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Viewing changes to ivle/webapp/base/xhtml.py

  • Committer: Matt Giuca
  • Date: 2010-02-25 05:00:39 UTC
  • mto: This revision was merged to the branch mainline in revision 1731.
  • Revision ID: matt.giuca@gmail.com-20100225050039-s6b1n33hwwucafql
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ivle/webapp/base/xhtml.py
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import inspect
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import os.path
 
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import urllib
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23
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import genshi.template
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26
from ivle.webapp.media import media_url
 
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from ivle.webapp.core import Plugin as CorePlugin
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from ivle.webapp.base.views import BaseView
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import ivle.conf
27
 
import ivle.util
 
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from ivle.webapp.base.plugins import ViewPlugin, OverlayPlugin
 
30
from ivle.webapp.errors import HTTPError, Unauthorized
 
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from ivle.webapp.publisher import NoPath
 
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from ivle.webapp.breadcrumbs import Breadcrumber
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29
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class XHTMLView(BaseView):
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    """
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    It is expected that apps which use this view will be written using Genshi
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    templates.
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    """
35
 
    def __init__(self, req, **kwargs):
36
 
        for key in kwargs:
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          setattr(self, key, kwargs[key])
 
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    template = 'template.html'
 
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    allow_overlays = True
 
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    breadcrumb_text = None
 
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    _loader = None
 
45
 
 
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    def __init__(self, *args, **kwargs):
 
47
        super(XHTMLView, self).__init__(*args, **kwargs)
 
48
 
 
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        # We use a single loader for all views, so we can cache the
 
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        # parsed templates. auto_reload is convenient and has a minimal
 
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        # performance penalty, so we'll leave it on.
 
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        if self.__class__._loader is None:
 
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            self.__class__._loader = genshi.template.TemplateLoader(
 
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                ".", auto_reload=True,
 
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                max_cache_size=100)
 
56
 
 
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        self.overlay_blacklist = []
 
58
 
 
59
        self.plugin_scripts = {}
 
60
        self.plugin_styles = {}
 
61
        self.scripts_init = []
 
62
 
 
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        self.extra_breadcrumbs = []
 
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        self.overlay_blacklist = []
 
65
 
 
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    def get_context_ancestry(self, req):
 
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        return req.publisher.get_ancestors(self.context)
 
68
 
 
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    def filter(self, stream, ctx):
 
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        return stream
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71
 
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    def render(self, req):
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        req.content_type = 'text/html' # TODO: Detect application/xhtml+xml
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        # view.
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        app_template = os.path.join(os.path.dirname(
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                        inspect.getmodule(self).__file__), self.template) 
50
 
        req.write_html_head_foot = False
51
 
        loader = genshi.template.TemplateLoader(".", auto_reload=True)
52
 
        tmpl = loader.load(app_template)
53
 
        app = tmpl.generate(viewctx)
 
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        tmpl = self._loader.load(app_template)
 
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        app = self.filter(tmpl.generate(viewctx), viewctx)
 
85
 
 
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        view_scripts = []
 
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        for plugin in self.plugin_scripts:
 
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            for path in self.plugin_scripts[plugin]:
 
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                view_scripts.append(media_url(req, plugin, path))
 
90
 
 
91
        view_styles = []
 
92
        for plugin in self.plugin_styles:
 
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            for path in self.plugin_styles[plugin]:
 
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                view_styles.append(media_url(req, plugin, path))
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        # Global template
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        ctx = genshi.template.Context()
57
 
        ctx['app_styles'] = req.styles
58
 
        ctx['scripts'] = req.scripts
59
 
        ctx['scripts_init'] = req.scripts_init
 
98
 
 
99
        overlay_bits = self.render_overlays(req) if req.user else [[]]*4
 
100
        ctx['overlays'] = overlay_bits[0]
 
101
 
 
102
        ctx['styles'] = [media_url(req, CorePlugin, 'ivle.css')]
 
103
        ctx['styles'] += view_styles
 
104
        ctx['styles'] += overlay_bits[1]
 
105
 
 
106
        ctx['scripts'] = [media_url(req, CorePlugin, path) for path in
 
107
                           ('util.js', 'json2.js', 'md5.js')]
 
108
        ctx['scripts'].append(media_url(req, '+external/jquery', 'jquery.js'))
 
109
        ctx['scripts'] += view_scripts
 
110
        ctx['scripts'] += overlay_bits[2]
 
111
 
 
112
        ctx['scripts_init'] = self.scripts_init + overlay_bits[3]
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        ctx['app_template'] = app
 
114
        ctx['title_img'] = media_url(req, CorePlugin,
 
115
                                     "images/chrome/root-breadcrumb.png")
 
116
        try:
 
117
            ancestry = self.get_context_ancestry(req)
 
118
        except NoPath:
 
119
            ancestry = []
 
120
 
 
121
        crumber = Breadcrumber(req)
 
122
 
 
123
        ctx['breadcrumbs'] = []
 
124
        if not req.publicmode:
 
125
            for ancestor in ancestry:
 
126
                crumb = crumber.crumb(ancestor)
 
127
                if crumb is None:
 
128
                    continue
 
129
 
 
130
                if hasattr(crumb, 'extra_breadcrumbs_before'):
 
131
                    ctx['breadcrumbs'].extend(crumb.extra_breadcrumbs_before)
 
132
                ctx['breadcrumbs'].append(crumb)
 
133
                if hasattr(crumb, 'extra_breadcrumbs_after'):
 
134
                    ctx['breadcrumbs'].extend(crumb.extra_breadcrumbs_after)
 
135
 
 
136
            # If the view has specified text for a breadcrumb, add one.
 
137
            if self.breadcrumb_text:
 
138
                ctx['breadcrumbs'].append(ViewBreadcrumb(req, self))
 
139
 
 
140
            # Allow the view to add its own fake breadcrumbs.
 
141
            ctx['breadcrumbs'].extend(self.extra_breadcrumbs)
 
142
 
61
143
        self.populate_headings(req, ctx)
62
 
        tmpl = loader.load(os.path.join(os.path.dirname(__file__), 
 
144
        tmpl = self._loader.load(os.path.join(os.path.dirname(__file__), 
63
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                                                        'ivle-headings.html'))
64
146
        req.write(tmpl.generate(ctx).render('xhtml', doctype='xhtml'))
 
147
        
 
148
    def populate(self, req, ctx):
 
149
        raise NotImplementedError()
65
150
 
66
151
    def populate_headings(self, req, ctx):
67
152
        ctx['favicon'] = None
68
 
        ctx['root_dir'] = ivle.conf.root_dir
69
 
        ctx['public_host'] = ivle.conf.public_host
 
153
        ctx['root_dir'] = req.config['urls']['root']
 
154
        ctx['public_host'] = req.config['urls']['public_host']
 
155
        ctx['svn_base'] = req.config['urls']['svn_addr']
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156
        ctx['write_javascript_settings'] = req.write_javascript_settings
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        if req.user:
72
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            ctx['login'] = req.user.login
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            ctx['nick'] = req.user.nick
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        else:
76
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            ctx['login'] = None
 
163
            ctx['logged_in'] = False
77
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        ctx['publicmode'] = req.publicmode
 
165
        if hasattr(self, 'help'):
 
166
            ctx['help_path'] = self.help
 
167
 
78
168
        ctx['apps_in_tabs'] = []
79
 
        for urlname in ivle.conf.apps.apps_in_tabs:
80
 
            new_app = {}
81
 
            app = ivle.conf.apps.app_url[urlname]
82
 
            new_app['this_app'] = hasattr(self, 'appname') \
83
 
                                  and urlname == self.appname
84
 
            if app.icon:
85
 
                new_app['has_icon'] = True
86
 
                icon_dir = ivle.conf.apps.app_icon_dir
87
 
                icon_url = ivle.util.make_path(os.path.join(icon_dir, app.icon))
88
 
                new_app['icon_url'] = icon_url
89
 
                if new_app['this_app']:
90
 
                    ctx['favicon'] = icon_url
 
169
        for plugin in req.config.plugin_index[ViewPlugin]:
 
170
            if not hasattr(plugin, 'tabs'):
 
171
                continue
 
172
 
 
173
            for tab in plugin.tabs:
 
174
                # tab is a tuple: name, title, desc, icon, path, weight, admin
 
175
                # (Admin is optional, defaults to false)
 
176
                new_app = {}
 
177
                new_app['this_app'] = hasattr(self, 'tab') \
 
178
                                      and tab[0] == self.tab
 
179
 
 
180
                # Icon name
 
181
                if tab[3] is not None:
 
182
                    new_app['has_icon'] = True
 
183
                    icon_url = media_url(req, plugin, tab[3])
 
184
                    new_app['icon_url'] = icon_url
 
185
                    if new_app['this_app']:
 
186
                        ctx['favicon'] = icon_url
 
187
                else:
 
188
                    new_app['has_icon'] = False
 
189
                # The following check is here, so it is AFTER setting the
 
190
                # icon, but BEFORE actually installing the tab in the menu
 
191
                if len(tab) > 6 and tab[6]:
 
192
                    # Admin-only tab
 
193
                    if not (req.user and req.user.admin):
 
194
                        break
 
195
                new_app['path'] = req.make_path(tab[4])
 
196
                new_app['desc'] = tab[2]
 
197
                new_app['name'] = tab[1]
 
198
                new_app['weight'] = tab[5]
 
199
                ctx['apps_in_tabs'].append(new_app)
 
200
 
 
201
        ctx['apps_in_tabs'].sort(key=lambda tab: tab['weight'])
 
202
 
 
203
    def render_overlays(self, req):
 
204
        """Generate XML streams for the overlays.
 
205
        
 
206
        Returns a list of streams. Populates the scripts, styles, and 
 
207
        scripts_init.
 
208
        """
 
209
        overlays = []
 
210
        styles = []
 
211
        scripts = []
 
212
        scripts_init = []
 
213
        if not self.allow_overlays:
 
214
            return (overlays, styles, scripts, scripts_init)
 
215
 
 
216
        for plugin in req.config.plugin_index[OverlayPlugin]:
 
217
            for overclass in plugin.overlays:
 
218
                if overclass in self.overlay_blacklist:
 
219
                    continue
 
220
                overlay = overclass(req)
 
221
                #TODO: Re-factor this to look nicer
 
222
                for mplugin in overlay.plugin_scripts:
 
223
                    for path in overlay.plugin_scripts[mplugin]:
 
224
                        scripts.append(media_url(req, mplugin, path))
 
225
 
 
226
                for mplugin in overlay.plugin_styles:
 
227
                    for path in overlay.plugin_styles[mplugin]:
 
228
                        styles.append(media_url(req, mplugin, path))
 
229
 
 
230
                scripts_init += overlay.plugin_scripts_init
 
231
 
 
232
                overlays.append(overlay.render(req))
 
233
        return (overlays, styles, scripts, scripts_init)
 
234
 
 
235
    @classmethod
 
236
    def get_error_view(cls, e):
 
237
        view_map = {HTTPError:    XHTMLErrorView,
 
238
                    Unauthorized: XHTMLUnauthorizedView}
 
239
        for exccls in inspect.getmro(type(e)):
 
240
            if exccls in view_map:
 
241
                return view_map[exccls]
 
242
 
 
243
class XHTMLErrorView(XHTMLView):
 
244
    template = 'xhtmlerror.html'
 
245
 
 
246
    def __init__(self, req, context, lastobj):
 
247
        super(XHTMLErrorView, self).__init__(req, context)
 
248
        self.lastobj = lastobj
 
249
 
 
250
    def get_context_ancestry(self, req):
 
251
        return req.publisher.get_ancestors(self.lastobj)
 
252
 
 
253
    def populate(self, req, ctx):
 
254
        ctx['req'] = req
 
255
        ctx['exception'] = self.context
 
256
        req.headers_out['X-IVLE-Error'] = self.context.message
 
257
 
 
258
class XHTMLUnauthorizedView(XHTMLErrorView):
 
259
    template = 'xhtmlunauthorized.html'
 
260
 
 
261
    def __init__(self, req, exception, lastobj):
 
262
        super(XHTMLUnauthorizedView, self).__init__(req, exception, lastobj)
 
263
 
 
264
        if not req.publicmode and req.user is None:
 
265
            # Not logged in. Redirect to login page.
 
266
            if req.uri == '/':
 
267
                query_string = ''
91
268
            else:
92
 
                new_app['has_icon'] = False
93
 
            new_app['path'] = ivle.util.make_path(urlname)
94
 
            new_app['desc'] = app.desc
95
 
            new_app['name'] = app.name
96
 
            ctx['apps_in_tabs'].append(new_app)
 
269
                query_string = '?url=' + urllib.quote(req.uri, safe="/~")
 
270
            req.throw_redirect('/+login' + query_string)
 
271
 
 
272
        req.status = 403
 
273
 
 
274
class ViewBreadcrumb(object):
 
275
    def __init__(self, req, context):
 
276
        self.req = req
 
277
        self.context = context
 
278
 
 
279
    @property
 
280
    def text(self):
 
281
        return self.context.breadcrumb_text