std::list<Block *>::iterator ScreenData::split_out_row_from_block(std::list<Block *>::iterator it, int row_in_block)
{
int lines = (*it)->lineCount();
if (row_in_block == 0 && lines == 1)
return it;
if (row_in_block == 0) {
auto insert_before = (*it)->takeLine(0);
insert_before->setScreenIndex(row_in_block);
m_block_count++;
return m_screen_blocks.insert(it,insert_before);
} else if (row_in_block == lines -1) {
auto insert_after = (*it)->takeLine(lines -1);
insert_after->setScreenIndex(row_in_block);
++it;
m_block_count++;
return m_screen_blocks.insert(it, insert_after);
}
auto half = (*it)->split(row_in_block);
++it;
auto it_width_first = m_screen_blocks.insert(it, half);
auto the_one = half->takeLine(0);
m_block_count+=2;
return m_screen_blocks.insert(it_width_first,the_one);
}
std::string takeLine( int& lineno ){
lineno = next_line_idx;
return takeLine();
}
