allow alternative gravatar URL

rhodecode/lib/helpers.py

@@ -1,1045 +1,1049
 """Helper functions
 
 Consists of functions to typically be used within templates, but also
 available to Controllers. This module is available to both as 'h'.
 """
 import random
 import hashlib
 import StringIO
 import urllib
 import math
 import logging
 import re
 
 from datetime import datetime
 from pygments.formatters.html import HtmlFormatter
 from pygments import highlight as code_highlight
 from pylons import url, request, config
 from pylons.i18n.translation import _, ungettext
 from hashlib import md5
 
 from webhelpers.html import literal, HTML, escape
 from webhelpers.html.tools import *
 from webhelpers.html.builder import make_tag
 from webhelpers.html.tags import auto_discovery_link, checkbox, css_classes, \
     end_form, file, form, hidden, image, javascript_link, link_to, \
     link_to_if, link_to_unless, ol, required_legend, select, stylesheet_link, \
     submit, text, password, textarea, title, ul, xml_declaration, radio
 from webhelpers.html.tools import auto_link, button_to, highlight, \
     js_obfuscate, mail_to, strip_links, strip_tags, tag_re
 from webhelpers.number import format_byte_size, format_bit_size
 from webhelpers.pylonslib import Flash as _Flash
 from webhelpers.pylonslib.secure_form import secure_form
 from webhelpers.text import chop_at, collapse, convert_accented_entities, \
     convert_misc_entities, lchop, plural, rchop, remove_formatting, \
     replace_whitespace, urlify, truncate, wrap_paragraphs
 from webhelpers.date import time_ago_in_words
 from webhelpers.paginate import Page
 from webhelpers.html.tags import _set_input_attrs, _set_id_attr, \
     convert_boolean_attrs, NotGiven, _make_safe_id_component
 
 from rhodecode.lib.annotate import annotate_highlight
 from rhodecode.lib.utils import repo_name_slug
 from rhodecode.lib.utils2 import str2bool, safe_unicode, safe_str, \
     get_changeset_safe
 from rhodecode.lib.markup_renderer import MarkupRenderer
 from rhodecode.lib.vcs.exceptions import ChangesetDoesNotExistError
 from rhodecode.lib.vcs.backends.base import BaseChangeset
 from rhodecode.config.conf import DATE_FORMAT, DATETIME_FORMAT
 from rhodecode.model.changeset_status import ChangesetStatusModel
 from rhodecode.model.db import URL_SEP, Permission
 
 log = logging.getLogger(__name__)
 
 
 html_escape_table = {
     "&": "&",
     '"': """,
     "'": "'",
     ">": ">",
     "<": "&lt;",
 }
 
 
 def html_escape(text):
     """Produce entities within text."""
     return "".join(html_escape_table.get(c,c) for c in text)
 
 
 def shorter(text, size=20):
     postfix = '...'
     if len(text) > size:
         return text[:size - len(postfix)] + postfix
     return text
 
 
 def _reset(name, value=None, id=NotGiven, type="reset", **attrs):
     """
     Reset button
     """
     _set_input_attrs(attrs, type, name, value)
     _set_id_attr(attrs, id, name)
     convert_boolean_attrs(attrs, ["disabled"])
     return HTML.input(**attrs)
 
 reset = _reset
 safeid = _make_safe_id_component
 
 
 def FID(raw_id, path):
     """
     Creates a uniqe ID for filenode based on it's hash of path and revision
     it's safe to use in urls
 
     :param raw_id:
     :param path:
     """
 
     return 'C-%s-%s' % (short_id(raw_id), md5(safe_str(path)).hexdigest()[:12])
 
 
 def get_token():
     """Return the current authentication token, creating one if one doesn't
     already exist.
     """
     token_key = "_authentication_token"
     from pylons import session
     if not token_key in session:
         try:
             token = hashlib.sha1(str(random.getrandbits(128))).hexdigest()
         except AttributeError:  # Python < 2.4
             token = hashlib.sha1(str(random.randrange(2 ** 128))).hexdigest()
         session[token_key] = token
         if hasattr(session, 'save'):
             session.save()
     return session[token_key]
 
 
 class _GetError(object):
     """Get error from form_errors, and represent it as span wrapped error
     message
 
     :param field_name: field to fetch errors for
     :param form_errors: form errors dict
     """
 
     def __call__(self, field_name, form_errors):
         tmpl = """<span class="error_msg">%s</span>"""
         if form_errors and field_name in form_errors:
             return literal(tmpl % form_errors.get(field_name))
 
 get_error = _GetError()
 
 
 class _ToolTip(object):
 
     def __call__(self, tooltip_title, trim_at=50):
         """
         Special function just to wrap our text into nice formatted
         autowrapped text
 
         :param tooltip_title:
         """
         tooltip_title = escape(tooltip_title)
         tooltip_title = tooltip_title.replace('<', '&lt;').replace('>', '&gt;')
         return tooltip_title
 tooltip = _ToolTip()
 
 
 class _FilesBreadCrumbs(object):
 
     def __call__(self, repo_name, rev, paths):
         if isinstance(paths, str):
             paths = safe_unicode(paths)
         url_l = [link_to(repo_name, url('files_home',
                                         repo_name=repo_name,
                                         revision=rev, f_path=''),
                          class_='ypjax-link')]
         paths_l = paths.split('/')
         for cnt, p in enumerate(paths_l):
             if p != '':
                 url_l.append(link_to(p,
                                      url('files_home',
                                          repo_name=repo_name,
                                          revision=rev,
                                          f_path='/'.join(paths_l[:cnt + 1])
                                          ),
                                      class_='ypjax-link'
                                      )
                              )
 
         return literal('/'.join(url_l))
 
 files_breadcrumbs = _FilesBreadCrumbs()
 
 
 class CodeHtmlFormatter(HtmlFormatter):
     """
     My code Html Formatter for source codes
     """
 
     def wrap(self, source, outfile):
         return self._wrap_div(self._wrap_pre(self._wrap_code(source)))
 
     def _wrap_code(self, source):
         for cnt, it in enumerate(source):
             i, t = it
             t = '<div id="L%s">%s</div>' % (cnt + 1, t)
             yield i, t
 
     def _wrap_tablelinenos(self, inner):
         dummyoutfile = StringIO.StringIO()
         lncount = 0
         for t, line in inner:
             if t:
                 lncount += 1
             dummyoutfile.write(line)
 
         fl = self.linenostart
         mw = len(str(lncount + fl - 1))
         sp = self.linenospecial
         st = self.linenostep
         la = self.lineanchors
         aln = self.anchorlinenos
         nocls = self.noclasses
         if sp:
             lines = []
 
             for i in range(fl, fl + lncount):
                 if i % st == 0:
                     if i % sp == 0:
                         if aln:
                             lines.append('<a href="#%s%d" class="special">%*d</a>' %
                                          (la, i, mw, i))
                         else:
                             lines.append('<span class="special">%*d</span>' % (mw, i))
                     else:
                         if aln:
                             lines.append('<a href="#%s%d">%*d</a>' % (la, i, mw, i))
                         else:
                             lines.append('%*d' % (mw, i))
                 else:
                     lines.append('')
             ls = '\n'.join(lines)
         else:
             lines = []
             for i in range(fl, fl + lncount):
                 if i % st == 0:
                     if aln:
                         lines.append('<a href="#%s%d">%*d</a>' % (la, i, mw, i))
                     else:
                         lines.append('%*d' % (mw, i))
                 else:
                     lines.append('')
             ls = '\n'.join(lines)
 
         # in case you wonder about the seemingly redundant <div> here: since the
         # content in the other cell also is wrapped in a div, some browsers in
         # some configurations seem to mess up the formatting...
         if nocls:
             yield 0, ('<table class="%stable">' % self.cssclass +
                       '<tr><td><div class="linenodiv" '
                       'style="background-color: #f0f0f0; padding-right: 10px">'
                       '<pre style="line-height: 125%">' +
                       ls + '</pre></div></td><td id="hlcode" class="code">')
         else:
             yield 0, ('<table class="%stable">' % self.cssclass +
                       '<tr><td class="linenos"><div class="linenodiv"><pre>' +
                       ls + '</pre></div></td><td id="hlcode" class="code">')
         yield 0, dummyoutfile.getvalue()
         yield 0, '</td></tr></table>'
 
 
 def pygmentize(filenode, **kwargs):
     """pygmentize function using pygments
 
     :param filenode:
     """
 
     return literal(code_highlight(filenode.content,
                                   filenode.lexer, CodeHtmlFormatter(**kwargs)))
 
 
 def pygmentize_annotation(repo_name, filenode, **kwargs):
     """
     pygmentize function for annotation
 
     :param filenode:
     """
 
     color_dict = {}
 
     def gen_color(n=10000):
         """generator for getting n of evenly distributed colors using
         hsv color and golden ratio. It always return same order of colors
 
         :returns: RGB tuple
         """
 
         def hsv_to_rgb(h, s, v):
             if s == 0.0:
                 return v, v, v
             i = int(h * 6.0)  # XXX assume int() truncates!
             f = (h * 6.0) - i
             p = v * (1.0 - s)
             q = v * (1.0 - s * f)
             t = v * (1.0 - s * (1.0 - f))
             i = i % 6
             if i == 0:
                 return v, t, p
             if i == 1:
                 return q, v, p
             if i == 2:
                 return p, v, t
             if i == 3:
                 return p, q, v
             if i == 4:
                 return t, p, v
             if i == 5:
                 return v, p, q
 
         golden_ratio = 0.618033988749895
         h = 0.22717784590367374
 
         for _ in xrange(n):
             h += golden_ratio
             h %= 1
             HSV_tuple = [h, 0.95, 0.95]
             RGB_tuple = hsv_to_rgb(*HSV_tuple)
             yield map(lambda x: str(int(x * 256)), RGB_tuple)
 
     cgenerator = gen_color()
 
     def get_color_string(cs):
         if cs in color_dict:
             col = color_dict[cs]
         else:
             col = color_dict[cs] = cgenerator.next()
         return "color: rgb(%s)! important;" % (', '.join(col))
 
     def url_func(repo_name):
 
         def _url_func(changeset):
             author = changeset.author
             date = changeset.date
             message = tooltip(changeset.message)
 
             tooltip_html = ("<div style='font-size:0.8em'><b>Author:</b>"
                             " %s<br/><b>Date:</b> %s</b><br/><b>Message:"
                             "</b> %s<br/></div>")
 
             tooltip_html = tooltip_html % (author, date, message)
             lnk_format = '%5s:%s' % ('r%s' % changeset.revision,
                                      short_id(changeset.raw_id))
             uri = link_to(
                     lnk_format,
                     url('changeset_home', repo_name=repo_name,
                         revision=changeset.raw_id),
                     style=get_color_string(changeset.raw_id),
                     class_='tooltip',
                     title=tooltip_html
                   )
 
             uri += '\n'
             return uri
         return _url_func
 
     return literal(annotate_highlight(filenode, url_func(repo_name), **kwargs))
 
 
 def is_following_repo(repo_name, user_id):
     from rhodecode.model.scm import ScmModel
     return ScmModel().is_following_repo(repo_name, user_id)
 
 flash = _Flash()
 
 #==============================================================================
 # SCM FILTERS available via h.
 #==============================================================================
 from rhodecode.lib.vcs.utils import author_name, author_email
 from rhodecode.lib.utils2 import credentials_filter, age as _age
 from rhodecode.model.db import User, ChangesetStatus
 
 age = lambda  x: _age(x)
 capitalize = lambda x: x.capitalize()
 email = author_email
 short_id = lambda x: x[:12]
 hide_credentials = lambda x: ''.join(credentials_filter(x))
 
 
 def fmt_date(date):
     if date:
         _fmt = _(u"%a, %d %b %Y %H:%M:%S").encode('utf8')
         return date.strftime(_fmt).decode('utf8')
 
     return ""
 
 
 def is_git(repository):
     if hasattr(repository, 'alias'):
         _type = repository.alias
     elif hasattr(repository, 'repo_type'):
         _type = repository.repo_type
     else:
         _type = repository
     return _type == 'git'
 
 
 def is_hg(repository):
     if hasattr(repository, 'alias'):
         _type = repository.alias
     elif hasattr(repository, 'repo_type'):
         _type = repository.repo_type
     else:
         _type = repository
     return _type == 'hg'
 
 
 def email_or_none(author):
     _email = email(author)
     if _email != '':
         return _email
 
     # See if it contains a username we can get an email from
     user = User.get_by_username(author_name(author), case_insensitive=True,
                                 cache=True)
     if user is not None:
         return user.email
 
     # No valid email, not a valid user in the system, none!
     return None
 
 
 def person(author):
     # attr to return from fetched user
     person_getter = lambda usr: usr.username
 
     # Valid email in the attribute passed, see if they're in the system
     _email = email(author)
     if _email != '':
         user = User.get_by_email(_email, case_insensitive=True, cache=True)
         if user is not None:
             return person_getter(user)
         return _email
 
     # Maybe it's a username?
     _author = author_name(author)
     user = User.get_by_username(_author, case_insensitive=True,
                                 cache=True)
     if user is not None:
         return person_getter(user)
 
     # Still nothing?  Just pass back the author name then
     return _author
 
 
 def desc_stylize(value):
     """
     converts tags from value into html equivalent
 
     :param value:
     """
     value = re.sub(r'\[see\ \=\>\ *([a-zA-Z0-9\/\=\?\&\ \:\/\.\-]*)\]',
                    '<div class="metatag" tag="see">see =&gt; \\1 </div>', value)
     value = re.sub(r'\[license\ \=\>\ *([a-zA-Z0-9\/\=\?\&\ \:\/\.\-]*)\]',
                    '<div class="metatag" tag="license"><a href="http:\/\/www.opensource.org/licenses/\\1">\\1</a></div>', value)
     value = re.sub(r'\[(requires|recommends|conflicts|base)\ \=\>\ *([a-zA-Z\-\/]*)\]',
                    '<div class="metatag" tag="\\1">\\1 =&gt; <a href="/\\2">\\2</a></div>', value)
     value = re.sub(r'\[(lang|language)\ \=\>\ *([a-zA-Z\-\/]*)\]',
                    '<div class="metatag" tag="lang">\\2</div>', value)
     value = re.sub(r'\[([a-z]+)\]',
                   '<div class="metatag" tag="\\1">\\1</div>', value)
 
     return value
 
 
 def bool2icon(value):
     """Returns True/False values represented as small html image of true/false
     icons
 
     :param value: bool value
     """
 
     if value is True:
         return HTML.tag('img', src=url("/images/icons/accept.png"),
                         alt=_('True'))
 
     if value is False:
         return HTML.tag('img', src=url("/images/icons/cancel.png"),
                         alt=_('False'))
 
     return value
 
 
 def action_parser(user_log, feed=False):
     """
     This helper will action_map the specified string action into translated
     fancy names with icons and links
 
     :param user_log: user log instance
     :param feed: use output for feeds (no html and fancy icons)
     """
 
     action = user_log.action
     action_params = ' '
 
     x = action.split(':')
 
     if len(x) > 1:
         action, action_params = x
 
     def get_cs_links():
         revs_limit = 3  # display this amount always
         revs_top_limit = 50  # show upto this amount of changesets hidden
         revs_ids = action_params.split(',')
         deleted = user_log.repository is None
         if deleted:
             return ','.join(revs_ids)
 
         repo_name = user_log.repository.repo_name
 
         repo = user_log.repository.scm_instance
 
         def lnk(rev, repo_name):
 
             if isinstance(rev, BaseChangeset):
                 lbl = 'r%s:%s' % (rev.revision, rev.short_id)
                 _url = url('changeset_home', repo_name=repo_name,
                            revision=rev.raw_id)
                 title = tooltip(rev.message)
             else:
                 lbl = '%s' % rev
                 _url = '#'
                 title = _('Changeset not found')
 
             return link_to(lbl, _url, title=title, class_='tooltip',)
 
         revs = []
         if len(filter(lambda v: v != '', revs_ids)) > 0:
             for rev in revs_ids[:revs_top_limit]:
                 try:
                     rev = repo.get_changeset(rev)
                     revs.append(rev)
                 except ChangesetDoesNotExistError:
                     log.error('cannot find revision %s in this repo' % rev)
                     revs.append(rev)
                     continue
         cs_links = []
         cs_links.append(" " + ', '.join(
             [lnk(rev, repo_name) for rev in revs[:revs_limit]]
             )
         )
 
         compare_view = (
             ' <div class="compare_view tooltip" title="%s">'
             '<a href="%s">%s</a> </div>' % (
                 _('Show all combined changesets %s->%s') % (
                     revs_ids[0], revs_ids[-1]
                 ),
                 url('changeset_home', repo_name=repo_name,
                     revision='%s...%s' % (revs_ids[0], revs_ids[-1])
                 ),
                 _('compare view')
             )
         )
 
         # if we have exactly one more than normally displayed
         # just display it, takes less space than displaying
         # "and 1 more revisions"
         if len(revs_ids) == revs_limit + 1:
             rev = revs[revs_limit]
             cs_links.append(", " + lnk(rev, repo_name))
 
         # hidden-by-default ones
         if len(revs_ids) > revs_limit + 1:
             uniq_id = revs_ids[0]
             html_tmpl = (
                 '<span> %s <a class="show_more" id="_%s" '
                 'href="#more">%s</a> %s</span>'
             )
             if not feed:
                 cs_links.append(html_tmpl % (
                       _('and'),
                       uniq_id, _('%s more') % (len(revs_ids) - revs_limit),
                       _('revisions')
                     )
                 )
 
             if not feed:
                 html_tmpl = '<span id="%s" style="display:none">, %s </span>'
             else:
                 html_tmpl = '<span id="%s"> %s </span>'
 
             morelinks = ', '.join(
               [lnk(rev, repo_name) for rev in revs[revs_limit:]]
             )
 
             if len(revs_ids) > revs_top_limit:
                 morelinks += ', ...'
 
             cs_links.append(html_tmpl % (uniq_id, morelinks))
         if len(revs) > 1:
             cs_links.append(compare_view)
         return ''.join(cs_links)
 
     def get_fork_name():
         repo_name = action_params
         return _('fork name ') + str(link_to(action_params, url('summary_home',
                                           repo_name=repo_name,)))
 
     def get_user_name():
         user_name = action_params
         return user_name
 
     def get_users_group():
         group_name = action_params
         return group_name
 
     def get_pull_request():
         pull_request_id = action_params
         repo_name = user_log.repository.repo_name
         return link_to(_('Pull request #%s') % pull_request_id,
                     url('pullrequest_show', repo_name=repo_name,
                     pull_request_id=pull_request_id))
 
     # action : translated str, callback(extractor), icon
     action_map = {
     'user_deleted_repo':           (_('[deleted] repository'),
                                     None, 'database_delete.png'),
     'user_created_repo':           (_('[created] repository'),
                                     None, 'database_add.png'),
     'user_created_fork':           (_('[created] repository as fork'),
                                     None, 'arrow_divide.png'),
     'user_forked_repo':            (_('[forked] repository'),
                                     get_fork_name, 'arrow_divide.png'),
     'user_updated_repo':           (_('[updated] repository'),
                                     None, 'database_edit.png'),
     'admin_deleted_repo':          (_('[delete] repository'),
                                     None, 'database_delete.png'),
     'admin_created_repo':          (_('[created] repository'),
                                     None, 'database_add.png'),
     'admin_forked_repo':           (_('[forked] repository'),
                                     None, 'arrow_divide.png'),
     'admin_updated_repo':          (_('[updated] repository'),
                                     None, 'database_edit.png'),
     'admin_created_user':          (_('[created] user'),
                                     get_user_name, 'user_add.png'),
     'admin_updated_user':          (_('[updated] user'),
                                     get_user_name, 'user_edit.png'),
     'admin_created_users_group':   (_('[created] users group'),
                                     get_users_group, 'group_add.png'),
     'admin_updated_users_group':   (_('[updated] users group'),
                                     get_users_group, 'group_edit.png'),
     'user_commented_revision':     (_('[commented] on revision in repository'),
                                     get_cs_links, 'comment_add.png'),
     'user_commented_pull_request': (_('[commented] on pull request for'),
                                     get_pull_request, 'comment_add.png'),
     'user_closed_pull_request':    (_('[closed] pull request for'),
                                     get_pull_request, 'tick.png'),
     'push':                        (_('[pushed] into'),
                                     get_cs_links, 'script_add.png'),
     'push_local':                  (_('[committed via RhodeCode] into repository'),
                                     get_cs_links, 'script_edit.png'),
     'push_remote':                 (_('[pulled from remote] into repository'),
                                     get_cs_links, 'connect.png'),
     'pull':                        (_('[pulled] from'),
                                     None, 'down_16.png'),
     'started_following_repo':      (_('[started following] repository'),
                                     None, 'heart_add.png'),
     'stopped_following_repo':      (_('[stopped following] repository'),
                                     None, 'heart_delete.png'),
     }
 
     action_str = action_map.get(action, action)
     if feed:
         action = action_str[0].replace('[', '').replace(']', '')
     else:
         action = action_str[0]\
             .replace('[', '<span class="journal_highlight">')\
             .replace(']', '</span>')
 
     action_params_func = lambda: ""
 
     if callable(action_str[1]):
         action_params_func = action_str[1]
 
     def action_parser_icon():
         action = user_log.action
         action_params = None
         x = action.split(':')
 
         if len(x) > 1:
             action, action_params = x
 
         tmpl = """<img src="%s%s" alt="%s"/>"""
         ico = action_map.get(action, ['', '', ''])[2]
         return literal(tmpl % ((url('/images/icons/')), ico, action))
 
     # returned callbacks we need to call to get
     return [lambda: literal(action), action_params_func, action_parser_icon]
 
 
 
 #==============================================================================
 # PERMS
 #==============================================================================
 from rhodecode.lib.auth import HasPermissionAny, HasPermissionAll, \
 HasRepoPermissionAny, HasRepoPermissionAll
 
 
 #==============================================================================
 # GRAVATAR URL
 #==============================================================================
 
 def gravatar_url(email_address, size=30):
+    if(config['app_conf'].get('alternative_gravatar')):
+        if(str2bool(config['app_conf'].get('alternative_gravatar_hash'))):
+            email_address = hashlib.md5(email_address.lower()).hexdigest()
+        return "%s/%s?s=%s" % (config['app_conf'].get('alternative_gravatar').strip('/'), email_address, size)
     if (not str2bool(config['app_conf'].get('use_gravatar')) or
         not email_address or email_address == '[e-mail]'):
         f = lambda a, l: min(l, key=lambda x: abs(x - a))
         return url("/images/user%s.png" % f(size, [14, 16, 20, 24, 30]))
 
     ssl_enabled = 'https' == request.environ.get('wsgi.url_scheme')
     default = 'identicon'
     baseurl_nossl = "http://www.gravatar.com/avatar/"
     baseurl_ssl = "https://secure.gravatar.com/avatar/"
     baseurl = baseurl_ssl if ssl_enabled else baseurl_nossl
 
     if isinstance(email_address, unicode):
         #hashlib crashes on unicode items
         email_address = safe_str(email_address)
     # construct the url
     gravatar_url = baseurl + hashlib.md5(email_address.lower()).hexdigest() + "?"
     gravatar_url += urllib.urlencode({'d': default, 's': str(size)})
 
     return gravatar_url
 
 
 #==============================================================================
 # REPO PAGER, PAGER FOR REPOSITORY
 #==============================================================================
 class RepoPage(Page):
 
     def __init__(self, collection, page=1, items_per_page=20,
                  item_count=None, url=None, **kwargs):
 
         """Create a "RepoPage" instance. special pager for paging
         repository
         """
         self._url_generator = url
 
         # Safe the kwargs class-wide so they can be used in the pager() method
         self.kwargs = kwargs
 
         # Save a reference to the collection
         self.original_collection = collection
 
         self.collection = collection
 
         # The self.page is the number of the current page.
         # The first page has the number 1!
         try:
             self.page = int(page)  # make it int() if we get it as a string
         except (ValueError, TypeError):
             self.page = 1
 
         self.items_per_page = items_per_page
 
         # Unless the user tells us how many items the collections has
         # we calculate that ourselves.
         if item_count is not None:
             self.item_count = item_count
         else:
             self.item_count = len(self.collection)
 
         # Compute the number of the first and last available page
         if self.item_count > 0:
             self.first_page = 1
             self.page_count = int(math.ceil(float(self.item_count) /
                                             self.items_per_page))
             self.last_page = self.first_page + self.page_count - 1
 
             # Make sure that the requested page number is the range of
             # valid pages
             if self.page > self.last_page:
                 self.page = self.last_page
             elif self.page < self.first_page:
                 self.page = self.first_page
 
             # Note: the number of items on this page can be less than
             #       items_per_page if the last page is not full
             self.first_item = max(0, (self.item_count) - (self.page *
                                                           items_per_page))
             self.last_item = ((self.item_count - 1) - items_per_page *
                               (self.page - 1))
 
             self.items = list(self.collection[self.first_item:self.last_item + 1])
 
             # Links to previous and next page
             if self.page > self.first_page:
                 self.previous_page = self.page - 1
             else:
                 self.previous_page = None
 
             if self.page < self.last_page:
                 self.next_page = self.page + 1
             else:
                 self.next_page = None
 
         # No items available
         else:
             self.first_page = None
             self.page_count = 0
             self.last_page = None
             self.first_item = None
             self.last_item = None
             self.previous_page = None
             self.next_page = None
             self.items = []
 
         # This is a subclass of the 'list' type. Initialise the list now.
         list.__init__(self, reversed(self.items))
 
 
 def changed_tooltip(nodes):
     """
     Generates a html string for changed nodes in changeset page.
     It limits the output to 30 entries
 
     :param nodes: LazyNodesGenerator
     """
     if nodes:
         pref = ': <br/> '
         suf = ''
         if len(nodes) > 30:
             suf = '<br/>' + _(' and %s more') % (len(nodes) - 30)
         return literal(pref + '<br/> '.join([safe_unicode(x.path)
                                              for x in nodes[:30]]) + suf)
     else:
         return ': ' + _('No Files')
 
 
 def repo_link(groups_and_repos):
     """
     Makes a breadcrumbs link to repo within a group
     joins &raquo; on each group to create a fancy link
 
     ex::
         group >> subgroup >> repo
 
     :param groups_and_repos:
     """
     groups, repo_name = groups_and_repos
 
     if not groups:
         return repo_name
     else:
         def make_link(group):
             return link_to(group.name, url('repos_group_home',
                                            group_name=group.group_name))
         return literal(' &raquo; '.join(map(make_link, groups)) + \
                        " &raquo; " + repo_name)
 
 
 def fancy_file_stats(stats):
     """
     Displays a fancy two colored bar for number of added/deleted
     lines of code on file
 
     :param stats: two element list of added/deleted lines of code
     """
 
     a, d, t = stats[0], stats[1], stats[0] + stats[1]
     width = 100
     unit = float(width) / (t or 1)
 
     # needs > 9% of width to be visible or 0 to be hidden
     a_p = max(9, unit * a) if a > 0 else 0
     d_p = max(9, unit * d) if d > 0 else 0
     p_sum = a_p + d_p
 
     if p_sum > width:
         #adjust the percentage to be == 100% since we adjusted to 9
         if a_p > d_p:
             a_p = a_p - (p_sum - width)
         else:
             d_p = d_p - (p_sum - width)
 
     a_v = a if a > 0 else ''
     d_v = d if d > 0 else ''
 
     def cgen(l_type):
         mapping = {'tr': 'top-right-rounded-corner-mid',
                    'tl': 'top-left-rounded-corner-mid',
                    'br': 'bottom-right-rounded-corner-mid',
                    'bl': 'bottom-left-rounded-corner-mid'}
         map_getter = lambda x: mapping[x]
 
         if l_type == 'a' and d_v:
             #case when added and deleted are present
             return ' '.join(map(map_getter, ['tl', 'bl']))
 
         if l_type == 'a' and not d_v:
             return ' '.join(map(map_getter, ['tr', 'br', 'tl', 'bl']))
 
         if l_type == 'd' and a_v:
             return ' '.join(map(map_getter, ['tr', 'br']))
 
         if l_type == 'd' and not a_v:
             return ' '.join(map(map_getter, ['tr', 'br', 'tl', 'bl']))
 
     d_a = '<div class="added %s" style="width:%s%%">%s</div>' % (
         cgen('a'), a_p, a_v
     )
     d_d = '<div class="deleted %s" style="width:%s%%">%s</div>' % (
         cgen('d'), d_p, d_v
     )
     return literal('<div style="width:%spx">%s%s</div>' % (width, d_a, d_d))
 
 
 def urlify_text(text_):
     import re
 
     url_pat = re.compile(r'''(http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]'''
                          '''|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+)''')
 
     def url_func(match_obj):
         url_full = match_obj.groups()[0]
         return '<a href="%(url)s">%(url)s</a>' % ({'url': url_full})
 
     return literal(url_pat.sub(url_func, text_))
 
 
 def urlify_changesets(text_, repository):
     """
     Extract revision ids from changeset and make link from them
 
     :param text_:
     :param repository:
     """
     import re
     URL_PAT = re.compile(r'([0-9a-fA-F]{12,})')
 
     def url_func(match_obj):
         rev = match_obj.groups()[0]
         pref = ''
         if match_obj.group().startswith(' '):
             pref = ' '
         tmpl = (
         '%(pref)s<a class="%(cls)s" href="%(url)s">'
         '%(rev)s'
         '</a>'
         )
         return tmpl % {
          'pref': pref,
          'cls': 'revision-link',
          'url': url('changeset_home', repo_name=repository, revision=rev),
          'rev': rev,
         }
 
     newtext = URL_PAT.sub(url_func, text_)
 
     return newtext
 
 
 def urlify_commit(text_, repository=None, link_=None):
     """
     Parses given text message and makes proper links.
     issues are linked to given issue-server, and rest is a changeset link
     if link_ is given, in other case it's a plain text
 
     :param text_:
     :param repository:
     :param link_: changeset link
     """
     import re
     import traceback
 
     def escaper(string):
         return string.replace('<', '&lt;').replace('>', '&gt;')
 
     def linkify_others(t, l):
         urls = re.compile(r'(\<a.*?\<\/a\>)',)
         links = []
         for e in urls.split(t):
             if not urls.match(e):
                 links.append('<a class="message-link" href="%s">%s</a>' % (l, e))
             else:
                 links.append(e)
 
         return ''.join(links)
 
     # urlify changesets - extrac revisions and make link out of them
     text_ = urlify_changesets(escaper(text_), repository)
 
     try:
         conf = config['app_conf']
 
         URL_PAT = re.compile(r'%s' % conf.get('issue_pat'))
 
         if URL_PAT:
             ISSUE_SERVER_LNK = conf.get('issue_server_link')
             ISSUE_PREFIX = conf.get('issue_prefix')
 
             def url_func(match_obj):
                 pref = ''
                 if match_obj.group().startswith(' '):
                     pref = ' '
 
                 issue_id = ''.join(match_obj.groups())
                 tmpl = (
                 '%(pref)s<a class="%(cls)s" href="%(url)s">'
                 '%(issue-prefix)s%(id-repr)s'
                 '</a>'
                 )
                 url = ISSUE_SERVER_LNK.replace('{id}', issue_id)
                 if repository:
                     url = url.replace('{repo}', repository)
                     repo_name = repository.split(URL_SEP)[-1]
                     url = url.replace('{repo_name}', repo_name)
                 return tmpl % {
                      'pref': pref,
                      'cls': 'issue-tracker-link',
                      'url': url,
                      'id-repr': issue_id,
                      'issue-prefix': ISSUE_PREFIX,
                      'serv': ISSUE_SERVER_LNK,
                 }
 
             newtext = URL_PAT.sub(url_func, text_)
 
             if link_:
                 # wrap not links into final link => link_
                 newtext = linkify_others(newtext, link_)
 
             return literal(newtext)
     except:
         log.error(traceback.format_exc())
         pass
 
     return text_
 
 
 def rst(source):
     return literal('<div class="rst-block">%s</div>' %
                    MarkupRenderer.rst(source))
 
 
 def rst_w_mentions(source):
     """
     Wrapped rst renderer with @mention highlighting
 
     :param source:
     """
     return literal('<div class="rst-block">%s</div>' %
                    MarkupRenderer.rst_with_mentions(source))
 
 
 def changeset_status(repo, revision):
     return ChangesetStatusModel().get_status(repo, revision)
 
 
 def changeset_status_lbl(changeset_status):
     return dict(ChangesetStatus.STATUSES).get(changeset_status)
 
 
 def get_permission_name(key):
     return dict(Permission.PERMS).get(key)