From 16e143f970e540b048aab3e1f7883f91d407f1a7 Mon Sep 17 00:00:00 2001
From: Boris Faure <billiob@gmail.com>
Date: Mon, 22 Apr 2013 22:27:52 +0200
Subject: [PATCH] compat: add margin top support on Origin mode

---
 src/bin/termpty.h    |  1 +
 src/bin/termptyesc.c | 20 +++++++++++++++++---
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/src/bin/termpty.h b/src/bin/termpty.h
index 6db0a3f6..b4adcba7 100644
--- a/src/bin/termpty.h
+++ b/src/bin/termpty.h
@@ -77,6 +77,7 @@ struct _Termstate
    unsigned char chset[4];
    int           scroll_y1, scroll_y2;
    int           had_cr_x, had_cr_y;
+   int           margin_top; // soon, more to come...
    unsigned int  multibyte : 1;
    unsigned int  alt_kp : 1;
    unsigned int  insert : 1;
diff --git a/src/bin/termptyesc.c b/src/bin/termptyesc.c
index 93891d06..2962ccb4 100644
--- a/src/bin/termptyesc.c
+++ b/src/bin/termptyesc.c
@@ -361,9 +361,9 @@ _handle_esc_csi(Termpty *ty, const Eina_Unicode *c, Eina_Unicode *ce)
              arg--;
              if (arg < 0) arg = 0;
              else if (arg >= ty->h) arg = ty->h - 1;
-             if (b) ty->state.cy = arg;
              if (b)
                {
+                  ty->state.cy = arg;
                   arg = _csi_arg_get(&b);
                   if (arg < 1) arg = 1;
                   arg--;
@@ -373,6 +373,7 @@ _handle_esc_csi(Termpty *ty, const Eina_Unicode *c, Eina_Unicode *ce)
              else if (arg >= ty->w) arg = ty->w - 1;
              if (b) ty->state.cx = arg;
           }
+        ty->state.cy += ty->state.margin_top;
        break;
       case 'G': // to column N
         arg = _csi_arg_get(&b);
@@ -566,6 +567,8 @@ _handle_esc_csi(Termpty *ty, const Eina_Unicode *c, Eina_Unicode *ce)
                                                          2 + (mode ? 132 : 80) * w,
                                                          2 + 24 * h);
                                       termpty_resize(ty, mode ? 132 : 80, 24);
+                                      _termpty_reset_state(ty);
+                                      _termpty_clear_screen(ty, TERMPTY_CLR_ALL);
                                    }
 #endif
                                  break;
@@ -579,9 +582,20 @@ _handle_esc_csi(Termpty *ty, const Eina_Unicode *c, Eina_Unicode *ce)
                                  break;
                                case 6:
                                  handled = 1;
-                                 ERR("TODO: origin mode: cursor is at 0,0"
+                                 if (mode)
+                                   {
+                                      ty->state.margin_top = ty->state.cy;
+                                      ty->state.cx = 0;
+                                   }
+                                 else
+                                   {
+                                      ty->state.cx = 0;
+                                      ty->state.margin_top = 0;
+                                   }
+                                 DBG("XXX: origin mode (%d): cursor is at 0,0"
                                      "cursor limited to screen/start point"
-                                     " for line #'s depends on top margin");
+                                     " for line #'s depends on top margin",
+                                     mode);
                                  break;
                                case 7:
                                  handled = 1;