tex4ebook (9apr18)

git-svn-id: svn://tug.org/texlive/trunk@47414 c570f23f-e606-0410-a88d-b1316a301751

3 files changed, 103 insertions, 6 deletions

diff --git a/Master/texmf-dist/scripts/tex4ebook/exec_epub.lua b/Master/texmf-dist/scripts/tex4ebook/exec_epub.lua
index 1311516bfb6..d556c10ef55 100755
--- a/Master/texmf-dist/scripts/tex4ebook/exec_epub.lua
+++ b/Master/texmf-dist/scripts/tex4ebook/exec_epub.lua
@@ -119,7 +119,9 @@ local mimetypes = {
 	otf = "application/opentype",
 	ttf = "application/truetype",
 	woff = "application/font-woff",
-  js = "text/javascript"
+  js = "text/javascript",
+  mp3 = "audio/mpeg",
+  smil = "application/smil+xml"
 }
 
 function make_opf()
diff --git a/Master/texmf-dist/scripts/tex4ebook/exec_epub3.lua b/Master/texmf-dist/scripts/tex4ebook/exec_epub3.lua
index eb829284b59..56eff3f341c 100755
--- a/Master/texmf-dist/scripts/tex4ebook/exec_epub3.lua
+++ b/Master/texmf-dist/scripts/tex4ebook/exec_epub3.lua
@@ -1,5 +1,6 @@
 module(...,package.seeall)
 local eb = require("exec_epub")
+local dom = require("luaxml-domobject")
 
 local ext = "xhtml"
 local outputdir = nil
@@ -42,6 +43,72 @@ local function makeTOC(document)
   return template
 end
 
+local function add_media_overlays(content)
+  local add_meta = function(package, attributes, text)
+    local meta = package:create_element("meta",attributes)
+    local dur_el = meta:create_text_node(text)
+    meta:add_child_node(dur_el)
+    package:add_child_node(meta)
+  end
+  -- calculate total audio time
+  local calc_times = function(times)
+    local time = 0
+    for _, curr in ipairs(times) do
+      -- smil file contains timestamps in the H:M:S format, we need to parse it
+      local hours, minutes, seconds = curr:match("(%d+):(%d+):(%d+)")
+      time = time +  os.time({year=1970, day=1, month=1, hour=hours, min=minutes, sec=seconds})
+    end
+    return os.date("%H:%M:%S",time)
+  end
+  local opfdom = dom.parse(content)
+  local items = opfdom:query_selector("manifest item")
+  local ref = {}
+  local times = {}
+  local package = opfdom:query_selector("metadata")[1]
+  -- we must read all smil files and find references to html files
+  -- it is necessary to add media-overlay attribute to the referenced items
+  for _, item in ipairs(items) do
+    local href = item:get_attribute("href")
+    ref[href] = item
+    -- we must read audio length from the smil file and add it as a <meta> property
+    if href:match("smil$") then
+      local f = io.open(outputdir .. "/" .. href, "r")
+      if not f then break end
+      local smil = f:read("*all")
+      f:close()
+      local smildom = dom.parse(smil)
+      local audios = smildom:query_selector("audio")
+      local last = audios[#audios]
+      -- add audio duration to the metadata section
+      if last then
+        local duration = last:get_attribute("clipend")
+        if duration then
+          -- todo: calculate total audio length
+          table.insert(times, duration)
+          local audio_id = item:get_attribute("id")
+          add_meta(package, {property="media:duration", refines="#"..audio_id}, duration)
+        end
+      end
+
+      -- add the media-overlay attribute
+      local textref = smil:match('epub:textref="(.-)"')
+      local id = item:get_attribute("id")
+      local referenced = ref[textref]
+      if referenced then
+        referenced:set_attribute("media-overlay", id)
+      end
+    end
+  end
+  -- calculate length of all media overlay audio files
+  if #times > 0 then
+    local totaltime = calc_times(times)
+    add_meta(package,{property="media:duration"}, totaltime)
+  end
+  local serialized = opfdom:serialize()
+  return serialized
+end
+
+
 local function cleanOPF()
   -- in epub3, there must be table of contents
 	-- if there is no toc in the document, we must add generic one
@@ -72,6 +139,7 @@ local function cleanOPF()
     -- remove empty guide element
   end
   content = content:gsub("<guide>%s*</guide>","")
+  content = add_media_overlays(content)
   f = io.open(outputdir .. "/" ..opf,"w")
   f:write(content)
   f:close()
diff --git a/Master/texmf-dist/scripts/tex4ebook/tex4ebook b/Master/texmf-dist/scripts/tex4ebook/tex4ebook
index 5c9f65573f7..02906427453 100755
--- a/Master/texmf-dist/scripts/tex4ebook/tex4ebook
+++ b/Master/texmf-dist/scripts/tex4ebook/tex4ebook
@@ -7,6 +7,7 @@ require("lapp-mk4")
 -- require("ebookutils")
 local ebookutils = require "mkutils"
 local mkparams = require "mkparams"
+local mk_config = require "make4ht-config"
 
 -- Setting
 local latex_cmd="latex"
@@ -37,6 +38,7 @@ tex4ebook [switches] filename ["tex4ht.sty op." "tex4ht op." "t4ht op" "latex op
 -s,--shell-escape  Enable shell escape in htlatex run
 -t,--tidy Run html tidy on html output. May result in wrong spacing!
 -v,--version  Display version number
+-x,--xetex Use xelatex for document compilation
 <filename> (string) Input file name
 ]]
 
@@ -52,12 +54,14 @@ else
 end
 
 if args.version then
-  print "tex4ebook v0.1e"
+  print "tex4ebook v0.2"
   return 
 end
 
 if args.lua then
   latex_cmd="dvilualatex"
+elseif args.xetex then
+  latex_cmd="xelatex --no-pdf"
 end
 
 
@@ -125,12 +129,17 @@ local latex_par = latex_par + args[5]
 args.filename=input_file
 local params = mkparams.process_args(args)
 
+
+local output_format = params.output_format --args.format
+-- use epub as default output_format
+output_format = output_format or "epub"
+local extensions = ebookutils.load_extensions(params.extensions, output_format)
 -- but also support tex4ebook!s own parameters
 local oldparams = {
   -- htlatex=latex_cmd
   -- ,input=input 
   -- ,tex_file = tex_file
-  format=args.format
+  format= output_format
   -- ,latex_par=latex_par
   -- ,tex4ht_sty_par=tex4ht_sty_par
   -- ,tex4ht_par=tex4ht_par
@@ -152,14 +161,28 @@ end
 params.tex4ht_sty_par=params.tex4ht_sty_par .. ",charset=utf-8,"..args.format
 params.tex4ht_par= " -cmozhtf -utf8" .. params.tex4ht_par
 
-if output_formats[args.format] then
-  executor=require("exec_"..args.format)
+
+if output_formats[output_format] then
+  executor=require("exec_"..output_format)
   params=executor.prepare(params)
+  if #extensions > 0 then
+    params = ebookutils.extensions_prepare_parameters(extensions,params)
+  end
 else
-  print("Unknown output format: "..args.format)
+  print("Unknown output format: "..output_format)
   return
 end
 
+-- find tex4ebook configuration file
+local configname = "tex4ebook"
+local conffile = mk_config.find_config(configname) or mk_config.find_xdg_config(configname)
+if conffile then
+  print("Using configuration file: " .. conffile)
+  ebookutils.load_config(params, conffile)
+else
+  print "No conffile"
+end
+
 local build_file = input.. ".mk4"
 
 if args["build-file"] and args["build-file"] ~= "nil"  then 
@@ -171,6 +194,10 @@ local config_file = ebookutils.load_config(params, build_file)
 params["config_file"] = config_file
 --config_file.Make:run()
 print("${htlatex} ${input} \"${tex4ht_sty_par}\" \"${tex4ht_par}\" \"${t4ht_par}\" \"${latex_par}\"" % params)
+if #extensions > 0 then
+  config_file.Make = ebookutils.extensions_modify_build(extensions, config_file.Make)
+end
+
 executor.run(input,params)
 executor.writeContainer()
 executor.clean()