[vte] emulation: Implement DECSR

[Christian Persch <chpe src gnome org>]

commit 38f09c5ec29a0d00cfbf12aa0d7acf67d1d226f4
Author: Christian Persch <chpe src gnome org>
Date:   Tue Mar 27 19:40:13 2018 +0200

    emulation: Implement DECSR

 src/vteseq.cc |   13 +++++++------
 1 files changed, 7 insertions(+), 6 deletions(-)
---
diff --git a/src/vteseq.cc b/src/vteseq.cc
index 2d96d0a..7e1b9a0 100644
--- a/src/vteseq.cc
+++ b/src/vteseq.cc
@@ -4447,9 +4447,14 @@ VteTerminalPrivate::DECSR(vte::parser::Sequence const& seq)
          *   args[0]: the token
          *
          * References: VT525
-         *
-         * FIXMEchpe: implement this
          */
+
+        /* Note: reset() wipes out @seq, so we need to get the
+         * param beforehand, and use send() instead of reply().
+         */
+        auto const token = seq.collect1(0);
+       reset(true, true);
+        send(VTE_REPLY_DECSRC, {token});
 }
 
 void
@@ -6628,10 +6633,6 @@ VteTerminalPrivate::RIS(vte::parser::Sequence const& seq)
          * References: ECMA-48 § 8.3.105
          */
 
-#if 0
-        vte_screen_hard_reset(screen);
-#endif
-
        reset(true, true);
 }