feat: allow specifying separate style interpolators in navigationOptions

[tchayen]

As @satya164 suggested in #154, instead of passing navigationOptions to interpolators, they can be allowed to specify their own interpolators.

Custom interpolator, if defined, takes precedence over the one from NavigationConfig. The rest of the logic stays the same.

[satya164]

Thanks for the PR!

Instead of adding this in navigationOptions, I'd move this prop entirely to NavigationStackOptions and remove it from NavigationConfig.

This means we also need to move the direction and transitionSpec options so it's possible to use a TransitionPreset in navigationOptions.

Edit: We should probably also rename direction option to transitionDirection to avoid ambiguity.

Edit: Or direction is fine. It's not just for transition, but both gesture and transition.

[tchayen]

@satya164 I tried removing TransitionPreset from NavigationConfig, but I am stuck on one thing: Stack.tsx calls renderHeader and passes the 'global' headerStyleInterpolator to it. How would you replace it?

[tchayen]

@satya164 I implemented removal of TransitionPreset from NavigationConfig . It involves changing all the related props in the chain of StackView, Stack and StackItem components.

Default transitionPreset is computed in StackView and then, in Stack, any defined screen specific options override the default ones.

Unfortunately the problem with missing headerStyleInterpolator remains 😢.

[satya164]

@tchayen I'll take care of it tomorrow.

[satya164]

Thank you for updating the PR :D

[satya164]

@tchayen I have pushed the commit here: bdfaaf9

Please test if it works when you have time and update your PR with the commit.

[tchayen]

@satya164 it works. Pushing the commit.