VisualD modding

[Johnson Jones via Digitalmars-d-ide]

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?