OOoTemplate.py 24.1 KB
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##############################################################################
#
# Copyright (c) 2005 Nexedi SARL and Contributors. All Rights Reserved.
#                    Jean-Paul Smets-Solanes <jp@nexedi.com>
#
# WARNING: This program as such is intended to be used by professional
# programmers who take the whole responsability of assessing all potential
# consequences resulting from its eventual inadequacies and bugs
# End users who are looking for a ready-to-use solution with commercial
# garantees and support are strongly adviced to contract a Free Software
# Service Company
#
# This program is Free Software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
#
##############################################################################

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from types import StringType
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from zLOG import LOG
from zLOG import PROBLEM
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from OFS.Image import File
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from Products.CMFCore.FSPageTemplate import FSPageTemplate
from Products.CMFCore.DirectoryView import registerFileExtension, registerMetaType
from Products.PageTemplates.ZopePageTemplate import ZopePageTemplate
from Products.PageTemplates.PageTemplateFile import PageTemplateFile
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from TAL.TALInterpreter import FasterStringIO
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from Products.ERP5Type import PropertySheet
from urllib import quote
from Globals import InitializeClass, DTMLFile, get_request
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from Globals import DevelopmentMode
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from Acquisition import aq_base
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from AccessControl import ClassSecurityInfo
from OOoUtils import OOoBuilder
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from zipfile import ZipFile, ZIP_DEFLATED
try:
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  from cStringIO import StringIO
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except ImportError:
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  from StringIO import StringIO
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import re
import itertools
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try:
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  from webdav.Lockable import ResourceLockedError
  from webdav.WriteLockInterface import WriteLockInterface
  SUPPORTS_WEBDAV_LOCKS = 1
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except ImportError:
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  SUPPORTS_WEBDAV_LOCKS = 0
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from Products.ERP5.Document.Document import ConversionError
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import Products.ERP5Type.Document
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# Constructors
manage_addOOoTemplate = DTMLFile("dtml/OOoTemplate_add", globals())

def addOOoTemplate(self, id, title="", REQUEST=None):
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  """Add OOo template to folder.

  id     -- the id of the new OOo template to add
  title  -- the title of the OOo to add
  Result -- empty string
  """
  # add actual object
  id = self._setObject(id, OOoTemplate(id, title))
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  if REQUEST is not None:
    file = REQUEST.form.get('file')
    if file.filename:
      # Get the template in the associated context and upload the file
      getattr(self,id).pt_upload(REQUEST, file)
      # respond to the add_and_edit button if necessary
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  add_and_edit(self, id, REQUEST)
  return ''
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def add_and_edit(self, id, REQUEST):
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  """Helper method to point to the object's management screen if
  'Add and Edit' button is pressed.
  id -- id of the object we just added
  """
  if REQUEST is None:
    return
  try:
    u = self.DestinationURL()
  except AttributeError:
    u = REQUEST['URL1']
  if REQUEST['submit'] == " Add and Edit ":
    u = "%s/%s" % (u, quote(id))
  REQUEST.RESPONSE.redirect(u+'/manage_main')
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class OOoTemplateStringIO(FasterStringIO):
  def write(self, s):
    if type(s) == unicode:
      s = s.encode('utf-8')
    FasterStringIO.write(self, s)

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class OOoTemplate(ZopePageTemplate):
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  """
  A page template which is able to embed and OpenOffice
  file (zip archive) and replace content.xml at render time
  with XML dynamically generated through TAL/TALES/METAL expressions

  TODO:
    - find a way to embed TALES in OOo documents in such
      way that editing with OOo does not destroy TAL/TALES

    - add preprocessing option to handle explicit macros in
      OOo in any language. Include debugging options in this case
      (on preprocessed source rather than pure source)
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    - add interface for Cache (http/RAM)
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  """
  meta_type = "ERP5 OOo Template"
  icon = "www/OOo.png"

  # NOTE: 100 is just pure random starting number
  # it won't influence the code at all
  document_counter = itertools.count(100)
  # Every linked OLE document is in a directory starting with 'Obj'
  _OLE_directory_prefix  = 'Obj'
  # every OOo document have a content-type starting like this
  _OOo_content_type_root = 'application/vnd.sun.xml.'
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  _ODF_content_type_root = 'application/vnd.oasis.opendocument.'
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  # Declarative Security
  security = ClassSecurityInfo()

  # Declarative properties
  property_sheets = ( PropertySheet.Base
                    , PropertySheet.SimpleItem)

  # Constructors
  constructors =   (manage_addOOoTemplate, addOOoTemplate)

  # Default Attributes
  ooo_stylesheet = 'Base_getODTStyleSheet'

  # Default content type
  #content_type = 'application/vnd.sun.xml.writer' # Writer type by default
  content_type = 'text/html' # This is the only for now to produce valid XML

  # Management interface
  manage_options =  ( ZopePageTemplate.manage_options +
      (
        {'label':'Stylesheet Setting', 'action':'formSettings',
        'help':('ERPForm', 'pdfStylesheet.txt')},
      )
    )

  security.declareProtected('View management screens', 'formSettings')
  formSettings = PageTemplateFile('www/formSettings', globals(),
                                  __name__='formSettings')
  formSettings._owner = None

  def __init__(self,*args,**kw):
    ZopePageTemplate.__init__(self,*args,**kw)
    # we store the attachments of the uploaded document
    self.OLE_documents_zipstring = None

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  # Every OOoTemplate uses UTF-8 or Unicode, so a special StringIO class
  # must be used, which does not care about response.
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  def StringIO(self):
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    return OOoTemplateStringIO()
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  def pt_upload(self, REQUEST, file=''):
    """Replace the document with the text in file."""
    if SUPPORTS_WEBDAV_LOCKS and self.wl_isLocked():
      raise ResourceLockedError, "File is locked via WebDAV"

    if type(file) is not StringType:
      if not file: raise ValueError, 'File not specified'
      file = file.read()

    if file.startswith("PK") : # FIXME: this condition is probably not enough
      # this is a OOo zip file, extract the content
      builder = OOoBuilder(file)
      attached_files_list = [n for n in builder.getNameList()
        if n.startswith(self._OLE_directory_prefix)
        or n.startswith('Pictures')
        or n == 'META-INF/manifest.xml' ]
      # destroy a possibly pre-existing OLE document set
      if self.OLE_documents_zipstring:
        self.OLE_documents_zipstring = None
      # create a zip archive and store it
      if attached_files_list:
        memory_file = StringIO()
        try:
          zf = ZipFile(memory_file, mode='w', compression=ZIP_DEFLATED)
        except RuntimeError:
          zf = ZipFile(memory_file, mode='w')
        for attached_file in attached_files_list:
            zf.writestr(attached_file, builder.extract(attached_file) )
        zf.close()
        memory_file.seek(0)
        self.OLE_documents_zipstring = memory_file.read()
      self.content_type = builder.getMimeType()
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      #get XSL stylesheet from portal_skins
      xsl_dtml = getattr(self, 'ERP5OOoTemplate_ooo2zpt', None)
      xsl_content = None
      if xsl_dtml is not None:
        xsl_content = xsl_dtml()
      file = builder.prepareContentXml(xsl_content)
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    return ZopePageTemplate.pt_upload(self, REQUEST, file)

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  security.declareProtected('Change Page Templates', 'pt_edit')
  def pt_edit(self, text, content_type):
    if content_type:
      self.content_type = str(content_type)
    if hasattr(text, 'read'):
      text = text.read()
    self.write(text)

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  security.declareProtected('Change Page Templates', 'doSettings')
  def doSettings(self, REQUEST, title, ooo_stylesheet):
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    """
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      Change title and ooo_stylesheet.
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    """
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    if SUPPORTS_WEBDAV_LOCKS and self.wl_isLocked():
      raise ResourceLockedError, "File is locked via WebDAV"
    self.ooo_stylesheet = ooo_stylesheet
    self.pt_setTitle(title)
    #REQUEST.set('text', self.read()) # May not equal 'text'!
    message = "Saved changes."
    if getattr(self, '_v_warnings', None):
      message = ("<strong>Warning:</strong> <i>%s</i>"
                % '<br>'.join(self._v_warnings))
    return self.formSettings(manage_tabs_message=message)

  def _resolvePath(self, path):
    return self.getPortalObject().unrestrictedTraverse(path)

  def renderIncludes(self, here, text, sub_document=None):
    attached_files_dict = {}
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    arguments_re = re.compile('(\w+:?\w+)\s*=\s*"(.*?)"\s*',re.DOTALL)
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    def getLengthInfos( opts_dict, opts_names ):
      ret = []
      for opt_name in opts_names:
        try:
          val = opts_dict[opt_name]
          if val.endswith('cm'):
            val = val[:-2]
          val = float( val )
        except (ValueError, KeyError):
          val = None
        ret.append(val)
      return ret

    def replaceIncludes(match):
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      tag_string = match.group(1)
      # Build a dictionary with tag parameters
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      options_dict = dict(arguments_re.findall(tag_string))
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      # Find the page template based on the path and remove path from dict
      document = self._resolvePath(options_dict['path'].encode())
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      document_text = ZopePageTemplate.pt_render(document) # extra_context is missing
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      del options_dict['path']
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      # Find the type of the embedded document
      document_type = document.content_type
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      # Prepare a subdirectory to store embedded objects
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      actual_idx = self.document_counter.next()
      dir_name = '%s%d'%(self._OLE_directory_prefix,actual_idx)

      if sub_document: # sub-document means sub-directory
        dir_name = sub_document + '/' + dir_name
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      # Get the stylesheet of the embedded openoffice document
      ooo_stylesheet = document.ooo_stylesheet
      if ooo_stylesheet:
        ooo_stylesheet = getattr(here, ooo_stylesheet)
        # If ooo_stylesheet is dynamic, call it
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        try:
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          ooo_stylesheet = ooo_stylesheet()
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        except AttributeError:
          pass
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        temp_builder = OOoBuilder(ooo_stylesheet)
        stylesheet = temp_builder.extract('styles.xml')
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      else:
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        stylesheet = None
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      # Start recursion if necessary
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      sub_attached_files_dict = {}
      if 'office:include' in document_text: # small optimisation to avoid recursion if possible
        (document_text, sub_attached_files_dict ) = self.renderIncludes(document_text, dir_name)
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      # Build settings document if necessary
      settings_text = None
      if 0:
        w = 10
        h = 10
        # View*    = writer
        # Visible* = calc
        settings_text = """<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE office:document-settings PUBLIC "-//OpenOffice.org//DTD OfficeDocument 1.0//EN" "office.dtd">
<office:document-settings xmlns:office="http://openoffice.org/2000/office"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:config="http://openoffice.org/2001/config" office:version="1.0">
<office:settings>
<config:config-item-set config:name="view-settings">
<config:config-item config:name="ViewAreaTop" config:type="int">0</config:config-item>
<config:config-item config:name="ViewAreaLeft" config:type="int">0</config:config-item>
<config:config-item config:name="ViewAreaWidth" config:type="int">%(w)d</config:config-item>
<config:config-item config:name="ViewAreaHeight" config:type="int">%(h)d</config:config-item>
<config:config-item config:name="VisibleAreaTop" config:type="int">0</config:config-item>
<config:config-item config:name="VisibleAreaLeft" config:type="int">0</config:config-item>
<config:config-item config:name="VisibleAreaWidth" config:type="int">%(w)d</config:config-item>
<config:config-item config:name="VisibleAreaHeight" config:type="int">%(h)d</config:config-item>
</config:config-item-set>
</office:settings>
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</office:document-settings>""" % dict( w=int(w*1000) , h=int(h*1000) ) # convert from 10^-2 (centimeters) to 10^-5

      # Attach content, style and settings if any
      attached_files_dict[dir_name] = dict(document=document_text,
                                           doc_type=document_type,
                                           stylesheet=stylesheet)
      if settings_text:
        attached_files_dict[dir_name + '/settings.xml'] = dict(document=settings_text,
                                                               doc_type='text/xml')
      attached_files_dict.update(sub_attached_files_dict)

      # Build the new tag
      parameter_list = []
      for k, v in options_dict.items():
        parameter_list.append('%s="%s"' % (k, v))
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      new_tag = '<draw:object xlink:href="./%s" %s/>' %\
                 (dir_name.split('/')[-1], ' '.join(parameter_list))
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      return new_tag
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    def replaceIncludesImg(match):
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      options_dict = dict(x='0cm', y='0cm', style="fr1")
      options_dict.update(dict(arguments_re.findall(match.group(1))))
      picture = self._resolvePath(options_dict['path'].encode())
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      # "standard" filetype == Image or File , for ERP objects the
      # manipulations are different
      is_standard_filetype = True

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      # If this is not a File, build a new file with this content
      if not isinstance(picture, File):
        tmp_picture = Products.ERP5Type.Document.newTempImage(
                                    self, 'tmp')
        tmp_picture.setData(picture())
        picture = tmp_picture

      if getattr(aq_base(picture), 'data', None) is None \
                  or callable(aq_base(picture).content_type):
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        is_standard_filetype = False

      if is_standard_filetype:
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        picture_data = str(picture.getData())
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      else:
        picture_data = picture.Base_download()

      # fetch the content-type of the picture (generally guessed by zope)
      if 'type' not in options_dict:
        if is_standard_filetype:
          options_dict['type'] = picture.content_type
        else:
          options_dict['type'] = picture.content_type()

      if '/' not in options_dict['type']:
        options_dict['type'] = 'image/' + options_dict['type']

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      w, h, maxwidth, maxheight = getLengthInfos(options_dict, ('width', 'height', 'maxwidth', 'maxheight'))
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      aspect_ratio = 1
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      try: # try image properties
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        aspect_ratio = float(picture.width) / float(picture.height)
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      except (TypeError, ZeroDivisionError):
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        try: # try ERP5.Document.Image API
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          height = float(picture.getHeight())
          if height:
            aspect_ratio = float(picture.getWidth()) / height
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        except AttributeError: # fallback to Photo API
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          height = float(picture.height())
          if height:
            aspect_ratio = float(picture.width()) / height
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      # fix a default value and correct the aspect
      if h is None:
        if w is None:
          w = 10.0
        h = w / aspect_ratio
      elif w is None:
        w = h * aspect_ratio
      # picture is too large
      if maxwidth and maxwidth < w:
        w = maxwidth
        h = w / aspect_ratio
      if maxheight and maxheight < h:
        h = maxheight
        w = h * aspect_ratio

      actual_idx = self.document_counter.next()
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      pic_name = 'Pictures/picture%d.%s' % (actual_idx, options_dict['type'].split('/')[-1])
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      if sub_document: # sub-document means sub-directory
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        pic_name = sub_document + '/' + pic_name
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      attached_files_dict[pic_name] = dict(
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        document=picture_data,
        doc_type=options_dict['type']
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      )
      # XXX: Pictures directory not managed (seems facultative)
      #  <manifest:file-entry manifest:media-type="" manifest:full-path="ObjBFE4F50D/Pictures/"/>
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      is_legacy = ('oasis.opendocument' not in self.content_type)
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      if is_legacy:
        replacement = """<draw:image draw:style-name="%s" draw:name="ERP5Image%d"
  text:anchor-type="paragraph" svg:x="%s" svg:y="%s"
  svg:width="%.3fcm" svg:height="%.3fcm" xlink:href="#Pictures/%s"
  xlink:type="simple" xlink:show="embed" xlink:actuate="onLoad"/>
        """ % (options_dict['style'], actual_idx,
               options_dict['x'], options_dict['y'],
               w, h,
               pic_name.split('/')[-1] )
      else:
        replacement = """<draw:frame draw:style-name="%s" draw:name="ERP5Image%d"
  text:anchor-type="paragraph" svg:x="%s" svg:y="%s"
  svg:width="%.3fcm" svg:height="%.3fcm">
     <draw:image xlink:href="Pictures/%s" xlink:type="simple"
                 xlink:show="embed" xlink:actuate="onLoad"/>
  </draw:frame>
        """ % (options_dict['style'], actual_idx,
               options_dict['x'], options_dict['y'],
               w, h,
               pic_name.split('/')[-1] )

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      if not (self.content_type.endswith('draw') or
              self.content_type.endswith('presentation') or
              self.content_type.endswith('writer') or
              self.content_type.endswith('text')):
        replacement = '<text:p text:style-name="Standard">'+replacement+'</text:p>'
      return replacement

    # NOTE: (?s) at the end is for including '\n' when matching '.'
    # It's an equivalent to DOTALL option passing (but sub can't get options parameter)
    text = re.sub('<\s*office:include_img\s+(.*?)\s*/\s*>(?s)', replaceIncludesImg, text)
    text = re.sub('<\s*office:include\s+(.*?)\s*/\s*>(?s)', replaceIncludes, text)

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    return (text, attached_files_dict)
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  # Proxy method to PageTemplate
  def pt_render(self, source=0, extra_context={}):
    # Get request
    request = extra_context.get('REQUEST', None)
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    if request is None:
      request = self.REQUEST
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    # Get parent object (the one to render this template on)
    here = getattr(self, 'aq_parent', None)
    if here is None:
      # This is a system error
      raise ValueError, 'Can not render a template without a parent acquisition context'
    # Retrieve master document
    ooo_document = getattr(here, self.ooo_stylesheet)
    # If style is dynamic, call it
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    try:
      ooo_document = ooo_document()
    except AttributeError:
      pass
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    # Create a new builder instance
    ooo_builder = OOoBuilder(ooo_document)
    # Pass builder instance as extra_context
    extra_context['ooo_builder'] = ooo_builder
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    # And render page template
    doc_xml = ZopePageTemplate.pt_render(self, source=source, extra_context=extra_context)
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    if isinstance(doc_xml, unicode):
      doc_xml = doc_xml.encode('utf-8')
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    # Replace the includes
    (doc_xml,attachments_dict) = self.renderIncludes(here, doc_xml)
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    try:
      default_styles_text = ooo_builder.extract('styles.xml')
    except AttributeError:
      default_styles_text = None
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    # Add the associated files
    for dir_name, document_dict in attachments_dict.iteritems():
      # Special case : the document is an OOo one
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      if document_dict['doc_type'].startswith(self._OOo_content_type_root) or \
         document_dict['doc_type'].startswith(self._ODF_content_type_root):
        ooo_builder.addFileEntry(full_path=dir_name,
                                 media_type=document_dict['doc_type'])
        ooo_builder.addFileEntry(full_path=dir_name + '/content.xml',
                                 media_type='text/xml', content=document_dict['document'])
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        styles_text = default_styles_text
        if document_dict.has_key('stylesheet') and document_dict['stylesheet']:
          styles_text = document_dict['stylesheet']
        if styles_text:
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          ooo_builder.addFileEntry(full_path=dir_name + '/styles.xml',
                                   media_type='text/xml', content=styles_text)
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      else: # Generic case
        ooo_builder.addFileEntry(full_path=dir_name,
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                                 media_type=document_dict['doc_type'],
                                 content=document_dict['document'])
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    # Debug mode
    if request.get('debug',0):
      return doc_xml

    # Replace content.xml in master openoffice template
    ooo_builder.replace('content.xml', doc_xml)

    # Old templates correction
    try:
      self.OLE_documents_zipstring
    except AttributeError:
      self.OLE_documents_zipstring = None

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    # Convert if necessary
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    opts = extra_context.get("options", dict())
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    # Get batch_mode
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    batch_mode = opts.get('batch_mode', None)

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    # If the file has embedded OLE documents, restore it
    if self.OLE_documents_zipstring:
      additional_builder = OOoBuilder( self.OLE_documents_zipstring )
      for name in additional_builder.getNameList():
        ooo_builder.replace(name, additional_builder.extract(name) )

    # Update the META informations
    ooo_builder.updateManifest()

    # Produce final result
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    if batch_mode:
      ooo = ooo_builder.render()
    else:
      ooo = ooo_builder.render(name=self.title or self.id)
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    format = opts.get('format', request.get('format', None))
    if format:
      return self._asFormat(ooo, format, request, batch_mode)
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    if not format and not batch_mode:
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      request.RESPONSE.setHeader('Content-Type','%s; charset=utf-8' % self.content_type)
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      request.RESPONSE.setHeader('Content-disposition', 'inline;filename=%s' % self.title_or_id())
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    if DevelopmentMode:
      # Validate XML in development mode
      from Products.ERP5OOo.tests.utils import Validator
      err_list = Validator().validate(ooo)
      if err_list:
        LOG('ERP5OOo', PROBLEM,
            'Validation of %s failed:\n%s' % (self.getId(), ''.join(err_list)))
    
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    return ooo
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  def om_icons(self):
    """Return a list of icon URLs to be displayed by an ObjectManager"""
    icons = ({'path': 'misc_/ERP5OOo/OOo.png',
              'alt': self.meta_type, 'title': self.meta_type},)
    if not self._v_cooked:
        self._cook()
    if self._v_errors:
        icons = icons + ({'path': 'misc_/PageTemplates/exclamation.gif',
                          'alt': 'Error',
                          'title': 'This template has an error'},)
    return icons

  def _asPdf(self, ooo, REQUEST=None):
    """
    Return OOo report as pdf
    """
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    return self._asFormat(ooo, 'pdf', REQUEST)
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  def _asFormat(self, ooo, format, REQUEST=None, batch_mode=0):
    # Now create a temp OOoDocument to convert data to pdf
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    from Products.ERP5Type.Document import newTempOOoDocument
    tmp_ooo = newTempOOoDocument(self, self.title_or_id())
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    tmp_ooo.edit(base_data=ooo,
                 fname=self.title_or_id(),
                 source_reference=self.title_or_id(),
                 base_content_type=self.content_type,)
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    tmp_ooo.oo_data = ooo
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    if format == 'pdf' and not batch_mode:
      # Slightly different implementation
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      # now convert it to pdf
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      tgts = [x[1] for x in tmp_ooo.getTargetFormatItemList()
              if x[1].endswith('pdf')]
      if len(tgts) > 1:
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        REQUEST.RESPONSE.setHeader('Content-type', 'text/html')
        REQUEST.RESPONSE.setHeader('Content-disposition', 'inline;filename=%s.pdf' % self.title_or_id())
        raise ValueError, 'multiple pdf formats found - this shouldnt happen'
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      if len(tgts) == 0:
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        REQUEST.RESPONSE.setHeader('Content-type', 'text/html')
        REQUEST.RESPONSE.setHeader('Content-disposition', 'inline;filename=%s.pdf' % self.title_or_id())    
        raise ValueError, 'no pdf format found'
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      fmt = tgts[0]
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      mime, data = tmp_ooo.convert(fmt)
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      if REQUEST is not None:
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          REQUEST.RESPONSE.setHeader('Content-type', 'application/pdf')
          REQUEST.RESPONSE.setHeader('Content-disposition', 'attachment;filename=%s.pdf' % self.title_or_id())
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      return data
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    mime, data = tmp_ooo.convert(format)
    if REQUEST is not None and not batch_mode:
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      REQUEST.RESPONSE.setHeader('Content-type', mime)
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      REQUEST.RESPONSE.setHeader('Content-disposition', 'attachment;filename=%s.%s' % (self.title_or_id(),format))
        # FIXME the above lines should return zip format when html was requested
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    return data
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InitializeClass(OOoTemplate)

class FSOOoTemplate(FSPageTemplate, OOoTemplate):

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  meta_type = "ERP5 Filesystem OOo Template"
  icon = "www/OOo.png"
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  def __call__(self, *args, **kwargs):
    return OOoTemplate.__call__(self, *args, **kwargs)
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InitializeClass(FSOOoTemplate)

registerFileExtension('ooot', FSOOoTemplate)
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registerMetaType(OOoTemplate.meta_type, FSOOoTemplate)