#-----------------------------------------------------------------------------
# Copyright (c) 2012 - 2022, Anaconda, Inc., and Bokeh Contributors.
# All rights reserved.
#
# The full license is in the file LICENSE.txt, distributed with this software.
#-----------------------------------------------------------------------------
""" An abstraction over the document object model (DOM).
"""
#-----------------------------------------------------------------------------
# Boilerplate
#-----------------------------------------------------------------------------
from __future__ import annotations
import logging # isort:skip
log = logging.getLogger(__name__)
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
# Bokeh imports
from ..core.has_props import HasProps, abstract
from ..core.properties import (
Bool,
Dict,
Either,
Instance,
List,
Nullable,
Required,
String,
)
from ..core.property.bases import Init
from ..core.property.singletons import Intrinsic
from ..core.validation import error
from ..core.validation.errors import NOT_A_PROPERTY_OF
from ..model import Model, Qualified
from .css import Styles
from .renderers import RendererGroup
from .ui.ui_element import UIElement
#-----------------------------------------------------------------------------
# Globals and constants
#-----------------------------------------------------------------------------
__all__ = (
"Div",
"HTML",
"Span",
"Table",
"TableRow",
"Text",
)
#-----------------------------------------------------------------------------
# General API
#-----------------------------------------------------------------------------
@abstract
class DOMNode(Model, Qualified):
""" Base class for DOM nodes. """
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
class Text(DOMNode):
""" DOM text node. """
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
content = String("")
@abstract
class DOMElement(DOMNode):
""" Base class for DOM elements. """
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
style = Nullable(Either(Instance(Styles), Dict(String, String)))
children = List(Either(String, Instance(DOMNode), Instance(UIElement)), default=[])
class Span(DOMElement):
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
class Div(DOMElement):
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
class Table(DOMElement):
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
class TableRow(DOMElement):
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
@abstract
class Action(Model, Qualified):
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
class Template(DOMElement):
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
actions = List(Instance(Action))
class ToggleGroup(Action):
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
groups = List(Instance(RendererGroup))
@abstract
class Placeholder(DOMNode):
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
class ValueOf(Placeholder):
""" A placeholder for the value of a model's property. """
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
obj: HasProps = Required(Instance(HasProps), help="""
The object whose property will be observed.
""")
attr: str = Required(String, help="""
The name of the property whose value will be observed.
""")
@error(NOT_A_PROPERTY_OF)
def _check_if_an_attribute_is_a_property_of_a_model(self):
if self.obj.lookup(self.attr, raises=False):
return None
else:
return f"{self.attr} is not a property of {self.obj}"
class Index(Placeholder):
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
class ValueRef(Placeholder):
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
field = Required(String)
class ColorRef(ValueRef):
# explicit __init__ to support Init signatures
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
hex = Bool(default=True)
swatch = Bool(default=True)
class HTML(Model, Qualified):
""" A parsed HTML fragment with optional references to DOM nodes and UI elements. """
# explicit __init__ to support Init signatures
def __init__(self, html: Init[str | list[str | DOMNode | UIElement]] = Intrinsic, **kwargs) -> None:
super().__init__(html=html, **kwargs)
html = Required(Either(String, List(Either(String, Instance(DOMNode), Instance(UIElement)))), help="""
Either a parsed HTML string with optional references to Bokeh objects using
``