fixed swapped 0 and 1 in clearing commands

user/ansi_parser.c

@@ -12,22 +12,25 @@ static const char _ansi_actions[] = {
 	3, 1, 4, 1, 5, 1, 6, 1, 
 	7, 1, 8, 1, 9, 1, 10, 1, 
 	11, 1, 12, 1, 13, 1, 14, 2, 
-	9, 10, 2, 9, 11
+	2, 5, 2, 10, 11, 2, 10, 12
+	
 };
 
 static const char _ansi_eof_actions[] = {
 	0, 13, 13, 13, 13, 13, 13, 13, 
 	13, 13, 13, 13, 13, 13, 13, 13, 
 	13, 13, 13, 13, 13, 13, 13, 13, 
-	13, 13, 0, 0, 0, 0, 0
+	13, 13, 13, 13, 0, 0, 0, 0, 
+	0, 0, 0, 0
 };
 
 static const int ansi_start = 1;
-static const int ansi_first_final = 26;
+static const int ansi_first_final = 28;
 static const int ansi_error = 0;
 
-static const int ansi_en_CSI_body = 3;
-static const int ansi_en_OSC_body = 5;
+static const int ansi_en_CSI_body = 4;
+static const int ansi_en_OSC_body = 6;
+static const int ansi_en_TITLE_body = 26;
 static const int ansi_en_main = 1;
 
 
@@ -80,7 +83,7 @@ ansi_parser(const char *newdata, size_t len)
 	// Init Ragel on the first run
 	if (cs == -1) {
 		
-/* #line 84 "user/ansi_parser.c" */
+/* #line 87 "user/ansi_parser.c" */
 	{
 	cs = ansi_start;
 	}
@@ -97,7 +100,7 @@ ansi_parser(const char *newdata, size_t len)
 
 	// The parser
 	
-/* #line 101 "user/ansi_parser.c" */
+/* #line 104 "user/ansi_parser.c" */
 	{
 	const char *_acts;
 	unsigned int _nacts;
@@ -114,219 +117,268 @@ case 1:
 	goto tr0;
 case 2:
 	switch( (*p) ) {
-		case 55: goto tr3;
-		case 56: goto tr4;
+		case 35: goto tr3;
 		case 91: goto tr5;
 		case 93: goto tr6;
-		case 99: goto tr7;
+		case 107: goto tr7;
 	}
+	if ( (*p) < 65 ) {
+		if ( 48 <= (*p) && (*p) <= 57 )
+			goto tr4;
+	} else if ( (*p) > 90 ) {
+		if ( 97 <= (*p) && (*p) <= 122 )
+			goto tr4;
+	} else
+		goto tr4;
 	goto tr2;
 case 0:
 	goto _out;
-case 26:
+case 3:
+	if ( 48 <= (*p) && (*p) <= 57 )
+		goto tr8;
+	goto tr2;
+case 28:
 	if ( (*p) == 27 )
 		goto tr1;
 	goto tr0;
-case 3:
-	if ( (*p) == 59 )
-		goto tr10;
+case 4:
+	switch( (*p) ) {
+		case 59: goto tr11;
+		case 64: goto tr12;
+	}
 	if ( (*p) < 60 ) {
 		if ( (*p) > 47 ) {
 			if ( 48 <= (*p) && (*p) <= 57 )
-				goto tr9;
-		} else if ( (*p) >= 32 )
-			goto tr8;
-	} else if ( (*p) > 64 ) {
-		if ( (*p) > 90 ) {
-			if ( 97 <= (*p) && (*p) <= 122 )
-				goto tr11;
-		} else if ( (*p) >= 65 )
-			goto tr11;
-	} else
-		goto tr8;
-	goto tr2;
-case 4:
-	if ( (*p) == 59 )
 				goto tr10;
-	if ( (*p) < 65 ) {
-		if ( 48 <= (*p) && (*p) <= 57 )
+		} else if ( (*p) >= 32 )
 			goto tr9;
-	} else if ( (*p) > 90 ) {
-		if ( 97 <= (*p) && (*p) <= 122 )
-			goto tr11;
+	} else if ( (*p) > 63 ) {
+		if ( (*p) > 90 ) {
+			if ( 96 <= (*p) && (*p) <= 122 )
+				goto tr13;
+		} else if ( (*p) >= 65 )
+			goto tr13;
 	} else
-		goto tr11;
-	goto tr2;
-case 27:
+		goto tr9;
 	goto tr2;
 case 5:
-	switch( (*p) ) {
-		case 66: goto tr12;
-		case 84: goto tr13;
-		case 87: goto tr14;
-	}
-	goto tr2;
-case 6:
-	if ( (*p) == 84 )
-		goto tr15;
-	goto tr2;
-case 7:
-	if ( (*p) == 78 )
-		goto tr16;
-	goto tr2;
-case 8:
+	if ( (*p) == 59 )
+		goto tr11;
+	if ( (*p) < 64 ) {
 		if ( 48 <= (*p) && (*p) <= 57 )
-		goto tr17;
-	goto tr2;
-case 9:
-	if ( (*p) == 61 )
-		goto tr18;
-	goto tr2;
-case 10:
-	if ( (*p) == 27 )
-		goto tr2;
-	goto tr19;
-case 11:
-	switch( (*p) ) {
-		case 7: goto tr20;
-		case 27: goto tr21;
-	}
-	goto tr19;
-case 28:
-	switch( (*p) ) {
-		case 7: goto tr20;
-		case 27: goto tr21;
-	}
-	goto tr19;
-case 12:
-	if ( (*p) == 92 )
-		goto tr22;
+			goto tr10;
+	} else if ( (*p) > 90 ) {
+		if ( 96 <= (*p) && (*p) <= 122 )
+			goto tr13;
+	} else
+		goto tr13;
 	goto tr2;
 case 29:
 	goto tr2;
-case 13:
-	if ( (*p) == 73 )
+case 30:
+	if ( (*p) == 59 )
+		goto tr11;
+	if ( (*p) < 64 ) {
+		if ( 48 <= (*p) && (*p) <= 57 )
+			goto tr10;
+	} else if ( (*p) > 90 ) {
+		if ( 96 <= (*p) && (*p) <= 122 )
+			goto tr13;
+	} else
+		goto tr13;
+	goto tr2;
+case 6:
+	switch( (*p) ) {
+		case 48: goto tr14;
+		case 66: goto tr15;
+		case 84: goto tr16;
+		case 87: goto tr17;
+	}
+	goto tr2;
+case 7:
+	if ( (*p) == 59 )
+		goto tr18;
+	goto tr2;
+case 8:
+	switch( (*p) ) {
+		case 7: goto tr20;
+		case 27: goto tr21;
+	}
+	goto tr19;
+case 31:
+	switch( (*p) ) {
+		case 7: goto tr20;
+		case 27: goto tr21;
+	}
+	goto tr19;
+case 9:
+	if ( (*p) == 92 )
+		goto tr22;
+	goto tr2;
+case 32:
+	goto tr2;
+case 10:
+	if ( (*p) == 84 )
 		goto tr23;
 	goto tr2;
-case 14:
-	if ( (*p) == 84 )
+case 11:
+	if ( (*p) == 78 )
 		goto tr24;
 	goto tr2;
-case 15:
-	if ( (*p) == 76 )
+case 12:
+	if ( 48 <= (*p) && (*p) <= 57 )
 		goto tr25;
 	goto tr2;
-case 16:
-	if ( (*p) == 69 )
+case 13:
+	if ( (*p) == 61 )
 		goto tr26;
 	goto tr2;
-case 17:
-	if ( (*p) == 61 )
+case 14:
+	switch( (*p) ) {
+		case 7: goto tr28;
+		case 27: goto tr29;
+	}
 	goto tr27;
+case 33:
+	switch( (*p) ) {
+		case 7: goto tr28;
+		case 27: goto tr29;
+	}
+	goto tr27;
+case 15:
+	if ( (*p) == 92 )
+		goto tr30;
+	goto tr2;
+case 16:
+	if ( (*p) == 73 )
+		goto tr31;
+	goto tr2;
+case 17:
+	if ( (*p) == 84 )
+		goto tr32;
 	goto tr2;
 case 18:
-	if ( (*p) == 27 )
+	if ( (*p) == 76 )
+		goto tr33;
 	goto tr2;
-	goto tr28;
 case 19:
-	switch( (*p) ) {
-		case 7: goto tr29;
-		case 27: goto tr30;
-	}
-	goto tr28;
-case 30:
-	switch( (*p) ) {
-		case 7: goto tr29;
-		case 27: goto tr30;
-	}
-	goto tr28;
+	if ( (*p) == 69 )
+		goto tr34;
+	goto tr2;
 case 20:
-	if ( (*p) == 92 )
-		goto tr31;
+	if ( (*p) == 61 )
+		goto tr35;
 	goto tr2;
 case 21:
 	if ( 48 <= (*p) && (*p) <= 57 )
-		goto tr32;
+		goto tr36;
 	goto tr2;
 case 22:
 	if ( (*p) == 59 )
-		goto tr33;
+		goto tr37;
 	if ( 48 <= (*p) && (*p) <= 57 )
-		goto tr32;
+		goto tr36;
 	goto tr2;
 case 23:
 	if ( 48 <= (*p) && (*p) <= 57 )
-		goto tr34;
+		goto tr38;
 	goto tr2;
 case 24:
 	switch( (*p) ) {
-		case 7: goto tr35;
-		case 27: goto tr36;
+		case 7: goto tr39;
+		case 27: goto tr40;
 	}
 	if ( 48 <= (*p) && (*p) <= 57 )
-		goto tr34;
+		goto tr38;
 	goto tr2;
 case 25:
 	if ( (*p) == 92 )
-		goto tr35;
+		goto tr39;
+	goto tr2;
+case 26:
+	switch( (*p) ) {
+		case 7: goto tr42;
+		case 27: goto tr43;
+	}
+	goto tr41;
+case 34:
+	switch( (*p) ) {
+		case 7: goto tr42;
+		case 27: goto tr43;
+	}
+	goto tr41;
+case 27:
+	if ( (*p) == 92 )
+		goto tr44;
+	goto tr2;
+case 35:
 	goto tr2;
 	}
 
 	tr2: cs = 0; goto f0;
 	tr0: cs = 1; goto f1;
 	tr1: cs = 2; goto _again;
-	tr8: cs = 4; goto f7;
-	tr9: cs = 4; goto f8;
-	tr10: cs = 4; goto f9;
-	tr12: cs = 6; goto _again;
-	tr15: cs = 7; goto _again;
-	tr16: cs = 8; goto _again;
-	tr17: cs = 9; goto f8;
-	tr18: cs = 10; goto _again;
-	tr19: cs = 11; goto f11;
-	tr21: cs = 12; goto _again;
-	tr13: cs = 13; goto _again;
-	tr23: cs = 14; goto _again;
-	tr24: cs = 15; goto _again;
-	tr25: cs = 16; goto _again;
-	tr26: cs = 17; goto _again;
-	tr27: cs = 18; goto _again;
-	tr28: cs = 19; goto f11;
-	tr30: cs = 20; goto _again;
-	tr14: cs = 21; goto _again;
-	tr32: cs = 22; goto f8;
-	tr33: cs = 23; goto f9;
-	tr34: cs = 24; goto f8;
-	tr36: cs = 25; goto _again;
-	tr3: cs = 26; goto f2;
-	tr4: cs = 26; goto f3;
-	tr5: cs = 26; goto f4;
-	tr6: cs = 26; goto f5;
-	tr7: cs = 26; goto f6;
-	tr11: cs = 27; goto f10;
-	tr20: cs = 28; goto f12;
-	tr22: cs = 29; goto f13;
-	tr31: cs = 29; goto f15;
-	tr35: cs = 29; goto f16;
-	tr29: cs = 30; goto f14;
+	tr3: cs = 3; goto _again;
+	tr9: cs = 5; goto f7;
+	tr10: cs = 5; goto f8;
+	tr11: cs = 5; goto f9;
+	tr14: cs = 7; goto _again;
+	tr18: cs = 8; goto _again;
+	tr19: cs = 8; goto f12;
+	tr21: cs = 9; goto _again;
+	tr15: cs = 10; goto _again;
+	tr23: cs = 11; goto _again;
+	tr24: cs = 12; goto _again;
+	tr25: cs = 13; goto f8;
+	tr26: cs = 14; goto _again;
+	tr27: cs = 14; goto f12;
+	tr29: cs = 15; goto _again;
+	tr16: cs = 16; goto _again;
+	tr31: cs = 17; goto _again;
+	tr32: cs = 18; goto _again;
+	tr33: cs = 19; goto _again;
+	tr34: cs = 20; goto _again;
+	tr17: cs = 21; goto _again;
+	tr36: cs = 22; goto f8;
+	tr37: cs = 23; goto f9;
+	tr38: cs = 24; goto f8;
+	tr40: cs = 25; goto _again;
+	tr41: cs = 26; goto f12;
+	tr43: cs = 27; goto _again;
+	tr4: cs = 28; goto f2;
+	tr5: cs = 28; goto f3;
+	tr6: cs = 28; goto f4;
+	tr7: cs = 28; goto f5;
+	tr8: cs = 28; goto f6;
+	tr13: cs = 29; goto f11;
+	tr12: cs = 30; goto f10;
+	tr20: cs = 31; goto f13;
+	tr35: cs = 32; goto f5;
+	tr22: cs = 32; goto f14;
+	tr30: cs = 32; goto f16;
+	tr39: cs = 32; goto f17;
+	tr28: cs = 33; goto f15;
+	tr42: cs = 34; goto f13;
+	tr44: cs = 35; goto f14;
 
 	f1: _acts = _ansi_actions + 1; goto execFuncs;
-	f4: _acts = _ansi_actions + 3; goto execFuncs;
+	f3: _acts = _ansi_actions + 3; goto execFuncs;
 	f7: _acts = _ansi_actions + 5; goto execFuncs;
 	f8: _acts = _ansi_actions + 7; goto execFuncs;
 	f9: _acts = _ansi_actions + 9; goto execFuncs;
-	f10: _acts = _ansi_actions + 11; goto execFuncs;
+	f11: _acts = _ansi_actions + 11; goto execFuncs;
 	f0: _acts = _ansi_actions + 13; goto execFuncs;
-	f5: _acts = _ansi_actions + 15; goto execFuncs;
-	f16: _acts = _ansi_actions + 17; goto execFuncs;
-	f11: _acts = _ansi_actions + 19; goto execFuncs;
-	f15: _acts = _ansi_actions + 21; goto execFuncs;
-	f13: _acts = _ansi_actions + 23; goto execFuncs;
-	f6: _acts = _ansi_actions + 25; goto execFuncs;
-	f2: _acts = _ansi_actions + 27; goto execFuncs;
-	f3: _acts = _ansi_actions + 29; goto execFuncs;
-	f14: _acts = _ansi_actions + 31; goto execFuncs;
-	f12: _acts = _ansi_actions + 34; goto execFuncs;
+	f4: _acts = _ansi_actions + 15; goto execFuncs;
+	f5: _acts = _ansi_actions + 17; goto execFuncs;
+	f17: _acts = _ansi_actions + 19; goto execFuncs;
+	f12: _acts = _ansi_actions + 21; goto execFuncs;
+	f14: _acts = _ansi_actions + 23; goto execFuncs;
+	f16: _acts = _ansi_actions + 25; goto execFuncs;
+	f6: _acts = _ansi_actions + 27; goto execFuncs;
+	f2: _acts = _ansi_actions + 29; goto execFuncs;
+	f10: _acts = _ansi_actions + 31; goto execFuncs;
+	f13: _acts = _ansi_actions + 34; goto execFuncs;
+	f15: _acts = _ansi_actions + 37; goto execFuncs;
 
 execFuncs:
 	_nacts = *_acts++;
@@ -350,7 +402,7 @@ execFuncs:
 				csi_n[i] = 0;
 			}
 
-			{cs = 3;goto _again;}
+			{cs = 4;goto _again;}
 		}
 	break;
 	case 2:
@@ -404,61 +456,61 @@ execFuncs:
 			osc_bi = 0;
 			osc_buffer[0] = '\0';
 
-			{cs = 5;goto _again;}
+			{cs = 6;goto _again;}
 		}
 	break;
 	case 8:
-/* #line 150 "user/ansi_parser.rl" */
+/* #line 151 "user/ansi_parser.rl" */
+	{
+			osc_bi = 0;
+			osc_buffer[0] = '\0';
+			{cs = 26;goto _again;}
+		}
+	break;
+	case 9:
+/* #line 157 "user/ansi_parser.rl" */
 	{
 			apars_handle_OSC_SetScreenSize(csi_n[0], csi_n[1]);
 			{cs = 1;goto _again;}
 		}
 	break;
-	case 9:
-/* #line 155 "user/ansi_parser.rl" */
+	case 10:
+/* #line 162 "user/ansi_parser.rl" */
 	{
 			osc_buffer[osc_bi++] = (*p);
 		}
 	break;
-	case 10:
-/* #line 159 "user/ansi_parser.rl" */
+	case 11:
+/* #line 166 "user/ansi_parser.rl" */
 	{
 			osc_buffer[osc_bi++] = '\0';
 			apars_handle_OSC_SetTitle(osc_buffer);
 			{cs = 1;goto _again;}
 		}
 	break;
-	case 11:
-/* #line 165 "user/ansi_parser.rl" */
+	case 12:
+/* #line 172 "user/ansi_parser.rl" */
 	{
 			osc_buffer[osc_bi++] = '\0';
 			apars_handle_OSC_SetButton(csi_n[0], osc_buffer);
 			{cs = 1;goto _again;}
 		}
 	break;
-	case 12:
-/* #line 177 "user/ansi_parser.rl" */
-	{
-			// Reset screen
-			apars_handle_RESET_cmd();
-			{cs = 1;goto _again;}
-		}
-	break;
 	case 13:
-/* #line 183 "user/ansi_parser.rl" */
+/* #line 204 "user/ansi_parser.rl" */
 	{
-			apars_handle_saveCursorAttrs();
+			apars_handle_hashCode((*p));
 			{cs = 1;goto _again;}
 		}
 	break;
 	case 14:
-/* #line 188 "user/ansi_parser.rl" */
+/* #line 209 "user/ansi_parser.rl" */
 	{
-			apars_handle_restoreCursorAttrs();
+			apars_handle_shortCode((*p));
 			{cs = 1;goto _again;}
 		}
 	break;
-/* #line 462 "user/ansi_parser.c" */
+/* #line 514 "user/ansi_parser.c" */
 		}
 	}
 	goto _again;
@@ -484,7 +536,7 @@ _again:
 goto _again;}
 		}
 	break;
-/* #line 488 "user/ansi_parser.c" */
+/* #line 540 "user/ansi_parser.c" */
 		}
 	}
 	}
@@ -492,6 +544,8 @@ goto _again;}
 	_out: {}
 	}
 
-/* #line 208 "user/ansi_parser.rl" */
+/* #line 229 "user/ansi_parser.rl" */
 
 }
+
+// 'ESC k blah OSC_end' is a shortcut for setting title (k is defined in GNU screen as Title Definition String)

user/ansi_parser.h

@@ -9,14 +9,13 @@
 #define OSC_CHAR_MAX TERM_TITLE_LEN
 
 extern void apars_handle_badseq(void);
-extern void apars_handle_CSI(char leadchar, int *params, char keychar);
-extern void apars_handle_RESET_cmd(void);
 extern void apars_handle_plainchar(char c);
+extern void apars_handle_CSI(char leadchar, int *params, char keychar);
 extern void apars_handle_OSC_SetScreenSize(int rows, int cols);
-extern void apars_handle_saveCursorAttrs(void);
-extern void apars_handle_restoreCursorAttrs(void);
 extern void apars_handle_OSC_SetButton(int num, const char *buffer);
 extern void apars_handle_OSC_SetTitle(const char *buffer);
+extern void apars_handle_shortCode(char c);
+extern void apars_handle_hashCode(char c);
 
 /**
  * \brief Linear ANSI chars stream parser

user/ansi_parser.rl

@@ -127,7 +127,7 @@ ansi_parser(const char *newdata, size_t len)
 
 		CSI_body := ((32..47|60..64) @CSI_leading)?
 			((digit @CSI_digit)* ';' @CSI_semi)*
-			(digit @CSI_digit)* alpha @CSI_end $!errBadSeq;
+			(digit @CSI_digit)* (alpha|'`'|'@') @CSI_end $!errBadSeq;
 
 
 		# --- OSC commands (Operating System Commands) ---
@@ -147,6 +147,13 @@ ansi_parser(const char *newdata, size_t len)
 			fgoto OSC_body;
 		}
 
+		# collecting title string; this can also be entered by ESC k
+		action SetTitle_start {
+			osc_bi = 0;
+			osc_buffer[0] = '\0';
+			fgoto TITLE_body;
+		}
+
 		action OSC_resize {
 			apars_handle_OSC_SetScreenSize(csi_n[0], csi_n[1]);
 			fgoto main;
@@ -168,12 +175,16 @@ ansi_parser(const char *newdata, size_t len)
 			fgoto main;
 		}
 
+		# 0; is xterm title hack
 		OSC_body := (
-			("BTN" digit @CSI_digit '=' (NOESC @OSC_text_char)+ OSC_END @OSC_button) |
-			("TITLE=" (NOESC @OSC_text_char)+ OSC_END @OSC_title) |
+			("BTN" digit @CSI_digit '=' (NOESC @OSC_text_char)* OSC_END @OSC_button) |
+			("TITLE=" @SetTitle_start) |
+			("0;" (NOESC @OSC_text_char)* OSC_END @OSC_title) |
 			('W' (digit @CSI_digit)+ ';' @CSI_semi (digit @CSI_digit)+ OSC_END @OSC_resize)
 		) $!errBadSeq;
 
+		TITLE_body := (NOESC @OSC_text_char)* OSC_END @OSC_title $!errBadSeq;
+
 		action RESET_cmd {
 			// Reset screen
 			apars_handle_RESET_cmd();
@@ -190,16 +201,26 @@ ansi_parser(const char *newdata, size_t len)
 			fgoto main;
 		}
 
+		action HASH_code {
+			apars_handle_hashCode(fc);
+			fgoto main;
+		}
+
+		action SHORT_code {
+			apars_handle_shortCode(fc);
+			fgoto main;
+		}
+
 		# --- Main parser loop ---
 
 		main :=
 			(
 				(NOESC @plain_char)* ESC (
-					'[' @CSI_start |
-					']' @OSC_start |
-					'c' @RESET_cmd |
-			        '7' @CSI_SaveCursorAttrs |
-					'8' @CSI_RestoreCursorAttrs
+					('[' @CSI_start) |
+					(']' @OSC_start) |
+					('#' digit @HASH_code) |
+					('k' @SetTitle_start) |
+					([a-jl-zA-Z0-9] @SHORT_code)
 				)
 			)+ $!errBadSeq;
 
@@ -207,3 +228,5 @@ ansi_parser(const char *newdata, size_t len)
 #*/
 	}%%
 }
+
+// 'ESC k blah OSC_end' is a shortcut for setting title (k is defined in GNU screen as Title Definition String)

user/ansi_parser_callbacks.c

@@ -9,7 +9,8 @@
 #include "screen.h"
 #include "ansi_parser.h"
 #include "uart_driver.h"
-#include "persist.h"
+
+// screen manpage - https://www.gnu.org/software/screen/manual/html_node/Control-Sequences.html
 
 static char utf_collect[4];
 static int utf_i = 0;
@@ -93,6 +94,8 @@ apars_handle_CSI(char leadchar, int *params, char keychar)
 		CSI u	RCP – Restore Cursor Position
 		CSI ?25l	DECTCEM	Hides the cursor
 		CSI ?25h	DECTCEM	Shows the cursor
+
+	    and some others
 	*/
 
 	int n1 = params[0];
@@ -101,15 +104,22 @@ apars_handle_CSI(char leadchar, int *params, char keychar)
 
 	// defaults
 	switch (keychar) {
-		case 'A':
+		case 'A': // move
 		case 'B':
 		case 'C':
 		case 'D':
 		case 'E':
 		case 'F':
-		case 'G':
-		case 'S':
+		case 'G': // set X
+		case '`':
+		case 'S': // scrolling
 		case 'T':
+		case 'X': // clear in line
+		case 'd': // set Y
+		case 'L':
+		case 'M':
+		case '@':
+		case 'P':
 			if (n1 == 0) n1 = 1;
 			break;
 
@@ -127,60 +137,73 @@ apars_handle_CSI(char leadchar, int *params, char keychar)
 
 	switch (keychar) {
 		// CUU CUD CUF CUB
-		case 'A': screen_cursor_move(-n1, 0); break;
-		case 'B': screen_cursor_move(n1, 0);  break;
-		case 'C': screen_cursor_move(0, n1);  break;
-		case 'D': screen_cursor_move(0, -n1); break;
+		case 'A': screen_cursor_move(-n1, 0, false); break;
+		case 'B': screen_cursor_move(n1, 0, false);  break;
+		case 'C': screen_cursor_move(0, n1, false);  break;
+		case 'D': screen_cursor_move(0, -n1, false); break;
 
-		case 'E': // CNL
-			screen_cursor_move(n1, 0);
+		case 'E': // CNL - Cursor Next Line
+			screen_cursor_move(n1, 0, false);
 			screen_cursor_set_x(0);
 			break;
 
-		case 'F': // CPL
-			screen_cursor_move(-n1, 0);
+		case 'F': // CPL - Cursor Prev Line
+			screen_cursor_move(-n1, 0, false);
 			screen_cursor_set_x(0);
 			break;
 
-			// CHA
+			// Set X
 		case 'G':
-			screen_cursor_set_x(n1 - 1); break; // 1-based
+		case '`': // alternate code
+			screen_cursor_set_x(n1 - 1);
+			break; // 1-based
 
-			// SU, SD
+			// Set Y
+		case 'd':
+			screen_cursor_set_y(n1 - 1);
+			break; // 1-based
+
+			// clear in line
+		case 'X':
+			screen_clear_in_line(n1);
+			break; // 1-based
+
+			// SU, SD - scroll up/down
 		case 'S': screen_scroll_up(n1);	  break;
 		case 'T': screen_scroll_down(n1); break;
 
-			// CUP,HVP
+			// CUP,HVP - set position
 		case 'H':
 		case 'f':
-			screen_cursor_set(n1-1, n2-1); break; // 1-based
+			screen_cursor_set(n1-1, n2-1);
+			break; // 1-based
 
-		case 'J': // ED
+		case 'J': // ED - clear screen
 			if (n1 == 0) {
-				screen_clear(CLEAR_TO_CURSOR);
-			} else if (n1 == 1) {
 				screen_clear(CLEAR_FROM_CURSOR);
+			} else if (n1 == 1) {
+				screen_clear(CLEAR_TO_CURSOR);
 			} else {
 				screen_clear(CLEAR_ALL);
 				screen_cursor_set(0, 0);
 			}
 			break;
 
-		case 'K': // EL
+		case 'K': // EL - clear line
 			if (n1 == 0) {
-				screen_clear_line(CLEAR_TO_CURSOR);
-			} else if (n1 == 1) {
 				screen_clear_line(CLEAR_FROM_CURSOR);
+			} else if (n1 == 1) {
+				screen_clear_line(CLEAR_TO_CURSOR);
 			} else {
 				screen_clear_line(CLEAR_ALL);
 			}
 			break;
 
-			// SCP, RCP
+			// SCP, RCP - save/restore position
 		case 's': screen_cursor_save(0); break;
 		case 'u': screen_cursor_restore(0); break;
 
-		case 'n':
+		case 'n': // queries
 			if (n1 == 6) {
 				// Query cursor position
 				char buf[20];
@@ -197,7 +220,7 @@ apars_handle_CSI(char leadchar, int *params, char keychar)
 
 			// DECTCEM feature enable / disable
 
-		case 'h':
+		case 'h': // feature enable
 			if (leadchar == '?') {
 				if (n1 == 25) {
 					screen_cursor_enable(1);
@@ -207,7 +230,7 @@ apars_handle_CSI(char leadchar, int *params, char keychar)
 			}
 			break;
 
-		case 'l':
+		case 'l': // feature disable
 			if (leadchar == '?') {
 				if (n1 == 25) {
 					screen_cursor_enable(0);
@@ -217,47 +240,84 @@ apars_handle_CSI(char leadchar, int *params, char keychar)
 			}
 			break;
 
-		case 'm': // SGR
+		case 'm': // SGR - graphics rendition aka attributes
 			// iterate arguments
 			for (int i = 0; i < CSI_N_MAX; i++) {
 				int n = params[i];
 
 				if (i == 0 && n == 0) { // reset SGR
 					screen_reset_cursor(); // resets colors, inverse and bold.
-					break; // cannot combine reset with others
+					break; // cannot combine reset with others - discard
 				}
-				else if (n >= 30 && n <= 37) screen_set_fg(n-30); // ANSI normal fg
-				else if (n >= 40 && n <= 47) screen_set_bg(n-40); // ANSI normal bg
-				else if (n == 39) screen_set_fg(7); // default fg
-				else if (n == 49) screen_set_bg(false); // default bg
+				else if (n >= 30 && n <= 37) screen_set_fg((Color) (n - 30)); // ANSI normal fg
+				else if (n >= 40 && n <= 47) screen_set_bg((Color) (n - 40)); // ANSI normal bg
+				else if (n == 39) screen_set_fg(termconf_scratch.default_fg); // default fg
+				else if (n == 49) screen_set_bg(termconf_scratch.default_bg); // default bg
 				else if (n == 7) screen_inverse(true); // inverse
 				else if (n == 27) screen_inverse(false); // positive
 				else if (n == 1) screen_set_bold(true); // bold
 				else if (n == 21 || n == 22) screen_set_bold(false); // bold off
-				else if (n >= 90 && n <= 97) screen_set_fg(n-90+8); // AIX bright fg
-				else if (n >= 100 && n <= 107) screen_set_bg(n-100+8); // AIX bright bg
+				else if (n >= 90 && n <= 97) screen_set_fg((Color) (n - 90 + 8)); // AIX bright fg
+				else if (n >= 100 && n <= 107) screen_set_bg((Color) (n - 100 + 8)); // AIX bright bg
 			}
 			break;
+
+		case 't': // SunView code to set screen size (from GNU Screen)
+			screen_resize(n1, n2);
+			break;
+
+		case 'L':
+			screen_insert_lines(n1);
+			break;
+
+		case 'M':
+			screen_delete_lines(n1);
+			break;
+
+		case '@':
+			screen_insert_characters(n1);
+			break;
+
+		case 'P':
+			screen_delete_characters(n1);
+			break;
 	}
 }
 
-void ICACHE_FLASH_ATTR apars_handle_saveCursorAttrs(void)
+/** codes in the format ESC # n */
+void ICACHE_FLASH_ATTR apars_handle_hashCode(char c)
 {
-	screen_cursor_save(1);
+	switch(c) {
+		case '8':
+			screen_fill_with_E();
+			break;
+	}
 }
 
-void ICACHE_FLASH_ATTR apars_handle_restoreCursorAttrs(void)
-{
-	screen_cursor_restore(1);
-}
-
-/**
- * \brief Handle a request to reset the display device
- */
-void ICACHE_FLASH_ATTR
-apars_handle_RESET_cmd(void)
+/** those are single-character escape codes (ESC x) */
+void ICACHE_FLASH_ATTR apars_handle_shortCode(char c)
 {
+	switch(c) {
+		case 'c': // screen reset
 			screen_reset();
+			break;
+		case '7': // save cursor + attrs
+			screen_cursor_save(true);
+			break;
+		case '8': // restore cursor + attrs
+			screen_cursor_restore(true);
+			break;
+		case 'E': // same as CR LF
+			screen_cursor_move(1, 0, false);
+			screen_cursor_set_x(0);
+			break;
+		case 'D': // move cursor down, scroll screen up if needed
+			screen_cursor_move(1, 0, true);
+			break;
+		case 'M': // move cursor up, scroll screen down if needed
+			screen_cursor_move(-1, 0, true);
+			break;
+	}
 }
 
 /**

user/ansi_parser_callbacks.h

@@ -2,13 +2,12 @@
 #define ANSI_PARSER_CALLBACKS_H
 
 void apars_handle_badseq(void);
-void apars_handle_CSI(char leadchar, int *params, char keychar);
-void apars_handle_RESET_cmd(void);
 void apars_handle_plainchar(char c);
+void apars_handle_CSI(char leadchar, int *params, char keychar);
 void apars_handle_OSC_SetScreenSize(int rows, int cols);
-void apars_handle_saveCursorAttrs(void);
-void apars_handle_restoreCursorAttrs(void);
 void apars_handle_OSC_SetButton(int num, const char *buffer);
 void apars_handle_OSC_SetTitle(const char *buffer);
+void apars_handle_shortCode(char c);
+void apars_handle_hashCode(char c);
 
 #endif //ESP_VT100_FIRMWARE_ANSI_PARSER_CALLBACKS_H

user/cgi_term_cfg.c

@@ -22,6 +22,8 @@ cgiTermCfgSetParams(HttpdConnData *connData)
 	char redir_url_buf[100];
 	int n, w, h;
 
+	bool shall_clear_screen = false;
+
 	char *redir_url = redir_url_buf;
 	redir_url += sprintf(redir_url, SET_REDIR_ERR);
 	// we'll test if anything was printed by looking for \0 in failed_keys_buf
@@ -41,8 +43,11 @@ cgiTermCfgSetParams(HttpdConnData *connData)
 				h = atoi(buff);
 				if (h > 1) {
 					if (w * h <= MAX_SCREEN_SIZE) {
+						if (termconf->width != w || termconf->height != h) {
 							termconf->width = w;
 							termconf->height = h;
+							shall_clear_screen = true;
+						}
 					} else {
 						warn("Bad dimensions: %d x %d (total %d)", w, h, w*h);
 						redir_url += sprintf(redir_url, "term_width,term_height,");
@@ -66,7 +71,10 @@ cgiTermCfgSetParams(HttpdConnData *connData)
 		dbg("Screen default BG: %s", buff);
 		n = atoi(buff);
 		if (n >= 0 && n < 16) {
+			if (termconf->default_bg != n) {
 				termconf->default_bg = (u8) n;
+				shall_clear_screen = true;
+			}
 		} else {
 			warn("Bad color %s", buff);
 			redir_url += sprintf(redir_url, "default_bg,");
@@ -88,7 +96,10 @@ cgiTermCfgSetParams(HttpdConnData *connData)
 		dbg("Screen default FG: %s", buff);
 		n = atoi(buff);
 		if (n >= 0 && n < 16) {
+			if (termconf->default_fg != n) {
 				termconf->default_fg = (u8) n;
+				shall_clear_screen = true;
+			}
 		} else {
 			warn("Bad color %s", buff);
 			redir_url += sprintf(redir_url, "default_fg,");
@@ -123,9 +134,14 @@ cgiTermCfgSetParams(HttpdConnData *connData)
 		// All was OK
 		info("Set term params - success, saving...");
 
-		terminal_apply_settings();
 		persist_store();
 
+		if (shall_clear_screen) {
+			terminal_apply_settings();
+		} else {
+			terminal_apply_settings_noclear();
+		}
+
 		httpdRedirect(connData, SET_REDIR_SUC);
 	} else {
 		warn("Some settings did not validate, asking for correction");

user/screen.c

@@ -31,6 +31,12 @@ void terminal_restore_defaults(void)
  * Apply settings after eg. restore from defaults
  */
 void terminal_apply_settings(void)
+{
+	terminal_apply_settings_noclear();
+	screen_init();
+}
+
+void terminal_apply_settings_noclear(void)
 {
 	memcpy(&termconf_scratch, termconf, sizeof(TerminalConfigBundle));
 	if (W*H >= MAX_SCREEN_SIZE) {
@@ -39,9 +45,9 @@ void terminal_apply_settings(void)
 		terminal_restore_defaults();
 		persist_store();
 		memcpy(&termconf_scratch, termconf, sizeof(TerminalConfigBundle));
-	}
 		screen_init();
 	}
+}
 
 /**
  * Highest permissible value of the color attribute
@@ -116,14 +122,18 @@ clear_range(unsigned int from, unsigned int to)
 	if (to >= W*H) to = W*H-1;
 	Color fg = cursor.inverse ? cursor.bg : cursor.fg;
 	Color bg = cursor.inverse ? cursor.fg : cursor.bg;
+
+	Cell sample;
+	sample.c[0] = ' ';
+	sample.c[1] = 0;
+	sample.c[2] = 0;
+	sample.c[3] = 0;
+	sample.fg = fg;
+	sample.bg = bg;
+	sample.bold = false;
+
 	for (unsigned int i = from; i <= to; i++) {
-		screen[i].c[0] = ' ';
-		screen[i].c[1] = 0;
-		screen[i].c[2] = 0;
-		screen[i].c[3] = 0;
-		screen[i].fg = fg;
-		screen[i].bg = bg;
-		screen[i].bold = false;
+		memcpy(&screen[i], &sample, sizeof(Cell));
 	}
 }
 
@@ -230,10 +240,121 @@ screen_clear_line(ClearMode mode)
 	NOTIFY_DONE();
 }
 
+void ICACHE_FLASH_ATTR
+screen_clear_in_line(unsigned int count)
+{
+	if (cursor.x + count >= W) {
+		screen_clear_line(CLEAR_FROM_CURSOR);
+	}
+	else {
+		NOTIFY_LOCK();
+		clear_range(cursor.y * W + cursor.x, cursor.y * W + cursor.x + count - 1);
+		NOTIFY_DONE();
+	}
+}
+
+void ICACHE_FLASH_ATTR
+screen_fill_with_E(void)
+{
+	NOTIFY_LOCK();
+	Cell sample;
+	sample.c[0] = 'E';
+	sample.c[1] = 0;
+	sample.c[2] = 0;
+	sample.c[3] = 0;
+	sample.fg = termconf_scratch.default_fg;
+	sample.bg = termconf_scratch.default_bg;
+	sample.bold = false;
+
+	for (unsigned int i = 0; i <= W*H-1; i++) {
+		memcpy(&screen[i], &sample, sizeof(Cell));
+	}
+	NOTIFY_DONE();
+}
+
 //endregion
 
 //region Screen manipulation
 
+void screen_insert_lines(unsigned int lines)
+{
+	NOTIFY_LOCK();
+	// shift the following lines
+	int targetStart = cursor.y + lines;
+	if (targetStart >= H) {
+		targetStart = H;
+	} else {
+		// do the moving
+		for (int i = H-1; i >= targetStart; i--) {
+			memcpy(screen+i*W, screen+(i-lines)*W, sizeof(Cell)*W);
+		}
+	}
+
+	// clear the first line
+	screen_clear_line(CLEAR_ALL);
+	// copy it to the rest of the cleared region
+	for (int i = cursor.y+1; i < targetStart; i++) {
+		memcpy(screen+i*W, screen+cursor.y*W, sizeof(Cell)*W);
+	}
+	NOTIFY_DONE();
+}
+
+void screen_delete_lines(unsigned int lines)
+{
+	NOTIFY_LOCK();
+	// shift lines up
+	int targetEnd = H - 1 - lines;
+	if (targetEnd <= cursor.y) {
+		targetEnd = cursor.y;
+	} else {
+		// do the moving
+		for (int i = cursor.y; i <= targetEnd; i++) {
+			memcpy(screen+i*W, screen+(i+lines)*W, sizeof(Cell)*W);
+		}
+	}
+
+	// clear the rest
+	clear_range(targetEnd*W, W*H-1);
+	NOTIFY_DONE();
+}
+
+void screen_insert_characters(unsigned int count)
+{
+	NOTIFY_LOCK();
+	int targetStart = cursor.x + count;
+	if (targetStart >= W) {
+		targetStart = W-1;
+	} else {
+		// do the moving
+		for (int i = W-1; i >= targetStart; i--) {
+			memcpy(screen+cursor.y*W+i, screen+cursor.y*W+(i-count), sizeof(Cell));
+		}
+	}
+
+	clear_range(cursor.y*W+cursor.x, cursor.y*W+targetStart-1);
+	NOTIFY_DONE();
+}
+
+void screen_delete_characters(unsigned int count)
+{
+	NOTIFY_LOCK();
+	int targetEnd = W - count;
+	if (targetEnd > cursor.x) {
+		// do the moving
+		for (int i = cursor.x; i <= targetEnd; i++) {
+			memcpy(screen+cursor.y*W+i, screen+cursor.y*W+(i+count), sizeof(Cell));
+		}
+	}
+
+	if (targetEnd <= cursor.x) {
+		screen_clear_line(CLEAR_FROM_CURSOR);
+	}
+	else {
+		clear_range(cursor.y * W + (W - count), (cursor.y + 1) * W - 1);
+	}
+	NOTIFY_DONE();
+}
+
 /**
  * Change the screen size
  *
@@ -373,7 +494,7 @@ screen_cursor_set_y(int y)
  * Relative cursor move
  */
 void ICACHE_FLASH_ATTR
-screen_cursor_move(int dy, int dx)
+screen_cursor_move(int dy, int dx, bool scroll)
 {
 	NOTIFY_LOCK();
 	int move;
@@ -386,13 +507,13 @@ screen_cursor_move(int dy, int dx)
 	if (cursor.y < 0) {
 		move = -cursor.y;
 		cursor.y = 0;
-		screen_scroll_down((unsigned int)move);
+		if (scroll) screen_scroll_down((unsigned int)move);
 	}
 
 	if (cursor.y >= H) {
 		move = cursor.y - (H - 1);
 		cursor.y = H - 1;
-		screen_scroll_up((unsigned int)move);
+		if (scroll) screen_scroll_up((unsigned int)move);
 	}
 
 	NOTIFY_DONE();
@@ -555,7 +676,7 @@ screen_putchar(const char *ch)
 			goto done;
 
 		case '\n':
-			screen_cursor_move(1, 0);
+			screen_cursor_move(1, 0, true); // can scroll
 			goto done;
 
 		case 8: // BS

user/screen.h

@@ -70,6 +70,7 @@ extern TerminalConfigBundle termconf_scratch;
 
 void terminal_restore_defaults(void);
 void terminal_apply_settings(void);
+void terminal_apply_settings_noclear(void); // the same, but with no screen reset / init
 
 /**
  * Maximum screen size (determines size of the static data array)
@@ -89,7 +90,6 @@ httpd_cgi_state screenSerializeToBuffer(char *buffer, size_t buf_len, void **dat
 
 void screenSerializeLabelsToBuffer(char *buffer, size_t buf_len);
 
-
 typedef struct {
 	u8 lsb;
 	u8 msb;
@@ -100,10 +100,8 @@ void encode2B(u16 number, WordB2 *stru);
 
 /** Init the screen */
 void screen_init(void);
-
 /** Change the screen size */
 void screen_resize(int rows, int cols);
-
 /** Check if coord is valid */
 bool screen_isCoordValid(int y, int x);
 
@@ -111,48 +109,45 @@ bool screen_isCoordValid(int y, int x);
 
 /** Screen reset to default state */
 void screen_reset(void);
-
-/** Clear entire screen, set all to 7 on 0 */
+/** Clear entire screen */
 void screen_clear(ClearMode mode);
-
-/** Line reset to gray-on-white, empty */
+/** Clear line */
 void screen_clear_line(ClearMode mode);
-
+/** Clear part of line */
+void screen_clear_in_line(unsigned int count);
 /** Shift screen upwards */
 void screen_scroll_up(unsigned int lines);
-
 /** Shift screen downwards */
 void screen_scroll_down(unsigned int lines);
+/** esc # 8 - fill entire screen with E of default colors */
+void screen_fill_with_E(void);
+
+// --- insert / delete ---
+void screen_insert_lines(unsigned int lines);
+void screen_delete_lines(unsigned int lines);
+void screen_insert_characters(unsigned int count);
+void screen_delete_characters(unsigned int count);
 
 // --- Cursor control ---
 
 /** Set cursor position */
 void screen_cursor_set(int y, int x);
-
 /** Read cursor pos to given vars */
 void screen_cursor_get(int *y, int *x);
-
 /** Set cursor X position */
 void screen_cursor_set_x(int x);
-
 /** Set cursor Y position */
 void screen_cursor_set_y(int y);
-
 /** Reset cursor attribs */
 void screen_reset_cursor(void);
-
 /** Relative cursor move */
-void screen_cursor_move(int dy, int dx);
-
+void screen_cursor_move(int dy, int dx, bool scroll);
 /** Save the cursor pos */
 void screen_cursor_save(bool withAttrs);
-
 /** Restore the cursor pos */
 void screen_cursor_restore(bool withAttrs);
-
 /** Enable cursor display */
 void screen_cursor_enable(bool enable);
-
 /** Enable auto wrap */
 void screen_wrap_enable(bool enable);
 
@@ -160,20 +155,15 @@ void screen_wrap_enable(bool enable);
 
 /** Set cursor foreground color */
 void screen_set_fg(Color color);
-
 /** Set cursor background coloor */
 void screen_set_bg(Color color);
-
 /** make foreground bright */
 void screen_set_bold(bool bold);
-
 /** Set cursor foreground and background color */
 void screen_set_colors(Color fg, Color bg);
-
 /** Invert colors */
 void screen_inverse(bool inverse);
 
-
 /**
  * Set a character in the cursor color, move to right with wrap.
  * The character may be ASCII (then only one char is used), or

user/user_main.h

@@ -1,7 +1,7 @@
 #ifndef USER_MAIN_H_H
 #define USER_MAIN_H_H
 
-#define FIRMWARE_VERSION "0.6.2+" GIT_HASH
+#define FIRMWARE_VERSION "0.6.5+" GIT_HASH
 #define TERMINAL_GITHUB_REPO "https://github.com/MightyPork/esp-vt100-firmware"
 
 #endif //USER_MAIN_H_H