Terminal: implement ECMA-48 "REP"

fix #16724

Change-Id: Ie9f8252393a65a0101a6d78db2360f48bb52bc73
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3607
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

src/apps/terminal/BasicTerminalBuffer.cpp

@@ -121,7 +121,8 @@ BasicTerminalBuffer::BasicTerminalBuffer()
 	fSavedOriginMode(false),
 	fTabStops(NULL),
 	fEncoding(M_UTF8),
-	fCaptureFile(-1)
+	fCaptureFile(-1),
+	fLast()
 {
 }
 
@@ -625,6 +626,7 @@ BasicTerminalBuffer::InsertChar(UTF8Char c)
 {
 //debug_printf("BasicTerminalBuffer::InsertChar('%.*s' (%d), %#lx)\n",
 //(int)c.ByteCount(), c.bytes, c.bytes[0], attributes);
+	fLast = c;
 	int32 width = c.IsFullWidth() ? FULL_WIDTH : HALF_WIDTH;
 
 	if (fSoftWrappedCursor || (fCursor.x + width) > fWidth)
@@ -1857,4 +1859,11 @@ BasicTerminalBuffer::CaptureChar(char ch)
 		write(fCaptureFile, &ch, 1);
 }
 
+
+void
+BasicTerminalBuffer::InsertLastChar()
+{
+	InsertChar(fLast);
+}
+
 #endif

src/apps/terminal/BasicTerminalBuffer.h

@@ -141,6 +141,7 @@ public:
 			void				SetInsertMode(int flag);
 			void				InsertSpace(int32 num);
 			void				InsertLines(int32 numLines);
+			void				InsertLastChar();
 
 			// delete chars/lines
 	inline	void				EraseChars(int32 numChars);
@@ -250,6 +251,8 @@ protected:
 			int					fEncoding;
 			int					fCaptureFile;
 
+			UTF8Char			fLast;
+
 			// listener/dirty region management
 			TerminalBufferDirtyInfo fDirtyInfo;
 };

src/apps/terminal/TermParse.cpp

@@ -1213,6 +1213,18 @@ TermParse::EscParse()
 					fBuffer->MoveCursorUp(row);
 					parsestate = groundtable;
 					break;
+
+				case CASE_REP:		// ESC [...b repeat last graphic char
+				{
+					int repetitions = param[0];
+					int maxRepetitions = fBuffer->Width() * fBuffer->Height();
+					if (repetitions > maxRepetitions)
+						repetitions = maxRepetitions;
+					for (int i = 0; i < repetitions; i++)
+						fBuffer->InsertLastChar();
+					parsestate = groundtable;
+					break;
+				}
 				default:
 					break;
 			}

src/apps/terminal/VTPrsTbl.c

@@ -1119,7 +1119,7 @@ CASE_GROUND_STATE,
 /*	`		a		b		c	*/
 CASE_GROUND_STATE,
 CASE_GROUND_STATE,
-CASE_GROUND_STATE,
+CASE_REP,
 CASE_DA1,
 /*	d		e		f		g	*/
 CASE_VPA,

src/apps/terminal/VTparse.h

@@ -101,3 +101,4 @@
 #define CASE_CFT 98
 #define CASE_INDEX 99
 #define CASE_NEXT_LINE 100
+#define CASE_REP 101