#!/usr/bin/python2.5

#

# Copyright 2008 the Melange authors.

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

#   http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

"""Custom widgets used for form fields.

"""

__authors__ = [

  '"Pawel Solyga" <pawel.solyga@gmail.com>',

  '"Sverre Rabbelier" <sverre@rabbelier.nl>',

  ]

from django import forms

from django.forms import util

from django.forms import widgets

from django.utils import html

from django.utils import simplejson

from django.utils import safestring

from soc.logic import dicts

class ReadOnlyInput(forms.widgets.Input):

  """Read only input widget.

  """

  input_type = 'text'

  def render(self, name, value, attrs=None):

    """Render ReadOnlyInput widget as HTML.

    """

    attrs['readonly'] = 'readonly'

    attrs['class'] = 'plaintext'

    return super(ReadOnlyInput, self).render(name, value, attrs)

class PlainTextWidget(forms.widgets.Widget):

  """Read only input widget.

  """

  def render(self, name, value, attrs=None):

    """Render ReadOnlyInput widget as HTML.

    """

    return str(value) if value else ""

class FullTinyMCE(forms.widgets.Textarea):

  """TinyMCE widget. 

  Requires to include tiny_mce_src.js in your template. Widget can be

  customized by overwriting or adding extra options to mce_settings

  dictionary

  You can set TinyMCE widget for particular form field using code below:

    class ExampleForm(helper.forms.BaseForm):

      content = forms.fields.CharField(widget=helper.widgets.TinyMCE())

  You can include tiny_mce.js in your template using:

    {% block scripts %}

  	  <script type="text/javascript" src="/tiny_mce/tiny_mce.js"></script>

    {% endblock %}

  """ 

  features1 = ("bold,italic,underline,strikethrough,blockquote,|,"

              ",justifyleft,justifycenter,justifyright,justifyfull,|,"

              "formatselect")

  features2 = ("newdocument,|,bullist,numlist,|,outdent,indent,|,undo,redo,|"

      ",link,unlink,anchor,image,cleanup,help,code,hr,removeformat,visualaid,|,"

      "sub,sup,|,charmap,"

      "")

  DEF_MCE_SETTINGS = {

      'mode': "exact",

      'theme': "advanced",

      'theme_advanced_buttons1': features1,

      'theme_advanced_buttons2': features2,

      'theme_advanced_buttons3': '',

      'theme_advanced_resizing': True,

      'theme_advanced_toolbar_location': "top",

      'theme_advanced_statusbar_location': "bottom",

      'theme_advanced_path' : False,

      'theme_advanced_toolbar_align': "left",

      'relative_urls': 0,

      'remove_script_host': 0,

      }

  TINY_MCE_HTML_FMT = u'''\

<textarea %(attrs)s>%(value)s</textarea>

<script type="text/javascript">

tinyMCE.init(%(settings_json)s)

</script>'''

  def __init__(self, mce_settings=None, *args, **kwargs):

    """Initialize TinyMCE widget with default or customized settings.

    Args:

      mce_settings: dict with TinyMCE widget settings

      *args, **kwargs:  passed through to parent __init__() constructor

    """

    super(FullTinyMCE, self).__init__(*args, **kwargs)

    self.mce_settings = self.DEF_MCE_SETTINGS

  def render(self, name, value, attrs=None):

    """Render TinyMCE widget as HTML.

    """

    if value is None:

      value = ''

    value = util.smart_unicode(value)

    final_attrs = self.build_attrs(attrs, name=name)

    self.mce_settings['elements'] = "id_%s" % name

    # convert mce_settings from dict to JSON

    mce_json = simplejson.JSONEncoder().encode(self.mce_settings)

    return safestring.mark_safe(self.TINY_MCE_HTML_FMT % 

        {'attrs': widgets.flatatt(final_attrs),

         'value': html.escape(value), 

         'settings_json':  mce_json})

class TinyMCE(FullTinyMCE):

  """Regular version of TinyMce

  """

  def __init__(self, *args, **kwargs):

    """

    """

    super(TinyMCE, self).__init__(*args, **kwargs)

    keys = ['mode', 'theme', 'theme_advanced_toolbar_location',

            'theme_advanced_toolbar_align', 'relative_urls',

            'remove_script_host']

    self.mce_settings = dicts.filter(self.mce_settings, keys)

class ReferenceField(forms.CharField):

  """Widget for selecting a reference to an Entity.

  """

  def __init__(self, reference_url, filter=None, filter_fields=None,

               *args, **kwargs):

    """Initializes the widget with the specified url and filter.

    """

    self.rf = {}

    self.rf['reference_url'] = reference_url

    self.rf['filter'] = filter if filter else []

    self.rf['filter_fields'] = filter_fields if filter_fields else {}

    super(ReferenceField, self).__init__(*args, **kwargs)

class AgreementField(widgets.Widget):

  """Widget for selecting a reference to an Entity.

  """

  HTML_CODE = """

  <span style="width:450px" colspan="4">

    <div id="ToS" style="overflow:auto;height:500px">

      %(text)s

    </div>

  </span>

  %(url)s

  """

  def __init__(self, *args, **kwargs):

    self.text = "No Agreement Text Specified"

    self.url = ""

    super(AgreementField, self).__init__(*args, **kwargs)

  def render(self, name, value, attrs=None):

    """HTML renderer for Agreement field.

    """

    url_text = '<a href="%s" target="_blank">Full Text</a>'

    url = url_text % self.url if self.url else ""

    value = self.text.replace('\n', '<BR />')

    result = self.HTML_CODE % {'url': url, 'text': value}

    return result