tweaks: change a parameter of open_buffer() and invert its logic

src/files.c

@@ -406,13 +406,11 @@ void stat_with_alloc(const char *filename, struct stat **pstat)
 }
 #endif /* !NANO_TINY */
 
-/* This does one of three things.  If the filename is "", just create a new
- * empty buffer.  Otherwise, read the given file into the existing buffer,
- * or into a new buffer when MULTIBUFFER is set or there is no buffer yet. */
-bool open_buffer(const char *filename, bool undoable)
+/* This does one of three things.  If the filename is "", it just creates
+ * a new empty buffer.  When the filename is not empty, it reads that file
+ * into a new buffer when requested, otherwise into the existing buffer. */
+bool open_buffer(const char *filename, bool new_buffer)
 {
-	bool new_buffer = (openfile == NULL || ISSET(MULTIBUFFER));
-		/* Whether we load into the current buffer or a new one. */
 	char *realname;
 		/* The filename after tilde expansion. */
 	FILE *f;
@@ -478,7 +476,7 @@ bool open_buffer(const char *filename, bool undoable)
 	/* If we have a non-new file, read it in.  Then, if the buffer has
 	 * no stat, update the stat, if applicable. */
 	if (rc > 0) {
-		read_file(f, rc, realname, undoable && !new_buffer, new_buffer);
+		read_file(f, rc, realname, !new_buffer, new_buffer);
 #ifndef NANO_TINY
 		if (openfile->current_stat == NULL)
 			stat_with_alloc(realname, &openfile->current_stat);
@@ -1121,7 +1119,7 @@ void do_insertfile(void)
 #ifdef ENABLE_MULTIBUFFER
 				/* When in multibuffer mode, first open a blank buffer. */
 				if (ISSET(MULTIBUFFER))
-					open_buffer("", FALSE);
+					open_buffer("", TRUE);
 #endif
 				/* If the command is not empty, execute it and read its output
 				 * into the buffer, and add the command to the history list. */
@@ -1148,8 +1146,8 @@ void do_insertfile(void)
 				/* Make sure the specified path is tilde-expanded. */
 				answer = free_and_assign(answer, real_dir_from_tilde(answer));
 
-				/* Read the specified file into the current buffer. */
-				open_buffer(answer, TRUE);
+				/* Read the file into a new buffer or into current buffer. */
+				open_buffer(answer, ISSET(MULTIBUFFER));
 			}
 
 #ifdef ENABLE_MULTIBUFFER

src/help.c

@@ -75,7 +75,7 @@ void wrap_the_help_text(bool redisplaying)
 	if (redisplaying)
 		close_buffer();
 
-	open_buffer(tempfilename, FALSE);
+	open_buffer(tempfilename, TRUE);
 	remove_magicline();
 
 	prepare_for_display();

src/nano.c

@@ -1164,7 +1164,7 @@ bool scoop_stdin(void)
 	}
 
 	/* Read the input into a new buffer. */
-	open_buffer("", FALSE);
+	open_buffer("", TRUE);
 	read_file(stream, 0, "stdin", TRUE, FALSE);
 	openfile->edittop = openfile->fileage;
 
@@ -2616,7 +2616,7 @@ int main(int argc, char **argv)
 			optind++;
 			if (!scoop_stdin())
 				continue;
-		} else if (!open_buffer(argv[optind++], FALSE))
+		} else if (!open_buffer(argv[optind++], TRUE))
 			continue;
 
 		/* If a position was given on the command line, go there. */
@@ -2636,7 +2636,7 @@ int main(int argc, char **argv)
 	 * directories, then open a blank buffer and allow editing.  Otherwise,
 	 * switch from the last opened file to the next, that is: the first. */
 	if (openfile == NULL) {
-		open_buffer("", FALSE);
+		open_buffer("", TRUE);
 		UNSET(VIEW_MODE);
 	}
 #ifdef ENABLE_MULTIBUFFER

src/proto.h

@@ -267,7 +267,7 @@ void do_uncut_text(void);
 /* Most functions in files.c. */
 void initialize_buffer_text(void);
 void set_modified(void);
-bool open_buffer(const char *filename, bool undoable);
+bool open_buffer(const char *filename, bool new_buffer);
 #ifdef ENABLE_SPELLER
 void replace_buffer(const char *filename);
 #ifndef NANO_TINY

src/text.c

@@ -3226,7 +3226,7 @@ void do_linter(void)
 							goto free_lints_and_return;
 						} else if (i == 1) {
 							SET(MULTIBUFFER);
-							open_buffer(curlint->filename, FALSE);
+							open_buffer(curlint->filename, TRUE);
 						} else {
 							char *dontwantfile = mallocstrcpy(NULL, curlint->filename);
 							lintstruct *restlint = NULL;