"""
Defines all schemas used in lookatme
"""
import datetime
from marshmallow import Schema, fields, validate
import pygments.styles
import yaml
[docs]class NoDatesSafeLoader(yaml.SafeLoader):
[docs] @classmethod
def remove_implicit_resolver(cls, tag_to_remove):
"""
Remove implicit resolvers for a particular tag
Takes care not to modify resolvers in super classes.
We want to load datetimes as strings, not dates, because we
go on to serialise as json which doesn't have the advanced types
of yaml, and leads to incompatibilities down the track.
"""
if not 'yaml_implicit_resolvers' in cls.__dict__:
cls.yaml_implicit_resolvers = cls.yaml_implicit_resolvers.copy()
for first_letter, mappings in cls.yaml_implicit_resolvers.items():
cls.yaml_implicit_resolvers[first_letter] = [
(tag, regexp) for tag, regexp in mappings if tag != tag_to_remove
]
NoDatesSafeLoader.remove_implicit_resolver('tag:yaml.org,2002:timestamp')
[docs]class YamlRender:
loads = lambda data: yaml.load(data, Loader=NoDatesSafeLoader)
dumps = lambda data: yaml.safe_dump(data, allow_unicode=True)
[docs]class BulletsSchema(Schema):
default = fields.Str(default="•")
_NUMBERING_VALIDATION = validate.OneOf(["numeric", "alpha", "roman"])
[docs]class NumberingSchema(Schema):
default = fields.Str(default="numeric", validate=_NUMBERING_VALIDATION)
[docs]class StyleFieldSchema(Schema):
fg = fields.Str(default="")
bg = fields.Str(default="")
[docs]class SpacingSchema(Schema):
top = fields.Int(default=0)
bottom = fields.Int(default=0)
left = fields.Int(default=0)
right = fields.Int(default=0)
[docs]class HeadingStyleSchema(Schema):
prefix = fields.Str()
suffix = fields.Str()
fg = fields.Str(default="")
bg = fields.Str(default="")
[docs]class HruleSchema(Schema):
char = fields.Str(default="─")
style = fields.Nested(StyleFieldSchema, default=StyleFieldSchema().dump({
"fg": "#777",
"bg": "default",
}))
[docs]class BlockQuoteSchema(Schema):
side = fields.Str(default="╎")
top_corner = fields.Str(default="┌")
bottom_corner = fields.Str(default="└")
style = fields.Nested(StyleFieldSchema, default=StyleFieldSchema().dump({
"fg": "italics,#aaa",
"bg": "default",
}))
[docs]class HeadingsSchema(Schema):
default = fields.Nested(HeadingStyleSchema, default={
"fg": "#346,bold",
"bg": "default",
"prefix": "░░░░░ ",
"suffix": "",
})
[docs]class TableSchema(Schema):
header_divider = fields.Str(default="─")
column_spacing = fields.Int(default=3)
[docs]class StyleSchema(Schema):
"""Styles schema for themes and style overrides within presentations
"""
style = fields.Str(
default="monokai",
validate=validate.OneOf(list(pygments.styles.get_all_styles())),
)
title = fields.Nested(StyleFieldSchema, default={
"fg": "#f30,bold,italics",
"bg": "default",
})
author = fields.Nested(StyleFieldSchema, default={
"fg": "#f30",
"bg": "default",
})
date = fields.Nested(StyleFieldSchema, default={
"fg": "#777",
"bg": "default",
})
slides = fields.Nested(StyleFieldSchema, default={
"fg": "#f30",
"bg": "default",
})
margin = fields.Nested(SpacingSchema, default={
"top": 0,
"bottom": 0,
"left": 2,
"right": 2,
})
padding = fields.Nested(SpacingSchema, default={
"top": 0,
"bottom": 0,
"left": 10,
"right": 10,
})
headings = fields.Nested(HeadingsSchema, default=HeadingsSchema().dump(HeadingsSchema()))
bullets = fields.Nested(BulletsSchema, default=BulletsSchema().dump(BulletsSchema()))
numbering = fields.Nested(NumberingSchema, default=NumberingSchema().dump(NumberingSchema()))
table = fields.Nested(TableSchema, default=TableSchema().dump(TableSchema()))
quote = fields.Nested(BlockQuoteSchema, default=BlockQuoteSchema().dump(BlockQuoteSchema()))
hrule = fields.Nested(HruleSchema, default=HruleSchema().dump(HruleSchema()))
link = fields.Nested(StyleFieldSchema, default={
"fg": "#33c,underline",
"bg": "default",
})