1
# IVLE - Informatics Virtual Learning Environment
2
# Copyright (C) 2007-2009 The University of Melbourne
4
# This program is free software; you can redistribute it and/or modify
5
# it under the terms of the GNU General Public License as published by
6
# the Free Software Foundation; either version 2 of the License, or
7
# (at your option) any later version.
9
# This program is distributed in the hope that it will be useful,
10
# but WITHOUT ANY WARRANTY; without even the implied warranty of
11
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12
# GNU General Public License for more details.
14
# You should have received a copy of the GNU General Public License
15
# along with this program; if not, write to the Free Software
16
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
# Author: Nick Chadwick
24
import genshi.template
26
from ivle.webapp.media import media_url
27
from ivle.webapp.core import Plugin as CorePlugin
28
from ivle.webapp.base.views import BaseView
29
from ivle.webapp.base.plugins import ViewPlugin, OverlayPlugin
30
from ivle.webapp.errors import HTTPError, Unauthorized
32
class XHTMLView(BaseView):
34
A view which provides a base class for views which need to return XHTML
35
It is expected that apps which use this view will be written using Genshi
39
template = 'template.html'
46
overlay_blacklist = []
48
def filter(self, stream, ctx):
51
def render(self, req):
52
req.content_type = 'text/html' # TODO: Detect application/xhtml+xml
55
viewctx = genshi.template.Context()
56
self.populate(req, viewctx)
58
# The template is found in the directory of the module containing the
60
app_template = os.path.join(os.path.dirname(
61
inspect.getmodule(self).__file__), self.template)
62
loader = genshi.template.TemplateLoader(".", auto_reload=True)
63
tmpl = loader.load(app_template)
64
app = self.filter(tmpl.generate(viewctx), viewctx)
67
for plugin in self.plugin_scripts:
68
for path in self.plugin_scripts[plugin]:
69
view_scripts.append(media_url(req, plugin, path))
72
for plugin in self.plugin_styles:
73
for path in self.plugin_styles[plugin]:
74
view_styles.append(media_url(req, plugin, path))
77
ctx = genshi.template.Context()
79
overlay_bits = self.render_overlays(req) if req.user else [[]]*4
80
ctx['overlays'] = overlay_bits[0]
82
ctx['styles'] = [media_url(req, CorePlugin, 'ivle.css')]
83
ctx['styles'] += view_styles
84
ctx['styles'] += overlay_bits[1]
86
ctx['scripts'] = [media_url(req, CorePlugin, path) for path in
87
('util.js', 'json2.js', 'md5.js')]
88
ctx['scripts'].append(media_url(req, '+external/jquery', 'jquery.js'))
89
ctx['scripts'] += view_scripts
90
ctx['scripts'] += overlay_bits[2]
92
ctx['scripts_init'] = self.scripts_init + overlay_bits[3]
93
ctx['app_template'] = app
94
ctx['title_img'] = media_url(req, CorePlugin,
95
"images/chrome/title.png")
96
self.populate_headings(req, ctx)
97
tmpl = loader.load(os.path.join(os.path.dirname(__file__),
98
'ivle-headings.html'))
99
req.write(tmpl.generate(ctx).render('xhtml', doctype='xhtml'))
101
def populate(self, req, ctx):
102
raise NotImplementedError()
104
def populate_headings(self, req, ctx):
105
ctx['favicon'] = None
106
ctx['root_dir'] = req.config['urls']['root']
107
ctx['public_host'] = req.config['urls']['public_host']
108
ctx['svn_base'] = req.config['urls']['svn_addr']
109
ctx['write_javascript_settings'] = req.write_javascript_settings
111
ctx['login'] = req.user.login
112
ctx['logged_in'] = True
113
ctx['nick'] = req.user.nick
116
ctx['logged_in'] = False
117
ctx['publicmode'] = req.publicmode
118
if hasattr(self, 'help'):
119
ctx['help_path'] = self.help
121
ctx['apps_in_tabs'] = []
122
for plugin in req.config.plugin_index[ViewPlugin]:
123
if not hasattr(plugin, 'tabs'):
126
for tab in plugin.tabs:
127
# tab is a tuple: name, title, desc, icon, path
129
new_app['this_app'] = hasattr(self, 'tab') \
130
and tab[0] == self.tab
133
if tab[3] is not None:
134
new_app['has_icon'] = True
135
icon_url = media_url(req, plugin, tab[3])
136
new_app['icon_url'] = icon_url
137
if new_app['this_app']:
138
ctx['favicon'] = icon_url
140
new_app['has_icon'] = False
141
new_app['path'] = req.make_path(tab[4])
142
new_app['desc'] = tab[2]
143
new_app['name'] = tab[1]
144
new_app['weight'] = tab[5]
145
ctx['apps_in_tabs'].append(new_app)
147
ctx['apps_in_tabs'].sort(key=lambda tab: tab['weight'])
149
def render_overlays(self, req):
150
"""Generate XML streams for the overlays.
152
Returns a list of streams. Populates the scripts, styles, and
159
if not self.allow_overlays:
160
return (overlays, styles, scripts, scripts_init)
162
for plugin in req.config.plugin_index[OverlayPlugin]:
163
for overclass in plugin.overlays:
164
if overclass in self.overlay_blacklist:
166
overlay = overclass(req)
167
#TODO: Re-factor this to look nicer
168
for mplugin in overlay.plugin_scripts:
169
for path in overlay.plugin_scripts[mplugin]:
170
scripts.append(media_url(req, mplugin, path))
172
for mplugin in overlay.plugin_styles:
173
for path in overlay.plugin_styles[mplugin]:
174
styles.append(media_url(req, mplugin, path))
176
scripts_init += overlay.plugin_scripts_init
178
overlays.append(overlay.render(req))
179
return (overlays, styles, scripts, scripts_init)
182
def get_error_view(cls, e):
183
view_map = {HTTPError: XHTMLErrorView,
184
Unauthorized: XHTMLUnauthorizedView}
185
for exccls in inspect.getmro(type(e)):
186
if exccls in view_map:
187
return view_map[exccls]
189
class XHTMLErrorView(XHTMLView):
190
template = 'xhtmlerror.html'
192
def populate(self, req, ctx):
194
ctx['exception'] = self.context
196
class XHTMLUnauthorizedView(XHTMLErrorView):
197
template = 'xhtmlunauthorized.html'
199
def __init__(self, req, exception):
200
super(XHTMLUnauthorizedView, self).__init__(req, exception)
203
# Not logged in. Redirect to login page.
207
query_string = '?url=' + urllib.quote(req.uri, safe="/~")
208
req.throw_redirect('/+login' + query_string)