int center(buffer * const b) {
line_desc * const ld = b->cur_line_desc;
const int right_margin = b->opt.right_margin ? b->opt.right_margin : ne_columns;
int64_t
len,
start_pos = 0,
end_pos = ld->line_len;
while(start_pos < ld->line_len && isasciispace(ld->line[start_pos])) start_pos = next_pos(ld->line, start_pos, b->encoding);
if (start_pos == ld->line_len) return OK;
while(isasciispace(ld->line[prev_pos(ld->line, end_pos, b->encoding)])) end_pos = prev_pos(ld->line, end_pos, b->encoding);
len = b->encoding == ENC_UTF8 ? utf8strlen(&ld->line[start_pos], end_pos - start_pos) : end_pos - start_pos;
if (len >= right_margin) return OK;
b->cur_pos = -1;
start_undo_chain(b);
delete_stream(b, ld, b->cur_line, end_pos, ld->line_len - end_pos);
delete_stream(b, ld, b->cur_line, 0, start_pos);
insert_spaces(b, ld, b->cur_line, 0, (right_margin - len) / 2);
end_undo_chain(b);
return OK;
}
int undelete_line(buffer * const b) {
line_desc * const ld = b->cur_line_desc;
if (!b->last_deleted) return ERROR;
start_undo_chain(b);
if (b->cur_pos > ld->line_len)
insert_spaces(b, ld, b->cur_line, ld->line_len, b->win_x + b->cur_x - calc_width(ld, ld->line_len, b->opt.tab_size, b->encoding));
insert_one_line(b, ld, b->cur_line, b->cur_pos);
insert_stream(b, ld, b->cur_line, b->cur_pos, b->last_deleted->stream, b->last_deleted->len);
end_undo_chain(b);
return OK;
}
/**
* Read and init the current title and insert all the keywords found into the keywords vector
* @param line line where extract the title
* @param title vector where to store the words
* @param words_ignore the vector containing the words to ignore
* @param keywords the vector of keywords
*/
void read_title( const std::string& line, std::vector<std::string>& title,
const std::vector<std::string>& words_ignore, std::vector<RefTitleWord>& keywords ){
std::istringstream iss(line);
// Insert the words in the line into the current entry vector
std::string word;
insert_spaces( iss, word, title );
while ( getline( iss, word, ' ' ) ){
// Move the string read into the current title
title.push_back( std::move(word) );
// If the word is not to ignore
if ( !std::binary_search(words_ignore.begin(), words_ignore.end(), title.back()) ){
// Add a reference to this word and its title into the keywords vector
keywords.push_back( RefTitleWord(title, title.back()) );
}
// Insert spaces after the word read, except for the last word read
if ( iss.peek() != EOF ){
word = " ";
insert_spaces( iss, word, title );
}
}
}
