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bug#13907: 24.3.50; cygw32 build mishandles drag-n-dropped file with non


From: Daniel Colascione
Subject: bug#13907: 24.3.50; cygw32 build mishandles drag-n-dropped file with non-ASCII characters in name
Date: Sun, 10 Mar 2013 16:00:13 -0700
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130215 Thunderbird/17.0.3

On 3/8/2013 7:03 PM, Daniel Colascione wrote:
> On 3/8/2013 7:03 PM, Daniel Colascione wrote:
>> On 3/8/2013 1:25 PM, Daniel Colascione wrote:
>>> On 3/8/2013 12:53 PM, Eli Zaretskii wrote:
>>>>> Date: Fri, 08 Mar 2013 22:33:07 +0200
>>>>> From: Eli Zaretskii <address@hidden>
>>>>> Cc: address@hidden
>>>>>
>>>>> And one more question: what is the value of file-name _before_ it is
>>>>> passed to cygwin-convert-file-name-from-windows?  Does it perhaps
>>>>> already have the U-umlaut replaced by a blank?
>>>>
>>>> I think the problem is on the C level, not on the Lisp level.  Take a
>>>> look at w32term.c:construct_drag_n_drop -- it uses ANSI version of
>>>> DragQueryFile to get the file name, then decodes it by DECODE_FILE.
>>>> But DECODE_FILE uses UTF-8 in the cygw32 build, so this is
>>>> inappropriate for decoding file names that come from Windows APIs.
>>>>
>>>> Instead, in the cygw32 build, construct_drag_n_drop should use
>>>> DragQueryFileW and convert the file name to the internal Emacs
>>>> representation using from_unicode.
>>>>
>>>
>>>
>>> Thanks for finding that! I've been swamped this week, and I haven't been 
>>> able to
>>> do any investigation. I'll see whether I can come up with a fix this 
>>> weekend.
>>>
>>
>> The patch below resolves the issue for me. Assuming it's acceptable, where
>> should I install it?

bzr trunk revision 111999 resolves this bug, the title-bar bug, and a few others
relating to mismatches between the Windows GUI encoding and the Cygwin system
encoding. Ken, it's probably this change that you want to backport to your
Cygwin package.

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