Strange "mouse" behavior in mintty

Ryan Johnson
Wed Aug 29 20:12:00 GMT 2012

On 29/08/2012 3:15 PM, Andy Koppe wrote:
> On 14 August 2012 04:43, Ryan Johnson wrote:
>> On 13/08/2012 10:04 PM, Herbert Stocker wrote:
>>> Hi Ryan,
>>> On 13.08.2012 15:33, Ryan Johnson wrote:
>>>> Hi all,
>>>> I'm hitting  a mouse-related (?) problem with mintty in non-mouse mode.
>>>> STC A: Log into a remote machine, invoke `sleep 10', and -- during the
>>>> wait --- click anywhere on the line containing the cursor.
>>>> STC B: Open tinyirc and click anywhere on the text entry line at the
>>>> bottom
>>>> Both cases will insert a long string like this:
>>>> ^[[C^[[C^[[C^[[C^[[C^[[C^[[C^[[C^[[C^[[C^[[C^[[C^[[C (only about 4x longer)
>>> Did you notice that when you click somewhere in the command line, the
>>> cursor moves
>>> to that position? i think it has to do with that.
>>> Go to the options dialog, select "Mouse" and uncheck "Clicks place command
>>> line cursor".
>>> The effect should go away.
>> Yes, that's the feature I was saying is probably related (see quote below).
>> I don't want to disable it because it's immensely useful... I just don't
>> want it dumping a mountain of ^[[C escapes at odd times.
> The feature is a hack, which is why it's off by default. Mintty simply
> sends the number of arrow left/right keypresses that it thinks should
> take the cursor to the right position, whereby ^[[C is the keycode for
> arrow right. Obviously this relies on the application handling such
> keypresses in the expected way.
Fair enough. Perhaps we could have a mintty-specific escape so users can 
selectively disable it for those apps (like tinyirc) where it's a 
problem? Hack or not, I really like the feature and don't want to 
disable it globally.

> However, are you finding that the arrow keys work where the mouse
> feature doesn't? I think there is a problem with mintty here actually,
> in that it doesn't take account of application cursor key mode when
> sending those mouse events. (In that mode, the arrow left/right
> keycodes change to ^[OD and ^[OC.)
I don't think arrow keys are recognized in either case: bash wouldn't 
process them until the command it's running completes, and tinyirc is 
not mouse-enabled AFAIK (it uses curses directly rather than the more 
sensible libreadline). But it does seem that ^[OC would be more 
appropriate to send in app mode.


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