From cf332a325dafe7e9ed6d87df9dcec29149c5042c Mon Sep 17 00:00:00 2001
From: "Roberto E. Vargas Caballero" <k0ga@shike2.com>
Date: Fri, 31 Jan 2014 21:53:53 +0100
Subject: [PATCH] Add MC for a single line

This sequence print the current line. It is different to the
'printer on' sequence, where all the characters that arrive to the
terminal are printer. Here only the ascii characters are printed.
---
 st.c | 41 ++++++++++++++++++++++++++++++++---------
 1 file changed, 32 insertions(+), 9 deletions(-)

diff --git a/st.c b/st.c
index 314bf3f..e60643c 100644
--- a/st.c
+++ b/st.c
@@ -356,6 +356,8 @@ static void strparse(void);
 static void strreset(void);
 
 static int tattrset(int);
+static void tprinter(char *s, size_t len);
+static void tdumpline(int);
 static void tclearregion(int, int, int, int);
 static void tcursor(int);
 static void tdeletechar(int);
@@ -470,7 +472,7 @@ static STREscape strescseq;
 static int cmdfd;
 static pid_t pid;
 static Selection sel;
-static int iofd;
+static int iofd = STDOUT_FILENO;
 static char **opt_cmd = NULL;
 static char *opt_io = NULL;
 static char *opt_title = NULL;
@@ -1985,6 +1987,8 @@ csihandle(void) {
 		switch(csiescseq.arg[0]) {
 		case 0:
 		case 1:
+			tdumpline(term.c.y);
+			break;
 		case 4:
 			term.mode &= ~MODE_PRINT;
 			break;
@@ -2265,6 +2269,31 @@ strreset(void) {
 	memset(&strescseq, 0, sizeof(strescseq));
 }
 
+void
+tprinter(char *s, size_t len) {
+	if(iofd != -1 && xwrite(iofd, s, len) < 0) {
+		fprintf(stderr, "Error writing in %s:%s\n",
+			opt_io, strerror(errno));
+		close(iofd);
+		iofd = -1;
+	}
+}
+
+void
+tdumpline(int n) {
+	Glyph *bp, *end;
+
+	bp = &term.line[n][0];
+	end = &bp[term.col-1];
+	while(end > bp && !strcmp(" ", end->c))
+		--end;
+	if(bp != end || strcmp(bp->c, " ")) {
+		for( ;bp <= end; ++bp)
+			tprinter(bp->c, strlen(bp->c));
+	}
+	tprinter("\n", 1);
+}
+
 void
 tputtab(bool forward) {
 	uint x = term.c.x;
@@ -2346,14 +2375,8 @@ tputc(char *c, int len) {
 		width = wcwidth(u8char);
 	}
 
-	if(IS_SET(MODE_PRINT) && iofd != -1) {
-		if(xwrite(iofd, c, len) < 0) {
-			fprintf(stderr, "Error writing in %s:%s\n",
-				opt_io, strerror(errno));
-			close(iofd);
-			iofd = -1;
-		}
-	}
+	if(IS_SET(MODE_PRINT))
+		tprinter(c, len);
 
 	/*
 	 * STR sequences must be checked before anything else