From 63b3d7e0c094da507ddd31174d3be43ad44c332a Mon Sep 17 00:00:00 2001
From: Robert Siemborski <rjs3@andrew.cmu.edu>
Date: Tue, 4 Jul 2000 22:15:39 +0000
Subject: [PATCH] Magic Line Code Added

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@68 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
---
 files.c |  7 +++++++
 nano.c  |  8 ++++++++
 proto.h |  4 +---
 utils.c | 12 ++++++++++++
 4 files changed, 28 insertions(+), 3 deletions(-)

diff --git a/files.c b/files.c
index cc1fd4d5..bd24dd3e 100644
--- a/files.c
+++ b/files.c
@@ -180,6 +180,7 @@ int read_file(int fd, char *filename)
 	statusbar(_("Read %d lines"), lines);
 	return 1;
     }
+
     if (current != NULL) {
 	fileptr->next = current;
 	current->prev = fileptr;
@@ -188,6 +189,9 @@ int read_file(int fd, char *filename)
 	placewewant = 0;
     } else if (fileptr->next == NULL) {
 	filebot = fileptr;
+	new_magicline();
+
+	/* Update the edit buffer */
 	load_file();
     }
     statusbar(_("Read %d lines"), lines);
@@ -326,6 +330,9 @@ int write_file(char *name, int tmp)
 
     dump_buffer(fileage);
     while (fileptr != NULL && fileptr->next != NULL) {
+	/* Next line is so we discount the "magic line" */
+	if(filebot == fileptr && fileptr->data[0] == '\0') break;
+
 	size = write(fd, fileptr->data, strlen(fileptr->data));
 	if (size == -1) {
 	    statusbar(_("Could not open file for writing: %s"),
diff --git a/nano.c b/nano.c
index 435648bd..a391a43b 100644
--- a/nano.c
+++ b/nano.c
@@ -440,6 +440,14 @@ void nano_small_msg(void)
 /* The user typed a printable character; add it to the edit buffer */
 void do_char(char ch)
 {
+    /* magic-line: when a character is inserted on the current magic line,
+     * it means we need a new one! */
+    if(filebot == current && current->data[0] == '\0') {
+	new_magicline();
+	if(current == editbot)
+	    fix_editbot();
+    }
+
     /* More dangerousness fun =) */
     current->data = nrealloc(current->data, strlen(current->data) + 2);
     memmove(&current->data[current_x + 1],
diff --git a/proto.h b/proto.h
index 10da7ce5..54e1b9aa 100644
--- a/proto.h
+++ b/proto.h
@@ -102,7 +102,7 @@ void *nmalloc(size_t howmuch);
 void *nrealloc(void *ptr, size_t howmuch);
 void die(char *msg, ...);
 void new_file(void);
-
+void new_magicline(void);
 
 int do_writeout_void(void), do_exit(void), do_gotoline_void(void);
 int do_insertfile(void), do_search(void), page_up(void), page_down(void);
@@ -116,5 +116,3 @@ int do_replace(void), do_help(void), do_enter_void(void);
 filestruct *copy_node(filestruct * src);
 filestruct *copy_filestruct(filestruct * src);
 filestruct *make_new_node(filestruct * prevnode);
-
-
diff --git a/utils.c b/utils.c
index e9af3a16..c10dda55 100644
--- a/utils.c
+++ b/utils.c
@@ -109,3 +109,15 @@ void *nrealloc(void *ptr, size_t howmuch)
 
     return r;
 }
+
+/* Append a new magic-line to filebot */
+void new_magicline(void) {
+    filebot->next = nmalloc(sizeof(filestruct));
+    filebot->next->data = nmalloc(1);
+    filebot->next->data[0] = '\0';
+    filebot->next->prev = filebot;
+    filebot->next->next = NULL;
+    filebot->next->lineno = filebot->lineno + 1;
+    filebot = filebot->next;
+    totlines++;
+}