termptyesc: store when tab are inserted and where they stop

src/bin/termpty.h

@@ -81,12 +81,14 @@ struct _Termatt
    unsigned short fraktur : 1;
    unsigned short framed : 1;
    unsigned short encircled : 1;
-   unsigned short overlined : 1;
+   unsigned short overlined : 1; // TODO: support it
+   unsigned short tab_inserted : 1;
+   unsigned short tab_last : 1;
 #if defined(SUPPORT_80_132_COLUMNS)
    unsigned short is_80_132_mode_allowed : 1;
-   unsigned short bit_padding : 11;
+   unsigned short bit_padding :  9;
 #else
-   unsigned short bit_padding : 12;
+   unsigned short bit_padding : 10;
 #endif
    uint16_t       link_id;
 };

src/bin/termptyesc.c

@@ -207,6 +207,8 @@ _cursor_to_start_of_line(Termpty *ty)
 static void
 _handle_cursor_control(Termpty *ty, const Eina_Unicode *cc)
 {
+   Termcell *cell;
+
    switch (*cc)
      {
       case 0x07: // BEL '\a' (bell)
@@ -220,7 +222,11 @@ _handle_cursor_control(Termpty *ty, const Eina_Unicode *cc)
          return;
       case 0x09: // HT  '\t' (horizontal tab)
          DBG("->HT");
+         cell = &(TERMPTY_SCREEN(ty, ty->cursor_state.cx, ty->cursor_state.cy));
+         cell->att.tab_inserted = 1;
          _tab_forward(ty, 1);
+         cell = &(TERMPTY_SCREEN(ty, ty->cursor_state.cx -1, ty->cursor_state.cy));
+         cell->att.tab_last = 1;
          return;
       case 0x0a: // LF  '\n' (new line)
       case 0x0b: // VT  '\v' (vertical tab)

src/bin/termptyops.c

@@ -427,6 +427,8 @@ termpty_reset_att(Termatt *att)
    att->framed = 0;
    att->encircled = 0;
    att->overlined = 0;
+   att->tab_inserted = 0;
+   att->tab_last = 0;
 }
 
 void