range;
for (auto& line : m_lines)
{
m_range.first = std::min(line.range().first, m_range.first);
m_range.second = std::max(line.range().second, m_range.second);
}
if (m_range == init_range)
m_range = { { 0, 0 }, { 0, 0 } };
kak_assert(m_range.first <= m_range.second);
}
void DisplayBuffer::optimize()
{
for (auto& line : m_lines)
line.optimize();
}
}
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