I have no idea if this is the right place to post such a thing, but
in an effort to give something back to the community, I would like to
post a template tag I developed:
Comments are appreciated,
Thanks,
Corey
--------------------------------------------------
"Tags used by the reservation app"
from django import template
register = template.Library()
def columnize(parser, token):
"""
Put stuff into columns. Can also define class tags for rows
and cells
Usage: {% columnize num_cols [row_class
[,row_class2...]|'' [cell_class[,cell_class2]]] %}
num_cols: the number of columns to format.
row_class: can a comma (no spaces, please) separated list
that cycles (utilizing the cycle code)
can also put in '' for nothing, if you want no
row_class, but want a cell_class.
cell_class: same format as row_class, but the cells only
loop within a row. Every row resets the
cell counter.
Typical usage:
<table border="0" cellspacing="5" cellpadding="5">
{% for o in some_list %}
{% columnize 3 %}
<a href="{{ o.get_absolute_url }}">{{ o.name }}</a>
{% endcolumnize %}
{% endfor %}
</table>
"""
nodelist = parser.parse(('endcolumnize',))
parser.delete_first_token()
#Get the number of columns, default 1
columns = 1
row_class = ''
cell_class = ''
args = token.contents.split(None, 3)
num_args = len(args)
if num_args >= 2:
#{% columnize columns %}
if args[1].isdigit():
columns = int(args[1])
else:
raise template.TemplateSyntaxError('The number of
columns must be a number. "%s" is not a number.') % args[2]
if num_args >= 3:
#{% columnize columns row_class %}
if "," in args[2]:
#{% columnize columns row1,row2,row3 %}
row_class = [v for v in args[2].split(",") if v] #
split and kill blanks
else:
row_class = [args[2]]
if row_class == "''":
# Allow the designer to pass an empty string (two
quotes) to skip the row_class and
# only have a cell_class
row_class = []
if num_args == 4:
#{% columnize columns row_class cell_class %}
if "," in args[3]:
#{% columnize row_class cell1,cell2,cell3 %}
cell_class = [v for v in args[3].split(",") if v] #
split and kill blanks
else:
cell_class = [args[3]]
if cell_class == "''":
# This shouldn't be necessary, but might as well
test for it
cell_class = []
return ColumnizeNode(nodelist, columns, row_class, cell_class)
class ColumnizeNode(template.Node):
def __init__(self, nodelist, columns = 1, row_class = '',
cell_class = ''):
self.nodelist = nodelist
self.columns = int(columns)
self.counter = 0
self.rowcounter = -1
self.cellcounter = -1
self.row_class_len = len(row_class)
self.row_class = row_class
self.cell_class_len = len(cell_class)
self.cell_class = cell_class
def render(self, context):
output = ''
self.counter += 1
if (self.counter > self.columns):
self.counter = 1
self.cellcounter = -1
if (self.counter == 1):
output = '<tr'
if self.row_class:
self.rowcounter += 1
output += ' class="%s">' % self.row_class
[self.rowcounter % self.row_class_len]
else:
output += '>'
output += '<td'
if self.cell_class:
self.cellcounter += 1
output += ' class="%s">' % self.cell_class
[self.cellcounter % self.cell_class_len]
else:
output += '>'
output += self.nodelist.render(context) + '</td>'
if (self.counter == self.columns):
output += '</tr>'
return output
register.tag('columnize', columnize)
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