Problem with compose and weight / verticalScroll modifiers

[hardysim]

I'm using the current snapshot version via classpath 'app.cash.paparazzi:paparazzi-gradle-plugin:1.0.0-SNAPSHOT' to get compose support wich works already great but when I snapshot a composable which have special modifiers in it, I run into problems.

Modifier.weight()

When weight is used on a composable, this single one is ignored and does not show up on the snapshot. Others around it are still fine.

I'm using this modifier for the texts on a dialog so that the message gets more space than the title. When taking a paparazzi snapshot, the contents whole text is gone because it's inside a Column using the weight-modifier:

Modifier.verticalScroll()

When using verticalScroll the whole snapshotis black / empty.

I'm using this modifier for the message on a dialog it can be scrolled when too long. When taking a paparazzi snapshot, the whole snapshot is broken:

[jrodbx]

Can you provide a sample project/repro?

[hardysim]

Sure. And as always, during creation of the example, I was able to narrow down the source of my problem 😊. Please have a look at the example at https://github.com/hardysim/paparazzi-weight-example:

I'm trying to use a DeviceConfig where screenHeight and screenWidth is set to 1. The idea was that the snapshot-image is only as big as it needs to be (just like the preview in Android Studio). The renderingMode is set to FULL_EXPAND, so the image will expand as needed.

https://github.com/hardysim/paparazzi-weight-example/blob/master/mylibrary/src/test/java/com/example/mylibrary/ComposeTest.kt#L17

This works fine until I test a composable which uses a weight()- or verticalScroll()-modifier. When leaving the DeviceConfig untouched, the snapshot-images are rendered correctly (but bigger than they need to be).

So it seems like this is no bug but I want to ask: How can I get an "only as big as necessary" snapshot-image instead of one as big as the entire screen. Is this possible?

[jrodbx]

How can I get an "only as big as necessary" snapshot-image instead of one as big as the entire screen. Is this possible?

It is now as of #497 and #655.

Like so:

    @get:Rule
    val paparazzi = Paparazzi(
        maxPercentDifference = 0.1,
        deviceConfig = DeviceConfig.NEXUS_5,
        renderingMode = SessionParams.RenderingMode.SHRINK,
        showSystemUi = false
     )

[jrodbx]

After cloning the sample and updating:

compose =>1.3.1 kotlin => 1.7.10 paparazzi => 1.2.0-SNAPSHOT compileSdk = 33 AGP to 7.3.1

I get the following snapshot:

Here's its @Preview image: