VisualD modding

[Rainer Schuetze via Digitalmars-d-ide]

On 14.08.2017 03:49, Johnson Jones wrote:
> On Sunday, 13 August 2017 at 20:43:21 UTC, Johnson Jones wrote:
>> So, I'd like to fix some of visual D's navigation and editing logic 
>> and possibly implement something like elastic tabs: 
>> http://nickgravgaard.com/elastic-tabstops/
>>
>> 1. Backspace and delete should be tab aligned and use elastic space.
>>
>> 2. Indention on new line should not add spaces(it currently does and 
>> screws things up as things are no longer aligned and it is very 
>> difficult to realign stuff.
>>
>> 3. Indentation should use previous indentation when using tab or 
>> enter, unless empty line.
>>
>> I've went ahead and added a property called elasticSpace to visual D's 
>> properties(should be in the tab section I suppose but I didn't wanna 
>> have to figure that mess out).
>>
>>
>>
>> propertypage: https://justpaste.it/1a1if
>>
>> dpackage: https://justpaste.it/1a1ig
>>
>> This do add it to the first entry and defaults it to true but that can 
>> easily be fixed.
>>
>> The real work is to consume all spaces, working backwards, when 
>> hitting backspace and to consume all spaces forward when hitting 
>> delete. Also dealing with other the tab and enter key appropriately.
>>
>> TabSanity uses the code like
>>
>> https://justpaste.it/1a1ij
>>
>> Anyways, I'm at the following location in viewfilter.d and a little 
>> lost(well, time constraints).
>>
>>
>> The backspace key is handled as so:
>>
>>             // Handle backspace
>>             case ECMD_BACKSPACE:
>>                 if(mCodeWinMgr.mSource.IsCompletorActive())
>>                     initCompletion(false);
>>                 if (Package.GetGlobalOptions().elasticSpace)
>>                 {
>>                     mView.GetCaretPos(&line, &idx);
>>
>>                     dchar ch = pvaIn.uiVal;
>>                 }
>>                 goto case;
>>
>> in which I've added the new code.
>>
>> but it's a little difficult to navigate through the code. I think with 
>> the proper mapping maybe it is possible almost directly copy and paste 
>> the tabsanity code.
>>
>> In any case, I figured I'd let you have a shot at it first if you want 
>> since your probably more familiar with it than me(and since debugging 
>> is extremely slow with this sorta thing I'll probably burn a lot more 
>> time than you would).
>>
>> Thanks
> 
> So, I'm trying to implement some of this stuff but I can't seem to find 
> a way to get the modified line before it was modified.
> 
> I'm using something like this
> 
> BSTR str;
>                      mCodeWinMgr.mSource.mBuffer.GetLengthOfLine(line, 
> &len);
> mCodeWinMgr.mSource.mBuffer.GetLineText(line, 0, line, len, &str);
> 
> while tabsanity is using something like
> 
> auto snapshot = TextView.TextBuffer.CurrentSnapshot;
> 
> which I can't seem to find an equivalent of in visual D.
> 
> 
> Any ideas?

You can capture the state of the line before default execution with

mNextTarget.Exec()

Maybe your code could just be moved up there to begin with.