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// Copyright (c) 2020, Justin Bronder
// Copied and modified from: https://github.com/jsbronder/sff
// SPDX-License-Identifier: BSD-3-Clause
#include "scrollback.h"
#include <cassert>
#include <cstring>
#include <future>
namespace Terminal::Internal {
Scrollback::Line::Line(int cols, const VTermScreenCell *cells)
: m_cols(cols)
, m_cells(std::make_unique<VTermScreenCell[]>(cols))
{
memcpy(m_cells.get(), cells, cols * sizeof(cells[0]));
}
const VTermScreenCell *Scrollback::Line::cell(int i) const
{
assert(i >= 0 && i < m_cols);
return &m_cells[i];
}
Scrollback::Scrollback(size_t capacity)
: m_capacity(capacity)
{}
void Scrollback::emplace(int cols, const VTermScreenCell *cells)
{
m_deque.emplace_front(cols, cells);
while (m_deque.size() > m_capacity) {
m_deque.pop_back();
}
}
void Scrollback::popto(int cols, VTermScreenCell *cells)
{
const Line &sbl = m_deque.front();
int ncells = cols;
if (ncells > sbl.cols())
ncells = sbl.cols();
memcpy(cells, sbl.cells(), sizeof(cells[0]) * ncells);
for (size_t i = ncells; i < static_cast<size_t>(cols); ++i) {
cells[i].chars[0] = '\0';
cells[i].width = 1;
cells[i].bg = cells[ncells - 1].bg;
}
m_deque.pop_front();
}
void Scrollback::clear()
{
m_deque.clear();
}
} // namespace Terminal::Internal
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