From cdc7834ba447eb8a6a029bb72f1d54927ac8012c Mon Sep 17 00:00:00 2001
From: David Herrmann <dh.herrmann@googlemail.com>
Date: Wed, 30 May 2012 20:49:39 +0200
Subject: [PATCH] vte: allow setting margins

Support changing margin size of the terminal.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
---
 src/console.c | 25 +++++++++++++++++++++++++
 src/console.h |  2 ++
 src/vte.c     | 12 +++++++++++-
 3 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/src/console.c b/src/console.c
index 4288389..da4a728 100644
--- a/src/console.c
+++ b/src/console.c
@@ -1071,6 +1071,31 @@ unsigned int kmscon_console_get_height(struct kmscon_console *con)
 	return con->cells->size_y;
 }
 
+int kmscon_console_set_margins(struct kmscon_console *con,
+			       unsigned int top, unsigned int bottom)
+{
+	unsigned int upper, lower;
+
+	if (!con)
+		return -EINVAL;
+
+	if (!top)
+		top = 1;
+
+	if (bottom <= top) {
+		upper = 0;
+		lower = 0;
+	} else if (bottom > con->cells->size_y) {
+		upper = 0;
+		lower = 0;
+	} else {
+		upper = top - 1;
+		lower = con->cells->size_y - bottom;
+	}
+
+	return kmscon_buffer_set_margins(con->cells, upper, lower);
+}
+
 void kmscon_console_reset(struct kmscon_console *con)
 {
 	if (!con)
diff --git a/src/console.h b/src/console.h
index f425139..f867fbe 100644
--- a/src/console.h
+++ b/src/console.h
@@ -60,6 +60,8 @@ unsigned int kmscon_console_get_width(struct kmscon_console *con);
 unsigned int kmscon_console_get_height(struct kmscon_console *con);
 int kmscon_console_resize(struct kmscon_console *con, unsigned int x,
 					unsigned int y, unsigned int height);
+int kmscon_console_set_margins(struct kmscon_console *con,
+			       unsigned int top, unsigned int bottom);
 void kmscon_console_reset(struct kmscon_console *con);
 void kmscon_console_set_flags(struct kmscon_console *con, unsigned int flags);
 void kmscon_console_reset_flags(struct kmscon_console *con, unsigned int flags);
diff --git a/src/vte.c b/src/vte.c
index 8d42ee5..4b8b256 100644
--- a/src/vte.c
+++ b/src/vte.c
@@ -979,7 +979,7 @@ static void csi_dev_attr(struct kmscon_vte *vte)
 
 static void do_csi(struct kmscon_vte *vte, uint32_t data)
 {
-	int num, x, y;
+	int num, x, y, upper, lower;
 
 	if (vte->csi_argc < CSI_ARG_MAX)
 		vte->csi_argc++;
@@ -1073,6 +1073,16 @@ static void do_csi(struct kmscon_vte *vte, uint32_t data)
 	case 'l': /* RM: Reset Mode */
 		csi_mode(vte, false);
 		break;
+	case 'r': /* DECSTBM */
+		/* set margin size */
+		upper = vte->csi_argv[0];
+		if (upper < 0)
+			upper = 0;
+		lower = vte->csi_argv[1];
+		if (lower < 0)
+			lower = 0;
+		kmscon_console_set_margins(vte->con, upper, lower);
+		break;
 	case 'c': /* DA */
 		/* device attributes */
 		csi_dev_attr(vte);