input: do not auto-indent when something is pasted into nano from outside

Also, do not break overlong lines and do not convert tabs to spaces,
nor interpret a <Tab> as an indent command (when the mark is on).
In other words: accept an outside paste as literally as possible.

This fulfills https://savannah.gnu.org/bugs/?40060.
Requested-by: Egmont Koblinger <egmont@gmail.com>

And fulfills https://savannah.gnu.org/bugs/?57527.
Requested-by: Sébastien Desreux <seb@h-k.fr>
Requested-by: Hans Ecke <hecke@gxt.com>

Original-idea-by: Brand Huntsman <alpha@qzx.com>

src/nano.c

@@ -78,6 +78,9 @@ static linestruct *hindline;
 static linestruct *filetail;
 		/* What was the bottom line of the buffer. */
 
+static bool pasting_from_outside = FALSE;
+		/* Whether a bracketed paste is in progress. */
+
 /* Create a new linestruct node.  Note that we do not set prevnode->next. */
 linestruct *make_new_node(linestruct *prevnode)
 {
@@ -1493,6 +1496,9 @@ void do_input(void)
 	}
 #endif
 
+	if (bracketed_paste)
+		pasting_from_outside = TRUE;
+
 	/* Check for a shortcut in the main list. */
 	shortcut = get_shortcut(&input);
 
@@ -1534,6 +1540,7 @@ void do_input(void)
 			 * at once, filtering out any ASCII control codes. */
 			puddle[depth] = '\0';
 			inject(puddle, depth, TRUE);
+			pasting_from_outside = FALSE;
 
 			/* Empty the input buffer. */
 			free(puddle);
@@ -1699,7 +1706,7 @@ void inject(char *output, size_t output_len, bool filtering)
 
 #ifdef ENABLE_WRAPPING
 		/* If text gets wrapped, the edit window needs a refresh. */
-		if (ISSET(BREAK_LONG_LINES) && do_wrap())
+		if (ISSET(BREAK_LONG_LINES) && !pasting_from_outside && do_wrap())
 			refresh_needed = TRUE;
 #endif
 	}

src/text.c

@@ -68,12 +68,12 @@ void do_mark(void)
 void do_tab(void)
 {
 #ifdef ENABLE_COLOR
-	if (openfile->syntax && openfile->syntax->tab)
+	if (openfile->syntax && openfile->syntax->tab && !bracketed_paste)
 		inject(openfile->syntax->tab, strlen(openfile->syntax->tab), FALSE);
 	else
 #endif
 #ifndef NANO_TINY
-	if (ISSET(TABS_TO_SPACES)) {
+	if (ISSET(TABS_TO_SPACES) && !bracketed_paste) {
 		char *spaces = charalloc(tabsize + 1);
 		size_t length = tabsize - (xplustabs() % tabsize);
 
@@ -853,7 +853,7 @@ void do_enter(void)
 	linestruct *sampleline = openfile->current;
 	bool allblanks = FALSE;
 
-	if (ISSET(AUTOINDENT)) {
+	if (ISSET(AUTOINDENT) && !bracketed_paste) {
 #ifdef ENABLE_JUSTIFY
 		/* When doing automatic long-line wrapping and the next line is
 		 * in this same paragraph, use its indentation as the model. */
@@ -875,7 +875,7 @@ void do_enter(void)
 	strcpy(&newnode->data[extra], openfile->current->data +
 										openfile->current_x);
 #ifndef NANO_TINY
-	if (ISSET(AUTOINDENT)) {
+	if (ISSET(AUTOINDENT) && !bracketed_paste) {
 		/* Copy the whitespace from the sample line to the new one. */
 		strncpy(newnode->data, sampleline->data, extra);
 		/* If there were only blanks before the cursor, trim them. */

src/winio.c

@@ -657,7 +657,7 @@ int parse_kbinput(WINDOW *win)
 #ifndef NANO_TINY
 	/* When <Tab> is pressed while the mark is on, do an indent. */
 	if (retval == TAB_CODE && openfile->mark && currmenu == MMAIN &&
-							openfile->mark != openfile->current)
+				!bracketed_paste && openfile->mark != openfile->current)
 		return INDENT_KEY;
 #endif