Source code for bokeh.protocol.messages.patch_doc

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# 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.
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# Boilerplate
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from __future__ import annotations

import logging # isort:skip
log = logging.getLogger(__name__)

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# Imports
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# Standard library imports
from typing import TYPE_CHECKING, Any

# Bokeh imports
from ...core.serialization import Serializer
from ...document.callbacks import invoke_with_curdoc
from ...document.json import PatchJson
from ..message import Message

if TYPE_CHECKING:
    from ...core.has_props import Setter
    from ...document.document import Document
    from ...document.events import DocumentPatchedEvent

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# Globals and constants
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__all__ = (
    'patch_doc',
)

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# General API
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# Dev API
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[docs]class patch_doc(Message[PatchJson]): ''' Define the ``PATCH-DOC`` message for sending Document patch events between remote documents. The ``content`` fragment of for this message is has the form: .. code-block:: python { 'events' : <protocol document events> 'references' : <model references> } ''' msgtype = 'PATCH-DOC'
[docs] @classmethod def create(cls, events: list[DocumentPatchedEvent], **metadata: Any) -> patch_doc: ''' Create a ``PATCH-DOC`` message Args: events (list) : A list of patch events to apply to a document Any additional keyword arguments will be put into the message ``metadata`` fragment as-is. ''' header = cls.create_header() if not events: raise ValueError("PATCH-DOC message requires at least one event") docs = {event.document for event in events} if len(docs) != 1: raise ValueError("PATCH-DOC message configured with events for more than one document") [doc] = docs serializer = Serializer(references=doc.models.synced_references) patch_json = PatchJson(events=serializer.encode(events)) doc.models.flush() msg = cls(header, metadata, patch_json) for buffer in serializer.buffers: msg.add_buffer(buffer) return msg
[docs] def apply_to_document(self, doc: Document, setter: Setter | None = None) -> None: ''' ''' invoke_with_curdoc(doc, lambda: doc.apply_json_patch(self.payload, setter=setter))
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