From 600a5896d1ce6706f480a6346f3e3fe1c74c1b90 Mon Sep 17 00:00:00 2001
From: Timothy Warren <twarren@nabancard.com>
Date: Tue, 20 Aug 2019 16:04:39 -0400
Subject: [PATCH] Highlight only the current search match

---
 kilo.c | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/kilo.c b/kilo.c
index cd23af4..ba59e67 100644
--- a/kilo.c
+++ b/kilo.c
@@ -40,7 +40,8 @@ enum editorKey {
 
 enum editorHighlight {
 	HL_NORMAL = 0,
-	HL_NUMBER
+	HL_NUMBER,
+	HL_MATCH
 };
 
 /*** data ***/
@@ -280,6 +281,9 @@ int editorSyntaxToColor(int hl)
 		case HL_NUMBER:
 			return 31;
 
+		case HL_MATCH:
+			return 34;
+
 		default:
 			return 37;
 	}
@@ -599,6 +603,16 @@ void editorFindCallback(char *query, int key)
 	static int last_match = -1;
 	static int direction = 1;
 
+	static int saved_hl_line;
+	static char *saved_hl = NULL;
+
+	if (saved_hl)
+	{
+		memcpy(E.row[saved_hl_line].hl, saved_hl, E.row[saved_hl_line].rsize);
+		free(saved_hl);
+		saved_hl = NULL;
+	}
+
 	if (key == '\r' || key == '\x1b')
 	{
 		last_match = -1;
@@ -645,6 +659,11 @@ void editorFindCallback(char *query, int key)
 			E.cy = current;
 			E.cx = editorRowRxToCx(row, match - row->render);
 			E.rowoff = E.numrows;
+
+			saved_hl_line = current;
+			saved_hl = malloc(row->rsize);
+			memcpy(saved_hl, row->hl, row->rsize);
+			memset(&row->hl[match - row->render], HL_MATCH, strlen(query));
 			break;
 		}
 	}