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#!/usr/bin/env python3
from panflute import *
import re
import sys
from typing import List
# Import local files
from whitespace import *
from command import *
from util import *
from mj_show import show
flags = ["dog"]
commands = {}
def executeCommand(source: Code, element: Element) -> List[Element]:
mode = 'empty'
text = ""
content = []
def print(s: str=""):
nonlocal mode, text
if mode == 'elements':
raise SyntaxError("Cannot use `print` and `appendChild` in one command at the same time.")
mode = 'text'
text += s
def println(s: str=""):
print(s+"\n")
def appendChild(e: Element):
nonlocal mode, content
if mode == 'text':
raise SyntaxError("Cannot use `print` and `appendChild` in one command at the same time.")
mode = 'elements'
content.append(e)
def appendChildren(l: List[Element]):
for e in l:
appendChild(e)
exec(source)
if mode == 'text':
return convert_text(text)
if mode == 'elements':
return content
return []
def transform(e: Element, doc: Doc) -> Element: # Returns next sibling element to transform
"""Transform the AST, making format-agnostic changes."""
global commands
global flags
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 e.attributes["if"] in flags:
return nullify(e)
# `ifn` attribute. Only show this element if flag is NOT set
if "ifn" in e.attributes:
if e.attributes["ifn"] in flags:
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())
oFlags = flags[:]
oCommands = commands.copy()
includedDoc = includedDoc.walk(transform)
flags = oFlags
commands = oCommands
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:
exec(e.text)
return nullify(e)
## Command defines
# possible TODO: def/longdef?
if isinstance(e, CodeBlock) and hasattr(e, "classes") and "python" in e.classes and hasattr(e, "attributes"):
if "define" in e.attributes:
if not e.attributes["define"] in commands:
commands[e.attributes["define"]] = compile(e.text, '<string>', 'exec')
return nullify(e)
else:
raise NameError(f"Command already defined: '{e.attributes['define']}'")
if "redefine" in e.attributes:
commands[e.attributes["redefine"]] = compile(e.text, '<string>', 'exec')
return nullify(e)
## 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)
return nullify(e)
## Execute commands
# 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 e.attributes["c"] in commands:
raise NameError(f"Command not defined '{e.attributes['c']}'.")
e = e.replaceSelf(executeCommand(commands[e.attributes["c"]], e))
e.walk(transform)
return e
doc = import_md(open(sys.argv[1], "r").read())
print(show(doc))
doc = doc.walk(transform)
print("---------------------")
#print(show(doc))
print(convert_text(doc, input_format="panflute", output_format="markdown"))