stop clearing screen on history traversal

1 files changed, 27 insertions, 4 deletions

diff --git a/shed_history.c b/shed_history.c
index 076554c..00ce0e1 100644
--- a/shed_history.c
+++ b/shed_history.c
@@ -1,18 +1,41 @@
 #include <stddef.h>
+#include <string.h>
+#include <unistd.h>
 #include "shed.h"
 
+static int shed_refresh(struct shed *e, struct buffer *next)
+{
+	shed_move_end(e);
+	size_t s = e->cur->pos;
+	char clrbuf[s];
+
+	memset(clrbuf, '\b', s);
+	write(STDOUT_FILENO, clrbuf, s);
+
+	memset(clrbuf, ' ', s);
+	write(STDOUT_FILENO, clrbuf, s);
+
+	memset(clrbuf, '\b', s);
+	write(STDOUT_FILENO, clrbuf, s);
+
+	e->cur = next;
+	e->cur->pos = 0;
+	shed_move_end(e);
+	return 1;
+}
+
 int shed_history_forward(struct shed *e)
 {
 	if (e->cur->next != NULL) {
-		e->cur = e->cur->next;
+		return shed_refresh(e, e->cur->next);
 	}
-	return shed_redraw(e);
+	return 1;
 }
 
 int shed_history_backward(struct shed *e)
 {
 	if (e->cur->prev != NULL) {
-		e->cur = e->cur->prev;
+		return shed_refresh(e, e->cur->prev);
 	}
-	return shed_redraw(e);
+	return 1;
 }