From 3e6454f2d6a87cf173617b8232fca77934bc6a6c Mon Sep 17 00:00:00 2001
From: Nicholas Marriott <nicm@openbsd.org>
Date: Sat, 5 May 2012 18:17:59 +0000
Subject: Pull CRA out into a separate function and add ERA, from Ailin Nemui.

---
 tty.c | 53 ++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 42 insertions(+), 11 deletions(-)

(limited to 'tty.c')

diff --git a/tty.c b/tty.c
index 03a99341..6b22c851 100644
--- a/tty.c
+++ b/tty.c
@@ -44,6 +44,10 @@ void	tty_colours_fg(struct tty *, const struct grid_cell *);
 void	tty_colours_bg(struct tty *, const struct grid_cell *);
 
 int	tty_large_region(struct tty *, const struct tty_ctx *);
+void	tty_cra_pane(struct tty *,
+    const struct tty_ctx *, u_int, u_int, u_int, u_int, u_int, u_int);
+void	tty_era_pane(struct tty *,
+    const struct tty_ctx *, u_int, u_int, u_int, u_int);
 void	tty_redraw_region(struct tty *, const struct tty_ctx *);
 void	tty_emulate_repeat(
 	    struct tty *, enum tty_code_code, enum tty_code_code, u_int);
@@ -52,6 +56,8 @@ void	tty_cell(struct tty *,
 
 #define tty_use_acs(tty) \
 	(tty_term_has(tty->term, TTYC_ACSC) && !((tty)->flags & TTY_UTF8))
+#define tty_use_rect(tty) \
+	(tty->xterm_version > 270)
 
 void
 tty_init(struct tty *tty, int fd, char *term)
@@ -689,6 +695,38 @@ tty_write(
 	}
 }
 
+void
+tty_cra_pane(struct tty *tty, const struct tty_ctx *ctx,
+    u_int t, u_int l, u_int b, u_int r, u_int tt, u_int tl)
+{
+	char	 tmp[64];
+
+	snprintf(tmp, sizeof tmp,
+		 "\033[%u;%u;%u;%u;1;%u;%u;1$v",
+		 ctx->yoff + t + 1,
+		 ctx->xoff + l + 1,
+		 ctx->yoff + b + 1,
+		 ctx->xoff + r + 1,
+		 ctx->yoff + tt + 1,
+		 ctx->xoff + tl + 1);
+	tty_puts(tty, tmp);
+}
+
+void
+tty_era_pane(struct tty *tty, const struct tty_ctx *ctx,
+    u_int t, u_int l, u_int b, u_int r)
+{
+	char	 tmp[64];
+
+	snprintf(tmp, sizeof tmp,
+		 "\033[%u;%u;%u;%u$z",
+		 ctx->yoff + t + 1,
+		 ctx->xoff + l + 1,
+		 ctx->yoff + b + 1,
+		 ctx->xoff + r + 1);
+	tty_puts(tty, tmp);
+}
+
 void
 tty_cmd_insertcharacter(struct tty *tty, const struct tty_ctx *ctx)
 {
@@ -868,7 +906,6 @@ tty_cmd_linefeed(struct tty *tty, const struct tty_ctx *ctx)
 {
 	struct window_pane	*wp = ctx->wp;
 	struct screen		*s = wp->screen;
-	char			 tmp[64];
 
 	if (ctx->ocy != ctx->orlower)
 		return;
@@ -877,16 +914,10 @@ tty_cmd_linefeed(struct tty *tty, const struct tty_ctx *ctx)
 	    !tty_term_has(tty->term, TTYC_CSR)) {
 		if (tty_large_region(tty, ctx))
 			wp->flags |= PANE_REDRAW;
-		else if (tty->xterm_version > 270) {
-			snprintf(tmp, sizeof tmp,
-			    "\033[%u;%u;%u;%u;1;%u;%u;1$v",
-			    ctx->yoff + ctx->orupper + 2,
-			    ctx->xoff + 1,
-			    ctx->yoff + ctx->orlower + 1,
-			    ctx->xoff + screen_size_x(s),
-			    ctx->yoff + ctx->orupper + 1,
-			    ctx->xoff + 1);
-			tty_puts(tty, tmp);
+		else if (tty_use_rect(tty)) {
+			tty_cra_pane (tty, ctx, ctx->orupper + 1, 0,
+			    ctx->orlower, screen_size_x(s) - 1,
+			    ctx->orupper, 0);
 			tty_cmd_clearline(tty, ctx);
 		} else
 			tty_redraw_region(tty, ctx);
-- 
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