valid toc.ncx

Makefile

@@ -5,7 +5,9 @@ example-gpub:
 	cd example-gpub; zip -r ../example-book.gpub *; cd -
 
 epub:
-	cd out; zip -r ../out.epub *; cd -
+	find . -name "out.epub" -exec rm {} \;
+	cd out; zip -X ../out.epub mimetype
+	cd out; zip -rg ../out.epub META-INF content.opf style.css  toc.ncx book
 
 example:
 	awk -f g2e.awk example-gpub/

README.md

@@ -39,6 +39,7 @@ example-gpub/
   metadata.txt
   book/
     index.gmi
+    toc.gmi
     cover.gmi
     chapter1.gmi
     chapter2.gmi
@@ -52,6 +53,10 @@ example-gpub/
 
 note that only `.gmi`, `.png`, `.jpg` and `.gif` files are handled.
 
+## table of contents
+
+there has to be a `toc.gmi` file that will be used as the `nav` element. this file has to have a single set of links pointed to internal `.gmi` files, not images.
+
 ## raw html
 
 you can insert raw html using the corresponding `.gmo` syntax: the contents of a line that starts with `+` will be inserted as is.

g2e.awk

@@ -11,6 +11,8 @@ BEGIN{
 	epubodir = "out/"
 	metadatafile = gpubdir "metadata.txt"
 
+	"date -u +%FT%TZ" | getline meta["date"]
+
 	# read metadata file fields
 	while( getline < metadatafile ){
 		key = $1; sub(":","",key)
@@ -90,7 +92,9 @@ ARGIND==1 && /^=>/{
 	ch["name"] = name
 	ch["num"]++
 	ch["dir"] = indexdirname
-	content = content "    <item id=\"" id "\" href=\"" indexdirname id ".xhtml\" media-type=\"application/xhtml+xml\"/>\n"
+	properties = ""
+	if( id~/^toc/ ) properties = "properties=\"nav\""
+	content = content "    <item id=\"" id "\" href=\"" indexdirname id ".xhtml\" media-type=\"application/xhtml+xml\" " properties "/>\n"
 	spinetoc = spinetoc "    <itemref idref=\"" id "\" />\n"
 	toc = toc write_template( "toc-navpoint.ncx", ch )
 	next
@@ -116,7 +120,7 @@ ARGIND==2 && FNR==1{
 		if(id~meta["cover"]){
 			properties = "properties=\"cover-image\""
 		}
-		content = content "    <item id=\"" id "\" href=\"" dest "\" media-type=\"" mediatype "\" " properties "/>\n"
+		content = content "    <item id=\"" id "\" href=\"" dest "\" " properties " media-type=\"" mediatype "\"/>\n"
 	}
 	$0 = line
 
@@ -135,7 +139,10 @@ ARGIND==2 && FNR==1{
 
 function finishfile(){
 	# finish writing the previous content file
-	out = out "\t</main>\n  </body>\n</html>"
+	if(name~/^toc$/){ append("</ol></nav>"); is_list = 0 }
+	if(is_list){ append("</ul>"); is_list = 0 }
+	if(is_pre){ append("</pre>"); is_pre = 0 }
+	out = out "    </main>\n  </body>\n</html>"
 	print out > nameout
 }
 function append(line){
@@ -216,6 +223,19 @@ sub(/^>[[:space:]]*/,""){
 	next
 }
 
+
+# toc links
+
+name~/^toc$/ && sub(/^=>[[:space:]]*/,""){
+	link = $1
+	text = $2
+	for(i=3;i<=NF;i++) text = text " " $i
+	if(!is_list){ append("<nav epub:type=\"toc\"><ol>"); is_list = 1 }
+	sub(/gmi$/,"xhtml",link)
+	append("<li><a href=\"" link "\">" text "</a></li>")
+	next
+}
+
 # links?
 sub(/^=>[[:space:]]*/,""){
 	link = $1
@@ -226,7 +246,7 @@ sub(/^=>[[:space:]]*/,""){
 		append("<p><a href=\"" link "\">" text "</a></p>")
 	}
 	else if(link~/(gif|jpg|png)$/){
-		append("<img src=\"" link "\" alt=\"" text "\" />")
+		append("<picture><img src=\"" link "\" alt=\"" text "\" /></picture>")
 	}
 	else{
 		append("<p><a href=\"" link "\">" text "</a></p>")

templates/content-header.opf

@@ -1,13 +1,14 @@
 <?xml version="1.0"?>
-<package version="2.0" xmlns="http://www.idpf.org/2007/opf" unique-identifier="BookId">
+<package version="3.0" xmlns="http://www.idpf.org/2007/opf" unique-identifier="BookId">
 
   <metadata xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:opf="http://www.idpf.org/2007/opf">
     <dc:title>{title}</dc:title>
     <dc:language>{language}</dc:language>
-    <dc:identifier id="BookId" opf:scheme="ISBN">{id}</dc:identifier>
-    <dc:creator opf:role="aut">{author}</dc:creator>
+    <dc:identifier id="BookId">{id}</dc:identifier>
+    <dc:creator id="creator">{author}</dc:creator>
     <dc:description>{description}</dc:description>
     <dc:date>{publishDate}</dc:date>
+    <meta property="dcterms:modified">{date}</meta>
     <meta content="{cover}" name="cover"/>
   </metadata>
 

templates/header.xhtml

@@ -1,13 +1,12 @@
-<?xml version="1.0" encoding="UTF-8" ?>
-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
-<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
+<?xml version="1.0" encoding="utf-8"?>
+<html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops" lang="en-US" xml:lang="en-US">
   <head>
-    <meta http-equiv="Content-Type" content="application/xhtml+xml; charset=utf-8" />
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
     <title>{title}</title>
     <link rel="stylesheet" href="../style.css" type="text/css" />
   </head>
   <body>
     <header>
-	<h1>{title}</h1>
+	<h1 class="header">{title}</h1>
     </header>
     <main>

templates/toc-header.ncx

@@ -1,7 +1,4 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE ncx PUBLIC "-//NISO//DTD ncx 2005-1//EN"
-"http://www.daisy.org/z3986/2005/ncx-2005-1.dtd">
-
 <ncx version="2005-1" xml:lang="en" xmlns="http://www.daisy.org/z3986/2005/ncx/">
 
   <head>