lyx_mirror/lib/lyx2lyx/lyx_2_2.py

# -*- coding: utf-8 -*-
# This file is part of lyx2lyx
# -*- coding: utf-8 -*-
# Copyright (C) 2011 The LyX team
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

""" Convert files to the file format generated by lyx 2.2"""

import re, string
import unicodedata
import sys, os

# Uncomment only what you need to import, please.

#from parser_tools import find_token, find_end_of, find_tokens, \
#  find_token_exact, find_end_of_inset, find_end_of_layout, \
#  find_token_backwards, is_in_inset, get_value, get_quoted_value, \
#  del_token, check_token, get_option_value

from lyx2lyx_tools import add_to_preamble, put_cmd_in_ert, lyx2latex#, \
#  insert_to_preamble, latex_length, revert_flex_inset, \
#  revert_font_attrs, hex2ratio, str2bool

from parser_tools import find_token, find_token_backwards, find_re, \
     find_end_of_inset, find_end_of_layout, find_nonempty_line, \
     get_containing_layout, get_value, check_token

###############################################################################
###
### Conversion and reversion routines
###
###############################################################################

def convert_separator(document):
    """
    Convert layout separators to separator insets and add (LaTeX) paragraph
    breaks in order to mimic previous LaTeX export.
    """

    parins = ["\\begin_inset Separator parbreak", "\\end_inset", ""]
    parlay = ["\\begin_layout Standard", "\\begin_inset Separator parbreak",
              "\\end_inset", "", "\\end_layout", ""]
    sty_dict = {
        "family" : "default",
        "series" : "default",
        "shape"  : "default",
        "size"   : "default",
        "bar"    : "default",
        "color"  : "inherit"
        }

    i = 0
    while 1:
        i = find_token(document.body, "\\begin_deeper", i)
        if i == -1:
            break

        j = find_token_backwards(document.body, "\\end_layout", i-1)
        if j != -1:
            # reset any text style before inserting the inset
            lay = get_containing_layout(document.body, j-1)
            if lay != False:
                content = "\n".join(document.body[lay[1]:lay[2]])
                for val in list(sty_dict.keys()):
                    if content.find("\\%s" % val) != -1:
                        document.body[j:j] = ["\\%s %s" % (val, sty_dict[val])]
                        i = i + 1
                        j = j + 1
            document.body[j:j] = parins
            i = i + len(parins) + 1
        else:
            i = i + 1

    i = 0
    while 1:
        i = find_token(document.body, "\\align", i)
        if i == -1:
            break

        lay = get_containing_layout(document.body, i)
        if lay != False and lay[0] == "Plain Layout":
            i = i + 1
            continue

        j = find_token_backwards(document.body, "\\end_layout", i-1)
        if j != -1:
            lay = get_containing_layout(document.body, j-1)
            if lay != False and lay[0] == "Standard" \
               and find_token(document.body, "\\align", lay[1], lay[2]) == -1 \
               and find_token(document.body, "\\begin_inset VSpace", lay[1], lay[2]) == -1:
                # reset any text style before inserting the inset
                content = "\n".join(document.body[lay[1]:lay[2]])
                for val in list(sty_dict.keys()):
                    if content.find("\\%s" % val) != -1:
                        document.body[j:j] = ["\\%s %s" % (val, sty_dict[val])]
                        i = i + 1
                        j = j + 1
                document.body[j:j] = parins
                i = i + len(parins) + 1
            else:
                i = i + 1
        else:
            i = i + 1

    regexp = re.compile(r'^\\begin_layout (?:(-*)|(\s*))(Separator|EndOfSlide)(?:(-*)|(\s*))$', re.IGNORECASE)

    i = 0
    while 1:
        i = find_re(document.body, regexp, i)
        if i == -1:
            return

        j = find_end_of_layout(document.body, i)
        if j == -1:
            document.warning("Malformed LyX document: Missing `\\end_layout'.")
            return

        lay = get_containing_layout(document.body, j-1)
        if lay != False:
            lines = document.body[lay[3]:lay[2]]
        else:
            lines = []

        document.body[i:j+1] = parlay
        if len(lines) > 0:
            document.body[i+1:i+1] = lines

        i = i + len(parlay) + len(lines) + 1


def revert_separator(document):
    " Revert separator insets to layout separators "

    beamer_classes = ["beamer", "article-beamer", "scrarticle-beamer"]
    if document.textclass in beamer_classes:
        beglaysep = "\\begin_layout Separator"
    else:
        beglaysep = "\\begin_layout --Separator--"

    parsep = [beglaysep, "", "\\end_layout", ""]
    comert = ["\\begin_inset ERT", "status collapsed", "",
              "\\begin_layout Plain Layout", "%", "\\end_layout",
              "", "\\end_inset", ""]
    empert = ["\\begin_inset ERT", "status collapsed", "",
              "\\begin_layout Plain Layout", " ", "\\end_layout",
              "", "\\end_inset", ""]

    i = 0
    while 1:
        i = find_token(document.body, "\\begin_inset Separator", i)
        if i == -1:
            return

        lay = get_containing_layout(document.body, i)
        if lay == False:
            document.warning("Malformed LyX document: Can't convert separator inset at line " + str(i))
            i = i + 1
            continue

        layoutname = lay[0]
        beg = lay[1]
        end = lay[2]
        kind = get_value(document.body, "\\begin_inset Separator", i, i+1, "plain").split()[1]
        before = document.body[beg+1:i]
        something_before = len(before) > 0 and len("".join(before)) > 0
        j = find_end_of_inset(document.body, i)
        after = document.body[j+1:end]
        something_after = len(after) > 0 and len("".join(after)) > 0
        if kind == "plain":
            beg = beg + len(before) + 1
        elif something_before:
            document.body[i:i] = ["\\end_layout", ""]
            i = i + 2
            j = j + 2
            beg = i
            end = end + 2

        if kind == "plain":
            if something_after:
                document.body[beg:j+1] = empert
                i = i + len(empert)
            else:
                document.body[beg:j+1] = comert
                i = i + len(comert)
        else:
            if something_after:
                if layoutname == "Standard":
                    if not something_before:
                        document.body[beg:j+1] = parsep
                        i = i + len(parsep)
                        document.body[i:i] = ["", "\\begin_layout Standard"]
                        i = i + 2
                    else:
                        document.body[beg:j+1] = ["\\begin_layout Standard"]
                        i = i + 1
                else:
                    document.body[beg:j+1] = ["\\begin_deeper"]
                    i = i + 1
                    end = end + 1 - (j + 1 - beg)
                    if not something_before:
                        document.body[i:i] = parsep
                        i = i + len(parsep)
                        end = end + len(parsep)
                    document.body[i:i] = ["\\begin_layout Standard"]
                    document.body[end+2:end+2] = ["", "\\end_deeper", ""]
                    i = i + 4
            else:
                next_par_is_aligned = False
                k = find_nonempty_line(document.body, end+1)
                if k != -1 and check_token(document.body[k], "\\begin_layout"):
                    lay = get_containing_layout(document.body, k)
                    next_par_is_aligned = lay != False and \
                            find_token(document.body, "\\align", lay[1], lay[2]) != -1
                if k != -1 and not next_par_is_aligned \
                        and not check_token(document.body[k], "\\end_deeper") \
                        and not check_token(document.body[k], "\\begin_deeper"):
                    if layoutname == "Standard":
                        document.body[beg:j+1] = [beglaysep]
                        i = i + 1
                    else:
                        document.body[beg:j+1] = ["\\begin_deeper", beglaysep]
                        end = end + 2 - (j + 1 - beg)
                        document.body[end+1:end+1] = ["", "\\end_deeper", ""]
                        i = i + 3
                else:
                    if something_before:
                        del document.body[i:end+1]
                    else:
                        del document.body[i:end-1]

        i = i + 1


def revert_smash(document):
    " Set amsmath to on if smash commands are used "

    commands = ["smash[t]", "smash[b]", "notag"]
    i = find_token(document.header, "\\use_package amsmath", 0)
    if i == -1:
        document.warning("Malformed LyX document: Can't find \\use_package amsmath.")
        return;
    value = get_value(document.header, "\\use_package amsmath", i).split()[1]
    if value != "1":
        # nothing to do if package is not auto but on or off
        return;
    j = 0
    while True:
        j = find_token(document.body, '\\begin_inset Formula', j)
        if j == -1:
            return
        k = find_end_of_inset(document.body, j)
        if k == -1:
            document.warning("Malformed LyX document: Can't find end of Formula inset at line " + str(j))
            j += 1
            continue
        code = "\n".join(document.body[j:k])
        for c in commands:
            if code.find("\\%s" % c) != -1:
                # set amsmath to on, since it is loaded by the newer format
                document.header[i] = "\\use_package amsmath 2"
                return
        j = k


def revert_swissgerman(document):
    " Set language german-ch-old to german "
    i = 0
    if document.language == "german-ch-old":
        document.language = "german"
        i = find_token(document.header, "\\language", 0)
        if i != -1:
            document.header[i] = "\\language german"
    j = 0
    while True:
        j = find_token(document.body, "\\lang german-ch-old", j)
        if j == -1:
            return
        document.body[j] = document.body[j].replace("\\lang german-ch-old", "\\lang german")
        j = j + 1


def revert_use_package(document, pkg, commands, oldauto):
    # oldauto defines how the version we are reverting to behaves:
    # if it is true, the old version uses the package automatically.
    # if it is false, the old version never uses the package.
    regexp = re.compile(r'(\\use_package\s+%s)' % pkg)
    i = find_re(document.header, regexp, 0)
    value = "1" # default is auto
    if i != -1:
        value = get_value(document.header, "\\use_package" , i).split()[1]
        del document.header[i]
    if value == "2": # on
        add_to_preamble(document, ["\\usepackage{" + pkg + "}"])
    elif value == "1" and not oldauto: # auto
        i = 0
        while True:
            i = find_token(document.body, '\\begin_inset Formula', i)
            if i == -1:
                return
            j = find_end_of_inset(document.body, i)
            if j == -1:
                document.warning("Malformed LyX document: Can't find end of Formula inset at line " + str(i))
                i += 1
                continue
            code = "\n".join(document.body[i:j])
            for c in commands:
                if code.find("\\%s" % c) != -1:
                    add_to_preamble(document, ["\\usepackage{" + pkg + "}"])
                    return
            i = j


mathtools_commands = ["xhookrightarrow", "xhookleftarrow", "xRightarrow", \
                "xrightharpoondown", "xrightharpoonup", "xrightleftharpoons", \
                "xLeftarrow", "xleftharpoondown", "xleftharpoonup", \
                "xleftrightarrow", "xLeftrightarrow", "xleftrightharpoons", \
                "xmapsto"]

def revert_xarrow(document):
    "remove use_package mathtools"
    revert_use_package(document, "mathtools", mathtools_commands, False)


def revert_beamer_lemma(document):
    " Reverts beamer lemma layout to ERT "

    beamer_classes = ["beamer", "article-beamer", "scrarticle-beamer"]
    if document.textclass not in beamer_classes:
        return

    consecutive = False
    i = 0
    while True:
        i = find_token(document.body, "\\begin_layout Lemma", i)
        if i == -1:
            return
        j = find_end_of_layout(document.body, i)
        if j == -1:
            document.warning("Malformed LyX document: Can't find end of Lemma layout")
            i += 1
            continue
        arg1 = find_token(document.body, "\\begin_inset Argument 1", i, j)
        endarg1 = find_end_of_inset(document.body, arg1)
        arg2 = find_token(document.body, "\\begin_inset Argument 2", i, j)
        endarg2 = find_end_of_inset(document.body, arg2)
        subst1 = []
        subst2 = []
        if arg1 != -1:
            beginPlain1 = find_token(document.body, "\\begin_layout Plain Layout", arg1, endarg1)
            if beginPlain1 == -1:
                document.warning("Malformed LyX document: Can't find arg1 plain Layout")
                i += 1
                continue
            endPlain1 = find_end_of_inset(document.body, beginPlain1)
            content1 = document.body[beginPlain1 + 1 : endPlain1 - 2]
            subst1 = put_cmd_in_ert("<") + content1 + put_cmd_in_ert(">")
        if arg2 != -1:
            beginPlain2 = find_token(document.body, "\\begin_layout Plain Layout", arg2, endarg2)
            if beginPlain2 == -1:
                document.warning("Malformed LyX document: Can't find arg2 plain Layout")
                i += 1
                continue
            endPlain2 = find_end_of_inset(document.body, beginPlain2)
            content2 = document.body[beginPlain2 + 1 : endPlain2 - 2]
            subst2 = put_cmd_in_ert("[") + content2 + put_cmd_in_ert("]")

        # remove Arg insets
        if arg1 < arg2:
            del document.body[arg2 : endarg2 + 1]
            if arg1 != -1:
                del document.body[arg1 : endarg1 + 1]
        if arg2 < arg1:
            del document.body[arg1 : endarg1 + 1]
            if arg2 != -1:
                del document.body[arg2 : endarg2 + 1]

        # index of end layout has probably changed
        j = find_end_of_layout(document.body, i)
        if j == -1:
            document.warning("Malformed LyX document: Can't find end of Lemma layout")
            i += 1
            continue

        begcmd = []

        # if this is not a consecutive env, add start command
        if not consecutive:
            begcmd = put_cmd_in_ert("\\begin{lemma}")

        # has this a consecutive lemma?
        consecutive = document.body[j + 2] == "\\begin_layout Lemma"

        # if this is not followed by a consecutive env, add end command
        if not consecutive:
            document.body[j : j + 1] = put_cmd_in_ert("\\end{lemma}") + ["\\end_layout"]

        document.body[i : i + 1] = ["\\begin_layout Standard", ""] + begcmd + subst1 + subst2

        i = j



def revert_question_env(document):
    """
    Reverts question and question* environments of
    theorems-ams-extended-bytype module to ERT
    """

    # Do we use theorems-ams-extended-bytype module?
    have_mod = False
    mods = document.get_module_list()
    for mod in mods:
        if mod == "theorems-ams-extended-bytype":
            have_mod = True
            continue

    if not have_mod:
        return

    consecutive = False
    i = 0
    while True:
        i = find_token(document.body, "\\begin_layout Question", i)
        if i == -1:
            return

        starred = document.body[i] == "\\begin_layout Question*"

        j = find_end_of_layout(document.body, i)
        if j == -1:
            document.warning("Malformed LyX document: Can't find end of Question layout")
            i += 1
            continue

        # if this is not a consecutive env, add start command
        begcmd = []
        if not consecutive:
            if starred:
                begcmd = put_cmd_in_ert("\\begin{question*}")
            else:
                begcmd = put_cmd_in_ert("\\begin{question}")

        # has this a consecutive theorem of same type?
        consecutive = False
        if starred:
            consecutive = document.body[j + 2] == "\\begin_layout Question*"
        else:
            consecutive = document.body[j + 2] == "\\begin_layout Question"

        # if this is not followed by a consecutive env, add end command
        if not consecutive:
            if starred:
                document.body[j : j + 1] = put_cmd_in_ert("\\end{question*}") + ["\\end_layout"]
            else:
                document.body[j : j + 1] = put_cmd_in_ert("\\end{question}") + ["\\end_layout"]

        document.body[i : i + 1] = ["\\begin_layout Standard", ""] + begcmd

        add_to_preamble(document, "\\providecommand{\questionname}{Question}")

        if starred:
            add_to_preamble(document, "\\theoremstyle{plain}\n" \
                                      "\\newtheorem*{question*}{\\protect\\questionname}")
        else:
            add_to_preamble(document, "\\theoremstyle{plain}\n" \
                                      "\\newtheorem{question}{\\protect\\questionname}")

        i = j


def convert_dashes(document):
    "convert -- and --- to \\twohyphens and \\threehyphens"

    if document.backend != "latex":
        return

    i = 0
    while i < len(document.body):
        words = document.body[i].split()
        if len(words) > 1 and words[0] == "\\begin_inset" and \
           words[1] in ["CommandInset", "ERT", "External", "Formula", "Graphics", "IPA", "listings"]:
            # must not replace anything in insets that store LaTeX contents in .lyx files
            # (math and command insets withut overridden read() and write() methods
            # filtering out IPA makes Text::readParToken() more simple
            # skip ERT as well since it is not needed there
            j = find_end_of_inset(document.body, i)
            if j == -1:
                document.warning("Malformed LyX document: Can't find end of " + words[1] + " inset at line " + str(i))
                i += 1
            else:
                i = j
            continue
        while True:
            j = document.body[i].find("--")
            if j == -1:
                break
            front = document.body[i][:j]
            back = document.body[i][j+2:]
            # We can have an arbitrary number of consecutive hyphens.
            # These must be split into the corresponding number of two and three hyphens
            # We must match what LaTeX does: First try emdash, then endash, then single hyphen
            if back.find("-") == 0:
                back = back[1:]
                if len(back) > 0:
                    document.body.insert(i+1, back)
                document.body[i] = front + "\\threehyphens"
            else:
                if len(back) > 0:
                    document.body.insert(i+1, back)
                document.body[i] = front + "\\twohyphens"
        i += 1


def revert_dashes(document):
    "convert \\twohyphens and \\threehyphens to -- and ---"

    i = 0
    while i < len(document.body):
        words = document.body[i].split()
        if len(words) > 1 and words[0] == "\\begin_inset" and \
           words[1] in ["CommandInset", "ERT", "External", "Formula", "Graphics", "IPA", "listings"]:
            # see convert_dashes
            j = find_end_of_inset(document.body, i)
            if j == -1:
                document.warning("Malformed LyX document: Can't find end of " + words[1] + " inset at line " + str(i))
                i += 1
            else:
                i = j
            continue
        replaced = False
        if document.body[i].find("\\twohyphens") >= 0:
            document.body[i] = document.body[i].replace("\\twohyphens", "--")
            replaced = True
        if document.body[i].find("\\threehyphens") >= 0:
            document.body[i] = document.body[i].replace("\\threehyphens", "---")
            replaced = True
        if replaced and i+1 < len(document.body) and \
           (document.body[i+1].find("\\") != 0 or \
            document.body[i+1].find("\\twohyphens") == 0 or
            document.body[i+1].find("\\threehyphens") == 0) and \
           len(document.body[i]) + len(document.body[i+1]) <= 80:
            document.body[i] = document.body[i] + document.body[i+1]
            document.body[i+1:i+2] = []
        else:
            i += 1


# order is important for the last three!
phrases = ["LyX", "LaTeX2e", "LaTeX", "TeX"]

def is_part_of_converted_phrase(line, j, phrase):
    "is phrase part of an already converted phrase?"
    for p in phrases:
        converted = "\\SpecialCharNoPassThru \\" + p
        pos = j + len(phrase) - len(converted)
        if pos >= 0:
            if line[pos:pos+len(converted)] == converted:
                return True
    return False


def convert_phrases(document):
    "convert special phrases from plain text to \\SpecialCharNoPassThru"

    if document.backend != "latex":
        return

    for phrase in phrases:
        i = 0
        while i < len(document.body):
            words = document.body[i].split()
            if len(words) > 1 and words[0] == "\\begin_inset" and \
               words[1] in ["CommandInset", "External", "Formula", "Graphics", "listings"]:
                # must not replace anything in insets that store LaTeX contents in .lyx files
                # (math and command insets withut overridden read() and write() methods
                j = find_end_of_inset(document.body, i)
                if j == -1:
                    document.warning("Malformed LyX document: Can't find end of Formula inset at line " + str(i))
                    i += 1
                else:
                    i = j
                continue
            if document.body[i].find("\\") == 0:
                i += 1
                continue
            j = document.body[i].find(phrase)
            if j == -1:
                i += 1
                continue
            if not is_part_of_converted_phrase(document.body[i], j, phrase):
                front = document.body[i][:j]
                back = document.body[i][j+len(phrase):]
                if len(back) > 0:
                    document.body.insert(i+1, back)
                # We cannot use SpecialChar since we do not know whether we are outside passThru
                document.body[i] = front + "\\SpecialCharNoPassThru \\" + phrase
            i += 1


def revert_phrases(document):
    "convert special phrases to plain text"

    i = 0
    while i < len(document.body):
        words = document.body[i].split()
        if len(words) > 1 and words[0] == "\\begin_inset" and \
           words[1] in ["CommandInset", "External", "Formula", "Graphics", "listings"]:
            # see convert_phrases
            j = find_end_of_inset(document.body, i)
            if j == -1:
                document.warning("Malformed LyX document: Can't find end of Formula inset at line " + str(i))
                i += 1
            else:
                i = j
            continue
        replaced = False
        for phrase in phrases:
            # we can replace SpecialChar since LyX ensures that it cannot be inserted into passThru parts
            if document.body[i].find("\\SpecialChar \\" + phrase) >= 0:
                document.body[i] = document.body[i].replace("\\SpecialChar \\" + phrase, phrase)
                replaced = True
            if document.body[i].find("\\SpecialCharNoPassThru \\" + phrase) >= 0:
                document.body[i] = document.body[i].replace("\\SpecialCharNoPassThru \\" + phrase, phrase)
                replaced = True
        if replaced and i+1 < len(document.body) and \
           (document.body[i+1].find("\\") != 0 or \
            document.body[i+1].find("\\SpecialChar") == 0) and \
           len(document.body[i]) + len(document.body[i+1]) <= 80:
            document.body[i] = document.body[i] + document.body[i+1]
            document.body[i+1:i+2] = []
            i -= 1
        i += 1


def convert_specialchar_internal(document, forward):
    specialchars = {"\\-":"softhyphen", "\\textcompwordmark{}":"ligaturebreak", \
        "\\@.":"endofsentence", "\\ldots{}":"ldots", \
        "\\menuseparator":"menuseparator", "\\slash{}":"breakableslash", \
        "\\nobreakdash-":"nobreakdash", "\\LyX":"LyX", \
        "\\TeX":"TeX", "\\LaTeX2e":"LaTeX2e", \
        "\\LaTeX":"LaTeX" # must be after LaTeX2e
    }

    i = 0
    while i < len(document.body):
        words = document.body[i].split()
        if len(words) > 1 and words[0] == "\\begin_inset" and \
           words[1] in ["CommandInset", "External", "Formula", "Graphics", "listings"]:
            # see convert_phrases
            j = find_end_of_inset(document.body, i)
            if j == -1:
                document.warning("Malformed LyX document: Can't find end of Formula inset at line " + str(i))
                i += 1
            else:
                i = j
            continue
        for key, value in specialchars.iteritems():
            if forward:
                document.body[i] = document.body[i].replace("\\SpecialChar " + key, "\\SpecialChar " + value)
                document.body[i] = document.body[i].replace("\\SpecialCharNoPassThru " + key, "\\SpecialCharNoPassThru " + value)
            else:
                document.body[i] = document.body[i].replace("\\SpecialChar " + value, "\\SpecialChar " + key)
                document.body[i] = document.body[i].replace("\\SpecialCharNoPassThru " + value, "\\SpecialCharNoPassThru " + key)
        i += 1


def convert_specialchar(document):
    "convert special characters to new syntax"
    convert_specialchar_internal(document, True)


def revert_specialchar(document):
    "convert special characters to old syntax"
    convert_specialchar_internal(document, False)


def revert_georgian(document):
    "Set the document language to English but assure Georgian output"

    if document.language == "georgian":
        document.language = "english"
        i = find_token(document.header, "\\language georgian", 0)
        if i != -1:
    	    document.header[i] = "\\language english"
        j = find_token(document.header, "\\language_package default", 0)
        if j != -1:
    	    document.header[j] = "\\language_package babel"
        k = find_token(document.header, "\\options", 0)
        if k != -1:
    	    document.header[k] = document.header[k].replace("\\options", "\\options georgian,")
        else:
    	    l = find_token(document.header, "\\use_default_options", 0)
    	    document.header.insert(l + 1, "\\options georgian")


def revert_sigplan_doi(document):
    " Reverts sigplanconf DOI layout to ERT "

    if document.textclass != "sigplanconf":
        return

    i = 0
    while True:
        i = find_token(document.body, "\\begin_layout DOI", i)
        if i == -1:
            return
        j = find_end_of_layout(document.body, i)
        if j == -1:
            document.warning("Malformed LyX document: Can't find end of DOI layout")
            i += 1
            continue

        content = lyx2latex(document, document.body[i:j + 1])
        add_to_preamble(document, ["\\doi{" + content + "}"])
        del document.body[i:j + 1]
        # no need to reset i


def revert_ex_itemargs(document):
    " Reverts \\item arguments of the example environments (Linguistics module) to TeX-code "

    # Do we use the linguistics module?
    have_mod = False
    mods = document.get_module_list()
    for mod in mods:
        if mod == "linguistics":
            have_mod = True
            continue

    if not have_mod:
        return

    i = 0
    example_layouts = ["Numbered Examples (consecutive)", "Subexample"]
    while True:
        i = find_token(document.body, "\\begin_inset Argument item:", i)
        if i == -1:
            return
        j = find_end_of_inset(document.body, i)
        # Find containing paragraph layout
        parent = get_containing_layout(document.body, i)
        if parent == False:
            document.warning("Malformed LyX document: Can't find parent paragraph layout")
            i += 1
            continue
        parbeg = parent[3]
        layoutname = parent[0]
        if layoutname in example_layouts:
            beginPlain = find_token(document.body, "\\begin_layout Plain Layout", i)
            endPlain = find_end_of_layout(document.body, beginPlain)
            content = document.body[beginPlain + 1 : endPlain]
            del document.body[i:j+1]
            subst = put_cmd_in_ert("[") + content + put_cmd_in_ert("]")
            document.body[parbeg : parbeg] = subst
        i += 1


def revert_forest(document):
    " Reverts the forest environment (Linguistics module) to TeX-code "

    # Do we use the linguistics module?
    have_mod = False
    mods = document.get_module_list()
    for mod in mods:
        if mod == "linguistics":
            have_mod = True
            continue

    if not have_mod:
        return

    i = 0
    while True:
        i = find_token(document.body, "\\begin_inset Flex Structure Tree", i)
        if i == -1:
            return
        j = find_end_of_inset(document.body, i)
        if j == -1:
            document.warning("Malformed LyX document: Can't find end of Structure Tree inset")
            i += 1
            continue

        beginPlain = find_token(document.body, "\\begin_layout Plain Layout", i)
        endPlain = find_end_of_layout(document.body, beginPlain)
        content = lyx2latex(document, document.body[beginPlain : endPlain])

        add_to_preamble(document, ["\\usepackage{forest}"])

        document.body[i:j + 1] = ["\\begin_inset ERT", "status collapsed", "",
                "\\begin_layout Plain Layout", "", "\\backslash", 
                "begin{forest}", "\\end_layout", "", "\\begin_layout Plain Layout",
                content, "\\end_layout", "", "\\begin_layout Plain Layout",
                "\\backslash", "end{forest}", "", "\\end_layout", "", "\\end_inset"]
        # no need to reset i


def revert_glossgroup(document):
    " Reverts the GroupGlossedWords inset (Linguistics module) to TeX-code "

    # Do we use the linguistics module?
    have_mod = False
    mods = document.get_module_list()
    for mod in mods:
        if mod == "linguistics":
            have_mod = True
            continue

    if not have_mod:
        return

    i = 0
    while True:
        i = find_token(document.body, "\\begin_inset Flex GroupGlossedWords", i)
        if i == -1:
            return
        j = find_end_of_inset(document.body, i)
        if j == -1:
            document.warning("Malformed LyX document: Can't find end of GroupGlossedWords inset")
            i += 1
            continue

        beginPlain = find_token(document.body, "\\begin_layout Plain Layout", i)
        endPlain = find_end_of_layout(document.body, beginPlain)
        content = lyx2latex(document, document.body[beginPlain : endPlain])
        document.warning("content: %s" % content)

        document.body[i:j + 1] = ["{", "", content, "", "}"]
        # no need to reset i


def revert_newgloss(document):
    " Reverts the new Glosse insets (Linguistics module) to the old format "

    # Do we use the linguistics module?
    have_mod = False
    mods = document.get_module_list()
    for mod in mods:
        if mod == "linguistics":
            have_mod = True
            continue

    if not have_mod:
        return

    glosses = ("\\begin_inset Flex Glosse", "\\begin_inset Flex Tri-Glosse")
    for glosse in glosses:
        i = 0
        while True:
            i = find_token(document.body, glosse, i)
            if i == -1:
                break
            j = find_end_of_inset(document.body, i)
            if j == -1:
                document.warning("Malformed LyX document: Can't find end of Glosse inset")
                i += 1
                continue

            arg = find_token(document.body, "\\begin_inset Argument 1", i, j)
            endarg = find_end_of_inset(document.body, arg)
            argcontent = ""
            if arg != -1:
                argbeginPlain = find_token(document.body, "\\begin_layout Plain Layout", arg, endarg)
                if argbeginPlain == -1:
                    document.warning("Malformed LyX document: Can't find arg plain Layout")
                    i += 1
                    continue
                argendPlain = find_end_of_inset(document.body, argbeginPlain)
                argcontent = lyx2latex(document, document.body[argbeginPlain : argendPlain - 2])

                document.body[j:j] = ["", "\\begin_layout Plain Layout","\\backslash", "glt ",
                    argcontent, "\\end_layout"]

                # remove Arg insets and paragraph, if it only contains this inset
                if document.body[arg - 1] == "\\begin_layout Plain Layout" and find_end_of_layout(document.body, arg - 1) == endarg + 3:
                    del document.body[arg - 1 : endarg + 4]
                else:
                    del document.body[arg : endarg + 1]

            beginPlain = find_token(document.body, "\\begin_layout Plain Layout", i)
            endPlain = find_end_of_layout(document.body, beginPlain)
            content = lyx2latex(document, document.body[beginPlain : endPlain])

            document.body[beginPlain + 1:endPlain] = [content]
            i = beginPlain + 1


def convert_newgloss(document):
    " Converts Glosse insets (Linguistics module) to the new format "

    # Do we use the linguistics module?
    have_mod = False
    mods = document.get_module_list()
    for mod in mods:
        if mod == "linguistics":
            have_mod = True
            continue

    if not have_mod:
        return

    glosses = ("\\begin_inset Flex Glosse", "\\begin_inset Flex Tri-Glosse")
    for glosse in glosses:
        i = 0
        while True:
            i = find_token(document.body, glosse, i)
            if i == -1:
                break
            j = find_end_of_inset(document.body, i)
            if j == -1:
                document.warning("Malformed LyX document: Can't find end of Glosse inset")
                i += 1
                continue

            k = i
            while True:
                argcontent = []
                beginPlain = find_token(document.body, "\\begin_layout Plain Layout", k, j)
                if beginPlain == -1:
                    break
                endPlain = find_end_of_layout(document.body, beginPlain)
                if endPlain == -1:
                    document.warning("Malformed LyX document: Can't find end of Glosse layout")
                    i += 1
                    continue

                glt  = find_token(document.body, "\\backslash", beginPlain, endPlain)
                if glt != -1 and document.body[glt + 1].startswith("glt"):
                    document.body[glt + 1] = document.body[glt + 1].lstrip("glt").lstrip()
                    argcontent = document.body[glt + 1 : endPlain]
                    document.body[beginPlain + 1 : endPlain] = ["\\begin_inset Argument 1", "status open", "",
                        "\\begin_layout Plain Layout", "\\begin_inset ERT", "status open", "",
                        "\\begin_layout Plain Layout", ""] + argcontent + ["\\end_layout", "", "\\end_inset", "",
                        "\\end_layout", "", "\\end_inset"]
                else:
                    content = document.body[beginPlain + 1 : endPlain]
                    document.body[beginPlain + 1 : endPlain] = ["\\begin_inset ERT", "status open", "",
                        "\\begin_layout Plain Layout"] + content + ["\\end_layout", "", "\\end_inset"]

                endPlain = find_end_of_layout(document.body, beginPlain)
                k = endPlain
                j = find_end_of_inset(document.body, i)

            i = endPlain + 1


def convert_BoxFeatures(document):
    " adds new box features "

    i = 0
    while True:
        i = find_token(document.body, "height_special", i)
        if i == -1:
            return
        document.body[i+1:i+1] = ['thickness "0.4pt"', 'separation "3pt"', 'shadowsize "4pt"']
        i = i + 4


def revert_BoxFeatures(document):
    " outputs new box features as TeX code "

    i = 0
    defaultSep = "3pt"
    defaultThick = "0.4pt"
    defaultShadow = "4pt"
    while True:
        i = find_token(document.body, "height_special", i)
        if i == -1:
            return
        # read out the values
        beg = document.body[i+1].find('"');
        end = document.body[i+1].rfind('"');
        thickness = document.body[i+1][beg+1:end];
        beg = document.body[i+2].find('"');
        end = document.body[i+2].rfind('"');
        separation = document.body[i+2][beg+1:end];
        beg = document.body[i+3].find('"');
        end = document.body[i+3].rfind('"');
        shadowsize = document.body[i+3][beg+1:end];
        # delete the specification
        del document.body[i+1:i+4]
        # output ERT
        # first output the closing brace
        if shadowsize != defaultShadow or separation != defaultSep or thickness != defaultThick:
            document.body[i + 10 : i + 10] = put_cmd_in_ert("}")
        # now output the lengths
        if shadowsize != defaultShadow or separation != defaultSep or thickness != defaultThick:
            document.body[i - 10 : i - 10] = put_cmd_in_ert("{")
        if thickness != defaultThick:
            document.body[i - 5 : i - 4] = ["{\\backslash fboxrule " + thickness]
        if separation != defaultSep and thickness == defaultThick:
            document.body[i - 5 : i - 4] = ["{\\backslash fboxsep " + separation]
        if separation != defaultSep and thickness != defaultThick:
            document.body[i - 5 : i - 4] = ["{\\backslash fboxrule " + thickness + "\\backslash fboxsep " + separation]
        if shadowsize != defaultShadow and separation == defaultSep and thickness == defaultThick:
            document.body[i - 5 : i - 4] = ["{\\backslash shadowsize " + shadowsize]
        if shadowsize != defaultShadow and separation != defaultSep and thickness == defaultThick:
            document.body[i - 5 : i - 4] = ["{\\backslash fboxsep " + separation + "\\backslash shadowsize " + shadowsize]
        if shadowsize != defaultShadow and separation == defaultSep and thickness != defaultThick:
            document.body[i - 5 : i - 4] = ["{\\backslash fboxrule " + thickness + "\\backslash shadowsize " + shadowsize]
        if shadowsize != defaultShadow and separation != defaultSep and thickness != defaultThick:
            document.body[i - 5 : i - 4] = ["{\\backslash fboxrule " + thickness + "\\backslash fboxsep " + separation + "\\backslash shadowsize " + shadowsize]
        i = i + 11


def convert_origin(document):
    " Insert the origin tag "

    i = find_token(document.header, "\\textclass ", 0)
    if i == -1:
        document.warning("Malformed LyX document: No \\textclass!!")
        return;
    if document.dir == "":
        origin = "stdin"
    else:
        origin = document.dir.replace('\\', '/') + '/'
        if os.name != 'nt':
            origin = unicode(origin, sys.getfilesystemencoding())
    document.header[i:i] = ["\\origin " + origin]


def revert_origin(document):
    " Remove the origin tag "

    i = find_token(document.header, "\\origin ", 0)
    if i == -1:
        document.warning("Malformed LyX document: No \\origin!!")
        return;
    del document.header[i]


color_names = ["brown", "darkgray", "gray", \
               "lightgray", "lime", "olive", "orange", \
               "pink", "purple", "teal", "violet"]

def revert_textcolor(document):
    " revert new \texcolor colors to TeX code "

    i = 0
    j = 0
    xcolor = False
    add_to_preamble(document, ["\\@ifundefined{rangeHsb}{\\usepackage{xcolor}}"])
    while True:
        i = find_token(document.body, "\\color ", i)
        if i == -1:
            return
        else:
            for color in list(color_names):
                if document.body[i] == "\\color " + color:
                    # register that xcolor must be loaded in the preamble
                    if xcolor == False:
                        xcolor = True
                        add_to_preamble(document, ["\\@ifundefined{rangeHsb}{\usepackage{xcolor}}"])
                    # find the next \\color and/or the next \\end_layout
                    j = find_token(document.body, "\\color", i + 1)
                    k = find_token(document.body, "\\end_layout", i + 1)
                    if j == -1 and k != -1:
                        j = k +1 
                    # output TeX code
                    # first output the closing brace
                    if k < j:
                        document.body[k: k] = put_cmd_in_ert("}")
                    else:
                        document.body[j: j] = put_cmd_in_ert("}")
                    # now output the \textcolor command
                    document.body[i : i + 1] = put_cmd_in_ert("\\textcolor{" + color + "}{")
        i = i + 1


def convert_colorbox(document):
    " adds color settings for boxes "

    i = 0
    while True:
        i = find_token(document.body, "shadowsize", i)
        if i == -1:
            return
        document.body[i+1:i+1] = ['framecolor "black"', 'backgroundcolor "none"']
        i = i + 3


def revert_colorbox(document):
    " outputs color settings for boxes as TeX code "

    i = 0
    defaultframecolor = "black"
    defaultbackcolor = "white"
    while True:
        i = find_token(document.body, "framecolor", i)
        if i == -1:
            return
        # read out the values
        beg = document.body[i].find('"');
        end = document.body[i].rfind('"');
        framecolor = document.body[i][beg+1:end];
        beg = document.body[i+1].find('"');
        end = document.body[i+1].rfind('"');
        backcolor = document.body[i+1][beg+1:end];
        # delete the specification
        del document.body[i:i+2]
        # output TeX code
        # first output the closing brace
        if framecolor != defaultframecolor or backcolor != defaultbackcolor:
            document.body[i + 9 : i + 9] = put_cmd_in_ert("}")
        # now output the box commands
        if framecolor != defaultframecolor or backcolor != defaultbackcolor:
            document.body[i - 14 : i - 14] = put_cmd_in_ert("{")
        if framecolor != defaultframecolor:
            document.body[i - 9 : i - 8] = ["\\backslash fboxcolor{" + framecolor + "}{" + backcolor + "}{"]
        if backcolor != defaultbackcolor and framecolor == defaultframecolor:
            document.body[i - 9 : i - 8] = ["\\backslash colorbox{" + backcolor + "}{"]
        i = i + 11


def revert_mathmulticol(document):
    " Convert formulas to ERT if they contain multicolumns "

    i = 0
    while True:
        i = find_token(document.body, '\\begin_inset Formula', i)
        if i == -1:
            return
        j = find_end_of_inset(document.body, i)
        if j == -1:
            document.warning("Malformed LyX document: Can't find end of Formula inset at line " + str(i))
            i += 1
            continue
        lines = document.body[i:j]
        lines[0] = lines[0].replace('\\begin_inset Formula', '').lstrip()
        code = "\n".join(lines)
        converted = False
        k = 0
        n = 0
        while n >= 0:
            n = code.find("\\multicolumn", k)
            # no need to convert degenerated multicolumn cells,
            # they work in old LyX versions as "math ERT"
            if n != -1 and code.find("\\multicolumn{1}", k) != n:
                ert = put_cmd_in_ert(code)
                document.body[i:j+1] = ert
                converted = True
                break
            else:
                k = n + 12
        if converted:
            i = find_end_of_inset(document.body, i)
        else:
            i = j


def revert_Argument_to_TeX_brace(document, line, endline, n, nmax, environment, opt):
    '''
    Reverts an InsetArgument to TeX-code
    usage:
    revert_Argument_to_TeX_brace(document, LineOfBegin, LineOfEnd, StartArgument, EndArgument, isEnvironment, isOpt)
    LineOfBegin is the line  of the \begin_layout or \begin_inset statement
    LineOfEnd is the line  of the \end_layout or \end_inset statement, if "0" is given, the end of the file is used instead
    StartArgument is the number of the first argument that needs to be converted
    EndArgument is the number of the last argument that needs to be converted or the last defined one
    isEnvironment must be true, if the layout is for a LaTeX environment
    isOpt must be true, if the argument is an optional one
    '''
    lineArg = 0
    wasOpt = False
    while lineArg != -1 and n < nmax + 1:
      lineArg = find_token(document.body, "\\begin_inset Argument " + str(n), line)
      if lineArg > endline and endline != 0:
        return wasOpt
      if lineArg != -1:
        beginPlain = find_token(document.body, "\\begin_layout Plain Layout", lineArg)
        # we have to assure that no other inset is in the Argument
        beginInset = find_token(document.body, "\\begin_inset", beginPlain)
        endInset = find_token(document.body, "\\end_inset", beginPlain)
        k = beginPlain + 1
        l = k
        while beginInset < endInset and beginInset != -1:
          beginInset = find_token(document.body, "\\begin_inset", k)
          endInset = find_token(document.body, "\\end_inset", l)
          k = beginInset + 1
          l = endInset + 1
        if environment == False:
          if opt == False:
            document.body[endInset - 2 : endInset + 1] = put_cmd_in_ert("}{")
            del(document.body[lineArg : beginPlain + 1])
            wasOpt = False
          else:
            document.body[endInset - 2 : endInset + 1] = put_cmd_in_ert("]")
            document.body[lineArg : beginPlain + 1] = put_cmd_in_ert("[")
            wasOpt = True
        else:
          document.body[endInset - 2 : endInset + 1] = put_cmd_in_ert("}")
          document.body[lineArg : beginPlain + 1] = put_cmd_in_ert("{")
          wasOpt = False
        n += 1
    return wasOpt


def revert_jss(document):
    " Reverts JSS In_Preamble commands to ERT in preamble "

    if document.textclass != "jss":
        return

    h = 0
    m = 0
    j = 0
    k = 0
    n = 0
    while True:
      # at first revert the inset layouts because they can be part of the In_Preamble layouts
      while m != -1 or j != -1 or h != -1 or k != -1 or n != -1:
        # \pkg
        if h != -1:
          h = find_token(document.body, "\\begin_inset Flex Pkg", h)
        if h != -1:
          endh = find_end_of_inset(document.body, h)
          document.body[endh - 2 : endh + 1] = put_cmd_in_ert("}")
          document.body[h : h + 4] = put_cmd_in_ert("\\pkg{")
          h = h + 5
        # \proglang
        if m != -1:
          m = find_token(document.body, "\\begin_inset Flex Proglang", m)
        if m != -1:
          endm = find_end_of_inset(document.body, m)
          document.body[endm - 2 : endm + 1] = put_cmd_in_ert("}")
          document.body[m : m + 4] = put_cmd_in_ert("\\proglang{")
          m = m + 5
        # \code
        if j != -1:
          j = find_token(document.body, "\\begin_inset Flex Code", j)
        if j != -1:
          # assure that we are not in a Code Chunk inset
          if document.body[j][-1] == "e":
              endj = find_end_of_inset(document.body, j)
              document.body[endj - 2 : endj + 1] = put_cmd_in_ert("}")
              document.body[j : j + 4] = put_cmd_in_ert("\\code{")
              j = j + 5
          else:
              j = j + 1
        # \email
        if k != -1:
          k = find_token(document.body, "\\begin_inset Flex E-mail", k)
        if k != -1:
          endk = find_end_of_inset(document.body, k)
          document.body[endk - 2 : endk + 1] = put_cmd_in_ert("}")
          document.body[k : k + 4] = put_cmd_in_ert("\\email{")
          k = k + 5
        # \url
        if n != -1:
          n = find_token(document.body, "\\begin_inset Flex URL", n)
        if n != -1:
          endn = find_end_of_inset(document.body, n)
          document.body[endn - 2 : endn + 1] = put_cmd_in_ert("}")
          document.body[n : n + 4] = put_cmd_in_ert("\\url{")
          n = n + 5
      # now revert the In_Preamble layouts
      # \title
      i = find_token(document.body, "\\begin_layout Title", 0)
      if i == -1:
        return
      j = find_end_of_layout(document.body, i)
      if j == -1:
        document.warning("Malformed LyX document: Can't find end of Title layout")
        i += 1
        continue
      content = lyx2latex(document, document.body[i:j + 1])
      add_to_preamble(document, ["\\title{" + content + "}"])
      del document.body[i:j + 1]
      # \author
      i = find_token(document.body, "\\begin_layout Author", 0)
      if i == -1:
        return
      j = find_end_of_layout(document.body, i)
      if j == -1:
        document.warning("Malformed LyX document: Can't find end of Author layout")
        i += 1
        continue
      content = lyx2latex(document, document.body[i:j + 1])
      add_to_preamble(document, ["\\author{" + content + "}"])
      del document.body[i:j + 1]
      # \Plainauthor
      i = find_token(document.body, "\\begin_layout Plain Author", 0)
      if i == -1:
        return
      j = find_end_of_layout(document.body, i)
      if j == -1:
        document.warning("Malformed LyX document: Can't find end of Plain Author layout")
        i += 1
        continue
      content = lyx2latex(document, document.body[i:j + 1])
      add_to_preamble(document, ["\\Plainauthor{" + content + "}"])
      del document.body[i:j + 1]
      # \Plaintitle
      i = find_token(document.body, "\\begin_layout Plain Title", 0)
      if i == -1:
        return
      j = find_end_of_layout(document.body, i)
      if j == -1:
        document.warning("Malformed LyX document: Can't find end of Plain Title layout")
        i += 1
        continue
      content = lyx2latex(document, document.body[i:j + 1])
      add_to_preamble(document, ["\\Plaintitle{" + content + "}"])
      del document.body[i:j + 1]
      # \Shorttitle
      i = find_token(document.body, "\\begin_layout Short Title", 0)
      if i == -1:
        return
      j = find_end_of_layout(document.body, i)
      if j == -1:
        document.warning("Malformed LyX document: Can't find end of Short Title layout")
        i += 1
        continue
      content = lyx2latex(document, document.body[i:j + 1])
      add_to_preamble(document, ["\\Shorttitle{" + content + "}"])
      del document.body[i:j + 1]
      # \Abstract
      i = find_token(document.body, "\\begin_layout Abstract", 0)
      if i == -1:
        return
      j = find_end_of_layout(document.body, i)
      if j == -1:
        document.warning("Malformed LyX document: Can't find end of Abstract layout")
        i += 1
        continue
      content = lyx2latex(document, document.body[i:j + 1])
      add_to_preamble(document, ["\\Abstract{" + content + "}"])
      del document.body[i:j + 1]
      # \Keywords
      i = find_token(document.body, "\\begin_layout Keywords", 0)
      if i == -1:
        return
      j = find_end_of_layout(document.body, i)
      if j == -1:
        document.warning("Malformed LyX document: Can't find end of Keywords layout")
        i += 1
        continue
      content = lyx2latex(document, document.body[i:j + 1])
      add_to_preamble(document, ["\\Keywords{" + content + "}"])
      del document.body[i:j + 1]
      # \Plainkeywords
      i = find_token(document.body, "\\begin_layout Plain Keywords", 0)
      if i == -1:
        return
      j = find_end_of_layout(document.body, i)
      if j == -1:
        document.warning("Malformed LyX document: Can't find end of Plain Keywords layout")
        i += 1
        continue
      content = lyx2latex(document, document.body[i:j + 1])
      add_to_preamble(document, ["\\Plainkeywords{" + content + "}"])
      del document.body[i:j + 1]
      # \Address
      i = find_token(document.body, "\\begin_layout Address", 0)
      if i == -1:
        return
      j = find_end_of_layout(document.body, i)
      if j == -1:
        document.warning("Malformed LyX document: Can't find end of Address layout")
        i += 1
        continue
      content = lyx2latex(document, document.body[i:j + 1])
      add_to_preamble(document, ["\\Address{" + content + "}"])
      del document.body[i:j + 1]
      # finally handle the code layouts
      h = 0
      m = 0
      j = 0
      k = 0
      while m != -1 or j != -1 or h != -1 or k != -1:
        # \CodeChunk
        if h != -1:
          h = find_token(document.body, "\\begin_inset Flex Code Chunk", h)
        if h != -1:
          endh = find_end_of_inset(document.body, h)
          document.body[endh + 1 : endh] = ["\\end_layout"]
          document.body[endh : endh + 1] = put_cmd_in_ert("\\end{CodeChunk}")
          document.body[h : h + 3] = put_cmd_in_ert("\\begin{CodeChunk}")
          document.body[h - 1 : h] = ["\\begin_layout Standard"]
          h = h + 1
        # \CodeInput
        if j != -1:
          j = find_token(document.body, "\\begin_layout Code Input", j)
        if j != -1:
          endj = find_end_of_layout(document.body, j)
          document.body[endj : endj + 1] = ["\\end_layout", "", "\\begin_layout Standard"]
          document.body[endj + 3 : endj + 4] = put_cmd_in_ert("\\end{CodeInput}")
          document.body[endj + 13 : endj + 13] = ["\\end_layout", "", "\\begin_layout Standard"]
          document.body[j + 1 : j] = ["\\end_layout", "", "\\begin_layout Standard"]
          document.body[j : j + 1] = put_cmd_in_ert("\\begin{CodeInput}")
          j = j + 1
        # \CodeOutput
        if k != -1:
          k = find_token(document.body, "\\begin_layout Code Output", k)
        if k != -1:
          endk = find_end_of_layout(document.body, k)
          document.body[endk : endk + 1] = ["\\end_layout", "", "\\begin_layout Standard"]
          document.body[endk + 3 : endk + 4] = put_cmd_in_ert("\\end{CodeOutput}")
          document.body[endk + 13 : endk + 13] = ["\\end_layout", "", "\\begin_layout Standard"]
          document.body[k + 1 : k] = ["\\end_layout", "", "\\begin_layout Standard"]
          document.body[k : k + 1] = put_cmd_in_ert("\\begin{CodeOutput}")
          k = k + 1
        # \Code
        if m != -1:
          m = find_token(document.body, "\\begin_layout Code", m)
        if m != -1:
          endm = find_end_of_layout(document.body, m)
          document.body[endm : endm + 1] = ["\\end_layout", "", "\\begin_layout Standard"]
          document.body[endm + 3 : endm + 4] = put_cmd_in_ert("\\end{Code}")
          document.body[endm + 13 : endm + 13] = ["\\end_layout", "", "\\begin_layout Standard"]
          document.body[m + 1 : m] = ["\\end_layout", "", "\\begin_layout Standard"]
          document.body[m : m + 1] = put_cmd_in_ert("\\begin{Code}")
          m = m + 1


def convert_subref(document):
    " converts sub: ref prefixes to subref: "

    # 1) label insets
    rx = re.compile(r'^name \"sub:(.+)$')
    i = 0
    while True:
        i = find_token(document.body, "\\begin_inset CommandInset label", i)
        if i == -1:
            break
        j = find_end_of_inset(document.body, i)
        if j == -1:
            document.warning("Malformed LyX document: Can't find end of Label inset at line " + str(i))
            i += 1
            continue

        for p in range(i, j):
            m = rx.match(document.body[p])
            if m:
                label = m.group(1)
                document.body[p] = "name \"subsec:" + label
        i += 1

    # 2) xref insets
    rx = re.compile(r'^reference \"sub:(.+)$')
    i = 0
    while True:
        i = find_token(document.body, "\\begin_inset CommandInset ref", i)
        if i == -1:
            return
        j = find_end_of_inset(document.body, i)
        if j == -1:
            document.warning("Malformed LyX document: Can't find end of Ref inset at line " + str(i))
            i += 1
            continue

        for p in range(i, j):
            m = rx.match(document.body[p])
            if m:
                label = m.group(1)
                document.body[p] = "reference \"subsec:" + label
                break
        i += 1



def revert_subref(document):
    " reverts subref: ref prefixes to sub: "

    # 1) label insets
    rx = re.compile(r'^name \"subsec:(.+)$')
    i = 0
    while True:
        i = find_token(document.body, "\\begin_inset CommandInset label", i)
        if i == -1:
            break
        j = find_end_of_inset(document.body, i)
        if j == -1:
            document.warning("Malformed LyX document: Can't find end of Label inset at line " + str(i))
            i += 1
            continue

        for p in range(i, j):
            m = rx.match(document.body[p])
            if m:
                label = m.group(1)
                document.body[p] = "name \"sub:" + label
                break
        i += 1

    # 2) xref insets
    rx = re.compile(r'^reference \"subsec:(.+)$')
    i = 0
    while True:
        i = find_token(document.body, "\\begin_inset CommandInset ref", i)
        if i == -1:
            return
        j = find_end_of_inset(document.body, i)
        if j == -1:
            document.warning("Malformed LyX document: Can't find end of Ref inset at line " + str(i))
            i += 1
            continue

        for p in range(i, j):
            m = rx.match(document.body[p])
            if m:
                label = m.group(1)
                document.body[p] = "reference \"sub:" + label
                break
        i += 1


##
# Conversion hub
#

supported_versions = ["2.2.0", "2.2"]
convert = [
           [475, [convert_separator]],
           # nothing to do for 476: We consider it a bug that older versions
           # did not load amsmath automatically for these commands, and do not
           # want to hardcode amsmath off.
           [476, []],
           [477, []],
           [478, []],
           [479, []],
           [480, []],
           [481, [convert_dashes]],
           [482, [convert_phrases]],
           [483, [convert_specialchar]],
           [484, []],
           [485, []],
           [486, []],
           [487, []],
           [488, [convert_newgloss]],
           [489, [convert_BoxFeatures]],
           [490, [convert_origin]],
           [491, []],
           [492, [convert_colorbox]],
           [493, []],
           [494, []],
           [495, [convert_subref]]
          ]

revert =  [
           [494, [revert_subref]],
           [493, [revert_jss]],
           [492, [revert_mathmulticol]],
           [491, [revert_colorbox]],
           [490, [revert_textcolor]],
           [489, [revert_origin]],
           [488, [revert_BoxFeatures]],
           [487, [revert_newgloss, revert_glossgroup]],
           [486, [revert_forest]],
           [485, [revert_ex_itemargs]],
           [484, [revert_sigplan_doi]],
           [483, [revert_georgian]],
           [482, [revert_specialchar]],
           [481, [revert_phrases]],
           [480, [revert_dashes]],
           [479, [revert_question_env]],
           [478, [revert_beamer_lemma]],
           [477, [revert_xarrow]],
           [476, [revert_swissgerman]],
           [475, [revert_smash]],
           [474, [revert_separator]]
          ]


if __name__ == "__main__":
    pass