]> git.lyx.org Git - lyx.git/blobdiff - lib/lyx2lyx/lyx_2_3.py
Fix cantarell reversion
[lyx.git] / lib / lyx2lyx / lyx_2_3.py
index d3f3d409be88744f62db3965ef9c4314d37b0646..5f80d23fcae3e08270aa96feff21bb7b4f6a0304 100644 (file)
@@ -1,6 +1,5 @@
 # -*- coding: utf-8 -*-
 # This file is part of lyx2lyx
-# -*- coding: utf-8 -*-
 # Copyright (C) 2016 The LyX team
 #
 # This program is free software; you can redistribute it and/or
@@ -25,22 +24,16 @@ 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_tokens, \
-#  find_token_exact, find_end_of_inset, \
-#  is_in_inset, get_value, get_quoted_value, \
-#  del_token, check_token, get_option_value, get_bool_value
-
-from parser_tools import find_token, find_end_of_inset, get_value, \
-     get_bool_value, get_containing_layout
+from parser_tools import (del_token, del_value, del_complete_lines,
+    find_complete_lines, find_end_of, find_end_of_layout, find_end_of_inset,
+    find_re, find_substring, find_token, find_token_backwards, find_across_lines,
+    get_containing_inset, get_containing_layout, get_bool_value, get_value,
+    get_quoted_value, is_in_inset, set_bool_value)
+#  find_tokens, find_token_exact, check_token, get_option_value
 
-from lyx2lyx_tools import add_to_preamble, put_cmd_in_ert
-#  get_ert, lyx2latex, \
-#  lyx2verbatim, length_in_bp, convert_info_insets
-#  insert_to_preamble, latex_length, revert_flex_inset, \
-#  revert_font_attrs, hex2ratio, str2bool
-
-from lyx2lyx_tools import add_to_preamble, put_cmd_in_ert
+from lyx2lyx_tools import (add_to_preamble, put_cmd_in_ert, revert_font_attrs,
+    insert_to_preamble, latex_length, is_document_option,
+    insert_document_option, remove_document_option, revert_language)
 
 ####################################################################
 # Private helper functions
@@ -55,26 +48,20 @@ from lyx2lyx_tools import add_to_preamble, put_cmd_in_ert
 
 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)
+    i = find_token(document.header, "\\font_tt_scale")
+    j = find_token(document.preamble, "\\usepackage{microtype}")
     if j == -1:
         document.header.insert(i + 1, "\\use_microtype false")
     else:
         document.header.insert(i + 1, "\\use_microtype true")
         del document.preamble[j]
+        if j and document.preamble[j-1] == "% Added by lyx2lyx":
+            del document.preamble[j-1]
 
 
 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]
+    use_microtype = get_bool_value(document.header, "\\use_microtype", delete=True)
     if use_microtype:
         add_to_preamble(document, ["\\usepackage{microtype}"])
 
@@ -83,38 +70,33 @@ def convert_dateinset(document):
     ' Convert date external inset to ERT '
     i = 0
     while True:
-        i = find_token(document.body, "\\begin_inset External", i)
+        i = find_token(document.body, "\\begin_inset External", i+1)
         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
+        i = j # skip inset
 
 
 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":
+    """Replace no longer supported input encoding setting."""
+    i = find_token(document.header, "\\inputencoding pt254")
+    if i != -1:
         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)
+        i = find_token(document.body, "\\begin_inset Branch", i+1)
         if i == -1:
             return
         document.body.insert(i + 1, "inverted 0")
-        i += 1
 
 
 def revert_ibranches(document):
@@ -123,56 +105,43 @@ def revert_ibranches(document):
     ourbranches = {}
     i = 0
     while True:
-        i = find_token(document.header, "\\branch", i)
+        i = find_token(document.header, "\\branch", i+1)
         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
-            
+        selected = get_bool_value(document.header, "\\selected", i+1, i+2)
+        if selected is None:
+            document.warning("Malformed LyX document: No selection indicator "
+                             "for branch %s." % branch)
+            selected = True
         # the value tells us whether the branch is selected
-        ourbranches[document.header[i][8:].strip()] = selected
-        i += 1
+        ourbranches[branch] = selected
 
-    # Figure out what inverted branches, if any, have been used
-    # and convert them to "Anti-OldBranch"
-    ibranches = {}
+    # Find branch insets, remove "inverted" tag and
+    # convert inverted insets to "Anti-OldBranch" insets
+    antibranches = {}
     i = 0
     while True:
-        i = find_token(document.body, "\\begin_inset Branch", i)
+        i = find_token(document.body, "\\begin_inset Branch", i+1)
         if i == -1:
             break
-        if not document.body[i+1].startswith("inverted "):
-            document.warning("Malformed LyX document: Missing 'inverted' tag!")
-            i += 1
+        inverted = get_bool_value(document.body, "inverted", i+1, i+2, delete=True)
+        if inverted is None:
+            document.warning("Malformed LyX document: Missing 'inverted' tag in branch inset.")
             continue
-        inverted = document.body[i+1][9]
-        #document.warning(document.body[i+1])
-
-        if inverted == "1":
+        if inverted:
             branch = document.body[i][20:].strip()
-            #document.warning(branch)
-            if not branch in ibranches:
+            if not branch in antibranches:
                 antibranch = "Anti-" + branch
-                while antibranch in ibranches:
+                while antibranch in antibranches:
                     antibranch = "x" + antibranch
-                ibranches[branch] = antibranch
+                antibranches[branch] = antibranch
             else:
-                antibranch = ibranches[branch]
-            #document.warning(antibranch)
+                antibranch = antibranches[branch]
             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.iteritems():
+    for old, new in antibranches.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))
@@ -181,14 +150,38 @@ def revert_ibranches(document):
         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)]
+                 "\\selected %d" % (not ourbranches[old])]
         # these are the old lines telling us color, etc.
         lines += document.header[i+2 : j+1]
         document.header[i:i] = lines
 
 
+beamer_article_styles = [
+    "### Inserted by lyx2lyx (more [scr]article styles) ###",
+    "Input article.layout",
+    "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 revert_beamer_article_styles(document):
     " Include (scr)article styles in beamer article "
 
@@ -196,51 +189,9 @@ def revert_beamer_article_styles(document):
     if document.textclass not in beamer_articles:
         return
 
-    inclusion = "article.layout"
     if document.textclass == "scrarticle-beamer":
-        inclusion = "scrartcl.layout"
-
-    while True:
-        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!")
-                break
-            document.header[k-1 : k-1] = ["\\begin_local_layout", "\\end_local_layout"]
-            i = find_token(document.header, "\\begin_local_layout", 0)
-        if i != -1:
-            j = find_end_of(document.header, i, "\\begin_local_layout", "\\end_local_layout")
-            if j == -1:
-                # this should not happen
-                break
-
-            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) ###"]
-        return
-
+        beamer_article_styles[1] = "Input scrartcl.layout"
+    document.append_local_layout(beamer_article_styles)
 
 def convert_beamer_article_styles(document):
     " Remove included (scr)article styles in beamer article "
@@ -249,248 +200,68 @@ def convert_beamer_article_styles(document):
     if document.textclass not in beamer_articles:
         return
 
-    while True:
-        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
-            break
-
-        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!")
-                break
-
-            document.header[k : l + 1] = []
-
-        return
-
-
-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")
-
+    if document.textclass == "scrarticle-beamer":
+        beamer_article_styles[1] = "Input scrartcl.layout"
+    document.del_local_layout(beamer_article_styles)
 
-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_new_babel_languages(document):
+    """Revert "bosnian", "friulan", "macedonian", "piedmontese", "romansh".
 
+    Set the document language to English but use correct babel setting.
+    """
 
-def revert_piedmontese(document):
-    "Set the document language to English but assure Piedmontese output"
+    nblanguages = ["bosnian", "friulan", "macedonian", "piedmontese", "romansh"]
 
-    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,")
+    for lang in nblanguages:
+        if lang == "bosnian" or lang == "macedonian":
+            # These are only supported by babel
+            revert_language(document, lang, lang, "")
         else:
-            l = find_token(document.header, "\\use_default_options", 0)
-            document.header.insert(l + 1, "\\options piedmontese")
-
+            # These are supported by babel and polyglossia
+            revert_language(document, lang, lang, lang)
 
-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")
+# TODO:
+# def convert_new_babel_languages(document)
+# set to native support if get_value(document.header, "\\options") in
+# ["bosnian", "friulan", "macedonian", "piedmontese", "romansh"]
+# and Babel is used.
 
 
 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", ""]
+    revert_language(document, "amharic", "", "amharic")
 
 
 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", ""]
+    revert_language(document, "asturian", "", "asturian")
 
 
 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", ""]
+    revert_language(document, "kannada", "", "kannada")
 
 
 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", ""]
+    revert_language(document, "khmer", "", "khmer")
 
 
 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", ""]
+    revert_language(document, "urdu", "", "urdu")
 
 
 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", ""]
+    revert_language(document, "syriac", "", "syriac")
 
 
 def revert_quotes(document):
@@ -504,6 +275,7 @@ def revert_quotes(document):
         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
@@ -518,10 +290,10 @@ def revert_quotes(document):
                     document.warning("Malformed LyX document: Can't find end of Quote inset at line " + str(k))
                     i = k
                     continue
-                replace = "\""
+                replace = '"'
                 if document.body[k].endswith("s"):
                     replace = "'"
-                document.body[k:l+1] = [replace]
+                document.body[k:l+2] = [replace]
         else:
             i += 1
             continue
@@ -551,7 +323,7 @@ def revert_quotes(document):
                 replace = "\""
                 if document.body[k].endswith("s"):
                     replace = "'"
-                document.body[k:l+1] = [replace]
+                document.body[k:l+2] = [replace]
         else:
             i += 1
             continue
@@ -582,9 +354,1614 @@ def revert_quotes(document):
             replace = "\""
             if document.body[k].endswith("s"):
                 replace = "'"
-            document.body[k:l+1] = [replace]
+            document.body[k:l+2] = [replace]
+        i = l
+
+
+iopart_local_layout = ["### Inserted by lyx2lyx (stdlayouts) ###",
+                       "Input stdlayouts.inc",
+                       "### End of insertion by lyx2lyx (stdlayouts) ###"""]
+
+def revert_iopart(document):
+    " Input new styles via local layout "
+    if document.textclass != "iopart":
+        return
+    document.append_local_layout(iopart_local_layout)
+
+
+def convert_iopart(document):
+    " Remove local layout we added, if it is there "
+    if document.textclass != "iopart":
+        return
+    document.del_local_layout(iopart_local_layout)
+
+
+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+2] = [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 convert_crimson(document):
+    """Transform preamble code to native font setting."""
+    # Quick-check:
+    i = find_substring(document.preamble, "{cochineal}")
+    if i == -1:
+        return
+    # Find and delete user-preamble code:
+    if document.preamble[i] == "\\usepackage[proportional,osf]{cochineal}":
+        osf = True
+    elif document.preamble[i] == "\\usepackage{cochineal}":
+        osf = False
+    else:
+        return
+    del document.preamble[i]
+    if i and document.preamble[i-1] == "% Added by lyx2lyx":
+        del document.preamble[i-1]
+
+    # Convert to native font setting:
+    j = find_token(document.header, '\\font_roman')
+    if j == -1:
+        romanfont = ['\font_roman', '"cochineal"', '"default"']
+    else:
+        romanfont = document.header[j].split()
+        romanfont[1] = '"cochineal"'
+    document.header[j] = " ".join(romanfont)
+    try:
+        set_bool_value(document.header, '\\font_osf', osf)
+    except ValueError: # no \\font_osf setting in document.header
+        if osf:
+            document.header.insert(-1, "\\font_osf true")
+
+
+def revert_crimson(document):
+    " Revert native Cochineal/Crimson font definition to LaTeX "
+
+    i = find_token(document.header, '\\font_roman "cochineal"')
+    if i == -1:
+        return
+    # replace unsupported font setting
+    document.header[i] = document.header[i].replace("cochineal", "default")
+    # no need for preamble code with system fonts
+    if get_bool_value(document.header, "\\use_non_tex_fonts"):
+        return
+    # transfer old style figures setting to package options
+    j = find_token(document.header, "\\font_osf true")
+    if j != -1:
+        options = "[proportional,osf]"
+        document.header[j] = "\\font_osf false"
+    else:
+        options = ""
+    add_to_preamble(document, ["\\usepackage%s{cochineal}"%options])
+
+
+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:
+        biblatex_emulation = [
+            "### Inserted by lyx2lyx (biblatex emulation) ###",
+            "Provides natbib 1",
+            "### End of insertion by lyx2lyx (biblatex emulation) ###"
+        ]
+        document.append_local_layout(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
+
+    bibliography_package_options = [
+        "### Inserted by lyx2lyx (bibliography package options) ###",
+        "PackageOptions " + engine + " " + biblio_options,
+        "### End of insertion by lyx2lyx (bibliography package options) ###"
+    ]
+    document.append_local_layout(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+1)
+            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))
+                continue
+            del_token(document.body, 'literal', i, j)
+
+
+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.
+    """
+    # Look for and remove dashligatures workaround from 2.3->2.2 reversion,
+    # set use_dash_ligatures to True if found, to None else.
+    use_dash_ligatures = del_complete_lines(document.preamble,
+                                ['% Added by lyx2lyx',
+                                 r'\renewcommand{\textendash}{--}',
+                                 r'\renewcommand{\textemdash}{---}']) or None
+
+    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 -- an ---.)
+        lines = document.body
+        has_literal_dashes = has_ligature_dashes = False
+        dash_pattern = re.compile(u".*[\u2013\u2014]|\\twohyphens|\\threehyphens")
+        i = j = 0
+        while True:
+            # skip lines without dashes:
+            i = find_re(lines, dash_pattern, i+1)
+            if i == -1:
+                break
+            line = lines[i]
+            # skip label width string (see bug 10243):
+            if line.startswith("\\labelwidthstring"):
+                continue
+            # do not touch hyphens in some insets (cf. lyx_2_2.convert_dashes):
+            try:
+                inset_type, start, end = get_containing_inset(lines, i)
+            except TypeError: # no containing inset
+                inset_type, start, end = "no inset", -1, -1
+            if (inset_type.split()[0] in
+                ["CommandInset", "ERT", "External", "Formula",
+                 "FormulaMacro", "Graphics", "IPA", "listings"]
+                or inset_type == "Flex Code"):
+                i = end
+                continue
+            try:
+                layoutname, start, end, j = get_containing_layout(lines, i)
+            except TypeError: # no (or malformed) containing layout
+                document.warning("Malformed LyX document: "
+                                "Can't find layout at line %d" % i)
+                continue
+            if not layoutname:
+                document.warning("Malformed LyX document: "
+                                 "Missing layout name on line %d"%start)
+            if layoutname == "LyX-Code":
+                i = end
+                continue
+
+            # literal dash followed by a non-white-character or no-break space:
+            if re.search(u"[\u2013\u2014]([\S\u00A0\u202F\u2060]|$)",
+                         line, flags=re.UNICODE):
+                has_literal_dashes = True
+            # ligature dash followed by non-white-char or no-break space on next line:
+            if (re.search(r"(\\twohyphens|\\threehyphens)", line) and
+                re.match(u"[\S\u00A0\u202F\u2060]", lines[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.')
+                break
+
+        if has_literal_dashes and not has_ligature_dashes:
+            use_dash_ligatures = False
+        elif has_ligature_dashes and not has_literal_dashes:
+            use_dash_ligatures = True
+
+    # insert the setting if there is a preferred value
+    if use_dash_ligatures is True:
+        document.header.insert(-1, "\\use_dash_ligatures true")
+    elif use_dash_ligatures is False:
+        document.header.insert(-1, "\\use_dash_ligatures false")
+
+
+def revert_dashligatures(document):
+    """Remove font ligature settings for en- and em-dashes.
+    Revert conversion of \twodashes or \threedashes to literal dashes.
+    """
+    use_dash_ligatures = del_value(document.header, "\\use_dash_ligatures")
+    if use_dash_ligatures != "true" or document.backend != "latex":
+        return
+    i = 0
+    dash_pattern = re.compile(u".*[\u2013\u2014]")
+    while True:
+        # skip lines without dashes:
+        i = find_re(document.body, dash_pattern, i+1)
+        if i == -1:
+            break
+        line = document.body[i]
+        # skip label width string (see bug 10243):
+        if line.startswith("\\labelwidthstring"):
+            continue
+        # do not touch hyphens in some insets (cf. lyx_2_2.convert_dashes):
+        try:
+            inset_type, start, end = get_containing_inset(document.body, i)
+        except TypeError: # no containing inset
+            inset_type, start, end = "no inset", -1, -1
+        if (inset_type.split()[0] in
+            ["CommandInset", "ERT", "External", "Formula",
+                "FormulaMacro", "Graphics", "IPA", "listings"]
+            or inset_type == "Flex Code"):
+            i = end
+            continue
+        try:
+            layoutname, start, end, j = get_containing_layout(document.body, i)
+        except TypeError: # no (or malformed) containing layout
+            document.warning("Malformed LyX document: "
+                            "Can't find layout at body line %d" % i)
+            continue
+        if layoutname == "LyX-Code":
+            i = end
+            continue
+        # TODO: skip replacement in typewriter fonts
+        line = line.replace(u'\u2013', '\\twohyphens\n')
+        line = line.replace(u'\u2014', '\\threehyphens\n')
+        document.body[i:i+1] = line.split('\n')
+    # 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.
+    """
+    k = find_token(document.header, "\\quotes_style") # where to insert
+    # check if the document uses the class option "fleqn"
+    options = get_value(document.header, "\\options")
+    if 'fleqn' in options:
+        document.header.insert(k, "\\is_math_indent 1")
+        # delete the fleqn option
+        i = find_token(document.header, "\\options")
+        options = [option for option in options.split(",")
+                   if option.strip() != "fleqn"]
+        if options:
+            document.header[i] = "\\options " + ",".join(options)
+        else:
+            del document.header[i]
+    else:
+        document.header.insert(k, "\\is_math_indent 0")
+
+def revert_mathindent(document):
+    " Define mathindent if set in the document "
+    # emulate and delete \math_indentation
+    value = get_value(document.header, "\\math_indentation",
+                      default="default", delete=True)
+    if value != "default":
+        add_to_preamble(document, [r"\setlength{\mathindent}{%s}"%value])
+    # delete \is_math_indent and emulate via document class option
+    if not get_bool_value(document.header, "\\is_math_indent", delete=True):
+        return
+    i = find_token(document.header, "\\options")
+    if i != -1:
+        document.header[i] = document.header[i].replace("\\options ",
+                                                        "\\options fleqn,")
+    else:
+        l = find_token(document.header, "\\use_default_options")
+        document.header.insert(l, "\\options fleqn")
+
+
+def revert_baselineskip(document):
+    " Revert baselineskips to TeX code "
+    i = 0
+    while True:
+        i = find_substring(document.body, "baselineskip%", i+1)
+        if i == -1:
+            return
+        if  document.body[i].startswith("\\begin_inset VSpace"):
+            # output VSpace inset as TeX code
+            end = find_end_of_inset(document.body, i)
+            if end == -1:
+                document.warning("Malformed LyX document: "
+                        "Can't find end of VSpace inset at line %d." % i)
+                continue
+            # read out the value
+            baselineskip = document.body[i].split()[-1]
+            # check if it is the starred version
+            star = '*' if '*' in document.body[i] else ''
+            # now output TeX code
+            cmd = "\\vspace%s{%s}" %(star, latex_length(baselineskip)[1])
+            document.body[i:end+1] = put_cmd_in_ert(cmd)
+            i += 8
+            continue
+        begin, end = is_in_inset(document.body, i, "\\begin_inset space \\hspace")
+        if  begin != - 1:
+            # output space inset as TeX code
+            baselineskip = document.body[i].split()[-1]
+            star = '*' if '*' in document.body[i-1] else ''
+            cmd = "\\hspace%s{%s}" %(star, latex_length(baselineskip)[1])
+            document.body[begin:end+1] = put_cmd_in_ert(cmd)
+
+
+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:
+      return
+    if not document.body[i-2].startswith('placement '):
+        i = i + 1
+        continue
+    # 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
+
+
+allowbreak_emulation =  [r"\begin_inset space \hspace{}",
+                         r"\length 0dd",
+                         r"\end_inset",
+                         r""]
+
+def convert_allowbreak(document):
+    " Zero widths Space-inset -> \SpecialChar allowbreak. "
+    lines = document.body
+    i = find_complete_lines(lines, allowbreak_emulation, 2)
+    while i != -1:
+        lines[i-1:i+4] = [lines[i-1] + r"\SpecialChar allowbreak"]
+        i = find_complete_lines(lines, allowbreak_emulation, i+3)
+
+
+def revert_allowbreak(document):
+    " \SpecialChar allowbreak -> Zero widths Space-inset. "
+    i = 1
+    lines = document.body
+    while i < len(lines):
+        if lines[i].endswith(r"\SpecialChar allowbreak"):
+            lines[i:i+1] = [lines[i].replace(r"\SpecialChar allowbreak", "")
+                           ] + allowbreak_emulation
+            i += 5
+        else:
+            i += 1
+
+
+def convert_mathnumberpos(document):
+    " add the \\math_number_before tag "
+    i = find_token(document.header, "\\quotes_style")
+    # check if the document uses the class option "leqno"
+    if is_document_option(document, "leqno"):
+        remove_document_option(document, "leqno")
+        document.header.insert(i, "\\math_number_before 1")
+    else:
+        document.header.insert(i, "\\math_number_before 0")
+
+
+def revert_mathnumberpos(document):
+    """Remove \\math_number_before tag,
+    add the document class option leqno if required.
+    """
+    math_number_before = get_bool_value(document.header, '\\math_number_before',
+                                        delete=True)
+    if math_number_before:
+        insert_document_option(document, "leqno")
+
+
+def convert_mathnumberingname(document):
+    " rename the \\math_number_before tag to \\math_numbering_side "
+    i = find_token(document.header, "\\math_number_before")
+    math_number_before = get_bool_value(document.header, '\\math_number_before', i)
+    if math_number_before:
+        document.header[i] = "\\math_numbering_side left"
+        return
+    # check if the document uses the class option "reqno"
+    k = find_token(document.header, "\\options")
+    if 'reqno' in document.header[k]:
+        document.header[i] = "\\math_numbering_side right"
+        # delete the found option
+        document.header[k] = document.header[k].replace(",reqno", "")
+        document.header[k] = document.header[k].replace(", reqno", "")
+        document.header[k] = document.header[k].replace("reqno,", "")
+        if 'reqno' in document.header[k]:
+            # then we have reqno as the only option
+            del document.header[k]
+    else:
+        document.header[i] = "\\math_numbering_side default"
+
+
+def revert_mathnumberingname(document):
+    " rename the \\math_numbering_side tag back to \\math_number_before "
+    i = find_token(document.header, "\\math_numbering_side")
+    math_numbering_side = get_value(document.header, '\\math_numbering_side', i)
+    # rename tag and set boolean value:
+    if math_numbering_side == "left":
+        document.header[i] = "\\math_number_before 1"
+    elif math_numbering_side == "right":
+        # also add the option reqno:
+        document.header[i] = "\\math_number_before 0"
+        k = find_token(document.header, "\\options")
+        if k != -1  and 'reqno' not in document.header[k]:
+            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")
+    else:
+        document.header[i] = "\\math_number_before 0"
+
+
+def convert_minted(document):
+    " add the \\use_minted tag "
+    i = find_token(document.header, "\\index ")
+    document.header.insert(i, "\\use_minted 0")
+
+
+def revert_minted(document):
+    " remove the \\use_minted tag "
+    del_token(document.header, "\\use_minted")
+
+
+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]
 
 
 ##
@@ -601,15 +1978,69 @@ convert = [
            [514, []],
            [515, []],
            [516, [convert_inputenc]],
-           [517, []]  
+           [517, []],
+           [518, [convert_iopart]],
+           [519, [convert_quotestyle]],
+           [520, []],
+           [521, [convert_frenchquotes]],
+           [522, []],
+           [523, []],
+           [524, [convert_crimson]],
+           [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]],
+           [512, [revert_new_babel_languages]],
            [511, [revert_beamer_article_styles]],
            [510, [revert_ibranches]],
            [509, []],