Subscribe to threads you created or replied by default

boards/forms/__init__.py

@@ -1,537 +1,538 b''
 import logging
 
 import pytz
 import re
 from PIL import Image
 from django import forms
 from django.core.files.images import get_image_dimensions
 from django.core.files.uploadedfile import SimpleUploadedFile, UploadedFile
 from django.forms.utils import ErrorList
 from django.utils.translation import ugettext_lazy as _, ungettext_lazy
 
 import boards.settings as board_settings
 from boards import utils
 from boards.abstracts.constants import REGEX_TAGS
 from boards.abstracts.settingsmanager import get_settings_manager, \
     SETTING_CONFIRMED_USER
 from boards.abstracts.sticker_factory import get_attachment_by_alias
 from boards.forms.fields import UrlFileField
 from boards.forms.validators import TimeValidator, PowValidator
 from boards.mdx_neboard import formatters
 from boards.models import Attachment
 from boards.models import Tag
 from boards.models.attachment import StickerPack
 from boards.models.attachment.downloaders import download, REGEX_MAGNET
 from boards.models.attachment.viewers import FILE_TYPES_IMAGE
 from boards.models.post import TITLE_MAX_LENGTH
 from boards.settings import SECTION_FORMS
 from boards.utils import validate_file_size, get_file_mimetype, \
     FILE_EXTENSION_DELIMITER, get_tripcode_from_text
 
 FORMAT_PANEL_BUTTON = '<span class="mark_btn" ' \
                       'onClick="addMarkToMsg(\'{}\',  \'{}\')">{}{}{}</span>'
 
 
 REGEX_USERNAMES = re.compile(r'^[\w\s\d,]+$', re.UNICODE)
 REGEX_URL = re.compile(r'^(http|https|ftp):\/\/', re.UNICODE)
 
 VETERAN_POSTING_DELAY = 5
 
 ATTRIBUTE_PLACEHOLDER = 'placeholder'
 ATTRIBUTE_ROWS = 'rows'
 
 TEXT_PLACEHOLDER = _('Type message here. Use formatting panel for more advanced usage.')
 TAGS_PLACEHOLDER = _('music images i_dont_like_tags')
 
 LABEL_TITLE = _('Title')
 LABEL_TEXT = _('Text')
 LABEL_TAG = _('Tag')
 LABEL_SEARCH = _('Search')
 LABEL_FILE = _('File')
 LABEL_DUPLICATES = _('Check for duplicates')
 LABEL_URL = _('Do not download URLs')
 
 ERROR_MANY_FILES = 'You can post no more than %(files)d file.'
 ERROR_MANY_FILES_PLURAL = 'You can post no more than %(files)d files.'
 ERROR_DUPLICATES = 'Some files are already present on the board.'
 
 TAG_MAX_LENGTH = 20
 
 TEXTAREA_ROWS = 4
 
 TRIPCODE_DELIM = '##'
 
 # TODO Maybe this may be converted into the database table?
 MIMETYPE_EXTENSIONS = {
     'image/jpeg': 'jpeg',
     'image/png': 'png',
     'image/gif': 'gif',
     'video/webm': 'webm',
     'application/pdf': 'pdf',
     'x-diff': 'diff',
     'image/svg+xml': 'svg',
     'application/x-shockwave-flash': 'swf',
     'image/x-ms-bmp': 'bmp',
     'image/bmp': 'bmp',
 }
 
 DOWN_MODE_DOWNLOAD = 'DOWNLOAD'
 DOWN_MODE_DOWNLOAD_UNIQUE = 'DOWNLOAD_UNIQUE'
 DOWN_MODE_URL = 'URL'
 DOWN_MODE_TRY = 'TRY'
 
 
 logger = logging.getLogger('boards.forms')
 
 
 def get_timezones():
     timezones = []
     for tz in pytz.common_timezones:
         timezones.append((tz, tz),)
     return timezones
 
 
 class FormatPanel(forms.Textarea):
     """
     Panel for text formatting. Consists of buttons to add different tags to the
     form text area.
     """
 
     def render(self, name, value, attrs=None):
         output_template = '<div id="mark-panel">{}</div>'
 
         buttons = [self._get_button(formatter) for formatter in formatters]
 
         output = output_template.format(''.join(buttons))
 
         output += super(FormatPanel, self).render(name, value, attrs=attrs)
 
         return output
 
     def _get_button(self, formatter):
         return FORMAT_PANEL_BUTTON.format(
             formatter.format_left,
             formatter.format_right,
             formatter.preview_left,
             formatter.name,
             formatter.preview_right)
 
 
 class PlainErrorList(ErrorList):
     def __unicode__(self):
         return self.as_text()
 
     def as_text(self):
         return ''.join(['(!) %s ' % e for e in self])
 
 
 class NeboardForm(forms.Form):
     """
     Form with neboard-specific formatting.
     """
     required_css_class = 'required-field'
 
     def as_div(self):
         """
         Returns this form rendered as HTML <as_div>s.
         """
 
         return self._html_output(
             # TODO Do not show hidden rows in the list here
             normal_row='<div class="form-row">'
                        '<div class="form-label">'
                        '%(label)s'
                        '</div>'
                        '<div class="form-input">'
                        '%(field)s'
                        '</div>'
                        '</div>'
                        '<div class="form-row">'
                        '%(help_text)s'
                        '</div>',
             error_row='<div class="form-row">'
                       '<div class="form-label"></div>'
                       '<div class="form-errors">%s</div>'
                       '</div>',
             row_ender='</div>',
             help_text_html='%s',
             errors_on_separate_row=True)
 
     def as_json_errors(self):
         errors = []
 
         for name, field in list(self.fields.items()):
             if self[name].errors:
                 errors.append({
                     'field': name,
                     'errors': self[name].errors.as_text(),
                 })
 
         return errors
 
 
 class PostForm(NeboardForm):
 
     title = forms.CharField(max_length=TITLE_MAX_LENGTH, required=False,
                             label=LABEL_TITLE,
                             widget=forms.TextInput(
                                 attrs={ATTRIBUTE_PLACEHOLDER: 'Title{}tripcode'.format(TRIPCODE_DELIM)}))
     text = forms.CharField(
         widget=FormatPanel(attrs={
             ATTRIBUTE_PLACEHOLDER: TEXT_PLACEHOLDER,
             ATTRIBUTE_ROWS: TEXTAREA_ROWS,
         }),
         required=False, label=LABEL_TEXT)
     download_mode = forms.ChoiceField(
             choices=(
                 (DOWN_MODE_TRY, _('Download or insert as URLs')),
                 (DOWN_MODE_DOWNLOAD, _('Download')),
                 (DOWN_MODE_DOWNLOAD_UNIQUE, _('Download and check for uniqueness')),
                 (DOWN_MODE_URL, _('Insert as URLs')),
             ),
             initial=DOWN_MODE_TRY,
             label=_('File process mode'))
     file = UrlFileField(required=False, label=LABEL_FILE)
 
     # This field is for spam prevention only
     email = forms.CharField(max_length=100, required=False, label=_('e-mail'),
                             widget=forms.TextInput(attrs={
                                 'class': 'form-email'}))
-    subscribe = forms.BooleanField(required=False, label=_('Subscribe to thread'))
+    subscribe = forms.BooleanField(required=False,
+            label=_('Subscribe to thread'), initial=True)
 
     guess = forms.CharField(widget=forms.HiddenInput(), required=False)
     timestamp = forms.CharField(widget=forms.HiddenInput(), required=False)
     iteration = forms.CharField(widget=forms.HiddenInput(), required=False)
 
     need_to_ban = False
 
     def __init__(self, data=None, files=None, auto_id='id_%s', prefix=None,
                  initial=None, error_class=ErrorList, label_suffix=None,
                  empty_permitted=False, field_order=None,
                  use_required_attribute=None, renderer=None, session=None):
         super().__init__(data, files, auto_id, prefix, initial, error_class,
                          label_suffix, empty_permitted, field_order,
                          use_required_attribute, renderer)
 
         self.session = session
 
     def clean_title(self):
         title = self.cleaned_data['title']
         if title:
             if len(title) > TITLE_MAX_LENGTH:
                 raise forms.ValidationError(_('Title must have less than %s '
                                               'characters') %
                                             str(TITLE_MAX_LENGTH))
         return title
 
     def clean_text(self):
         text = self.cleaned_data['text'].strip()
         if text:
             max_length = board_settings.get_int(SECTION_FORMS, 'MaxTextLength')
             if len(text) > max_length:
                 raise forms.ValidationError(_('Text must have less than %s '
                                               'characters') % str(max_length))
         return text
 
     def clean_file(self):
         return self._clean_files(self.cleaned_data['file'])
 
     def clean(self):
         cleaned_data = super(PostForm, self).clean()
 
         if cleaned_data['email']:
             if board_settings.get_bool(SECTION_FORMS, 'Autoban'):
                 self.need_to_ban = True
             raise forms.ValidationError('A human cannot enter a hidden field')
 
         if not self.errors:
             self._clean_text_file()
 
         limit_speed = board_settings.get_bool(SECTION_FORMS, 'LimitPostingSpeed')
         limit_first = board_settings.get_bool(SECTION_FORMS, 'LimitFirstPosting')
 
         settings_manager = get_settings_manager(self)
         if not self.errors and limit_speed or (limit_first and not settings_manager.get_setting(SETTING_CONFIRMED_USER)):
             pow_difficulty = board_settings.get_int(SECTION_FORMS, 'PowDifficulty')
             if pow_difficulty > 0:
                 validator = PowValidator(
                     self.session, cleaned_data['timestamp'],
                     cleaned_data['iteration'], cleaned_data['guess'],
                     cleaned_data['text'])
             else:
                 validator = TimeValidator(self.session)
 
             validator.validate()
             for error in validator.get_errors():
                 self._add_general_error(error)
 
             settings_manager.set_setting(SETTING_CONFIRMED_USER, True)
         if self.cleaned_data['download_mode'] == DOWN_MODE_DOWNLOAD_UNIQUE:
             self._check_file_duplicates(self.get_files())
 
         return cleaned_data
 
     def get_files(self):
         """
         Gets file from form or URL.
         """
 
         files = []
         for file in self.cleaned_data['file']:
             if isinstance(file, UploadedFile):
                 files.append(file)
 
         return files
 
     def get_file_urls(self):
         files = []
         for file in self.cleaned_data['file']:
             if type(file) == str:
                 files.append(file)
 
         return files
 
     def get_tripcode(self):
         title = self.cleaned_data['title']
         if title is not None and TRIPCODE_DELIM in title:
             tripcode = get_tripcode_from_text(title.split(TRIPCODE_DELIM, maxsplit=1)[1])
         else:
             tripcode = ''
         return tripcode
 
     def get_title(self):
         title = self.cleaned_data['title']
         if title is not None and TRIPCODE_DELIM in title:
             return title.split(TRIPCODE_DELIM, maxsplit=1)[0]
         else:
             return title
 
     def get_images(self):
         return self.cleaned_data.get('stickers', [])
 
     def is_subscribe(self):
         return self.cleaned_data['subscribe']
 
     def _update_file_extension(self, file):
         if file:
             mimetype = get_file_mimetype(file)
             extension = MIMETYPE_EXTENSIONS.get(mimetype)
             if extension:
                 filename = file.name.split(FILE_EXTENSION_DELIMITER, 1)[0]
                 new_filename = filename + FILE_EXTENSION_DELIMITER + extension
 
                 file.name = new_filename
             else:
                 logger.info('Unrecognized file mimetype: {}'.format(mimetype))
 
     def _clean_files(self, inputs):
         files = []
 
         max_file_count = board_settings.get_int(SECTION_FORMS, 'MaxFileCount')
         if len(inputs) > max_file_count:
             raise forms.ValidationError(
                 ungettext_lazy(ERROR_MANY_FILES, ERROR_MANY_FILES,
                                max_file_count) % {'files': max_file_count})
 
         size = 0
         for file_input in inputs:
             if isinstance(file_input, UploadedFile):
                 file = self._clean_file_file(file_input)
                 size += file.size
                 files.append(file)
             else:
                 files.append(self._clean_file_url(file_input))
 
         for file in files:
             self._validate_image_dimensions(file)
         validate_file_size(size)
 
         return files
 
     def _validate_image_dimensions(self, file):
         if isinstance(file, UploadedFile):
             mimetype = get_file_mimetype(file)
             if mimetype.split('/')[-1] in FILE_TYPES_IMAGE:
                 Image.warnings.simplefilter('error', Image.DecompressionBombWarning)
                 try:
                     print(get_image_dimensions(file))
                 except Exception:
                     raise forms.ValidationError('Possible decompression bomb or large image.')
 
     def _clean_file_file(self, file):
         self._update_file_extension(file)
 
         return file
 
     def _clean_file_url(self, url):
         file = None
 
         if url:
             mode = self.cleaned_data['download_mode']
             if mode == DOWN_MODE_URL:
                 return url
 
             try:
                 image = get_attachment_by_alias(url, self.session)
                 if image is not None:
                     if 'stickers' not in self.cleaned_data:
                         self.cleaned_data['stickers'] = []
                     self.cleaned_data['stickers'].append(image)
                     return
 
                 if file is None:
                     file = self._get_file_from_url(url)
                     if not file:
                         raise forms.ValidationError(_('Invalid URL'))
                 self._update_file_extension(file)
             except forms.ValidationError as e:
                 # Assume we will get the plain URL instead of a file and save it
                 if mode == DOWN_MODE_TRY and (REGEX_URL.match(url) or REGEX_MAGNET.match(url)):
                     logger.info('Error in forms: {}'.format(e))
                     return url
                 else:
                     raise e
 
         return file
 
     def _clean_text_file(self):
         text = self.cleaned_data.get('text')
         file = self.get_files()
         file_url = self.get_file_urls()
         images = self.get_images()
 
         if (not text) and (not file) and (not file_url) and len(images) == 0:
             error_message = _('Either text or file must be entered.')
             self._add_general_error(error_message)
 
     def _get_file_from_url(self, url: str) -> SimpleUploadedFile:
         """
         Gets an file file from URL.
         """
 
         try:
             return download(url)
         except forms.ValidationError as e:
             raise e
         except Exception as e:
             raise forms.ValidationError(e)
 
     def _check_file_duplicates(self, files):
         for file in files:
             file_hash = utils.get_file_hash(file)
             if Attachment.objects.get_existing_duplicate(file_hash, file):
                 self._add_general_error(_(ERROR_DUPLICATES))
 
     def _add_general_error(self, message):
         self.add_error('text', forms.ValidationError(message))
 
 
 class ThreadForm(PostForm):
 
     tags = forms.CharField(
         widget=forms.TextInput(attrs={ATTRIBUTE_PLACEHOLDER: TAGS_PLACEHOLDER}),
         max_length=100, label=_('Tags'), required=True)
     monochrome = forms.BooleanField(label=_('Monochrome'), required=False)
     stickerpack = forms.BooleanField(label=_('Sticker Pack'), required=False)
 
     def clean_tags(self):
         tags = self.cleaned_data['tags'].strip()
 
         if not tags or not REGEX_TAGS.match(tags):
             raise forms.ValidationError(
                 _('Inappropriate characters in tags.'))
 
         default_tag_name = board_settings.get(SECTION_FORMS, 'DefaultTag')\
                 .strip().lower()
 
         required_tag_exists = False
         tag_set = set()
         for tag_string in tags.split():
             tag_name = tag_string.strip().lower()
             if tag_name == default_tag_name:
                 required_tag_exists = True
                 tag, created = Tag.objects.get_or_create_with_alias(
                         name=tag_name, required=True)
             else:
                 tag, created = Tag.objects.get_or_create_with_alias(name=tag_name)
             tag_set.add(tag)
 
             # If this is a new tag, don't check for its parents because nobody
             # added them yet
             if not created:
                 tag_set |= set(tag.get_all_parents())
 
         for tag in tag_set:
             if tag.required:
                 required_tag_exists = True
                 break
 
         # Use default tag if no section exists
         if not required_tag_exists:
             default_tag, created = Tag.objects.get_or_create_with_alias(
                     name=default_tag_name, required=True)
             tag_set.add(default_tag)
 
         return tag_set
 
     def clean(self):
         cleaned_data = super(ThreadForm, self).clean()
 
         return cleaned_data
 
     def is_monochrome(self):
         return self.cleaned_data['monochrome']
 
     def clean_stickerpack(self):
         stickerpack = self.cleaned_data['stickerpack']
         if stickerpack:
             tripcode = self.get_tripcode()
             if not tripcode:
                 raise forms.ValidationError(_(
                     'Tripcode should be specified to own a stickerpack.'))
             title = self.get_title()
             if not title:
                 raise forms.ValidationError(_(
                     'Title should be specified as a stickerpack name.'))
             if not REGEX_TAGS.match(title):
                 raise forms.ValidationError(_('Inappropriate sticker pack name.'))
 
             existing_pack = StickerPack.objects.filter(name=title).first()
             if existing_pack:
                 if existing_pack.tripcode != tripcode:
                     raise forms.ValidationError(_(
                         'A sticker pack with this name already exists and is'
                         ' owned by another tripcode.'))
                 if not existing_pack.tripcode:
                     raise forms.ValidationError(_(
                         'This sticker pack can only be updated by an '
                         'administrator.'))
 
         return stickerpack
 
     def is_stickerpack(self):
         return self.cleaned_data['stickerpack']
 
 
 class SettingsForm(NeboardForm):
 
     theme = forms.ChoiceField(
             choices=board_settings.get_list_dict('View', 'Themes'),
             label=_('Theme'))
     image_viewer = forms.ChoiceField(
             choices=board_settings.get_list_dict('View', 'ImageViewers'),
             label=_('Image view mode'))
     username = forms.CharField(label=_('User name'), required=False)
     timezone = forms.ChoiceField(choices=get_timezones(), label=_('Time zone'))
 
     def clean_username(self):
         username = self.cleaned_data['username']
 
         if username and not REGEX_USERNAMES.match(username):
             raise forms.ValidationError(_('Inappropriate characters.'))
 
         return username
 
 
 class SearchForm(NeboardForm):
     query = forms.CharField(max_length=500, label=LABEL_SEARCH, required=False)

boards/static/js/form.js

@@ -1,329 +1,328 b''
 var ITEM_FILE_SOURCE = 'fileSource';
 var URL_STICKERS = '/api/stickers';
 var MIN_INPUT_LENGTH = 3;
 var URL_DELIMITER = '\n';
 // TODO This needs to be the same for attachment download time limit.
 var POST_AJAX_TIMEOUT = 30000;
 var REPLY_TO_MSG = '.reply-to-message';
 
 var pastedImages = [];
 
 $('input[name=image]').wrap($('<div class="file_wrap"></div>'));
 
 $('body').on('change', 'input[name=image]', function(event) {
     var file = event.target.files[0];
 
     if(file.type.match('image.*')) {
         var fileReader = new FileReader();
 
         fileReader.addEventListener("load", function(event) {
             var wrapper = $('.file_wrap');
 
             wrapper.find('.file-thumb').remove();
             wrapper.append(
                 $('<div class="file-thumb" style="background-image: url('+event.target.result+')"></div>')
             );
         });
 
         fileReader.readAsDataURL(file);
     }
 });
 
 var form = $('#form');
 $('textarea').keypress(function(event) {
     if ((event.which == 10 || event.which == 13) && event.ctrlKey) {
         form.find('input[type=submit]').click();
     }
 });
 
 $('#preview-button').click(function() {
     var data = {
         raw_text: $('textarea#id_text').val()
     }
 
     var diffUrl = '/api/preview/';
 
     $.post(diffUrl,
         data,
         function(data) {
             var previewTextBlock = $('#preview-text');
             previewTextBlock.html(data);
             previewTextBlock.show();
 
             addScriptsToPost(previewTextBlock);
         })
 });
 
 /**
  * Show text in the errors row of the form.
  * @param form
  * @param text
  */
 function showAsErrors(form, text) {
     form.children('.form-errors').remove();
 
     if (text.length > 0) {
         var errorList = $('<div class="form-errors">' + text + '<div>');
         errorList.appendTo(form);
     }
 }
 
 function addHiddenInput(form, name, value) {
     form.find('input[name=' + name + ']').val(value);
 }
 
 function selectFileChoice() {
     var file_input = $('#id_file');
     var url_input = $('#id_file_url');
 
     var file_input_row = file_input.parent().parent();
     var url_input_row = url_input.parent().parent();
 
     file_input_row.toggle();
     url_input_row.toggle();
     url_input.val('');
     file_input.val('');
 
     var source;
     if (file_input_row.is(':visible')) {
         source = 'file';
     } else {
         source = 'url';
     }
     localStorage.setItem(ITEM_FILE_SOURCE, source);
 }
 
 function getPostTextarea() {
     return $('textarea#id_text');
 }
 
 function addOnImagePaste() {
     $('#id_file_1').on('paste', function(event) {
         var items = (event.clipboardData || event.originalEvent.clipboardData).items;
         for (index in items) {
             var item = items[index];
             if (item.kind === 'file') {
                 var blob = item.getAsFile();
 
                 pastedImages.push(blob);
 
                 var pastedImagesList = $('#pasted-images');
                 if (pastedImagesList.length === 0) {
                     pastedImagesList = $('<div id="pasted-images" />');
                     $('#id_file_1').parent().append(pastedImagesList);
                 }
 
                 var fr = new FileReader();
                 fr.onload = function () {
                     var img = $('<img class="image-preview" />');
                     img.attr('src', fr.result);
                     pastedImagesList.append(img);
                     img.on("click", function() {
                         // Remove the image from all lists
                         var itemIndex = $(this).index();
                         pastedImages.splice(itemIndex, 1);
                         $(this).remove();
                     });
                 };
                 fr.readAsDataURL(blob);
             }
         }
     });
 }
 
 /**
  * When the form is posted, this method will be run as a callback
  */
 function updateOnPost(response, statusText, xhr, form) {
     var json = $.parseJSON(response);
     var status = json.status;
     var url = json.url;
 
     showAsErrors(form, '');
     $('.post-form-w').unblock();
 
     if (status === 'ok') {
         if (url) {
             document.location = url;
         } else {
             resetForm();
             getThreadDiff();
             scrollToBottom();
         }
     } else {
         var errors = json.errors;
         for (var i = 0; i < errors.length; i++) {
             var fieldErrors = errors[i];
 
             var error = fieldErrors.errors;
 
             showAsErrors(form, error);
         }
     }
 }
 
 function initAjaxForm(openingPostId) {
     var form = $('#form');
 
     var url = '/api/add_post/';
     if (openingPostId) {
         url += openingPostId + '/';
     }
 
     if (form.length > 0) {
         var options = {
             beforeSubmit: function(arr, form, options) {
                 $('.post-form-w').block({ message: gettext('Sending message...') });
 
                 $.each(pastedImages, function(i, blob) {
                     arr.push({
                         name: "file_0",
                         value: blob
                     });
                 });
             },
             success: updateOnPost,
             error: function(xhr, textStatus, errorString) {
                 var errorText = gettext('Server error: ') + textStatus;
                 if (errorString) {
                     errorText += ' / ' + errorString;
                 }
                 showAsErrors(form, errorText);
                 $('.post-form-w').unblock();
             },
             url: url,
             timeout: POST_AJAX_TIMEOUT
         };
 
         form.ajaxForm(options);
     }
 }
 
 function getForm() {
     return $('.post-form-w');
 }
 
 /**
  * Clear all entered values in the form fields
  */
 function resetForm() {
     var form = getForm();
 
     form.find('input:text, input:password, input:file, textarea').val('');
-    form.find('input:radio, input:checkbox').removeAttr('checked').removeAttr('selected');
     pastedImages = [];
     $('#pasted-images').remove();
     $('.file_wrap').find('.file-thumb').remove();
     $('#preview-text').hide();
 
     resetFormPosition(form);
 }
 
 function resetFormPosition(form) {
     form.insertBefore($('footer'));
 
     $(REPLY_TO_MSG).hide();
 }
 
 $(document).ready(function() {
     var powDifficulty = parseInt($('body').attr('data-pow-difficulty'));
     if (powDifficulty > 0 && typeof SharedWorker != 'undefined') {
         var worker = new SharedWorker($('.post-form').attr('data-pow-script'));
         worker.port.onmessage = function(e) {
             var form = $('#form');
             addHiddenInput(form, 'timestamp', e.data.timestamp);
             addHiddenInput(form, 'iteration', e.data.iteration);
             addHiddenInput(form, 'guess', e.data.guess);
 
             form.submit();
             $('.post-form-w').unblock();
         };
         worker.onerror = function(event){
             throw new Error(event.message + " (" + event.filename + ":" + event.lineno + ")");
         };
         worker.port.start();
 
         var form = $('#form');
         var submitButton = form.find('input[type=submit]');
         submitButton.click(function() {
             showAsErrors(form, gettext('Computing PoW...'));
             $('.post-form-w').block({ message: gettext('Computing PoW...') })
 
             var msg = $('textarea#id_text').val().trim();
 
             var data = {
                 msg: msg,
                 difficulty: parseInt($('body').attr('data-pow-difficulty')),
                 hasher: $('.post-form').attr('data-hasher')
             };
             worker.port.postMessage(data);
 
             return false;
         });
     }
 
     var $fileSourceButton = $('#file-source-button');
     if (window.localStorage) {
         var source = localStorage.getItem(ITEM_FILE_SOURCE);
         if (source == null) {
             source = 'file';
         }
         if (source == 'file') {
             $('#id_file_url').parent().parent().hide();
         } else {
             $('#id_file').parent().parent().hide();
         }
 
         $fileSourceButton.click(function() {
             selectFileChoice();
         });
     } else {
         $fileSourceButton.hide();
     }
 
     addOnImagePaste();
 
     // Stickers autocomplete
     function split( val ) {
         return val.split(URL_DELIMITER);
     }
 
     function extractLast( term ) {
         return split(term).pop();
     }
 
     $('#id_file_1').autocomplete({
         source: function( request, response ) {
             $.getJSON(URL_STICKERS, {
                 term: extractLast( request.term )
             }, response);
         },
         search: function() {
             // custom minLength
             var term = extractLast( this.value );
             if (term.length < MIN_INPUT_LENGTH) {
                 return false;
             }
         },
         focus: function() {
             // prevent value inserted on focus
             return false;
         },
         select: function( event, ui ) {
             var terms = split( this.value );
             // remove the current input
             terms.pop();
             // add the selected item
             terms.push( ui.item.alias );
             // add placeholder to get the comma-and-space at the end
             terms.push("");
             this.value = terms.join(URL_DELIMITER);
             return false;
         }
     })
     .autocomplete( "instance" )._renderItem = function( ul, item ) {
         return $( "<li>" )
             .append( "<div>" + '<img src="' + item.thumb + '">' + '<br />' + item.alias + "</div>" )
             .appendTo( ul );
     };
 });