Vendor import of less v429vendor/less/v429

1 files changed, 32 insertions, 20 deletions

diff --git a/forwback.c b/forwback.c
index 7b5bb2d26039..c5bd2568fd06 100644
--- a/forwback.c
+++ b/forwback.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 1984-2007  Mark Nudelman
+ * Copyright (C) 1984-2008  Mark Nudelman
  *
  * You may distribute under the terms of either the GNU General Public
  * License or the Less License, as specified in the README file.
@@ -17,7 +17,6 @@
 #include "less.h"
 #include "position.h"
 
-public int hit_eof;	/* Keeps track of how many times we hit end of file */
 public int screen_trashed;
 public int squished;
 public int no_back_scroll = 0;
@@ -51,25 +50,47 @@ eof_bell()
 }
 
 /*
- * Check to see if the end of file is currently "displayed".
+ * Check to see if the end of file is currently displayed.
  */
-	static void
-eof_check()
+	public int
+eof_displayed()
 {
 	POSITION pos;
 
 	if (ignore_eoi)
-		return;
-	if (ABORT_SIGS())
-		return;
+		return (0);
+
+	if (ch_length() == NULL_POSITION)
+		/*
+		 * If the file length is not known,
+		 * we can't possibly be displaying EOF.
+		 */
+		return (0);
+
 	/*
 	 * If the bottom line is empty, we are at EOF.
 	 * If the bottom line ends at the file length,
 	 * we must be just at EOF.
 	 */
 	pos = position(BOTTOM_PLUS_ONE);
-	if (pos == NULL_POSITION || pos == ch_length())
-		hit_eof++;
+	return (pos == NULL_POSITION || pos == ch_length());
+}
+
+/*
+ * Check to see if the entire file is currently displayed.
+ */
+	public int
+entire_file_displayed()
+{
+	POSITION pos;
+
+	/* Make sure last line of file is displayed. */
+	if (!eof_displayed())
+		return (0);
+
+	/* Make sure first line of file is displayed. */
+	pos = position(0);
+	return (pos == NULL_POSITION || pos == 0);
 }
 
 /*
@@ -251,12 +272,6 @@ forw(n, pos, force, only_last, nblank)
 		forw_prompt = 1;
 	}
 
-	if (ignore_eoi)
-		hit_eof = 0;
-	else if (eof && !ABORT_SIGS())
-		hit_eof++;
-	else
-		eof_check();
 	if (nlines == 0)
 		eof_bell();
 	else if (do_repaint)
@@ -280,7 +295,6 @@ back(n, pos, force, only_last)
 
 	squish_check();
 	do_repaint = (n > get_back_scroll() || (only_last && n > sc_height-1));
-	hit_eof = 0;
 	while (--n >= 0)
 	{
 		/*
@@ -309,7 +323,6 @@ back(n, pos, force, only_last)
 		}
 	}
 
-	eof_check();
 	if (nlines == 0)
 		eof_bell();
 	else if (do_repaint)
@@ -331,7 +344,7 @@ forward(n, force, only_last)
 {
 	POSITION pos;
 
-	if (get_quit_at_eof() && hit_eof && !(ch_getflags() & CH_HELPFILE))
+	if (get_quit_at_eof() && eof_displayed() && !(ch_getflags() & CH_HELPFILE))
 	{
 		/*
 		 * If the -e flag is set and we're trying to go
@@ -365,7 +378,6 @@ forward(n, force, only_last)
 		} else
 		{
 			eof_bell();
-			hit_eof++;
 			return;
 		}
 	}