[news.eclipse.platform] Re: Hiding certain portions of text

[Daniel Megert <daniel_megert@xxxxxxxxxx>]

Donny Kurniawan wrote:

> Hello,
>
> I want to create an editor that can hide certain portions of text.
> For example: I want to hide all comments in a C program.
>
> printf("1");
> // Hide Me A
> printf("2");
> // Hide Me B
> printf("3");
>
> I just want to hide the comments in the file without actually removing 
> the comments in the underlying file.
>
> I know it's possible since Eclipse Text Folding / Projection is able 
> to hide/show portions of the document.

Yes, this is possible. Take a look at ProjectionViewer and its 
supporting classes like ProjectionSupport, ProjectionAnnotation etc. As 
a code example you can either use the Java or the Ant Editor.

Dani

> Browsing the APIs, I found about ITextViewer.setVisibleRegion(int 
> start, int length). Is there a similar method that accepts an array of 
> text regions?

> If it's not supported by the Eclipse Text infrastructure, what is the 
> best way to implement this?
>
> Thanks,
> Best regards.