From da13ef12463d1870caed94584db464d68c6b3182 Mon Sep 17 00:00:00 2001
From: Luke Smith <luke@lukesmith.xyz>
Date: Wed, 8 May 2019 15:29:33 -0400
Subject: external pipe eternal

---
 st.c | 27 +++++++++++++++++++++++----
 1 file changed, 23 insertions(+), 4 deletions(-)

(limited to 'st.c')

diff --git a/st.c b/st.c
index bcb3444..21c6739 100644
--- a/st.c
+++ b/st.c
@@ -48,6 +48,8 @@
 				term.scr + HISTSIZE + 1) % HISTSIZE] : \
 				term.line[(y) - term.scr])
 
+#define TLINE_HIST(y)           ((y) <= HISTSIZE-term.row+2 ? term.hist[(y)] : term.line[(y-HISTSIZE+term.row-3)])
+
 /* constants */
 #define ISO14755CMD		"dmenu -w \"$WINDOWID\" -p codepoint: </dev/null"
 
@@ -429,6 +431,20 @@ tlinelen(int y)
 	return i;
 }
 
+int
+tlinehistlen(int y)
+{
+	int i = term.col;
+
+	if (TLINE_HIST(y)[i - 1].mode & ATTR_WRAP)
+		return i;
+
+	while (i > 0 && TLINE_HIST(y)[i - 1].u == ' ')
+		--i;
+
+	return i;
+}
+
 void
 selstart(int col, int row, int snap)
 {
@@ -2059,16 +2075,19 @@ externalpipe(const Arg *arg)
 	/* ignore sigpipe for now, in case child exists early */
 	oldsigpipe = signal(SIGPIPE, SIG_IGN);
 	newline = 0;
-	for (n = 0; n < term.row; n++) {
-		bp = term.line[n];
-		lastpos = MIN(tlinelen(n) + 1, term.col) - 1;
+	/* modify externalpipe patch to pipe history too      */
+	for (n = 0; n <= HISTSIZE + 2; n++) {
+		bp = TLINE_HIST(n);
+		lastpos = MIN(tlinehistlen(n) +1, term.col) - 1;
 		if (lastpos < 0)
 			break;
+		if (lastpos == 0)
+			continue;
 		end = &bp[lastpos + 1];
 		for (; bp < end; ++bp)
 			if (xwrite(to[1], buf, utf8encode(bp->u, buf)) < 0)
 				break;
-		if ((newline = term.line[n][lastpos].mode & ATTR_WRAP))
+		if ((newline = TLINE_HIST(n)[lastpos].mode & ATTR_WRAP))
 			continue;
 		if (xwrite(to[1], "\n", 1) < 0)
 			break;
-- 
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