aldryn_config.py

from aldryn_client import forms


class Form(forms.BaseForm):
    style_set = forms.CharField(
        'The "styles definition set" to use in the editor',
        required=False,
    )
    content_css = forms.CharField(
        "List of CSS files to be used to apply style to editor content",
        required=False,
    )

    def clean(self):
        data = super().clean()

        if data.get("content_css"):
            files = data["content_css"].split(",")
            data["content_css"] = [item.strip() for item in files if item]
        return data

    def to_settings(self, data, settings):
        ckeditor_settings = {
            "height": 300,
            "language": "{{ language }}",
            "toolbar": "CMS",
            "skin": "moono-lisa",
        }

        if data.get("content_css"):
            ckeditor_settings["contentsCss"] = data["content_css"]
        else:
            ckeditor_settings["contentsCss"] = ["/static/css/base.css"]

        style_set = ""
        if data.get("style_set"):
            style_set = data["style_set"]

        ckeditor_settings["stylesSet"] = f"default:{style_set}"

        settings["CKEDITOR_SETTINGS"] = ckeditor_settings
        return settings