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# encoding: utf-8
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"""A payload based version of page."""
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# Copyright (c) IPython Development Team.
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# Distributed under the terms of the Modified BSD License.
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from IPython.core.getipython import get_ipython
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#-----------------------------------------------------------------------------
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# Classes and functions
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#-----------------------------------------------------------------------------
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def page(strng, start=0, screen_lines=0, pager_cmd=None):
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"""Print a string, piping through a pager.
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This version ignores the screen_lines and pager_cmd arguments and uses
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IPython's payload system instead.
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Parameters
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----------
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strng : str or mime-dict
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Text to page, or a mime-type keyed dict of already formatted data.
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start : int
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Starting line at which to place the display.
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"""
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# Some routines may auto-compute start offsets incorrectly and pass a
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# negative value. Offset to 0 for robustness.
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start = max(0, start)
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shell = get_ipython()
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if isinstance(strng, dict):
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data = strng
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else:
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data = {'text/plain' : strng}
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payload = dict(
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source='page',
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data=data,
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start=start,
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screen_lines=screen_lines,
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)
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shell.payload_manager.write_payload(payload)
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def install_payload_page():
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"""Install this version of page as IPython.core.page.page."""
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from IPython.core import page as corepage
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corepage.page = page
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