+
−"""Specific views for entities implementing IDownloadable
+
−
+
−:organization: Logilab
+
−:copyright: 2001-2010 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
+
−:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
+
−:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
+
−"""
+
−__docformat__ = "restructuredtext en"
+
−_ = unicode
+
−
+
−from logilab.mtconverter import BINARY_ENCODINGS, TransformError, xml_escape
+
−
+
−from cubicweb.view import EntityView
+
−from cubicweb.selectors import (one_line_rset, score_entity,
+
−                                implements, match_context_prop)
+
−from cubicweb.interfaces import IDownloadable
+
−from cubicweb.mttransforms import ENGINE
+
−from cubicweb.web.box import EntityBoxTemplate
+
−from cubicweb.web.views import primary, baseviews
+
−
+
−
+
−def is_image(entity):
+
−    mt = entity.download_content_type()
+
−    if not (mt and mt.startswith('image/')):
+
−        return 0
+
−    return 1
+
−
+
−def download_box(w, entity, title=None, label=None, footer=u''):
+
−    req = entity._cw
+
−    w(u'<div class="sideBox">')
+
−    if title is None:
+
−        title = req._('download')
+
−    w(u'<div class="sideBoxTitle downloadBoxTitle"><span>%s</span></div>'
+
−      % xml_escape(title))
+
−    w(u'<div class="sideBox downloadBox"><div class="sideBoxBody">')
+
−    w(u'<a href="%s"><img src="%s" alt="%s"/> %s</a>'
+
−      % (xml_escape(entity.download_url()),
+
−         req.external_resource('DOWNLOAD_ICON'),
+
−         _('download icon'), xml_escape(label or entity.dc_title())))
+
−    w(u'%s</div>' % footer)
+
−    w(u'</div></div>\n')
+
−
+
−
+
−class DownloadBox(EntityBoxTemplate):
+
−    __regid__ = 'download_box'
+
−    # no download box for images
+
−    # XXX primary_view selector ?
+
−    __select__ = (one_line_rset() & implements(IDownloadable) &
+
−                  match_context_prop() & ~score_entity(is_image))
+
−    order = 10
+
−
+
−    def cell_call(self, row, col, title=None, label=None, **kwargs):
+
−        entity = self.cw_rset.get_entity(row, col)
+
−        download_box(self.w, entity, title, label)
+
−
+
−
+
−class DownloadView(EntityView):
+
−    """this view is replacing the deprecated 'download' controller and allow
+
−    downloading of entities providing the necessary interface
+
−    """
+
−    __regid__ = 'download'
+
−    __select__ = one_line_rset() & implements(IDownloadable)
+
−
+
−    templatable = False
+
−    content_type = 'application/octet-stream'
+
−    binary = True
+
−    add_to_breadcrumbs = False
+
−
+
−    def set_request_content_type(self):
+
−        """overriden to set the correct filetype and filename"""
+
−        entity = self.cw_rset.complete_entity(0, 0)
+
−        encoding = entity.download_encoding()
+
−        if encoding in BINARY_ENCODINGS:
+
−            contenttype = 'application/%s' % encoding
+
−            encoding = None
+
−        else:
+
−            contenttype = entity.download_content_type()
+
−        self._cw.set_content_type(contenttype or self.content_type,
+
−                                  filename=entity.download_file_name(),
+
−                                  encoding=encoding)
+
−
+
−    def call(self):
+
−        self.w(self.cw_rset.complete_entity(0, 0).download_data())
+
−
+
−
+
−class DownloadLinkView(EntityView):
+
−    """view displaying a link to download the file"""
+
−    __regid__ = 'downloadlink'
+
−    __select__ = implements(IDownloadable)
+
−    title = None # should not be listed in possible views
+
−
+
−
+
−    def cell_call(self, row, col, title=None, **kwargs):
+
−        entity = self.cw_rset.get_entity(row, col)
+
−        url = xml_escape(entity.download_url())
+
−        self.w(u'<a href="%s">%s</a>' % (url, xml_escape(title or entity.dc_title())))
+
−
+
−
+
−class IDownloadablePrimaryView(primary.PrimaryView):
+
−    __select__ = implements(IDownloadable)
+
−
+
−    def render_entity_attributes(self, entity):
+
−        super(IDownloadablePrimaryView, self).render_entity_attributes(entity)
+
−        self.w(u'<div class="content">')
+
−        contenttype = entity.download_content_type()
+
−        if contenttype.startswith('image/'):
+
−            self.wview('image', entity.cw_rset, row=entity.cw_row)
+
−        else:
+
−            self.wview('downloadlink', entity.cw_rset, title=self._cw._('download'), row=entity.cw_row)
+
−            try:
+
−                if ENGINE.has_input(contenttype):
+
−                    self.w(entity.printable_value('data'))
+
−            except TransformError:
+
−                pass
+
−            except Exception, ex:
+
−                msg = self._cw._("can't display data, unexpected error: %s") \
+
−                      % xml_escape(str(ex))
+
−                self.w('<div class="error">%s</div>' % msg)
+
−        self.w(u'</div>')
+
−
+
−
+
−class IDownloadableLineView(baseviews.OneLineView):
+
−    __select__ = implements(IDownloadable)
+
−
+
−    def cell_call(self, row, col, title=None, **kwargs):
+
−        """the oneline view is a link to download the file"""
+
−        entity = self.cw_rset.get_entity(row, col)
+
−        url = xml_escape(entity.absolute_url())
+
−        name = xml_escape(title or entity.download_file_name())
+
−        durl = xml_escape(entity.download_url())
+
−        self.w(u'<a href="%s">%s</a> [<a href="%s">%s</a>]' %
+
−               (url, name, durl, self._cw._('download')))
+
−
+
−
+
−class ImageView(EntityView):
+
−    __regid__ = 'image'
+
−    __select__ = implements(IDownloadable) & score_entity(is_image)
+
−
+
−    title = _('image')
+
−
+
−    def call(self):
+
−        rset = self.cw_rset
+
−        for i in xrange(len(rset)):
+
−            self.w(u'<div class="efile">')
+
−            self.wview(self.__regid__, rset, row=i, col=0)
+
−            self.w(u'</div>')
+
−
+
−    def cell_call(self, row, col, width=None, height=None, link=False):
+
−        entity = self.cw_rset.get_entity(row, col)
+
−        #if entity.data_format.startswith('image/'):
+
−        imgtag = u'<img src="%s" alt="%s" ' % (
+
−            xml_escape(entity.download_url()),
+
−            (self._cw._('download %s')  % xml_escape(entity.download_file_name())))
+
−        if width:
+
−            imgtag += u'width="%i" ' % width
+
−        if height:
+
−            imgtag += u'height="%i" ' % height
+
−        imgtag += u'/>'
+
−        if link:
+
−            self.w(u'<a href="%s">%s</a>' % (entity.absolute_url(vid='download'),
+
−                                             imgtag))
+
−        else:
+
−            self.w(imgtag)
+
−
+
−