1 files changed, 114 insertions, 0 deletions
diff --git a/mediagoblin/tools/template.py b/mediagoblin/tools/template.py
new file mode 100644
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+++ b/mediagoblin/tools/template.py
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+# GNU MediaGoblin -- federated, autonomous media hosting
+# Copyright (C) 2011 MediaGoblin contributors.  See AUTHORS.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from math import ceil
+import jinja2
+from babel.localedata import exists
+from babel.support import LazyProxy
+from mediagoblin import mg_globals
+from mediagoblin import messages
+from mediagoblin.tools import common
+from mediagoblin.tools.translate import setup_gettext
+
+SETUP_JINJA_ENVS = {}
+
+def get_jinja_env(template_loader, locale):
+    """
+    Set up the Jinja environment, 
+
+    (In the future we may have another system for providing theming;
+    for now this is good enough.)
+    """
+    setup_gettext(locale)
+
+    # If we have a jinja environment set up with this locale, just
+    # return that one.
+    if SETUP_JINJA_ENVS.has_key(locale):
+        return SETUP_JINJA_ENVS[locale]
+
+    template_env = jinja2.Environment(
+        loader=template_loader, autoescape=True,
+        extensions=['jinja2.ext.i18n', 'jinja2.ext.autoescape'])
+
+    template_env.install_gettext_callables(
+        mg_globals.translations.ugettext,
+        mg_globals.translations.ungettext)
+
+    # All templates will know how to ...
+    # ... fetch all waiting messages and remove them from the queue
+    # ... construct a grid of thumbnails or other media
+    template_env.globals['fetch_messages'] = messages.fetch_messages
+    template_env.globals['gridify_list'] = gridify_list
+    template_env.globals['gridify_cursor'] = gridify_cursor
+
+    if exists(locale):
+        SETUP_JINJA_ENVS[locale] = template_env
+
+    return template_env
+
+# We'll store context information here when doing unit tests
+TEMPLATE_TEST_CONTEXT = {}
+
+
+def render_template(request, template_path, context):
+    """
+    Render a template with context.
+
+    Always inserts the request into the context, so you don't have to.
+    Also stores the context if we're doing unit tests.  Helpful!
+    """
+    template = request.template_env.get_template(
+        template_path)
+    context['request'] = request
+    rendered = template.render(context)
+    
+    if common.TESTS_ENABLED:        
+        TEMPLATE_TEST_CONTEXT[template_path] = context
+
+    return rendered
+
+
+def clear_test_template_context():
+    global TEMPLATE_TEST_CONTEXT
+    TEMPLATE_TEST_CONTEXT = {}
+
+def gridify_list(this_list, num_cols=5):
+    """
+    Generates a list of lists where each sub-list's length depends on
+    the number of columns in the list
+    """
+    grid = []
+
+    # Figure out how many rows we should have
+    num_rows = int(ceil(float(len(this_list)) / num_cols))
+
+    for row_num in range(num_rows):
+        slice_min = row_num * num_cols
+        slice_max = (row_num + 1) * num_cols
+
+        row = this_list[slice_min:slice_max]
+
+        grid.append(row)
+
+    return grid
+
+
+def gridify_cursor(this_cursor, num_cols=5):
+    """
+    Generates a list of lists where each sub-list's length depends on
+    the number of columns in the list
+    """
+    return gridify_list(list(this_cursor), num_cols)