bitwarden-mobile/src/Xamarin.AndroidX.Credentials/Additions/AboutAdditions.txt

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Additions allow you to add arbitrary C# to the generated classes
before they are compiled. This can be helpful for providing convenience
methods or adding pure C# classes.
== Adding Methods to Generated Classes ==
Let's say the library being bound has a Rectangle class with a constructor
that takes an x and y position, and a width and length size. It will look like
this:
public partial class Rectangle
{
public Rectangle (int x, int y, int width, int height)
{
// JNI bindings
}
}
Imagine we want to add a constructor to this class that takes a Point and
Size structure instead of 4 ints. We can add a new file called Rectangle.cs
with a partial class containing our new method:
public partial class Rectangle
{
public Rectangle (Point location, Size size) :
this (location.X, location.Y, size.Width, size.Height)
{
}
}
At compile time, the additions class will be added to the generated class
and the final assembly will a Rectangle class with both constructors.
== Adding C# Classes ==
Another thing that can be done is adding fully C# managed classes to the
generated library. In the above example, let's assume that there isn't a
Point class available in Java or our library. The one we create doesn't need
to interact with Java, so we'll create it like a normal class in C#.
By adding a Point.cs file with this class, it will end up in the binding library:
public class Point
{
public int X { get; set; }
public int Y { get; set; }
}