vim-patch:7.4.2109 (#5518)

vim-patch:7.4.2109

Problem:    Setting 'display' to "lastline" is a drastic change, while
            omitting it results in lots of "@" lines.
Solution:   Add "truncate" to show "@@@" for a truncated line.

ad9c2a08f0

runtime/doc/options.txt

@@ -2110,11 +2110,17 @@ A jump table for the options with a short description can be found at |Q_op|.
 	Change the way text is displayed.  This is comma separated list of
 	flags:
 	lastline	When included, as much as possible of the last line
-			in a window will be displayed.  When not included, a
-			last line that doesn't fit is replaced with "@" lines.
+			in a window will be displayed.  "@@@" is put in the
+			last columns of the last screen line to indicate the
+			rest of the line is not displayed.
+	truncate	Like "lastline", but "@@@" is displayed in the first
+			column of the last screen line.  Overrules "lastline".
 	uhex		Show unprintable characters hexadecimal as <xx>
 			instead of using ^C and ~C.
 
+	When neither "lastline" or "truncate" is included, a last line that
+	doesn't fit is replaced with "@" lines.
+
 						*'eadirection'* *'ead'*
 'eadirection' 'ead'	string	(default "both")
 			global

src/nvim/option_defs.h

@@ -397,10 +397,11 @@ EXTERN char_u   *p_dir;         /* 'directory' */
 EXTERN char_u   *p_dy;          /* 'display' */
 EXTERN unsigned dy_flags;
 #ifdef IN_OPTION_C
-static char *(p_dy_values[]) = {"lastline", "uhex", NULL};
+static char *(p_dy_values[]) = { "lastline", "truncate", "uhex", NULL };
 #endif
 #define DY_LASTLINE             0x001
-#define DY_UHEX                 0x002
+#define DY_TRUNCATE             0x002
+#define DY_UHEX                 0x004
 EXTERN int p_ed;                // 'edcompatible'
 EXTERN bool p_emoji;            // 'emoji'
 EXTERN char_u   *p_ead;         // 'eadirection'

src/nvim/screen.c

@@ -1401,7 +1401,7 @@ static void win_update(win_T *wp)
                  && wp->w_lines[idx].wl_valid
                  && wp->w_lines[idx].wl_lnum == lnum
                  && lnum > wp->w_topline
-                 && !(dy_flags & DY_LASTLINE)
+                 && !(dy_flags & (DY_LASTLINE | DY_TRUNCATE))
                  && srow + wp->w_lines[idx].wl_size > wp->w_height
                  && diff_check_fill(wp, lnum) == 0
                  ) {
@@ -1484,10 +1484,20 @@ static void win_update(win_T *wp)
       /* Window ends in filler lines. */
       wp->w_botline = lnum;
       wp->w_filler_rows = wp->w_height - srow;
-    } else if (dy_flags & DY_LASTLINE) {      /* 'display' has "lastline" */
-      /*
-       * Last line isn't finished: Display "@@@" at the end.
-       */
+    } else if (dy_flags & DY_TRUNCATE) {      // 'display' has "truncate"
+      int scr_row = wp->w_winrow + wp->w_height - 1;
+
+      // Last line isn't finished: Display "@@@" in the last screen line.
+      screen_puts_len((char_u *)"@@", 2, scr_row, wp->w_wincol,
+                      hl_attr(HLF_AT));
+
+      screen_fill(scr_row, scr_row + 1,
+                  (int)wp->w_wincol + 2, (int)W_ENDCOL(wp),
+                  '@', ' ', hl_attr(HLF_AT));
+      set_empty_rows(wp, srow);
+      wp->w_botline = lnum;
+    } else if (dy_flags & DY_LASTLINE) {      // 'display' has "lastline"
+      // Last line isn't finished: Display "@@@" at the end.
       screen_fill(wp->w_winrow + wp->w_height - 1,
                   wp->w_winrow + wp->w_height,
                   W_ENDCOL(wp) - 3, W_ENDCOL(wp),

src/nvim/version.c

@@ -332,7 +332,7 @@ static int included_patches[] = {
   2112,
   // 2111,
   // 2110,
-  // 2109,
+  2109,
   // 2108 NA
   // 2107,
   // 2106,