Usermode/irc - Fix scrolling on new messages.

[tpg/acess2.git] / Usermode / Applications / gui_terminal_src / vt100.c

diff --git a/Usermode/Applications/gui_terminal_src/vt100.c b/Usermode/Applications/gui_terminal_src/vt100.c
index cdf5371..6a2321e 100644 (file)
--- a/Usermode/Applications/gui_terminal_src/vt100.c
+++ b/Usermode/Applications/gui_terminal_src/vt100.c
@@ -17,6 +17,8 @@
 # include <assert.h>
 # include <stdlib.h>   // malloc/free
 
+# define ASSERTC(a, r, b)      assert(a r b)
+
 static inline int MIN(int a, int b)
 {
        return a < b ? a : b;
@@ -170,7 +172,7 @@ int Term_HandleVT100(tTerminal *Term, int Len, const char *Buf)
                        if( ret <= old_inc_len ) {
                                _SysDebug("Term_HandleVT100: ret(%i) <= old_inc_len(%i), inc_len=%i, '%*C'",
                                        ret, old_inc_len, st->cache_len, st->cache_len, st->cache);
-                               assert(ret > old_inc_len);
+                               ASSERTC(ret, >, old_inc_len);
                        }
                        st->cache_len = 0;
                        //_SysDebug("%i bytes of escape code '%.*s' (return %i)",
@@ -446,9 +448,13 @@ int Term_HandleVT100_Long(tTerminal *Term, int Len, const char *Buffer)
                        Display_MoveCursor(Term, 0, -(args[0] != 0 ? args[0] : 1));
                        break;
                case 'H':
-                       if( argc != 2 ) {
+                       if( argc == 0 ) {
+                               Display_SetCursor(Term, 0, 0);
                        }
-                       else {
+                       else if( argc == 1 ) {
+                               Display_SetCursor(Term, args[0]-1, 0);
+                       }
+                       else if( argc == 2 ) {
                                // Adjust 1-based cursor position to 0-based
                                Display_SetCursor(Term, args[0]-1, args[1]-1);
                        }
@@ -487,12 +493,12 @@ int Term_HandleVT100_Long(tTerminal *Term, int Len, const char *Buffer)
                                break;
                        }
                        break;
-               case 'S':       // Scroll text up n=1
-                       Display_ScrollDown(Term, (argc >= 1 ? args[0] : 1));
-                       break;
-               case 'T':       // Scroll text down n=1
+               case 'S':       // Scroll text up n=1 (expose bottom)
                        Display_ScrollDown(Term, -(argc >= 1 ? args[0] : 1));
                        break;
+               case 'T':       // Scroll text down n=1 (expose top)
+                       Display_ScrollDown(Term, (argc >= 1 ? args[0] : 1));
+                       break;
                case 'c':       // Send Device Attributes
                        switch(args[0])
                        {
@@ -631,7 +637,7 @@ int Term_HandleVT100_Long(tTerminal *Term, int Len, const char *Buffer)
                        break;
                // Set scrolling region
                case 'r':
-                       Display_SetScrollArea(Term, args[0], (args[1] - args[0]));
+                       Display_SetScrollArea(Term, args[0]-1, (args[1] - args[0])+1);
                        break;
                
                case 's':