local changes from ve
[librarian.git] / librarian / pdf.py
index b3725b4..03879fe 100644 (file)
@@ -3,25 +3,29 @@
 # This file is part of Librarian, licensed under GNU Affero GPLv3 or later.
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #
+"""PDF creation library.
+
+Creates one big XML from the book and its children, converts it to LaTeX
+with TeXML, then runs it by XeLaTeX.
+
+"""
 from __future__ import with_statement
 import os
 import os.path
 import shutil
 from StringIO import StringIO
-from tempfile import mkdtemp
+from tempfile import mkdtemp, NamedTemporaryFile
 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 librarian.dcparser import Person
 from librarian.parser import WLDocument
-from librarian import ParseError, DCNS, get_resource
+from librarian import ParseError, DCNS, get_resource, IOFile, Format
 from librarian import functions
 
 
@@ -35,7 +39,6 @@ STYLESHEETS = {
     'wl2tex': 'pdf/wl2tex.xslt',
 }
 
-
 def insert_tags(doc, split_re, tagname, exclude=None):
     """ inserts <tagname> for every occurence of `split_re' in text nodes in the `doc' tree
 
@@ -70,7 +73,7 @@ def substitute_hyphens(doc):
     insert_tags(doc,
                 re.compile("(?<=[^-\s])-(?=[^-\s])"),
                 "dywiz",
-                exclude=[DCNS("identifier.url"), DCNS("rights.license")]
+                exclude=[DCNS("identifier.url"), DCNS("rights.license"), 'www']
                 )
 
 
@@ -128,9 +131,13 @@ def hack_motifs(doc):
 
 
 def parse_creator(doc):
-    """ find all dc:creator and dc.contributor tags and add *_parsed versions with forenames first """
+    """Generates readable versions of creator and translator tags.
+
+    Finds all dc:creator and dc.contributor.translator tags
+    and adds *_parsed versions with forenames first.
+    """
     for person in doc.xpath("|".join('//dc:'+(tag) for tag in (
-                    'creator', 'contributor.translator', 'contributor.editor', 'contributor.technical_editor')),
+                    'creator', 'contributor.translator')),
                     namespaces = {'dc': str(DCNS)})[::-1]:
         if not person.text:
             continue
@@ -166,47 +173,67 @@ def package_available(package, args='', verbose=False):
     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,
-              cover=None, flags=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
-    cover: a cover.Cover object
-    flags: less-advertising,
+def load_including_children(wldoc=None, provider=None, uri=None):
+    """ Makes one big xml file with children inserted at end.
+
+    Either wldoc or provider and URI must be provided.
     """
 
-    # Parse XSLT
-    try:
-        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)
-
-        if cover:
-            document.edoc.getroot().set('data-cover-width', str(cover.width))
-            document.edoc.getroot().set('data-cover-height', str(cover.height))
-        if flags:
-            for flag in flags:
-                document.edoc.getroot().set('flag-' + flag, 'yes')
-
-        # 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')
+    if uri and provider:
+        f = provider.by_uri(uri)
+        text = f.read().decode('utf-8')
+        f.close()
+    elif wldoc is not None:
+        text = etree.tostring(wldoc.edoc, encoding=unicode)
+        provider = wldoc.provider
+    else:
+        raise ValueError('Neither a WLDocument, nor provider and URI were provided.')
+
+    text = re.sub(ur"([\u0400-\u04ff]+)", ur"<alien>\1</alien>", text)
+
+    document = WLDocument.from_string(text,
+                parse_dublincore=True, provider=provider)
+    document.swap_endlines()
+
+    for child_uri in document.book_info.parts:
+        child = load_including_children(provider=provider, uri=child_uri)
+        document.edoc.getroot().append(child.edoc.getroot())
+    return document
+
+
+class PDFFormat(Format):
+    """ Base PDF format.
+
+    Available customization:
+        nofootnotes: Doesn't do footnotes.
+        nothemes: Doesn't do themes.
+        defaultleading: Default leading.
+        onehalfleading: Bigger leading.
+        doubleleading: Big leading.
+        nowlfont: Uses standard TeX font instead of JUnicodeWL.
+
+    """
+
+    cover_class = None
+    tex_passes = 1
+    style = get_resource('pdf/default.sty')
+    cover = None
+
+    @property
+    def has_cover(self):
+        """ For use in XSLT. """
+        return self.cover is not None
+
+    @property
+    def customization_str(self):
+        """ For use in XSLT. """
+        return u','.join(k for k, v in self.customization.items() if v)
+
+    def get_document(self):
+        document = load_including_children(self.wldoc)
+        root = document.edoc.getroot()
+        root.set('editors', u', '.join(sorted(
+            editor.readable() for editor in document.editors())))
 
         # hack the tree
         move_motifs_inside(document.edoc)
@@ -214,102 +241,78 @@ def transform(provider, slug=None, file_path=None,
         parse_creator(document.edoc)
         substitute_hyphens(document.edoc)
         fix_hanging(document.edoc)
+        return document
 
-        # 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)
-
-        # wl -> TeXML
+    def get_texml(self):
         style_filename = get_stylesheet("wl2tex")
-        style = etree.parse(style_filename)
-        texml = document.transform(style)
-
-        # TeXML -> LaTeX
+        functions.reg_get(self)
+        try:
+            style = etree.parse(style_filename)
+            texml = self.get_document().transform(style)
+            return texml
+        except (XMLSyntaxError, XSLTApplyError), e:
+            raise ParseError(e)
+
+    def get_tex_dir(self):
+        texml = self.get_texml()
         temp = mkdtemp('-wl2pdf')
-
-        if cover:
-            c = cover(document.book_info.author.readable(), document.book_info.title)
-            with open(os.path.join(temp, 'cover.png'), 'w') as f:
-                c.save(f)
-
-        del document # no longer needed large object :)
-
+        # Save TeX file
         tex_path = os.path.join(temp, 'doc.tex')
-        fout = open(tex_path, 'w')
-        process(StringIO(texml), fout, 'utf-8')
-        fout.close()
-        del texml
-
-        if save_tex:
-            shutil.copy(tex_path, save_tex)
-
-        # LaTeX -> PDF
+        with open(tex_path, 'w') as fout:
+            process(StringIO(texml), fout, 'utf-8')
+        if self.save_tex:
+            shutil.copy(tex_path, self.save_tex)
+        # Copy style
         shutil.copy(get_resource('pdf/wl.cls'), temp)
-        shutil.copy(get_resource('res/wl-logo.png'), temp)
+        shutil.copy(self.style, os.path.join(temp, 'style.sty'))
+        #for sfile in ['wasysym.sty', 'uwasyvar.fd', 'uwasy.fd']:
+        #    shutil.copy(get_resource(os.path.join('res/wasysym', sfile)), temp)
+
+        # Save attachments
+        if self.cover:
+            self.cover.for_pdf().dump_to(os.path.join(temp, 'makecover.sty'))
+        return temp
 
-        cwd = os.getcwd()
+    def get_pdf(self):
+        temp = self.get_tex_dir()
+        tex_path = os.path.join(temp, 'doc.tex')
+        try:
+            cwd = os.getcwd()
+        except OSError:
+            cwd = None
         os.chdir(temp)
 
-        if verbose:
-            p = call(['xelatex', tex_path])
+        if self.verbose:
+            for i in range(self.tex_passes):
+                p = call(['xelatex', tex_path])
         else:
-            p = call(['xelatex', '-interaction=batchmode', tex_path], stdout=PIPE, stderr=PIPE)
+            for i in range(self.tex_passes):
+                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: %s" % tex_path)
 
-        os.chdir(cwd)
+        if cwd is not None:
+            os.chdir(cwd)
 
-        # save the PDF
+        output_file = NamedTemporaryFile(prefix='librarian', suffix='.pdf', delete=False)
         pdf_path = os.path.join(temp, 'doc.pdf')
-        if output_dir is not None:
-            try:
-                os.makedirs(output_dir)
-            except OSError:
-                pass
-            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:
-            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.move(pdf_path, output_file.name)
         shutil.rmtree(temp)
+        return IOFile.from_filename(output_file.name)
 
-    except (XMLSyntaxError, XSLTApplyError), e:
-        raise ParseError(e)
-
-
-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
-    """
-
-    if uri:
-        f = provider.by_uri(uri)
-    elif slug:
-        f = provider[slug]
-    elif file_path:
-        f = open(file_path, 'r')
-    else:
-        raise ValueError('Neither slug, URI nor file path provided for a book.')
+    def build(self, verbose=False, save_tex=None, morefloats=None):
+        """ morefloats: new/old/none
+        """
+        self.verbose = verbose
+        self.save_tex = save_tex
 
-    text = f.read().decode('utf-8')
-    text = re.sub(ur"([\u0400-\u04ff]+)", ur"<alien>\1</alien>", text)
+        if morefloats is None and package_available('morefloats', 'maxfloats=19'):
+            morefloats = 'new'
+        self.morefloats = morefloats
 
-    document = WLDocument.from_string(text, True,
-        parse_dublincore=True)
+        book_info = self.wldoc.book_info
+        if self.cover_class:
+            self.cover = self.cover_class(book_info)
 
-    f.close()
-    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())
-    return document
+        return self.get_pdf()