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#!/usr/bin/env python |
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""" |
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Pandoc filter for adding beamer block on specific div. |
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""" |
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from panflute import Div, RawBlock, convert_text, run_filter # type: ignore |
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def prepare(doc): |
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""" |
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Prepare the document. |
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Arguments |
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--------- |
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doc |
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The pandoc document |
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""" |
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# Prepare the definitions |
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doc.defined = [] |
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# Get the meta data |
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meta = doc.get_metadata("pandoc-beamer-block") |
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if isinstance(meta, list): |
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# Loop on all definitions |
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for definition in meta: |
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# Verify the definition |
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if ( |
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isinstance(definition, dict) |
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and "classes" in definition |
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and isinstance(definition["classes"], list) |
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): |
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definition["classes"] = frozenset(definition["classes"]) |
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definition["type"] = definition.get("type", "info") |
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doc.defined.append(definition) |
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def latex(elem, environment, title, optional=False): |
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""" |
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Generate the LaTeX code. |
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Arguments |
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--------- |
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elem |
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The current element |
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environment |
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The environment to add |
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title |
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The environment title |
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optional |
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The title optionality |
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Returns |
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------- |
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A list of pandoc elements. |
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""" |
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if optional: |
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if title: |
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return [ |
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RawBlock(f"\\begin{{{environment}}}[{title}]", "tex"), |
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elem, |
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RawBlock(f"\\end{{{environment}}}", "tex"), |
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] |
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return [ |
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RawBlock(f"\\begin{{{environment}}}", "tex"), |
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elem, |
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RawBlock(f"\\end{{{environment}}}", "tex"), |
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] |
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return [ |
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RawBlock(f"\\begin{{{environment}}}{{{title}}}", "tex"), |
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elem, |
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RawBlock(f"\\end{{{environment}}}", "tex"), |
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] |
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# pylint: disable=too-many-return-statements |
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def block(elem, doc): |
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""" |
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Transform div element. |
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Arguments |
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--------- |
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elem |
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current element |
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doc |
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pandoc document |
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Returns |
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------- |
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A list of pandoc elements or None. |
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""" |
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if doc.format == "beamer" and isinstance(elem, Div): |
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classes = frozenset(elem.classes) |
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# Loop on all fontsize definition |
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for definition in doc.defined: |
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# Are the classes correct? |
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if classes >= definition["classes"]: |
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if "title" in elem.attributes: |
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title = convert_text( |
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elem.attributes["title"], |
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output_format="latex", |
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) |
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else: |
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title = "" |
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if definition["type"] == "alert": |
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return latex(elem, "alertblock", title) |
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if definition["type"] == "example": |
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return latex(elem, "exampleblock", title) |
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if definition["type"] in ( |
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"theorem", |
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"corollary", |
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"definition", |
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"lemma", |
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"fact", |
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): |
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return latex(elem, definition["type"], title, True) |
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return latex(elem, "block", title) |
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return None |
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def main(doc=None): |
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""" |
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Convert the pandoc document. |
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Arguments |
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--------- |
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doc |
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134
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pandoc document |
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Returns |
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------- |
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The modified pandoc document. |
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""" |
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return run_filter(block, doc=doc, prepare=prepare) |
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if __name__ == "__main__": |
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main() |
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chdemko /
pandoc-beamer-block
