Class PreProcessView

python-client/src/datapane/processors/processors.py:32–65

Optimisations to improve the layout of the view using the Block-API

class PreProcessView(BaseProcessor):
    """Optimisations to improve the layout of the view using the Block-API"""

    def __init__(self, *, is_finalised: bool = True) -> None:
        self.is_finalised = is_finalised
        super().__init__()

    def __call__(self, _: t.Any) -> None:
        # AST checks
        if len(self.s.blocks.blocks) == 0:
            raise InvalidReportError("Empty blocks object - must contain at least one block")

        # convert Page -> Select + Group
        v = copy(self.s.blocks)
        if all(isinstance(blk, b.Page) for blk in v.blocks):
            # convert to top-level Select
            p: b.Page  # noqa: F842
            v.blocks = [
                b.Select(
                    blocks=[b.Group(blocks=p.blocks, label=p.title, name=p.name) for p in v.blocks],
                    type=b.SelectType.TABS,
                )
            ]

        # Block-API visitors
        pp = PreProcess(is_finalised=self.is_finalised)
        v.accept(pp)
        v1 = pp.root
        # v1 = copy(v)

        # update the processor state
        self.s.blocks = v1

        return None


class ConvertXML(BaseProcessor):