patch 8.0.0768: terminal window status shows "[Scratch]"v8.0.0768

Problem:    Terminal window status shows "[Scratch]".
Solution:   Show "[Terminal]" when no title was set. (Yasuhiro Matsumoto)
            Store the terminal title that vterm sends and use it.  Update the
            special buffer name.  (closes #1869)

4 files changed, 130 insertions, 50 deletions

diff --git a/src/buffer.c b/src/buffer.c
index ae23db080..fb1331736 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -3626,6 +3626,13 @@ maketitle(void)
 #define SPACE_FOR_ARGNR (IOSIZE - 10)  /* at least room for " - VIM" */
 	    if (curbuf->b_fname == NULL)
 		vim_strncpy(buf, (char_u *)_("[No Name]"), SPACE_FOR_FNAME);
+#ifdef FEAT_TERMINAL
+	    else if (curbuf->b_term != NULL)
+	    {
+		vim_strncpy(buf, term_get_status_text(curbuf->b_term),
+							      SPACE_FOR_FNAME);
+	    }
+#endif
 	    else
 	    {
 		p = transstr(gettail(curbuf->b_fname));
@@ -3633,20 +3640,27 @@ maketitle(void)
 		vim_free(p);
 	    }
 
-	    switch (bufIsChanged(curbuf)
-		    + (curbuf->b_p_ro * 2)
-		    + (!curbuf->b_p_ma * 4))
-	    {
-		case 1: STRCAT(buf, " +"); break;
-		case 2: STRCAT(buf, " ="); break;
-		case 3: STRCAT(buf, " =+"); break;
-		case 4:
-		case 6: STRCAT(buf, " -"); break;
-		case 5:
-		case 7: STRCAT(buf, " -+"); break;
-	    }
+#ifdef FEAT_TERMINAL
+	    if (curbuf->b_term == NULL)
+#endif
+		switch (bufIsChanged(curbuf)
+			+ (curbuf->b_p_ro * 2)
+			+ (!curbuf->b_p_ma * 4))
+		{
+		    case 1: STRCAT(buf, " +"); break;
+		    case 2: STRCAT(buf, " ="); break;
+		    case 3: STRCAT(buf, " =+"); break;
+		    case 4:
+		    case 6: STRCAT(buf, " -"); break;
+		    case 5:
+		    case 7: STRCAT(buf, " -+"); break;
+		}
 
-	    if (curbuf->b_fname != NULL)
+	    if (curbuf->b_fname != NULL
+#ifdef FEAT_TERMINAL
+		    && curbuf->b_term == NULL
+#endif
+		    )
 	    {
 		/* Get path of file, replace home dir with ~ */
 		off = (int)STRLEN(buf);
@@ -3663,18 +3677,8 @@ maketitle(void)
 		p = gettail_sep(buf + off);
 		if (p == buf + off)
 		{
-		    char *txt;
-
-#ifdef FEAT_TERMINAL
-		    if (curbuf->b_term != NULL)
-			txt = term_job_running(curbuf)
-						? _("running") : _("finished");
-		    else
-#endif
-			txt = _("help");
-
-		    /* must be a help or terminal buffer */
-		    vim_strncpy(buf + off, (char_u *)txt,
+		    /* must be a help buffer */
+		    vim_strncpy(buf + off, (char_u *)_("help"),
 					   (size_t)(SPACE_FOR_DIR - off - 1));
 		}
 		else
@@ -5670,16 +5674,20 @@ buf_spname(buf_T *buf)
 	    return (char_u *)_(msg_qflist);
     }
 #endif
-#ifdef FEAT_QUICKFIX
+
     /* There is no _file_ when 'buftype' is "nofile", b_sfname
-     * contains the name as specified by the user */
+     * contains the name as specified by the user. */
     if (bt_nofile(buf))
     {
+#ifdef FEAT_TERMINAL
+	if (buf->b_term != NULL)
+	    return term_get_status_text(buf->b_term);
+#endif
 	if (buf->b_sfname != NULL)
 	    return buf->b_sfname;
 	return (char_u *)_("[Scratch]");
     }
-#endif
+
     if (buf->b_fname == NULL)
 	return (char_u *)_("[No Name]");
     return NULL;
diff --git a/src/proto/terminal.pro b/src/proto/terminal.pro
index bdab8902b..d7d153850 100644
--- a/src/proto/terminal.pro
+++ b/src/proto/terminal.pro
@@ -4,6 +4,6 @@ void free_terminal(term_T *term);
 void write_to_term(buf_T *buffer, char_u *msg, channel_T *channel);
 void terminal_loop(void);
 void term_job_ended(job_T *job);
-int term_job_running(buf_T *buf);
 void term_update_window(win_T *wp);
+char_u *term_get_status_text(term_T *term);
 /* vim: set ft=c : */
diff --git a/src/terminal.c b/src/terminal.c
index f2fae5789..ef3c3c241 100644
--- a/src/terminal.c
+++ b/src/terminal.c
@@ -34,7 +34,6 @@
  *
  * TODO:
  * - do not store terminal buffer in viminfo
- * - put terminal title in the statusline
  * - Add a scrollback buffer (contains lines to scroll off the top).
  *   Can use the buf_T lines, store attributes somewhere else?
  * - When the job ends:
@@ -43,6 +42,9 @@
  *   - Free the terminal emulator.
  *   - Display the scrollback buffer (but with attributes).
  *     Make the buffer not modifiable, drop attributes when making changes.
+ *   - Need an option or argument to drop the window+buffer right away, to be
+ *     used for a shell or Vim.
+ * - add a character in :ls output
  * - when closing window and job has not ended, make terminal hidden?
  * - don't allow exiting Vim when a terminal is still running a job
  * - use win_del_lines() to make scroll-up efficient.
@@ -95,6 +97,9 @@ struct terminal_S {
     int		tl_rows_fixed;
     int		tl_cols_fixed;
 
+    char_u	*tl_title; /* NULL or allocated */
+    char_u	*tl_status_text; /* NULL or allocated */
+
     /* Range of screen rows to update.  Zero based. */
     int		tl_dirty_row_start; /* -1 if nothing dirty */
     int		tl_dirty_row_end;   /* row below last one to update */
@@ -271,6 +276,8 @@ free_terminal(term_T *term)
     }
 
     term_free(term);
+    vim_free(term->tl_title);
+    vim_free(term->tl_status_text);
     vim_free(term);
 }
 
@@ -527,6 +534,25 @@ terminal_loop(void)
     void
 term_job_ended(job_T *job)
 {
+    term_T *term;
+    int	    did_one = FALSE;
+
+    for (term = first_term; term != NULL; term = term->tl_next)
+	if (term->tl_job == job)
+	{
+	    vim_free(term->tl_title);
+	    term->tl_title = NULL;
+	    vim_free(term->tl_status_text);
+	    term->tl_status_text = NULL;
+	    redraw_buf_and_status_later(term->tl_buffer, VALID);
+	    did_one = TRUE;
+	}
+    if (did_one)
+    {
+	redraw_statuslines();
+	setcursor();
+	out_flush();
+    }
     if (curbuf->b_term != NULL && curbuf->b_term->tl_job == job)
 	maketitle();
 }
@@ -534,11 +560,10 @@ term_job_ended(job_T *job)
 /*
  * Return TRUE if the job for "buf" is still running.
  */
-    int
-term_job_running(buf_T *buf)
+    static int
+term_job_running(term_T *term)
 {
-    return buf->b_term != NULL && buf->b_term->tl_job != NULL
-	&& buf->b_term->tl_job->jv_status == JOB_STARTED;
+    return term->tl_job != NULL && term->tl_job->jv_status == JOB_STARTED;
 }
 
     static void
@@ -548,22 +573,6 @@ position_cursor(win_T *wp, VTermPos *pos)
     wp->w_wcol = MIN(pos->col, MAX(0, wp->w_width - 1));
 }
 
-static int handle_damage(VTermRect rect, void *user);
-static int handle_moverect(VTermRect dest, VTermRect src, void *user);
-static int handle_movecursor(VTermPos pos, VTermPos oldpos, int visible, void *user);
-static int handle_resize(int rows, int cols, void *user);
-
-static VTermScreenCallbacks screen_callbacks = {
-  handle_damage,	/* damage */
-  handle_moverect,	/* moverect */
-  handle_movecursor,	/* movecursor */
-  NULL,			/* settermprop */
-  NULL,			/* bell */
-  handle_resize,	/* resize */
-  NULL,			/* sb_pushline */
-  NULL			/* sb_popline */
-};
-
     static int
 handle_damage(VTermRect rect, void *user)
 {
@@ -615,6 +624,30 @@ handle_movecursor(
     return 1;
 }
 
+    static int
+handle_settermprop(
+	VTermProp prop,
+	VTermValue *value,
+	void *user)
+{
+    term_T	*term = (term_T *)user;
+
+    switch (prop)
+    {
+	case VTERM_PROP_TITLE:
+	    vim_free(term->tl_title);
+	    term->tl_title = vim_strsave((char_u *)value->string);
+	    vim_free(term->tl_status_text);
+	    term->tl_status_text = NULL;
+	    if (term == curbuf->b_term)
+		maketitle();
+	    return 1;
+	default:
+	    break;
+    }
+    return 0;
+}
+
 /*
  * The job running in the terminal resized the terminal.
  */
@@ -639,6 +672,17 @@ handle_resize(int rows, int cols, void *user)
     return 1;
 }
 
+static VTermScreenCallbacks screen_callbacks = {
+  handle_damage,	/* damage */
+  handle_moverect,	/* moverect */
+  handle_movecursor,	/* movecursor */
+  handle_settermprop,	/* settermprop */
+  NULL,			/* bell */
+  handle_resize,	/* resize */
+  NULL,			/* sb_pushline */
+  NULL			/* sb_popline */
+};
+
 /*
  * Reverse engineer the RGB value into a cterm color index.
  * First color is 1.  Return 0 if no match found.
@@ -950,6 +994,32 @@ create_vterm(term_T *term, int rows, int cols)
     vterm_screen_reset(screen, 1 /* hard */);
 }
 
+/*
+ * Return the text to show for the buffer name and status.
+ */
+    char_u *
+term_get_status_text(term_T *term)
+{
+    if (term->tl_status_text == NULL)
+    {
+	char_u *txt;
+	size_t len;
+
+	if (term->tl_title != NULL)
+	    txt = term->tl_title;
+	else if (term_job_running(term))
+	    txt = (char_u *)_("running");
+	else
+	    txt = (char_u *)_("finished");
+	len = 9 + STRLEN(term->tl_buffer->b_fname) + STRLEN(txt);
+	term->tl_status_text = alloc(len);
+	if (term->tl_status_text != NULL)
+	    vim_snprintf((char *)term->tl_status_text, len, "%s [%s]",
+						term->tl_buffer->b_fname, txt);
+    }
+    return term->tl_status_text;
+}
+
 # ifdef WIN3264
 
 #define WINPTY_SPAWN_FLAG_AUTO_SHUTDOWN 1ul
diff --git a/src/version.c b/src/version.c
index d629eac52..894fa452d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    768,
+/**/
     767,
 /**/
     766,