add a function for get_component

[sebastian-goeldi]

Adds a very similar to gdsfactory's get_component function to KCLayout. This will look in the factories or return accordingly either a KCell (in case of int or whatever the functions wants).

Also allows direct casting to other classes based on ProtoTKCell[Any].

@joamatab does gdsfactory's get_component have a different function for the all angle functions or how is that handled?

\cc @flaport

Summary by Sourcery

Add a get_component function to KCLayout to retrieve components using various specifications and support direct casting to other classes. Include tests to validate the function's behavior and error handling.

New Features:

• Introduce a get_component function in KCLayout that retrieves components based on various specifications, including integers, strings, callable functions, and dictionaries.

Enhancements:

• Enable direct casting to other classes based on ProtoTKCell[Any] within the get_component function.

Tests:

• Add tests for the new get_component function to verify its behavior with different input types and ensure it raises errors appropriately.

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request introduces a new get_component function to the KCLayout class, similar to gdsfactory's function, allowing for flexible component retrieval and casting to other classes. It also includes tests for various use cases and error handling.

Updated class diagram for KCLayout with get_component function

classDiagram
    class KCLayout {
        +get_component(spec: KCellSpec, output_type: type[K], cell_kwargs: Any) K
        +get_component(spec: int) KCell
        +get_component(spec: str, cell_kwargs: Any) ProtoTKCell[Any]
        +get_component(spec: Callable[..., K], cell_kwargs: Any) K
        +get_component(spec: K) K
    }
    class KCellSpecDict {
        +component: str
        +settings: dict[str, Any]
    }
    class ProtoTKCell {
        <<interface>>
    }
    KCLayout --> ProtoTKCell
    KCLayout --> KCellSpecDict
    KCellSpec : int | str | KCellSpecDict | ProtoTKCell[Any] | Callable[..., ProtoTKCell[Any]]
    KCLayout : KCellSpec

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Updated class diagram for KCellSpec and related types

classDiagram
    class KCellSpec {
        <<TypeAlias>>
        int | str | KCellSpecDict | ProtoTKCell[Any] | Callable[..., ProtoTKCell[Any]]
    }
    class KCellSpecDict {
        +component: str
        +settings: NotRequired[dict[str, Any]]
    }
    class ProtoTKCell {
        <<interface>>
    }
    KCellSpec --> KCellSpecDict
    KCellSpec --> ProtoTKCell

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File-Level Changes

Change	Details	Files
Addition of the get_component function to KCLayout.	Implemented multiple overloads for get_component to handle different types of specifications. Added logic to handle callable specifications, string specifications, and integer specifications. Included error handling for invalid use of cell keyword arguments with static cells.	src/kfactory/layout.py
Introduction of KCellSpec and KCellSpecDict types.	Defined KCellSpec as a type alias for various specification types. Created KCellSpecDict as a TypedDict for component specifications with optional settings.	src/kfactory/typings.py
Addition of tests for the get_component function.	Tested normal function calls with different parameters. Tested function calls with output_type parameter. Included tests to ensure proper error handling for invalid input.	tests/test_layout.py

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.97%. Comparing base (060e948) to head (67d1b28).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #625      +/-   ##
==========================================
+ Coverage   65.89%   65.97%   +0.08%     
==========================================
  Files          64       64              
  Lines        9713     9732      +19     
  Branches     1811     1816       +5     
==========================================
+ Hits         6400     6421      +21     
  Misses       2782     2782              
+ Partials      531      529       -2     

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