patch 8.0.0973: initial info about blinking cursor is wrong

Problem:    initial info about blinking cursor is wrong
Solution:   Invert the blink flag.  Add t_VS to stop a blinking cursor.

src/option.c

@@ -3157,6 +3157,8 @@ static struct vimoption options[] =
     p_term("t_AL", T_CAL)
     p_term("t_al", T_AL)
     p_term("t_bc", T_BC)
+    p_term("t_BE", T_BE)
+    p_term("t_BD", T_BD)
     p_term("t_cd", T_CD)
     p_term("t_ce", T_CE)
     p_term("t_cl", T_CL)
@@ -3173,13 +3175,11 @@ static struct vimoption options[] =
     p_term("t_db", T_DB)
     p_term("t_DL", T_CDL)
     p_term("t_dl", T_DL)
+    p_term("t_EC", T_CEC)
     p_term("t_EI", T_CEI)
     p_term("t_fs", T_FS)
+    p_term("t_GP", T_CGP)
     p_term("t_IE", T_CIE)
-    p_term("t_SC", T_CSC)
-    p_term("t_EC", T_CEC)
-    p_term("t_SH", T_CSH)
-    p_term("t_RS", T_CRS)
     p_term("t_IS", T_CIS)
     p_term("t_ke", T_KE)
     p_term("t_ks", T_KS)
@@ -3193,10 +3193,13 @@ static struct vimoption options[] =
     p_term("t_op", T_OP)
     p_term("t_RB", T_RBG)
     p_term("t_RI", T_CRI)
+    p_term("t_RS", T_CRS)
     p_term("t_RV", T_CRV)
     p_term("t_Sb", T_CSB)
+    p_term("t_SC", T_CSC)
     p_term("t_se", T_SE)
     p_term("t_Sf", T_CSF)
+    p_term("t_SH", T_CSH)
     p_term("t_SI", T_CSI)
     p_term("t_so", T_SO)
     p_term("t_SR", T_CSR)
@@ -3211,9 +3214,9 @@ static struct vimoption options[] =
     p_term("t_vb", T_VB)
     p_term("t_ve", T_VE)
     p_term("t_vi", T_VI)
+    p_term("t_VS", T_CVS)
     p_term("t_vs", T_VS)
     p_term("t_WP", T_CWP)
-    p_term("t_GP", T_CGP)
     p_term("t_WS", T_CWS)
     p_term("t_xn", T_XN)
     p_term("t_xs", T_XS)
@@ -3221,8 +3224,6 @@ static struct vimoption options[] =
     p_term("t_ZR", T_CZR)
     p_term("t_8f", T_8F)
     p_term("t_8b", T_8B)
-    p_term("t_BE", T_BE)
-    p_term("t_BD", T_BD)
 
 /* terminal key codes are not in here */
 

src/proto/term.pro

@@ -53,7 +53,6 @@ void cursor_on(void);
 void cursor_off(void);
 void term_cursor_mode(int forced);
 void term_cursor_color(char_u *color);
-void term_cursor_blink(int blink);
 void term_cursor_shape(int shape, int blink);
 void scroll_region_set(win_T *wp, int off);
 void scroll_region_reset(void);

src/term.c

@@ -828,17 +828,13 @@ static struct builtin_term builtin_termcaps[] =
     {(int)KS_LE,	"\b"},
     {(int)KS_VI,	IF_EB("\033[?25l", ESC_STR "[?25l")},
     {(int)KS_VE,	IF_EB("\033[?25h", ESC_STR "[?25h")},
-#if 0
-    /* This is currently disabled, because we cannot reliably restore the
-     * cursor style because of what appears to be an xterm bug. */
-    {(int)KS_VE,	IF_EB("\033[?25h\033[?12l", ESC_STR "[?25h" ESC_STR "[?12l")},
     {(int)KS_VS,	IF_EB("\033[?12h", ESC_STR "[?12h")},
+    {(int)KS_CVS,	IF_EB("\033[?12l", ESC_STR "[?12l")},
 #  ifdef TERMINFO
     {(int)KS_CSH,	IF_EB("\033[%p1%d q", ESC_STR "[%p1%d q")},
 #  else
     {(int)KS_CSH,	IF_EB("\033[%d q", ESC_STR "[%d q")},
 #  endif
-#endif
     {(int)KS_CRS,	IF_EB("\033P$q q\033\\", ESC_STR "P$q q" ESC_STR "\\")},
 #  ifdef TERMINFO
     {(int)KS_CM,	IF_EB("\033[%i%p1%d;%p2%dH",
@@ -1585,7 +1581,7 @@ set_termname(char_u *term)
 				{KS_DL, "dl"}, {KS_CDL,"DL"}, {KS_CS, "cs"},
 				{KS_CL, "cl"}, {KS_CD, "cd"},
 				{KS_VI, "vi"}, {KS_VE, "ve"}, {KS_MB, "mb"},
-				{KS_VS, "vs"}, {KS_ME, "me"}, {KS_MR, "mr"},
+				{KS_ME, "me"}, {KS_MR, "mr"},
 				{KS_MD, "md"}, {KS_SE, "se"}, {KS_SO, "so"},
 				{KS_CZH,"ZH"}, {KS_CZR,"ZR"}, {KS_UE, "ue"},
 				{KS_US, "us"}, {KS_UCE, "Ce"}, {KS_UCS, "Cs"},
@@ -1595,6 +1591,7 @@ set_termname(char_u *term)
 				{KS_BC, "bc"}, {KS_CSB,"Sb"}, {KS_CSF,"Sf"},
 				{KS_CAB,"AB"}, {KS_CAF,"AF"}, {KS_LE, "le"},
 				{KS_ND, "nd"}, {KS_OP, "op"}, {KS_CRV, "RV"},
+				{KS_VS, "vs"}, {KS_CVS, "VS"},
 				{KS_CIS, "IS"}, {KS_CIE, "IE"},
 				{KS_CSC, "SC"}, {KS_CEC, "EC"},
 				{KS_TS, "ts"}, {KS_FS, "fs"},
@@ -3665,11 +3662,11 @@ mouse_model_popup(void)
     void
 scroll_start(void)
 {
-    if (*T_VS != NUL)
+    if (*T_VS != NUL && *T_CVS != NUL)
     {
 	out_str(T_VS);
-	out_str(T_VE);
-	screen_start();			/* don't know where cursor is now */
+	out_str(T_CVS);
+	screen_start();		/* don't know where cursor is now */
     }
 }
 
@@ -3694,10 +3691,9 @@ cursor_on(void)
     void
 cursor_off(void)
 {
-    if (full_screen)
+    if (full_screen && !cursor_is_off)
     {
-	if (!cursor_is_off)
-	    out_str(T_VI);	    /* disable cursor */
+	out_str(T_VI);	    /* disable cursor */
 	cursor_is_off = TRUE;
     }
 }
@@ -3766,20 +3762,10 @@ term_cursor_color(char_u *color)
 	out_flush();
     }
 }
-
-    void
-term_cursor_blink(int blink)
-{
-    if (blink)
-	out_str(T_VS);
-    else
-	out_str(T_VE);
-    out_flush();
-}
 # endif
 
 /*
- * "shape" == 1: block, "shape" == 2: underline, "shape" == 3: vertical bar
+ * "shape": 1 = block, 2 = underline, 3 = vertical bar
  */
     void
 term_cursor_shape(int shape, int blink)
@@ -3789,6 +3775,17 @@ term_cursor_shape(int shape, int blink)
 	OUT_STR(tgoto((char *)T_CSH, 0, shape * 2 - blink));
 	out_flush();
     }
+    /* When t_SH is not set try setting just the blink state. */
+    else if (blink && *T_VS != NUL)
+    {
+	out_str(T_VS);
+	out_flush();
+    }
+    else if (!blink && *T_CVS != NUL)
+    {
+	out_str(T_CVS);
+	out_flush();
+    }
 }
 #endif
 
@@ -4693,7 +4690,9 @@ check_termcode(
 			 * 5 = vertical bar blink, 6 = vertical bar */
 			number = number == 0 ? 1 : number;
 			initial_cursor_shape = (number + 1) / 2;
-			initial_cursor_blink = (number & 1) ? TRUE : FALSE;
+			/* The blink flag is actually inverted, compared to
+			 * the value set with T_SH. */
+			initial_cursor_blink = (number & 1) ? FALSE : TRUE;
 			rcm_status = STATUS_GOT;
 			LOG_TR("Received cursor shape response");
 

src/term.h

@@ -39,7 +39,8 @@ enum SpecialKey
     KS_DB,	/* text may be scrolled up from down */
     KS_VI,	/* cursor invisible */
     KS_VE,	/* cursor visible */
-    KS_VS,	/* cursor very visible */
+    KS_VS,	/* cursor very visible (blink) */
+    KS_CVS,	/* cursor normally visible (no blink) */
     KS_CSH,	/* cursor shape */
     KS_CRS,	/* request cursor shape */
     KS_ME,	/* normal mode */
@@ -131,7 +132,8 @@ extern char_u *(term_strings[]);    /* current terminal strings */
 #define T_DB	(TERM_STR(KS_DB))	/* text may be scrolled up from down */
 #define T_VI	(TERM_STR(KS_VI))	/* cursor invisible */
 #define T_VE	(TERM_STR(KS_VE))	/* cursor visible */
-#define T_VS	(TERM_STR(KS_VS))	/* cursor very visible */
+#define T_VS	(TERM_STR(KS_VS))	/* cursor very visible (blink) */
+#define T_CVS	(TERM_STR(KS_CVS))	/* cursor normally visible (no blink) */
 #define T_CSH	(TERM_STR(KS_CSH))	/* cursor shape */
 #define T_CRS	(TERM_STR(KS_CRS))	/* request cursor shape */
 #define T_ME	(TERM_STR(KS_ME))	/* normal mode */

src/terminal.c

@@ -38,7 +38,6 @@
  * in tl_scrollback are no longer used.
  *
  * TODO:
- * - help index for winptydll, optwin entry for winptydll
  * - make [range]terminal pipe [range] lines to the terminal
  * - implement term_setsize()
  * - add test for giving error for invalid 'termsize' value.
@@ -1271,8 +1270,6 @@ may_set_cursor_props(term_T *term)
 	    term_cursor_color(term->tl_cursor_color);
 	else
 	    term_cursor_color((char_u *)"");
-	/* do both blink and shape+blink, in case setting shape does not work */
-	term_cursor_blink(term->tl_cursor_blink);
 	term_cursor_shape(term->tl_cursor_shape, term->tl_cursor_blink);
     }
 }
@@ -1288,7 +1285,6 @@ may_restore_cursor_props(void)
     {
 	did_change_cursor = FALSE;
 	term_cursor_color((char_u *)"");
-	term_cursor_blink(FALSE);
 	/* this will restore the initial cursor style, if possible */
 	ui_cursor_shape_forced(TRUE);
     }

src/version.c

@@ -769,6 +769,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    973,
 /**/
     972,
 /**/