fix: Multiline field not correctly size in parent block when copy/paste or load.

[yamadayutaka]

The basics

• I branched from develop
• My pull request is against develop
• My code follows the style guide
• I ran npm run format and npm run lint

The details

Resolves

• Multiline field not correctly size in parent block when copy/paste #6165
• MultilineInput - Not sized properly when workspace is loaded. #6071

Proposed Changes

When loading a block with input blocks or next blocks, render the blocks last.

Behavior Before Change

Multiline field not correctly size in parent block when copy/paste or load.

Behavior After Change

Multiline field correctly size in parent block when copy/paste or load.

Reason for Changes

These issues are from v7.
So I modified the processing order to be similar for v6.

https://github.com/google/blockly/blob/6.20210701.0/core/xml.js#L564-L569

[rachel-fenichel]

@BeksOmega can you take a look at the serialization changes?

[rachel-fenichel]

Hi @yamadayutaka--sorry for the delay, but the person who knows the serialization code best is currently out of office. We haven't forgotten about your change.

[BeksOmega]

Hi @yamadayutaka ! Thank you so much for looking into this :D Sorry it took me so long to get back to you!

I was wondering, instead of refactoring the serialization order, could we try using getFastTextWidth in updateSize_ for the FieldMultilineInput? This is what the FieldTextInput uses (via Field), which is why it doesn't run into the same problem.

I haven't looked at the serialization-based solution in depth, but I would like to try fixing the field itself first if possible.

[yamadayutaka]

Hi @BeksOmega,
Thank you for reviewing my PR.
I will try it.

[yamadayutaka]

I've confirmed that what you suggested works as expected, so I created another PR.
#6461

[BeksOmega]

Closing in favor of #6461