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77 lines
2.5 KiB
77 lines
2.5 KiB
6 years ago
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"""Define a Jinja2 processor which embeds the (presumably HTML) input stream into a Page Template
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as defined in the ctx metadata (the ``content`` variable is assigned to the input stream and
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the target template is rendered)."""
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import os
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from typing import Iterable, Optional, Dict, cast
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from jinja2 import Environment, FileSystemLoader
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from .processors import Processor
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class Jinja2PageEmbed(Processor):
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"""Embed input stream as ``content`` variable in page template defined in context key ``template``."""
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def filename(self, oldname: str, ctx: Optional[Dict] = None) -> str:
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"""Return the filename of the post-processed file.
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Arguments:
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oldname (str): the previous name for the file.
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ctx (dict, optional): A context object generated from the processor configuration
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Returns:
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str: the new name for the file
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"""
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return os.path.splitext(oldname)[0] + ".html"
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def mime_type(self, oldname: str, ctx: Optional[Dict] = None) -> str:
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"""Return the mimetype of the post-processed file.
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Arguments:
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oldname (str): the input filename
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ctx (dict, optional): A context object generated from the processor configuration
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Returns:
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str: the new mimetype of the file after processing
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"""
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return "text/html"
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def process(self, input_file: Iterable, ctx: Optional[Dict] = None) -> Iterable:
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"""Return an iterable object of the post-processed file.
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Arguments:
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input_file (iterable): An input stream
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ctx (dict, optional): A context object generated from the processor configuration
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Returns:
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iterable: The post-processed output stream
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"""
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ctx = cast(Dict, ctx)
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template_env = Environment(loader=FileSystemLoader(ctx["templates"]))
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template_env.globals.update(ctx["globals"])
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template_env.filters.update(ctx["filters"])
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tmpl = template_env.get_template(ctx["template"])
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content = "".join([x for x in input_file])
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return tmpl.render(content=content, metadata=ctx)
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def extension(self, oldname: str, ctx: Optional[Dict] = None) -> str:
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"""Return the mimetype of the post-processed file.
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Arguments:
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oldname (str): the input filename
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ctx (dict, optional): A context object generated from the processor configuration
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Returns:
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str: the new extension of the file after processing
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"""
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return "html"
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processor = Jinja2PageEmbed
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