text widget fixes

1 files changed, 9 insertions, 1 deletions

diff --git a/generic/tkTextIndex.c b/generic/tkTextIndex.c
index 41702f1..44deddd 100644
--- a/generic/tkTextIndex.c
+++ b/generic/tkTextIndex.c
@@ -10,7 +10,7 @@
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tkTextIndex.c,v 1.17 2004/02/28 16:04:43 vincentdarley Exp $
+ * RCS: @(#) $Id: tkTextIndex.c,v 1.18 2004/06/04 10:51:18 vincentdarley Exp $
  */
 
 #include "default.h"
@@ -286,6 +286,10 @@ TkTextNewIndexObj(textPtr, indexPtr)
  *
  *	Given a pixel index and a byte index, look things up in the B-tree
  *	and fill in a TkTextIndex structure.
+ *	
+ *	The valid input range for pixelIndex is from 0 to the number
+ *	of pixels in the widget-1.  Anything outside that range will
+ *	be rounded to the closest acceptable value. 
  *
  * Results:
  * 
@@ -321,6 +325,10 @@ TkTextMakePixelIndex(textPtr, pixelIndex, indexPtr)
     }
     indexPtr->linePtr = TkBTreeFindPixelLine(textPtr->tree, pixelIndex, 
 					     &pixelOffset);
+    /* 
+     * 'pixedlIndex' was too large, so we try again, just to find
+     * the last pixel in the window
+     */
     if (indexPtr->linePtr == NULL) {
 	indexPtr->linePtr = TkBTreeFindPixelLine(textPtr->tree, 
 			      TkBTreeNumPixels(textPtr->tree)-1, &pixelOffset);