Strongly typed styles

[Kobzol]

Style object:

class Style:
    def __init__(attrs):
          self.attrs = attrs # can be replaced by self.bold, self.color to be fully typed

   def update(self, **kwargs):
        attrs = dict(self.attrs)
        attrs.update(kwargs)
        return Style(attrs)

Creation of style:
style = Style(bold=True)

Change style:
new_style = style.update(size=32)

Default styles + update:

code = slide.style.code()
slide.style.update(code, code.update(bold=True))

Using style:

style = slide.style.default().update(bold=True)
box.text("hello", style=style)

Usage in text:

box.text("hello ~emph{world} ~mystyle{!}", style=style1,
inline_styles=dict(emph=slide.styles.emph(), mystyle=mystyle))

[spirali]

Implemented in v2.0 as TextStyles