return 1;
}
-
-/* Like xplustabs, but for a specific index of a specific filestruct */
-int xpt(const filestruct *fileptr, int index)
-{
- int i, tabs = 0;
-
- if (fileptr == NULL || fileptr->data == NULL)
- return 0;
-
- for (i = 0; i < index && fileptr->data[i] != 0; i++) {
- tabs++;
-
- if (fileptr->data[i] == NANO_CONTROL_I) {
- if (tabs % tabsize == 0);
- else
- tabs += tabsize - (tabs % tabsize);
- } else if (is_cntrl_char((int)fileptr->data[i]))
- tabs++;
- else if (fileptr->data[i] & 0x80)
- /* Make 8 bit chars only 1 column! */
- ;
- }
-
- return tabs;
-}
-
/* Return the placewewant associated with current_x. That is, xplustabs
* is the zero-based column position of the cursor. Value is no smaller
* than current_x. */
}
}
-/* And so start the display update routines. Given a column, this
- * returns the "page" it is on. "page", in the case of the display
- * columns, means which set of 80 characters is viewable (e.g. page 1
- * shows from 1 to COLS). */
-int get_page_from_virtual(int virtual)
-{
- int page = 2;
-
- if (virtual <= COLS - 2)
- return 1;
- virtual -= (COLS - 2);
-
- while (virtual > COLS - 2 - 7) {
- virtual -= (COLS - 2 - 7);
- page++;
- }
-
- return page;
-}
+/* And so start the display update routines. */
-/* The inverse of the above function */
-int get_page_start_virtual(int page)
+#ifndef NDEBUG
+int check_linenumbers(const filestruct *fileptr)
{
- int virtual;
- virtual = --page * (COLS - 7);
- if (page)
- virtual -= 2 * page - 1;
- return virtual;
-}
+ int check_line = 0;
+ const filestruct *filetmp;
-int get_page_end_virtual(int page)
-{
- return get_page_start_virtual(page) + COLS - 1;
+ for (filetmp = edittop; filetmp != fileptr; filetmp = filetmp->next)
+ check_line++;
+ return check_line;
}
+#endif
+ /* nano scrolls horizontally within a line in chunks. This function
+ * returns the column number of the first character displayed in the
+ * window when the cursor is at the given column. */
int get_page_start(int column)
{
assert(COLS > 9);
wmove(edit, current_y, x - get_page_start(x));
}
-#ifndef NANO_SMALL
-/* This takes care of the case where there is a mark that covers only
- * the current line. It expects a line with no tab characters (i.e.
- * the type that edit_add() deals with. */
-void add_marked_sameline(int begin, int end, filestruct *fileptr, int y,
- int virt_cur_x, int this_page)
-{
- /*
- * The general idea is to break the line up into 3 sections: before
- * the mark, the mark, and after the mark. We then paint each in
- * turn (for those that are currently visible, of course)
- *
- * 3 start points: 0 -> begin, begin->end, end->strlen(data)
- * in data : pre sel post
- */
- int this_page_start = get_page_start_virtual(this_page),
- this_page_end = get_page_end_virtual(this_page);
-
- /* likewise, 3 data lengths */
- int pre_data_len = begin, sel_data_len = end - begin, post_data_len = 0; /* Determined from the other two */
-
- /* now fix the start locations & lengths according to the cursor's
- * position (i.e.: our page) */
- if (pre_data_len < this_page_start)
- pre_data_len = 0;
- else
- pre_data_len -= this_page_start;
-
- if (begin < this_page_start)
- begin = this_page_start;
-
- if (end < this_page_start)
- end = this_page_start;
-
- if (begin > this_page_end)
- begin = this_page_end;
-
- if (end > this_page_end)
- end = this_page_end;
-
- /* Now calculate the lengths */
- sel_data_len = end - begin;
- post_data_len = this_page_end - end;
-
- wattron(edit, A_REVERSE);
- mvwaddnstr(edit, y, begin - this_page_start,
- &fileptr->data[begin], sel_data_len);
-
- wattroff(edit, A_REVERSE);
-
-}
-#endif
-
/* edit_add() takes care of the job of actually painting a line into
* the edit window. Called only from update_line(). Expects a
* converted-to-not-have-tabs line. */
-void edit_add(filestruct *fileptr, int yval, int start, int virt_cur_x,
- int virt_mark_beginx, int this_page)
+void edit_add(const filestruct *fileptr, int yval, int start
+#ifndef NANO_SMALL
+ , int virt_mark_beginx, int virt_cur_x
+#endif
+ )
{
-
-#ifdef ENABLE_COLOR
- const colortype *tmpcolor = NULL;
- int k, paintlen;
- filestruct *e, *s;
- regoff_t ematch, smatch;
+#ifdef DEBUG
+ fprintf(stderr, "Painting line %d, current is %d\n", fileptr->lineno,
+ current->lineno);
#endif
/* Just paint the string in any case (we'll add color or reverse on
just the text that needs it */
- mvwaddnstr(edit, yval, 0, &fileptr->data[start],
- get_page_end_virtual(this_page) - start + 1);
+ mvwaddnstr(edit, yval, 0, &fileptr->data[start], COLS);
#ifdef ENABLE_COLOR
- if (colorstrings != NULL)
- for (tmpcolor = colorstrings; tmpcolor != NULL;
- tmpcolor = tmpcolor->next) {
-
+ if (colorstrings != NULL) {
+ const colortype *tmpcolor = colorstrings;
+
+ for (; tmpcolor != NULL; tmpcolor = tmpcolor->next) {
+ int x_start;
+ /* Starting column for mvwaddnstr. Zero-based. */
+ int paintlen;
+ /* number of chars to paint on this line. There are COLS
+ * characters on a whole line. */
+ regex_t start_regexp; /* Compiled search regexp */
+ regmatch_t startmatch; /* match position for start_regexp*/
+ regmatch_t endmatch; /* match position for end_regexp*/
+
+ regcomp(&start_regexp, tmpcolor->start, REG_EXTENDED);
+
+ if (tmpcolor->bright)
+ wattron(edit, A_BOLD);
+ wattron(edit, COLOR_PAIR(tmpcolor->pairnum));
+ /* Two notes about regexec. Return value 0 means there is a
+ * match. Also, rm_eo is the first non-matching character
+ * after the match. */
+
+ /* First case, tmpcolor is a single-line expression. */
if (tmpcolor->end == NULL) {
-
- /* First, highlight all single-line regexes */
- k = start;
- regcomp(&color_regexp, tmpcolor->start, REG_EXTENDED);
- while (!regexec(&color_regexp, &fileptr->data[k], 1,
- colormatches, 0)) {
-
- if (colormatches[0].rm_eo - colormatches[0].rm_so < 1) {
- statusbar(_("Refusing 0 length regex match"));
+ size_t k = 0;
+
+ /* We increment k by rm_eo, to move past the end of the
+ last match. Even though two matches may overlap, we
+ want to ignore them, so that we can highlight C-strings
+ correctly. */
+ while (k < start + COLS) {
+ /* Note the fifth parameter to regexec. It says not to
+ * match the beginning-of-line character unless
+ * k == 0. If regexec returns non-zero, there are
+ * no more matches in the line. */
+ if (regexec(&start_regexp, &fileptr->data[k], 1,
+ &startmatch, k == 0 ? 0 : REG_NOTBOL))
break;
- }
-#ifdef DEBUG
- fprintf(stderr, _("Match! (%d chars) \"%s\"\n"),
- colormatches[0].rm_eo - colormatches[0].rm_so,
- &fileptr->data[k + colormatches[0].rm_so]);
-#endif
- if (colormatches[0].rm_so < COLS - 1) {
- if (tmpcolor->bright)
- wattron(edit, A_BOLD);
- wattron(edit, COLOR_PAIR(tmpcolor->pairnum));
-
- if (colormatches[0].rm_eo + k <= COLS) {
- paintlen =
- colormatches[0].rm_eo - colormatches[0].rm_so;
-#ifdef DEBUG
- fprintf(stderr, _("paintlen (%d) = eo (%d) - so (%d)\n"),
- paintlen, colormatches[0].rm_eo, colormatches[0].rm_so);
-#endif
-
- }
- else {
- paintlen = COLS - k - colormatches[0].rm_so - 1;
-#ifdef DEBUG
- fprintf(stderr, _("paintlen (%d) = COLS (%d) - k (%d), - rm.so (%d) - 1\n"),
- paintlen, COLS, k, colormatches[0].rm_so);
-#endif
- }
-
- mvwaddnstr(edit, yval, colormatches[0].rm_so + k,
- &fileptr->data[k + colormatches[0].rm_so],
- paintlen);
-
- }
-
- if (tmpcolor->bright)
- wattroff(edit, A_BOLD);
- wattroff(edit, COLOR_PAIR(tmpcolor->pairnum));
-
- k += colormatches[0].rm_eo;
-
+ /* Translate the match to the beginning of the line. */
+ startmatch.rm_so += k;
+ startmatch.rm_eo += k;
+ if (startmatch.rm_so == startmatch.rm_eo)
+ statusbar(_("Refusing 0 length regex match"));
+ else if (startmatch.rm_so < start + COLS &&
+ startmatch.rm_eo > start) {
+ x_start = startmatch.rm_so - start;
+ if (x_start < 0)
+ x_start = 0;
+ paintlen = startmatch.rm_eo - start - x_start;
+ if (paintlen > COLS - x_start)
+ paintlen = COLS - x_start;
+
+ assert(0 <= x_start && 0 < paintlen &&
+ x_start + paintlen <= COLS);
+ mvwaddnstr(edit, yval, x_start,
+ fileptr->data + start + x_start, paintlen);
+ }
+ k = startmatch.rm_eo;
}
- regfree(&color_regexp);
-
- }
- /* Now, if there's an 'end' somewhere below, and a 'start'
- somewhere above, things get really fun. We have to look
- down for an end, make sure there's not a start before
- the end after us, and then look up for a start,
- and see if there's an end after the start, before us :) */
- else {
-
- s = fileptr;
- while (s != NULL) {
- regcomp(&color_regexp, tmpcolor->start, REG_EXTENDED);
- if (!regexec
- (&color_regexp, s->data, 1, colormatches, 0)) {
- regfree(&color_regexp);
+ } else {
+ /* This is a multi-line regexp. There are two steps.
+ * First, we have to see if the beginning of the line is
+ * colored by a start on an earlier line, and an end on
+ * this line or later.
+ *
+ * We find the first line before fileptr matching the
+ * start. If every match on that line is followed by an
+ * end, then go to step two. Otherwise, find the next line
+ * after start_line matching the end. If that line is not
+ * before fileptr, then paint the beginning of this line. */
+
+ regex_t end_regexp; /* Compiled search regexp */
+ const filestruct *start_line = fileptr->prev;
+ /* the first line before fileptr matching start*/
+ regoff_t start_col;
+ /* where it starts in that line */
+ const filestruct *end_line;
+ int searched_later_lines = 0;
+ /* Used in step 2. Have we looked for an end on
+ * lines after fileptr? */
+
+ regcomp(&end_regexp, tmpcolor->end, REG_EXTENDED);
+
+ while (start_line != NULL &&
+ regexec(&start_regexp, start_line->data, 1,
+ &startmatch, 0)) {
+ /* If there is an end on this line, there is no need
+ * to look for starts on earlier lines. */
+ if (!regexec(&end_regexp, start_line->data, 1,
+ &endmatch, 0))
+ goto step_two;
+ start_line = start_line->prev;
+ }
+ /* No start found, so skip to the next step. */
+ if (start_line == NULL)
+ goto step_two;
+ /* Now start_line is the first line before fileptr
+ * containing a start match. Is there a start on this
+ * line not followed by an end on this line? */
+
+ start_col = 0;
+ while (1) {
+ start_col += startmatch.rm_so;
+ startmatch.rm_eo -= startmatch.rm_so;
+ if (regexec(&end_regexp,
+ start_line->data + start_col + startmatch.rm_eo,
+ 1, &endmatch,
+ start_col + startmatch.rm_eo == 0 ? 0 : REG_NOTBOL))
+ /* No end found after this start */
break;
- }
- s = s->prev;
- regfree(&color_regexp);
+ start_col++;
+ if (regexec(&start_regexp,
+ start_line->data + start_col, 1, &startmatch,
+ REG_NOTBOL))
+ /* No later start on this line. */
+ goto step_two;
}
-
- if (s != NULL) {
- /* We found a start, mark it */
- smatch = colormatches[0].rm_so;
-
- e = s;
- while (e != NULL && e != fileptr) {
- regcomp(&color_regexp, tmpcolor->end, REG_EXTENDED);
- if (!regexec
- (&color_regexp, e->data, 1, colormatches, 0)) {
- regfree(&color_regexp);
- break;
- }
- e = e->next;
- regfree(&color_regexp);
+ /* Indeed, there is a start not followed on this line by an
+ * end. */
+
+ /* We have already checked that there is no end before
+ * fileptr and after the start. Is there an end after
+ * the start at all? We don't paint unterminated starts. */
+ end_line = fileptr;
+ while (end_line != NULL &&
+ regexec(&end_regexp, end_line->data, 1,
+ &endmatch, 0))
+ end_line = end_line->next;
+
+ /* No end found, or it is too early. */
+ if (end_line == NULL ||
+ end_line->lineno < fileptr->lineno ||
+ (end_line == fileptr && endmatch.rm_eo <= start))
+ goto step_two;
+
+ /* Now paint the start of fileptr. */
+ paintlen = end_line != fileptr
+ ? COLS : endmatch.rm_eo - start;
+ if (paintlen > COLS)
+ paintlen = COLS;
+
+ assert(0 < paintlen && paintlen <= COLS);
+ mvwaddnstr(edit, yval, 0, fileptr->data + start, paintlen);
+
+ /* We have already painted the whole line. */
+ if (paintlen == COLS)
+ goto skip_step_two;
+
+
+ step_two: /* Second step, we look for starts on this line. */
+ start_col = 0;
+ while (start_col < start + COLS) {
+ if (regexec(&start_regexp, fileptr->data + start_col, 1,
+ &startmatch, start_col == 0 ? 0 : REG_NOTBOL)
+ || start_col + startmatch.rm_so >= start + COLS)
+ /* No more starts on this line. */
+ break;
+ /* Translate the match to be relative to the
+ * beginning of the line. */
+ startmatch.rm_so += start_col;
+ startmatch.rm_eo += start_col;
+
+ x_start = startmatch.rm_so - start;
+ if (x_start < 0) {
+ x_start = 0;
+ startmatch.rm_so = start;
}
-
- if (e != fileptr)
- continue; /* There's an end before us */
- else { /* Keep looking for an end */
- while (e != NULL) {
- regcomp(&color_regexp, tmpcolor->end, REG_EXTENDED);
- if (!regexec
- (&color_regexp, e->data, 1, colormatches,
- 0)) {
- regfree(&color_regexp);
- break;
- }
- e = e->next;
- regfree(&color_regexp);
+ if (!regexec(&end_regexp, fileptr->data + startmatch.rm_eo,
+ 1, &endmatch,
+ startmatch.rm_eo == 0 ? 0 : REG_NOTBOL)) {
+ /* Translate the end match to be relative to the
+ beginning of the line. */
+ endmatch.rm_so += startmatch.rm_eo;
+ endmatch.rm_eo += startmatch.rm_eo;
+ /* There is an end on this line. But does it
+ appear on this page, and is the match more than
+ zero characters long? */
+ if (endmatch.rm_eo > start &&
+ endmatch.rm_eo > startmatch.rm_so) {
+ paintlen = endmatch.rm_eo - start - x_start;
+ if (x_start + paintlen > COLS)
+ paintlen = COLS - x_start;
+
+ assert(0 <= x_start && 0 < paintlen &&
+ x_start + paintlen <= COLS);
+ mvwaddnstr(edit, yval, x_start,
+ fileptr->data + start + x_start, paintlen);
}
-
- if (e == NULL)
- continue; /* There's no start before the end :) */
- else { /* Okay, we found an end, mark it! */
- ematch = colormatches[0].rm_eo;
-
- while (e != NULL) {
- regcomp(&color_regexp, tmpcolor->end, REG_EXTENDED);
- if (!regexec
- (&color_regexp, e->data, 1,
- colormatches, 0)) {
- regfree(&color_regexp);
- break;
- } e = e->next;
- regfree(&color_regexp);
- }
-
- if (e == NULL)
- continue; /* No end, oh well :) */
-
- /* Didn't find another end, we must be in the
- middle of a highlighted bit */
-
- if (tmpcolor->bright)
- wattron(edit, A_BOLD);
-
- wattron(edit, COLOR_PAIR(tmpcolor->pairnum));
-
- if (s == fileptr && e == fileptr && ematch < COLS) {
- mvwaddnstr(edit, yval, start + smatch,
- &fileptr->data[start + smatch],
- ematch - smatch);
-#ifdef DEBUG
- fprintf(stderr, _("start = %d, smatch = %d, ematch = %d\n"), start,
- smatch, ematch);
-#endif
-
- } else if (s == fileptr)
- mvwaddnstr(edit, yval, start + smatch,
- &fileptr->data[start + smatch],
- COLS - smatch);
- else if (e == fileptr)
- mvwaddnstr(edit, yval, start,
- &fileptr->data[start],
- COLS - start);
- else
- mvwaddnstr(edit, yval, start,
- &fileptr->data[start],
- COLS);
-
- if (tmpcolor->bright)
- wattroff(edit, A_BOLD);
-
- wattroff(edit, COLOR_PAIR(tmpcolor->pairnum));
-
+ } else if (!searched_later_lines) {
+ searched_later_lines = 1;
+ /* There is no end on this line. But we haven't
+ * yet looked for one on later lines. */
+ end_line = fileptr->next;
+ while (end_line != NULL &&
+ regexec(&end_regexp, end_line->data, 1,
+ &endmatch, 0))
+ end_line = end_line->next;
+ if (end_line != NULL) {
+ assert(0 <= x_start && x_start < COLS);
+ mvwaddnstr(edit, yval, x_start,
+ fileptr->data + start + x_start,
+ COLS - x_start);
+ /* We painted to the end of the line, so
+ * don't bother checking any more starts. */
+ break;
}
-
}
+ start_col = startmatch.rm_so + 1;
+ } /* while start_col < start + COLS */
- /* Else go to the next string, yahoo! =) */
- }
-
- }
-
- }
+ skip_step_two:
+ regfree(&end_regexp);
+ } /* if (tmp_color->end != NULL) */
+ regfree(&start_regexp);
+ wattroff(edit, A_BOLD);
+ wattroff(edit, COLOR_PAIR(tmpcolor->pairnum));
+ } /* for tmpcolor in colorstrings */
+ }
#endif /* ENABLE_COLOR */
-#ifndef NANO_SMALL
- /* There are quite a few cases that could take place; we'll deal
- * with them each in turn */
- if (ISSET(MARK_ISSET) &&
- !((fileptr->lineno > mark_beginbuf->lineno
- && fileptr->lineno > current->lineno)
- || (fileptr->lineno < mark_beginbuf->lineno
- && fileptr->lineno < current->lineno))) {
- /* If we get here we are on a line that is at least
- * partially selected. The lineno checks above determined
- * that */
- if (fileptr != mark_beginbuf && fileptr != current) {
- /* We are on a completely marked line, paint it all
- * inverse */
+#ifndef NANO_SMALL
+ if (ISSET(MARK_ISSET)
+ && (fileptr->lineno <= mark_beginbuf->lineno
+ || fileptr->lineno <= current->lineno)
+ && (fileptr->lineno >= mark_beginbuf->lineno
+ || fileptr->lineno >= current->lineno)) {
+ /* fileptr is at least partially selected. */
+
+ int x_start;
+ /* Starting column for mvwaddnstr. Zero-based. */
+ int paintlen;
+ /* number of chars to paint on this line. There are COLS
+ * characters on a whole line. */
+
+ if (mark_beginbuf == fileptr && current == fileptr) {
+ x_start = virt_mark_beginx < virt_cur_x ? virt_mark_beginx
+ : virt_cur_x;
+ paintlen = abs(virt_mark_beginx - virt_cur_x);
+ } else {
+ if (mark_beginbuf->lineno < fileptr->lineno ||
+ current->lineno < fileptr->lineno)
+ x_start = 0;
+ else
+ x_start = mark_beginbuf == fileptr ? virt_mark_beginx
+ : virt_cur_x;
+ if (mark_beginbuf->lineno > fileptr->lineno ||
+ current->lineno > fileptr->lineno)
+ paintlen = start + COLS;
+ else
+ paintlen = mark_beginbuf == fileptr ? virt_mark_beginx
+ : virt_cur_x;
+ }
+ x_start -= start;
+ if (x_start < 0) {
+ paintlen += x_start;
+ x_start = 0;
+ }
+ if (x_start + paintlen > COLS)
+ paintlen = COLS - x_start;
+ if (paintlen > 0) {
wattron(edit, A_REVERSE);
-
- mvwaddnstr(edit, yval, 0, fileptr->data, COLS);
-
+ assert(x_start >= 0 && paintlen > 0 && x_start + paintlen <= COLS);
+ mvwaddnstr(edit, yval, x_start,
+ fileptr->data + start + x_start, paintlen);
wattroff(edit, A_REVERSE);
-
- } else if (fileptr == mark_beginbuf && fileptr == current) {
- /* Special case, we're still on the same line we started
- * marking -- so we call our helper function */
- if (virt_cur_x < virt_mark_beginx) {
- /* To the right of us is marked */
- add_marked_sameline(virt_cur_x, virt_mark_beginx,
- fileptr, yval, virt_cur_x, this_page);
- } else {
- /* To the left of us is marked */
- add_marked_sameline(virt_mark_beginx, virt_cur_x,
- fileptr, yval, virt_cur_x, this_page);
- }
- } else if (fileptr == mark_beginbuf) {
- /*
- * We're updating the line that was first marked,
- * but we're not currently on it. So we want to
- * figure out which half to invert based on our
- * relative line numbers.
- *
- * I.e. if we're above the "beginbuf" line, we want to
- * mark the left side. Otherwise, we're below, so we
- * mark the right.
- */
- int target;
-
- if (mark_beginbuf->lineno > current->lineno) {
-
- wattron(edit, A_REVERSE);
-
- target =
- (virt_mark_beginx <
- COLS - 1) ? virt_mark_beginx : COLS - 1;
-
- mvwaddnstr(edit, yval, 0, fileptr->data, target);
-
- wattroff(edit, A_REVERSE);
-
- }
-
- if (mark_beginbuf->lineno < current->lineno) {
-
- wattron(edit, A_REVERSE);
- target = (COLS - 1) - virt_mark_beginx;
-
- if (target < 0)
- target = 0;
-
- mvwaddnstr(edit, yval, virt_mark_beginx,
- &fileptr->data[virt_mark_beginx], target);
-
- wattroff(edit, A_REVERSE);
- }
-
- } else if (fileptr == current) {
- /* We're on the cursor's line, but it's not the first
- * one we marked. Similar to the previous logic. */
- int this_page_start = get_page_start_virtual(this_page),
- this_page_end = get_page_end_virtual(this_page);
-
- if (mark_beginbuf->lineno < current->lineno) {
-
- wattron(edit, A_REVERSE);
-
- if (virt_cur_x > COLS - 2) {
- mvwaddnstr(edit, yval, 0,
- &fileptr->data[this_page_start],
- virt_cur_x - this_page_start);
- } else
- mvwaddnstr(edit, yval, 0, fileptr->data, virt_cur_x);
-
- wattroff(edit, A_REVERSE);
-
- }
-
- if (mark_beginbuf->lineno > current->lineno) {
-
- wattron(edit, A_REVERSE);
- if (virt_cur_x > COLS - 2)
- mvwaddnstr(edit, yval, virt_cur_x - this_page_start,
- &fileptr->data[virt_cur_x],
- this_page_end - virt_cur_x);
- else
- mvwaddnstr(edit, yval, virt_cur_x,
- &fileptr->data[virt_cur_x],
- COLS - virt_cur_x);
-
- wattroff(edit, A_REVERSE);
-
- }
}
}
-#endif
-
+#endif /* !NANO_SMALL */
}
-/*
- * Just update one line in the edit buffer. Basically a wrapper for
- * edit_add(). index gives us a place in the string to update starting
- * from. Likely args are current_x or 0.
- */
+/* Just update one line in the edit buffer. Basically a wrapper for
+ * edit_add(). If fileptr != current, then index is considered 0.
+ * The line will be displayed starting with fileptr->data[index].
+ * Likely args are current_x or 0. */
void update_line(filestruct *fileptr, int index)
{
- filestruct *filetmp;
- int line = 0, col = 0;
- int virt_cur_x = current_x, virt_mark_beginx = mark_beginx;
- char *realdata, *tmp;
- int i, pos, len, page;
+ int line;
+ /* line in the edit window for CURSES calls */
+#ifndef NANO_SMALL
+ int virt_cur_x;
+ int virt_mark_beginx;
+#endif
+ char *original;
+ /* The original string fileptr->data. */
+ char *converted;
+ /* fileptr->data converted to have tabs and control characters
+ * expanded. */
+ size_t pos;
+ size_t page_start;
if (!fileptr)
return;
- /* First, blank out the line (at a minimum) */
- for (filetmp = edittop; filetmp != fileptr && filetmp != editbot;
- filetmp = filetmp->next)
- line++;
+ line = fileptr->lineno - edittop->lineno;
- mvwaddstr(edit, line, 0, hblank);
+ /* We assume the line numbers are valid. Is that really true? */
+ assert(line < 0 || line == check_linenumbers(fileptr));
+
+ if (line < 0 || line >= editwinrows)
+ return;
- /* Next, convert all the tabs to spaces, so everything else is easy */
- index = xpt(fileptr, index);
+ /* First, blank out the line (at a minimum) */
+ mvwaddstr(edit, line, 0, hblank);
- realdata = fileptr->data;
- len = strlen(realdata);
- fileptr->data = charalloc(xpt(fileptr, len) + 1);
+ original = fileptr->data;
+ converted = charalloc(strlenpt(original) + 1);
+
+ /* Next, convert all the tabs to spaces, so everything else is easy.
+ * Note the internal speller sends us index == -1. */
+ index = fileptr == current && index > 0 ? strnlenpt(original, index) : 0;
+#ifndef NANO_SMALL
+ virt_cur_x = fileptr == current ? strnlenpt(original, current_x) : current_x;
+ virt_mark_beginx = fileptr == mark_beginbuf ? strnlenpt(original, mark_beginx) : mark_beginx;
+#endif
pos = 0;
- for (i = 0; i < len; i++) {
- if (realdata[i] == '\t') {
+ for (; *original != '\0'; original++) {
+ if (*original == '\t')
do {
- fileptr->data[pos++] = ' ';
- if (i < current_x)
- virt_cur_x++;
- if (i < mark_beginx)
- virt_mark_beginx++;
+ converted[pos++] = ' ';
} while (pos % tabsize);
- /* must decrement once to account for tab-is-one-character */
- if (i < current_x)
- virt_cur_x--;
- if (i < mark_beginx)
- virt_mark_beginx--;
- } else if (realdata[i] == 127) {
- /* Treat delete characters (ASCII 127's) as ^?'s */
- fileptr->data[pos++] = '^';
- fileptr->data[pos++] = '?';
- if (i < current_x)
- virt_cur_x++;
- if (i < mark_beginx)
- virt_mark_beginx++;
- } else if (realdata[i] == 10) {
- /* Treat newlines (ASCII 10's) embedded in a line as encoded
- nulls (ASCII 0's); the line in question should be run
- through unsunder() before reaching here */
- fileptr->data[pos++] = '^';
- fileptr->data[pos++] = '@';
- if (i < current_x)
- virt_cur_x++;
- if (i < mark_beginx)
- virt_mark_beginx++;
- } else if (is_cntrl_char(realdata[i])) {
- /* Treat control characters as ^symbol's */
- fileptr->data[pos++] = '^';
- fileptr->data[pos++] = realdata[i] + 64;
- if (i < current_x)
- virt_cur_x++;
- if (i < mark_beginx)
- virt_mark_beginx++;
- } else {
- fileptr->data[pos++] = realdata[i];
- }
+ else if (is_cntrl_char(*original)) {
+ converted[pos++] = '^';
+ if (*original == 127)
+ converted[pos++] = '?';
+ else if (*original == '\n')
+ /* Treat newlines (ASCII 10's) embedded in a line as encoded
+ * nulls (ASCII 0's); the line in question should be run
+ * through unsunder() before reaching here */
+ converted[pos++] = '@';
+ else
+ converted[pos++] = *original + 64;
+ } else
+ converted[pos++] = *original;
}
-
- fileptr->data[pos] = '\0';
+ converted[pos] = '\0';
/* Now, paint the line */
- if (current == fileptr && index > COLS - 2) {
- /* This handles when the current line is beyond COLS */
- /* It requires figuring out what page we're on */
- page = get_page_from_virtual(index);
- col = get_page_start_virtual(page);
+ original = fileptr->data;
+ fileptr->data = converted;
+ page_start = get_page_start(index);
+ edit_add(fileptr, line, page_start
+#ifndef NANO_SMALL
+ , virt_mark_beginx, virt_cur_x
+#endif
+ );
+ free(converted);
+ fileptr->data = original;
- edit_add(filetmp, line, col, virt_cur_x, virt_mark_beginx, page);
+ if (page_start > 0)
mvwaddch(edit, line, 0, '$');
-
- if (strlenpt(fileptr->data) > get_page_end_virtual(page) + 1)
- mvwaddch(edit, line, COLS - 1, '$');
- } else {
- /* It's not the current line means that it's at x=0 and page=1 */
- /* If it is the current line, then we're in the same boat */
- edit_add(filetmp, line, 0, virt_cur_x, virt_mark_beginx, 1);
-
- if (strlenpt(&filetmp->data[col]) > COLS)
- mvwaddch(edit, line, COLS - 1, '$');
- }
-
- /* Clean up our mess */
- tmp = fileptr->data;
- fileptr->data = realdata;
- free(tmp);
+ if (pos > page_start + COLS)
+ mvwaddch(edit, line, COLS - 1, '$');
}
/* This function updates current, based on where current_y is;
if (edittop == NULL)
edittop = current;
- /* Don't make the cursor jump around the scrrn whilst updating */
+ /* Don't make the cursor jump around the screen whilst updating */
leaveok(edit, TRUE);
editbot = edittop;
projects / nano.git / commitdiff