outline sidebar and current position in sync

[aleprovencio]

What I mean is a visual indication on the outline sidebar of where you're currently browsing the document. I find this very useful information and its a common behavior among other pdf viewers.

[reyou]

This is what I was looking for, it would be great following features to have:

1. Track following section on the side bar (where if I change the page, and go into new chapter, section, side bar will focus to that section with bold text)
2. Search in the side bar
3. Enable/Disable auto sidebar tracking. So if enabled it will auto focus on the sidebar, if disabled only if we hit "highlight on the sidebar" button will focus on current section on the sidebar.
4. API support for these :)

[TianTXie]

Yep, I need this feature too.

[devnoname120]

@timvandermeij Is this on the roadmap? I think that this feature would be a very nice thing to have.

[timvandermeij]

No, but anyone is welcome to work on this and submit pull requests for us to review.

[Snuffleupagus]

No, but anyone is welcome to work on this and submit pull requests for us to review.

However, please keep in mind that implementing this in a way that won't perform badly (e.g. in larger documents) could be slightly challenging in general.
Hence I'm thinking that a simpler implementation, similar to what current versions of Adobe Reader does, is probably the way to go here (most of what #7557 (comment) ask for is unlikely to be desirable).