]> git.lyx.org Git - lyx.git/blobdiff - lib/scripts/layout2layout.py
Add AllowedInInsets and AllowedInLayouts InsetLayout tags
[lyx.git] / lib / scripts / layout2layout.py
index 36e4130d9a63292acdc99f28be05832becf1f0e9..5f4a50470644f2cca289cec97bbb73f146658536 100644 (file)
@@ -10,8 +10,9 @@
 
 # This script will update a .layout file to current format
 
+# The latest layout format is also defined in src/TextClass.cpp
+currentFormat = 102
 
-import os, re, string, sys
 
 # Incremented to format 4, 6 April 2007, lasgouttes
 # Introduction of generic "Provides" declaration
@@ -48,7 +49,7 @@ import os, re, string, sys
 # Rename I18NPreamble to BabelPreamble and add LangPreamble
 
 # Incremented to format 15, 28 May 2009 by lasgouttes
-# Add new tag OutputFormat; modules can be conditioned on feature 
+# Add new tag OutputFormat; modules can be conditioned on feature
 # "from->to".
 
 # Incremented to format 16, 5 June 2009 by rgh
@@ -162,19 +163,210 @@ import os, re, string, sys
 # Incremented to format 48, 31 May 2013 by rgh
 # Add InitialValue tag for counters
 
+# Incremented to format 49, 10 Feb 2014 by gb
+# Change default of "ResetsFont" tag to false
+
+# Incremented to format 50, 9 May 2014 by forenr
+# Removal of "Separator" layouts
+
+# Incremented to format 51, 29 May 2014 by spitz
+# New Style tag "ToggleIndent"
+
+# Incremented to format 52, 1 December 2014 by spitz
+# New InsetLayout tag "ForceOwnlines"
+
+# Incremented to format 53, 7 December 2014 by spitz
+# New InsetLayout tag "ObsoletedBy"
+
+# Incremented to format 54, 11 Jan 2014 by gb
+# New InsetLayout tag "FixedWidthPreambleEncoding"
+
+# Incremented to format 55, 20 April 2015 by spitz
+# New InsetLayout and Layout tags "PassThruChars"
+
+# Incremented to format 56, 20 May 2015 by spitz
+# New Float tags "AllowedPlacement", "AllowsWide", "AllowsSideways"
+
+# Incremented to format 57, 30 May 2015 by spitz
+# New Layout tag "ParagraphGroup"
+
+# Incremented to format 58, 5 December 2015, by rgh
+# New Layout tag "ProvideStyle"
+# Change "IfStyle" to "ModifyStyle"
+
+# Incremented to format 59, 22 November 2015 by gm
+# New Tag "OutlinerName"
+# New Layout tags "AddToToc", "IsTocCaption"
+# New Layout argument tag "IsTocCaption"
+
+# Incremented to format 60, 25 March 2016 by lasgouttes
+# Rename caption subtype LongTableNoNumber to Unnumbered
+
+# Incremented to format 61, 14 October 2016 by spitz
+# New Layout tags "ResumeCounter", "StepMasterCounter"
+
+# Incremented to format 62, 21 October 2016 by spitz
+# New Layout argument tag "PassThru"
+
+# Incremented to format 63, 7 January 2017 by spitz
+# - New textclass tags CiteFramework, MaxCiteNames (for cite engines)
+# - Extended InsetCite syntax.
+
+# Incremented to format 64, 30 August 2017 by rgh
+# Strip leading and trailing spaces from LabelString,
+# LabelStringAppendix, and EndLabelString, and LabelCounter,
+# to conform to what we used to do.
+
+# Incremented to format 65, 16 October 2017 by spitz
+# Color collapsable -> collapsible
+
+# Incremented to format 66, 28 December 2017 by spitz
+# New Layout tags "AutoNests ... EndAutoNests" and
+# "IsAutoNestedBy ... EndIsAutoNestedBy"
+
+# Incremented to format 67, 14 April 2018 by spitz
+# New Layout tag "NeedsCProtect"
+
+# Incremented to format 68, 21 May 2018 by spitz
+# New Layout tag "AddToCiteEngine"
+
+# Incremented to format 69, 16 August 2018 by spitz
+# New argument type "listpreamble"
+
+# Incremented to format 70, 5 June 2018 by rkh
+# New InsetLayout tag EditExternal
+
+# Incremented to format 71, 12 March 2019 by spitz
+# New [Inset]Layout tag NeedMBoxProtect
+
+# Incremented to format 72, 26 March 2019 by spitz
+# New TextClass tag TableStyle
+
+# Incremented to format 73, 18 April 2019 by spitz
+# New InsetLayout tag MenuString
+
+# Incremented to format 74, 18 April 2019 by spitz
+# New InsetLayout and Argument tag NewlineCmd
+
+# Incremented to format 75, 2 June 2019 by spitz
+# New Argument tags FreeSpacing, InsertOnNewline
+# New InsetLayout tag ParbreakIgnored
+
+# Incremented to format 76, 8 July 2019 by spitz
+# New textclass tag BibInToc
+
+# Incremented to format 77, 6 August 2019 by spitz
+# New textclass tag PageSize (= default page size)
+# and textclass option PageSize (= list of available page sizes)
+
+# Incremented to format 78, 6 August 2019 by spitz
+# New textclass tag FontsizeFormat
+
+# Incremented to format 79, 7 August 2019 by spitz
+# New textclass tag PagesizeFormat
+
+# Incremented to format 80, 12 August 2019 by spitz
+# New float option Requires
+
+# Incremented to format 81, 12 August 2019 by rikiheck
+# New tag GuiName for counters
+
+# Incremented to format 82, 4 June 2017 by tcuvelier
+# - Add new tags for Layout:
+#   DocBookTag, DocBookAttr, DocBookInInfo,
+#   DocBookWrapperTag, DocBookWrapperAttr,
+#   DocBookItemWrapperTag, DocBookItemWrapperAttr,
+#   DocBookItemTag, DocBookItemAttr,
+#   DocBookLabelTag, DocBookLabelAttr
+# - Removed tag Header from ClassOptionsClassOptions
+# - Removed tag Element for flex insets
+
+# Incremented to format 83, 2 August 2020 by tcuvelier
+# New tags DocBookWrapperMergeWithPrevious and DocBookAbstract
+
+# Incremented to format 84, 17 August 2020 by tcuvelier
+# New tags DocBookTagType, DocBookWrapperTagTagType,
+# DocBookItemWrapperTagTagType, DocBookItemTagTagType,
+# DocBookLabelTag
+
+# Incremented to format 85, 7 October 2020 by tcuvelier
+# New tags DocBookInnerTag, DocBookInnerAttr,
+# DocBookInnerTagType
+
+# Incremented to format 86, 20 October 2020 by tcuvelier
+# New tag DocBookSection.
+
+# Incremented to format 87, 2 November 2020 by rkh
+
+# Incremented to format 88, 28 November 2020 by tcuvelier
+# New tag DocBookNotInPara.
+
+# Incremented to format 89, 5 December 2020 by rkh
+# New tag LaTeXName for counters
+
+# Incremented to format 90, 11 December 2020 by spitz
+# Use semantic label colors
+
+# Incremented to format 91, 25 January 2021 by spitz
+# InputGlobal tag
+
+# Incremented to format 92, 30 January 2021 by spitz
+# Add ProvideInsetLayout and ModifyInsetLayout
+
+# Incremented to format 93, 13 February 2021 by spitz
+# Add DocBookNoFontInside
+
+# Incremented to format 94, 19 September 2021 by tcuvelier
+# Add DocBookFloatType, DocBookCaption
+
+# Incremented to format 95, 27 September 2021 by tcuvelier
+# Add DocBookRenderAsImage
+
+# Incremented to format 96, 4 December 2022 by rikiheck
+# Add HTMLInToc
+
+# Incremented to format 97, 4 December 2022 by rikiheck
+# Add HTMLClass
+
+# Incremented to format 98, 5 December 2022 by rikiheck
+# Add HTMLClass for InsetLayout
+
+# Incremented to format 99, 22 December 2022 by tcuvelier
+# Add DocBookGenerateTitle for Layout
+
+# Incremented to format 100, 9 May 2023 by forenr
+# Add inset label color
+
+# Incremented to format 101, 22 July 2023 by lasgouttes
+# add InsetLayout tag InheritFont
+
+# Incremented to format 102, 25 July 2023 by spitz
+# add InsetLayout tags AllowedInInsets, EndAllowedInInsets,
+# AllowedInLayouts, EndAllowedInLayouts
+
 # Do not forget to document format change in Customization
 # Manual (section "Declaring a new text class").
 
 # You might also want to consider running the
-# development/tools/updatelayouts.sh script to update all
+# development/tools/updatelayouts.py script to update all
 # layout files to the new format.
 
-currentFormat = 48
 
+import os, re, sys
+import argparse
 
-def usage(prog_name):
-    return ("Usage: %s inputfile outputfile\n" % prog_name +
-            "or     %s <inputfile >outputfile" % prog_name)
+# Provide support for both python 2 and 3
+# (copied from lyx2lyx)
+PY2 = sys.version_info[0] == 2
+if PY2:
+    # argparse returns strings in the commandline encoding, we need to convert.
+    # sys.getdefaultencoding() would not always be correct, see
+    # http://legacy.python.org/dev/peps/pep-0383/
+    def cmd_arg(arg):
+        return arg.decode(sys.getfilesystemencoding())
+else:
+    cmd_arg = str
+# End of code to support for both python 2 and 3
 
 
 def error(message):
@@ -184,7 +376,7 @@ def error(message):
 
 def trim_bom(line):
     " Remove byte order mark."
-    if line[0:3] == "\357\273\277":
+    if line[0:3] == b"\357\273\277":
         return line[3:]
     else:
         return line
@@ -199,17 +391,19 @@ def read(source):
 
 def write(output, lines):
     " Write output file with native lineendings."
-    output.write(os.linesep.join(lines) + os.linesep)
+    output.write(os.linesep.encode('ascii').join(lines)
+                 + os.linesep.encode('ascii'))
 
 
 # Concatenates old and new in an intelligent way:
 # If old is wrapped in ", they are stripped. The result is wrapped in ".
 def concatenate_label(old, new):
     # Don't use strip as long as we support python 1.5.2
-    if old[0] == '"':
-        return old[0:-1] + new + '"'
+    if old[0] == b'"':
+        return old[0:-1] + new + b'"'
     else:
-        return '"' + old + new + '"'
+        return b'"' + old + new + b'"'
+
 
 # appends a string to a list unless it's already there
 def addstring(s, l):
@@ -218,110 +412,118 @@ def addstring(s, l):
     l.append(s)
 
 
-def convert(lines):
+def convert(lines, end_format):
     " Convert to new format."
-    re_Comment = re.compile(r'^(\s*)#')
-    re_Counter = re.compile(r'\s*Counter\s*', re.IGNORECASE)
-    re_Name = re.compile(r'\s*Name\s+(\S+)\s*', re.IGNORECASE)
-    re_UseMod = re.compile(r'^\s*UseModule\s+(.*)', re.IGNORECASE)
-    re_Empty = re.compile(r'^(\s*)$')
-    re_Format = re.compile(r'^(\s*)(Format)(\s+)(\S+)', re.IGNORECASE)
-    re_Preamble = re.compile(r'^(\s*)Preamble', re.IGNORECASE)
-    re_EndPreamble = re.compile(r'^(\s*)EndPreamble', re.IGNORECASE)
-    re_LangPreamble = re.compile(r'^(\s*)LangPreamble', re.IGNORECASE)
-    re_EndLangPreamble = re.compile(r'^(\s*)EndLangPreamble', re.IGNORECASE)
-    re_BabelPreamble = re.compile(r'^(\s*)BabelPreamble', re.IGNORECASE)
-    re_EndBabelPreamble = re.compile(r'^(\s*)EndBabelPreamble', re.IGNORECASE)
-    re_MaxCounter = re.compile(r'^(\s*)(MaxCounter)(\s+)(\S+)', re.IGNORECASE)
-    re_LabelType = re.compile(r'^(\s*)(LabelType)(\s+)(\S+)', re.IGNORECASE)
-    re_LabelString = re.compile(r'^(\s*)(LabelString)(\s+)(("[^"]+")|(\S+))', re.IGNORECASE)
-    re_LabelStringAppendix = re.compile(r'^(\s*)(LabelStringAppendix)(\s+)(("[^"]+")|(\S+))', re.IGNORECASE)
-    re_LatexType = re.compile(r'^(\s*)(LatexType)(\s+)(\S+)', re.IGNORECASE)
-    re_Style = re.compile(r'^(\s*)(Style)(\s+)(\S+)', re.IGNORECASE)
-    re_CopyStyle = re.compile(r'^(\s*)(CopyStyle)(\s+)(\S+)', re.IGNORECASE)
-    re_NoStyle = re.compile(r'^(\s*)(NoStyle)(\s+)(\S+)', re.IGNORECASE)
-    re_End = re.compile(r'^(\s*)(End)(\s*)$', re.IGNORECASE)
-    re_Provides = re.compile(r'^(\s*)Provides(\S+)(\s+)(\S+)', re.IGNORECASE)
-    re_CharStyle = re.compile(r'^(\s*)CharStyle(\s+)(\S+)$', re.IGNORECASE)
-    re_CiteFormat = re.compile(r'^(\s*)(CiteFormat)(?:(\s*)()|(\s+)(default|authoryear|numerical))', re.IGNORECASE)
-    re_AMSMaths = re.compile(r'^\s*Input ams(?:math|def)s.inc\s*')
-    re_AMSMathsPlain = re.compile(r'^\s*Input amsmaths-plain.inc\s*')
-    re_AMSMathsSeq = re.compile(r'^\s*Input amsmaths-seq.inc\s*')
-    re_TocLevel = re.compile(r'^(\s*)(TocLevel)(\s+)(\S+)', re.IGNORECASE)
-    re_I18nPreamble = re.compile(r'^(\s*)I18nPreamble', re.IGNORECASE)
-    re_EndI18nPreamble = re.compile(r'^(\s*)EndI18nPreamble', re.IGNORECASE)
-    re_Float = re.compile(r'^\s*Float\s*$', re.IGNORECASE)
-    re_Type = re.compile(r'\s*Type\s+(\w+)', re.IGNORECASE)
-    re_Builtin = re.compile(r'^(\s*)LaTeXBuiltin\s+(\w*)', re.IGNORECASE)
-    re_True = re.compile(r'^\s*(?:true|1)\s*$', re.IGNORECASE)
-    re_InsetLayout = re.compile(r'^\s*InsetLayout\s+(?:Custom|CharStyle|Element):(\S+)\s*$', re.IGNORECASE)
+    re_Comment = re.compile(b'^(\\s*)#')
+    re_Counter = re.compile(b'\\s*Counter\\s*', re.IGNORECASE)
+    re_Name = re.compile(b'\\s*Name\\s+(\\S+)\\s*', re.IGNORECASE)
+    re_UseMod = re.compile(b'^\\s*UseModule\\s+(.*)', re.IGNORECASE)
+    re_Empty = re.compile(b'^(\\s*)$')
+    re_Format = re.compile(b'^(\\s*)(Format)(\\s+)(\\S+)', re.IGNORECASE)
+    re_Preamble = re.compile(b'^(\\s*)Preamble', re.IGNORECASE)
+    re_EndPreamble = re.compile(b'^(\\s*)EndPreamble', re.IGNORECASE)
+    re_LangPreamble = re.compile(b'^(\\s*)LangPreamble', re.IGNORECASE)
+    re_EndLangPreamble = re.compile(b'^(\\s*)EndLangPreamble', re.IGNORECASE)
+    re_BabelPreamble = re.compile(b'^(\\s*)BabelPreamble', re.IGNORECASE)
+    re_EndBabelPreamble = re.compile(b'^(\\s*)EndBabelPreamble', re.IGNORECASE)
+    re_MaxCounter = re.compile(b'^(\\s*)(MaxCounter)(\\s+)(\\S+)', re.IGNORECASE)
+    re_LabelType = re.compile(b'^(\\s*)(LabelType)(\\s+)(\\S+)', re.IGNORECASE)
+    re_LabelString = re.compile(b'^(\\s*)(LabelString)(\\s+)(("[^"]+")|(\\S+))', re.IGNORECASE)
+    re_LabelStringAppendix = re.compile(b'^(\\s*)(LabelStringAppendix)(\\s+)(("[^"]+")|(\\S+))', re.IGNORECASE)
+    re_LatexType = re.compile(b'^(\\s*)(LatexType)(\\s+)(\\S+)', re.IGNORECASE)
+    re_Style = re.compile(b'^(\\s*)(Style)(\\s+)(\\S+)', re.IGNORECASE)
+    re_IfStyle = re.compile(b'^(\\s*)IfStyle(\\s+\\S+)', re.IGNORECASE)
+    re_CopyStyle = re.compile(b'^(\\s*)(CopyStyle)(\\s+)(\\S+)', re.IGNORECASE)
+    re_NoStyle = re.compile(b'^(\\s*)(NoStyle)(\\s+)(\\S+)', re.IGNORECASE)
+    re_End = re.compile(b'^(\\s*)(End)(\\s*)$', re.IGNORECASE)
+    re_Provides = re.compile(b'^(\\s*)Provides(\\S+)(\\s+)(\\S+)', re.IGNORECASE)
+    re_CharStyle = re.compile(b'^(\\s*)CharStyle(\\s+)(\\S+)$', re.IGNORECASE)
+    re_CiteFormat = re.compile(b'^(\\s*)(CiteFormat)(?:(\\s*)()|(\\s+)(default|authoryear|numerical))', re.IGNORECASE)
+    re_AMSMaths = re.compile(b'^\\s*Input ams(?:math|def)s.inc\\s*')
+    re_AMSMathsPlain = re.compile(b'^\\s*Input amsmaths-plain.inc\\s*')
+    re_AMSMathsSeq = re.compile(b'^\\s*Input amsmaths-seq.inc\\s*')
+    re_TocLevel = re.compile(b'^(\\s*)(TocLevel)(\\s+)(\\S+)', re.IGNORECASE)
+    re_I18nPreamble = re.compile(b'^(\\s*)I18nPreamble', re.IGNORECASE)
+    re_EndI18nPreamble = re.compile(b'^(\\s*)EndI18nPreamble', re.IGNORECASE)
+    re_Float = re.compile(b'^\\s*Float\\s*$', re.IGNORECASE)
+    re_Type = re.compile(b'\\s*Type\\s+(\\w+)', re.IGNORECASE)
+    re_Builtin = re.compile(b'^(\\s*)LaTeXBuiltin\\s+(\\w*)', re.IGNORECASE)
+    re_True = re.compile(b'^\\s*(?:true|1)\\s*$', re.IGNORECASE)
+    re_InsetLayout = re.compile(b'^\\s*InsetLayout\\s+(?:Custom|CharStyle|Element):(\\S+)\\s*$', re.IGNORECASE)
+    re_ResetsFont = re.compile(b'^(\\s*)ResetsFont(\\s+)(\\S+)$', re.IGNORECASE)
     # with quotes
-    re_QInsetLayout = re.compile(r'^\s*InsetLayout\s+"(?:Custom|CharStyle|Element):([^"]+)"\s*$', re.IGNORECASE)
-    re_InsetLayout_CopyStyle = re.compile(r'^\s*CopyStyle\s+(?:Custom|CharStyle|Element):(\S+)\s*$', re.IGNORECASE)
-    re_QInsetLayout_CopyStyle = re.compile(r'^\s*CopyStyle\s+"(?:Custom|CharStyle|Element):([^"]+)"\s*$', re.IGNORECASE)
-    re_NeedsFloatPkg = re.compile(r'^(\s*)NeedsFloatPkg\s+(\w+)\s*$', re.IGNORECASE)
-    re_Fill = re.compile(r'^\s*Fill_(?:Top|Bottom).*$', re.IGNORECASE)
-    re_InsetLayout2 = re.compile(r'^\s*InsetLayout\s+(\S+)\s*$', re.IGNORECASE)
+    re_QInsetLayout = re.compile(b'^\\s*InsetLayout\\s+"(?:Custom|CharStyle|Element):([^"]+)"\\s*$', re.IGNORECASE)
+    re_InsetLayout_CopyStyle = re.compile(b'^\\s*CopyStyle\\s+(?:Custom|CharStyle|Element):(\\S+)\\s*$', re.IGNORECASE)
+    re_QInsetLayout_CopyStyle = re.compile(b'^\\s*CopyStyle\\s+"(?:Custom|CharStyle|Element):([^"]+)"\\s*$', re.IGNORECASE)
+    re_NeedsFloatPkg = re.compile(b'^(\\s*)NeedsFloatPkg\\s+(\\w+)\\s*$', re.IGNORECASE)
+    re_Fill = re.compile(b'^\\s*Fill_(?:Top|Bottom).*$', re.IGNORECASE)
+    re_InsetLayout2 = re.compile(b'^\\s*InsetLayout\\s+(\\S+)\\s*$', re.IGNORECASE)
     # with quotes
-    re_QInsetLayout2 = re.compile(r'^\s*InsetLayout\s+"([^"]+)"\s*$', re.IGNORECASE)
-    re_IsFlex = re.compile(r'\s*LyXType.*$', re.IGNORECASE)
-    re_CopyStyle2 = re.compile(r'(\s*CopyStyle\s+)"?([^"]+)"?\s*$')
+    re_QInsetLayout2 = re.compile(b'^\\s*InsetLayout\\s+"([^"]+)"\\s*$', re.IGNORECASE)
+    re_IsFlex = re.compile(b'\\s*LyXType.*$', re.IGNORECASE)
+    re_CopyStyle2 = re.compile(b'(\\s*CopyStyle\\s+)"?([^"]+)"?\\s*$')
+    re_Separator = re.compile(b'^(?:(-*)|(\\s*))(Separator|EndOfSlide)(?:(-*)|(\\s*))$', re.IGNORECASE)
     # for categories
-    re_Declaration = re.compile(r'^#\s*\\Declare\w+Class.*$')
-    re_ExtractCategory = re.compile(r'^(#\s*\\Declare\w+Class(?:\[[^]]*?\])?){([^(]+?)\s+\(([^)]+?)\)\s*}\s*$')
-    ConvDict = {"article": "Articles", "book" : "Books", "letter" : "Letters", "report": "Reports", \
-                "presentation" : "Presentations", "curriculum vitae" : "Curricula Vitae", "handout" : "Handouts"}
+    re_ExtractCategory = re.compile(b'^(#\\s*\\Declare\\w+Class(?:\\[[^]]*?\\])?){([^(]+?)\\s+\\(([^)]+?)\\)\\s*}\\s*$')
+    ConvDict = {b"article": b"Articles", b"book": b"Books", b"letter": b"Letters", b"report": b"Reports",
+                b"presentation": b"Presentations", b"curriculum vitae": b"Curricula Vitae", b"handout": b"Handouts"}
     # Arguments
-    re_OptArgs = re.compile(r'^(\s*)OptionalArgs(\s+)(\d+)\D*$', re.IGNORECASE)
-    re_ReqArgs = re.compile(r'^(\s*)RequiredArgs(\s+)(\d+)\D*$', re.IGNORECASE)
-    
-    # various changes associated with changing how chapters are handled
-    re_LabelTypeIsCounter = re.compile(r'^(\s*)LabelType(\s*)Counter\s*$', re.IGNORECASE)
-    re_TopEnvironment = re.compile(r'^(\s*)LabelType(\s+)Top_Environment\s*$', re.IGNORECASE)
-    re_CenteredEnvironment = re.compile(r'^(\s*)LabelType(\s+)Centered_Top_Environment\s*$', re.IGNORECASE)
-    re_ChapterStyle = re.compile(r'^\s*Style\s+Chapter\s*$', re.IGNORECASE)
-
+    re_OptArgs = re.compile(b'^(\\s*)OptionalArgs(\\s+)(\\d+)\\D*$', re.IGNORECASE)
+    re_ReqArgs = re.compile(b'^(\\s*)RequiredArgs(\\s+)(\\d+)\\D*$', re.IGNORECASE)
 
+    # various changes associated with changing how chapters are handled
+    re_LabelTypeIsCounter = re.compile(b'^(\\s*)LabelType(\\s*)Counter\\s*$', re.IGNORECASE)
+    re_TopEnvironment = re.compile(b'^(\\s*)LabelType(\\s+)Top_Environment\\s*$', re.IGNORECASE)
+    re_CenteredEnvironment = re.compile(b'^(\\s*)LabelType(\\s+)Centered_Top_Environment\\s*$', re.IGNORECASE)
+    re_ChapterStyle = re.compile(b'^\\s*Style\\s+Chapter\\s*$', re.IGNORECASE)
+    re_InsetLayout_CaptionLTNN = re.compile(b'^(\\s*InsetLayout\\s+)(Caption:LongTableNonumber)', re.IGNORECASE)
+    # for format 64
+    re_trimLabelString = re.compile(b'^(\\s*LabelString\\s+)"\\s*(.*?)\\s*"\\s*$')
+    re_trimLabelStringAppendix  = re.compile(b'^(\\s*LabelStringAppendix\\s+)"\\s*(.*?)\\s*"\\s*$')
+    re_trimEndLabelString = re.compile(b'^(\\s*EndLabelString\\s+)"\\s*(.*?)\\s*"\\s*$')
+    re_trimLabelCounter = re.compile(b'^(\\s*LabelCounter\\s+)"\\s*(.*?)\\s*"\\s*$')
+    # for format 100
+    re_InsetLayout100 = re.compile(b'^\\s*InsetLayout\\s+\\"?(Box|Float|Foot|Marginal|Listings|Note:Comment|Note:Greyedout|Tabular)(:\\S*)?\\"?\\s*$', re.IGNORECASE)
+    re_InheritFont = re.compile(b'^(\\s*)InheritFont(\\s+)(\\S+)$', re.IGNORECASE)
     # counters for sectioning styles (hardcoded in 1.3)
-    counters = {"part"          : "\\Roman{part}",
-                "chapter"       : "\\arabic{chapter}",
-                "section"       : "\\arabic{section}",
-                "subsection"    : "\\arabic{section}.\\arabic{subsection}",
-                "subsubsection" : "\\arabic{section}.\\arabic{subsection}.\\arabic{subsubsection}",
-                "paragraph"     : "\\arabic{section}.\\arabic{subsection}.\\arabic{subsubsection}.\\arabic{paragraph}",
-                "subparagraph"  : "\\arabic{section}.\\arabic{subsection}.\\arabic{subsubsection}.\\arabic{paragraph}.\\arabic{subparagraph}"}
+    counters = {b"part"          : b"\\Roman{part}",
+                b"chapter"       : b"\\arabic{chapter}",
+                b"section"       : b"\\arabic{section}",
+                b"subsection"    : b"\\arabic{section}.\\arabic{subsection}",
+                b"subsubsection" : b"\\arabic{section}.\\arabic{subsection}.\\arabic{subsubsection}",
+                b"paragraph"     : b"\\arabic{section}.\\arabic{subsection}.\\arabic{subsubsection}.\\arabic{paragraph}",
+                b"subparagraph"  : b"\\arabic{section}.\\arabic{subsection}.\\arabic{subsubsection}.\\arabic{paragraph}.\\arabic{subparagraph}"}
 
     # counters for sectioning styles in appendix (hardcoded in 1.3)
-    appendixcounters = {"chapter"       : "\\Alph{chapter}",
-                        "section"       : "\\Alph{section}",
-                        "subsection"    : "\\arabic{section}.\\arabic{subsection}",
-                        "subsubsection" : "\\arabic{section}.\\arabic{subsection}.\\arabic{subsubsection}",
-                        "paragraph"     : "\\arabic{section}.\\arabic{subsection}.\\arabic{subsubsection}.\\arabic{paragraph}",
-                        "subparagraph"  : "\\arabic{section}.\\arabic{subsection}.\\arabic{subsubsection}.\\arabic{paragraph}.\\arabic{subparagraph}"}
+    appendixcounters = {b"chapter"       : b"\\Alph{chapter}",
+                        b"section"       : b"\\Alph{section}",
+                        b"subsection"    : b"\\arabic{section}.\\arabic{subsection}",
+                        b"subsubsection" : b"\\arabic{section}.\\arabic{subsection}.\\arabic{subsubsection}",
+                        b"paragraph"     : b"\\arabic{section}.\\arabic{subsection}.\\arabic{subsubsection}.\\arabic{paragraph}",
+                        b"subparagraph"  : b"\\arabic{section}.\\arabic{subsection}.\\arabic{subsubsection}.\\arabic{paragraph}.\\arabic{subparagraph}"}
 
     # Value of TocLevel for sectioning styles
-    toclevels = {"part"          : -1,
-                 "chapter"       : 0,
-                 "section"       : 1,
-                 "subsection"    : 2,
-                 "subsubsection" : 3,
-                 "paragraph"     : 4,
-                 "subparagraph"  : 5}
+    toclevels = {b"part"          : -1,
+                 b"chapter"       : 0,
+                 b"section"       : 1,
+                 b"subsection"    : 2,
+                 b"subsubsection" : 3,
+                 b"paragraph"     : 4,
+                 b"subparagraph"  : 5}
 
     i = 0
     only_comment = 1
-    counter = ""
-    toclevel = ""
-    label = ""
-    labelstring = ""
-    labelstringappendix = ""
-    space1 = ""
+    counter = b""
+    toclevel = b""
+    label = b""
+    labelstring = b""
+    space1 = b""
     labelstring_line = -1
     labelstringappendix_line = -1
     labeltype_line = -1
-    latextype = ""
+    latextype = b""
     latextype_line = -1
-    style = ""
+    style = b""
     maxcounter = 0
     format = 1
     formatline = 0
@@ -330,42 +532,45 @@ def convert(lines):
     opts = 0
     reqs = 0
     inchapter = False
+    # Whether a style is inherited (works only for CopyStyle currently,
+    # not for true inherited styles, see bug 8920
+    inherited = False        # only used for 48 -> 49
 
     while i < len(lines):
         # Skip comments and empty lines
         if (re_Comment.match(lines[i]) or re_Empty.match(lines[i])):
-          # We need to deal with this conversion here, because it happens
-          # inside the initial comment block.
-          if only_comment and format == 39:
-              match = re_ExtractCategory.match(lines[i])
-              if match:
-                  lpre = match.group(1)
-                  lcat = match.group(2)
-                  lnam = match.group(3)
-                  if lcat in ConvDict:
-                      lcat = ConvDict[lcat]
-                  lines[i] = lpre + "{" + lnam + "}"
-                  lines.insert(i+1, "#  \\DeclareCategory{" + lcat + "}")
-                  i += 1 
-          i += 1
-          continue
+            # We need to deal with this conversion here, because it happens
+            # inside the initial comment block.
+            if only_comment and format == 39:
+                match = re_ExtractCategory.match(lines[i])
+                if match:
+                    lpre = match.group(1)
+                    lcat = match.group(2)
+                    lnam = match.group(3)
+                    if lcat in ConvDict:
+                        lcat = ConvDict[lcat]
+                    lines[i] = lpre + b"{" + lnam + b"}"
+                    lines.insert(i+1, b"#  \\DeclareCategory{" + lcat + b"}")
+                    i += 1
+            i += 1
+            continue
 
         # insert file format if not already there
-        if (only_comment):
+        if only_comment:
             match = re_Format.match(lines[i])
             if match:
                 formatline = i
                 format = int(match.group(4))
-                if format > 1 and format < currentFormat:
-                    lines[i] = "Format %d" % (format + 1)
+                if 1 < format < end_format:
+                    lines[i] = b"Format %d" % (format + 1)
                     only_comment = 0
-                elif format == currentFormat:
+                elif format == end_format:
                     # nothing to do
                     return format
                 else:
-                    error('Cannot convert file format %s to %s' % (format, currentFormat))
+                    error('Cannot convert file format %s to %s' % (format, end_format))
             else:
-                lines.insert(i, "Format 2")
+                lines.insert(i, b"Format 2")
                 only_comment = 0
                 continue
 
@@ -386,45 +591,265 @@ def convert(lines):
                 i += 1
             continue
 
-        if format >= 44 and format <= 47:
+        if format == 101:
             # nothing to do.
             i += 1
             continue
 
-        if format == 43:
-          match = re_LabelTypeIsCounter.match(lines[i])
-          if match:
-            if inchapter:
-             lines[i] = match.group(1) + "LabelType" + match.group(2) + "Above"              
-            else:
-              lines[i] = match.group(1) + "LabelType" + match.group(2) + "Static"
+        if format == 100:
+            # InheritFont has been introduced and defaults to true. Some insets had
+            # an hardcoded inheritFont') method returning true. We removed them, so
+            # we want to introduce the correct tag if it is not already there.
+            match = re_InsetLayout100.match(lines[i])
+            if not match:
+                i += 1
+                continue
+
+            inheritfont_found = False
+            inherited = False
+            while i < len(lines):
+                match = re_InheritFont.match(lines[i])
+                if match:
+                    inheritfont_found = True
+                else:
+                    match = re_CopyStyle.match(lines[i])
+                    if match:
+                        inherited = True
+                    else:
+                        match = re_End.match(lines[i])
+                        if match:
+                            break
+                i += 1
+            if not inheritfont_found and not inherited:
+                lines.insert(i, b"\tInheritFont false")
+
+            continue
+
+        if 87 <= format <= 99:
+            # nothing to do.
+            i += 1
+            continue
+
+        if format == 86:
+            if lines[i].lstrip().lower().startswith(b"stepmastercounter"):
+                pattern = re.compile(b"stepmastercounter", re.IGNORECASE)
+                lines[i] = pattern.sub(b"StepParentCounter", lines[i])
+            i += 1
+            continue
+
+        if 82 <= format <= 85:
+            # nothing to do.
+            i += 1
+            continue
+
+        if format == 81:
+            match = re.compile(b'^(\\s*Header\\s+)("?\\w+"?)', re.IGNORECASE).match(lines[i])
+            if match:
+                del lines[i]
+                continue
+
+            match = re.compile(b'(\\s*LyXType\\s+)(\\w+)(\\s*Element\\s+)', re.IGNORECASE).match(lines[i])
+            if match:
+                del lines[i]
+                continue
+
+            i += 1
+            continue
 
-          match = re_TopEnvironment.match(lines[i])
-          if match:
-            lines[i] = match.group(1) + "LabelType" + match.group(2) + "Above"
+        if 65 <= format <= 80:
+            # nothing to do.
+            i += 1
+            continue
 
-          match = re_CenteredEnvironment.match(lines[i])
-          if match:
-            lines[i] = match.group(1) + "LabelType" + match.group(2) + "Centered"
+        if format == 64:
+            match = re.compile(b'(\\s*Color\\s+)(\\w+)', re.IGNORECASE).match(lines[i])
+            if not match:
+                i += 1
+                continue
+            col  = match.group(2)
+            if col == "collapsable":
+                lines[i] = match.group(1) + b"collapsible"
+            i += 1
+            continue
 
-          if inchapter:
+        if format == 63:
+            for r in (re_trimLabelString, re_trimLabelStringAppendix,\
+              re_trimEndLabelString, re_trimLabelCounter):
+                m = r.match(lines[i])
+                if m:
+                    lines[i] = m.group(1) + b'"' + m.group(2) + b'"'
+            i += 1
+            continue
+
+        if 60 <= format <= 62:
+            # nothing to do.
+            i += 1
+            continue
+
+        if format == 59:
+            match = re_InsetLayout_CaptionLTNN.match(lines[i])
+            if not match:
+                i += 1
+                continue
+            # '^(\s*InsetLayout\s+)(Caption:LongTableNonumber)'
+            lead  = match.group(1)
+            lines[i] = lead + b"Caption:Unnumbered"
+            i += 1
+            continue
+
+        if format == 58:
+            # nothing to do.
+            i += 1
+            continue
+
+        if format == 57:
+            match = re_IfStyle.match(lines[i])
+            if not match:
+                i += 1
+                continue
+            # b'^(\\s*)IfStyle(\\s+\\S+)
+            lead  = match.group(1)
+            trail = match.group(2)
+            lines[i] = lead + b"ModifyStyle" + trail
+            i += 1
+            continue
+
+        if 50 <= format <= 56:
+            # nothing to do.
+            i += 1
+            continue
+
+        if format == 49:
+            separator = []
+
+            # delete separator styles
             match = re_Style.match(lines[i])
             if match:
-              inchapter = False
-          else:
-            match = re_ChapterStyle.match(lines[i])
+                style = match.group(4).lower()
+                if re_Separator.match(style):
+                    del lines[i]
+                    while i < len(lines) and not re_End.match(lines[i]):
+                        separator.append(lines[i])
+                        del lines[i]
+                    if i == len(lines):
+                        error('Incomplete separator style.')
+                    else:
+                        del lines[i]
+                        continue
+
+            # delete undefinition of separator styles
+            match = re_NoStyle.match(lines[i])
             if match:
-              inchapter = True
+                style = match.group(4).lower()
+                if re_Separator.match(style):
+                    del lines[i]
+                    continue
 
-          i += 1
-          continue
+            # replace the CopyStyle statement with the definition of the real
+            # style. This may result in duplicate statements, but that is OK
+            # since the second one will overwrite the first one.
+            match = re_CopyStyle.match(lines[i])
+            if match:
+                style = match.group(4).lower()
+                if re_Separator.match(style):
+                    if len(separator) > 0:
+                        lines[i:i+1] = separator
+                    else:
+                        # FIXME: If this style was redefined in an include file,
+                        # we should replace the real style and not this default.
+                        lines[i:i+1] = [b'     Category              MainText',
+                                        b'     KeepEmpty             1',
+                                        b'     Margin                Dynamic',
+                                        b'     LatexType             Paragraph',
+                                        b'     LatexName             dummy',
+                                        b'     ParIndent             MM',
+                                        b'     Align                 Block',
+                                        b'     LabelType             Static',
+                                        b'     LabelString           "--- Separate Environment ---"',
+                                        b'     LabelFont',
+                                        b'       Family              Roman',
+                                        b'       Series              Medium',
+                                        b'       Size                Normal',
+                                        b'       Color               Blue',
+                                        b'     EndFont',
+                                        b'     HTMLLabel             NONE']
+            i += 1
+            continue
+
+        if format == 48:
+            # The default of ResetsFont in LyX changed from true to false,
+            # because it is now used for all InsetLayouts, not only flex ones.
+            # Therefore, we need to set it to true for all flex insets which do
+            # not already have a ResetsFont.
+            match = re_InsetLayout2.match(lines[i])
+            if not match:
+                i += 1
+                continue
+
+            name = match.group(1).lower()
+            if name != b"flex" and name != b"\"flex\"" and name[0:5] != b"flex:" and name [0:6] != b"\"flex:":
+                i += 1
+                continue
+
+            resetsfont_found = False
+            inherited = False
+            while i < len(lines):
+                match = re_ResetsFont.match(lines[i])
+                if match:
+                    resetsfont_found = True
+                else:
+                    match = re_CopyStyle.match(lines[i])
+                    if match:
+                        inherited = True
+                    else:
+                        match = re_End.match(lines[i])
+                        if match:
+                            break
+                i += 1
+            if not resetsfont_found and not inherited:
+                lines.insert(i, b"\tResetsFont true")
+
+            continue
+
+        if 44 <= format <= 47:
+            # nothing to do.
+            i += 1
+            continue
+
+        if format == 43:
+            match = re_LabelTypeIsCounter.match(lines[i])
+            if match:
+                if inchapter:
+                   lines[i] = match.group(1) + b"LabelType" + match.group(2) + b"Above"
+                else:
+                   lines[i] = match.group(1) + b"LabelType" + match.group(2) + b"Static"
+
+            match = re_TopEnvironment.match(lines[i])
+            if match:
+                lines[i] = match.group(1) + b"LabelType" + match.group(2) + b"Above"
+
+            match = re_CenteredEnvironment.match(lines[i])
+            if match:
+                lines[i] = match.group(1) + b"LabelType" + match.group(2) + b"Centered"
+
+            if inchapter:
+                match = re_Style.match(lines[i])
+                if match:
+                    inchapter = False
+            else:
+                match = re_ChapterStyle.match(lines[i])
+                if match:
+                    inchapter = True
+
+            i += 1
+            continue
 
         if format == 42:
-          if lines[i] == "InsetLayout Caption":
-            lines[i] = "InsetLayout Caption:Standard"
-          i += 1
-          continue
-        
+            if lines[i] == b"InsetLayout Caption":
+                lines[i] = b"InsetLayout Caption:Standard"
+            i += 1
+            continue
+
         if format == 41:
             # nothing to do.
             i += 1
@@ -445,7 +870,7 @@ def convert(lines):
                 opts = int(match.group(3))
                 # OptionalArgs 0 > ResetArgs 1
                 if opts == 0:
-                    lines[i] = space1 + "ResetArgs\t1"
+                    lines[i] = space1 + b"ResetArgs\t1"
                     i += 1
                 else:
                     del lines[i]
@@ -460,32 +885,32 @@ def convert(lines):
             # Insert the required number of arguments at the end of the style definition
             match = re_End.match(lines[i])
             if match:
-                newarg = ['']
+                newarg = [b'']
                 # First the optionals (this is the required order pre 2.1)
                 if opts > 0:
                     if opts == 1:
-                        newarg = [ '%sArgument 1' % (space1),
-                                   '%s\tLabelString\t\"Optional Layout Argument\"' % (space1),
-                                   '%sEndArgument' % (space1)]
+                        newarg = [ b'%sArgument 1' % (space1),
+                                   b'%s\tLabelString\t\"Optional Layout Argument\"' % (space1),
+                                   b'%sEndArgument' % (space1)]
                     elif opts > 1:
                         actopt = 1
                         while actopt < (opts + 1):
-                            newarg += [ '%sArgument %d' % (space1, actopt),
-                               '%s\tLabelString\t\"Optional Layout Argument %d\"' % (space1, actopt),
-                               '%sEndArgument' % (space1)]
+                            newarg += [ b'%sArgument %d' % (space1, actopt),
+                               b'%s\tLabelString\t\"Optional Layout Argument %d\"' % (space1, actopt),
+                               b'%sEndArgument' % (space1)]
                             actopt += 1
                 # Now the mandatories
                 if reqs > 0:
                     actopt = opts + 1
-                    while actopt < (opts +  reqs + 1):
-                        newarg += [ '%sArgument %d' % (space1, actopt),
-                           '%s\tLabelString\t"Required Layout Argument %d"' % (space1, actopt - opts),
-                           '%s\tMandatory\t1' % (space1),
-                           '%sEndArgument' % (space1)]
+                    while actopt < opts + reqs + 1:
+                        newarg += [ b'%sArgument %d' % (space1, actopt),
+                           b'%s\tLabelString\t"Required Layout Argument %d"' % (space1, actopt - opts),
+                           b'%s\tMandatory\t1' % (space1),
+                           b'%sEndArgument' % (space1)]
                         actopt += 1
                 # Since we replace the "End" line, re-add this line
                 if len(newarg) > 1:
-                    newarg += ['End']
+                    newarg += [b'End']
                     lines[i:i+1] = newarg
                     i += len(newarg)
                 # Reset the counters
@@ -493,7 +918,7 @@ def convert(lines):
                 reqs = 0
             i += 1
             continue
-        
+
         if format == 39:
             # There is a conversion with format 40, but it is done within the
             # initial comment block and so is above.
@@ -505,173 +930,173 @@ def convert(lines):
             continue
 
         if format == 36:
-            match = re_CiteFormat.match(lines[i]);
-            if match and match.group(4) == "":
-                lines[i] = match.group(0) + " default"
+            match = re_CiteFormat.match(lines[i])
+            if match and match.group(4) == b"":
+                lines[i] = match.group(0) + b" default"
             i += 1
             continue
 
         if format == 35:
-          i += 1
-          continue
+            i += 1
+            continue
 
         if format == 34:
-          match = re_QInsetLayout2.match(lines[i])
-          if not match:
-            match = re_InsetLayout2.match(lines[i])
-          if not match:
-            match = re_CopyStyle2.match(lines[i])
+            match = re_QInsetLayout2.match(lines[i])
             if not match:
-              i += 1
-              continue
-            style = match.group(2)
-            
-            if flexstyles.count(style):
-              lines[i] = match.group(1) + "\"Flex:" + style + "\""
-            i += 1
-            continue
+                match = re_InsetLayout2.match(lines[i])
+            if not match:
+                match = re_CopyStyle2.match(lines[i])
+                if not match:
+                    i += 1
+                    continue
+                style = match.group(2)
 
-          name = match.group(1)
-          names = name.split(":", 1)
-          if len(names) > 1 and names[0] == "Flex":
-            i += 1
-            continue
+                if flexstyles.count(style):
+                    lines[i] = match.group(1) + b"\"Flex:" + style + b"\""
+                i += 1
+                continue
 
-          isflex = False
-          for j in range(i + 1, len(lines)):
-            if re_IsFlex.match(lines[j]):
-              isflex = True
-              break
-            if re_End.match(lines[j]):
-              break
+            name = match.group(1)
+            names = name.split(b":", 1)
+            if len(names) > 1 and names[0] == b"Flex":
+                i += 1
+                continue
 
-          if isflex:
-            flexstyles.append(name)
-            lines[i] = "InsetLayout \"Flex:" + name + "\""
+            isflex = False
+            for j in range(i + 1, len(lines)):
+                if re_IsFlex.match(lines[j]):
+                    isflex = True
+                    break
+                if re_End.match(lines[j]):
+                    break
 
-          i += 1
-          continue
+            if isflex:
+                flexstyles.append(name)
+                lines[i] = b"InsetLayout \"Flex:" + name + b"\""
+
+            i += 1
+            continue
 
         if format == 33:
-          m = re_Fill.match(lines[i])
-          if m:
-            lines[i] = ""
-          i += 1
-          continue
+            m = re_Fill.match(lines[i])
+            if m:
+                lines[i] = b""
+            i += 1
+            continue
 
         if format == 32:
-          match = re_NeedsFloatPkg.match(lines[i])
-          if match:
-            space = match.group(1)
-            val = match.group(2)
-            lines[i] = space + "UsesFloatPkg " + val
-            newval = 'true'
-            if val == '1' or val.lower() == 'true':
-              newval = 'false'
-            lines.insert(i, space + "IsPredefined " + newval)
+            match = re_NeedsFloatPkg.match(lines[i])
+            if match:
+                space = match.group(1)
+                val = match.group(2)
+                lines[i] = space + b"UsesFloatPkg " + val
+                newval = b'true'
+                if val == b'1' or val.lower() == b'true':
+                    newval = b'false'
+                lines.insert(i, space + b"IsPredefined " + newval)
+                i += 1
             i += 1
-          i += 1
-          continue
+            continue
 
         # Only new features
-        if format >= 29 and format <= 31:
-          i += 1
-          continue
+        if 29 <= format <= 31:
+            i += 1
+            continue
 
         if format == 28:
-          match = re_InsetLayout.match(lines[i])
-          if match:
-            lines[i] = "InsetLayout Flex:" + match.group(1)
-          else:
-            match = re_QInsetLayout.match(lines[i])
+            match = re_InsetLayout.match(lines[i])
             if match:
-              lines[i] = "InsetLayout \"Flex:" + match.group(1) + "\""
+                lines[i] = b"InsetLayout Flex:" + match.group(1)
             else:
-              match = re_InsetLayout_CopyStyle.match(lines[i])
-              if match:
-                lines[i] = "\tCopyStyle Flex:" + match.group(1)
-              else:
-                match = re_QInsetLayout_CopyStyle.match(lines[i])
+                match = re_QInsetLayout.match(lines[i])
                 if match:
-                  lines[i] = "\tCopyStyle \"Flex:" + match.group(1) + "\""
-          i += 1
-          continue
-        
+                    lines[i] = b"InsetLayout \"Flex:" + match.group(1) + b"\""
+                else:
+                    match = re_InsetLayout_CopyStyle.match(lines[i])
+                    if match:
+                        lines[i] = b"\tCopyStyle Flex:" + match.group(1)
+                    else:
+                        match = re_QInsetLayout_CopyStyle.match(lines[i])
+                        if match:
+                            lines[i] = b"\tCopyStyle \"Flex:" + match.group(1) + b"\""
+            i += 1
+            continue
+
         # Only new features
-        if format >= 24 and format <= 27:
-          i += 1
-          continue
+        if 24 <= format <= 27:
+            i += 1
+            continue
 
         if format == 23:
-          match = re_Float.match(lines[i])
-          i += 1
-          if not match:
-            continue
-          # we need to do two things:
-          # (i)  Convert Builtin to NeedsFloatPkg
-          # (ii) Write ListCommand lines for the builtin floats table and figure
-          builtin = False
-          cmd = ""
-          while True and i < len(lines):
-            m1 = re_End.match(lines[i])
-            if m1:
-              if builtin and cmd:
-                line = "    ListCommand " + cmd
-                lines.insert(i, line)
+            match = re_Float.match(lines[i])
+            i += 1
+            if not match:
+                continue
+            # we need to do two things:
+            # (i)  Convert Builtin to NeedsFloatPkg
+            # (ii) Write ListCommand lines for the builtin floats table and figure
+            builtin = False
+            cmd = b""
+            while True and i < len(lines):
+                m1 = re_End.match(lines[i])
+                if m1:
+                    if builtin and cmd:
+                        line = b"    ListCommand " + cmd
+                        lines.insert(i, line)
+                        i += 1
+                    break
+                m2 = re_Builtin.match(lines[i])
+                if m2:
+                    builtin = True
+                    ws1 = m2.group(1)
+                    arg = m2.group(2)
+                    newarg = b""
+                    if re_True.match(arg):
+                        newarg = b"false"
+                    else:
+                        newarg = b"true"
+                    lines[i] = ws1 + b"NeedsFloatPkg " + newarg
+                m3 = re_Type.match(lines[i])
+                if m3:
+                    fltype = m3.group(1)
+                    fltype = fltype.lower()
+                    if fltype == b"table":
+                        cmd = b"listoftables"
+                    elif fltype == b"figure":
+                        cmd = b"listoffigures"
+                    # else unknown, which is why we're doing this
                 i += 1
-              break
-            m2 = re_Builtin.match(lines[i])
-            if m2:
-              builtin = True
-              ws1 = m2.group(1)
-              arg = m2.group(2)
-              newarg = ""
-              if re_True.match(arg):
-                newarg = "false"
-              else:
-                newarg = "true"
-              lines[i] = ws1 + "NeedsFloatPkg " + newarg
-            m3 = re_Type.match(lines[i])
-            if m3:
-              fltype = m3.group(1)
-              fltype = fltype.lower()
-              if fltype == "table":
-                cmd = "listoftables"
-              elif fltype == "figure":
-                cmd = "listoffigures"
-              # else unknown, which is why we're doing this
-            i += 1
-          continue              
-          
+            continue
+
         # This just involved new features, not any changes to old ones
-        if format >= 14 and format <= 22:
-          i += 1
-          continue
+        if 14 <= format <= 22:
+            i += 1
+            continue
 
         # Rename I18NPreamble to BabelPreamble
         if format == 13:
             match = re_I18nPreamble.match(lines[i])
             if match:
-                lines[i] = match.group(1) + "BabelPreamble"
+                lines[i] = match.group(1) + b"BabelPreamble"
                 i += 1
                 match = re_EndI18nPreamble.match(lines[i])
                 while i < len(lines) and not match:
                     i += 1
                     match = re_EndI18nPreamble.match(lines[i])
-                lines[i] = match.group(1) + "EndBabelPreamble"
+                lines[i] = match.group(1) + b"EndBabelPreamble"
                 i += 1
                 continue
 
         # These just involved new features, not any changes to old ones
         if format == 11 or format == 12:
-          i += 1
-          continue
+            i += 1
+            continue
 
         if format == 10:
             match = re_UseMod.match(lines[i])
             if match:
                 module = match.group(1)
-                lines[i] = "DefaultModule " + module
+                lines[i] = b"DefaultModule " + module
             i += 1
             continue
 
@@ -685,7 +1110,7 @@ def convert(lines):
                     if namem:
                         name = namem.group(1)
                         lines.pop(i)
-                        lines[counterline] = "Counter %s" % name
+                        lines[counterline] = b"Counter %s" % name
                         # we don't need to increment i
                         continue
                     endem = re_End.match(lines[i])
@@ -701,27 +1126,27 @@ def convert(lines):
             # add corresponding UseModule tags to the layout.
             match = re_AMSMaths.match(lines[i])
             if match:
-                addstring("theorems-ams", usemodules)
-                addstring("theorems-ams-extended", usemodules)
-                addstring("theorems-sec", usemodules)
+                addstring(b"theorems-ams", usemodules)
+                addstring(b"theorems-ams-extended", usemodules)
+                addstring(b"theorems-sec", usemodules)
                 lines.pop(i)
                 continue
             match = re_AMSMathsPlain.match(lines[i])
             if match:
-                addstring("theorems-starred", usemodules)
+                addstring(b"theorems-starred", usemodules)
                 lines.pop(i)
                 continue
             match = re_AMSMathsSeq.match(lines[i])
             if match:
-                addstring("theorems-ams", usemodules)
-                addstring("theorems-ams-extended", usemodules)
+                addstring(b"theorems-ams", usemodules)
+                addstring(b"theorems-ams-extended", usemodules)
                 lines.pop(i)
                 continue
             i += 1
             continue
 
         # These just involved new features, not any changes to old ones
-        if format >= 5 and format <= 7:
+        if 5 <= format <= 7:
           i += 1
           continue
 
@@ -729,12 +1154,12 @@ def convert(lines):
             # Handle conversion to long CharStyle names
             match = re_CharStyle.match(lines[i])
             if match:
-                lines[i] = "InsetLayout CharStyle:%s" % (match.group(3))
+                lines[i] = b"InsetLayout CharStyle:%s" % (match.group(3))
                 i += 1
-                lines.insert(i, "\tLyXType charstyle")
+                lines.insert(i, b"\tLyXType charstyle")
                 i += 1
-                lines.insert(i, "")
-                lines[i] = "\tLabelString %s" % (match.group(3))
+                lines.insert(i, b"")
+                lines[i] = b"\tLabelString %s" % (match.group(3))
             i += 1
             continue
 
@@ -744,7 +1169,7 @@ def convert(lines):
             # x is either 0 or 1
             match = re_Provides.match(lines[i])
             if match:
-                lines[i] = "%sProvides %s%s%s" % (match.group(1), match.group(2).lower(),
+                lines[i] = b"%sProvides %s%s%s" % (match.group(1), match.group(2).lower(),
                                                   match.group(3), match.group(4))
             i += 1
             continue
@@ -755,8 +1180,8 @@ def convert(lines):
             # delete caption styles
             match = re_Style.match(lines[i])
             if match:
-                style = string.lower(match.group(4))
-                if style == "caption":
+                style = match.group(4).lower()
+                if style == b"caption":
                     del lines[i]
                     while i < len(lines) and not re_End.match(lines[i]):
                         caption.append(lines[i])
@@ -770,8 +1195,8 @@ def convert(lines):
             # delete undefinition of caption styles
             match = re_NoStyle.match(lines[i])
             if match:
-                style = string.lower(match.group(4))
-                if style == "caption":
+                style = match.group(4).lower()
+                if style == b"caption":
                     del lines[i]
                     continue
 
@@ -780,28 +1205,28 @@ def convert(lines):
             # since the second one will overwrite the first one.
             match = re_CopyStyle.match(lines[i])
             if match:
-                style = string.lower(match.group(4))
-                if style == "caption":
+                style = match.group(4).lower()
+                if style == b"caption":
                     if len(caption) > 0:
                         lines[i:i+1] = caption
                     else:
                         # FIXME: This style comes from an include file, we
                         # should replace the real style and not this default.
-                        lines[i:i+1] = [     Margin                First_Dynamic',
-                                             LatexType             Command',
-                                             LatexName             caption',
-                                             NeedProtect           1',
-                                             LabelSep              xx',
-                                             ParSkip               0.4',
-                                             TopSep                0.5',
-                                             Align                 Center',
-                                             AlignPossible         Center',
-                                             LabelType             Sensitive',
-                                             LabelString           "Senseless!"',
-                                             OptionalArgs          1',
-                                             LabelFont',
-                                               Series              Bold',
-                                             EndFont']
+                        lines[i:i+1] = [b'     Margin                First_Dynamic',
+                                        b'     LatexType             Command',
+                                        b'     LatexName             caption',
+                                        b'     NeedProtect           1',
+                                        b'     LabelSep              xx',
+                                        b'     ParSkip               0.4',
+                                        b'     TopSep                0.5',
+                                        b'     Align                 Center',
+                                        b'     AlignPossible         Center',
+                                        b'     LabelType             Sensitive',
+                                        b'     LabelString           "Senseless!"',
+                                        b'     OptionalArgs          1',
+                                        b'     LabelFont',
+                                        b'       Series              Bold',
+                                        b'     EndFont']
 
             i += 1
             continue
@@ -809,24 +1234,24 @@ def convert(lines):
         # Delete MaxCounter and remember the value of it
         match = re_MaxCounter.match(lines[i])
         if match:
-            level = match.group(4)
-            if string.lower(level) == "counter_chapter":
+            level = match.group(4).lower()
+            if level == b"counter_chapter":
                 maxcounter = 0
-            elif string.lower(level) == "counter_section":
+            elif level == b"counter_section":
                 maxcounter = 1
-            elif string.lower(level) == "counter_subsection":
+            elif level == b"counter_subsection":
                 maxcounter = 2
-            elif string.lower(level) == "counter_subsubsection":
+            elif level == b"counter_subsubsection":
                 maxcounter = 3
-            elif string.lower(level) == "counter_paragraph":
+            elif level == b"counter_paragraph":
                 maxcounter = 4
-            elif string.lower(level) == "counter_subparagraph":
+            elif level == b"counter_subparagraph":
                 maxcounter = 5
-            elif string.lower(level) == "counter_enumi":
+            elif level == b"counter_enumi":
                 maxcounter = 6
-            elif string.lower(level) == "counter_enumii":
+            elif level == b"counter_enumii":
                 maxcounter = 7
-            elif string.lower(level) == "counter_enumiii":
+            elif level == b"counter_enumiii":
                 maxcounter = 8
             del lines[i]
             continue
@@ -848,9 +1273,9 @@ def convert(lines):
             # Remember the line for adding the LabelCounter later.
             # We can't do it here because it could shift latextype_line etc.
             labeltype_line = i
-            if string.lower(label[:8]) == "counter_":
-                counter = string.lower(label[8:])
-                lines[i] = re_LabelType.sub(r'\1\2\3Counter', lines[i])
+            if label[:8].lower() == b"counter_":
+                counter = label[8:].lower()
+                lines[i] = re_LabelType.sub(b'\\1\\2\\3Counter', lines[i])
 
         # Remember the LabelString line
         match = re_LabelString.match(lines[i])
@@ -861,56 +1286,54 @@ def convert(lines):
         # Remember the LabelStringAppendix line
         match = re_LabelStringAppendix.match(lines[i])
         if match:
-            labelstringappendix = match.group(4)
             labelstringappendix_line = i
 
         # Remember the LatexType line
         match = re_LatexType.match(lines[i])
         if match:
-            latextype = string.lower(match.group(4))
+            latextype = match.group(4).lower()
             latextype_line = i
 
         # Remember the TocLevel line
         match = re_TocLevel.match(lines[i])
         if match:
-            toclevel = string.lower(match.group(4))
+            toclevel = match.group(4).lower()
 
         # Reset variables at the beginning of a style definition
         match = re_Style.match(lines[i])
         if match:
-            style = string.lower(match.group(4))
-            counter = ""
-            toclevel = ""
-            label = ""
-            space1 = ""
-            labelstring = ""
-            labelstringappendix = ""
+            style = match.group(4).lower()
+            counter = b""
+            toclevel = b""
+            label = b""
+            space1 = b""
+            labelstring = b""
             labelstring_line = -1
             labelstringappendix_line = -1
             labeltype_line = -1
-            latextype = ""
+            latextype = b""
             latextype_line = -1
 
         if re_End.match(lines[i]):
 
             # Add a line "LatexType Bib_Environment" if LabelType is Bibliography
             # (or change the existing LatexType)
-            if string.lower(label) == "bibliography":
+            if label.lower() == b"bibliography":
                 if (latextype_line < 0):
-                    lines.insert(i, "%sLatexType Bib_Environment" % space1)
+                    lines.insert(i, b"%sLatexType Bib_Environment" % space1)
                     i += 1
                 else:
-                    lines[latextype_line] = re_LatexType.sub(r'\1\2\3Bib_Environment', lines[latextype_line])
+                    lines[latextype_line] = re_LatexType.sub(b'\\1\\2\\3Bib_Environment', lines[latextype_line])
 
             # Change "LabelType Static" to "LabelType Itemize" for itemize environments
-            if latextype == "item_environment" and string.lower(label) == "static":
-                lines[labeltype_line] = re_LabelType.sub(r'\1\2\3Itemize', lines[labeltype_line])
+            if latextype == b"item_environment" and label.lower() == b"static":
+                lines[labeltype_line] = re_LabelType.sub(b'\\1\\2\\3Itemize', lines[labeltype_line])
 
             # Change "LabelType Counter_EnumI" to "LabelType Enumerate" for enumerate environments
-            if latextype == "item_environment" and string.lower(label) == "counter_enumi":
-                lines[labeltype_line] = re_LabelType.sub(r'\1\2\3Enumerate', lines[labeltype_line])
+            if latextype == b"item_environment" and label.lower() == b"counter_enumi":
+                lines[labeltype_line] = re_LabelType.sub(b'\\1\\2\\3Enumerate', lines[labeltype_line])
                 # Don't add the LabelCounter line later
-                counter = ""
+                counter = b""
 
             # Replace
             #
@@ -923,70 +1346,90 @@ def convert(lines):
             # if this style has a counter. Ditto for LabelStringAppendix.
             # This emulates the hardcoded article style numbering of 1.3
             #
-            if counter != "":
+            if counter != b"":
                 if style in counters:
                     if labelstring_line < 0:
-                        lines.insert(i, '%sLabelString "%s"' % (space1, counters[style]))
+                        lines.insert(i, b'%sLabelString "%s"' % (space1, counters[style]))
                         i += 1
                     else:
                         new_labelstring = concatenate_label(labelstring, counters[style])
                         lines[labelstring_line] = re_LabelString.sub(
-                                r'\1\2\3%s' % new_labelstring.replace("\\", "\\\\"),
+                                b'\\1\\2\\3%s' % new_labelstring.replace(b"\\", b"\\\\"),
                                 lines[labelstring_line])
                 if style in appendixcounters:
                     if labelstringappendix_line < 0:
-                        lines.insert(i, '%sLabelStringAppendix "%s"' % (space1, appendixcounters[style]))
+                        lines.insert(i, b'%sLabelStringAppendix "%s"' % (space1, appendixcounters[style]))
                         i += 1
                     else:
                         new_labelstring = concatenate_label(labelstring, appendixcounters[style])
                         lines[labelstringappendix_line] = re_LabelStringAppendix.sub(
-                                r'\1\2\3%s' % new_labelstring.replace("\\", "\\\\"),
+                                b'\\1\\2\\3%s' % new_labelstring.replace(b"\\", b"\\\\"),
                                 lines[labelstringappendix_line])
 
                 # Now we can safely add the LabelCounter line
-                lines.insert(labeltype_line + 1, "%sLabelCounter %s" % (space1, counter))
+                lines.insert(labeltype_line + 1, b"%sLabelCounter %s" % (space1, counter))
                 i += 1
 
             # Add the TocLevel setting for sectioning styles
-            if toclevel == "" and style in toclevels and maxcounter <= toclevels[style]:
-                lines.insert(i, '%s\tTocLevel %d' % (space1, toclevels[style]))
+            if toclevel == b"" and style in toclevels and maxcounter <= toclevels[style]:
+                lines.insert(i, b'%s\tTocLevel %d' % (space1, toclevels[style]))
                 i += 1
 
         i += 1
 
     if only_comment:
-        lines.insert(i, "Format 2")
+        lines.insert(i, b"Format 2")
     if usemodules:
         i = formatline + 1
         for mod in usemodules:
-            lines.insert(i, "UseModule " + mod)
+            lines.insert(i, b"UseModule " + mod)
             i += 1
 
     return format + 1
 
 
 def main(argv):
+    args = {"description": "Convert layout file <inputfile> to a newer format."}
+    parser = argparse.ArgumentParser(**args)
+
+    parser.add_argument("-t", "--to", type=int, dest="format", default= currentFormat,
+                        help=("destination layout format, default %i (latest)") % currentFormat)
+    parser.add_argument("input_file", nargs='?', type=cmd_arg, default=None,
+                        help="input file (default stdin)")
+    parser.add_argument("output_file", nargs='?', type=cmd_arg, default=None,
+                        help="output file (default stdout)")
+
+    options = parser.parse_args(argv[1:])
 
     # Open files
-    if len(argv) == 1:
+    if options.input_file:
+        source = open(options.input_file, 'rb')
+    elif PY2:
         source = sys.stdin
+    else:
+        source = sys.stdin.buffer
+
+    if options.output_file:
+        output = open(options.output_file, 'wb')
+    elif PY2:
         output = sys.stdout
-    elif len(argv) == 3:
-        source = open(argv[1], 'rb')
-        output = open(argv[2], 'wb')
     else:
-        error(usage(argv[0]))
+        output = sys.stdout.buffer
+
+    if options.format > currentFormat:
+        error("Format %i does not exist" % options.format)
 
     # Do the real work
     lines = read(source)
     format = 1
-    while (format < currentFormat):
-        format = convert(lines)
+    while format < options.format:
+        format = convert(lines, options.format)
     write(output, lines)
 
     # Close files
-    if len(argv) == 3:
+    if options.input_file:
         source.close()
+    if options.output_file:
         output.close()
 
     return 0