Backported commit 66c83048 from KDE's Konsole source code.

66c830484c
This relates to issue TDE/tde#71.

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>

-------------------------------------------------------------
Original commit info:
From: Luis Alves <luisalves05@gmail.com>
Date: Wed, 10 Jun 2020 17:34:15 -0300
Subject: Add new ANSI sequences CNL and CPL

- It implements Cursor Next Line (CNL) sequence.
- It implments Cursor Previous Line (CPL) sequence.
- Ex: echo -e "Hello\e[3EWorld" or echo -e "Hello\e[3FWorld"
-------------------------------------------------------------

konsole/konsole/TEScreen.cpp

@@ -192,6 +192,43 @@ void TEScreen::cursorRight(int n)
     Set top and bottom margin.
 */
 
+void TEScreen::cursorNextLine(int n)
+//=CNL
+{
+	if (n == 0)
+	{
+		n = 1; // Default
+	}
+	cuX = 0;
+	while (n > 0)
+	{
+		if (cuY < lines - 1)
+		{
+			cuY += 1;
+		}
+		n--;
+	}
+
+}
+
+void TEScreen::cursorPrevLine(int n)
+//=CPL
+{
+	if (n == 0)
+	{
+		n = 1; // Default
+	}
+	cuX = 0;
+	while (n > 0)
+	{
+		if (cuY  > 0)
+		{
+			cuY -= 1;
+		}
+		n--;
+	}
+}
+
 void TEScreen::setMargins(int top, int bot)
 //=STBM
 {

konsole/konsole/TEScreen.h

@@ -52,14 +52,16 @@ public: // these are all `Screen' operations
     //
     // Cursor Movement
     //
-    void cursorUp    (int n);
+    void cursorUp      (int n);
-    void cursorDown  (int n);
+    void cursorDown    (int n);
-    void cursorLeft  (int n);
+    void cursorLeft    (int n);
-    void cursorRight (int n);
+    void cursorRight   (int n);
-    void setCursorY  (int y);
+    void cursorNextLine(int n);
-    void setCursorX  (int x);
+    void cursorPrevLine(int n);
-    void setCursorYX (int y, int x);
+    void setCursorY    (int y);
-    void setMargins  (int t, int b);
+    void setCursorX    (int x);
+    void setCursorYX   (int y, int x);
+    void setMargins    (int t, int b);
     //
     // Cursor Movement with Scrolling
     //

konsole/konsole/TEmuVt102.cpp

@@ -172,7 +172,7 @@ void TEmuVt102::reset()
 // Tokens ------------------------------------------------------------------ --
 
 /*
-   Since the tokens are the central notion if this section, we've put them
+   Since the tokens are the central notion in this section, we've put them
    in front. They provide the syntactical elements used to represent the
    terminals operations as byte sequences.
 
@@ -267,7 +267,7 @@ void TEmuVt102::initTokenizer()
   for(i =  0;                      i < 256; i++) tbl[ i]  = 0;
   for(i =  0;                      i <  32; i++) tbl[ i] |= CTL;
   for(i = 32;                      i < 256; i++) tbl[ i] |= CHR;
-  for(s = (UINT8*)"@ABCDGHILMPSTXZbcdfry"; *s; s++) tbl[*s] |= CPN;
+  for(s = (UINT8*)"@ABCDEFGHILMPSTXZbcdfry"; *s; s++) tbl[*s] |= CPN;
 // resize = \e[8;<row>;<col>t
   for(s = (UINT8*)"t"; *s; s++) tbl[*s] |= CPS;
   for(s = (UINT8*)"0123456789"        ; *s; s++) tbl[*s] |= DIG;
@@ -621,6 +621,8 @@ switch( N )
     case TY_CSI_PN('B'      ) : scr->cursorDown           (p         ); break; //VT100
     case TY_CSI_PN('C'      ) : scr->cursorRight          (p         ); break; //VT100
     case TY_CSI_PN('D'      ) : scr->cursorLeft           (p         ); break; //VT100
+    case TY_CSI_PN('E'      ) : scr->cursorNextLine       (p         ); break; //VT100
+    case TY_CSI_PN('F'      ) : scr->cursorPrevLine       (p         ); break; //VT100
     case TY_CSI_PN('G'      ) : scr->setCursorX           (p         ); break; //LINUX
     case TY_CSI_PN('H'      ) : scr->setCursorYX          (p,       q); break; //VT100
     case TY_CSI_PN('I'      ) : scr->Tabulate             (p         ); break;