38 lines
1.2 KiB
Python
38 lines
1.2 KiB
Python
from markdown import Markdown
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from markdown.extensions import Extension
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from markdown.inlinepatterns import (
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IMAGE_LINK_RE,
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IMAGE_REFERENCE_RE,
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ImageInlineProcessor,
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ImageReferenceInlineProcessor,
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)
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class LazyImageInlineProcessor(ImageInlineProcessor):
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def handleMatch(self, m, data): # type: ignore
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el, match_start, index = super().handleMatch(m, data)
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if el is not None:
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el.set("loading", "lazy")
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return el, match_start, index # type: ignore
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class LazyImageReferenceInlineProcessor(ImageReferenceInlineProcessor):
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def makeTag(self, href, title, text): # type: ignore
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el = super().makeTag(href, title, text)
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if el is not None:
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el.set("loading", "lazy")
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return el
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class LazyLoadingImageExtension(Extension):
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def extendMarkdown(self, md: Markdown) -> None:
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md.inlinePatterns.register(
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LazyImageInlineProcessor(IMAGE_LINK_RE, md), "image_link", 150
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)
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md.inlinePatterns.register(
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LazyImageReferenceInlineProcessor(IMAGE_REFERENCE_RE, md),
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"image_reference",
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140,
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)
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md.registerExtension(self)
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