You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
74 lines
2.9 KiB
74 lines
2.9 KiB
from panflute import *
|
|
import re
|
|
|
|
# Import local files
|
|
from whitespace import *
|
|
from command import *
|
|
from util import *
|
|
from context import *
|
|
|
|
def transform(e: Element, c: Context) -> Element: # Returns next sibling element to transform
|
|
"""Transform the AST, making format-agnostic changes."""
|
|
|
|
if isinstance(e, Whitespace) and bavlna(e):
|
|
e = NBSP()
|
|
|
|
if hasattr(e, "attributes"):
|
|
# `if` attribute. Only show this element if flag is set.
|
|
if "if" in e.attributes:
|
|
if not c.is_flag_set(e.attributes["if"]):
|
|
return nullify(e)
|
|
# `ifn` attribute. Only show this element if flag is NOT set
|
|
if "ifn" in e.attributes:
|
|
if c.is_flag_set(e.attributes["ifn"]):
|
|
return nullify(e)
|
|
|
|
# `c` attribute. Execute a command with the name saved in this attribute.
|
|
if (isinstance(e, Div) or isinstance(e, Span)) and "c" in e.attributes:
|
|
if isinstance(e, Div):
|
|
e = BlockCommand(*e.content, identifier=e.identifier, classes=e.classes, attributes=e.attributes)
|
|
else:
|
|
e = InlineCommand(*e.content, identifier=e.identifier, classes=e.classes, attributes=e.attributes)
|
|
|
|
# `partial` attribute.
|
|
# This is for including content from files with their own flags and
|
|
# commands without affecting the state of the current document.
|
|
if (isinstance(e, Div)) and "partial" in e.attributes:
|
|
includedDoc = import_md(open(e.attributes["partial"], "r").read())
|
|
nContext = Context(includedDoc, c)
|
|
includedDoc = includedDoc.walk(transform, nContext)
|
|
e = Div(*includedDoc.content)
|
|
|
|
# Execute python code inside source code block
|
|
if isinstance(e, CodeBlock) and hasattr(e, "classes") and "python" in e.classes and "run" in e.classes:
|
|
e = executeCommand(e.text, None, c)
|
|
|
|
## Command defines
|
|
# possible TODO: def/longdef?
|
|
if isinstance(e, CodeBlock) and hasattr(e, "classes") and "python" in e.classes and hasattr(e, "attributes"):
|
|
e = handle_command_define(e, c)
|
|
|
|
## Shorthands
|
|
if isinstance(e, Span) and len(e.content) == 1 and isinstance(e.content[0], Str):
|
|
## Handle special command shorthand [!commandname]{}
|
|
if re.match(r"^![\w.]+$", e.content[0].text):
|
|
e = InlineCommand(identifier=e.identifier, classes=e.classes, attributes={**e.attributes, "c": e.content[0].text[1:]})
|
|
|
|
## Handle import [#path/file.md]{}
|
|
# This is the exact opposite of include. We take the commands
|
|
# and flags but drop the content.
|
|
elif re.match(r"^#.+$", e.content[0].text):
|
|
importedDoc = import_md(open(e.content[0].text[1:], "r").read())
|
|
importedDoc.walk(transform, c)
|
|
return nullify(e)
|
|
|
|
## Execute commands
|
|
# panflute's walk transforms the children first, then the root element, so
|
|
# the content of the element the command receives is already transformed.
|
|
if isinstance(e, Command):
|
|
if not c.get_command(e.attributes["c"]):
|
|
raise NameError(f"Command not defined '{e.attributes['c']}'.")
|
|
e = e.replaceSelf(executeCommand(c.get_command(e.attributes["c"]), e, c))
|
|
e.walk(transform, c)
|
|
|
|
return e
|
|
|