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88 lines
2.7 KiB
88 lines
2.7 KiB
#!/usr/bin/env python3
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# Import local files
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from whitespace import *
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from command import *
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from util import *
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import builtin_commands
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from panflute import *
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import re
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import sys
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from mj_show import show
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flags = ["dog"]
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def transform(e: Element):
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"""Transform the AST, making format-agnostic changes."""
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if isinstance(e, Whitespace) and bavlna(e):
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e = replaceEl(e, NBSP())
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if hasattr(e, "attributes"):
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# `if` attribute. Only show this element if flag is set.
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if "if" in e.attributes:
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if not e.attributes["if"] in flags:
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deleteEl(e)
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return
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# `ifn` attribute. Only show this element if flag is NOT set
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if "ifn" in e.attributes:
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if e.attributes["ifn"] in flags:
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deleteEl(e)
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return
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# `c` attribute. Execute a command with the name saved in this attribute.
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if (isinstance(e, Div) or isinstance(e, Span)) and "c" in e.attributes:
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if isinstance(e, Div):
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e = replaceEl(e, MultilineCommand(*e.content, identifier=e.identifier, classes=e.classes, attributes=e.attributes))
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else:
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e = replaceEl(e, InlineCommand(*e.content, identifier=e.identifier, classes=e.classes, attributes=e.attributes))
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if isinstance(e, CodeBlock) and hasattr(e, "classes") and "python" in e.classes and "run" in e.classes:
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exec(e.text)
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deleteEl(e)
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return
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# Handle special command shorthand [!commandname]{}
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if isinstance(e, Span) and len(e.content) == 1 and isinstance(e.content[0], Str) and re.match(r"^![\w.]+$", e.content[0].text):
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e = replaceEl(e, InlineCommand(identifier=e.identifier, classes=e.classes, attributes={**e.attributes, "c": e.content[0].text[1:]}))
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# The command is executed first and then its contents are transformed. TODO: Is this what we want?
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if isinstance(e, Command):
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if re.match(r"^[\w.]+$", e.attributes["c"]):
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try:
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e = e.call(eval(e.attributes["c"]))
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except NameError:
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raise NameError(f"Command not found: '{e.attributes['c']}'.")
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else:
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raise SyntaxError(f"Invalid command syntax: '{e.attributes['c']}'.")
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# Recursively transform all contents.
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if hasattr(e, "content"):
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for c in e.content:
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# Deleted elements are only marked to be deleted with a class, because otherwise
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# it would mess up this for cycle.
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transform(c)
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# Delete elements marked to be deleted. This is somewhat inelegant.
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ci = 0
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while ci < len(e.content):
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c = e.content[ci]
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if hasattr(c, "classes") and "deleted" in c.classes:
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del e.content[ci]
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else:
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ci+=1
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doc = convert_text(open(sys.argv[1], "r").read(), standalone=True, extra_args=["-f", "markdown+fenced_code_attributes"])
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print(show(doc))
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transform(doc)
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print("---------------------")
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print(convert_text(doc, input_format="panflute", output_format="markdown"))
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