app/soc/views/helper/widgets.py
author Pawel Solyga <Pawel.Solyga@gmail.com>
Thu, 16 Oct 2008 16:05:08 +0000
changeset 359 4308324241bc
parent 345 27c3c63da9ac
child 408 7cd6bdfbf95c
permissions -rw-r--r--
DeadlineExceededError in the recent version of AppEngine lives only in one place so there is no need to try import it from both runtime (deployed) and runtime.apiproxy_errors (dev server) modules anymore. Patch by: Pawel Solyga Review by: to-be-reviewed
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#!/usr/bin/python2.5
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#
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# Copyright 2008 the Melange authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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#   http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Custom widgets used for form fields.
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"""
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__authors__ = [
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  '"Pawel Solyga" <pawel.solyga@gmail.com>',
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  ]
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import copy
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from django import forms
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from django.forms import util
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from django.forms import widgets
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from django.utils import html
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from django.utils import simplejson
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from django.utils import safestring
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class ReadOnlyInput(forms.widgets.Input):
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  """Read only input widget.
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  """
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  input_type = 'text'
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  def render(self, name, value, attrs=None):
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    """Render ReadOnlyInput widget as HTML.
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    """
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    attrs['readonly'] = 'readonly'
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    return super(ReadOnlyInput, self).render(name, value, attrs)
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class TinyMCE(forms.widgets.Textarea):
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  """TinyMCE widget. 
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  Requires to include tiny_mce_src.js in your template. Widget can be
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  customized by overwriting or adding extra options to mce_settings
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  dictionary
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  You can set TinyMCE widget for particular form field using code below:
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    class ExampleForm(helper.forms.DbModelForm):
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      content = forms.fields.CharField(widget=helper.widgets.TinyMCE())
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  You can include tiny_mce_src.js in your template using:
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    {% block scripts %}
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  	  <script type="text/javascript" src="/tiny_mce/tiny_mce_src.js"></script>
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    {% endblock %}
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  """ 
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  DEF_MCE_SETTINGS = {'mode': "exact",
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                      'theme': "simple",
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                      'theme_advanced_toolbar_location': "top",
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                      'theme_advanced_toolbar_align': "center"}
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  TINY_MCE_HTML_FMT = u'''\
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<textarea %(attrs)s>%(value)s</textarea>
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<script type="text/javascript">
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tinyMCE.init(%(settings_json)s)
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</script>'''
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  def __init__(self, mce_settings=None, *args, **kwargs):
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    """Initialize TinyMCE widget with default or customized settings
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    Args:
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      mce_settings: dict with TinyMCE widget settings
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      *args, **kwargs:  passed through to parent __init__() constructor
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    """
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    super(forms.widgets.Textarea, self).__init__(*args, **kwargs)
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    # copy the class defaults to an instance data member
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    self.mce_settings = copy.deepcopy(self.DEF_MCE_SETTINGS)
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    if mce_settings:
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      # modify the per-instance settings if called supplied customizations
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      self.mce_settings.update(mce_settings)
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  def render(self, name, value, attrs=None):
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    """Render TinyMCE widget as HTML.
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    """
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    if value is None:
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      value = ''
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    value = util.smart_unicode(value)
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    final_attrs = self.build_attrs(attrs, name=name)
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    self.mce_settings['elements'] = "id_%s" % name
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    # convert mce_settings from dict to JSON
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    mce_json = simplejson.JSONEncoder().encode(self.mce_settings)
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    return safestring.mark_safe(self.TINY_MCE_HTML_FMT % 
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        {'attrs': widgets.flatatt(final_attrs),
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         'value': html.escape(value), 
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         'settings_json':  mce_json})