Epub: only attach images referenced in the text.

[librarian.git] / librarian / picture.py

diff --git a/librarian/picture.py b/librarian/picture.py
index 7830528..10d2ae7 100644 (file)
--- a/librarian/picture.py
+++ b/librarian/picture.py
@@ -1,28 +1,29 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals

 
 

-from dcparser import (as_person, as_date, Field, WorkInfo, DCNS)
+from operator import and_
+
+from .dcparser import Field, WorkInfo, DCNS

 from librarian import (RDFNS, ValidationError, NoDublinCore, ParseError, WLURI)
 from xml.parsers.expat import ExpatError
 from os import path
 from librarian import (RDFNS, ValidationError, NoDublinCore, ParseError, WLURI)
 from xml.parsers.expat import ExpatError
 from os import path

-from StringIO import StringIO

 from lxml import etree
 from lxml import etree

-from lxml.etree import (XMLSyntaxError, XSLTApplyError)
+from lxml.etree import (XMLSyntaxError, XSLTApplyError, Element)

 import re
 import re

+import six

 
 
 class WLPictureURI(WLURI):
 
 
 class WLPictureURI(WLURI):

-    _re_wl_uri = re.compile('http://wolnelektury.pl/katalog/obraz/'
-            '(?P<slug>[-a-z0-9]+)(/(?P<lang>[a-z]{3}))?/?$')
-
-    def __init__(self, *args, **kw):
-        super(WLPictureURI, self).__init__(*args, **kw)
+    _re_wl_uri = re.compile('http://wolnelektury.pl/katalog/obraz/(?P<slug>[-a-z0-9]+)/?$')

 
     @classmethod
 
     @classmethod

-    def from_slug_and_lang(cls, slug, lang):
+    def from_slug(cls, slug):

         uri = 'http://wolnelektury.pl/katalog/obraz/%s/' % slug
         return cls(uri)
 
         uri = 'http://wolnelektury.pl/katalog/obraz/%s/' % slug
         return cls(uri)
 

-    def filename_stem(self):
-        return self.slug
+
+def as_wlpictureuri_strict(text):
+    return WLPictureURI.strict(text)

 
 
 class PictureInfo(WorkInfo):
 
 
 class PictureInfo(WorkInfo):


@@ -30,24 +31,25 @@ class PictureInfo(WorkInfo):
     Dublin core metadata for a picture
     """
     FIELDS = (
     Dublin core metadata for a picture
     """
     FIELDS = (

-        Field(DCNS('format.dimensions.digital'), 'dimensions', required=False),
-        Field(DCNS('format.dimensions.original'), 'dimensions_original', required=False),
-        Field(DCNS('format.physical'), 'physical', required=False),
+        Field(DCNS('language'), 'language', required=False),
+        Field(DCNS('subject.period'), 'epochs', salias='epoch', multiple=True),
+        Field(DCNS('subject.type'), 'kinds', salias='kind', multiple=True),
+        Field(DCNS('subject.genre'), 'genres', salias='genre', multiple=True, required=False),
+        Field(DCNS('subject.style'), 'styles', salias='style', multiple=True, required=False),
+
+        Field(DCNS('format.dimensions'), 'dimensions', required=False),
+        Field(DCNS('format.checksum.sha1'), 'sha1', required=True),
+        Field(DCNS('description.medium'), 'medium', required=False),
+        Field(DCNS('description.dimensions'), 'original_dimensions', required=False),

         Field(DCNS('format'), 'mime_type', required=False),
         Field(DCNS('format'), 'mime_type', required=False),

-        Field(DCNS('identifier.url'), 'url', WLPictureURI),
-        )
+        Field(DCNS('identifier.url'), 'url', WLPictureURI, strict=as_wlpictureuri_strict)
+    )

 
 

-    def validate(self):
-        """
-        WorkInfo has a language validation code only, which we do not need.
-        """
-        pass
-    

 
 class ImageStore(object):
     EXT = ['gif', 'jpeg', 'png', 'swf', 'psd', 'bmp'
 
 class ImageStore(object):
     EXT = ['gif', 'jpeg', 'png', 'swf', 'psd', 'bmp'

-            'tiff', 'tiff', 'jpc', 'jp2', 'jpf', 'jb2', 'swc',
-            'aiff', 'wbmp', 'xbm']
+           'tiff', 'tiff', 'jpc', 'jp2', 'jpf', 'jb2', 'swc',
+           'aiff', 'wbmp', 'xbm']

     MIME = ['image/gif', 'image/jpeg', 'image/png',
             'application/x-shockwave-flash', 'image/psd', 'image/bmp',
             'image/tiff', 'image/tiff', 'application/octet-stream',
     MIME = ['image/gif', 'image/jpeg', 'image/png',
             'application/x-shockwave-flash', 'image/psd', 'image/bmp',
             'image/tiff', 'image/tiff', 'application/octet-stream',


@@ -55,8 +57,8 @@ class ImageStore(object):
             'application/x-shockwave-flash', 'image/iff', 'image/vnd.wap.wbmp', 'image/xbm']
 
     def __init__(self, dir_):
             'application/x-shockwave-flash', 'image/iff', 'image/vnd.wap.wbmp', 'image/xbm']
 
     def __init__(self, dir_):

+        super(ImageStore, self).__init__()

         self.dir = dir_
         self.dir = dir_

-        return super(ImageStore, self).__init__()

 
     def path(self, slug, mime_type):
         """
 
     def path(self, slug, mime_type):
         """


@@ -96,16 +98,17 @@ class WLPicture(object):
             self.picture_info = PictureInfo.from_element(self.rdf_elem)
         else:
             self.picture_info = None
             self.picture_info = PictureInfo.from_element(self.rdf_elem)
         else:
             self.picture_info = None

+        self.frame = None

 
     @classmethod
 
     @classmethod

-    def from_string(cls, xml, *args, **kwargs):
-        return cls.from_file(StringIO(xml), *args, **kwargs)
+    def from_bytes(cls, xml, *args, **kwargs):
+        return cls.from_file(six.BytesIO(xml), *args, **kwargs)

 
     @classmethod
     def from_file(cls, xmlfile, parse_dublincore=True, image_store=None):
 
         # first, prepare for parsing
 
     @classmethod
     def from_file(cls, xmlfile, parse_dublincore=True, image_store=None):
 
         # first, prepare for parsing

-        if isinstance(xmlfile, basestring):
+        if isinstance(xmlfile, six.text_type):

             file = open(xmlfile, 'rb')
             try:
                 data = file.read()
             file = open(xmlfile, 'rb')
             try:
                 data = file.read()


@@ -114,21 +117,23 @@ class WLPicture(object):
         else:
             data = xmlfile.read()
 
         else:
             data = xmlfile.read()
 

-        if not isinstance(data, unicode):
+        if not isinstance(data, six.text_type):

             data = data.decode('utf-8')
 
         data = data.replace(u'\ufeff', '')
 
         # assume images are in the same directory
             data = data.decode('utf-8')
 
         data = data.replace(u'\ufeff', '')
 
         # assume images are in the same directory

-        if image_store is None and xmlfile.name is not None:
+        if image_store is None and getattr(xmlfile, 'name', None):

             image_store = ImageStore(path.dirname(xmlfile.name))
 
         try:
             parser = etree.XMLParser(remove_blank_text=False)
             image_store = ImageStore(path.dirname(xmlfile.name))
 
         try:
             parser = etree.XMLParser(remove_blank_text=False)

-            tree = etree.parse(StringIO(data.encode('utf-8')), parser)
+            tree = etree.parse(six.BytesIO(data.encode('utf-8')), parser)

 
 

-            return cls(tree, parse_dublincore=parse_dublincore, image_store=image_store)
-        except (ExpatError, XMLSyntaxError, XSLTApplyError), e:
+            me = cls(tree, parse_dublincore=parse_dublincore, image_store=image_store)
+            me.load_frame_info()
+            return me
+        except (ExpatError, XMLSyntaxError, XSLTApplyError) as e:

             raise ParseError(e)
 
     @property
             raise ParseError(e)
 
     @property


@@ -145,7 +150,64 @@ class WLPicture(object):
     def image_path(self):
         if self.image_store is None:
             raise ValueError("No image store associated with whis WLPicture.")
     def image_path(self):
         if self.image_store is None:
             raise ValueError("No image store associated with whis WLPicture.")

+

         return self.image_store.path(self.slug, self.mime_type)
 
     def image_file(self, *args, **kwargs):
         return self.image_store.path(self.slug, self.mime_type)
 
     def image_file(self, *args, **kwargs):

-        return open(self.image_path, *args, **kwargs)
+        return open(self.image_path, 'rb', *args, **kwargs)
+
+    def get_sem_coords(self, sem):
+        area = sem.find("div[@type='rect']")
+        if area is None:
+            area = sem.find("div[@type='whole']")
+            return [[0, 0], [-1, -1]]
+
+        def has_all_props(node, props):
+            return reduce(and_, map(lambda prop: prop in node.attrib, props))
+
+        if not has_all_props(area, ['x1', 'x2', 'y1', 'y2']):
+            return None
+
+        def n(prop): return int(area.get(prop))
+        return [[n('x1'), n('y1')], [n('x2'), n('y2')]]
+
+    def partiter(self):
+        """
+        Iterates the parts of this picture and returns them and their metadata
+        """
+        # omg no support for //sem[(@type='theme') or (@type='object')] ?
+        for part in list(self.edoc.iterfind("//sem[@type='theme']")) +\
+                list(self.edoc.iterfind("//sem[@type='object']")):
+            pd = {'type': part.get('type')}
+
+            coords = self.get_sem_coords(part)
+            if coords is None:
+                continue
+            pd['coords'] = coords
+
+            def want_unicode(x):
+                if not isinstance(x, six.text_type):
+                    return x.decode('utf-8')
+                else:
+                    return x
+            pd['object'] = part.attrib['type'] == 'object' and want_unicode(part.attrib.get('object', u'')) or None
+            pd['themes'] = part.attrib['type'] == 'theme' and [part.attrib.get('theme', u'')] or []
+            yield pd
+
+    def load_frame_info(self):
+        k = self.edoc.find("//sem[@object='kadr']")
+        
+        if k is not None:
+            clip = self.get_sem_coords(k)
+            self.frame = clip
+            frm = Element("sem", {"type": "frame"})
+            frm.append(k.iter("div").next())
+            self.edoc.getroot().append(frm)
+            k.getparent().remove(k)
+        else:
+            frm = self.edoc.find("//sem[@type='frame']")
+            if frm:
+                self.frame = self.get_sem_coords(frm)
+            else:
+                self.frame = None
+        return self