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#!/usr/bin/env python
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# encoding: utf-8
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"""
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A payload based version of page.
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Authors:
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* Brian Granger
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* Fernando Perez
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"""
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#-----------------------------------------------------------------------------
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# Copyright (C) 2008-2010 The IPython Development Team
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#
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# Distributed under the terms of the BSD License. The full license is in
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# the file COPYING, distributed as part of this software.
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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from IPython.core.interactiveshell import InteractiveShell
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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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"""
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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 = InteractiveShell.instance()
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payload = dict(
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source='IPython.zmq.page.page',
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data=strng,
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start_line_number=start
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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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