Relative line numbers

[kentrh]

An effort to solve #28.

It is not a perfect solution, but it works better than not having any relative numbers in my opinion.

• It is enabled by set relativenumber in .xvimrc
• It would have been better to extract the line number from the existing line number layer, but I couldn't find a way to do this, so instead I calculate the line numbers based on the existing layers' Y coordinate and padding between the layers. This may cause the relative numbers sometimes to be off, but it works most of the time.
• It picks font, font size and text color from the Xcode theme settings
• It removes the original line number layers and adds a new CATextLayer for each line
• The relative line number handling is called every time XVimWindow.resetEvaluatorStack is called, but there may be a better placement than this, but I'm not sure where that would be. Would've been nice if someone with a bit more experience with this project could have a look at this or point me in the right direction.

[pebble8888]

@kentrh Thank you for your PR. It has been merged to develop branch.

[rudedogg]

It would have been better to extract the line number from the existing line number layer, but I couldn't find a way to do this, so instead I calculate the line numbers based on the existing layers' Y coordinate and padding between the layers. This may cause the relative numbers sometimes to be off, but it works most of the time.

I wonder if it would be possible to cast lineNumbersHostingLayer from CALayer -> CATextLayer and get the line number through the .string property?

Apologies for not trying it myself. Hoping this could help with #344.

[kentrh]

It would have been better to extract the line number from the existing line number layer, but I couldn't find a way to do this, so instead I calculate the line numbers based on the existing layers' Y coordinate and padding between the layers. This may cause the relative numbers sometimes to be off, but it works most of the time.

I wonder if it would be possible to cast lineNumbersHostingLayer from CALayer -> CATextLayer and get the line number through the .string property?

Apologies for not trying it myself. Hoping this could help with #344.

Hi, yeah, I tried that, but it didn't work. The funniest thing, though, was that I got that to work one time while I was debugging and stepping through, but I only got it working once, and I could not reproduce it, so I gave up after a while.