Include all [scr]article styles in beamer article layouts.

File format change. On format reversion, we need to put some extra code
in the local layout that emulates the 2.3 behavior.
Simply Input'ing the respective layouts is unfortunately not enough,
due to the insertion order.

See #9977

lib/layouts/article-beamer.layout

@@ -6,6 +6,7 @@
 Format 60
 
 # Includes
+Input article.layout
 Input beamer.layout
 
 # override settings inherited from beamer.layout (Paul Rubin <rubin@msu.edu>)

lib/layouts/scrarticle-beamer.layout

@@ -6,6 +6,7 @@
 Format 60
 
 # Includes
+Input scrartcl.layout
 Input beamer.layout
 
 # override settings inherited from beamer.layout

lib/lyx2lyx/lyx_2_3.py

@@ -25,7 +25,7 @@ import sys, os
 
 # Uncomment only what you need to import, please.
 
-#from parser_tools import find_token, find_end_of, find_tokens, \
+from parser_tools import find_end_of#, find_token, find_tokens, \
 #  find_token_exact, find_end_of_inset, find_end_of_layout, \
 #  find_token_backwards, is_in_inset, get_value, get_quoted_value, \
 #  del_token, check_token, get_option_value, get_bool_value
@@ -178,6 +178,89 @@ def revert_ibranches(document):
         document.header[i:i] = lines
 
 
+def revert_beamer_article_styles(document):
+    " Include (scr)article styles in beamer article "
+
+    beamer_articles = ["article-beamer", "scrarticle-beamer"]
+    if document.textclass not in beamer_articles:
+        return
+
+    inclusion = "article.layout"
+    if document.textclass == "scrarticle-beamer":
+        inclusion = "scrartcl.layout"
+
+    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
+
+
+def convert_beamer_article_styles(document):
+    " Remove included (scr)article styles in beamer article "
+
+    beamer_articles = ["article-beamer", "scrarticle-beamer"]
+    if document.textclass not in beamer_articles:
+        return
+
+    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
+
+
 ##
 # Conversion hub
 #
@@ -186,10 +269,12 @@ supported_versions = ["2.3.0", "2.3"]
 convert = [
            [509, [convert_microtype]],
            [510, [convert_dateinset]],
-           [511, [convert_ibranches]]
+           [511, [convert_ibranches]],
+           [512, [convert_beamer_article_styles]]
           ]
 
 revert =  [
+           [511, [revert_beamer_article_styles]],
            [510, [revert_ibranches]],
            [509, []],
            [508, [revert_microtype]]

src/version.h

@@ -32,8 +32,8 @@ extern char const * const lyx_version_info;
 
 // Do not remove the comment below, so we get merge conflict in
 // independent branches. Instead add your own.
-#define LYX_FORMAT_LYX 511 // rgh: inverted branches
-#define LYX_FORMAT_TEX2LYX 511
+#define LYX_FORMAT_LYX 512 // spitz: beamer article extension
+#define LYX_FORMAT_TEX2LYX 512
 
 #if LYX_FORMAT_TEX2LYX != LYX_FORMAT_LYX
 #ifndef _MSC_VER