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From "Emmanuel Bourg (JIRA)" <j...@apache.org>
Subject [jira] Updated: (CLI-151) HelpFormatter wraps incorrectly on every line beyond the first
Date Thu, 29 May 2008 13:04:45 GMT

     [ https://issues.apache.org/jira/browse/CLI-151?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Emmanuel Bourg updated CLI-151:
-------------------------------

    Component/s:     (was: CLI-1.x)
                 Help formatter

> HelpFormatter wraps incorrectly on every line beyond the first
> --------------------------------------------------------------
>
>                 Key: CLI-151
>                 URL: https://issues.apache.org/jira/browse/CLI-151
>             Project: Commons CLI
>          Issue Type: Bug
>          Components: Help formatter
>            Reporter: Dan Armbrust
>             Fix For: 1.2
>
>         Attachments: fix-wrapping.patch
>
>
> The method findWrapPos(...) in the HelpFormatter is a couple of bugs in the way that
it deals with the "startPos" variable.  This causes it to format every line beyond the first
line by "startPos" to many characters, beyond the specified width.  
> To see this, create an option with a long description, and then use the help formatter
to print it.  The first line will be the correct length.  The 2nd, 3rd, etc lines will all
be too long.
> I don't have a patch (sorry) - but here is a corrected version of the method.
> I fixed it in two places - both were using "width + startPos" when they should have been
using width.
> {code}
>  protected int findWrapPos(String text, int width, int startPos)
>     {
>         int pos = -1;
>         // the line ends before the max wrap pos or a new line char found
>         if (((pos = text.indexOf('\n', startPos)) != -1 && pos <= width)
>             || ((pos = text.indexOf('\t', startPos)) != -1 && pos <= width))
>         {
>             return pos+1;
>         }
>         else if ((width) >= text.length())
>         {
>             return -1;
>         }
>         // look for the last whitespace character before startPos+width
>         pos = width;
>         char c;
>         while ((pos >= startPos) && ((c = text.charAt(pos)) != ' ')
>                && (c != '\n') && (c != '\r'))
>         {
>             --pos;
>         }
>         // if we found it - just return
>         if (pos > startPos)
>         {
>             return pos;
>         }
>         
>         // must look for the first whitespace chearacter after startPos 
>         // + width
>         pos = startPos + width;
>         while ((pos <= text.length()) && ((c = text.charAt(pos)) != ' ')
>                && (c != '\n') && (c != '\r'))
>         {
>             ++pos;
>         }
>         return (pos == text.length())        ? (-1) : pos;
>     }
> {code}

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