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112 lines
3.8 KiB
112 lines
3.8 KiB
6 years ago
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"""
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Summary
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-------
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This plugin allows easy, variable length summaries directly embedded into the
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body of your articles.
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"""
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from __future__ import unicode_literals
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from pelican import signals
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from pelican.generators import ArticlesGenerator, StaticGenerator, PagesGenerator
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import re
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def initialized(pelican):
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from pelican.settings import DEFAULT_CONFIG
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DEFAULT_CONFIG.setdefault('SUMMARY_BEGIN_MARKER',
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'<!-- PELICAN_BEGIN_SUMMARY -->')
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DEFAULT_CONFIG.setdefault('SUMMARY_END_MARKER',
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'<!-- PELICAN_END_SUMMARY -->')
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DEFAULT_CONFIG.setdefault('SUMMARY_USE_FIRST_PARAGRAPH', False)
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if pelican:
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pelican.settings.setdefault('SUMMARY_BEGIN_MARKER',
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'<!-- PELICAN_BEGIN_SUMMARY -->')
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pelican.settings.setdefault('SUMMARY_END_MARKER',
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'<!-- PELICAN_END_SUMMARY -->')
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pelican.settings.setdefault('SUMMARY_USE_FIRST_PARAGRAPH', False)
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def extract_summary(instance):
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# if summary is already specified, use it
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# if there is no content, there's nothing to do
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if hasattr(instance, '_summary') or 'summary' in instance.metadata:
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instance.has_summary = True
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return
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if not instance._content:
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instance.has_summary = False
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return
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begin_marker = instance.settings['SUMMARY_BEGIN_MARKER']
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end_marker = instance.settings['SUMMARY_END_MARKER']
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use_first_paragraph = instance.settings['SUMMARY_USE_FIRST_PARAGRAPH']
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remove_markers = True
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content = instance._update_content(instance._content, instance.settings['SITEURL'])
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begin_summary = -1
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end_summary = -1
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if begin_marker:
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begin_summary = content.find(begin_marker)
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if end_marker:
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end_summary = content.find(end_marker)
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if begin_summary == -1 and end_summary == -1 and use_first_paragraph:
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begin_marker, end_marker = '<p>', '</p>'
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remove_markers = False
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begin_summary = content.find(begin_marker)
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end_summary = content.find(end_marker)
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if begin_summary == -1 and end_summary == -1:
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instance.has_summary = False
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return
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# skip over the begin marker, if present
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if begin_summary == -1:
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begin_summary = 0
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else:
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begin_summary = begin_summary + len(begin_marker)
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if end_summary == -1:
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end_summary = None
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summary = content[begin_summary:end_summary]
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if remove_markers:
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# remove the markers from the content
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if begin_summary:
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content = content.replace(begin_marker, '', 1)
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if end_summary:
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content = content.replace(end_marker, '', 1)
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summary = re.sub(r"<div.*>", "", summary)
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summary = re.sub(r"</div>", "", summary)
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instance._content = content
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# default_status was added to Pelican Content objects after 3.7.1.
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# Its use here is strictly to decide on how to set the summary.
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# There's probably a better way to do this but I couldn't find it.
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if hasattr(instance, 'default_status'):
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instance.metadata['summary'] = summary
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else:
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instance._summary = summary
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instance.has_summary = True
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def run_plugin(generators):
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for generator in generators:
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if isinstance(generator, ArticlesGenerator):
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for article in generator.articles:
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extract_summary(article)
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elif isinstance(generator, PagesGenerator):
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for page in generator.pages:
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extract_summary(page)
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def register():
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signals.initialized.connect(initialized)
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try:
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signals.all_generators_finalized.connect(run_plugin)
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except AttributeError:
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# NOTE: This results in #314 so shouldn't really be relied on
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# https://github.com/getpelican/pelican-plugins/issues/314
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signals.content_object_init.connect(extract_summary)
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