* library/text.tcl (::tk::TextUpDownLine): revert 2004-11-23 as itcore_8_4_9

	prevented scrolling to bottom.

1 files changed, 8 insertions, 35 deletions

diff --git a/library/text.tcl b/library/text.tcl
index 6a311e7..cf40c38 100644
--- a/library/text.tcl
+++ b/library/text.tcl
@@ -3,7 +3,7 @@
 # This file defines the default bindings for Tk text widgets and provides
 # procedures that help in implementing the bindings.
 #
-# RCS: @(#) $Id: text.tcl,v 1.24.2.4 2004/11/23 17:50:02 vincentdarley Exp $
+# RCS: @(#) $Id: text.tcl,v 1.24.2.5 2004/12/06 19:42:11 hobbs Exp $
 #
 # Copyright (c) 1992-1994 The Regents of the University of California.
 # Copyright (c) 1994-1997 Sun Microsystems, Inc.
@@ -842,19 +842,12 @@ proc ::tk::TextInsert {w s} {
 }
 
 # ::tk::TextUpDownLine --
-# Returns the index of the character one display line above or below the
+# Returns the index of the character one line above or below the
 # insertion cursor.  There are two tricky things here.  First,
 # we want to maintain the original column across repeated operations,
 # even though some lines that will get passed through don't have
 # enough characters to cover the original column.  Second, don't
 # try to scroll past the beginning or end of the text.
-# 
-# This procedue has side effects, in that it will adjust the widget's
-# current display to show the insert position.  This is required to
-# allow correct moving by display lines (when wrapped).  All callers
-# of this proc always adjust the display anyway, so the side-effects
-# here are not actually observed by the user of the text widget
-# bindings.
 #
 # Arguments:
 # w -		The text window in which the cursor is to move.
@@ -863,36 +856,16 @@ proc ::tk::TextInsert {w s} {
 
 proc ::tk::TextUpDownLine {w n} {
     variable ::tk::Priv
-    
-    $w see insert
-    scan [$w bbox insert] {%d %d %*d %d} xpos ypos height
-    set weight [$w cget -height]
-    
+
     set i [$w index insert]
+    scan $i "%d.%d" line char
     if {$Priv(prevPos) ne $i} {
-	set Priv(pos) $xpos
-    }
-    
-    if {(($n < 0) && ($ypos <= $height)) \
-      || (($n > 0) && (($ypos+$height) >= ($weight*$height)))} {
-	$w yview scroll $n units
-	scan [$w bbox insert] {%*d %d %*d %d} ypos height
-	set weight [$w cget -height]
-    }
-    
-    if {(($n < 0) && ($ypos > $height)) \
-      || (($n > 0) && (($ypos+$height) < ($weight*$height))) } {
-	set new [$w index "@$Priv(pos),[expr {$ypos + $n * $height}]"]
-	scan [$w bbox $new] {%d %d %d %*d} newx newy newwidth
-	if {$newy eq $ypos} {
-	   set new $i
-	} elseif {$Priv(pos) > [expr {$newx+$newwidth/2}]} {
-	   set new [$w index "@[expr {$newx + $newwidth + 1}],$newy"]
-	}
-    } else {
+	set Priv(char) $char
+    }
+    set new [$w index [expr {$line + $n}].$Priv(char)]
+    if {[$w compare $new == end] || [$w compare $new == "insert linestart"]} {
 	set new $i
     }
-    
     set Priv(prevPos) $new
     return $new
 }