[vte] emulation: Remove LNM mode support

[Christian Persch <chpe src gnome org>]

commit 011856ac1904f79ddabce4d72c6dd6e9b428d5a9
Author: Christian Persch <chpe src gnome org>
Date:   Tue Mar 27 19:40:12 2018 +0200

    emulation: Remove LNM mode support
    
    LNM has been deprecated for so long that it's been removed
    from ECMA-48, see § F.5.2.

 src/vte.cc         |   50 +++++++-------------------------------------------
 src/vteinternal.hh |    5 +----
 src/vteseq.cc      |    3 ---
 3 files changed, 8 insertions(+), 50 deletions(-)
---
diff --git a/src/vte.cc b/src/vte.cc
index 7836a07..5864b6d 100644
--- a/src/vte.cc
+++ b/src/vte.cc
@@ -2893,7 +2893,6 @@ VteTerminalPrivate::restore_cursor(VteScreen *screen__)
         m_origin_mode = screen__->saved.origin_mode;
         m_sendrecv_mode = screen__->saved.sendrecv_mode;
         m_insert_mode = screen__->saved.insert_mode;
-        m_linefeed_mode = screen__->saved.linefeed_mode;
         m_defaults = screen__->saved.defaults;
         m_color_defaults = screen__->saved.color_defaults;
         m_fill_defaults = screen__->saved.fill_defaults;
@@ -2913,7 +2912,6 @@ VteTerminalPrivate::save_cursor(VteScreen *screen__)
         screen__->saved.origin_mode = m_origin_mode;
         screen__->saved.sendrecv_mode = m_sendrecv_mode;
         screen__->saved.insert_mode = m_insert_mode;
-        screen__->saved.linefeed_mode = m_linefeed_mode;
         screen__->saved.defaults = m_defaults;
         screen__->saved.color_defaults = m_color_defaults;
         screen__->saved.fill_defaults = m_fill_defaults;
@@ -4124,15 +4122,14 @@ VteTerminalPrivate::pty_io_write(GIOChannel *channel,
 void
 VteTerminalPrivate::send_child(char const* data,
                                gssize length,
-                               bool local_echo,
-                               bool newline_stuff)
+                               bool local_echo)
 {
        gsize icount, ocount;
        const guchar *ibuf;
        guchar *obuf, *obufptr;
        gchar *cooked;
        VteConv conv;
-       long crcount, cooked_length, i;
+       long cooked_length, i;
 
         if (!m_input_enabled)
                 return;
@@ -4151,36 +4148,9 @@ VteTerminalPrivate::send_child(char const* data,
                g_warning(_("Error (%s) converting data for child, dropping."),
                          g_strerror(errno));
        } else {
-               crcount = 0;
-               if (newline_stuff) {
-                       for (i = 0; i < obuf - obufptr; i++) {
-                               switch (obufptr[i]) {
-                               case '\015':
-                                       crcount++;
-                                       break;
-                               default:
-                                       break;
-                               }
-                       }
-               }
-               if (crcount > 0) {
-                       cooked = (char *)g_malloc(obuf - obufptr + crcount);
-                       cooked_length = 0;
-                       for (i = 0; i < obuf - obufptr; i++) {
-                               switch (obufptr[i]) {
-                               case '\015':
-                                       cooked[cooked_length++] = '\015';
-                                       cooked[cooked_length++] = '\012';
-                                       break;
-                               default:
-                                       cooked[cooked_length++] = obufptr[i];
-                                       break;
-                               }
-                       }
-               } else {
-                       cooked = (gchar *)obufptr;
-                       cooked_length = obuf - obufptr;
-               }
+                cooked = (gchar *)obufptr;
+                cooked_length = obuf - obufptr;
+
                /* Tell observers that we're sending this to the child. */
                if (cooked_length > 0) {
                        emit_commit(cooked, cooked_length);
@@ -4227,11 +4197,7 @@ VteTerminalPrivate::send_child(char const* data,
                         * become available for writing, set that up here. */
                        connect_pty_write();
                }
-               if (crcount > 0) {
-                       g_free(cooked);
-               }
        }
-       return;
 }
 
 /*
@@ -4255,7 +4221,7 @@ VteTerminalPrivate::feed_child(char const *text,
                length = strlen(text);
 
        if (length > 0) {
-               send_child(text, length, false, false);
+               send_child(text, length, false);
        }
 }
 
@@ -4300,8 +4266,7 @@ VteTerminalPrivate::feed_child_using_modes(char const* data,
 
        if (length > 0)
                send_child(data, length,
-                           !m_sendrecv_mode,
-                           m_linefeed_mode);
+                           !m_sendrecv_mode);
 }
 
 /* Send text from the input method to the child. */
@@ -10579,7 +10544,6 @@ VteTerminalPrivate::reset(bool clear_tabstops,
         m_scrolling_restricted = FALSE;
         m_sendrecv_mode = TRUE;
         m_insert_mode = FALSE;
-        m_linefeed_mode = FALSE;
         m_origin_mode = FALSE;
         m_reverse_mode = FALSE;
        m_cursor_visible = TRUE;
diff --git a/src/vteinternal.hh b/src/vteinternal.hh
index 5440e9a..d8bcd4e 100644
--- a/src/vteinternal.hh
+++ b/src/vteinternal.hh
@@ -130,7 +130,6 @@ struct _VteScreen {
                 gboolean origin_mode;
                 gboolean sendrecv_mode;
                 gboolean insert_mode;
-                gboolean linefeed_mode;
                 VteCell defaults;
                 VteCell color_defaults;
                 VteCell fill_defaults;
@@ -328,7 +327,6 @@ public:
         gboolean m_origin_mode;   /* origin mode */
         gboolean m_sendrecv_mode; /* sendrecv mode */
         gboolean m_insert_mode;   /* insert mode */
-        gboolean m_linefeed_mode; /* linefeed mode */
         VteCell m_defaults;       /* default characteristics
                                      for insertion of any new
                                      characters */
@@ -792,8 +790,7 @@ public:
         void feed_chunks(struct _vte_incoming_chunk *chunks);
         void send_child(char const* data,
                         gssize length,
-                        bool local_echo,
-                        bool newline_stuff);
+                        bool local_echo);
         void feed_child_using_modes(char const* data,
                                     gssize length);
 
diff --git a/src/vteseq.cc b/src/vteseq.cc
index cb8b356..2c9238c 100644
--- a/src/vteseq.cc
+++ b/src/vteseq.cc
@@ -494,9 +494,6 @@ VteTerminalPrivate::set_mode(vte::parser::Sequence const& params,
                 case 12:       /* send/receive mode (local echo) */
                         m_sendrecv_mode = value;
                         break;
-                case 20:       /* automatic newline / normal linefeed mode */
-                        m_linefeed_mode = value;
-                        break;
                 default:
                         break;
                 }