/* reset internal view data structures (cell matrix, line offsets etc.) */
static void view_clear(View *view) {
/* calculate line number of first line */
// TODO move elsewhere
view->topline = view->lines;
view->topline->lineno = text_lineno_by_pos(view->text, view->start);
view->lastline = view->topline;
/* reset all other lines */
size_t line_size = sizeof(Line) + view->width*sizeof(Cell);
size_t end = view->height * line_size;
Line *prev = NULL;
for (size_t i = 0; i < end; i += line_size) {
Line *line = (Line*)(((char*)view->lines) + i);
line->width = 0;
line->len = 0;
line->prev = prev;
if (prev)
prev->next = line;
prev = line;
}
view->bottomline = prev ? prev : view->topline;
view->bottomline->next = NULL;
view->line = view->topline;
view->col = 0;
}
static Filerange address_line_evaluate(Address *addr, File *file, Filerange *range, int sign) {
Text *txt = file->text;
size_t offset = addr->number != 0 ? addr->number : 1;
size_t start = range->start, end = range->end, line;
if (sign > 0) {
char c;
if (end > 0 && text_byte_get(txt, end-1, &c) && c == '\n')
end--;
line = text_lineno_by_pos(txt, end);
line = text_pos_by_lineno(txt, line + offset);
} else if (sign < 0) {
line = text_lineno_by_pos(txt, start);
line = offset < line ? text_pos_by_lineno(txt, line - offset) : 0;
} else {
line = text_pos_by_lineno(txt, addr->number);
}
if (addr->type == 'g')
return text_range_new(line, line);
else
return text_range_new(line, text_line_next(txt, line));
}
