Move HTML from the old transform sheet.
[librarian.git] / src / librarian / picture.py
diff --git a/src/librarian/picture.py b/src/librarian/picture.py
deleted file mode 100644 (file)
index 8b2c882..0000000
+++ /dev/null
@@ -1,238 +0,0 @@
-# This file is part of Librarian, licensed under GNU Affero GPLv3 or later.
-# Copyright © Fundacja Wolne Lektury. See NOTICE for more information.
-#
-from operator import and_
-import functools
-import io
-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 lxml import etree
-from lxml.etree import (XMLSyntaxError, XSLTApplyError, Element)
-import re
-
-
-class WLPictureURI(WLURI):
-    _re_wl_uri = re.compile(
-        'http://wolnelektury.pl/katalog/obraz/(?P<slug>[-a-z0-9]+)/?$'
-    )
-    template = 'http://wolnelektury.pl/katalog/obraz/%s/'
-
-
-def as_wlpictureuri_strict(text):
-    return WLPictureURI.strict(text)
-
-
-class PictureInfo(WorkInfo):
-    """
-    Dublin core metadata for a picture
-    """
-    FIELDS = (
-        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('identifier.url'), 'url', WLPictureURI,
-              strict=as_wlpictureuri_strict)
-    )
-
-
-class ImageStore:
-    EXT = ['gif', 'jpeg', 'png', 'swf', 'psd', 'bmp'
-           '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',
-            'image/jp2', 'application/octet-stream',
-            'application/octet-stream', 'application/x-shockwave-flash',
-            'image/iff', 'image/vnd.wap.wbmp', 'image/xbm']
-
-    def __init__(self, dir_):
-        super(ImageStore, self).__init__()
-        self.dir = dir_
-
-    def path(self, slug, mime_type):
-        """
-        Finds file by slug and mime type in our iamge store.
-        Returns a file objects (perhaps should return a filename?)
-        """
-        try:
-            i = self.MIME.index(mime_type)
-        except ValueError:
-            err = ValueError(
-                "Picture %s has unknown mime type: %s"
-                % (slug, mime_type)
-            )
-            err.slug = slug
-            err.mime_type = mime_type
-            raise err
-        ext = self.EXT[i]
-        # add some common extensions tiff->tif, jpeg->jpg
-        return path.join(self.dir, slug + '.' + ext)
-
-
-class WLPicture:
-    def __init__(self, edoc, parse_dublincore=True, image_store=None):
-        self.edoc = edoc
-        self.image_store = image_store
-
-        root_elem = edoc.getroot()
-
-        dc_path = './/' + RDFNS('RDF')
-
-        if root_elem.tag != 'picture':
-            raise ValidationError(
-                "Invalid root element. Found '%s', should be 'picture'"
-                % root_elem.tag
-            )
-
-        if parse_dublincore:
-            self.rdf_elem = root_elem.find(dc_path)
-
-            if self.rdf_elem is None:
-                raise NoDublinCore(
-                    "Document has no DublinCore - which is required."
-                )
-
-            self.picture_info = PictureInfo.from_element(self.rdf_elem)
-        else:
-            self.picture_info = None
-        self.frame = None
-
-    @classmethod
-    def from_bytes(cls, xml, *args, **kwargs):
-        return cls.from_file(io.BytesIO(xml), *args, **kwargs)
-
-    @classmethod
-    def from_file(cls, xmlfile, parse_dublincore=True, image_store=None):
-
-        # first, prepare for parsing
-        if isinstance(xmlfile, str):
-            file = open(xmlfile, 'rb')
-            try:
-                data = file.read()
-            finally:
-                file.close()
-        else:
-            data = xmlfile.read()
-
-        if not isinstance(data, str):
-            data = data.decode('utf-8')
-
-        data = data.replace('\ufeff', '')
-
-        # assume images are in the same directory
-        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)
-            tree = etree.parse(io.BytesIO(data.encode('utf-8')), parser)
-
-            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
-    def mime_type(self):
-        if self.picture_info is None:
-            raise ValueError(
-                "DC is not loaded, hence we don't know the image type."
-            )
-        return self.picture_info.mime_type
-
-    @property
-    def slug(self):
-        return self.picture_info.url.slug
-
-    @property
-    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 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 functools.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, str):
-                    return x.decode('utf-8')
-                else:
-                    return x
-            pd['object'] = (
-                part.attrib['type'] == 'object'
-                and want_unicode(part.attrib.get('object', ''))
-                or None
-            )
-            pd['themes'] = (
-                part.attrib['type'] == 'theme'
-                and [part.attrib.get('theme', '')]
-                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(next(k.iter("div")))
-            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