From 4a89446914186ed3aa80539b0726483770f0a49d Mon Sep 17 00:00:00 2001
From: Michael Shavit <shavitmichael@gmail.com>
Date: Sun, 27 Oct 2019 19:41:34 -0400
Subject: [PATCH] Enable Synthetic Spreads for the Kobo Forma.

Rotating the device into landscape mode will cause it to display two
pages side by side. This is particularly useful for input comics whose
spreads are already split into two files.

See https://github.com/kobolabs/epub-spec#synthetic-spreads for
additional information on synthetic spreads.

(Tiny drive-by: Add Kobo format to list of profiles for which the AUTO
format is EPUB)
---
 kindlecomicconverter/comic2ebook.py | 57 ++++++++++++++++++++++++-----
 1 file changed, 48 insertions(+), 9 deletions(-)

diff --git a/kindlecomicconverter/comic2ebook.py b/kindlecomicconverter/comic2ebook.py
index 9cdeee7..d33a68f 100755
--- a/kindlecomicconverter/comic2ebook.py
+++ b/kindlecomicconverter/comic2ebook.py
@@ -302,6 +302,11 @@ def buildOPF(dstdir, title, filelist, cover=None):
         else:
             f.writelines(["<meta name=\"orientation-lock\" content=\"portrait\"/>\n",
                           "<meta name=\"region-mag\" content=\"true\"/>\n"])
+    elif options.supportSyntheticSpread:
+        f.writelines([
+            "<meta property=\"rendition:spread\">landscape</meta>\n",
+            "<meta property=\"rendition:layout\">pre-paginated</meta>\n"
+        ])
     else:
         f.writelines(["<meta property=\"rendition:orientation\">portrait</meta>\n",
                       "<meta property=\"rendition:spread\">portrait</meta>\n",
@@ -334,38 +339,64 @@ def buildOPF(dstdir, title, filelist, cover=None):
         f.write("<item id=\"img_" + str(uniqueid) + "\" href=\"" + folder + "/" + path[1] + "\" media-type=\"" +
                 mt + "\"/>\n")
     f.write("<item id=\"css\" href=\"Text/style.css\" media-type=\"text/css\"/>\n")
+
+
+    def pageSpreadProperty(pageside):
+        if options.iskindle:
+            return "linear=\"yes\" properties=\"page-spread-%s\"" % pageside
+        elif options.isKobo:
+            return "properties=\"rendition:page-spread-%s\"" % pageside
+        else:
+            return ""
+
     if options.righttoleft:
         f.write("</manifest>\n<spine page-progression-direction=\"rtl\" toc=\"ncx\">\n")
         pageside = "right"
     else:
         f.write("</manifest>\n<spine page-progression-direction=\"ltr\" toc=\"ncx\">\n")
         pageside = "left"
-    if options.iskindle:
+    if options.iskindle or options.supportSyntheticSpread:
         for entry in reflist:
             if options.righttoleft:
                 if entry.endswith("-b"):
-                    f.write("<itemref idref=\"page_" + entry + "\" linear=\"yes\" properties=\"page-spread-right\"/>\n")
+                    f.write(
+                        "<itemref idref=\"page_%s\" %s/>\n" % (entry,
+                                                               pageSpreadProperty("right"))
+                    )
                     pageside = "right"
                 elif entry.endswith("-c"):
-                    f.write("<itemref idref=\"page_" + entry + "\" linear=\"yes\" properties=\"page-spread-left\"/>\n")
+                    f.write(
+                        "<itemref idref=\"page_%s\" %s/>\n" % (entry,
+                                                               pageSpreadProperty("left"))
+                    )
                     pageside = "right"
                 else:
-                    f.write("<itemref idref=\"page_" + entry + "\" linear=\"yes\" properties=\"page-spread-" +
-                            pageside + "\"/>\n")
+                    f.write(
+                        "<itemref idref=\"page_%s\" %s/>\n" % (entry,
+                                                               pageSpreadProperty(pageside))
+                    )
                     if pageside == "right":
                         pageside = "left"
                     else:
                         pageside = "right"
             else:
                 if entry.endswith("-b"):
-                    f.write("<itemref idref=\"page_" + entry + "\" linear=\"yes\" properties=\"page-spread-left\"/>\n")
+                    f.write(
+                        "<itemref idref=\"page_%s\" %s/>\n" % (entry,
+                                                               pageSpreadProperty("left"))
+                    )
                     pageside = "left"
                 elif entry.endswith("-c"):
-                    f.write("<itemref idref=\"page_" + entry + "\" linear=\"yes\" properties=\"page-spread-right\"/>\n")
+                    f.write(
+                        "<itemref idref=\"page_%s\" %s/>\n" % (entry,
+                                                               pageSpreadProperty("right"))
+                    )
                     pageside = "left"
                 else:
-                    f.write("<itemref idref=\"page_" + entry + "\" linear=\"yes\" properties=\"page-spread-" +
-                            pageside + "\"/>\n")
+                    f.write(
+                        "<itemref idref=\"page_%s\" %s/>\n" % (entry,
+                                                               pageSpreadProperty(pageside))
+                    )
                 if pageside == "right":
                     pageside = "left"
                 else:
@@ -982,6 +1013,7 @@ def makeParser():
 def checkOptions(options):
     options.panelview = True
     options.iskindle = False
+    options.isKobo = False
     options.bordersColor = None
     options.keep_epub = False
     if options.format == 'EPUB-200MB':
@@ -993,6 +1025,7 @@ def checkOptions(options):
         options.keep_epub = True
         options.format = 'MOBI'
     options.kfx = False
+    options.supportSyntheticSpread = False
     if options.format == 'Auto':
         if options.profile in ['K1', 'K2', 'K34', 'K578', 'KPW', 'KPW5', 'KV', 'KO', 'K11', 'KS']:
             options.format = 'MOBI'
@@ -1003,6 +1036,12 @@ def checkOptions(options):
             options.format = 'CBZ'
     if options.profile in ['K1', 'K2', 'K34', 'K578', 'KPW', 'KPW5', 'KV', 'KO', 'K11', 'KS']:
         options.iskindle = True
+    elif options.profile in ['OTHER', 'KoMT', 'KoG', 'KoGHD', 'KoA', 'KoAHD', 'KoAH2O', 'KoAO', 'KoF']:
+        options.isKobo = True
+    # Other Kobo devices probably support synthetic spreads as well, but
+    # they haven't been tested.
+    if options.profile in ['KoF']:
+        options.supportSyntheticSpread = True
     if options.white_borders:
         options.bordersColor = 'white'
     if options.black_borders: