fix for empty editors

[librarian.git] / librarian / pdf.py

diff --git a/librarian/pdf.py b/librarian/pdf.py
index 169d661..5f28547 100644 (file)
--- a/librarian/pdf.py
+++ b/librarian/pdf.py
@@ -3,122 +3,274 @@
 # 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

 import os
 import os.path
 import shutil
 from StringIO import StringIO
 from tempfile import mkdtemp
 import re
 import os
 import os.path
 import shutil
 from StringIO import StringIO
 from tempfile import mkdtemp
 import re

+from copy import deepcopy
+from subprocess import call, PIPE
+
+import sys

 
 from Texml.processor import process
 from lxml import etree
 from lxml.etree import XMLSyntaxError, XSLTApplyError
 
 
 from Texml.processor import process
 from lxml import etree
 from lxml.etree import XMLSyntaxError, XSLTApplyError
 

+from librarian.dcparser import Person

 from librarian.parser import WLDocument
 from librarian.parser import WLDocument

-from librarian import ParseError
+from librarian import ParseError, DCNS, get_resource

 from librarian import functions
 
 from librarian import functions
 

+

 functions.reg_substitute_entities()
 functions.reg_substitute_entities()

+functions.reg_strip()
+functions.reg_starts_white()
+functions.reg_ends_white()
+functions.reg_texcommand()

 
 STYLESHEETS = {
 
 STYLESHEETS = {

-    'wl2tex': 'xslt/wl2tex.xslt',
+    'wl2tex': 'pdf/wl2tex.xslt',

 }
 
 
 }
 
 

-def insert_tags(doc, split_re, tagname):
-    print tagname
-    for elem in doc.iter():
+def insert_tags(doc, split_re, tagname, exclude=None):
+    """ inserts <tagname> for every occurence of `split_re' in text nodes in the `doc' tree 
+
+    >>> t = etree.fromstring('<a><b>A-B-C</b>X-Y-Z</a>');
+    >>> insert_tags(t, re.compile('-'), 'd');
+    >>> print etree.tostring(t)
+    <a><b>A<d/>B<d/>C</b>X<d/>Y<d/>Z</a>
+    """
+
+    for elem in doc.iter(tag=etree.Element):
+        if exclude and elem.tag in exclude:
+            continue

         if elem.text:
             chunks = split_re.split(elem.text)
         if elem.text:
             chunks = split_re.split(elem.text)

-            elem.text = chunks.pop(0)
-            while chunks:
+            while len(chunks) > 1:

                 ins = etree.Element(tagname)
                 ins.tail = chunks.pop()
                 elem.insert(0, ins)
                 ins = etree.Element(tagname)
                 ins.tail = chunks.pop()
                 elem.insert(0, ins)

+            elem.text = chunks.pop(0)

         if elem.tail:
             chunks = split_re.split(elem.tail)
             parent = elem.getparent()
             ins_index = parent.index(elem) + 1
         if elem.tail:
             chunks = split_re.split(elem.tail)
             parent = elem.getparent()
             ins_index = parent.index(elem) + 1

-            elem.tail = chunks.pop(0)
-            while chunks:
+            while len(chunks) > 1:

                 ins = etree.Element(tagname)
                 ins = etree.Element(tagname)

-                ins.tail = chunks.pop(0)
+                ins.tail = chunks.pop()

                 parent.insert(ins_index, ins)
                 parent.insert(ins_index, ins)

+            elem.tail = chunks.pop(0)

 
 
 def substitute_hyphens(doc):
     insert_tags(doc, 
                 re.compile("(?<=[^-\s])-(?=[^-\s])"),
 
 
 def substitute_hyphens(doc):
     insert_tags(doc, 
                 re.compile("(?<=[^-\s])-(?=[^-\s])"),

-                "dywiz")
+                "dywiz",
+                exclude=[DCNS("identifier.url"), DCNS("rights.license")]
+                )

 
 
 def fix_hanging(doc):
     insert_tags(doc, 
                 re.compile("(?<=\s\w)\s+"),
 
 
 def fix_hanging(doc):
     insert_tags(doc, 
                 re.compile("(?<=\s\w)\s+"),

-                "nbsp")
+                "nbsp",
+                exclude=[DCNS("identifier.url"), DCNS("rights.license")]
+                )
+
+
+def move_motifs_inside(doc):
+    """ moves motifs to be into block elements """
+    for master in doc.xpath('//powiesc|//opowiadanie|//liryka_l|//liryka_lp|//dramat_wierszowany_l|//dramat_wierszowany_lp|//dramat_wspolczesny'):
+        for motif in master.xpath('motyw'):
+            for sib in motif.itersiblings():
+                if sib.tag not in ('sekcja_swiatlo', 'sekcja_asterysk', 'separator_linia', 'begin', 'end', 'motyw', 'extra', 'uwaga'):
+                    # motif shouldn't have a tail - it would be untagged text
+                    motif.tail = None
+                    motif.getparent().remove(motif)
+                    sib.insert(0, motif)
+                    break
+
+
+def hack_motifs(doc):
+    """ dirty hack for the marginpar-creates-orphans LaTeX problem
+    see http://www.latex-project.org/cgi-bin/ltxbugs2html?pr=latex/2304
+
+    moves motifs in stanzas from first verse to second
+    and from next to last to last, then inserts negative vspace before them
+    """
+    for motif in doc.findall('//strofa//motyw'):
+        # find relevant verse-level tag
+        verse, stanza = motif, motif.getparent()
+        while stanza is not None and stanza.tag != 'strofa':
+            verse, stanza = stanza, stanza.getparent()
+        breaks_before = sum(1 for i in verse.itersiblings('br', preceding=True))
+        breaks_after = sum(1 for i in verse.itersiblings('br'))
+        if (breaks_before == 0 and breaks_after > 0) or breaks_after == 1:
+            move_by = 1
+            if breaks_after == 2:
+                move_by += 1
+            moved_motif = deepcopy(motif)
+            motif.tag = 'span'
+            motif.text = None
+            moved_motif.tail = None
+            moved_motif.set('moved', str(move_by))
+
+            for br in verse.itersiblings('br'):
+                if move_by > 1:
+                    move_by -= 1
+                    continue
+                br.addnext(moved_motif)
+                break
+
+
+def parse_creator(doc):
+    """ find all dc:creator and dc.contributor tags and add *_parsed versions with forenames first """
+    for person in doc.xpath("|".join('//dc:'+(tag) for tag in (
+                    'creator', 'contributor.translator', 'contributor.editor', 'contributor.technical_editor')),
+                    namespaces = {'dc': str(DCNS)})[::-1]:
+        if not person.text:
+            continue
+        p = Person.from_text(person.text)
+        person_parsed = deepcopy(person)
+        person_parsed.tag = person.tag + '_parsed'
+        person_parsed.set('sortkey', person.text)
+        person_parsed.text = p.readable()
+        person.getparent().insert(0, person_parsed)

 
 
 def get_stylesheet(name):
 
 
 def get_stylesheet(name):

-    return os.path.join(os.path.dirname(__file__), STYLESHEETS[name])
-
-def transform(provider, slug, output_file=None, output_dir=None):
-    """ produces a pdf file
-
-    provider is a DocProvider
-    either output_file (a file-like object) or output_dir (path to file/dir) should be specified
-    if output_dir is specified, file will be written to <output_dir>/<author>/<slug>.pdf
+    return get_resource(STYLESHEETS[name])
+
+
+def package_available(package, args='', verbose=False):
+    """ check if a verion of a latex package accepting given args is available """  
+    tempdir = mkdtemp('-wl2pdf-test')
+    fpath = os.path.join(tempdir, 'test.tex')
+    f = open(fpath, 'w')
+    f.write(r"""
+        \documentclass{book}
+        \usepackage[%s]{%s}
+        \begin{document}
+        \end{document}
+        """ % (args, package))
+    f.close()
+    if verbose:
+        p = call(['xelatex', '-output-directory', tempdir, fpath])
+    else:
+        p = call(['xelatex', '-interaction=batchmode', '-output-directory', tempdir, fpath], stdout=PIPE, stderr=PIPE)
+    shutil.rmtree(tempdir)
+    return p == 0
+
+
+def transform(provider, slug=None, file_path=None, 
+              output_file=None, output_dir=None, make_dir=False, verbose=False, save_tex=None, morefloats=None):
+    """ produces a PDF file with XeLaTeX
+
+    provider: a DocProvider
+    slug: slug of file to process, available by provider
+    file_path can be provided instead of a slug
+    output_file: file-like object or path to output file
+    output_dir: path to directory to save output file to; either this or output_file must be present
+    make_dir: writes output to <output_dir>/<author>/<slug>.pdf istead of <output_dir>/<slug>.pdf
+    verbose: prints all output from LaTeX
+    save_tex: path to save the intermediary LaTeX file to
+    morefloats (old/new/none): force specific morefloats

     """
 
     # Parse XSLT
     try:
     """
 
     # Parse XSLT
     try:

-        style_filename = get_stylesheet("wl2tex")
-        style = etree.parse(style_filename)
-
-        document = load_including_children(provider, slug)
-
+        if file_path:
+            if slug:
+                raise ValueError('slug or file_path should be specified, not both')
+            document = load_including_children(provider, file_path=file_path)
+        else:
+            if not slug:
+                raise ValueError('either slug or file_path should be specified')
+            document = load_including_children(provider, slug=slug)
+
+        # check for LaTeX packages
+        if morefloats:
+            document.edoc.getroot().set('morefloats', morefloats.lower())
+        elif package_available('morefloats', 'maxfloats=19'):
+            document.edoc.getroot().set('morefloats', 'new')
+
+        # hack the tree
+        move_motifs_inside(document.edoc)
+        hack_motifs(document.edoc)
+        parse_creator(document.edoc)

         substitute_hyphens(document.edoc)
         fix_hanging(document.edoc)
         substitute_hyphens(document.edoc)
         fix_hanging(document.edoc)

-        
-        print etree.tostring(document.edoc)

 
 

-        # if output to dir, create the file
-        if output_dir is not None:
+        # find output dir
+        if make_dir and output_dir is not None:

             author = unicode(document.book_info.author)
             output_dir = os.path.join(output_dir, author)
 
             author = unicode(document.book_info.author)
             output_dir = os.path.join(output_dir, author)
 

+        # wl -> TeXML
+        style_filename = get_stylesheet("wl2tex")
+        style = etree.parse(style_filename)

         texml = document.transform(style)
         del document # no longer needed large object :)
 
         texml = document.transform(style)
         del document # no longer needed large object :)
 

-        temp = mkdtemp('wl2pdf-')
+        # TeXML -> LaTeX
+        temp = mkdtemp('-wl2pdf')

         tex_path = os.path.join(temp, 'doc.tex')
         fout = open(tex_path, 'w')
         tex_path = os.path.join(temp, 'doc.tex')
         fout = open(tex_path, 'w')

-        process(StringIO(texml), fout, 'utf8', 255, 0, 0)
+        process(StringIO(texml), fout, 'utf-8')

         fout.close()
         del texml
 
         fout.close()
         del texml
 

-        print "pdflatex -output-directory %s %s" % (temp, os.path.join(temp, 'doc.tex'))
-        if os.system("pdflatex -output-directory %s %s" % (temp, os.path.join(temp, 'doc.tex'))):
+        if save_tex:
+            shutil.copy(tex_path, save_tex)
+
+        # LaTeX -> PDF
+        shutil.copy(get_resource('pdf/wl.sty'), temp)
+        shutil.copy(get_resource('res/wl-logo.png'), temp)
+
+        cwd = os.getcwd()
+        os.chdir(temp)
+
+        if verbose:
+            p = call(['xelatex', tex_path])
+        else:
+            p = call(['xelatex', '-interaction=batchmode', tex_path], stdout=PIPE, stderr=PIPE)
+        if p:

             raise ParseError("Error parsing .tex file")
 
             raise ParseError("Error parsing .tex file")
 

+        os.chdir(cwd)
+
+        # save the PDF

         pdf_path = os.path.join(temp, 'doc.pdf')
         if output_dir is not None:
             try:
                 os.makedirs(output_dir)
             except OSError:
                 pass
         pdf_path = os.path.join(temp, 'doc.pdf')
         if output_dir is not None:
             try:
                 os.makedirs(output_dir)
             except OSError:
                 pass

-            output_path = os.path.join(output_dir, '%s.pdf' % slug)
+            if slug:
+                output_path = os.path.join(output_dir, '%s.pdf' % slug)
+            else:
+                output_path = os.path.join(output_dir, os.path.splitext(os.path.basename(file_path))[0] + '.pdf')

             shutil.move(pdf_path, output_path)
         else:
             shutil.move(pdf_path, output_path)
         else:

-            with open(pdf_path) as f:
-                output_file.write(f.read())
-            output_file.close()
+            if hasattr(output_file, 'write'):
+                # file-like object
+                with open(pdf_path) as f:
+                    output_file.write(f.read())
+                output_file.close()
+            else:
+                # path to output file
+                shutil.copy(pdf_path, output_file)
+        shutil.rmtree(temp)

 
 

-        return True

     except (XMLSyntaxError, XSLTApplyError), e:
         raise ParseError(e)
 
 
     except (XMLSyntaxError, XSLTApplyError), e:
         raise ParseError(e)
 
 

-def load_including_children(provider, slug=None, uri=None):
+def load_including_children(provider, slug=None, uri=None, file_path=None):

     """ makes one big xml file with children inserted at end 
     either slug or uri must be provided
     """
     """ makes one big xml file with children inserted at end 
     either slug or uri must be provided
     """


@@ -127,31 +279,20 @@ def load_including_children(provider, slug=None, uri=None):
         f = provider.by_uri(uri)
     elif slug:
         f = provider[slug]
         f = provider.by_uri(uri)
     elif slug:
         f = provider[slug]

+    elif file_path:
+        f = open(file_path, 'r')

     else:
     else:

-        raise ValueError('Neither slug nor URI provided for a book.')
+        raise ValueError('Neither slug, URI nor file path provided for a book.')
+
+    text = f.read().decode('utf-8')
+    text = re.sub(ur"([\u0400-\u04ff]+)", ur"<alien>\1</alien>", text)

 
 

-    document = WLDocument.from_file(f, True,
-        parse_dublincore=True,
-        preserve_lines=False)
+    document = WLDocument.from_string(text, True,
+        parse_dublincore=True)

 
 

+    f.close()

     for child_uri in document.book_info.parts:
     for child_uri in document.book_info.parts:

+        print child_uri

         child = load_including_children(provider, uri=child_uri)
         document.edoc.getroot().append(child.edoc.getroot())
         child = load_including_children(provider, uri=child_uri)
         document.edoc.getroot().append(child.edoc.getroot())

-

     return document
     return document

-
-
-if __name__ == '__main__':
-    import sys
-    from librarian import DirDocProvider
-
-    if len(sys.argv) < 2:
-        print >> sys.stderr, 'Usage: python pdf.py <input file>'
-        sys.exit(1)
-
-    main_input = sys.argv[1]
-    basepath, ext = os.path.splitext(main_input)
-    path, slug = os.path.realpath(basepath).rsplit('/', 1)
-    provider = DirDocProvider(path)
-    transform(provider, slug, output_dir=path)
-