(line_number_display_limit_width): New var.

(decode_mode_spec): Use it instead of hardcoded value.
(syms_of_xdisp): Defvar it.

diff --git a/src/xdisp.c b/src/xdisp.c
index 9fcead69e7e896a1b7831793de38a4231f86b154..f418bd2321cd6e4a1362fd1c2ba6ac11bbc7f50d 100644 (file)
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -488,6 +488,10 @@ int line_number_displayed;
 
 static int line_number_display_limit;
 
+/* line width to consider when repostioning for line number display */
+
+static int line_number_display_limit_width;
+
 /* Number of lines to keep in the message log buffer.  t means
    infinite.  nil means don't log at all.  */
 
@@ -11346,7 +11350,7 @@ decode_mode_spec (w, c, field_width, precision)
            int limit = BUF_BEGV (b);
            int limit_byte = BUF_BEGV_BYTE (b);
            int position;
-           int distance = (height * 2 + 30) * 200;
+           int distance = (height * 2 + 30) * line_number_display_limit_width;
 
            if (startpos - distance > limit)
              {
@@ -11359,7 +11363,7 @@ decode_mode_spec (w, c, field_width, precision)
                                          - (height * 2 + 30),
                                          &position);
            /* If we couldn't find the lines we wanted within 
-              200 chars per line,
+              line_number_display_limit_width chars per line,
               give up on line numbers for this window.  */
            if (position == limit_byte && limit == startpos - distance)
              {
@@ -12042,6 +12046,12 @@ If the buffer is bigger than this, the line number does not appear\n\
 in the mode line.");
   line_number_display_limit = 1000000;
 
+  DEFVAR_INT ("line-number-display-limit-width", &line_number_display_limit_width,
+    "*Maximum line width (in characters) for line number display.\n\
+If the average length of the lines near point is bigger than this, then the\n\
+line number may be omitted from the mode line.");
+  line_number_display_limit_width = 200;
+
   DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows,
     "*Non-nil means highlight region even in nonselected windows.");
   highlight_nonselected_windows = 0;