add light-html theme

[harrylojames]

What do you think of this? Probably showing my ignorance in the world of css, but adding a new theme achieves what I was after. The upstream issue of being able to set styles on the figure would of course allow you to achieve the same but where users want to export an image and expect it to look as it did in a jupyter notebook perhaps this is more friendly?

from pyobsplot import Obsplot, Plot
import polars as pl

op = Obsplot(theme="light-html")
penguins = pl.read_csv("https://github.com/juba/pyobsplot/raw/main/doc/data/penguins.csv")

op({
    "color": {"legend": True},
    "marginLeft": 80,
    "marginRight": 80,
    "x": {"inset": 20},
    "grid": True,
    "marks": [
        Plot.boxX(penguins, {
            "x": "body_mass_g", "fill": "island", "y": "island", "fy": "species"
        })
    ],
    "title": "Test title",
    "subtitle": "Test subtitle",
    "caption": "Test caption"
}, path= "out.html")

Before -

After -

[juba]

Thanks for the PR, but I'd prefer to wait for upstream to implement figure styling instead of creating a workaround which will be obsolete after... Moreover, the default behavior makes title and subtitle style the same as the rest of your HTML document, so it is kind of coherent. You can always add a custom CSS rule to your HTML to style it differently.

Hope it makes sense, don't hesitate if you have any remark or question.

[harrylojames]

Hi, yep that sounds sensible! I'll look at adding a custom css rule / getting the upstream issue fixed. Thanks for the feedback.