# -*- coding: utf-8 -*-
# This file is part of lyx2lyx
# Copyright (C) 2016 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 2.3"""

import re, string
import unicodedata
import sys, os

# Uncomment only what you need to import, please.

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

from lyx2lyx_tools import add_to_preamble, put_cmd_in_ert, revert_font_attrs, \
    insert_to_preamble
#  get_ert, lyx2latex, \
#  lyx2verbatim, length_in_bp, convert_info_insets
#  latex_length, revert_flex_inset, hex2ratio, str2bool

####################################################################
# Private helper functions



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

def convert_microtype(document):
    " Add microtype settings. "
    i = find_token(document.header, "\\font_tt_scale" , 0)
    if i == -1:
        document.warning("Malformed LyX document: Can't find \\font_tt_scale.")
        i = len(document.header) - 1

    j = find_token(document.preamble, "\\usepackage{microtype}", 0)
    if j == -1:
        document.header.insert(i + 1, "\\use_microtype false")
    else:
        document.header.insert(i + 1, "\\use_microtype true")
        del document.preamble[j]


def revert_microtype(document):
    " Remove microtype settings. "
    i = find_token(document.header, "\\use_microtype", 0)
    if i == -1:
        return
    use_microtype = get_bool_value(document.header, "\\use_microtype" , i)
    del document.header[i]
    if use_microtype:
        add_to_preamble(document, ["\\usepackage{microtype}"])


def convert_dateinset(document):
    ' Convert date external inset to ERT '
    i = 0
    while True:
        i = find_token(document.body, "\\begin_inset External", i)
        if i == -1:
            return
        j = find_end_of_inset(document.body, i)
        if j == -1:
            document.warning("Malformed lyx document: Missing '\\end_inset' in convert_dateinset.")
            i += 1
            continue
        if get_value(document.body, 'template', i, j) == "Date":
            document.body[i : j + 1] = put_cmd_in_ert("\\today ")
        i += 1
        continue


def convert_inputenc(document):
    " Replace no longer supported input encoding settings. "
    i = find_token(document.header, "\\inputenc", 0)
    if i == -1:
        return
    if get_value(document.header, "\\inputencoding", i) == "pt254":
        document.header[i] = "\\inputencoding pt154"


def convert_ibranches(document):
    ' Add "inverted 0" to branch insets'
    i = 0
    while True:
        i = find_token(document.body, "\\begin_inset Branch", i)
        if i == -1:
            return
        document.body.insert(i + 1, "inverted 0")
        i += 1


def revert_ibranches(document):
    ' Convert inverted branches to explicit anti-branches'
    # Get list of branches
    ourbranches = {}
    i = 0
    while True:
        i = find_token(document.header, "\\branch", i)
        if i == -1:
            break
        branch = document.header[i][8:].strip()
        if document.header[i+1].startswith("\\selected "):
            #document.warning(document.header[i+1])
            #document.warning(document.header[i+1][10])
            selected = int(document.header[i+1][10])
        else:
            document.warning("Malformed LyX document: No selection indicator for branch " + branch)
            selected = 1

        # the value tells us whether the branch is selected
        ourbranches[document.header[i][8:].strip()] = selected
        i += 1

    # Figure out what inverted branches, if any, have been used
    # and convert them to "Anti-OldBranch"
    ibranches = {}
    i = 0
    while True:
        i = find_token(document.body, "\\begin_inset Branch", i)
        if i == -1:
            break
        if not document.body[i+1].startswith("inverted "):
            document.warning("Malformed LyX document: Missing 'inverted' tag!")
            i += 1
            continue
        inverted = document.body[i+1][9]
        #document.warning(document.body[i+1])

        if inverted == "1":
            branch = document.body[i][20:].strip()
            #document.warning(branch)
            if not branch in ibranches:
                antibranch = "Anti-" + branch
                while antibranch in ibranches:
                    antibranch = "x" + antibranch
                ibranches[branch] = antibranch
            else:
                antibranch = ibranches[branch]
            #document.warning(antibranch)
            document.body[i] = "\\begin_inset Branch " + antibranch

        # remove "inverted" key
        del document.body[i+1]
        i += 1

    # now we need to add the new branches to the header
    for old, new in ibranches.items():
        i = find_token(document.header, "\\branch " + old, 0)
        if i == -1:
            document.warning("Can't find branch %s even though we found it before!" % (old))
            continue
        j = find_token(document.header, "\\end_branch", i)
        if j == -1:
            document.warning("Malformed LyX document! Can't find end of branch " + old)
            continue
        # ourbranches[old] - 1 inverts the selection status of the old branch
        lines = ["\\branch " + new,
                 "\\selected " + str(ourbranches[old] - 1)]
        # these are the old lines telling us color, etc.
        lines += document.header[i+2 : j+1]
        document.header[i:i] = lines


def revert_beamer_article_styles(document):
    " Include (scr)article styles in beamer article "

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

    inclusion = "article.layout"
    if document.textclass == "scrarticle-beamer":
        inclusion = "scrartcl.layout"

    i = find_token(document.header, "\\begin_local_layout", 0)
    if i == -1:
        k = find_token(document.header, "\\language", 0)
        if k == -1:
            # this should not happen
            document.warning("Malformed LyX document! No \\language header found!")
            return
        document.header[k-1 : k-1] = ["\\begin_local_layout", "\\end_local_layout"]
        i = k - 1

    j = find_end_of(document.header, i, "\\begin_local_layout", "\\end_local_layout")
    if j == -1:
        # this should not happen
        document.warning("Malformed LyX document: Can't find end of local layout!")
        return

    document.header[i+1 : i+1] = [
        "### Inserted by lyx2lyx (more [scr]article styles) ###",
        "Input " + inclusion,
        "Input beamer.layout",
        "Provides geometry 0",
        "Provides hyperref 0",
        "DefaultFont",
        "     Family                Roman",
        "     Series                Medium",
        "     Shape                 Up",
        "     Size                  Normal",
        "     Color                 None",
        "EndFont",
        "Preamble",
        "     \\usepackage{beamerarticle,pgf}",
        "     % this default might be overridden by plain title style",
        "     \\newcommand\makebeamertitle{\\frame{\\maketitle}}%",
        "     \\AtBeginDocument{",
        "             \\let\\origtableofcontents=\\tableofcontents",
        "             \\def\\tableofcontents{\\@ifnextchar[{\\origtableofcontents}{\\gobbletableofcontents}}",
        "             \\def\\gobbletableofcontents#1{\\origtableofcontents}",
        "     }",
        "EndPreamble",
        "### End of insertion by lyx2lyx (more [scr]article styles) ###"
    ]


def convert_beamer_article_styles(document):
    " Remove included (scr)article styles in beamer article "

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

    i = find_token(document.header, "\\begin_local_layout", 0)
    if i == -1:
        return

    j = find_end_of(document.header, i, "\\begin_local_layout", "\\end_local_layout")
    if j == -1:
        # this should not happen
        document.warning("Malformed LyX document: Can't find end of local layout!")
        return

    k = find_token(document.header, "### Inserted by lyx2lyx (more [scr]article styles) ###", i, j)
    if k != -1:
        l = find_token(document.header, "### End of insertion by lyx2lyx (more [scr]article styles) ###", i, j)
        if l == -1:
            # this should not happen
            document.warning("End of lyx2lyx local layout insertion not found!")
            return

        if k == i + 1 and l == j - 1:
            # that was all the local layout there was
            document.header[i : j + 1] = []
        else:
            document.header[k : l + 1] = []


def revert_bosnian(document):
    "Set the document language to English but assure Bosnian output"

    if document.language == "bosnian":
        document.language = "english"
        i = find_token(document.header, "\\language bosnian", 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 bosnian,")
        else:
            l = find_token(document.header, "\\use_default_options", 0)
            document.header.insert(l + 1, "\\options bosnian")


def revert_friulan(document):
    "Set the document language to English but assure Friulan output"

    if document.language == "friulan":
        document.language = "english"
        i = find_token(document.header, "\\language friulan", 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 friulan,")
        else:
            l = find_token(document.header, "\\use_default_options", 0)
            document.header.insert(l + 1, "\\options friulan")


def revert_macedonian(document):
    "Set the document language to English but assure Macedonian output"

    if document.language == "macedonian":
        document.language = "english"
        i = find_token(document.header, "\\language macedonian", 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 macedonian,")
        else:
            l = find_token(document.header, "\\use_default_options", 0)
            document.header.insert(l + 1, "\\options macedonian")


def revert_piedmontese(document):
    "Set the document language to English but assure Piedmontese output"

    if document.language == "piedmontese":
        document.language = "english"
        i = find_token(document.header, "\\language piedmontese", 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 piedmontese,")
        else:
            l = find_token(document.header, "\\use_default_options", 0)
            document.header.insert(l + 1, "\\options piedmontese")


def revert_romansh(document):
    "Set the document language to English but assure Romansh output"

    if document.language == "romansh":
        document.language = "english"
        i = find_token(document.header, "\\language romansh", 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 romansh,")
        else:
            l = find_token(document.header, "\\use_default_options", 0)
            document.header.insert(l + 1, "\\options romansh")


def revert_amharic(document):
    "Set the document language to English but assure Amharic output"

    if document.language == "amharic":
        document.language = "english"
        i = find_token(document.header, "\\language amharic", 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 default"
        add_to_preamble(document, ["\\AtBeginDocument{\setotherlanguage{amharic}}"])
        document.body[2 : 2] = ["\\begin_layout Standard",
                                "\\begin_inset ERT", "status open", "",
                                "\\begin_layout Plain Layout", "", "",
                                "\\backslash",
                                "resetdefaultlanguage{amharic}",
                                "\\end_layout", "", "\\end_inset", "", "",
                                "\\end_layout", ""]


def revert_asturian(document):
    "Set the document language to English but assure Asturian output"

    if document.language == "asturian":
        document.language = "english"
        i = find_token(document.header, "\\language asturian", 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 default"
        add_to_preamble(document, ["\\AtBeginDocument{\setotherlanguage{asturian}}"])
        document.body[2 : 2] = ["\\begin_layout Standard",
                                "\\begin_inset ERT", "status open", "",
                                "\\begin_layout Plain Layout", "", "",
                                "\\backslash",
                                "resetdefaultlanguage{asturian}",
                                "\\end_layout", "", "\\end_inset", "", "",
                                "\\end_layout", ""]


def revert_kannada(document):
    "Set the document language to English but assure Kannada output"

    if document.language == "kannada":
        document.language = "english"
        i = find_token(document.header, "\\language kannada", 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 default"
        add_to_preamble(document, ["\\AtBeginDocument{\setotherlanguage{kannada}}"])
        document.body[2 : 2] = ["\\begin_layout Standard",
                                "\\begin_inset ERT", "status open", "",
                                "\\begin_layout Plain Layout", "", "",
                                "\\backslash",
                                "resetdefaultlanguage{kannada}",
                                "\\end_layout", "", "\\end_inset", "", "",
                                "\\end_layout", ""]


def revert_khmer(document):
    "Set the document language to English but assure Khmer output"

    if document.language == "khmer":
        document.language = "english"
        i = find_token(document.header, "\\language khmer", 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 default"
        add_to_preamble(document, ["\\AtBeginDocument{\setotherlanguage{khmer}}"])
        document.body[2 : 2] = ["\\begin_layout Standard",
                                "\\begin_inset ERT", "status open", "",
                                "\\begin_layout Plain Layout", "", "",
                                "\\backslash",
                                "resetdefaultlanguage{khmer}",
                                "\\end_layout", "", "\\end_inset", "", "",
                                "\\end_layout", ""]


def revert_urdu(document):
    "Set the document language to English but assure Urdu output"

    if document.language == "urdu":
        document.language = "english"
        i = find_token(document.header, "\\language urdu", 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 default"
        add_to_preamble(document, ["\\AtBeginDocument{\setotherlanguage{urdu}}"])
        document.body[2 : 2] = ["\\begin_layout Standard",
                                "\\begin_inset ERT", "status open", "",
                                "\\begin_layout Plain Layout", "", "",
                                "\\backslash",
                                "resetdefaultlanguage{urdu}",
                                "\\end_layout", "", "\\end_inset", "", "",
                                "\\end_layout", ""]


def revert_syriac(document):
    "Set the document language to English but assure Syriac output"

    if document.language == "syriac":
        document.language = "english"
        i = find_token(document.header, "\\language syriac", 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 default"
        add_to_preamble(document, ["\\AtBeginDocument{\setotherlanguage{syriac}}"])
        document.body[2 : 2] = ["\\begin_layout Standard",
                                "\\begin_inset ERT", "status open", "",
                                "\\begin_layout Plain Layout", "", "",
                                "\\backslash",
                                "resetdefaultlanguage{syriac}",
                                "\\end_layout", "", "\\end_inset", "", "",
                                "\\end_layout", ""]


def revert_quotes(document):
    " Revert Quote Insets in verbatim or Hebrew context to plain quotes "

    # First handle verbatim insets
    i = 0
    j = 0
    while i < len(document.body):
        words = document.body[i].split()
        if len(words) > 1 and words[0] == "\\begin_inset" and \
           ( words[1] in ["ERT", "listings"] or ( len(words) > 2 and words[2] in ["URL", "Chunk", "Sweave", "S/R"]) ):
            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
                continue
            while True:
                k = find_token(document.body, '\\begin_inset Quotes', i, j)
                if k == -1:
                    i += 1
                    break
                l = find_end_of_inset(document.body, k)
                if l == -1:
                    document.warning("Malformed LyX document: Can't find end of Quote inset at line " + str(k))
                    i = k
                    continue
                replace = "\""
                if document.body[k].endswith("s"):
                    replace = "'"
                document.body[k:l+1] = [replace]
        else:
            i += 1
            continue

    # Now verbatim layouts
    i = 0
    j = 0
    while i < len(document.body):
        words = document.body[i].split()
        if len(words) > 1 and words[0] == "\\begin_layout" and \
           words[1] in ["Verbatim", "Verbatim*", "Code", "Author_Email", "Author_URL"]:
            j = find_end_of_layout(document.body, i)
            if j == -1:
                document.warning("Malformed LyX document: Can't find end of " + words[1] + " layout at line " + str(i))
                i += 1
                continue
            while True:
                k = find_token(document.body, '\\begin_inset Quotes', i, j)
                if k == -1:
                    i += 1
                    break
                l = find_end_of_inset(document.body, k)
                if l == -1:
                    document.warning("Malformed LyX document: Can't find end of Quote inset at line " + str(k))
                    i = k
                    continue
                replace = "\""
                if document.body[k].endswith("s"):
                    replace = "'"
                document.body[k:l+1] = [replace]
        else:
            i += 1
            continue

    # Now handle Hebrew
    if not document.language == "hebrew" and find_token(document.body, '\\lang hebrew', 0) == -1:
        return

    i = 0
    j = 0
    while True:
        k = find_token(document.body, '\\begin_inset Quotes', i)
        if k == -1:
            return
        l = find_end_of_inset(document.body, k)
        if l == -1:
            document.warning("Malformed LyX document: Can't find end of Quote inset at line " + str(k))
            i = k
            continue
        hebrew = False
        parent = get_containing_layout(document.body, k)
        ql = find_token_backwards(document.body, "\\lang", k)
        if ql == -1 or ql < parent[1]:
            hebrew = document.language == "hebrew"
        elif document.body[ql] == "\\lang hebrew":
            hebrew = True
        if hebrew:
            replace = "\""
            if document.body[k].endswith("s"):
                replace = "'"
            document.body[k:l+1] = [replace]
        i = l


def revert_iopart(document):
    " Input new styles via local layout "
    if document.textclass != "iopart":
        return

    i = find_token(document.header, "\\begin_local_layout", 0)
    if i == -1:
        k = find_token(document.header, "\\language", 0)
        if k == -1:
            # this should not happen
            document.warning("Malformed LyX document! No \\language header found!")
            return
        document.header[k-1 : k-1] = ["\\begin_local_layout", "\\end_local_layout"]
        i = k-1

    j = find_end_of(document.header, i, "\\begin_local_layout", "\\end_local_layout")
    if j == -1:
        # this should not happen
        document.warning("Malformed LyX document! Can't find end of local layout!")
        return

    document.header[i+1 : i+1] = [
        "### Inserted by lyx2lyx (stdlayouts) ###",
        "Input stdlayouts.inc",
        "### End of insertion by lyx2lyx (stdlayouts) ###"
    ]


def convert_iopart(document):
    " Remove local layout we added, if it is there "
    if document.textclass != "iopart":
        return

    i = find_token(document.header, "\\begin_local_layout", 0)
    if i == -1:
        return

    j = find_end_of(document.header, i, "\\begin_local_layout", "\\end_local_layout")
    if j == -1:
        # this should not happen
        document.warning("Malformed LyX document! Can't find end of local layout!")
        return

    k = find_token(document.header, "### Inserted by lyx2lyx (stdlayouts) ###", i, j)
    if k != -1:
        l = find_token(document.header, "### End of insertion by lyx2lyx (stdlayouts) ###", i, j)
        if l == -1:
            # this should not happen
            document.warning("End of lyx2lyx local layout insertion not found!")
            return
        if k == i + 1 and l == j - 1:
            # that was all the local layout there was
            document.header[i : j + 1] = []
        else:
            document.header[k : l + 1] = []


def convert_quotestyle(document):
    " Convert \\quotes_language to \\quotes_style "
    i = find_token(document.header, "\\quotes_language", 0)
    if i == -1:
        document.warning("Malformed LyX document! Can't find \\quotes_language!")
        return
    val = get_value(document.header, "\\quotes_language", i)
    document.header[i] = "\\quotes_style " + val


def revert_quotestyle(document):
    " Revert \\quotes_style to \\quotes_language "
    i = find_token(document.header, "\\quotes_style", 0)
    if i == -1:
        document.warning("Malformed LyX document! Can't find \\quotes_style!")
        return
    val = get_value(document.header, "\\quotes_style", i)
    document.header[i] = "\\quotes_language " + val


def revert_plainquote(document):
    " Revert plain quote insets "

    # First, revert style setting
    i = find_token(document.header, "\\quotes_style plain", 0)
    if i != -1:
        document.header[i] = "\\quotes_style english"

    # now the insets
    i = 0
    j = 0
    while True:
        k = find_token(document.body, '\\begin_inset Quotes q', i)
        if k == -1:
            return
        l = find_end_of_inset(document.body, k)
        if l == -1:
            document.warning("Malformed LyX document: Can't find end of Quote inset at line " + str(k))
            i = k
            continue
        replace = "\""
        if document.body[k].endswith("s"):
            replace = "'"
        document.body[k:l+1] = [replace]
        i = l


def convert_frenchquotes(document):
    " Convert french quote insets to swiss "

    # First, revert style setting
    i = find_token(document.header, "\\quotes_style french", 0)
    if i != -1:
        document.header[i] = "\\quotes_style swiss"

    # now the insets
    i = 0
    while True:
        i = find_token(document.body, '\\begin_inset Quotes f', i)
        if i == -1:
            return
        val = get_value(document.body, "\\begin_inset Quotes", i)[7:]
        newval = val.replace("f", "c", 1)
        document.body[i] = document.body[i].replace(val, newval)
        i += 1


def revert_swissquotes(document):
    " Revert swiss quote insets to french "

    # First, revert style setting
    i = find_token(document.header, "\\quotes_style swiss", 0)
    if i != -1:
        document.header[i] = "\\quotes_style french"

    # now the insets
    i = 0
    while True:
        i = find_token(document.body, '\\begin_inset Quotes c', i)
        if i == -1:
            return
        val = get_value(document.body, "\\begin_inset Quotes", i)[7:]
        newval = val.replace("c", "f", 1)
        document.body[i] = document.body[i].replace(val, newval)
        i += 1


def revert_britishquotes(document):
    " Revert british quote insets to english "

    # First, revert style setting
    i = find_token(document.header, "\\quotes_style british", 0)
    if i != -1:
        document.header[i] = "\\quotes_style english"

    # now the insets
    i = 0
    while True:
        i = find_token(document.body, '\\begin_inset Quotes b', i)
        if i == -1:
            return
        val = get_value(document.body, "\\begin_inset Quotes", i)[7:]
        newval = val.replace("b", "e", 1)
        if val[2] == "d":
            # opening mark
            newval = newval.replace("d", "s")
        else:
            # closing mark
            newval = newval.replace("s", "d")
        document.body[i] = document.body[i].replace(val, newval)
        i += 1


def revert_swedishgquotes(document):
    " Revert swedish quote insets "

    # First, revert style setting
    i = find_token(document.header, "\\quotes_style swedishg", 0)
    if i != -1:
        document.header[i] = "\\quotes_style danish"

    # now the insets
    i = 0
    while True:
        i = find_token(document.body, '\\begin_inset Quotes w', i)
        if i == -1:
            return
        val = get_value(document.body, "\\begin_inset Quotes", i)[7:]
        if val[2] == "d":
            # outer marks
            newval = val.replace("w", "a", 1).replace("r", "l")
        else:
            # inner marks
            newval = val.replace("w", "s", 1)
        document.body[i] = document.body[i].replace(val, newval)
        i += 1


def revert_frenchquotes(document):
    " Revert french inner quote insets "

    i = 0
    while True:
        i = find_token(document.body, '\\begin_inset Quotes f', i)
        if i == -1:
            return
        val = get_value(document.body, "\\begin_inset Quotes", i)[7:]
        if val[2] == "s":
            # inner marks
            newval = val.replace("f", "e", 1).replace("s", "d")
            document.body[i] = document.body[i].replace(val, newval)
        i += 1


def revert_frenchinquotes(document):
    " Revert inner frenchin quote insets "

    # First, revert style setting
    i = find_token(document.header, "\\quotes_style frenchin", 0)
    if i != -1:
        document.header[i] = "\\quotes_style french"

    # now the insets
    i = 0
    while True:
        i = find_token(document.body, '\\begin_inset Quotes i', i)
        if i == -1:
            return
        val = get_value(document.body, "\\begin_inset Quotes", i)[7:]
        newval = val.replace("i", "f", 1)
        if val[2] == "s":
            # inner marks
            newval = newval.replace("s", "d")
        document.body[i] = document.body[i].replace(val, newval)
        i += 1


def revert_russianquotes(document):
    " Revert russian quote insets "

    # First, revert style setting
    i = find_token(document.header, "\\quotes_style russian", 0)
    if i != -1:
        document.header[i] = "\\quotes_style french"

    # now the insets
    i = 0
    while True:
        i = find_token(document.body, '\\begin_inset Quotes r', i)
        if i == -1:
            return
        val = get_value(document.body, "\\begin_inset Quotes", i)[7:]
        newval = val
        if val[2] == "s":
            # inner marks
            newval = val.replace("r", "g", 1).replace("s", "d")
        else:
            # outer marks
            newval = val.replace("r", "f", 1)
        document.body[i] = document.body[i].replace(val, newval)
        i += 1


def revert_dynamicquotes(document):
    " Revert dynamic quote insets "

    # First, revert header
    i = find_token(document.header, "\\dynamic_quotes", 0)
    if i != -1:
        del document.header[i]

    # Get global style
    style = "english"
    i = find_token(document.header, "\\quotes_style", 0)
    if i == -1:
        document.warning("Malformed document! Missing \\quotes_style")
    else:
        style = get_value(document.header, "\\quotes_style", i)

    s = "e"
    if style == "english":
        s = "e"
    elif style == "swedish":
        s = "s"
    elif style == "german":
        s = "g"
    elif style == "polish":
        s = "p"
    elif style == "swiss":
        s = "c"
    elif style == "danish":
        s = "a"
    elif style == "plain":
        s = "q"
    elif style == "british":
        s = "b"
    elif style == "swedishg":
        s = "w"
    elif style == "french":
        s = "f"
    elif style == "frenchin":
        s = "i"
    elif style == "russian":
        s = "r"

    # now transform the insets
    i = 0
    while True:
        i = find_token(document.body, '\\begin_inset Quotes x', i)
        if i == -1:
            return
        document.body[i] = document.body[i].replace("x", s)
        i += 1


def revert_cjkquotes(document):
    " Revert cjk quote insets "

    # Get global style
    style = "english"
    i = find_token(document.header, "\\quotes_style", 0)
    if i == -1:
        document.warning("Malformed document! Missing \\quotes_style")
    else:
        style = get_value(document.header, "\\quotes_style", i)

    global_cjk = style.find("cjk") != -1

    if global_cjk:
        document.header[i] = "\\quotes_style english"
        # transform dynamic insets
        s = "j"
        if style == "cjkangle":
            s = "k"
        i = 0
        while True:
            i = find_token(document.body, '\\begin_inset Quotes x', i)
            if i == -1:
                break
            document.body[i] = document.body[i].replace("x", s)
            i += 1

    cjk_langs = ["chinese-simplified", "chinese-traditional", "japanese", "japanese-cjk", "korean"]

    i = 0
    j = 0
    while True:
        k = find_token(document.body, '\\begin_inset Quotes j', i)
        if k == -1:
            break
        l = find_end_of_inset(document.body, k)
        if l == -1:
            document.warning("Malformed LyX document: Can't find end of Quote inset at line " + str(k))
            i = k
            continue
        cjk = False
        parent = get_containing_layout(document.body, k)
        ql = find_token_backwards(document.body, "\\lang", k)
        if ql == -1 or ql < parent[1]:
            cjk = document.language in cjk_langs
        elif document.body[ql].split()[1] in cjk_langs:
            cjk = True
        val = get_value(document.body, "\\begin_inset Quotes", i)[7:]
        replace = []
        if val[2] == "s":
            # inner marks
            if val[1] == "l":
                # inner opening mark
                if cjk:
                    replace = [u"\u300E"]
                else:
                    replace = ["\\begin_inset Formula $\\llceil$", "\\end_inset"]
            else:
                # inner closing mark
                if cjk:
                    replace = [u"\u300F"]
                else:
                    replace = ["\\begin_inset Formula $\\rrfloor$", "\\end_inset"]
        else:
            # outer marks
            if val[1] == "l":
                # outer opening mark
                if cjk:
                    replace = [u"\u300C"]
                else:
                    replace = ["\\begin_inset Formula $\\lceil$", "\\end_inset"]
            else:
                # outer closing mark
                if cjk:
                    replace = [u"\u300D"]
                else:
                    replace = ["\\begin_inset Formula $\\rfloor$", "\\end_inset"]

        document.body[k:l+1] = replace
        i = l

    i = 0
    j = 0
    while True:
        k = find_token(document.body, '\\begin_inset Quotes k', i)
        if k == -1:
            return
        l = find_end_of_inset(document.body, k)
        if l == -1:
            document.warning("Malformed LyX document: Can't find end of Quote inset at line " + str(k))
            i = k
            continue
        cjk = False
        parent = get_containing_layout(document.body, k)
        ql = find_token_backwards(document.body, "\\lang", k)
        if ql == -1 or ql < parent[1]:
            cjk = document.language in cjk_langs
        elif document.body[ql].split()[1] in cjk_langs:
            cjk = True
        val = get_value(document.body, "\\begin_inset Quotes", i)[7:]
        replace = []
        if val[2] == "s":
            # inner marks
            if val[1] == "l":
                # inner opening mark
                if cjk:
                    replace = [u"\u3008"]
                else:
                    replace = ["\\begin_inset Formula $\\langle$", "\\end_inset"]
            else:
                # inner closing mark
                if cjk:
                    replace = [u"\u3009"]
                else:
                    replace = ["\\begin_inset Formula $\\rangle$", "\\end_inset"]
        else:
            # outer marks
            if val[1] == "l":
                # outer opening mark
                if cjk:
                    replace = [u"\u300A"]
                else:
                    replace = ["\\begin_inset Formula $\\langle\\kern -2.5pt\\langle$", "\\end_inset"]
            else:
                # outer closing mark
                if cjk:
                    replace = [u"\u300B"]
                else:
                    replace = ["\\begin_inset Formula $\\rangle\\kern -2.5pt\\rangle$", "\\end_inset"]

        document.body[k:l+1] = replace
        i = l


def revert_crimson(document):
    " Revert native Cochineal/Crimson font definition to LaTeX "

    if find_token(document.header, "\\use_non_tex_fonts false", 0) != -1:
        preamble = ""
        i = find_token(document.header, "\\font_roman \"cochineal\"", 0)
        if i != -1:
            osf = False
            j = find_token(document.header, "\\font_osf true", 0)
            if j != -1:
                osf = True
            preamble = "\\usepackage"
            if osf:
                document.header[j] = "\\font_osf false"
                preamble += "[proportional,osf]"
            preamble += "{cochineal}"
            add_to_preamble(document, [preamble])
            document.header[i] = document.header[i].replace("cochineal", "default")


def revert_cochinealmath(document):
    " Revert cochineal newtxmath definitions to LaTeX "

    if find_token(document.header, "\\use_non_tex_fonts false", 0) != -1:
        i = find_token(document.header, "\\font_math \"cochineal-ntxm\"", 0)
        if i != -1:
            add_to_preamble(document, "\\usepackage[cochineal]{newtxmath}")
            document.header[i] = document.header[i].replace("cochineal-ntxm", "auto")


def revert_labelonly(document):
    " Revert labelonly tag for InsetRef "
    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("Can't find end of reference inset at line %d!!" %(i))
            i += 1
            continue
        k = find_token(document.body, "LatexCommand labelonly", i, j)
        if k == -1:
            i = j
            continue
        label = get_quoted_value(document.body, "reference", i, j)
        if not label:
            document.warning("Can't find label for reference at line %d!" %(i))
            i = j + 1
            continue
        document.body[i:j+1] = put_cmd_in_ert([label])
        i += 1


def revert_plural_refs(document):
    " Revert plural and capitalized references "
    i = find_token(document.header, "\\use_refstyle 1", 0)
    use_refstyle = (i != 0)

    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("Can't find end of reference inset at line %d!!" %(i))
            i += 1
            continue

        plural = caps = suffix = False
        k = find_token(document.body, "LaTeXCommand formatted", i, j)
        if k != -1 and use_refstyle:
            plural = get_bool_value(document.body, "plural", i, j, False)
            caps   = get_bool_value(document.body, "caps", i, j, False)
            label  = get_quoted_value(document.body, "reference", i, j)
            if label:
                try:
                    (prefix, suffix) = label.split(":", 1)
                except:
                    document.warning("No `:' separator in formatted reference at line %d!" % (i))
            else:
                document.warning("Can't find label for reference at line %d!" % (i))

        # this effectively tests also for use_refstyle and a formatted reference
        # we do this complicated test because we would otherwise do this erasure
        # over and over and over
        if not ((plural or caps) and suffix):
            del_token(document.body, "plural", i, j)
            del_token(document.body, "caps", i, j - 1) # since we deleted a line
            i = j - 1
            continue

        if caps:
            prefix = prefix[0].title() + prefix[1:]
        cmd = "\\" + prefix + "ref"
        if plural:
            cmd += "[s]"
        cmd += "{" + suffix + "}"
        document.body[i:j+1] = put_cmd_in_ert([cmd])
        i += 1


def revert_noprefix(document):
    " Revert labelonly tags with 'noprefix' set "
    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("Can't find end of reference inset at line %d!!" %(i))
            i += 1
            continue
        k = find_token(document.body, "LatexCommand labelonly", i, j)
        noprefix = False
        if k != -1:
            noprefix = get_bool_value(document.body, "noprefix", i, j)
        if not noprefix:
            # either it was not a labelonly command, or else noprefix was not set.
            # in that case, we just delete the option.
            del_token(document.body, "noprefix", i, j)
            i = j
            continue
        label = get_quoted_value(document.body, "reference", i, j)
        if not label:
            document.warning("Can't find label for reference at line %d!" %(i))
            i = j + 1
            continue
        try:
            (prefix, suffix) = label.split(":", 1)
        except:
            document.warning("No `:' separator in formatted reference at line %d!" % (i))
            # we'll leave this as an ordinary labelonly reference
            del_token(document.body, "noprefix", i, j)
            i = j
            continue
        document.body[i:j+1] = put_cmd_in_ert([suffix])
        i += 1


def revert_biblatex(document):
    " Revert biblatex support "

    #
    # Header
    #

    # 1. Get cite engine
    engine = "basic"
    i = find_token(document.header, "\\cite_engine", 0)
    if i == -1:
        document.warning("Malformed document! Missing \\cite_engine")
    else:
        engine = get_value(document.header, "\\cite_engine", i)

    # 2. Store biblatex state and revert to natbib
    biblatex = False
    if engine in ["biblatex", "biblatex-natbib"]:
        biblatex = True
        document.header[i] = "\\cite_engine natbib"

    # 3. Store and remove new document headers
    bibstyle = ""
    i = find_token(document.header, "\\biblatex_bibstyle", 0)
    if i != -1:
        bibstyle = get_value(document.header, "\\biblatex_bibstyle", i)
        del document.header[i]

    citestyle = ""
    i = find_token(document.header, "\\biblatex_citestyle", 0)
    if i != -1:
        citestyle = get_value(document.header, "\\biblatex_citestyle", i)
        del document.header[i]

    biblio_options = ""
    i = find_token(document.header, "\\biblio_options", 0)
    if i != -1:
        biblio_options = get_value(document.header, "\\biblio_options", i)
        del document.header[i]

    if biblatex:
        bbxopts = "[natbib=true"
        if bibstyle != "":
            bbxopts += ",bibstyle=" + bibstyle
        if citestyle != "":
            bbxopts += ",citestyle=" + citestyle
        if biblio_options != "":
            bbxopts += "," + biblio_options
        bbxopts += "]"
        add_to_preamble(document, "\\usepackage" + bbxopts + "{biblatex}")

    #
    # Body
    #

    # 1. Bibtex insets
    i = 0
    bibresources = []
    while (True):
        i = find_token(document.body, "\\begin_inset CommandInset bibtex", i)
        if i == -1:
            break
        j = find_end_of_inset(document.body, i)
        if j == -1:
            document.warning("Can't find end of bibtex inset at line %d!!" %(i))
            i += 1
            continue
        bibs = get_quoted_value(document.body, "bibfiles", i, j)
        opts = get_quoted_value(document.body, "biblatexopts", i, j)
        # store resources
        if bibs:
            bibresources += bibs.split(",")
        else:
            document.warning("Can't find bibfiles for bibtex inset at line %d!" %(i))
        # remove biblatexopts line
        k = find_token(document.body, "biblatexopts", i, j)
        if k != -1:
            del document.body[k]
        # Re-find inset end line
        j = find_end_of_inset(document.body, i)
        # Insert ERT \\printbibliography and wrap bibtex inset to a Note
        if biblatex:
            pcmd = "printbibliography"
            if opts:
                pcmd += "[" + opts + "]"
            repl = ["\\begin_inset ERT", "status open", "", "\\begin_layout Plain Layout",\
                    "", "", "\\backslash", pcmd, "\\end_layout", "", "\\end_inset", "", "",\
                    "\\end_layout", "", "\\begin_layout Standard", "\\begin_inset Note Note",\
                    "status open", "", "\\begin_layout Plain Layout" ]
            repl += document.body[i:j+1]
            repl += ["", "\\end_layout", "", "\\end_inset", "", ""]
            document.body[i:j+1] = repl
            j += 27

        i = j + 1

    if biblatex:
        for b in bibresources:
            add_to_preamble(document, "\\addbibresource{" + b + ".bib}")

    # 2. Citation insets

    # Specific citation insets used in biblatex that need to be reverted to ERT
    new_citations = {
        "Cite" : "Cite",
        "citebyear" : "citeyear",
        "citeyear" : "cite*",
        "Footcite" : "Smartcite",
        "footcite" : "smartcite",
        "Autocite" : "Autocite",
        "autocite" : "autocite",
        "citetitle" : "citetitle",
        "citetitle*" : "citetitle*",
        "fullcite" : "fullcite",
        "footfullcite" : "footfullcite",
        "supercite" : "supercite",
        "citeauthor" : "citeauthor",
        "citeauthor*" : "citeauthor*",
        "Citeauthor" : "Citeauthor",
        "Citeauthor*" : "Citeauthor*"
        }

    # All commands accepted by LyX < 2.3. Everything else throws an error.
    old_citations = [ "cite", "nocite", "citet", "citep", "citealt", "citealp",\
		      "citeauthor", "citeyear", "citeyearpar", "citet*", "citep*",\
                      "citealt*", "citealp*", "citeauthor*", "Citet",  "Citep",\
                      "Citealt",  "Citealp",  "Citeauthor", "Citet*", "Citep*",\
                      "Citealt*", "Citealp*", "Citeauthor*", "fullcite", "footcite",\
                      "footcitet", "footcitep", "footcitealt", "footcitealp",\
                      "footciteauthor", "footciteyear", "footciteyearpar",\
		      "citefield", "citetitle", "cite*" ]

    i = 0
    while (True):
        i = find_token(document.body, "\\begin_inset CommandInset citation", i)
        if i == -1:
            break
        j = find_end_of_inset(document.body, i)
        if j == -1:
            document.warning("Can't find end of citation inset at line %d!!" %(i))
            i += 1
            continue
        k = find_token(document.body, "LatexCommand", i, j)
        if k == -1:
            document.warning("Can't find LatexCommand for citation inset at line %d!" %(i))
            i = j + 1
            continue
        cmd = get_value(document.body, "LatexCommand", k)
        if biblatex and cmd in list(new_citations.keys()):
            pre = get_quoted_value(document.body, "before", i, j)
            post = get_quoted_value(document.body, "after", i, j)
            key = get_quoted_value(document.body, "key", i, j)
            if not key:
                document.warning("Citation inset at line %d does not have a key!" %(i))
                key = "???"
            # Replace known new commands with ERT
            res = "\\" + new_citations[cmd]
            if pre:
                res += "[" + pre + "]"
            if post:
                res += "[" + post + "]"
            elif pre:
                res += "[]"
            res += "{" + key + "}"
            document.body[i:j+1] = put_cmd_in_ert([res])
        elif cmd not in old_citations:
            # Reset unknown commands to cite. This is what LyX does as well
            # (but LyX 2.2 would break on unknown commands)
            document.body[k] = "LatexCommand cite"
            document.warning("Reset unknown cite command '%s' with cite" % cmd)
        i = j + 1

    # Emulate the old biblatex-workaround (pretend natbib in order to use the styles)
    if biblatex:
        i = find_token(document.header, "\\begin_local_layout", 0)
        if i == -1:
            k = find_token(document.header, "\\language", 0)
            if k == -1:
                # this should not happen
                document.warning("Malformed LyX document! No \\language header found!")
                return
            document.header[k-1 : k-1] = ["\\begin_local_layout", "\\end_local_layout"]
            i = k-1

        j = find_end_of(document.header, i, "\\begin_local_layout", "\\end_local_layout")
        if j == -1:
            # this should not happen
            document.warning("Malformed LyX document! Can't find end of local layout!")
            return

        document.header[i+1 : i+1] = [
            "### Inserted by lyx2lyx (biblatex emulation) ###",
            "Provides natbib 1",
            "### End of insertion by lyx2lyx (biblatex emulation) ###"
        ]


def revert_citekeyonly(document):
    " Revert keyonly cite command to ERT "

    i = 0
    while (True):
        i = find_token(document.body, "\\begin_inset CommandInset citation", i)
        if i == -1:
            break
        j = find_end_of_inset(document.body, i)
        if j == -1:
            document.warning("Can't find end of citation inset at line %d!!" %(i))
            i += 1
            continue
        k = find_token(document.body, "LatexCommand", i, j)
        if k == -1:
            document.warning("Can't find LatexCommand for citation inset at line %d!" %(i))
            i = j + 1
            continue
        cmd = get_value(document.body, "LatexCommand", k)
        if cmd != "keyonly":
            i = j + 1
            continue

        key = get_quoted_value(document.body, "key", i, j)
        if not key:
            document.warning("Citation inset at line %d does not have a key!" %(i))
        # Replace known new commands with ERT
        document.body[i:j+1] = put_cmd_in_ert([key])
        i = j + 1



def revert_bibpackopts(document):
    " Revert support for natbib/jurabib package options "

    engine = "basic"
    i = find_token(document.header, "\\cite_engine", 0)
    if i == -1:
        document.warning("Malformed document! Missing \\cite_engine")
    else:
        engine = get_value(document.header, "\\cite_engine", i)

    biblatex = False
    if engine not in ["natbib", "jurabib"]:
        return

    i = find_token(document.header, "\\biblio_options", 0)
    if i == -1:
        # Nothing to do if we have no options
        return

    biblio_options = get_value(document.header, "\\biblio_options", i)
    del document.header[i]

    if not biblio_options:
        # Nothing to do for empty options
        return

    i = find_token(document.header, "\\begin_local_layout", 0)
    if i == -1:
        k = find_token(document.header, "\\language", 0)
        if k == -1:
            # this should not happen
            document.warning("Malformed LyX document! No \\language header found!")
            return
        document.header[k-1 : k-1] = ["\\begin_local_layout", "\\end_local_layout"]
        i = k - 1

    j = find_end_of(document.header, i, "\\begin_local_layout", "\\end_local_layout")
    if j == -1:
        # this should not happen
        document.warning("Malformed LyX document! Can't find end of local layout!")
        return

    document.header[i+1 : i+1] = [
        "### Inserted by lyx2lyx (bibliography package options) ###",
        "PackageOptions " + engine + " " + biblio_options,
        "### End of insertion by lyx2lyx (bibliography package options) ###"
    ]


def revert_qualicites(document):
    " Revert qualified citation list commands to ERT "

    # Citation insets that support qualified lists, with their LaTeX code
    ql_citations = {
        "cite" : "cites",
        "Cite" : "Cites",
        "citet" : "textcites",
        "Citet" : "Textcites",
        "citep" : "parencites",
        "Citep" : "Parencites",
        "Footcite" : "Smartcites",
        "footcite" : "smartcites",
        "Autocite" : "Autocites",
        "autocite" : "autocites",
        }

    # Get cite engine
    engine = "basic"
    i = find_token(document.header, "\\cite_engine", 0)
    if i == -1:
        document.warning("Malformed document! Missing \\cite_engine")
    else:
        engine = get_value(document.header, "\\cite_engine", i)

    biblatex = engine in ["biblatex", "biblatex-natbib"]

    i = 0
    while (True):
        i = find_token(document.body, "\\begin_inset CommandInset citation", i)
        if i == -1:
            break
        j = find_end_of_inset(document.body, i)
        if j == -1:
            document.warning("Can't find end of citation inset at line %d!!" %(i))
            i += 1
            continue
        pres = find_token(document.body, "pretextlist", i, j)
        posts = find_token(document.body, "posttextlist", i, j)
        if pres == -1 and posts == -1:
            # nothing to do.
            i = j + 1
            continue
        pretexts = get_quoted_value(document.body, "pretextlist", pres)
        posttexts = get_quoted_value(document.body, "posttextlist", posts)
        k = find_token(document.body, "LatexCommand", i, j)
        if k == -1:
            document.warning("Can't find LatexCommand for citation inset at line %d!" %(i))
            i = j + 1
            continue
        cmd = get_value(document.body, "LatexCommand", k)
        if biblatex and cmd in list(ql_citations.keys()):
            pre = get_quoted_value(document.body, "before", i, j)
            post = get_quoted_value(document.body, "after", i, j)
            key = get_quoted_value(document.body, "key", i, j)
            if not key:
                document.warning("Citation inset at line %d does not have a key!" %(i))
                key = "???"
            keys = key.split(",")
            prelist = pretexts.split("\t")
            premap = dict()
            for pp in prelist:
                ppp = pp.split(" ", 1)
                premap[ppp[0]] = ppp[1]
            postlist = posttexts.split("\t")
            postmap = dict()
            for pp in postlist:
                ppp = pp.split(" ", 1)
                postmap[ppp[0]] = ppp[1]
            # Replace known new commands with ERT
            if "(" in pre or ")" in pre:
                pre = "{" + pre + "}"
            if "(" in post or ")" in post:
                post = "{" + post + "}"
            res = "\\" + ql_citations[cmd]
            if pre:
                res += "(" + pre + ")"
            if post:
                res += "(" + post + ")"
            elif pre:
                res += "()"
            for kk in keys:
                if premap.get(kk, "") != "":
                    res += "[" + premap[kk] + "]"
                if postmap.get(kk, "") != "":
                    res += "[" + postmap[kk] + "]"
                elif premap.get(kk, "") != "":
                    res += "[]"
                res += "{" + kk + "}"
            document.body[i:j+1] = put_cmd_in_ert([res])
        else:
            # just remove the params
            del document.body[posttexts]
            del document.body[pretexts]
            i += 1


command_insets = ["bibitem", "citation", "href", "index_print", "nomenclature"]
def convert_literalparam(document):
    " Add param literal "

    pos = len("\\begin_inset CommandInset ")
    i = 0
    while True:
        i = find_token(document.body, '\\begin_inset CommandInset', i)
        if i == -1:
            break
        inset = document.body[i][pos:].strip()
        if not inset in command_insets:
            i += 1
            continue
        j = find_end_of_inset(document.body, i)
        if j == -1:
            document.warning("Malformed LyX document: Can't find end of %s inset at line %d" % (inset, i))
            i += 1
            continue
        while i < j and document.body[i].strip() != '':
            i += 1
        # href is already fully latexified. Here we can switch off literal.
        if inset == "href":
            document.body.insert(i, "literal \"false\"")
        else:
            document.body.insert(i, "literal \"true\"")
        i = j + 1



def revert_literalparam(document):
    " Remove param literal "

    for inset in command_insets:
        i = 0
        while True:
            i = find_token(document.body, '\\begin_inset CommandInset %s' % inset, 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 %s inset at line %d" % (inset, i))
                i += 1
                continue
            k = find_token(document.body, 'literal', i, j)
            if k == -1:
                i += 1
                continue
            del document.body[k]



def revert_multibib(document):
    " Revert multibib support "

    # 1. Get cite engine
    engine = "basic"
    i = find_token(document.header, "\\cite_engine", 0)
    if i == -1:
        document.warning("Malformed document! Missing \\cite_engine")
    else:
        engine = get_value(document.header, "\\cite_engine", i)

    # 2. Do we use biblatex?
    biblatex = False
    if engine in ["biblatex", "biblatex-natbib"]:
        biblatex = True

    # 3. Store and remove multibib document header
    multibib = ""
    i = find_token(document.header, "\\multibib", 0)
    if i != -1:
        multibib = get_value(document.header, "\\multibib", i)
        del document.header[i]

    if not multibib:
        return

    # 4. The easy part: Biblatex
    if biblatex:
        i = find_token(document.header, "\\biblio_options", 0)
        if i == -1:
            k = find_token(document.header, "\\use_bibtopic", 0)
            if k == -1:
                # this should not happen
                document.warning("Malformed LyX document! No \\use_bibtopic header found!")
                return
            document.header[k-1 : k-1] = ["\\biblio_options " + "refsection=" + multibib]
        else:
            biblio_options = get_value(document.header, "\\biblio_options", i)
            if biblio_options:
                biblio_options += ","
            biblio_options += "refsection=" + multibib
            document.header[i] = "\\biblio_options " + biblio_options

        # Bibtex insets
        i = 0
        while (True):
            i = find_token(document.body, "\\begin_inset CommandInset bibtex", i)
            if i == -1:
                break
            j = find_end_of_inset(document.body, i)
            if j == -1:
                document.warning("Can't find end of bibtex inset at line %d!!" %(i))
                i += 1
                continue
            btprint = get_quoted_value(document.body, "btprint", i, j)
            if btprint != "bibbysection":
                i += 1
                continue
            opts = get_quoted_value(document.body, "biblatexopts", i, j)
            # change btprint line
            k = find_token(document.body, "btprint", i, j)
            if k != -1:
                document.body[k] = "btprint \"btPrintCited\""
            # Insert ERT \\bibbysection and wrap bibtex inset to a Note
            pcmd = "bibbysection"
            if opts:
                pcmd += "[" + opts + "]"
            repl = ["\\begin_inset ERT", "status open", "", "\\begin_layout Plain Layout",\
                    "", "", "\\backslash", pcmd, "\\end_layout", "", "\\end_inset", "", "",\
                    "\\end_layout", "", "\\begin_layout Standard", "\\begin_inset Note Note",\
                    "status open", "", "\\begin_layout Plain Layout" ]
            repl += document.body[i:j+1]
            repl += ["", "\\end_layout", "", "\\end_inset", "", ""]
            document.body[i:j+1] = repl
            j += 27

            i = j + 1
        return

    # 5. More tricky: Bibtex/Bibtopic
    k = find_token(document.header, "\\use_bibtopic", 0)
    if k == -1:
        # this should not happen
        document.warning("Malformed LyX document! No \\use_bibtopic header found!")
        return
    document.header[k] = "\\use_bibtopic true"

    # Possible units. This assumes that the LyX name follows the std,
    # which might not always be the case. But it's as good as we can get.
    units = {
        "part" : "Part",
        "chapter" : "Chapter",
        "section" : "Section",
        "subsection" : "Subsection",
        }

    if multibib not in units.keys():
        document.warning("Unknown multibib value `%s'!" % nultibib)
        return
    unit = units[multibib]
    btunit = False
    i = 0
    while (True):
        i = find_token(document.body, "\\begin_layout " + unit, i)
        if i == -1:
            break
        if btunit:
            document.body[i-1 : i-1] = ["\\begin_layout Standard",
                                "\\begin_inset ERT", "status open", "",
                                "\\begin_layout Plain Layout", "", "",
                                "\\backslash",
                                "end{btUnit}", "\\end_layout",
                                "\\begin_layout Plain Layout", "",
                                "\\backslash",
                                "begin{btUnit}"
                                "\\end_layout", "", "\\end_inset", "", "",
                                "\\end_layout", ""]
            i += 21
        else:
            document.body[i-1 : i-1] = ["\\begin_layout Standard",
                                "\\begin_inset ERT", "status open", "",
                                "\\begin_layout Plain Layout", "", "",
                                "\\backslash",
                                "begin{btUnit}"
                                "\\end_layout", "", "\\end_inset", "", "",
                                "\\end_layout", ""]
            i += 16
        btunit = True
        i += 1

    if btunit:
        i = find_token(document.body, "\\end_body", i)
        document.body[i-1 : i-1] = ["\\begin_layout Standard",
                                "\\begin_inset ERT", "status open", "",
                                "\\begin_layout Plain Layout", "", "",
                                "\\backslash",
                                "end{btUnit}"
                                "\\end_layout", "", "\\end_inset", "", "",
                                "\\end_layout", ""]


def revert_chapterbib(document):
    " Revert chapterbib support "

    # 1. Get cite engine
    engine = "basic"
    i = find_token(document.header, "\\cite_engine", 0)
    if i == -1:
        document.warning("Malformed document! Missing \\cite_engine")
    else:
        engine = get_value(document.header, "\\cite_engine", i)

    # 2. Do we use biblatex?
    biblatex = False
    if engine in ["biblatex", "biblatex-natbib"]:
        biblatex = True

    # 3. Store multibib document header value
    multibib = ""
    i = find_token(document.header, "\\multibib", 0)
    if i != -1:
        multibib = get_value(document.header, "\\multibib", i)

    if not multibib or multibib != "child":
        # nothing to do
        return

    # 4. remove multibib header
    del document.header[i]

    # 5. Biblatex
    if biblatex:
        # find include insets
        i = 0
        while (True):
            i = find_token(document.body, "\\begin_inset CommandInset include", i)
            if i == -1:
                break
            j = find_end_of_inset(document.body, i)
            if j == -1:
                document.warning("Can't find end of bibtex inset at line %d!!" %(i))
                i += 1
                continue
            parent = get_containing_layout(document.body, i)
            parbeg = parent[1]

            # Insert ERT \\newrefsection before inset
            beg = ["\\begin_layout Standard",
                   "\\begin_inset ERT", "status open", "",
                   "\\begin_layout Plain Layout", "", "",
                   "\\backslash",
                   "newrefsection"
                   "\\end_layout", "", "\\end_inset", "", "",
                   "\\end_layout", ""]
            document.body[parbeg-1:parbeg-1] = beg
            j += len(beg)
            i = j + 1
        return

    # 6. Bibtex/Bibtopic
    i = find_token(document.header, "\\use_bibtopic", 0)
    if i == -1:
        # this should not happen
        document.warning("Malformed LyX document! No \\use_bibtopic header found!")
        return
    if get_value(document.header, "\\use_bibtopic", i) == "true":
        # find include insets
        i = 0
        while (True):
            i = find_token(document.body, "\\begin_inset CommandInset include", i)
            if i == -1:
                break
            j = find_end_of_inset(document.body, i)
            if j == -1:
                document.warning("Can't find end of bibtex inset at line %d!!" %(i))
                i += 1
                continue
            parent = get_containing_layout(document.body, i)
            parbeg = parent[1]
            parend = parent[2]

            # Insert wrap inset into \\begin{btUnit}...\\end{btUnit}
            beg = ["\\begin_layout Standard",
                   "\\begin_inset ERT", "status open", "",
                   "\\begin_layout Plain Layout", "", "",
                   "\\backslash",
                   "begin{btUnit}"
                   "\\end_layout", "", "\\end_inset", "", "",
                   "\\end_layout", ""]
            end = ["\\begin_layout Standard",
                   "\\begin_inset ERT", "status open", "",
                   "\\begin_layout Plain Layout", "", "",
                   "\\backslash",
                   "end{btUnit}"
                   "\\end_layout", "", "\\end_inset", "", "",
                   "\\end_layout", ""]
            document.body[parend+1:parend+1] = end
            document.body[parbeg-1:parbeg-1] = beg
            j += len(beg) + len(end)
            i = j + 1
        return

    # 7. Chapterbib proper
    add_to_preamble(document, ["\\usepackage{chapterbib}"])


def convert_dashligatures(document):
    "Set 'use_dash_ligatures' according to content."
    use_dash_ligatures = None
    # eventually remove preamble code from 2.3->2.2 conversion:
    for i, line in enumerate(document.preamble):
        if i > 1 and line == r'\renewcommand{\textemdash}{---}':
            if (document.preamble[i-1] == r'\renewcommand{\textendash}{--}'
                and document.preamble[i-2] == '% Added by lyx2lyx'):
                del document.preamble[i-2:i+1]
                use_dash_ligatures = True
    if use_dash_ligatures is None:
        # Look for dashes:
        # (Documents by LyX 2.1 or older have "\twohyphens\n" or "\threehyphens\n"
        # as interim representation for dash ligatures in 2.2.)
        has_literal_dashes = False
        has_ligature_dashes = False
        j = 0
        for i, line in enumerate(document.body):
            # Skip some document parts where dashes are not converted
            if (i < j) or line.startswith("\\labelwidthstring"):
                continue
            words = line.split()
            if (len(words) > 1 and words[0] == "\\begin_inset"
                and (words[1] in ["CommandInset", "ERT", "External", "Formula",
                                 "FormulaMacro", "Graphics", "IPA", "listings"]
                     or ' '.join(words[1:]) == "Flex Code")):
                j = find_end_of_inset(document.body, i)
                if j == -1:
                    document.warning("Malformed LyX document: "
                        "Can't find end of %s inset at line %d" % (words[1],i))
                continue
            if line == "\\begin_layout LyX-Code":
                j = find_end_of_layout(document.body, i)
                if j == -1:
                    document.warning("Malformed LyX document: "
                       "Can't find end of %s layout at line %d" % (words[1],i))
                continue
            # literal dash followed by a word or no-break space:
            if re.search(u"[\u2013\u2014]([\w\u00A0]|$)", line,
                         flags=re.UNICODE):
                has_literal_dashes = True
            # ligature dash followed by word or no-break space on next line:
            if re.search(u"(\\\\twohyphens|\\\\threehyphens)", line,
                            flags=re.UNICODE) and re.match(u"[\w\u00A0]",
                            document.body[i+1], flags=re.UNICODE):
                has_ligature_dashes = True
        if has_literal_dashes and has_ligature_dashes:
            # TODO: insert a warning note in the document?
            document.warning('This document contained both literal and '
                '"ligature" dashes.\n Line breaks may have changed. '
                'See UserGuide chapter 3.9.1 for details.')
        elif has_literal_dashes:
            use_dash_ligatures = False
        elif has_ligature_dashes:
            use_dash_ligatures = True
    # insert the setting if there is a preferred value
    if use_dash_ligatures is not None:
        i = find_token(document.header, "\\use_microtype", 0)
        if i != -1:
            document.header.insert(i+1, "\\use_dash_ligatures %s"
                                % str(use_dash_ligatures).lower())

def revert_dashligatures(document):
    """Remove font ligature settings for en- and em-dashes.
    Revert conversion of \twodashes or \threedashes to literal dashes."""
    i = find_token(document.header, "\\use_dash_ligatures", 0)
    if i == -1:
        return
    use_dash_ligatures = get_bool_value(document.header, "\\use_dash_ligatures", i)
    del document.header[i]
    if not use_dash_ligatures or document.backend != "latex":
        return

    j = 0
    new_body = []
    for i, line in enumerate(document.body):
        # Skip some document parts where dashes are not converted
        if (i < j) or line.startswith("\\labelwidthstring"):
            new_body.append(line)
            continue
        words = line.split()
        if (len(words) > 1 and words[0] == "\\begin_inset"
            and (words[1] in ["CommandInset", "ERT", "External", "Formula",
                              "FormulaMacro", "Graphics", "IPA", "listings"]
                 or ' '.join(words[1:]) == "Flex Code")):
            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))
            new_body.append(line)
            continue
        if line == "\\begin_layout LyX-Code":
            j = find_end_of_layout(document.body, i)
            if j == -1:
                document.warning("Malformed LyX document: "
                    "Can't find end of %s layout at line %d" % (words[1],i))
            new_body.append(line)
            continue
        # TODO: skip replacement in typewriter fonts
        line = line.replace(u'\u2013', '\\twohyphens\n')
        line = line.replace(u'\u2014', '\\threehyphens\n')
        lines = line.split('\n')
        new_body.extend(line.split('\n'))
    document.body = new_body
    # redefine the dash LICRs to use ligature dashes:
    add_to_preamble(document, [r'\renewcommand{\textendash}{--}',
                               r'\renewcommand{\textemdash}{---}'])


def revert_noto(document):
    " Revert Noto font definitions to LaTeX "

    if find_token(document.header, "\\use_non_tex_fonts false", 0) != -1:
        preamble = ""
        i = find_token(document.header, "\\font_roman \"NotoSerif-TLF\"", 0)
        if i != -1:
            add_to_preamble(document, ["\\renewcommand{\\rmdefault}{NotoSerif-TLF}"])
            document.header[i] = document.header[i].replace("NotoSerif-TLF", "default")
        i = find_token(document.header, "\\font_sans \"NotoSans-TLF\"", 0)
        if i != -1:
            add_to_preamble(document, ["\\renewcommand{\\sfdefault}{NotoSans-TLF}"])
            document.header[i] = document.header[i].replace("NotoSans-TLF", "default")
        i = find_token(document.header, "\\font_typewriter \"NotoMono-TLF\"", 0)
        if i != -1:
            add_to_preamble(document, ["\\renewcommand{\\ttdefault}{NotoMono-TLF}"])
            document.header[i] = document.header[i].replace("NotoMono-TLF", "default")


def revert_xout(document):
  " Reverts \\xout font attribute "
  changed = revert_font_attrs(document.body, "\\xout", "\\xout")
  if changed == True:
    insert_to_preamble(document, \
        ['%  for proper cross-out',
        '\\PassOptionsToPackage{normalem}{ulem}',
        '\\usepackage{ulem}'])


def convert_mathindent(document):
    " add the \\is_math_indent tag "
    # check if the document uses the class option "fleqn"
    k = find_token(document.header, "\\quotes_style", 0)
    regexp = re.compile(r'^.*fleqn.*')
    i = find_re(document.header, regexp, 0)
    if i != -1:
        document.header.insert(k, "\\is_math_indent 1")
        # delete the found option
        document.header[i] = document.header[i].replace(",fleqn", "")
        document.header[i] = document.header[i].replace(", fleqn", "")
        document.header[i] = document.header[i].replace("fleqn,", "")
        j = find_re(document.header, regexp, 0)
        if i == j:
            # then we have fleqn as the only option
            del document.header[i]
    else:
        document.header.insert(k, "\\is_math_indent 0")


def revert_mathindent(document):
    " Define mathindent if set in the document "
    # first output the length
    regexp = re.compile(r'(\\math_indentation)')
    i = find_re(document.header, regexp, 0)
    if i != -1:
        value = get_value(document.header, "\\math_indentation" , i).split()[0]
        if value != "default":
            add_to_preamble(document, ["\\setlength{\\mathindent}{" + value + '}'])
        del document.header[i]
    # now set the document class option
    regexp = re.compile(r'(\\is_math_indent 1)')
    i = find_re(document.header, regexp, 0)
    if i == -1:
        regexp = re.compile(r'(\\is_math_indent)')
        j = find_re(document.header, regexp, 0)
        del document.header[j]
    else:
        k = find_token(document.header, "\\options", 0)
        if k != -1:
    	    document.header[k] = document.header[k].replace("\\options", "\\options fleqn,")
    	    del document.header[i]
        else:
            l = find_token(document.header, "\\use_default_options", 0)
            document.header.insert(l, "\\options fleqn")
            del document.header[i + 1]


def revert_baselineskip(document):
  " Revert baselineskips to TeX code "
  i = 0
  vspaceLine = 0
  hspaceLine = 0
  while True:
    regexp = re.compile(r'^.*baselineskip%.*$')
    i = find_re(document.body, regexp, i)
    if i == -1:
      return
    vspaceLine = find_token(document.body, "\\begin_inset VSpace", i)
    if  vspaceLine == i:
      # output VSpace inset as TeX code
      # first read out the values
      beg = document.body[i].rfind("VSpace ");
      end = document.body[i].rfind("baselineskip%");
      baselineskip = float(document.body[i][beg + 7:end]);
      # we store the value in percent, thus divide by 100
      baselineskip = baselineskip/100;
      baselineskip = str(baselineskip);
      # check if it is the starred version
      if document.body[i].find('*') != -1:
        star = '*'
      else:
        star = ''
      # now output TeX code
      endInset = find_end_of_inset(document.body, i)
      if endInset == -1:
        document.warning("Malformed LyX document: Missing '\\end_inset' of VSpace inset.")
        return
      else:
        document.body[vspaceLine: endInset + 1] = put_cmd_in_ert("\\vspace" + star + '{' + baselineskip + "\\baselineskip}")
    hspaceLine = find_token(document.body, "\\begin_inset space \\hspace", i - 1)
    document.warning("hspaceLine: " + str(hspaceLine))
    document.warning("i: " + str(i))
    if  hspaceLine == i - 1:
      # output space inset as TeX code
      # first read out the values
      beg = document.body[i].rfind("\\length ");
      end = document.body[i].rfind("baselineskip%");
      baselineskip = float(document.body[i][beg + 7:end]);
      document.warning("baselineskip: " + str(baselineskip))
      # we store the value in percent, thus divide by 100
      baselineskip = baselineskip/100;
      baselineskip = str(baselineskip);
      # check if it is the starred version
      if document.body[i-1].find('*') != -1:
        star = '*'
      else:
        star = ''
      # now output TeX code
      endInset = find_end_of_inset(document.body, i)
      if endInset == -1:
        document.warning("Malformed LyX document: Missing '\\end_inset' of space inset.")
        return
      else:
        document.body[hspaceLine: endInset + 1] = put_cmd_in_ert("\\hspace" + star + '{' + baselineskip + "\\baselineskip}")

    i = i + 1


def revert_rotfloat(document):
  " Revert placement options for rotated floats "
  i = 0
  j = 0
  k = 0
  while True:
    i = find_token(document.body, "sideways true", i)
    if i != -1:
      regexp = re.compile(r'^.*placement.*$')
      j = find_re(document.body, regexp, i-2)
      if j == -1:
          return
      if j != i-2:
          i = i + 1
          continue
    else:
      return
    # we found a sideways float with placement options
    # at first store the placement
    beg = document.body[i-2].rfind(" ");
    placement = document.body[i-2][beg+1:]
    # check if the option'H' is used
    if placement.find("H") != -1:
      add_to_preamble(document, ["\\usepackage{float}"])
    # now check if it is a starred type
    if document.body[i-1].find("wide true") != -1:
      star = '*'
    else:
      star = ''
    # store the float type
    beg = document.body[i-3].rfind(" ");
    fType = document.body[i-3][beg+1:]
    # now output TeX code
    endInset = find_end_of_inset(document.body, i-3)
    if endInset == -1:
      document.warning("Malformed LyX document: Missing '\\end_inset' of Float inset.")
      return
    else:
      document.body[endInset-2: endInset+1] = put_cmd_in_ert("\\end{sideways" + fType + star + '}')
      document.body[i-3: i+2] = put_cmd_in_ert("\\begin{sideways" + fType + star + "}[" + placement + ']')
      add_to_preamble(document, ["\\usepackage{rotfloat}"])

    i = i + 1


def convert_allowbreak(document):
    " Zero widths Space-inset -> \SpecialChar allowbreak. "
    body = "\n".join(document.body)
    body = body.replace("\\begin_inset space \hspace{}\n"
                        "\\length 0dd\n"
                        "\\end_inset\n\n",
                        "\\SpecialChar allowbreak\n")
    document.body = body.split("\n")


def revert_allowbreak(document):
    " \SpecialChar allowbreak -> Zero widths Space-inset. "
    body = "\n".join(document.body)
    body = body.replace("\\SpecialChar allowbreak\n",
                        "\n\\begin_inset space \hspace{}\n"
                        "\\length 0dd\n"
                        "\\end_inset\n\n")
    document.body = body.split("\n")


def convert_mathnumberpos(document):
    " add the \\math_number_before tag "
    # check if the document uses the class option "leqno"
    k = find_token(document.header, "\\quotes_style", 0)
    m = find_token(document.header, "\\options", 0)
    regexp = re.compile(r'^.*leqno.*')
    i = find_re(document.header, regexp, 0)
    if i != -1 and i == m:
        document.header.insert(k, "\\math_number_before 1")
        # delete the found option
        document.header[i] = document.header[i].replace(",leqno", "")
        document.header[i] = document.header[i].replace(", leqno", "")
        document.header[i] = document.header[i].replace("leqno,", "")
        j = find_re(document.header, regexp, 0)
        if i == j:
            # then we have leqno as the only option
            del document.header[i]
    else:
        document.header.insert(k, "\\math_number_before 0")


def revert_mathnumberpos(document):
    " add the document class option leqno"
    regexp = re.compile(r'(\\math_number_before 1)')
    i = find_re(document.header, regexp, 0)
    if i == -1:
        regexp = re.compile(r'(\\math_number_before)')
        j = find_re(document.header, regexp, 0)
        del document.header[j]
    else:
        k = find_token(document.header, "\\options", 0)
        if k != -1:
    	    document.header[k] = document.header[k].replace("\\options", "\\options leqno,")
    	    del document.header[i]
        else:
            l = find_token(document.header, "\\use_default_options", 0)
            document.header.insert(l, "\\options leqno")
            del document.header[i + 1]


def convert_mathnumberingname(document):
    " rename the \\math_number_before tag to \\math_numbering_side "
    regexp = re.compile(r'(\\math_number_before 1)')
    i = find_re(document.header, regexp, 0)
    if i != -1:
        document.header[i] = "\\math_numbering_side left"
    regexp = re.compile(r'(\\math_number_before 0)')
    i = find_re(document.header, regexp, 0)
    if i != -1:
        document.header[i] = "\\math_numbering_side default"
    # check if the document uses the class option "reqno"
    k = find_token(document.header, "\\math_numbering_side", 0)
    m = find_token(document.header, "\\options", 0)
    regexp = re.compile(r'^.*reqno.*')
    i = find_re(document.header, regexp, 0)
    if i != -1 and i == m:
        document.header[k] = "\\math_numbering_side right"
        # delete the found option
        document.header[i] = document.header[i].replace(",reqno", "")
        document.header[i] = document.header[i].replace(", reqno", "")
        document.header[i] = document.header[i].replace("reqno,", "")
        j = find_re(document.header, regexp, 0)
        if i == j:
            # then we have reqno as the only option
            del document.header[i]


def revert_mathnumberingname(document):
    " rename the \\math_numbering_side tag back to \\math_number_before "
    # just rename
    regexp = re.compile(r'(\\math_numbering_side left)')
    i = find_re(document.header, regexp, 0)
    if i != -1:
        document.header[i] = "\\math_number_before 1"
    # add the option reqno and delete the tag
    regexp = re.compile(r'(\\math_numbering_side right)')
    i = find_re(document.header, regexp, 0)
    if i != -1:
        document.header[i] = "\\math_number_before 0"
        k = find_token(document.header, "\\options", 0)
        if k != -1:
    	    document.header[k] = document.header[k].replace("\\options", "\\options reqno,")
        else:
            l = find_token(document.header, "\\use_default_options", 0)
            document.header.insert(l, "\\options reqno")
    # add the math_number_before tag
    regexp = re.compile(r'(\\math_numbering_side default)')
    i = find_re(document.header, regexp, 0)
    if i != -1:
        document.header[i] = "\\math_number_before 0"


def convert_minted(document):
    " add the \\use_minted tag "
    document.header.insert(-1, "\\use_minted 0")


def revert_minted(document):
    " remove the \\use_minted tag "
    i = find_token(document.header, "\\use_minted", 0)
    if i != -1:
        document.header.pop(i)


def revert_longtable_lscape(document):
    " revert the longtable landcape mode to ERT "
    i = 0
    regexp = re.compile(r'^<features rotate=\"90\"\s.*islongtable=\"true\"\s.*$', re.IGNORECASE)
    while True:
        i = find_re(document.body, regexp, i)
        if i == -1:
            return

        document.body[i] = document.body[i].replace(" rotate=\"90\"", "")
        lay = get_containing_layout(document.body, i)
        if lay == False:
            document.warning("Longtable has not layout!")
            i += 1
            continue
        begcmd = put_cmd_in_ert("\\begin{landscape}")
        endcmd = put_cmd_in_ert("\\end{landscape}")
        document.body[lay[2] : lay[2]] = endcmd + ["\\end_layout"]
        document.body[lay[1] : lay[1]] = ["\\begin_layout " + lay[0], ""] + begcmd

        add_to_preamble(document, ["\\usepackage{pdflscape}"])
        i = lay[2]


##
# Conversion hub
#

supported_versions = ["2.3.0", "2.3"]
convert = [
           [509, [convert_microtype]],
           [510, [convert_dateinset]],
           [511, [convert_ibranches]],
           [512, [convert_beamer_article_styles]],
           [513, []],
           [514, []],
           [515, []],
           [516, [convert_inputenc]],
           [517, []],
           [518, [convert_iopart]],
           [519, [convert_quotestyle]],
           [520, []],
           [521, [convert_frenchquotes]],
           [522, []],
           [523, []],
           [524, []],
           [525, []],
           [526, []],
           [527, []],
           [528, []],
           [529, []],
           [530, []],
           [531, []],
           [532, [convert_literalparam]],
           [533, []],
           [534, []],
           [535, [convert_dashligatures]],
           [536, []],
           [537, []],
           [538, [convert_mathindent]],
           [539, []],
           [540, []],
           [541, [convert_allowbreak]],
           [542, [convert_mathnumberpos]],
           [543, [convert_mathnumberingname]],
           [544, [convert_minted]]
          ]

revert =  [
           [543, [revert_minted, revert_longtable_lscape]],
           [542, [revert_mathnumberingname]],
           [541, [revert_mathnumberpos]],
           [540, [revert_allowbreak]],
           [539, [revert_rotfloat]],
           [538, [revert_baselineskip]],
           [537, [revert_mathindent]],
           [536, [revert_xout]],
           [535, [revert_noto]],
           [534, [revert_dashligatures]],
           [533, [revert_chapterbib]],
           [532, [revert_multibib]],
           [531, [revert_literalparam]],
           [530, [revert_qualicites]],
           [529, [revert_bibpackopts]],
           [528, [revert_citekeyonly]],
           [527, [revert_biblatex]],
           [526, [revert_noprefix]],
           [525, [revert_plural_refs]],
           [524, [revert_labelonly]],
           [523, [revert_crimson, revert_cochinealmath]],
           [522, [revert_cjkquotes]],
           [521, [revert_dynamicquotes]],
           [520, [revert_britishquotes, revert_swedishgquotes, revert_frenchquotes, revert_frenchinquotes, revert_russianquotes, revert_swissquotes]],
           [519, [revert_plainquote]],
           [518, [revert_quotestyle]],
           [517, [revert_iopart]],
           [516, [revert_quotes]],
           [515, []],
           [514, [revert_urdu, revert_syriac]],
           [513, [revert_amharic, revert_asturian, revert_kannada, revert_khmer]],
           [512, [revert_bosnian, revert_friulan, revert_macedonian, revert_piedmontese, revert_romansh]],
           [511, [revert_beamer_article_styles]],
           [510, [revert_ibranches]],
           [509, []],
           [508, [revert_microtype]]
          ]


if __name__ == "__main__":
    pass