bibformatadminlib.py
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bibformatadminlib.py
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	# -- coding: utf-8 --
	##
	## This file is part of Invenio.
	## Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 CERN.
	##
	## Invenio 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.
	##
	## Invenio 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 Invenio; if not, write to the Free Software Foundation, Inc.,
	## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.

	"""
	Handle requests from the web interface to configure BibFormat.
	"""

	__revision__ = "$Id$"

	import os
	import re
	import stat
	import time
	import cgi

	from invenio.config import CFG_SITE_LANG, CFG_SITE_URL, CFG_ETCDIR
	from invenio.bibformat_config import \
	CFG_BIBFORMAT_TEMPLATES_PATH, \
	CFG_BIBFORMAT_OUTPUTS_PATH, \
	CFG_BIBFORMAT_ELEMENTS_PATH, \
	CFG_BIBFORMAT_FORMAT_TEMPLATE_EXTENSION
	from invenio.urlutils import wash_url_argument
	from invenio.errorlib import get_msgs_for_code_list
	from invenio.messages import gettext_set_language, wash_language, language_list_long
	from invenio.search_engine import perform_request_search
	from invenio import bibformat_dblayer
	from invenio import bibformat_engine
	from invenio.textutils import encode_for_xml

	import invenio.template
	bibformat_templates = invenio.template.load('bibformat')

	def getnavtrail(previous = '', ln=CFG_SITE_LANG):
	"""Get the navtrail"""
	previous = wash_url_argument(previous, 'str')
	ln = wash_language(ln)
	_ = gettext_set_language(ln)
	navtrail = '''<a class="navtrail" href="%s/help/admin">%s</a> > <a class="navtrail" href="%s/admin/bibformat/bibformatadmin.py?ln=%s">%s</a> ''' % \
	(CFG_SITE_URL, _("Admin Area"), CFG_SITE_URL, ln, _("BibFormat Admin"))
	navtrail = navtrail + previous
	return navtrail

	def perform_request_index(ln=CFG_SITE_LANG, warnings=None, is_admin=False):
	"""
	Returns the main BibFormat admin page.

	@param ln: language
	@param warnings: a list of messages to display at top of the page, that prevents writability in etc
	@param is_admin: indicate if user is authorized to use BibFormat
	@return: the main admin page
	"""
	if warnings is not None and len(warnings) > 0:
	warnings = get_msgs_for_code_list(warnings, 'warning', ln)
	warnings = [x[1] for x in warnings] # Get only message, not code

	return bibformat_templates.tmpl_admin_index(ln, warnings, is_admin)

	def perform_request_format_templates_management(ln=CFG_SITE_LANG, checking=0):
	"""
	Returns the main management console for format templates

	@param ln: language
	@param checking: the level of checking (0: basic, 1:extensive (time consuming) )
	@return: the main page for format templates management
	"""


	# Reload in case a format was changed
	bibformat_engine.clear_caches()

	# Get formats lists of attributes
	formats = bibformat_engine.get_format_templates(with_attributes=True)
	formats_attrs = []
	for filename in formats:
	attrs = formats[filename]['attrs']
	attrs['filename'] = filename
	if filename.endswith('.xsl'):
	attrs['name'] += ' (XSL)'
	attrs['editable'] = can_write_format_template(filename)
	path = CFG_BIBFORMAT_TEMPLATES_PATH + os.sep + filename
	try:
	attrs['last_mod_date'] = time.ctime(os.stat(path)[stat.ST_MTIME])
	except OSError:
	# File does not exist. Happens with temporary files
	# created by editors.
	continue

	status = check_format_template(filename, checking)
	if len(status) > 1 or (len(status)==1 and status[0][0] != 'ERR_BIBFORMAT_CANNOT_READ_TEMPLATE_FILE'):
	status = '''
	<a style="color: rgb(255, 0, 0);"
	href="%(siteurl)s/admin/bibformat/bibformatadmin.py/validate_format?ln=%(ln)s&bft=%(bft)s">Not OK</a>
	''' % {'siteurl':CFG_SITE_URL,
	'ln':ln,
	'bft':filename}
	else:
	status = '<span style="color: rgb(0, 255, 0);">OK</span>'
	attrs['status'] = status
	formats_attrs.append(attrs)

	def sort_by_attr(seq):
	"""
	Sort 'seq' by attribute name.
	@param seq: a list of dictionaries, containing each one key named 'name'
	"""
	intermed = [ (x['name'].lower(), i, x) for i, x in enumerate(seq)]
	intermed.sort()
	return [x[-1] for x in intermed]

	sorted_format_templates = sort_by_attr(formats_attrs)

	return bibformat_templates.tmpl_admin_format_templates_management(ln, sorted_format_templates)

	def perform_request_format_template_show(bft, ln=CFG_SITE_LANG, code=None,
	ln_for_preview=CFG_SITE_LANG, pattern_for_preview="",
	content_type_for_preview="text/html"):
	"""
	Returns the editor for format templates.

	@param ln: language
	@param bft: the template to edit
	@param code, the code being edited
	@param ln_for_preview: the language for the preview (for bfo)
	@param pattern_for_preview: the search pattern to be used for the preview (for bfo)
	@return: the main page for formats management
	"""
	format_template = bibformat_engine.get_format_template(filename=bft, with_attributes=True)

	# Either use code being edited, or the original code inside template
	if code is None:
	code = cgi.escape(format_template['code'])

	# Build a default pattern if it is empty
	if pattern_for_preview == "":
	recIDs = perform_request_search()
	if len(recIDs) > 0:
	recID = recIDs[0]
	pattern_for_preview = "recid:%s" % recID

	editable = can_write_format_template(bft)

	# Look for all existing content_types
	content_types = bibformat_dblayer.get_existing_content_types()

	# Add some standard content types if not already there
	standard_content_types = ['text/xml', 'application/rss+xml', 'text/plain', 'text/html']
	content_types.extend([content_type for content_type in standard_content_types
	if content_type not in content_types])

	return bibformat_templates.tmpl_admin_format_template_show(ln, format_template['attrs']['name'],
	format_template['attrs']['description'],
	code, bft,
	ln_for_preview=ln_for_preview,
	pattern_for_preview=pattern_for_preview,
	editable=editable,
	content_type_for_preview=content_type_for_preview,
	content_types=content_types)

	def perform_request_format_template_show_dependencies(bft, ln=CFG_SITE_LANG):
	"""
	Show the dependencies (on elements) of the given format.

	@param ln: language
	@param bft: the filename of the template to show
	"""
	format_template = bibformat_engine.get_format_template(filename=bft, with_attributes=True)
	name = format_template['attrs']['name']
	output_formats = get_outputs_that_use_template(bft)
	format_elements = get_elements_used_by_template(bft)
	tags = []
	for output_format in output_formats:
	for tag in output_format['tags']:
	tags.append(tag)
	for format_element in format_elements:
	for tag in format_element['tags']:
	tags.append(tag)

	tags.sort()
	return bibformat_templates.tmpl_admin_format_template_show_dependencies(ln,
	name,
	bft,
	output_formats,
	format_elements,
	tags)

	def perform_request_format_template_show_attributes(bft, ln=CFG_SITE_LANG, new=False):
	"""
	Page for template name and descrition attributes edition.

	If format template is new, offer the possibility to
	make a duplicate of an existing format template.

	@param ln: language
	@param bft: the template to edit
	@param new: if True, the template has just been added (is new)
	@return: the main page for format templates attributes edition
	"""
	all_templates = []
	if new:
	all_templates_attrs = bibformat_engine.get_format_templates(with_attributes=True)
	if all_templates_attrs.has_key(bft): # Sanity check. Should always be true at this stage
	del all_templates_attrs[bft] # Remove in order not to make a duplicate of self..

	# Sort according to name, inspired from Python Cookbook

	def sort_by_name(seq, keys):
	"""
	Sort the sequence 'seq' by 'keys'
	"""
	intermed = [(x['attrs']['name'], keys[i], i, x) for i, x in enumerate(seq)]
	intermed.sort()
	return [(x[1], x[0]) for x in intermed]

	all_templates = sort_by_name(all_templates_attrs.values(), all_templates_attrs.keys())
	#keys = all_templates_attrs.keys()
	#keys.sort()
	#all_templates = map(lambda x: (x, all_templates_attrs.get(x)['attrs']['name']), keys)

	format_template = bibformat_engine.get_format_template(filename=bft, with_attributes=True)
	name = format_template['attrs']['name']
	description = format_template['attrs']['description']
	editable = can_write_format_template(bft)

	return bibformat_templates.tmpl_admin_format_template_show_attributes(ln,
	name,
	description,
	bft,
	editable,
	all_templates,
	new)


	def perform_request_format_template_show_short_doc(ln=CFG_SITE_LANG, search_doc_pattern=""):
	"""
	Returns the format elements documentation to be included inside format templated editor.

	Keep only elements that have 'search_doc_pattern' text inside description,
	if pattern not empty

	@param ln: language
	@param search_doc_pattern: a search pattern that specified which elements to display
	@return: a brief version of the format element documentation
	"""
	# Get format elements lists of attributes
	elements = bibformat_engine.get_format_elements(with_built_in_params=True)

	keys = elements.keys()
	keys.sort()
	elements = map(elements.get, keys)

	def filter_elem(element):
	"""Keep element if is string representation contains all keywords of search_doc_pattern,
	and if its name does not start with a number (to remove 'garbage' from elements in tags table)"""
	if element['type'] != 'python' and \
	element['attrs']['name'][0] in ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']:
	return False
	text = str(element).upper() # Basic text representation
	if search_doc_pattern != "":
	for word in search_doc_pattern.split():
	if word.upper() != "AND" and text.find(word.upper()) == -1:
	return False

	return True

	elements = filter(filter_elem, elements)



	return bibformat_templates.tmpl_admin_format_template_show_short_doc(ln, elements)

	def perform_request_format_elements_documentation(ln=CFG_SITE_LANG):
	"""
	Returns the main management console for format elements.

	Includes list of format elements and associated administration tools.
	@param ln: language
	@return: the main page for format elements management
	"""
	# Get format elements lists of attributes
	elements = bibformat_engine.get_format_elements(with_built_in_params=True)

	keys = elements.keys()
	keys.sort()
	elements = map(elements.get, keys)
	# Remove all elements found in table and that begin with a number (to remove 'garbage')
	filtered_elements = [element for element in elements \
	if element is not None and \
	element['type'] == 'python' and \
	element['attrs']['name'][0] not in \
	['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']]

	return bibformat_templates.tmpl_admin_format_elements_documentation(ln, filtered_elements)

	def perform_request_format_element_show_dependencies(bfe, ln=CFG_SITE_LANG):
	"""
	Show the dependencies of the given format.

	@param ln: language
	@param bfe: the filename of the format element to show
	"""
	format_templates = get_templates_that_use_element(bfe)
	tags = get_tags_used_by_element(bfe)

	return bibformat_templates.tmpl_admin_format_element_show_dependencies(ln,
	bfe,
	format_templates,
	tags)

	def perform_request_format_element_test(bfe, ln=CFG_SITE_LANG, param_values=None, user_info=None):
	"""
	Show the dependencies of the given format.

	'param_values' is the list of values to pass to 'format'
	function of the element as parameters, in the order ...
	If params is None, this means that they have not be defined by user yet.

	@param ln: language
	@param bfe: the name of the format element to show
	@param params: the list of parameters to pass to element format function
	@param user_info: the user_info of this request
	"""
	_ = gettext_set_language(ln)
	format_element = bibformat_engine.get_format_element(bfe, with_built_in_params=True)

	# Load parameter names and description
	##
	param_names = []
	param_descriptions = []

	# First value is a search pattern to choose the record
	param_names.append(_("Test with record:")) # Caution: keep in sync with same text below
	param_descriptions.append(_("Enter a search query here."))

	# Parameters defined in this element
	for param in format_element['attrs']['params']:
	param_names.append(param['name'])
	param_descriptions.append(param['description'])

	# Parameters common to all elements of a kind
	for param in format_element['attrs']['builtin_params']:
	param_names.append(param['name'])
	param_descriptions.append(param['description'])

	# Load parameters values
	##

	if param_values is None: #First time the page is loaded
	param_values = []

	# Propose an existing record id by default
	recIDs = perform_request_search()
	if len(recIDs) > 0:
	recID = recIDs[0]
	param_values.append("recid:%s" % recID)

	# Default values defined in this element
	for param in format_element['attrs']['params']:
	param_values.append(param['default'])

	#Parameters common to all elements of a kind
	for param in format_element['attrs']['builtin_params']:
	param_values.append(param['default'])


	# Execute element with parameters
	##
	params = dict(zip(param_names, param_values))

	# Find a record corresponding to search pattern
	search_pattern = params[_("Test with record:")] # Caution keep in sync with same text above and below
	recIDs = perform_request_search(p=search_pattern)
	del params[_("Test with record:")] # Caution keep in sync with same text above

	if len(recIDs) > 0:
	bfo = bibformat_engine.BibFormatObject(recID = recIDs[0],
	ln = ln,
	search_pattern = search_pattern.split(' '),
	xml_record = None,
	user_info = user_info)
	(result, errors) = bibformat_engine.eval_format_element(format_element, bfo, params)
	else:
	result = get_msgs_for_code_list([("ERR_BIBFORMAT_NO_RECORD_FOUND_FOR_PATTERN", search_pattern)],
	stream='error', ln=CFG_SITE_LANG)[0][1]

	return bibformat_templates.tmpl_admin_format_element_test(ln,
	bfe,
	format_element['attrs']['description'],
	param_names,
	param_values,
	param_descriptions,
	result)

	def perform_request_output_formats_management(ln=CFG_SITE_LANG, sortby="code"):
	"""
	Returns the main management console for output formats.

	Includes list of output formats and associated administration tools.
	@param ln: language
	@param sortby: the sorting crieteria (can be 'code' or 'name')
	@return: the main page for output formats management
	"""
	# Reload in case a format was changed
	bibformat_engine.clear_caches()

	# Get output formats lists of attributes
	output_formats_list = bibformat_engine.get_output_formats(with_attributes=True)
	output_formats = {}
	for filename in output_formats_list:
	output_format = output_formats_list[filename]
	code = output_format['attrs']['code']
	path = CFG_BIBFORMAT_OUTPUTS_PATH + os.sep + filename
	output_format['editable'] = can_write_output_format(code)
	try:
	output_format['last_mod_date'] = time.ctime(os.stat(path)[stat.ST_MTIME])
	except OSError:
	# File does not exist. Happens with temporary files
	# created by editors.
	continue
	# Validate the output format
	status = check_output_format(code)
	# If there is an error but the error is just 'format is not writable', do not display as error
	if len(status) > 1 or (len(status)==1 and status[0][0] != 'ERR_BIBFORMAT_CANNOT_WRITE_OUTPUT_FILE'):
	status = '''
	<a style="color: rgb(255, 0, 0);"
	href="%(siteurl)s/admin/bibformat/bibformatadmin.py/validate_format?ln=%(ln)s&bfo=%(bfo)s">Not OK</a>
	''' % {'siteurl':CFG_SITE_URL,
	'ln':ln,
	'bfo':code}
	else:
	status = '<span style="color: rgb(0, 255, 0);">OK</span>'
	output_format['status'] = status
	output_formats[filename] = output_format

	# Sort according to code or name, inspired from Python Cookbook
	def get_attr(dic, attr):
	"""
	Returns the value given by 'attr' in the dictionary 'dic', representing
	an output format attributes.
	If attr is equal to 'code', returns the code attribute of the dictionary.
	Else returns the generic name

	@param dic: a dictionary of the attribute of an output format, as returned by bibformat_engine.get_output_format
	@param the: attribute we want to fetch. Either 'code' or any other string
	"""
	if attr == "code":
	return dic['attrs']['code']
	else:
	return dic['attrs']['names']['generic']

	def sort_by_attr(seq, attr):
	"""
	Sort dictionaries given in 'seq' according to parameter 'attr'
	"""
	intermed = [ (get_attr(x, attr), i, x) for i, x in enumerate(seq)]
	intermed.sort()
	return [x[-1] for x in intermed]

	if sortby != "code" and sortby != "name":
	sortby = "code"

	sorted_output_formats = sort_by_attr(output_formats.values(), sortby)

	return bibformat_templates.tmpl_admin_output_formats_management(ln, sorted_output_formats)

	def perform_request_output_format_show(bfo, ln=CFG_SITE_LANG, r_fld=[], r_val=[], r_tpl=[], default="", r_upd="", args={}):
	"""
	Returns the editing tools for a given output format.

	The page either shows the output format from file, or from user's
	POST session, as we want to let him edit the rules without
	saving. Policy is: r_fld, r_val, rules_tpl are list of attributes
	of the rules. If they are empty, load from file. Else use
	POST. The i th value of each list is one of the attributes of rule
	i. Rule i is the i th rule in order of evaluation. All list have
	the same number of item.

	r_upd contains an action that has to be performed on rules. It
	can composed of a number (i, the rule we want to modify) and an
	operator : "save" to save the rules, "add" or "del".
	syntax: operator [number]
	For eg: r_upd = _("Save Changes") saves all rules (no int should be specified).
	For eg: r_upd = _("Add New Rule") adds a rule (no int should be specified).
	For eg: r_upd = _("Remove Rule") + " 5" deletes rule at position 5.
	The number is used only for operation delete.

	An action can also be in **args. We must look there for string starting
	with '(+\|-) [number]' to increase (+) or decrease (-) a rule given by its
	index (number).
	For example "+ 5" increase priority of rule 5 (put it at fourth position).
	The string in **args can be followed by some garbage that looks like .x
	or .y, as this is returned as the coordinate of the click on the
	<input type="image">. We HAVE to use args and reason on its keys, because for <input> of
	type image, iexplorer does not return the value of the tag, but only the name.

	Action is executed only if we are working from user's POST session
	(means we must have loaded the output format first, which is
	totally normal and expected behaviour)

	IMPORTANT: we display rules evaluation index starting at 1 in
	interface, but we start internally at 0

	@param ln: language
	@param bfo: the filename of the output format to show
	@param r_fld: the list of 'field' attribute for each rule
	@param r_val: the list of 'value' attribute for each rule
	@param r_tpl: the list of 'template' attribute for each rule
	@param default: the default format template used by this output format
	@param r_upd: the rule that we want to increase/decrease in order of evaluation
	"""

	output_format = bibformat_engine.get_output_format(bfo, with_attributes=True)
	format_templates = bibformat_engine.get_format_templates(with_attributes=True)
	name = output_format['attrs']['names']['generic']
	rules = []
	debug = ""
	if len(r_fld) == 0 and r_upd=="":
	# Retrieve rules from file
	rules = output_format['rules']
	default = output_format['default']
	else:
	# Retrieve rules from given lists

	# Transform a single rule (not considered as a list with length
	# 1 by the templating system) into a list
	if not isinstance(r_fld, list):
	r_fld = [r_fld]
	r_val = [r_val]
	r_tpl = [r_tpl]

	for i in range(len(r_fld)):
	rule = {'field': r_fld[i],
	'value': r_val[i],
	'template': r_tpl[i]}
	rules.append(rule)
	# Execute action
	_ = gettext_set_language(ln)
	if r_upd.startswith(_("Remove Rule")):
	# Remove rule
	index = int(r_upd.split(" ")[-1]) -1
	del rules[index]
	elif r_upd.startswith(_("Save Changes")):
	# Save
	update_output_format_rules(bfo, rules, default)
	elif r_upd.startswith(_("Add New Rule")):
	# Add new rule
	rule = {'field': "",
	'value': "",
	'template': ""}
	rules.append(rule)
	else:
	# Get the action in 'args'
	# The action must be constructed from string of the kind:
	# + 5 or - 4 or + 5.x or -4.y
	for button_val in args.keys():#for all elements of form not handled yet
	action = button_val.split(" ")
	if action[0] == '-' or action[0] == '+':
	index = int(action[1].split(".")[0]) -1
	if action[0] == '-':
	# Decrease priority
	rule = rules[index]
	del rules[index]
	rules.insert(index + 1, rule)
	# debug = 'Decrease rule '+ str(index)
	break
	elif action[0] == '+':
	# Increase priority
	rule = rules[index]
	del rules[index]
	rules.insert(index - 1, rule)
	# debug = 'Increase rule ' + str(index)
	break


	editable = can_write_output_format(bfo)

	return bibformat_templates.tmpl_admin_output_format_show(ln,
	bfo,
	name,
	rules,
	default,
	format_templates,
	editable)

	def perform_request_output_format_show_dependencies(bfo, ln=CFG_SITE_LANG):
	"""
	Show the dependencies of the given format.

	@param ln: language
	@param bfo: the filename of the output format to show
	"""
	output_format = bibformat_engine.get_output_format(code=bfo, with_attributes=True)
	name = output_format['attrs']['names']['generic']
	format_templates = get_templates_used_by_output(bfo)

	return bibformat_templates.tmpl_admin_output_format_show_dependencies(ln,
	name,
	bfo,
	format_templates)

	def perform_request_output_format_show_attributes(bfo, ln=CFG_SITE_LANG):
	"""
	Page for output format names and description attributes edition.

	@param ln: language
	@param bfo: filename of output format to edit
	@return: the main page for output format attributes edition
	"""
	output_format = bibformat_engine.get_output_format(code=bfo, with_attributes=True)

	name = output_format['attrs']['names']['generic']
	description = output_format['attrs']['description']
	content_type = output_format['attrs']['content_type']
	visible = output_format['attrs']['visibility']
	# Get translated names. Limit to long names now.
	# Translation are given in order of languages in language_list_long()
	names_trans = []
	for lang in language_list_long():
	name_trans = output_format['attrs']['names']['ln'].get(lang[0], "")
	names_trans.append({'lang':lang[1], 'trans':name_trans})

	editable = can_write_output_format(bfo)

	return bibformat_templates.tmpl_admin_output_format_show_attributes(ln,
	name,
	description,
	content_type,
	bfo,
	names_trans,
	editable,
	visible)

	def add_format_template():
	"""
	Adds a new format template (mainly create file with unique name)

	@return: the filename of the created format
	"""
	(filename, name) = bibformat_engine.get_fresh_format_template_filename("Untitled")

	out = ""
	if not filename.endswith(".xsl"):
	out = '<name>%(name)s</name><description></description>' % {'name': name}
	path = CFG_BIBFORMAT_TEMPLATES_PATH + os.sep + filename
	format = open(path, 'w')
	format.write(out)
	format.close

	return filename

	def delete_format_template(filename):
	"""
	Delete a format template given by its filename

	If format template is not writable, do not remove

	@param filename: the format template filename
	"""
	if not can_write_format_template(filename):
	return

	path = CFG_BIBFORMAT_TEMPLATES_PATH + os.sep + filename
	os.remove(path)
	bibformat_engine.clear_caches()

	def update_format_template_code(filename, code=""):
	"""
	Saves code inside template given by filename
	"""
	format_template = bibformat_engine.get_format_template_attrs(filename)
	name = format_template['name']
	description = format_template['description']
	code = re.sub("\r\n", "\n", code)
	out = ""
	if not filename.endswith(".xsl"):
	out = """<name>%(name)s</name>
	<description>%(description)s</description>
	""" % {'name': name, 'description': description}
	out += code
	path = CFG_BIBFORMAT_TEMPLATES_PATH + os.sep + filename
	format = open(path, 'w')
	format.write(out)
	format.close

	bibformat_engine.clear_caches()

	def update_format_template_attributes(filename, name="", description="", duplicate=None):
	"""
	Saves name and description inside template given by filename.

	the filename must change according to name, and every output format
	having reference to filename must be updated.

	If name already exist, use fresh filename (we never overwrite other templates) amd
	remove old one.

	if duplicate is different from None and is not empty string, then it means that we must copy
	the code of the template whoose filename is given in 'duplicate' for the code
	of our template.

	@param duplicate: the filename of a template that we want to copy
	@return: the filename of the modified format
	"""
	if filename.endswith('.'+CFG_BIBFORMAT_FORMAT_TEMPLATE_EXTENSION):
	format_template = bibformat_engine.get_format_template(filename, with_attributes=True)
	if duplicate is not None and duplicate != "":
	format_template_to_copy = bibformat_engine.get_format_template(duplicate)
	code = format_template_to_copy['code']
	else:
	code = format_template['code']
	if format_template['attrs']['name'] != name:
	# Name has changed, so update filename
	old_filename = filename
	old_path = CFG_BIBFORMAT_TEMPLATES_PATH + os.sep + old_filename
	# Remove old one
	os.remove(old_path)

	(filename, name) = bibformat_engine.get_fresh_format_template_filename(name)

	# Change output formats that calls this template
	output_formats = bibformat_engine.get_output_formats()

	for output_format_filename in output_formats:
	if can_read_output_format(output_format_filename) and can_write_output_format(output_format_filename):
	output_path = CFG_BIBFORMAT_OUTPUTS_PATH + os.sep + output_format_filename
	format = open(output_path, 'r')
	output_text = format.read()
	format.close
	output_pattern = re.compile("---(\s)*" + old_filename, re.IGNORECASE)
	mod_output_text = output_pattern.sub("--- " + filename, output_text)
	if output_text != mod_output_text:
	format = open(output_path, 'w')
	format.write(mod_output_text)
	format.close

	description = cgi.escape(description)
	name = cgi.escape(name)
	# Write updated format template
	out = ""
	if not filename.endswith(".xsl"):
	out = """<name>%(name)s</name><description>%(description)s</description>""" % {'name': name,
	'description': description,}
	out += code

	path = CFG_BIBFORMAT_TEMPLATES_PATH + os.sep + filename
	format = open(path, 'w')
	format.write(out)
	format.close

	bibformat_engine.clear_caches()

	return filename

	def add_output_format():
	"""
	Adds a new output format (mainly create file with unique name)

	@return: the code of the created format, or None if it could not be created
	"""

	if not os.access(CFG_BIBFORMAT_OUTPUTS_PATH, os.W_OK):
	return None

	(filename, code) = bibformat_engine.get_fresh_output_format_filename("UNTLD")

	# Add entry in database
	bibformat_dblayer.add_output_format(code)
	bibformat_dblayer.set_output_format_name(code, "Untitled", lang="generic")
	bibformat_dblayer.set_output_format_content_type(code, "text/html")

	# Add file
	out = ""
	path = CFG_BIBFORMAT_OUTPUTS_PATH + os.sep + filename
	format = open(path, 'w')
	format.write(out)
	format.close

	return code

	def delete_output_format(code):
	"""
	Delete a format template given by its code

	if file is not writable, don't remove

	@param code: the 6 letters code of the output format to remove
	"""
	if not can_write_output_format(code):
	return

	# Remove entry from database
	bibformat_dblayer.remove_output_format(code)

	# Remove file
	filename = bibformat_engine.resolve_output_format_filename(code)
	path = CFG_BIBFORMAT_OUTPUTS_PATH + os.sep + filename
	os.remove(path)

	bibformat_engine.clear_caches()


	def update_output_format_rules(code, rules=[], default=""):
	"""
	Saves rules inside output format given by code
	"""

	# Generate output format syntax
	# Try to group rules by field
	previous_field = ""
	out = ""
	for rule in rules:
	field = rule["field"]
	value = rule["value"]
	template = rule["template"]
	if previous_field != field:
	out += "tag %s:\n" % field

	out +="%(value)s --- %(template)s\n" % {'value':value, 'template':template}
	previous_field = field

	out += "default: %s" % default
	filename = bibformat_engine.resolve_output_format_filename(code)
	path = CFG_BIBFORMAT_OUTPUTS_PATH + os.sep + filename
	format = open(path, 'w')
	format.write(out)
	format.close

	bibformat_engine.clear_caches()

	def update_output_format_attributes(code, name="", description="", new_code="",
	content_type="", names_trans=[], visibility=1):
	"""
	Saves name and description inside output format given by filename.

	If new_code already exist, use fresh code (we never overwrite other output).

	@param description: the new description
	@param name: the new name
	@param code: the new short code (== new bfo) of the output format
	@param code: the code of the output format to update
	@param names_trans: the translations in the same order as the languages from get_languages()
	@param content_type: the new content_type of the output format
	@param visibility: the visibility of the output format in the output formats list (public pages)
	@return: the filename of the modified format
	"""

	bibformat_dblayer.set_output_format_description(code, description)
	bibformat_dblayer.set_output_format_content_type(code, content_type)
	bibformat_dblayer.set_output_format_visibility(code, visibility)
	bibformat_dblayer.set_output_format_name(code, name, lang="generic")
	i = 0
	for lang in language_list_long():
	if names_trans[i] != "":
	bibformat_dblayer.set_output_format_name(code, names_trans[i], lang[0])
	i += 1

	new_code = new_code.upper()
	if code != new_code:
	# If code has changed, we must update filename with a new unique code
	old_filename = bibformat_engine.resolve_output_format_filename(code)
	old_path = CFG_BIBFORMAT_OUTPUTS_PATH + os.sep + old_filename
	(new_filename, new_code) = bibformat_engine.get_fresh_output_format_filename(new_code)
	new_path = CFG_BIBFORMAT_OUTPUTS_PATH + os.sep + new_filename
	os.rename(old_path, new_path)
	bibformat_dblayer.change_output_format_code(code, new_code)

	bibformat_engine.clear_caches()

	return new_code

	def can_read_format_template(filename):
	"""
	Returns 0 if we have read permission on given format template, else
	returns other integer
	"""
	path = "%s%s%s" % (CFG_BIBFORMAT_TEMPLATES_PATH, os.sep, filename)
	return os.access(path, os.R_OK)

	def can_read_output_format(bfo):
	"""
	Returns 0 if we have read permission on given output format, else
	returns other integer
	"""
	filename = bibformat_engine.resolve_output_format_filename(bfo)
	path = "%s%s%s" % (CFG_BIBFORMAT_OUTPUTS_PATH, os.sep, filename)
	return os.access(path, os.R_OK)

	def can_read_format_element(name):
	"""
	Returns 0 if we have read permission on given format element, else
	returns other integer
	"""

	filename = bibformat_engine.resolve_format_element_filename(name)
	path = "%s%s%s" % (CFG_BIBFORMAT_ELEMENTS_PATH, os.sep, filename)
	return os.access(path, os.R_OK)

	def can_write_format_template(bft):
	"""
	Returns 0 if we have write permission on given format template, else
	returns other integer
	"""
	if not can_read_format_template(bft):
	return False

	path = "%s%s%s" % (CFG_BIBFORMAT_TEMPLATES_PATH, os.sep, bft)
	return os.access(path, os.W_OK)

	def can_write_output_format(bfo):
	"""
	Returns 0 if we have write permission on given output format, else
	returns other integer
	"""
	if not can_read_output_format(bfo):
	return False

	filename = bibformat_engine.resolve_output_format_filename(bfo)
	path = "%s%s%s" % (CFG_BIBFORMAT_OUTPUTS_PATH, os.sep, filename)
	return os.access(path, os.W_OK)

	def can_write_etc_bibformat_dir():
	"""
	Returns true if we can write in etc/bibformat dir.
	"""
	path = "%s%sbibformat" % (CFG_ETCDIR, os.sep)
	return os.access(path, os.W_OK)

	def get_outputs_that_use_template(filename):
	"""
	Returns a list of output formats that call the given format template.
	The returned output formats also give their dependencies on tags.

	We don't return the complete output formats but some reference to
	them (filename + names)

	[ {'filename':"filename_1.bfo"
	'names': {'en':"a name", 'fr': "un nom", 'generic':"a name"}
	'tags': ['710__a', '920__']
	},
	...
	]

	Returns output formats references sorted by (generic) name

	@param filename: a format template filename
	"""
	output_formats_list = {}
	tags = []
	output_formats = bibformat_engine.get_output_formats(with_attributes=True)
	for output_format in output_formats:
	name = output_formats[output_format]['attrs']['names']['generic']
	# First look at default template, and add it if necessary
	if output_formats[output_format]['default'] == filename:
	output_formats_list[name] = {'filename':output_format,
	'names':output_formats[output_format]['attrs']['names'],
	'tags':[]}
	# Second look at each rule
	found = False
	for rule in output_formats[output_format]['rules']:
	if rule['template'] == filename:
	found = True
	tags.append(rule['field']) #Also build dependencies on tags

	# Finally add dependency on template from rule (overwrite default dependency,
	# which is weaker in term of tag)
	if found:
	output_formats_list[name] = {'filename':output_format,
	'names':output_formats[output_format]['attrs']['names'],
	'tags':tags}



	keys = output_formats_list.keys()
	keys.sort()
	return map(output_formats_list.get, keys)

	def get_elements_used_by_template(filename):
	"""
	Returns a list of format elements that are called by the given format template.
	The returned elements also give their dependencies on tags.

	Dependencies on tag might be approximative. See get_tags_used_by_element()
	doc string.

	We must handle usage of bfe_field in a special way if we want to retrieve
	used tag: used tag is given in "tag" parameter, not inside element code.

	The list is returned sorted by name

	[ {'filename':"filename_1.py"
	'name':"filename_1"
	'tags': ['710__a', '920__']
	},
	...
	]

	Returns elements sorted by name

	@param filename: a format template filename
	"""
	format_elements = {}
	format_template = bibformat_engine.get_format_template(filename=filename, with_attributes=True)
	code = format_template['code']
	format_elements_iter = bibformat_engine.pattern_tag.finditer(code)
	for result in format_elements_iter:
	function_name = result.group("function_name").lower()
	if function_name is not None and not format_elements.has_key(function_name) \
	and not function_name == "field":
	filename = bibformat_engine.resolve_format_element_filename("BFE_"+function_name)
	if filename is not None:
	tags = get_tags_used_by_element(filename)
	format_elements[function_name] = {'name':function_name.lower(),
	'filename':filename,
	'tags':tags}
	elif function_name == "field":
	# Handle bfe_field element in a special way
	if not format_elements.has_key(function_name):
	#Indicate usage of bfe_field if not already done
	filename = bibformat_engine.resolve_format_element_filename("BFE_"+function_name)
	format_elements[function_name] = {'name':function_name.lower(),
	'filename':filename,
	'tags':[]}
	# Retrieve value of parameter "tag"
	all_params = result.group('params')
	function_params_iterator = bibformat_engine.pattern_function_params.finditer(all_params)
	for param_match in function_params_iterator:
	name = param_match.group('param')
	if name == "tag":
	value = param_match.group('value')
	if not value in format_elements[function_name]['tags']:
	format_elements[function_name]['tags'].append(value)
	break

	keys = format_elements.keys()
	keys.sort()
	return map(format_elements.get, keys)


	# Format Elements Dependencies
	##

	def get_tags_used_by_element(filename):
	"""
	Returns a list of tags used by given format element

	APPROXIMATIVE RESULTS: the tag are retrieved in field(), fields()
	and control_field() function. If they are used computed, or saved
	in a variable somewhere else, they are not retrieved
	@TODO: There is room for improvements. For example catch
	call to BibRecord functions.

	Returns tags sorted by value

	@param filename: a format element filename
	"""
	tags = {}

	format_element = bibformat_engine.get_format_element(filename)
	if format_element is None:
	return []
	elif format_element['type']=="field":
	tags = format_element['attrs']['tags']
	return tags

	filename = bibformat_engine.resolve_format_element_filename(filename)
	path = CFG_BIBFORMAT_ELEMENTS_PATH + os.sep + filename
	format = open(path, 'r')
	code = format.read()
	format.close
	tags_pattern = re.compile('''
	(field\|fields\|control_field)\s* #Function call
	\(\s* #Opening parenthesis
	[\'"]+ #Single or double quote
	(?P<tag>.+?) #Tag
	[\'"]+\s* #Single or double quote
	(,[^\)]+)* #Additional function param
	\) #Closing parenthesis
	''', re.VERBOSE \| re.MULTILINE)

	tags_iter = tags_pattern.finditer(code)
	for result in tags_iter:
	tags[result.group("tag")] = result.group("tag")

	return tags.values()

	def get_templates_that_use_element(name):
	"""
	Returns a list of format templates that call the given format element.
	The returned format templates also give their dependencies on tags.

	[ {'filename':"filename_1.bft"
	'name': "a name"
	'tags': ['710__a', '920__']
	},
	...
	]

	Returns templates sorted by name

	@param name: a format element name
	"""
	format_templates = {}
	tags = []
	files = os.listdir(CFG_BIBFORMAT_TEMPLATES_PATH) #Retrieve all templates
	for possible_template in files:
	if possible_template.endswith(CFG_BIBFORMAT_FORMAT_TEMPLATE_EXTENSION):
	format_elements = get_elements_used_by_template(possible_template) #Look for elements used in template
	format_elements = map(lambda x: x['name'].lower(), format_elements)
	try: #Look for element
	format_elements.index(name.lower()) #If not found, get out of "try" statement

	format_template = bibformat_engine.get_format_template(filename=possible_template, with_attributes=True)
	template_name = format_template['attrs']['name']
	format_templates[template_name] = {'name':template_name,
	'filename':possible_template}
	except:
	pass

	keys = format_templates.keys()
	keys.sort()
	return map(format_templates.get, keys)

	# Output Formats Dependencies
	##

	def get_templates_used_by_output(code):
	"""
	Returns a list of templates used inside an output format give by its code
	The returned format templates also give their dependencies on elements and tags

	[ {'filename':"filename_1.bft"
	'name': "a name"
	'elements': [{'filename':"filename_1.py", 'name':"filename_1", 'tags': ['710__a', '920__']
	}, ...]
	},
	...
	]

	Returns templates sorted by name

	"""
	format_templates = {}
	output_format = bibformat_engine.get_output_format(code, with_attributes=True)

	filenames = map(lambda x: x['template'], output_format['rules'])
	if output_format['default'] != "":
	filenames.append(output_format['default'])

	for filename in filenames:
	template = bibformat_engine.get_format_template(filename, with_attributes=True)
	name = template['attrs']['name']
	elements = get_elements_used_by_template(filename)
	format_templates[name] = {'name':name,
	'filename':filename,
	'elements':elements}


	keys = format_templates.keys()
	keys.sort()
	return map(format_templates.get, keys)


	# Validation tools
	##

	def perform_request_format_validate(ln=CFG_SITE_LANG, bfo=None, bft=None, bfe=None):
	"""
	Returns a page showing the status of an output format or format
	template or format element. This page is called from output
	formats management page or format template management page or
	format elements documentation.

	The page only shows the status of one of the format, depending on
	the specified one. If multiple are specified, shows the first one.

	@param ln: language
	@param bfo: an output format 6 chars code
	@param bft: a format element filename
	@param bfe: a format element name
	"""

	if bfo is not None:
	errors = check_output_format(bfo)
	messages = get_msgs_for_code_list(code_list = errors, ln=ln)
	elif bft is not None:
	errors = check_format_template(bft, checking=1)
	messages = get_msgs_for_code_list(code_list = errors, ln=ln)
	elif bfe is not None:
	errors = check_format_element(bfe)
	messages = get_msgs_for_code_list(code_list = errors, ln=ln)

	if messages is None:
	messages = []

	messages = map(lambda x: encode_for_xml(x[1]), messages)

	return bibformat_templates.tmpl_admin_validate_format(ln, messages)


	def check_output_format(code):
	"""
	Returns the list of errors in the output format given by code

	The errors are the formatted errors defined in bibformat_config.py file.

	@param code: the 6 chars code of the output format to check
	@return: a list of errors
	"""
	errors = []
	filename = bibformat_engine.resolve_output_format_filename(code)
	if can_read_output_format(code):
	path = CFG_BIBFORMAT_OUTPUTS_PATH + os.sep + filename
	format = open(path)
	current_tag = ''
	i = 0
	for line in format:
	i += 1
	if line.strip() == "":
	# Ignore blank lines
	continue
	clean_line = line.rstrip("\n\r ") #remove spaces and eol
	if line.strip().endswith(":") or (line.strip().lower().startswith("tag") and line.find('---') == -1):
	# Check tag
	if not clean_line.endswith(":"):
	# Column misses at the end of line
	errors.append(("ERR_BIBFORMAT_OUTPUT_RULE_FIELD_COL", line, i))
	if not clean_line.lower().startswith("tag"):
	# Tag keyword is missing
	errors.append(("ERR_BIBFORMAT_OUTPUT_TAG_MISSING", line, i))
	elif not clean_line.startswith("tag"):
	# Tag was not lower case
	errors.append(("ERR_BIBFORMAT_OUTPUT_WRONG_TAG_CASE", line, i))

	clean_line = clean_line.rstrip(": ") #remove : and spaces at the end of line

	current_tag = "".join(clean_line.split()[1:]).strip() #the tag starts at second position
	if len(clean_line.split()) > 2: #We should only have 'tag' keyword and tag
	errors.append(("ERR_BIBFORMAT_INVALID_OUTPUT_RULE_FIELD", i))
	else:
	if len(check_tag(current_tag)) > 0:
	# Invalid tag
	errors.append(("ERR_BIBFORMAT_INVALID_OUTPUT_RULE_FIELD_tag", current_tag, i))
	if not clean_line.startswith("tag"):
	errors.append(("ERR_BIBFORMAT_INVALID_OUTPUT_RULE_FIELD", i))

	elif line.find('---') != -1:
	# Check condition
	if current_tag == "":
	errors.append(("ERR_BIBFORMAT_OUTPUT_CONDITION_OUTSIDE_FIELD", line, i))

	words = line.split('---')
	if len(words) != 2:
	errors.append(("ERR_BIBFORMAT_INVALID_OUTPUT_CONDITION", line, i))
	template = words[-1].strip()
	path = CFG_BIBFORMAT_TEMPLATES_PATH + os.sep + template
	if not os.path.exists(path):
	errors.append(("ERR_BIBFORMAT_WRONG_OUTPUT_RULE_TEMPLATE_REF", template, i))

	elif line.find(':') != -1 or (line.strip().lower().startswith("default") and line.find('---') == -1):
	# Check default template
	clean_line = line.strip()
	if line.find(':') == -1:
	# Column misses after default
	errors.append(("ERR_BIBFORMAT_OUTPUT_RULE_DEFAULT_COL", line, i))
	if not clean_line.startswith("default"):
	# Default keyword is missing
	errors.append(("ERR_BIBFORMAT_OUTPUT_DEFAULT_MISSING", line, i))
	if not clean_line.startswith("default"):
	# Default was not lower case
	errors.append(("ERR_BIBFORMAT_OUTPUT_WRONG_DEFAULT_CASE", line, i))
	default = "".join(line.split(':')[1]).strip()
	path = CFG_BIBFORMAT_TEMPLATES_PATH + os.sep + default
	if not os.path.exists(path):
	errors.append(("ERR_BIBFORMAT_WRONG_OUTPUT_RULE_TEMPLATE_REF", default, i))

	else:
	# Check others
	errors.append(("ERR_BIBFORMAT_WRONG_OUTPUT_LINE", line, i))
	else:
	errors.append(("ERR_BIBFORMAT_CANNOT_READ_OUTPUT_FILE", filename, ""))

	return errors

	def check_format_template(filename, checking=0):
	"""
	Returns the list of errors in the format template given by its filename

	The errors are the formatted errors defined in bibformat_config.py file.

	@param filename: the filename of the format template to check
	@param checking: the level of checking (0:basic, >=1 extensive (time-consuming))
	@return: a list of errors
	"""
	errors = []
	if can_read_format_template(filename):#Can template be read?
	if filename.endswith('.'+CFG_BIBFORMAT_FORMAT_TEMPLATE_EXTENSION):
	#format_template = bibformat_engine.get_format_template(filename, with_attributes=True)
	format = open("%s%s%s" % (CFG_BIBFORMAT_TEMPLATES_PATH, os.sep, filename))
	code = format.read()
	format.close()
	# Look for name
	match = bibformat_engine.pattern_format_template_name.search(code)
	if match is None:#Is tag <name> defined in template?
	errors.append(("ERR_BIBFORMAT_TEMPLATE_HAS_NO_NAME", filename))

	# Look for description
	match = bibformat_engine.pattern_format_template_desc.search(code)
	if match is None:#Is tag <description> defined in template?
	errors.append(("ERR_BIBFORMAT_TEMPLATE_HAS_NO_DESCRIPTION", filename))

	format_template = bibformat_engine.get_format_template(filename, with_attributes=False)
	code = format_template['code']
	# Look for calls to format elements
	# Check existence of elements and attributes used in call
	elements_call = bibformat_engine.pattern_tag.finditer(code)
	for element_match in elements_call:
	element_name = element_match.group("function_name")
	filename = bibformat_engine.resolve_format_element_filename(element_name)
	if filename is None and not bibformat_dblayer.tag_exists_for_name(element_name): #Is element defined?
	errors.append(("ERR_BIBFORMAT_TEMPLATE_CALLS_UNDEFINED_ELEM", filename, element_name))
	else:
	format_element = bibformat_engine.get_format_element(element_name, with_built_in_params=True)
	if format_element is None:#Can element be loaded?
	if not can_read_format_element(element_name):
	errors.append(("ERR_BIBFORMAT_TEMPLATE_CALLS_UNREADABLE_ELEM", filename, element_name))
	else:
	errors.append(("ERR_BIBFORMAT_TEMPLATE_CALLS_UNLOADABLE_ELEM", element_name, filename))
	else:
	# Are the parameters used defined in element?
	params_call = bibformat_engine.pattern_function_params.finditer(element_match.group())
	all_params = {}
	for param_match in params_call:
	param = param_match.group("param")
	value = param_match.group("value")
	all_params[param] = value
	allowed_params = []

	# Built-in params
	for allowed_param in format_element['attrs']['builtin_params']:
	allowed_params.append(allowed_param['name'])

	# Params defined in element
	for allowed_param in format_element['attrs']['params']:
	allowed_params.append(allowed_param['name'])

	if not param in allowed_params:
	errors.append(("ERR_BIBFORMAT_TEMPLATE_WRONG_ELEM_ARG",
	element_name, param, filename))

	# The following code is too much time consuming. Only do where really requested
	if checking > 0:
	# Try to evaluate, with any object and pattern
	recIDs = perform_request_search()
	if len(recIDs) > 0:
	recID = recIDs[0]
	bfo = bibformat_engine.BibFormatObject(recID, search_pattern="Test")
	(result, errors_) = bibformat_engine.eval_format_element(format_element, bfo, all_params, verbose=7)
	errors.extend(errors_)

	else:# Template cannot be read
	errors.append(("ERR_BIBFORMAT_CANNOT_READ_TEMPLATE_FILE", filename, ""))
	return errors

	def check_format_element(name):
	"""
	Returns the list of errors in the format element given by its name

	The errors are the formatted errors defined in bibformat_config.py file.

	@param name: the name of the format element to check
	@return: a list of errors
	"""
	errors = []
	filename = bibformat_engine.resolve_format_element_filename(name)
	if filename is not None:#Can element be found in files?
	if can_read_format_element(name):#Can element be read?
	# Try to load
	try:
	module_name = filename
	if module_name.endswith(".py"):
	module_name = module_name[:-3]

	module = __import__("invenio.bibformat_elements."+module_name)
	function_format = module.bibformat_elements.__dict__[module_name].format

	# Try to evaluate, with any object and pattern
	recIDs = perform_request_search()
	if len(recIDs) > 0:
	recID = recIDs[0]
	bfo = bibformat_engine.BibFormatObject(recID, search_pattern="Test")
	element = bibformat_engine.get_format_element(name)
	(result, errors_) = bibformat_engine.eval_format_element(element, bfo, verbose=7)
	errors.extend(errors_)
	except Exception, e:
	errors.append(("ERR_BIBFORMAT_IN_FORMAT_ELEMENT", name, e))
	else:
	errors.append(("ERR_BIBFORMAT_CANNOT_READ_ELEMENT_FILE", filename, ""))
	elif bibformat_dblayer.tag_exists_for_name(name):#Can element be found in database?
	pass
	else:
	errors.append(("ERR_BIBFORMAT_CANNOT_RESOLVE_ELEMENT_NAME", name))

	return errors

	def check_tag(tag):
	"""
	Checks the validity of a tag
	"""
	errors = []
	return errors


	def perform_request_dreamweaver_floater():
	"""
	Returns a floater for Dreamweaver with all Format Elements avalaible.
	"""
	# Get format elements lists of attributes
	elements = bibformat_engine.get_format_elements(with_built_in_params=True)

	keys = elements.keys()
	keys.sort()
	elements = map(elements.get, keys)

	def filter_elem(element):
	"""Keep element if is string representation contains all keywords of search_doc_pattern,
	and if its name does not start with a number (to remove 'garbage' from elements in tags table)"""
	if element['type'] != 'python' and \
	element['attrs']['name'][0] in ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']:
	return False
	else:
	return True

	elements = filter(filter_elem, elements)

	return bibformat_templates.tmpl_dreamweaver_floater(CFG_SITE_LANG, elements)

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