From 242adb20f36a4bc4460f35d1be378427d33f2ab4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=B4me=20Duval?= <jerome.duval@gmail.com>
Date: Wed, 6 Jan 2021 21:14:45 +0100
Subject: [PATCH] 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 | 11 ++++++++++-
 src/apps/terminal/BasicTerminalBuffer.h   |  3 +++
 src/apps/terminal/TermParse.cpp           | 12 ++++++++++++
 src/apps/terminal/VTPrsTbl.c              |  2 +-
 src/apps/terminal/VTparse.h               |  1 +
 5 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/src/apps/terminal/BasicTerminalBuffer.cpp b/src/apps/terminal/BasicTerminalBuffer.cpp
index 43e3629e2b..06dfd6cad5 100644
--- a/src/apps/terminal/BasicTerminalBuffer.cpp
+++ b/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
diff --git a/src/apps/terminal/BasicTerminalBuffer.h b/src/apps/terminal/BasicTerminalBuffer.h
index c1ad050178..418f014a1c 100644
--- a/src/apps/terminal/BasicTerminalBuffer.h
+++ b/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;
 };
diff --git a/src/apps/terminal/TermParse.cpp b/src/apps/terminal/TermParse.cpp
index 0a2b71ae9d..d925ade1fc 100644
--- a/src/apps/terminal/TermParse.cpp
+++ b/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;
 			}
diff --git a/src/apps/terminal/VTPrsTbl.c b/src/apps/terminal/VTPrsTbl.c
index 62e85e9e98..ac43bb9396 100644
--- a/src/apps/terminal/VTPrsTbl.c
+++ b/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,
diff --git a/src/apps/terminal/VTparse.h b/src/apps/terminal/VTparse.h
index b0342a2a6e..c93ab21b77 100644
--- a/src/apps/terminal/VTparse.h
+++ b/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