#-----------------------------------------------------------------------------
# Copyright (c) 2012 - 2023, Anaconda, Inc., and Bokeh Contributors.
# All rights reserved.
#
# The full license is in the file LICENSE.txt, distributed with this software.
#-----------------------------------------------------------------------------
'''
'''
#-----------------------------------------------------------------------------
# Boilerplate
#-----------------------------------------------------------------------------
from __future__ import annotations
import logging # isort:skip
log = logging.getLogger(__name__)
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
# Standard library imports
from typing import TYPE_CHECKING, Any
# Bokeh imports
from ..models.ui import UIElement
from ..util.browser import NEW_PARAM, get_browser_controller
from .notebook import DEFAULT_JUPYTER_URL, ProxyUrlFunc, run_notebook_hook
from .saving import save
from .state import curstate
if TYPE_CHECKING:
from typing_extensions import TypeGuard
from ..application.application import Application
from ..application.handlers.function import ModifyDoc
from ..util.browser import BrowserLike, BrowserTarget
from .notebook import CommsHandle
from .state import State
#-----------------------------------------------------------------------------
# Globals and constants
#-----------------------------------------------------------------------------
__all__ = (
'show',
)
#-----------------------------------------------------------------------------
# General API
#-----------------------------------------------------------------------------
[docs]def show(obj: UIElement | Application | ModifyDoc, browser: str | None = None, new: BrowserTarget = "tab",
notebook_handle: bool = False, notebook_url: str | ProxyUrlFunc = DEFAULT_JUPYTER_URL,
**kwargs: Any) -> CommsHandle | None:
'''Immediately display a Bokeh object or application.
:func:`show` may be called multiple times in a single Jupyter notebook
cell to display multiple objects. The objects are displayed in order.
Args:
obj (UIElement or Application or callable) :
A Bokeh object to display.
Bokeh plots, widgets, layouts (i.e. rows and columns) may be
passed to ``show`` in order to display them. If |output_file|
has been called, the output will be saved to an HTML file, which is also
opened in a new browser window or tab. If |output_notebook|
has been called in a Jupyter notebook, the output will be inline
in the associated notebook output cell.
In a Jupyter notebook, a Bokeh application or callable may also
be passed. A callable will be turned into an Application using a
``FunctionHandler``. The application will be run and displayed
inline in the associated notebook output cell.
browser (str, optional) :
Specify the browser to use to open output files(default: None)
For file output, the **browser** argument allows for specifying
which browser to display in, e.g. "safari", "firefox", "opera",
"windows-default". Not all platforms may support this option, see
the documentation for the standard library
:doc:`webbrowser <python:library/webbrowser>` module for
more information
new (str, optional) :
Specify the browser mode to use for output files (default: "tab")
For file output, opens or raises the browser window showing the
current output file. If **new** is 'tab', then opens a new tab.
If **new** is 'window', then opens a new window.
notebook_handle (bool, optional) :
Whether to create a notebook interaction handle (default: False)
For notebook output, toggles whether a handle which can be used
with ``push_notebook`` is returned. Note that notebook handles
only apply to standalone plots, layouts, etc. They do not apply
when showing Applications in the notebook.
notebook_url (URL, optional) :
Location of the Jupyter notebook page (default: "localhost:8888")
When showing Bokeh applications, the Bokeh server must be
explicitly configured to allow connections originating from
different URLs. This parameter defaults to the standard notebook
host and port. If you are running on a different location, you
will need to supply this value for the application to display
properly. If no protocol is supplied in the URL, e.g. if it is
of the form "localhost:8888", then "http" will be used.
``notebook_url`` can also be a function that takes one int for the
bound server port. If the port is provided, the function needs
to generate the full public URL to the bokeh server. If None
is passed, the function is to generate the origin URL.
If the environment variable JUPYTER_BOKEH_EXTERNAL_URL is set
to the external URL of a JupyterHub, notebook_url is overridden
with a callable which enables Bokeh to traverse the JupyterHub
proxy without specifying this parameter.
Some parameters are only useful when certain output modes are active:
* The ``browser`` and ``new`` parameters only apply when |output_file|
is active.
* The ``notebook_handle`` parameter only applies when |output_notebook|
is active, and non-Application objects are being shown. It is only
supported in Jupyter notebook and raises an exception for other notebook
types when it is True.
* The ``notebook_url`` parameter only applies when showing Bokeh
Applications in a Jupyter notebook.
* Any additional keyword arguments are passed to :class:`~bokeh.server.Server` when
showing a Bokeh app (added in version 1.1)
Returns:
When in a Jupyter notebook (with |output_notebook| enabled)
and ``notebook_handle=True``, returns a handle that can be used by
``push_notebook``, None otherwise.
'''
state = curstate()
if isinstance(obj, UIElement):
return _show_with_state(obj, state, browser, new, notebook_handle=notebook_handle)
def is_application(obj: Any) -> TypeGuard[Application]:
return getattr(obj, '_is_a_bokeh_application_class', False)
if is_application(obj) or callable(obj): # TODO (bev) check callable signature more thoroughly
# This ugliness is to prevent importing bokeh.application (which would bring
# in Tornado) just in order to show a non-server object
assert state.notebook_type is not None
return run_notebook_hook(state.notebook_type, 'app', obj, state, notebook_url, **kwargs)
raise ValueError(_BAD_SHOW_MSG)
#-----------------------------------------------------------------------------
# Dev API
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Private API
#-----------------------------------------------------------------------------
_BAD_SHOW_MSG = """Invalid object to show. The object to passed to show must be one of:
* a UIElement (e.g. a plot, figure, widget or layout)
* a Bokeh Application
* a callable suitable to an application FunctionHandler
"""
def _show_file_with_state(obj: UIElement, state: State, new: BrowserTarget, controller: BrowserLike) -> None:
'''
'''
filename = save(obj, state=state)
controller.open("file://" + filename, new=NEW_PARAM[new])
def _show_with_state(obj: UIElement, state: State, browser: str | None,
new: BrowserTarget, notebook_handle: bool = False) -> CommsHandle | None:
'''
'''
controller = get_browser_controller(browser=browser)
comms_handle = None
shown = False
if state.notebook:
assert state.notebook_type is not None
comms_handle = run_notebook_hook(state.notebook_type, 'doc', obj, state, notebook_handle)
shown = True
if state.file or not shown:
_show_file_with_state(obj, state, new, controller)
return comms_handle
#-----------------------------------------------------------------------------
# Code
#-----------------------------------------------------------------------------