Add function to resize the browser source from JavaScript

[exeldro]

Description

Add function to resize the browser source from javascript

Motivation and Context

Allows browser sources to be sized to exactly fit its contents.
This can be very useful for my Markdown Source plugin.

How Has This Been Tested?

On windows 11 64 bit using Markdown Source with the following javascript:

	let size = document.body.getBoundingClientRect();
	window.obsstudio.setBrowserSize(Math.ceil(size.width), Math.ceil(size.height));

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist:

• My code has been run through clang-format.
• I have read the contributing document.
• My code is not on the master branch.
• The code has been tested.
• All commit messages are properly formatted and commits squashed where appropriate.
• I have included updates to all appropriate documentation.

[Lain-B]

Would love to have more feedback from others, but otherwise I don't mind one way or another. Maybe @Warchamp7 has an opinion on this one?

But here's one super tiny nitpick.

[Lain-B]

bs->source probably should be s just to be safe.

[exeldro]

I am not sure what you mean as bs->source is a obs_source_t* and s is a obs_data_t*.

[gxalpha]

I think this isn't really how obs_source_update is meant to be used.
Sure, you can do it like this, but really you're meant to pass a new obs_data_t object containing the new settings (in place of the nullptr), instead of modifying the object obtained by obs_source_get_settings directly.

And while you're at it, you should probably use the C++-RAII-types (OBSData / OBSDataAutoRelease) in C++-code.

[Warchamp7]

What's the use case for adding a new obs-browser js binding over say using obs-websockets? Is it just the hurdle of connecting to obs-ws?

Ever since obs-ws was made a core plugin I'm generally against adding new obs-browser bindings to avoid maintaining essentially two browser source APIs.

At the very least, I think a better approach here would be a more abstract system that allows browser sources to dispatch() an event to OBS plugins. Then your plugin could handle the source resizing in response to that event.