Re: Expression maps and "normal"

On 10/20/2011 3:50 AM, Andy Wokula wrote:
> Am 19.10.2011 04:21, schrieb David Fishburn:
>> On 1/29/2009 7:34 AM, Andy Wokula wrote:
>>> ....
>>>
>>> omap w w<SID>copyreg
>>>
>>> " if the following is repeated with "." (e.g. "df_.") the expression
>>> " will not be evaluated again:
>>> ono<expr><script> f "f".<sid>Getchar(). "<SID>copyreg"
>>> ono<expr><script> F "F".<sid>Getchar(). "<SID>copyreg"
>>>
>>> " (should work as well:)
>>> " omap<expr> f "f".<sid>Getchar(). "<SID>copyreg"
>>>
>>> map . .<SID>copyreg
>>>
>>> nnoremap<silent> <SID>copyreg :call<sid>Record()<cr>
>>> inoremap<silent> <SID>copyreg<C-R>=<sid>Record()<cr>
>>>
>>>
>> Andy,
>>
>> You recommended the following code (which I have been using) some
>> time ago.
>>
>> I find i am in a situation where I need to pass parameters to
>> <sid>Record().
>>
>> So expression mapping code does the following:
>>
>> nnoremap <silent> <SID>yrrecord :call YRRecord3()<cr>
>> inoremap <silent> <SID>yrrecord <C-R>=YRRecord3()<cr>
>>
>> function! YRMapsExpression(sid, motion, ...)
>>
>> Here is an existing map:
>> o y YRMapsExpression("<SNR>107_", "y")
>>
>> The end of the YRMapsExpreesion function appends the call to the
>> let cmds .= a:sid. "yrrecord"
>>
>> What I would like to do is the following, though I am not certain of
>> the syntax given this setup.
>>
>> Basically, I want the following:
>> nnoremap <silent> <SID>yrrecord :call YRRecord3( myMotionParameter )<cr>
>> inoremap <silent> <SID>yrrecord <C-R>=YRRecord3( myMotionParameter )<cr>
>>
>> function! YRMapsExpression(sid, motion, ...)
>>
>> Here is an existing map with the motion at the end:
>> o y YRMapsExpression("<SNR>107_", "y")
>>
>> The end of the YRMapsExpreesion function appends the call to the
>> let cmds .= a:sid. "yrrecord" "y"
>>
>> So, in the end call YRRecord3("y")
>>
>> Is this possible using the setup above with the expressions?
>>
>> Thanks,
>> Dave
>
> Hi Dave!
>
> You want mappings with parametrized left-hand-side (?) -- there is no
> such thing in Vim.
>
> Could you say more about the purpose of the additional parameter?
>

So basically we have a omap (expression map) on y which call
YRMapsExpression:
o y YRMapsExpression("<SNR>107_", "y")

When I hit yy, YRMapsExpression is called, and it tacks on the call to:
nnoremap <silent> <SID>yrrecord :call YRRecord3( myMotionParameter )<cr>
let cmds .= a:sid. "yrrecord"
return cmds

So, when this executes, it also executes the call to YRRecord3().

Other expression maps are created as well:
ye
yw
yb
...

Basically, in YRRecord3(), I want to know that "ye" was called. Right
now, I have no idea what mapping triggered the call to this function.

I could simply create a script variable and in YRMapsExpression do this:
let s:yr_last_motion = 'ye'

Then in YRRecord3(), I have a reference to it.

What I was worried about in this approach is the nesting of cmds and
mappings, and the issue of what happens when I run macros.

I wasn't sure I would have a proper stack of calls when only using a
script variable.

What do you think?

Thanks,
Dave

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