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