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"""
Summary
-------
This plugin allows easy, variable length summaries directly embedded into the
body of your articles.
"""
from __future__ import unicode_literals
from pelican import signals
from pelican.generators import ArticlesGenerator, StaticGenerator, PagesGenerator
def initialized(pelican):
from pelican.settings import DEFAULT_CONFIG
DEFAULT_CONFIG.setdefault('SUMMARY_BEGIN_MARKER',
'<!-- PELICAN_BEGIN_SUMMARY -->')
DEFAULT_CONFIG.setdefault('SUMMARY_END_MARKER',
'<!-- PELICAN_END_SUMMARY -->')
if pelican:
pelican.settings.setdefault('SUMMARY_BEGIN_MARKER',
'<!-- PELICAN_BEGIN_SUMMARY -->')
pelican.settings.setdefault('SUMMARY_END_MARKER',
'<!-- PELICAN_END_SUMMARY -->')
def extract_summary(instance):
# if summary is already specified, use it
# if there is no content, there's nothing to do
if hasattr(instance, '_summary'):
instance.has_summary = True
return
if not instance._content:
instance.has_summary = False
return
begin_marker = instance.settings['SUMMARY_BEGIN_MARKER']
end_marker = instance.settings['SUMMARY_END_MARKER']
content = instance._content
begin_summary = -1
end_summary = -1
if begin_marker:
begin_summary = content.find(begin_marker)
if end_marker:
end_summary = content.find(end_marker)
if begin_summary == -1 and end_summary == -1:
instance.has_summary = False
return
# skip over the begin marker, if present
if begin_summary == -1:
begin_summary = 0
else:
begin_summary = begin_summary + len(begin_marker)
if end_summary == -1:
end_summary = None
summary = content[begin_summary:end_summary]
# remove the markers from the content
if begin_summary:
content = content.replace(begin_marker, '', 1)
if end_summary:
content = content.replace(end_marker, '', 1)
instance._content = content
instance._summary = summary
instance.has_summary = True
def run_plugin(generators):
for generator in generators:
if isinstance(generator, ArticlesGenerator):
for article in generator.articles:
extract_summary(article)
elif isinstance(generator, PagesGenerator):
for page in generator.pages:
extract_summary(page)
def register():
signals.initialized.connect(initialized)
try:
signals.all_generators_finalized.connect(run_plugin)
except AttributeError:
# NOTE: This results in #314 so shouldn't really be relied on
# https://github.com/getpelican/pelican-plugins/issues/314
signals.content_object_init.connect(extract_summary)
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