Make use of SVG graphics

[FlorianKroiss]

Eclipse added support for SVG images in 2025-06, see https://eclipse.dev/eclipse/markdown/?f=news/4.36/platform.md
AFAIK, we already have the source svg files for some of our used icons in the /svg directory of this repo.
So I think there are a few improvements we can make now:

1. Use the svg files instead of the pre-rendered png where possible
2. Use svg variants of images that we consume from other plugins, i.e., platform:/....
3. Search/obtain svg files for the remaining png files without a source svg. Maybe from https://github.com/eclipse-platform/eclipse.platform.images

I will try to make these changes in a few PRs. (1) and (2) should be straight forward. (3) is probably a bit more difficult.

After we switched to svg, we probably still have to keep the png images around for some time, because other downstream implementations might re-use them. We could probably remove our pngs when the Platform removes theirs, which might happen some time after 2027-06, see https://eclipse.dev/eclipse/markdown/?f=news/4.36/platform.md

[FlorianKroiss]

I went searching through https://github.com/eclipse-platform/eclipse.platform.images to resolve (3) and this is what I came up with:

Current PNG	Potential SVG from eclipse.platform.images
	Unclear source? JDT uses here, but LSP4E uses a different icon (green triangle) for fields
	Unclear source?
	Unclear source?
	Unclear source?
	Unclear source? (Also not sure what this should depict?)

I'm assuming that integrating these images is not problematic, because they are already coming from an Eclipse / EPL 2.0 project, but I still wanted to ask before I create a PR to do so.

[FlorianKroiss]

@rubenporras Do you think I can integrate the matching svg files from eclipse.platform.images?

Do you happen to know where the remaining images might have been taken from?

[travkin79]

Hi @FlorianKroiss,
Thank you for working on this.

For , I suggest to use the same icon that is used in JDT, but in this case we also have to adapt the non-strikethrough version of it, i.e.: platform:/plugin/org.eclipse.lsp4e/icons/full/obj16/field.png.

seems to come from CDT: platform:/plugin/org.eclipse.cdt.ui/icons/obj16/struct_obj.gif, but I didn't find an SVG version of it.

The icons with curly braces and square brackets might come from an older JDT plug-in. But I didn't find them in the latest versions.