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114 lines
4.0 KiB
114 lines
4.0 KiB
8 months ago
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from __future__ import unicode_literals
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# Copyright (c) 2006-2021 Andrey Golovizin
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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import six
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import pybtex.io
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from pybtex.plugin import Plugin
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class BaseBackend(Plugin):
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"""This is the base class for the backends. We encourage
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you to implement as many of the symbols and tags as
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possible when you create a new plugin.
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symbols[u'ndash'] : Used to separate pages
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symbols[u'newblock'] : Used to separate entries in the bibliography
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symbols[u'nbsp'] : A non-breakable space
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tags[u'em'] : emphasize text
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tags[u'strong'] : emphasize text even more
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tags[u'i'] : italicize text, not semantic
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tags[u'b'] : embolden text, not semantic
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tags[u'tt'] : typewrite text, not semantic
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"""
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RenderType = six.string_types #: the result of render and render_sequence
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default_suffix = None #: the default suffix for an output file
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def __init__(self, encoding=None):
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self.encoding = encoding or pybtex.io.get_default_encoding()
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def write_prologue(self):
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pass
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def write_epilogue(self):
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pass
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def format_str(self, str_):
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"""Format the given string *str_*.
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The default implementation simply returns the string ad verbatim.
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Override this method for non-string backends.
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"""
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return str_
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def format_tag(self, tag_name, text):
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"""Format a tag with some text inside.
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*tag_name* is a str, and *text* is a rendered Text object.
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"""
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raise NotImplementedError
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def format_href(self, url, text):
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"""Format a hyperlink with some text inside.
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*url* is a str, and *text* is a rendered Text object.
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"""
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raise NotImplementedError
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def format_protected(self, text):
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"""Format a "protected" piece of text.
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In LaTeX backend, it is formatted as a {braced group}.
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Most other backends would just output the text as-is.
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"""
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return text
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def render_sequence(self, rendered_list):
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"""Render a sequence of rendered Text objects.
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The default implementation simply concatenates
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the strings in rendered_list.
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Override this method for non-string backends.
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"""
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return "".join(rendered_list)
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def write_entry(self, label, key, text):
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raise NotImplementedError
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def write_to_file(self, formatted_entries, filename):
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with pybtex.io.open_unicode(filename, "w", self.encoding) as stream:
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self.write_to_stream(formatted_entries, stream)
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if hasattr(stream, 'getvalue'):
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return stream.getvalue()
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def write_to_stream(self, formatted_bibliography, stream):
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self.output = stream.write
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self.formatted_bibliography = formatted_bibliography
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self.write_prologue()
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for entry in formatted_bibliography:
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self.write_entry(entry.key, entry.label, entry.text.render(self))
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self.write_epilogue()
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