1 ### -*- coding: utf-8 -*- ####################################################

     2 ##############################################################################

     3 #

     4 # Copyright (c) 2008-2010 Thierry Florac <tflorac AT ulthar.net>

     5 # All Rights Reserved.

     6 #

     7 # This software is subject to the provisions of the Zope Public License,

     8 # Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.

     9 # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED

    10 # WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

    11 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS

    12 # FOR A PARTICULAR PURPOSE.

    13 #

    14 ##############################################################################

    15 

    16 __docformat__ = "restructuredtext"

    17 

    18 # import standard packages

    19 

    20 # import Zope3 interfaces

    21 

    22 # import local interfaces

    23 

    24 # import Zope3 packages

    25 from zope.component import createObject, queryMultiAdapter

    26 

    27 # import local packages

    28 from ztfy.utils.request import getRequest

    29 

    30 

    31 def textStart(text, length, max=0):

    32     """Get first words of given text with maximum given length

    33     

    34     If @max is specified, text is shortened only if remaining text is longer than @max

    35     

    36     @param text: initial text

    37     @param length: maximum length of resulting text

    38     @param max: if > 0, @text is shortened only if remaining text is longer than max

    39     """

    40     result = text or ''

    41     if length > len(result):

    42         return result

    43     index = length - 1

    44     text_length = len(result)

    45     while (index > 0) and (result[index] != ' '):

    46         index -= 1

    47     if (index > 0) and (text_length > index + max):

    48         return result[:index] + '…'

    49     return text

    50 

    51 

    52 def textToHTML(text, renderer='zope.source.plaintext', request=None):

    53     if request is None:

    54         request = getRequest()

    55     formatter = createObject(renderer, text)

    56     renderer = queryMultiAdapter((formatter, request), name=u'')

    57     return renderer.render()

    58 

    59 

    60 class Renderer(object):

    61 

    62     def __init__(self, context):

    63         self.context = context

    64 

    65     def render(self, renderer, request=None):

    66         if not self.context:

    67             return u''

    68         return textToHTML(self.context, renderer, request)