mirror of https://github.com/python/cpython
Define & use a Conversion object. It's still really ugly, but at
least there's a token object in here now! ;-)
This commit is contained in:
Fred Drake
parent
b0bc7f2d6c
commit
96c00b0b5e
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@ -27,7 +27,7 @@ class LaTeXFormatError(Error):
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_begin_env_rx = re.compile(r"[\\]begin{([^}]*)}")
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_begin_env_rx = re.compile(r"[\\]begin{([^}]*)}")
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_end_env_rx = re.compile(r"[\\]end{([^}]*)}")
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_end_env_rx = re.compile(r"[\\]end{([^}]*)}")
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_begin_macro_rx = re.compile("[\\\\]([a-zA-Z]+[*]?)({|\\s*\n?)")
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_begin_macro_rx = re.compile("[\\\\]([a-zA-Z]+[*]?)({|\\s*\n?)")
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_comment_rx = re.compile("%+ ?(.*)\n *")
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_comment_rx = re.compile("%+ ?(.*)\n[ \t]*")
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_text_rx = re.compile(r"[^]%\\{}]+")
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_text_rx = re.compile(r"[^]%\\{}]+")
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_optional_rx = re.compile(r"\s*[[]([^]]*)[]]")
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_optional_rx = re.compile(r"\s*[[]([^]]*)[]]")
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# _parameter_rx is this complicated to allow {...} inside a parameter;
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# _parameter_rx is this complicated to allow {...} inside a parameter;
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@ -50,248 +50,276 @@ def popping(name, point, depth):
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sys.stderr.write("%s</%s> at %s\n" % (" "*depth, name, point))
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sys.stderr.write("%s</%s> at %s\n" % (" "*depth, name, point))
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def subconvert(line, ofp, table, discards, autoclosing, endchar=None, depth=0):
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class Conversion:
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if DEBUG and endchar:
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def __init__(self, ifp, ofp, table=None, discards=(), autoclosing=()):
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sys.stderr.write("subconvert(%s, ..., endchar=%s)\n"
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self.ofp_stack = [ofp]
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% (`line[:20]`, `endchar`))
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self.pop_output()
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stack = []
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self.table = table
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while line:
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self.discards = discards
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if line[0] == endchar and not stack:
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self.autoclosing = autoclosing
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if DEBUG:
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self.line = string.join(map(string.rstrip, ifp.readlines()), "\n")
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sys.stderr.write("subconvert() --> %s\n" % `line[1:21]`)
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self.err_write = sys.stderr.write
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return line[1:]
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self.preamble = 1
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m = _comment_rx.match(line)
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if m:
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def push_output(self, ofp):
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text = m.group(1)
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self.ofp_stack.append(self.ofp)
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if text:
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self.ofp = ofp
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ofp.write("(COMMENT\n- %s \n)COMMENT\n-\\n\n" % encode(text))
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self.write = ofp.write
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line = line[m.end():]
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continue
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def pop_output(self):
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m = _begin_env_rx.match(line)
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self.ofp = self.ofp_stack.pop()
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if m:
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self.write = self.ofp.write
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# re-write to use the macro handler
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line = r"\%s %s" % (m.group(1), line[m.end():])
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def subconvert(self, endchar=None, depth=0):
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continue
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if DEBUG and endchar:
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m = _end_env_rx.match(line)
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self.err_write(
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if m:
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"subconvert(%s)\n line = %s\n" % (`endchar`, `line[:20]`))
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# end of environment
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stack = []
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envname = m.group(1)
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line = self.line
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if envname == "document":
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while line:
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# special magic
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if line[0] == endchar and not stack:
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for n in stack[1:]:
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if DEBUG:
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if n not in autoclosing:
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self.err_write("subconvert() --> %s\n" % `line[1:21]`)
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raise LaTeXFormatError("open element on stack: " + `n`)
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self.line = line
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# should be more careful, but this is easier to code:
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return line
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stack = []
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m = _comment_rx.match(line)
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ofp.write(")document\n")
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if m:
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elif envname == stack[-1]:
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text = m.group(1)
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ofp.write(")%s\n" % envname)
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if text:
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del stack[-1]
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self.write("(COMMENT\n- %s \n)COMMENT\n-\\n\n"
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popping(envname, "a", len(stack) + depth)
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% encode(text))
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else:
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sys.stderr.write("stack: %s\n" % `stack`)
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raise LaTeXFormatError(
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"environment close for %s doesn't match" % envname)
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line = line[m.end():]
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continue
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m = _begin_macro_rx.match(line)
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if m:
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# start of macro
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macroname = m.group(1)
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if macroname == "verbatim":
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# really magic case!
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pos = string.find(line, "\\end{verbatim}")
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text = line[m.end(1):pos]
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ofp.write("(verbatim\n")
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ofp.write("-%s\n" % encode(text))
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ofp.write(")verbatim\n")
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line = line[pos + len("\\end{verbatim}"):]
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continue
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numbered = 1
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if macroname[-1] == "*":
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macroname = macroname[:-1]
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numbered = 0
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if macroname in autoclosing and macroname in stack:
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while stack[-1] != macroname:
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if stack[-1] and stack[-1] not in discards:
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ofp.write(")%s\n-\\n\n" % stack[-1])
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popping(stack[-1], "b", len(stack) + depth - 1)
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del stack[-1]
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if macroname not in discards:
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ofp.write("-\\n\n)%s\n-\\n\n" % macroname)
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popping(macroname, "c", len(stack) + depth - 1)
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del stack[-1]
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real_ofp = ofp
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if macroname in discards:
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ofp = StringIO.StringIO()
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#
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conversion = table.get(macroname, ([], 0, 0, 0, 0))
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params, optional, empty, environ, nocontent = conversion
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if empty:
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ofp.write("e\n")
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elif nocontent:
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empty = 1
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if not numbered:
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ofp.write("Anumbered TOKEN no\n")
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opened = 0
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# rip off the macroname
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if params:
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if optional and len(params) == 1:
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line = line = line[m.end():]
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else:
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line = line[m.end(1):]
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elif empty:
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line = line[m.end(1):]
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else:
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line = line[m.end():]
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line = line[m.end():]
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#
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# Very ugly special case to deal with \item[]. The catch is that
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# this needs to occur outside the for loop that handles attribute
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# parsing so we can 'continue' the outer loop.
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#
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if optional and type(params[0]) is type(()):
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# the attribute name isn't used in this special case
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pushing(macroname, "a", depth + len(stack))
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stack.append(macroname)
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ofp.write("(%s\n" % macroname)
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m = _start_optional_rx.match(line)
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if m:
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line = line[m.end():]
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line = subconvert(line, ofp, table, discards,
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autoclosing, endchar="]",
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depth=depth + len(stack))
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line = "}" + line
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continue
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continue
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# handle attribute mappings here:
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m = _begin_env_rx.match(line)
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for attrname in params:
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if m:
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if optional:
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# re-write to use the macro handler
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optional = 0
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line = r"\%s %s" % (m.group(1), line[m.end():])
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if type(attrname) is type(""):
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continue
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m = _optional_rx.match(line)
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m = _end_env_rx.match(line)
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if m:
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# end of environment
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envname = m.group(1)
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if envname == "document":
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# special magic
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for n in stack[1:]:
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if n not in self.autoclosing:
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raise LaTeXFormatError(
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"open element on stack: " + `n`)
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# should be more careful, but this is easier to code:
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stack = []
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self.write(")document\n")
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elif envname == stack[-1]:
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self.write(")%s\n" % envname)
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del stack[-1]
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popping(envname, "a", len(stack) + depth)
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else:
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self.err_write("stack: %s\n" % `stack`)
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raise LaTeXFormatError(
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"environment close for %s doesn't match" % envname)
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line = line[m.end():]
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continue
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m = _begin_macro_rx.match(line)
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if m:
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# start of macro
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macroname = m.group(1)
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if macroname == "verbatim":
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# really magic case!
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pos = string.find(line, "\\end{verbatim}")
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text = line[m.end(1):pos]
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self.write("(verbatim\n")
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self.write("-%s\n" % encode(text))
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self.write(")verbatim\n")
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line = line[pos + len("\\end{verbatim}"):]
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continue
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numbered = 1
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opened = 0
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if macroname[-1] == "*":
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macroname = macroname[:-1]
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numbered = 0
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if macroname in self.autoclosing and macroname in stack:
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while stack[-1] != macroname:
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top = stack.pop()
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if top and top not in self.discards:
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self.write(")%s\n-\\n\n" % top)
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popping(top, "b", len(stack) + depth)
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if macroname not in self.discards:
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self.write("-\\n\n)%s\n-\\n\n" % macroname)
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popping(macroname, "c", len(stack) + depth - 1)
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del stack[-1]
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#
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if macroname in self.discards:
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self.push_output(StringIO.StringIO())
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else:
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self.push_output(self.ofp)
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#
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params, optional, empty, environ = self.start_macro(macroname)
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if not numbered:
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self.write("Anumbered TOKEN no\n")
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# rip off the macroname
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if params:
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if optional and len(params) == 1:
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line = line[m.end():]
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else:
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line = line[m.end(1):]
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elif empty:
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line = line[m.end(1):]
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else:
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line = line[m.end():]
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#
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# Very ugly special case to deal with \item[]. The catch
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# is that this needs to occur outside the for loop that
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# handles attribute parsing so we can 'continue' the outer
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# loop.
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#
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if optional and type(params[0]) is type(()):
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# the attribute name isn't used in this special case
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pushing(macroname, "a", depth + len(stack))
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stack.append(macroname)
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self.write("(%s\n" % macroname)
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m = _start_optional_rx.match(line)
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if m:
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self.line = line[m.end():]
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line = self.subconvert("]", depth + len(stack))
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line = "}" + line
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continue
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# handle attribute mappings here:
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for attrname in params:
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if optional:
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optional = 0
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if type(attrname) is type(""):
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m = _optional_rx.match(line)
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if m:
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line = line[m.end():]
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self.write("A%s TOKEN %s\n"
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% (attrname, encode(m.group(1))))
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elif type(attrname) is type(()):
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# This is a sub-element; but don't place the
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# element we found on the stack (\section-like)
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pushing(macroname, "b", len(stack) + depth)
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stack.append(macroname)
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self.write("(%s\n" % macroname)
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macroname = attrname[0]
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m = _start_group_rx.match(line)
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if m:
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if m:
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line = line[m.end():]
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line = line[m.end():]
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ofp.write("A%s TOKEN %s\n"
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elif type(attrname) is type([]):
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% (attrname, encode(m.group(1))))
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# A normal subelement.
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elif type(attrname) is type(()):
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attrname = attrname[0]
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# This is a sub-element; but don't place the
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if not opened:
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# element we found on the stack (\section-like)
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opened = 1
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pushing(macroname, "b", len(stack) + depth)
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self.write("(%s\n" % macroname)
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stack.append(macroname)
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pushing(macroname, "c", len(stack) + depth)
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ofp.write("(%s\n" % macroname)
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self.write("(%s\n" % attrname)
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macroname = attrname[0]
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pushing(attrname, "sub-elem", len(stack) + depth + 1)
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m = _start_group_rx.match(line)
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self.line = skip_white(line)[1:]
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if m:
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line = subconvert("}", depth + len(stack) + 2)
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popping(attrname, "sub-elem", len(stack) + depth + 1)
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self.write(")%s\n" % attrname)
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else:
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m = _parameter_rx.match(line)
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if not m:
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raise LaTeXFormatError(
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"could not extract parameter %s for %s: %s"
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% (attrname, macroname, `line[:100]`))
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value = m.group(1)
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if _token_rx.match(value):
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dtype = "TOKEN"
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else:
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dtype = "CDATA"
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self.write("A%s %s %s\n"
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% (attrname, dtype, encode(value)))
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line = line[m.end():]
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line = line[m.end():]
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elif type(attrname) is type([]):
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if params and type(params[-1]) is type('') \
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# A normal subelement.
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and (not empty) and not environ:
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attrname = attrname[0]
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# attempt to strip off next '{'
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if not opened:
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m = _start_group_rx.match(line)
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opened = 1
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ofp.write("(%s\n" % macroname)
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pushing(macroname, "c", len(stack) + depth)
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ofp.write("(%s\n" % attrname)
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pushing(attrname, "sub-elem", len(stack) + depth + 1)
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line = subconvert(skip_white(line)[1:], ofp, table,
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discards, autoclosing, endchar="}",
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depth=depth + len(stack) + 2)
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popping(attrname, "sub-elem", len(stack) + depth + 1)
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ofp.write(")%s\n" % attrname)
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else:
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m = _parameter_rx.match(line)
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if not m:
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if not m:
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raise LaTeXFormatError(
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raise LaTeXFormatError(
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"could not extract parameter %s for %s: %s"
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"non-empty element '%s' has no content: %s"
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% (attrname, macroname, `line[:100]`))
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% (macroname, line[:12]))
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value = m.group(1)
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if _token_rx.match(value):
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dtype = "TOKEN"
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else:
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dtype = "CDATA"
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ofp.write("A%s %s %s\n"
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% (attrname, dtype, encode(value)))
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line = line[m.end():]
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line = line[m.end():]
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if params and type(params[-1]) is type('') \
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if not opened:
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and (not empty) and not environ:
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self.write("(%s\n" % macroname)
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# attempt to strip off next '{'
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pushing(macroname, "d", len(stack) + depth)
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m = _start_group_rx.match(line)
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if empty:
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if not m:
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line = "}" + line
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raise LaTeXFormatError(
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stack.append(macroname)
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"non-empty element '%s' has no content: %s"
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self.pop_output()
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% (macroname, line[:12]))
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continue
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if line[0] == endchar and not stack:
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if DEBUG:
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self.err_write("subconvert() --> %s\n" % `line[1:21]`)
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self.line = line[1:]
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return self.line
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if line[0] == "}":
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# end of macro or group
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macroname = stack[-1]
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conversion = self.table.get(macroname)
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if macroname \
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and macroname not in self.discards \
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||||||
|
and type(conversion) is not type(""):
|
||||||
|
# otherwise, it was just a bare group
|
||||||
|
self.write(")%s\n" % stack[-1])
|
||||||
|
popping(macroname, "d", len(stack) + depth - 1)
|
||||||
|
del stack[-1]
|
||||||
|
line = line[1:]
|
||||||
|
continue
|
||||||
|
if line[0] == "{":
|
||||||
|
pushing("", "e", len(stack) + depth)
|
||||||
|
stack.append("")
|
||||||
|
line = line[1:]
|
||||||
|
continue
|
||||||
|
if line[0] == "\\" and line[1] in ESCAPED_CHARS:
|
||||||
|
self.write("-%s\n" % encode(line[1]))
|
||||||
|
line = line[2:]
|
||||||
|
continue
|
||||||
|
if line[:2] == r"\\":
|
||||||
|
self.write("(BREAK\n)BREAK\n")
|
||||||
|
line = line[2:]
|
||||||
|
continue
|
||||||
|
m = _text_rx.match(line)
|
||||||
|
if m:
|
||||||
|
text = encode(m.group())
|
||||||
|
self.write("-%s\n" % text)
|
||||||
line = line[m.end():]
|
line = line[m.end():]
|
||||||
if not opened:
|
continue
|
||||||
ofp.write("(%s\n" % macroname)
|
# special case because of \item[]
|
||||||
pushing(macroname, "d", len(stack) + depth)
|
if line[0] == "]":
|
||||||
if empty:
|
self.write("-]\n")
|
||||||
line = "}" + line
|
line = line[1:]
|
||||||
stack.append(macroname)
|
continue
|
||||||
ofp = real_ofp
|
# avoid infinite loops
|
||||||
continue
|
extra = ""
|
||||||
if line[0] == endchar and not stack:
|
if len(line) > 100:
|
||||||
if DEBUG:
|
extra = "..."
|
||||||
sys.stderr.write("subconvert() --> %s\n" % `line[1:21]`)
|
raise LaTeXFormatError("could not identify markup: %s%s"
|
||||||
return line[1:]
|
% (`line[:100]`, extra))
|
||||||
if line[0] == "}":
|
while stack and stack[-1] in self.autoclosing:
|
||||||
# end of macro
|
self.write("-\\n\n")
|
||||||
macroname = stack[-1]
|
self.write(")%s\n" % stack[-1])
|
||||||
conversion = table.get(macroname)
|
popping(stack.pop(), "e", len(stack) + depth - 1)
|
||||||
if macroname \
|
if stack:
|
||||||
and macroname not in discards \
|
raise LaTeXFormatError("elements remain on stack: "
|
||||||
and type(conversion) is not type(""):
|
+ string.join(stack, ", "))
|
||||||
# otherwise, it was just a bare group
|
# otherwise we just ran out of input here...
|
||||||
ofp.write(")%s\n" % stack[-1])
|
|
||||||
popping(macroname, "d", len(stack) + depth - 1)
|
def convert(self):
|
||||||
del stack[-1]
|
self.subconvert()
|
||||||
line = line[1:]
|
|
||||||
continue
|
def start_macro(self, name):
|
||||||
if line[0] == "{":
|
conversion = self.table.get(name, ([], 0, 0, 0, 0))
|
||||||
pushing("", "e", len(stack) + depth)
|
params, optional, empty, environ, nocontent = conversion
|
||||||
stack.append("")
|
if empty:
|
||||||
line = line[1:]
|
self.write("e\n")
|
||||||
continue
|
elif nocontent:
|
||||||
if line[0] == "\\" and line[1] in ESCAPED_CHARS:
|
empty = 1
|
||||||
ofp.write("-%s\n" % encode(line[1]))
|
return params, optional, empty, environ
|
||||||
line = line[2:]
|
|
||||||
continue
|
|
||||||
if line[:2] == r"\\":
|
|
||||||
ofp.write("(BREAK\n)BREAK\n")
|
|
||||||
line = line[2:]
|
|
||||||
continue
|
|
||||||
m = _text_rx.match(line)
|
|
||||||
if m:
|
|
||||||
text = encode(m.group())
|
|
||||||
ofp.write("-%s\n" % text)
|
|
||||||
line = line[m.end():]
|
|
||||||
continue
|
|
||||||
# special case because of \item[]
|
|
||||||
if line[0] == "]":
|
|
||||||
ofp.write("-]\n")
|
|
||||||
line = line[1:]
|
|
||||||
continue
|
|
||||||
# avoid infinite loops
|
|
||||||
extra = ""
|
|
||||||
if len(line) > 100:
|
|
||||||
extra = "..."
|
|
||||||
raise LaTeXFormatError("could not identify markup: %s%s"
|
|
||||||
% (`line[:100]`, extra))
|
|
||||||
while stack and stack[-1] in autoclosing:
|
|
||||||
ofp.write("-\\n\n")
|
|
||||||
ofp.write(")%s\n" % stack[-1])
|
|
||||||
popping(stack[-1], "e", len(stack) + depth - 1)
|
|
||||||
del stack[-1]
|
|
||||||
if stack:
|
|
||||||
raise LaTeXFormatError("elements remain on stack: "
|
|
||||||
+ string.join(stack))
|
|
||||||
# otherwise we just ran out of input here...
|
|
||||||
|
|
||||||
|
|
||||||
def convert(ifp, ofp, table={}, discards=(), autoclosing=()):
|
def convert(ifp, ofp, table={}, discards=(), autoclosing=()):
|
||||||
lines = string.split(ifp.read(), "\n")
|
c = Conversion(ifp, ofp, table, discards, autoclosing)
|
||||||
for i in range(len(lines)):
|
|
||||||
lines[i] = string.rstrip(lines[i])
|
|
||||||
data = string.join(lines, "\n")
|
|
||||||
try:
|
try:
|
||||||
subconvert(data, ofp, table, discards, autoclosing)
|
c.convert()
|
||||||
except IOError, (err, msg):
|
except IOError, (err, msg):
|
||||||
if err != errno.EPIPE:
|
if err != errno.EPIPE:
|
||||||
raise
|
raise
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue