mirror of https://github.com/MidnightCommander/mc
252 lines
6.2 KiB
C
252 lines
6.2 KiB
C
/* editor book mark handling
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Copyright (C) 1996, 1997 the Free Software Foundation
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Authors: 1996, 1997 Paul Sheer
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307, USA.
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*/
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#include <config.h>
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#include "edit.h"
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#if defined (HAVE_MAD) && ! defined (MIDNIGHT) && ! defined (GTK)
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#include "mad.h"
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#endif
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/* note, if there is more than one bookmark on a line, then they are
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appended after each other and the last one is always the one found
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by book_mark_found() i.e. last in is the one seen */
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static inline struct _book_mark *double_marks (WEdit * edit, struct _book_mark *p)
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{
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if (p->next)
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while (p->next->line == p->line)
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p = p->next;
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return p;
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}
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/* returns the first bookmark on or before this line */
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struct _book_mark *book_mark_find (WEdit * edit, int line)
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{
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struct _book_mark *p;
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if (!edit->book_mark) {
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/* must have an imaginary top bookmark at line -1 to make things less complicated */
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edit->book_mark = malloc (sizeof (struct _book_mark));
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memset (edit->book_mark, 0, sizeof (struct _book_mark));
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edit->book_mark->line = -1;
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return edit->book_mark;
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}
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for (p = edit->book_mark; p; p = p->next) {
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if (p->line > line)
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break; /* gone past it going downward */
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if (p->line <= line) {
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if (p->next) {
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if (p->next->line > line) {
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edit->book_mark = p;
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return double_marks (edit, p);
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}
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} else {
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edit->book_mark = p;
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return double_marks (edit, p);
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}
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}
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}
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for (p = edit->book_mark; p; p = p->prev) {
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if (p->next)
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if (p->next->line <= line)
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break; /* gone past it going upward */
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if (p->line <= line) {
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if (p->next) {
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if (p->next->line > line) {
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edit->book_mark = p;
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return double_marks (edit, p);
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}
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} else {
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edit->book_mark = p;
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return double_marks (edit, p);
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}
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}
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}
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return 0; /* can't get here */
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}
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/* returns true if a bookmark exists at this line of colour c */
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int book_mark_query_color (WEdit * edit, int line, int c)
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{
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struct _book_mark *p;
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if (!edit->book_mark)
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return 0;
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for (p = book_mark_find (edit, line); p; p = p->prev) {
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if (p->line != line)
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return 0;
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if (p->c == c)
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return 1;
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}
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return 0;
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}
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/* returns the number of bookmarks at this line and a list of their colours in c
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up to a maximum of 8 colours */
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int book_mark_query_all (WEdit * edit, int line, int *c)
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{
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int i;
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struct _book_mark *p;
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if (!edit->book_mark)
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return 0;
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for (i = 0, p = book_mark_find (edit, line); p && i < 8; p = p->prev, i++) {
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if (p->line != line)
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return i;
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c[i] = p->c;
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}
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return i;
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}
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/* insert a bookmark at this line */
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void book_mark_insert (WEdit * edit, int line, int c)
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{
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struct _book_mark *p, *q;
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p = book_mark_find (edit, line);
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#if 0
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if (p->line == line) { /* already exists, so just change the colour */
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if (p->c != c) {
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edit->force |= REDRAW_LINE;
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p->c = c;
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}
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return;
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}
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#endif
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edit->force |= REDRAW_LINE;
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/* create list entry */
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q = malloc (sizeof (struct _book_mark));
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memset (q, 0, sizeof (struct _book_mark));
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q->line = line;
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q->c = c;
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q->next = p->next;
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/* insert into list */
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q->prev = p;
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if (p->next)
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p->next->prev = q;
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p->next = q;
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#if !defined (GTK) && !defined (MIDNIGHT)
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render_scrollbar (edit->widget->vert_scrollbar);
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#endif
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}
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/* remove a bookmark if there is one at this line matching this colour - c of -1 clear all */
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/* returns non-zero on not-found */
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int book_mark_clear (WEdit * edit, int line, int c)
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{
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struct _book_mark *p, *q;
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int r = 1;
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int rend = 0;
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if (!edit->book_mark)
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return r;
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for (p = book_mark_find (edit, line); p; p = q) {
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q = p->prev;
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if (p->line == line && (p->c == c || c == -1)) {
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r = 0;
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edit->force |= REDRAW_LINE;
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edit->book_mark = p->prev;
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p->prev->next = p->next;
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if (p->next)
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p->next->prev = p->prev;
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rend = 1;
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free (p);
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break;
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}
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}
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/* if there is only our dummy book mark left, clear it for speed */
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if (edit->book_mark->line == -1 && !edit->book_mark->next) {
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free (edit->book_mark);
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edit->book_mark = 0;
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}
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#if !defined (GTK) && !defined (MIDNIGHT)
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if (rend)
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render_scrollbar (edit->widget->vert_scrollbar);
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#endif
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return r;
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}
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/* clear all bookmarks matching this colour, if c is -1 clears all */
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void book_mark_flush (WEdit * edit, int c)
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{
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struct _book_mark *p, *q;
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int rend = 0;
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if (!edit->book_mark)
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return;
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edit->force |= REDRAW_PAGE;
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while (edit->book_mark->prev)
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edit->book_mark = edit->book_mark->prev;
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for (q = edit->book_mark->next; q; q = p) {
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p = q->next;
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if (q->c == c || c == -1) {
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q->prev->next = q->next;
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if (p)
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p->prev = q->prev;
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rend = 1;
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free (q);
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}
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}
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if (!edit->book_mark->next) {
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free (edit->book_mark);
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edit->book_mark = 0;
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}
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#if !defined (GTK) && !defined (MIDNIGHT)
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if (rend)
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render_scrollbar (edit->widget->vert_scrollbar);
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#endif
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}
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/* shift down bookmarks after this line */
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void book_mark_inc (WEdit * edit, int line)
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{
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int rend = 0;
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if (edit->book_mark) {
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struct _book_mark *p;
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p = book_mark_find (edit, line);
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for (p = p->next; p; p = p->next) {
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p->line++;
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rend = 1;
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}
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}
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#if !defined (GTK) && !defined (MIDNIGHT)
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if (rend)
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render_scrollbar (edit->widget->vert_scrollbar);
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#endif
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}
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/* shift up bookmarks after this line */
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void book_mark_dec (WEdit * edit, int line)
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{
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int rend = 0;
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if (edit->book_mark) {
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struct _book_mark *p;
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p = book_mark_find (edit, line);
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for (p = p->next; p; p = p->next) {
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p->line--;
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rend = 1;
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}
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}
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#if !defined (GTK) && !defined (MIDNIGHT)
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if (rend)
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render_scrollbar (edit->widget->vert_scrollbar);
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#endif
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}
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