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Add swappable CSS for HTML previews.
[librarian.git] / librarian / epub.py
diff --git a/librarian/epub.py b/librarian/epub.py
index dae841c..be9488a 100644 (file)
--- a/librarian/epub.py
+++ b/librarian/epub.py
@@ -3,21 +3,23 @@
 # This file is part of Librarian, licensed under GNU Affero GPLv3 or later.
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #
 # This file is part of Librarian, licensed under GNU Affero GPLv3 or later.
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #
-from __future__ import with_statement
+from __future__ import print_function, unicode_literals
 
 import os
 import os.path
 import re
 import subprocess
 
 import os
 import os.path
 import re
 import subprocess
-from StringIO import StringIO
+from six import BytesIO
 from copy import deepcopy
 from copy import deepcopy
+from mimetypes import guess_type
+
 from lxml import etree
 import zipfile
 from tempfile import mkdtemp, NamedTemporaryFile
 from shutil import rmtree
 
 from librarian import RDFNS, WLNS, NCXNS, OPFNS, XHTMLNS, DCNS, OutputFile
 from lxml import etree
 import zipfile
 from tempfile import mkdtemp, NamedTemporaryFile
 from shutil import rmtree
 
 from librarian import RDFNS, WLNS, NCXNS, OPFNS, XHTMLNS, DCNS, OutputFile
-from librarian.cover import DefaultEbookCover
+from librarian.cover import make_cover
 
 from librarian import functions, get_resource
 
 
 from librarian import functions, get_resource
 
@@ -26,57 +28,69 @@ from librarian.hyphenator import Hyphenator
 functions.reg_person_name()
 functions.reg_lang_code_3to2()
 
 functions.reg_person_name()
 functions.reg_lang_code_3to2()
 
+
+def squeeze_whitespace(s):
+    return re.sub(b'\\s+', b' ', s)
+
+
 def set_hyph_language(source_tree):
     def get_short_lng_code(text):
         result = ''
         text = ''.join(text)
         with open(get_resource('res/ISO-639-2_8859-1.txt'), 'rb') as f:
 def set_hyph_language(source_tree):
     def get_short_lng_code(text):
         result = ''
         text = ''.join(text)
         with open(get_resource('res/ISO-639-2_8859-1.txt'), 'rb') as f:
-            for line in f:
+            for line in f.read().decode('latin1').split('\n'):
                 list = line.strip().split('|')
                 if list[0] == text:
                 list = line.strip().split('|')
                 if list[0] == text:
-                    result=list[2]
+                    result = list[2]
         if result == '':
             return text
         else:
             return result
         if result == '':
             return text
         else:
             return result
-    bibl_lng = etree.XPath('//dc:language//text()', namespaces = {'dc':str(DCNS)})(source_tree)
-    short_lng = get_short_lng_code(bibl_lng[0])   
+    bibl_lng = etree.XPath('//dc:language//text()',
+                           namespaces={'dc': str(DCNS)})(source_tree)
+    short_lng = get_short_lng_code(bibl_lng[0])
     try:
     try:
-        return Hyphenator(get_resource('res/hyph-dictionaries/hyph_' + short_lng + '.dic'))
+        return Hyphenator(get_resource('res/hyph-dictionaries/hyph_' +
+                                       short_lng + '.dic'))
     except:
         pass
     except:
         pass
-    
+
+
 def hyphenate_and_fix_conjunctions(source_tree, hyph):
 def hyphenate_and_fix_conjunctions(source_tree, hyph):
-    if hyph is not None:
-        texts = etree.XPath('/utwor/*[2]//text()')(source_tree)
-        for t in texts:
-            parent = t.getparent()
+    texts = etree.XPath('/utwor/*[2]//text()')(source_tree)
+    for t in texts:
+        parent = t.getparent()
+        if hyph is not None:
             newt = ''
             wlist = re.compile(r'\w+|[^\w]', re.UNICODE).findall(t)
             for w in wlist:
             newt = ''
             wlist = re.compile(r'\w+|[^\w]', re.UNICODE).findall(t)
             for w in wlist:
-                newt += hyph.inserted(w, u'\u00AD')       
-            newt = re.sub(r'(?<=\s\w)\s+', u'\u00A0', newt)
-            if t.is_text:
-                parent.text = newt
-            elif t.is_tail:
-                parent.tail = newt
-        
+                newt += hyph.inserted(w, u'\u00AD')
+        else:
+            newt = t
+        newt = re.sub(r'(?<=\s\w)\s+', u'\u00A0', newt)
+        if t.is_text:
+            parent.text = newt
+        elif t.is_tail:
+            parent.tail = newt
+
+
 def inner_xml(node):
     """ returns node's text and children as a string
 
 def inner_xml(node):
     """ returns node's text and children as a string
 
-    >>> print inner_xml(etree.fromstring('<a>x<b>y</b>z</a>'))
+    >>> print(inner_xml(etree.fromstring('<a>x<b>y</b>z</a>')))
     x<b>y</b>z
     """
 
     nt = node.text if node.text is not None else ''
     x<b>y</b>z
     """
 
     nt = node.text if node.text is not None else ''
-    return ''.join([nt] + [etree.tostring(child) for child in node])
+    return ''.join([nt] + [etree.tostring(child, encoding='unicode') for child in node])
+
 
 def set_inner_xml(node, text):
     """ sets node's text and children from a string
 
     >>> e = etree.fromstring('<a>b<b>x</b>x</a>')
     >>> set_inner_xml(e, 'x<b>y</b>z')
 
 def set_inner_xml(node, text):
     """ sets node's text and children from a string
 
     >>> e = etree.fromstring('<a>b<b>x</b>x</a>')
     >>> set_inner_xml(e, 'x<b>y</b>z')
-    >>> print etree.tostring(e)
+    >>> print(etree.tostring(e, encoding='unicode'))
     <a>x<b>y</b>z</a>
     """
 
     <a>x<b>y</b>z</a>
     """
 
@@ -88,7 +102,7 @@ def set_inner_xml(node, text):
 def node_name(node):
     """ Find out a node's name
 
 def node_name(node):
     """ Find out a node's name
 
-    >>> print node_name(etree.fromstring('<a>X<b>Y</b>Z</a>'))
+    >>> print(node_name(etree.fromstring('<a>X<b>Y</b>Z</a>')))
     XYZ
     """
 
     XYZ
     """
 
@@ -103,11 +117,13 @@ def node_name(node):
     return tempnode.text
 
 
     return tempnode.text
 
 
-def xslt(xml, sheet):
+def xslt(xml, sheet, **kwargs):
     if isinstance(xml, etree._Element):
         xml = etree.ElementTree(xml)
     with open(sheet) as xsltf:
     if isinstance(xml, etree._Element):
         xml = etree.ElementTree(xml)
     with open(sheet) as xsltf:
-        return xml.xslt(etree.parse(xsltf))
+        transform = etree.XSLT(etree.parse(xsltf))
+        params = dict((key, transform.strparam(value)) for key, value in kwargs.items())
+        return transform(xml, **params)
 
 
 def replace_characters(node):
 
 
 def replace_characters(node):
@@ -134,7 +150,7 @@ def find_annotations(annotations, source, part_no):
     for child in source:
         if child.tag in ('pe', 'pa', 'pt', 'pr'):
             annotation = deepcopy(child)
     for child in source:
         if child.tag in ('pe', 'pa', 'pt', 'pr'):
             annotation = deepcopy(child)
-            number = str(len(annotations)+1)
+            number = str(len(annotations) + 1)
             annotation.set('number', number)
             annotation.set('part', str(part_no))
             annotation.tail = ''
             annotation.set('number', number)
             annotation.set('part', str(part_no))
             annotation.tail = ''
@@ -156,10 +172,10 @@ class Stanza(object):
 
     >>> s = etree.fromstring("<strofa>a <b>c</b> <b>c</b>/\\nb<x>x/\\ny</x>c/ \\nd</strofa>")
     >>> Stanza(s).versify()
 
     >>> s = etree.fromstring("<strofa>a <b>c</b> <b>c</b>/\\nb<x>x/\\ny</x>c/ \\nd</strofa>")
     >>> Stanza(s).versify()
-    >>> print etree.tostring(s)
-    <strofa><wers_normalny>a <b>c</b> <b>c</b></wers_normalny><wers_normalny>b<x>x/
+    >>> print(etree.tostring(s, encoding='unicode'))
+    <strofa><wers_normalny>a <b>c</b><b>c</b></wers_normalny><wers_normalny>b<x>x/
     y</x>c</wers_normalny><wers_normalny>d</wers_normalny></strofa>
     y</x>c</wers_normalny><wers_normalny>d</wers_normalny></strofa>
-    
+
     """
     def __init__(self, stanza_elem):
         self.stanza = stanza_elem
     """
     def __init__(self, stanza_elem):
         self.stanza = stanza_elem
@@ -174,7 +190,7 @@ class Stanza(object):
         tail = self.stanza.tail
         self.stanza.clear()
         self.stanza.tail = tail
         tail = self.stanza.tail
         self.stanza.clear()
         self.stanza.tail = tail
-        self.stanza.extend(self.verses)
+        self.stanza.extend(verse for verse in self.verses if verse.text or len(verse) > 0)
 
     def open_normal_verse(self):
         self.open_verse = self.stanza.makeelement("wers_normalny")
 
     def open_normal_verse(self):
         self.open_verse = self.stanza.makeelement("wers_normalny")
@@ -191,6 +207,8 @@ class Stanza(object):
         for i, verse_text in enumerate(re.split(r"/\s*\n", text)):
             if i:
                 self.open_normal_verse()
         for i, verse_text in enumerate(re.split(r"/\s*\n", text)):
             if i:
                 self.open_normal_verse()
+            if not verse_text.strip():
+                continue
             verse = self.get_open_verse()
             if len(verse):
                 verse[-1].tail = (verse[-1].tail or "") + verse_text
             verse = self.get_open_verse()
             if len(verse):
                 verse[-1].tail = (verse[-1].tail or "") + verse_text
@@ -221,18 +239,17 @@ def add_to_manifest(manifest, partno):
     """ Adds a node to the manifest section in content.opf file """
 
     partstr = 'part%d' % partno
     """ Adds a node to the manifest section in content.opf file """
 
     partstr = 'part%d' % partno
-    e = manifest.makeelement(OPFNS('item'), attrib={
-                                 'id': partstr,
-                                 'href': partstr + '.html',
-                                 'media-type': 'application/xhtml+xml',
-                             })
+    e = manifest.makeelement(
+        OPFNS('item'), attrib={'id': partstr, 'href': partstr + '.html',
+                               'media-type': 'application/xhtml+xml'}
+    )
     manifest.append(e)
 
 
 def add_to_spine(spine, partno):
     """ Adds a node to the spine section in content.opf file """
 
     manifest.append(e)
 
 
 def add_to_spine(spine, partno):
     """ Adds a node to the spine section in content.opf file """
 
-    e = spine.makeelement(OPFNS('itemref'), attrib={'idref': 'part%d' % partno});
+    e = spine.makeelement(OPFNS('itemref'), attrib={'idref': 'part%d' % partno})
     spine.append(e)
 
 
     spine.append(e)
 
 
@@ -246,7 +263,7 @@ class TOC(object):
     def add(self, name, part_href, level=0, is_part=True, index=None):
         assert level == 0 or index is None
         if level > 0 and self.children:
     def add(self, name, part_href, level=0, is_part=True, index=None):
         assert level == 0 or index is None
         if level > 0 and self.children:
-            return self.children[-1].add(name, part_href, level-1, is_part)
+            return self.children[-1].add(name, part_href, level - 1, is_part)
         else:
             t = TOC(name)
             t.part_href = part_href
         else:
             t = TOC(name)
             t.part_href = part_href
@@ -304,12 +321,12 @@ class TOC(object):
             texts.append(
                 "<div style='margin-left:%dem;'><a href='%s'>%s</a></div>" %
                 (depth, child.href(), child.name))
             texts.append(
                 "<div style='margin-left:%dem;'><a href='%s'>%s</a></div>" %
                 (depth, child.href(), child.name))
-            texts.append(child.html_part(depth+1))
+            texts.append(child.html_part(depth + 1))
         return "\n".join(texts)
 
     def html(self):
         return "\n".join(texts)
 
     def html(self):
-        with open(get_resource('epub/toc.html')) as f:
-            t = unicode(f.read(), 'utf-8')
+        with open(get_resource('epub/toc.html'), 'rb') as f:
+            t = f.read().decode('utf-8')
         return t % self.html_part()
 
 
         return t % self.html_part()
 
 
@@ -327,10 +344,10 @@ def chop(main_text):
     # prepare a container for each chunk
     part_xml = etree.Element('utwor')
     etree.SubElement(part_xml, 'master')
     # prepare a container for each chunk
     part_xml = etree.Element('utwor')
     etree.SubElement(part_xml, 'master')
-    main_xml_part = part_xml[0] # master
+    main_xml_part = part_xml[0]  # master
 
     last_node_part = False
 
     last_node_part = False
-    
+
     # the below loop are workaround for a problem with epubs in drama ebooks without acts
     is_scene = False
     is_act = False
     # the below loop are workaround for a problem with epubs in drama ebooks without acts
     is_scene = False
     is_act = False
@@ -340,7 +357,7 @@ def chop(main_text):
             is_scene = True
         elif name == 'naglowek_akt':
             is_act = True
             is_scene = True
         elif name == 'naglowek_akt':
             is_act = True
-    
+
     for one_part in main_text:
         name = one_part.tag
         if is_act is False and is_scene is True:
     for one_part in main_text:
         name = one_part.tag
         if is_act is False and is_scene is True:
@@ -364,7 +381,7 @@ def chop(main_text):
                 main_xml_part[:] = [deepcopy(one_part)]
             else:
                 main_xml_part.append(deepcopy(one_part))
                 main_xml_part[:] = [deepcopy(one_part)]
             else:
                 main_xml_part.append(deepcopy(one_part))
-                last_node_part = False            
+                last_node_part = False
     yield part_xml
 
 
     yield part_xml
 
 
@@ -390,47 +407,47 @@ def transform_chunk(chunk_xml, chunk_no, annotations, empty=False, _empty_html_s
         replace_by_verse(chunk_xml)
         html_tree = xslt(chunk_xml, get_resource('epub/xsltScheme.xsl'))
         chars = used_chars(html_tree.getroot())
         replace_by_verse(chunk_xml)
         html_tree = xslt(chunk_xml, get_resource('epub/xsltScheme.xsl'))
         chars = used_chars(html_tree.getroot())
-        output_html = etree.tostring(html_tree, pretty_print = True,
-                    xml_declaration = True,
-                    encoding = "utf-8",
-                    doctype='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" ' +
-                            '"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">')
+        output_html = etree.tostring(
+            html_tree, pretty_print=True, xml_declaration=True,
+            encoding="utf-8",
+            doctype='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" ' +
+                    '"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">'
+        )
     return output_html, toc, chars
 
 
     return output_html, toc, chars
 
 
-def transform(wldoc, verbose=False,
-              style=None, html_toc=False,
-              sample=None, cover=None, flags=None):
+def transform(wldoc, verbose=False, style=None, html_toc=False,
+              sample=None, cover=None, flags=None, hyphenate=False, ilustr_path='', output_type='epub'):
     """ produces a EPUB file
 
     sample=n: generate sample e-book (with at least n paragraphs)
     cover: a cover.Cover factory or True for default
     """ produces a EPUB file
 
     sample=n: generate sample e-book (with at least n paragraphs)
     cover: a cover.Cover factory or True for default
-    flags: less-advertising, without-fonts, working-copy, with-full-fonts
+    flags: less-advertising, without-fonts, working-copy
     """
 
     def transform_file(wldoc, chunk_counter=1, first=True, sample=None):
         """ processes one input file and proceeds to its children """
 
         replace_characters(wldoc.edoc.getroot())
     """
 
     def transform_file(wldoc, chunk_counter=1, first=True, sample=None):
         """ processes one input file and proceeds to its children """
 
         replace_characters(wldoc.edoc.getroot())
-        
-        hyphenator = set_hyph_language(wldoc.edoc.getroot())
+
+        hyphenator = set_hyph_language(wldoc.edoc.getroot()) if hyphenate else None
         hyphenate_and_fix_conjunctions(wldoc.edoc.getroot(), hyphenator)
         hyphenate_and_fix_conjunctions(wldoc.edoc.getroot(), hyphenator)
-        
-        
+
         # every input file will have a TOC entry,
         # pointing to starting chunk
         toc = TOC(wldoc.book_info.title, "part%d.html" % chunk_counter)
         chars = set()
         if first:
             # write book title page
         # every input file will have a TOC entry,
         # pointing to starting chunk
         toc = TOC(wldoc.book_info.title, "part%d.html" % chunk_counter)
         chars = set()
         if first:
             # write book title page
-            html_tree = xslt(wldoc.edoc, get_resource('epub/xsltTitle.xsl'))
+            html_tree = xslt(wldoc.edoc, get_resource('epub/xsltTitle.xsl'), outputtype=output_type)
             chars = used_chars(html_tree.getroot())
             chars = used_chars(html_tree.getroot())
-            zip.writestr('OPS/title.html',
-                 etree.tostring(html_tree, pretty_print = True,
-                       xml_declaration = True,
-                    encoding = "utf-8",
-                    doctype='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" ' +
-                            '"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">'))
+            html_string = etree.tostring(
+                html_tree, pretty_print=True, xml_declaration=True,
+                encoding="utf-8",
+                doctype='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"' +
+                        ' "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">'
+            )
+            zip.writestr('OPS/title.html', squeeze_whitespace(html_string))
             # add a title page TOC entry
             toc.add(u"Strona tytułowa", "title.html")
         elif wldoc.book_info.parts:
             # add a title page TOC entry
             toc.add(u"Strona tytułowa", "title.html")
         elif wldoc.book_info.parts:
@@ -441,13 +458,13 @@ def transform(wldoc, verbose=False,
             else:
                 html_tree = xslt(wldoc.edoc, get_resource('epub/xsltChunkTitle.xsl'))
                 chars = used_chars(html_tree.getroot())
             else:
                 html_tree = xslt(wldoc.edoc, get_resource('epub/xsltChunkTitle.xsl'))
                 chars = used_chars(html_tree.getroot())
-                html_string = etree.tostring(html_tree, 
-                       pretty_print = True,
-                    xml_declaration = True,
-                    encoding = "utf-8",
-                    doctype='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" ' +
-                            '"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">')
-            zip.writestr('OPS/part%d.html' % chunk_counter, html_string)
+                html_string = etree.tostring(
+                    html_tree, pretty_print=True, xml_declaration=True,
+                    encoding="utf-8",
+                    doctype='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"' +
+                            ' "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">'
+                )
+            zip.writestr('OPS/part%d.html' % chunk_counter, squeeze_whitespace(html_string))
             add_to_manifest(manifest, chunk_counter)
             add_to_spine(spine, chunk_counter)
             chunk_counter += 1
             add_to_manifest(manifest, chunk_counter)
             add_to_spine(spine, chunk_counter)
             chunk_counter += 1
@@ -473,7 +490,7 @@ def transform(wldoc, verbose=False,
 
                 toc.extend(chunk_toc)
                 chars = chars.union(chunk_chars)
 
                 toc.extend(chunk_toc)
                 chars = chars.union(chunk_chars)
-                zip.writestr('OPS/part%d.html' % chunk_counter, chunk_html)
+                zip.writestr('OPS/part%d.html' % chunk_counter, squeeze_whitespace(chunk_html))
                 add_to_manifest(manifest, chunk_counter)
                 add_to_spine(spine, chunk_counter)
                 chunk_counter += 1
                 add_to_manifest(manifest, chunk_counter)
                 add_to_spine(spine, chunk_counter)
                 chunk_counter += 1
@@ -486,7 +503,6 @@ def transform(wldoc, verbose=False,
 
         return toc, chunk_counter, chars, sample
 
 
         return toc, chunk_counter, chars, sample
 
-
     document = deepcopy(wldoc)
     del wldoc
 
     document = deepcopy(wldoc)
     del wldoc
 
@@ -494,9 +510,14 @@ def transform(wldoc, verbose=False,
         for flag in flags:
             document.edoc.getroot().set(flag, 'yes')
 
         for flag in flags:
             document.edoc.getroot().set(flag, 'yes')
 
+    document.clean_ed_note()
+    document.clean_ed_note('abstrakt')
+
     # add editors info
     # add editors info
-    document.edoc.getroot().set('editors', u', '.join(sorted(
-        editor.readable() for editor in document.editors())))
+    editors = document.editors()
+    if editors:
+        document.edoc.getroot().set('editors', u', '.join(sorted(
+            editor.readable() for editor in editors)))
     if document.book_info.funders:
         document.edoc.getroot().set('funders', u', '.join(
             document.book_info.funders))
     if document.book_info.funders:
         document.edoc.getroot().set('funders', u', '.join(
             document.book_info.funders))
@@ -511,28 +532,47 @@ def transform(wldoc, verbose=False,
     output_file = NamedTemporaryFile(prefix='librarian', suffix='.epub', delete=False)
     zip = zipfile.ZipFile(output_file, 'w', zipfile.ZIP_DEFLATED)
 
     output_file = NamedTemporaryFile(prefix='librarian', suffix='.epub', delete=False)
     zip = zipfile.ZipFile(output_file, 'w', zipfile.ZIP_DEFLATED)
 
+    functions.reg_mathml_epub(zip)
+
+    if os.path.isdir(ilustr_path):
+        ilustr_elements = set(ilustr.get('src') for ilustr in document.edoc.findall('//ilustr'))
+        for i, filename in enumerate(os.listdir(ilustr_path)):
+            if filename not in ilustr_elements:
+                continue
+            file_path = os.path.join(ilustr_path, filename)
+            zip.write(file_path, os.path.join('OPS', filename))
+            image_id = 'image%s' % i
+            manifest.append(etree.fromstring(
+                '<item id="%s" href="%s" media-type="%s" />' % (image_id, filename, guess_type(file_path)[0])))
+
     # write static elements
     mime = zipfile.ZipInfo()
     mime.filename = 'mimetype'
     mime.compress_type = zipfile.ZIP_STORED
     # write static elements
     mime = zipfile.ZipInfo()
     mime.filename = 'mimetype'
     mime.compress_type = zipfile.ZIP_STORED
-    mime.extra = ''
-    zip.writestr(mime, 'application/epub+zip')
-    zip.writestr('META-INF/container.xml', '<?xml version="1.0" ?><container version="1.0" ' \
-                       'xmlns="urn:oasis:names:tc:opendocument:xmlns:container">' \
-                       '<rootfiles><rootfile full-path="OPS/content.opf" ' \
-                       'media-type="application/oebps-package+xml" />' \
-                       '</rootfiles></container>')
-    zip.write(get_resource('res/wl-logo-small.png'), os.path.join('OPS', 'logo_wolnelektury.png'))
-    zip.write(get_resource('res/jedenprocent.png'), os.path.join('OPS', 'jedenprocent.png'))
+    mime.extra = b''
+    zip.writestr(mime, b'application/epub+zip')
+    zip.writestr(
+        'META-INF/container.xml',
+        b'<?xml version="1.0" ?>'
+        b'<container version="1.0" '
+        b'xmlns="urn:oasis:names:tc:opendocument:xmlns:container">'
+        b'<rootfiles><rootfile full-path="OPS/content.opf" '
+        b'media-type="application/oebps-package+xml" />'
+        b'</rootfiles></container>'
+    )
+    zip.write(get_resource('res/wl-logo-small.png'),
+              os.path.join('OPS', 'logo_wolnelektury.png'))
+    zip.write(get_resource('res/jedenprocent.png'),
+              os.path.join('OPS', 'jedenprocent.png'))
     if not style:
         style = get_resource('epub/style.css')
     zip.write(style, os.path.join('OPS', 'style.css'))
 
     if cover:
         if cover is True:
     if not style:
         style = get_resource('epub/style.css')
     zip.write(style, os.path.join('OPS', 'style.css'))
 
     if cover:
         if cover is True:
-            cover = DefaultEbookCover
+            cover = make_cover
 
 
-        cover_file = StringIO()
+        cover_file = BytesIO()
         bound_cover = cover(document.book_info)
         bound_cover.save(cover_file)
         cover_name = 'cover.%s' % bound_cover.ext()
         bound_cover = cover(document.book_info)
         bound_cover.save(cover_file)
         cover_name = 'cover.%s' % bound_cover.ext()
@@ -542,9 +582,11 @@ def transform(wldoc, verbose=False,
         cover_tree = etree.parse(get_resource('epub/cover.html'))
         cover_tree.find('//' + XHTMLNS('img')).set('src', cover_name)
         zip.writestr('OPS/cover.html', etree.tostring(
         cover_tree = etree.parse(get_resource('epub/cover.html'))
         cover_tree.find('//' + XHTMLNS('img')).set('src', cover_name)
         zip.writestr('OPS/cover.html', etree.tostring(
-                        cover_tree, pretty_print = True, xml_declaration = True, encoding = "utf-8",
-                       doctype='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" ' +
-                            '"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">'))
+            cover_tree, pretty_print=True, xml_declaration=True,
+            encoding="utf-8",
+            doctype='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" ' +
+                    '"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">'
+        ))
 
         if bound_cover.uses_dc_cover:
             if document.book_info.cover_by:
 
         if bound_cover.uses_dc_cover:
             if document.book_info.cover_by:
@@ -560,14 +602,16 @@ def transform(wldoc, verbose=False,
         opf.getroot()[0].append(etree.fromstring('<meta name="cover" content="cover-image"/>'))
         guide.append(etree.fromstring('<reference href="cover.html" type="cover" title="Okładka"/>'))
 
         opf.getroot()[0].append(etree.fromstring('<meta name="cover" content="cover-image"/>'))
         guide.append(etree.fromstring('<reference href="cover.html" type="cover" title="Okładka"/>'))
 
-
     annotations = etree.Element('annotations')
 
     annotations = etree.Element('annotations')
 
-    toc_file = etree.fromstring('<?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 xmlns="http://www.daisy.org/z3986/2005/ncx/" xml:lang="pl" ' \
-                               'version="2005-1"><head></head><docTitle></docTitle><navMap>' \
-                               '</navMap></ncx>')
+    toc_file = etree.fromstring(
+        b'<?xml version="1.0" encoding="utf-8"?><!DOCTYPE ncx PUBLIC '
+        b'"-//NISO//DTD ncx 2005-1//EN" '
+        b'"http://www.daisy.org/z3986/2005/ncx-2005-1.dtd">'
+        b'<ncx xmlns="http://www.daisy.org/z3986/2005/ncx/" xml:lang="pl" '
+        b'version="2005-1"><head></head><docTitle></docTitle><navMap>'
+        b'</navMap></ncx>'
+    )
     nav_map = toc_file[-1]
 
     if html_toc:
     nav_map = toc_file[-1]
 
     if html_toc:
@@ -593,36 +637,36 @@ def transform(wldoc, verbose=False,
         html_tree = xslt(annotations, get_resource('epub/xsltAnnotations.xsl'))
         chars = chars.union(used_chars(html_tree.getroot()))
         zip.writestr('OPS/annotations.html', etree.tostring(
         html_tree = xslt(annotations, get_resource('epub/xsltAnnotations.xsl'))
         chars = chars.union(used_chars(html_tree.getroot()))
         zip.writestr('OPS/annotations.html', etree.tostring(
-                            html_tree, pretty_print = True,
-                               xml_declaration = True,
-                               encoding = "utf-8",
-                               doctype='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" ' +
-                            '"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">'))
+            html_tree, pretty_print=True, xml_declaration=True,
+            encoding="utf-8",
+            doctype='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" ' +
+                    '"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">'
+        ))
 
     toc.add("Wesprzyj Wolne Lektury", "support.html")
     manifest.append(etree.fromstring(
         '<item id="support" href="support.html" media-type="application/xhtml+xml" />'))
     spine.append(etree.fromstring(
         '<itemref idref="support" />'))
 
     toc.add("Wesprzyj Wolne Lektury", "support.html")
     manifest.append(etree.fromstring(
         '<item id="support" href="support.html" media-type="application/xhtml+xml" />'))
     spine.append(etree.fromstring(
         '<itemref idref="support" />'))
-    html_string = open(get_resource('epub/support.html')).read()
+    html_string = open(get_resource('epub/support.html'), 'rb').read()
     chars.update(used_chars(etree.fromstring(html_string)))
     chars.update(used_chars(etree.fromstring(html_string)))
-    zip.writestr('OPS/support.html', html_string)
+    zip.writestr('OPS/support.html', squeeze_whitespace(html_string))
 
     toc.add("Strona redakcyjna", "last.html")
     manifest.append(etree.fromstring(
         '<item id="last" href="last.html" media-type="application/xhtml+xml" />'))
     spine.append(etree.fromstring(
         '<itemref idref="last" />'))
 
     toc.add("Strona redakcyjna", "last.html")
     manifest.append(etree.fromstring(
         '<item id="last" href="last.html" media-type="application/xhtml+xml" />'))
     spine.append(etree.fromstring(
         '<itemref idref="last" />'))
-    html_tree = xslt(document.edoc, get_resource('epub/xsltLast.xsl'))
+    html_tree = xslt(document.edoc, get_resource('epub/xsltLast.xsl'), outputtype=output_type)
     chars.update(used_chars(html_tree.getroot()))
     chars.update(used_chars(html_tree.getroot()))
-    zip.writestr('OPS/last.html', etree.tostring(
-                        html_tree, pretty_print = True,
-                       xml_declaration = True,
-                       encoding = "utf-8",
-                       doctype='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" ' +
-                            '"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">'))
-
-    if not flags or not 'without-fonts' in flags:
+    zip.writestr('OPS/last.html', squeeze_whitespace(etree.tostring(
+        html_tree, pretty_print=True, xml_declaration=True,
+        encoding="utf-8",
+        doctype='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" ' +
+                '"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">'
+    )))
+
+    if not flags or 'without-fonts' not in flags:
         # strip fonts
         tmpdir = mkdtemp('-librarian-epub')
         try:
         # strip fonts
         tmpdir = mkdtemp('-librarian-epub')
         try:
@@ -632,25 +676,25 @@ def transform(wldoc, verbose=False,
 
         os.chdir(os.path.join(os.path.dirname(os.path.realpath(__file__)), 'font-optimizer'))
         for fname in 'DejaVuSerif.ttf', 'DejaVuSerif-Bold.ttf', 'DejaVuSerif-Italic.ttf', 'DejaVuSerif-BoldItalic.ttf':
 
         os.chdir(os.path.join(os.path.dirname(os.path.realpath(__file__)), 'font-optimizer'))
         for fname in 'DejaVuSerif.ttf', 'DejaVuSerif-Bold.ttf', 'DejaVuSerif-Italic.ttf', 'DejaVuSerif-BoldItalic.ttf':
-            if not flags or not 'with-full-fonts' in flags:
-                optimizer_call = ['perl', 'subset.pl', '--chars', ''.join(chars).encode('utf-8'),
-                              get_resource('fonts/' + fname), os.path.join(tmpdir, fname)]              
-                if verbose:
-                    print "Running font-optimizer"
-                    subprocess.check_call(optimizer_call)
-                else:
-                    subprocess.check_call(optimizer_call, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
-                    zip.write(os.path.join(tmpdir, fname), os.path.join('OPS', fname))
+            optimizer_call = ['perl', 'subset.pl', '--chars',
+                              ''.join(chars).encode('utf-8'),
+                              get_resource('fonts/' + fname),
+                              os.path.join(tmpdir, fname)]
+            env = {"PERL_USE_UNSAFE_INC": "1"}
+            if verbose:
+                print("Running font-optimizer")
+                subprocess.check_call(optimizer_call, env=env)
             else:
             else:
-                zip.write(get_resource('fonts/' + fname), os.path.join('OPS', fname))
+                dev_null = open(os.devnull, 'w')
+                subprocess.check_call(optimizer_call, stdout=dev_null, stderr=dev_null, env=env)
+            zip.write(os.path.join(tmpdir, fname), os.path.join('OPS', fname))
             manifest.append(etree.fromstring(
                 '<item id="%s" href="%s" media-type="application/x-font-truetype" />' % (fname, fname)))
         rmtree(tmpdir)
         if cwd is not None:
             os.chdir(cwd)
             manifest.append(etree.fromstring(
                 '<item id="%s" href="%s" media-type="application/x-font-truetype" />' % (fname, fname)))
         rmtree(tmpdir)
         if cwd is not None:
             os.chdir(cwd)
-    zip.writestr('OPS/content.opf', etree.tostring(opf, pretty_print = True,
-                    xml_declaration = True,
-                    encoding = "utf-8"))
+    zip.writestr('OPS/content.opf', etree.tostring(opf, pretty_print=True,
+                 xml_declaration=True, encoding="utf-8"))
     title = document.book_info.title
     attributes = "dtb:uid", "dtb:depth", "dtb:totalPageCount", "dtb:maxPageNumber"
     for st in attributes:
     title = document.book_info.title
     attributes = "dtb:uid", "dtb:depth", "dtb:totalPageCount", "dtb:maxPageNumber"
     for st in attributes:
@@ -667,9 +711,8 @@ def transform(wldoc, verbose=False,
         toc.add(u"Spis treści", "toc.html", index=1)
         zip.writestr('OPS/toc.html', toc.html().encode('utf-8'))
     toc.write_to_xml(nav_map)
         toc.add(u"Spis treści", "toc.html", index=1)
         zip.writestr('OPS/toc.html', toc.html().encode('utf-8'))
     toc.write_to_xml(nav_map)
-    zip.writestr('OPS/toc.ncx', etree.tostring(toc_file, pretty_print = True,
-                    xml_declaration = True,
-                    encoding = "utf-8"))
+    zip.writestr('OPS/toc.ncx', etree.tostring(toc_file, pretty_print=True,
+                 xml_declaration=True, encoding="utf-8"))
     zip.close()
 
     return OutputFile.from_filename(output_file.name)
     zip.close()
 
     return OutputFile.from_filename(output_file.name)