char *request(const char *prompt, const char * const default_string, const bool alpha_allowed, const int completion_type, const bool prefer_utf8) {
set_attr(0);
input_buffer[pos = len = offset = 0] = 0;
encoding = ENC_ASCII;
x = start_x = print_prompt(prompt);
init_history();
if (default_string) {
strncpy(input_buffer, default_string, MAX_INPUT_LINE_LEN);
len = strlen(input_buffer);
encoding = detect_encoding(input_buffer, len);
input_refresh();
}
bool first_char_typed = true, last_char_completion = false, selection = false;
while(true) {
assert(input_buffer[len] == 0);
move_cursor(ne_lines - 1, x);
int c;
input_class ic;
do c = get_key_code(); while((ic = CHAR_CLASS(c)) == IGNORE);
/* ISO 10646 characters *above 256* can be added only to UTF-8 lines, or ASCII lines (making them, of course, UTF-8). */
if (ic == ALPHA && c > 0xFF && encoding != ENC_ASCII && encoding != ENC_UTF8) ic = INVALID;
if (ic != TAB) last_char_completion = false;
if (ic == TAB && !completion_type) ic = ALPHA;
switch(ic) {
case INVALID:
alert();
break;
case ALPHA:
if (first_char_typed) {
input_buffer[len = 0] = 0;
clear_to_eol();
}
if (encoding == ENC_ASCII && c > 0x7F) encoding = prefer_utf8 || c > 0xFF ? ENC_UTF8 : ENC_8_BIT;
int c_len = encoding == ENC_UTF8 ? utf8seqlen(c) : 1;
int c_width = output_width(c);
assert(c_len > 0);
if (len <= MAX_INPUT_LINE_LEN - c_len && (alpha_allowed || (c < 0x100 && isxdigit(c)) || c=='X' || c=='x')) {
memmove(&input_buffer[pos + c_len], &input_buffer[pos], len - pos + 1);
if (c_len == 1) input_buffer[pos] = c;
else utf8str(c, &input_buffer[pos]);
len += c_len;
move_cursor(ne_lines - 1, x);
if (x < ne_columns - c_width) {
if (pos == len - c_len) output_char(c, 0, encoding);
else if (char_ins_del_ok) insert_char(c, 0, encoding);
else input_refresh();
}
input_move_right(true);
}
break;
case RETURN:
selection = true;
break;
case TAB:
if (completion_type == COMPLETE_FILE || completion_type == COMPLETE_SYNTAX) {
bool quoted = false;
char *prefix, *completion, *p;
if (len && input_buffer[len - 1] == '"') {
input_buffer[len - 1] = 0;
if (prefix = strrchr(input_buffer, '"')) {
quoted = true;
prefix++;
}
else input_buffer[len - 1] = '"';
}
if (!quoted) {
prefix = strrchr(input_buffer, ' ');
if (prefix) prefix++;
else prefix = input_buffer;
}
if (last_char_completion || completion_type == COMPLETE_SYNTAX) {
if (completion_type == COMPLETE_FILE )
completion = p = request_files(prefix, true);
else
completion = p = request_syntax(prefix, true);
reset_window();
if (completion) {
if (*completion) selection = true;
else completion++;
}
}
else {
if (completion_type == COMPLETE_FILE )
completion = p = complete_filename(prefix);
else
completion = p = request_syntax(prefix, true);
last_char_completion = true;
if (!completion) alert();
}
if (completion && (prefix - input_buffer) + strlen(completion) + 1 < MAX_INPUT_LINE_LEN) {
const encoding_type completion_encoding = detect_encoding(completion, strlen(completion));
if (encoding == ENC_ASCII || completion_encoding == ENC_ASCII || encoding == completion_encoding) {
strcpy(prefix, completion);
if (quoted) strcat(prefix, "\"");
len = strlen(input_buffer);
pos = offset = 0;
x = start_x;
if (encoding == ENC_ASCII) encoding = completion_encoding;
input_move_to_eol();
if (quoted) input_move_left(false);
input_refresh();
}
else alert();
}
else if (quoted) strcat(prefix, "\"");
free(p);
}
break;
case COMMAND:
if (c < 0) c = -c - 1;
const int a = parse_command_line(key_binding[c], NULL, NULL, false);
if (a >= 0) {
switch(a) {
case LINEUP_A:
case LINEDOWN_A:
case MOVESOF_A:
case MOVEEOF_A:
case PAGEUP_A:
case PAGEDOWN_A:
case NEXTPAGE_A:
case PREVPAGE_A:
if (history_buff) {
switch(a) {
case LINEUP_A: line_up(history_buff); break;
case LINEDOWN_A: line_down(history_buff); break;
case MOVESOF_A: move_to_sof(history_buff); break;
case MOVEEOF_A: move_to_bof(history_buff); break;
case PAGEUP_A:
case PREVPAGE_A: prev_page(history_buff); break;
case PAGEDOWN_A:
case NEXTPAGE_A: next_page(history_buff); break;
}
/* In some cases, the default displayed on the command line will be the same as the
first history item. In that case we skip it. */
if (first_char_typed == true
&& a == LINEUP_A
&& history_buff->cur_line_desc->line
&& !strncmp(history_buff->cur_line_desc->line, input_buffer, history_buff->cur_line_desc->line_len))
line_up(history_buff);
if (history_buff->cur_line_desc->line) {
strncpy(input_buffer,
history_buff->cur_line_desc->line,
min(history_buff->cur_line_desc->line_len,MAX_INPUT_LINE_LEN));
input_buffer[min(history_buff->cur_line_desc->line_len,MAX_INPUT_LINE_LEN)] = 0;
len = strlen(input_buffer);
encoding = detect_encoding(input_buffer, len);
}
else {
input_buffer[len = 0] = 0;
encoding = ENC_ASCII;
}
x = start_x;
pos = 0;
offset = 0;
input_refresh();
}
break;
case MOVELEFT_A:
input_move_left(true);
break;
case MOVERIGHT_A:
input_move_right(true);
break;
case BACKSPACE_A:
if (pos == 0) break;
input_move_left(true);
case DELETECHAR_A:
if (len > 0 && pos < len) {
int c_len = encoding == ENC_UTF8 ? utf8len(input_buffer[pos]) : 1;
int c_width = get_char_width(&input_buffer[pos], encoding);
memmove(&input_buffer[pos], &input_buffer[pos + c_len], len - pos - c_len + 1);
len -= c_len;
if (input_buffer_is_ascii()) encoding = ENC_ASCII;
if (char_ins_del_ok) {
int i, j;
move_cursor(ne_lines - 1, x);
delete_chars(c_width);
for(i = x, j = pos; j < len && i + get_char_width(&input_buffer[j], encoding) < ne_columns - c_width; i += get_char_width(&input_buffer[j], encoding), j = next_pos(input_buffer, j, encoding));
if (j < len) {
move_cursor(ne_lines - 1, i);
while(j < len && i + get_char_width(&input_buffer[j], encoding) < ne_columns) {
output_char(get_char(&input_buffer[j], encoding), 0, encoding);
i += get_char_width(&input_buffer[j], encoding);
j = next_pos(input_buffer, j, encoding);
}
}
}
else input_refresh();
}
break;
case DELETELINE_A:
move_cursor(ne_lines - 1, start_x);
clear_to_eol();
input_buffer[len = pos = offset = 0] = 0;
encoding = ENC_ASCII;
x = start_x;
break;
case DELETEEOL_A:
input_buffer[len = pos] = 0;
clear_to_eol();
if (input_buffer_is_ascii()) encoding = ENC_ASCII;
break;
case MOVEINCUP_A:
if (x != start_x) {
pos = offset;
x = start_x;
break;
}
case MOVESOL_A:
input_move_to_sol();
break;
case MOVEINCDOWN_A: {
int i, j;
for(i = x, j = pos; j < len && i + get_char_width(&input_buffer[j], encoding) < ne_columns; i += get_char_width(&input_buffer[j], encoding), j = next_pos(input_buffer, j, encoding));
if (j != pos && j < len) {
pos = j;
x = i;
break;
}
}
case MOVEEOL_A:
input_move_to_eol();
break;
case TOGGLESEOL_A:
case TOGGLESEOF_A:
if (pos != 0) input_move_to_sol();
else input_move_to_eol();
break;
case PREVWORD_A:
input_prev_word();
break;
case NEXTWORD_A:
input_next_word();
break;
case REFRESH_A:
input_refresh();
break;
case PASTE_A:
input_paste();
break;
case AUTOCOMPLETE_A:
input_autocomplete();
break;
case ESCAPE_A:
return NULL;
default:
break;
}
}
break;
default:
break;
}
if (selection) {
const line_desc * const last = (line_desc *)history_buff->line_desc_list.tail_pred->prev;
assert(input_buffer[len] == 0);
if (history_buff->num_lines == 0 || len != last->line_len || strncmp(input_buffer, last->line, last->line_len)) add_to_history(input_buffer);
return input_buffer;
}
first_char_typed = false;
}
}
int paragraph(buffer * const b) {
line_desc *ld = b->cur_line_desc, *start_line_desc = ld;
if (!ld->line) return line_down(b);
/* Establish appropriate leading space. This will be taken from the line
following the current line if it is non-blank. Otherwise it will be
taken from the current line. Save a copy of it for later as space[]. **/
if ( !( (ld->ld_node.next->next && save_space((line_desc *)ld->ld_node.next, b->opt.tab_size, b->encoding))
|| save_space(ld, b->opt.tab_size, b->encoding) )
) return line_down(b);
int64_t pos = b->cur_pos;
b->cur_pos = -1;
start_undo_chain(b);
/* This insertion and deletion of a single character ensures
that the cursor ends up here after an undo. */
int64_t line = b->cur_line;
insert_one_char(b, ld, line, 0, ' ');
delete_stream(b, ld, line, 0, 1);
const int right_margin = b->opt.right_margin ? b->opt.right_margin : ne_columns;
bool done;
do {
done = true; /* set this to false if we do any work in the loop. */
trim_trailing_space(b, ld, line, b->encoding);
/* Suck up subsequent lines until this one is long enough to need splitting */
while ((calc_width(ld, ld->line_len, b->opt.tab_size, b->encoding) <= right_margin) &&
ld->ld_node.next->next && is_part_of_paragraph((line_desc *)ld->ld_node.next, b->opt.tab_size, &pos, b->encoding)) {
line_desc *ld_next = (line_desc *)ld->ld_node.next;
insert_one_char(b, ld, line, ld->line_len, ' ');
if (pos) delete_stream(b, ld_next, line + 1, 0, pos); /* pos was set by is_part_of_paragraph() above. */
delete_stream(b, ld, line, ld->line_len, 1); /* joins next line to this one */
trim_trailing_space(b, ld, line, b->encoding);
done = false;
}
if (calc_width(ld, ld->line_len, b->opt.tab_size, b->encoding) > right_margin) {
int64_t spaces;
int64_t split_pos;
/* Skip past leading spaces... */
pos = 0;
while(pos < ld->line_len && isasciispace(ld->line[pos]))
pos = next_pos(ld->line, pos, b->encoding);
/* Find the split point */
split_pos = spaces = 0;
while (pos < ld->line_len && (calc_width(ld, pos, b->opt.tab_size, b->encoding) < right_margin || ! split_pos)) {
if (isasciispace(ld->line[pos])) {
split_pos = pos;
spaces = 0;
while (pos < ld->line_len && isasciispace(ld->line[pos])) {
pos = next_pos(ld->line, pos, b->encoding);
spaces++;
}
}
else pos = next_pos(ld->line, pos, b->encoding);
}
if (split_pos) {
done = false;
/* Remove any space at the split point. */
if (spaces) delete_stream(b, ld, line, split_pos, spaces);
/* Split the line at the split point. (We are done with this line) */
insert_one_line(b, ld, line, split_pos);
/* Make the new next line the current line **/
if (ld->ld_node.next->next) {
ld = (line_desc *)ld->ld_node.next;
line++;
if (pa_space && pa_space_len && pa_space_pos)
insert_stream(b, ld, line, 0, pa_space, pa_space_pos);
trim_trailing_space(b, ld, line, b->encoding);
}
} else { /* Line not split; is there a next one in the paragraph? */
if ( ld->ld_node.next->next && is_part_of_paragraph((line_desc *)ld->ld_node.next, b->opt.tab_size, &pos, b->encoding) ) {
ld = (line_desc *)ld->ld_node.next;
line++;
done = false;
}
}
}
} while (!stop && !done);
end_undo_chain(b);
if (pa_space) {
free(pa_space);
pa_space = NULL;
}
if (b->syn) {
b->attr_len = -1;
need_attr_update = true;
update_syntax_states(b, -1, start_line_desc, (line_desc *)ld->ld_node.next);
}
update_window_lines(b, b->cur_line_desc, b->cur_y, ne_lines - 2, false);
goto_line_pos(b, line, pos);
if (stop || line_down(b) == ERROR) return stop ? STOPPED : ERROR;
/* Try to find the first non-blank starting with this line. */
ld = b->cur_line_desc;
line = b->cur_line;
do {
if (ld->line) {
for (pos = 0; pos < ld->line_len; pos = next_pos(ld->line, pos, b->encoding)) {
if (!isasciispace(ld->line[pos])) {
goto_line_pos(b, line, pos);
return ld->ld_node.next ? OK : ERROR;
}
}
}
ld = (line_desc *)ld->ld_node.next;
line++;
} while (ld->ld_node.next);
return b->cur_line_desc->ld_node.next ? OK : ERROR;
}
