diff options
Diffstat (limited to 'forum/templatetags/extra_tags.py')
| -rwxr-xr-x | forum/templatetags/extra_tags.py | 77 |
1 files changed, 71 insertions, 6 deletions
diff --git a/forum/templatetags/extra_tags.py b/forum/templatetags/extra_tags.py index 382d19f0..83aeb4c7 100755 --- a/forum/templatetags/extra_tags.py +++ b/forum/templatetags/extra_tags.py @@ -304,8 +304,12 @@ class ItemSeparatorNode(template.Node): return self.content class JoinItemListNode(template.Node): - def __init__(self,separator=ItemSeparatorNode("''"), items=()): + def __init__(self,separator=ItemSeparatorNode("''"), last_separator=None, items=()): self.separator = separator + if last_separator: + self.last_separator = last_separator + else: + self.last_separator = separator self.items = items def render(self,context): out = [] @@ -314,16 +318,34 @@ class JoinItemListNode(template.Node): bit = item.render(context) if not empty_re.search(bit): out.append(bit) - return self.separator.render(context).join(out) + if len(out) == 1: + return out[0] + if len(out) > 1: + last = out.pop() + all_but_last = self.separator.render(context).join(out) + return self.last_separator.render(context).join((all_but_last,last)) + else: + assert(len(out)==0) + return '' @register.tag(name="joinitems") def joinitems(parser,token): try: - tagname,junk,sep_token = token.split_contents() - except ValueError: - raise template.TemplateSyntaxError("joinitems tag requires 'using \"separator html\"' parameters") + tagname, junk, sep_token = token.split_contents() + last_sep_token = None + except: + try: + tagname, junk, sep_token, last_sep_token = token.split_contents() + except: + raise template.TemplateSyntaxError('incorrect usage of joinitems tag first param ' + 'must be \'using\' second - separator and ' + 'optional third - last item separator') if junk == 'using': sep_node = ItemSeparatorNode(sep_token) + if last_sep_token: + last_sep_node = ItemSeparatorNode(last_sep_token) + else: + last_sep_node = None else: raise template.TemplateSyntaxError("joinitems tag requires 'using \"separator html\"' parameters") nodelist = [] @@ -333,7 +355,7 @@ def joinitems(parser,token): if next.contents == 'endjoinitems': break - return JoinItemListNode(separator=sep_node,items=nodelist) + return JoinItemListNode(separator=sep_node,last_separator=last_sep_node,items=nodelist) class BlockMediaUrlNode(template.Node): def __init__(self,nodelist): @@ -436,3 +458,46 @@ def question_counter_widget(question): #returns a dictionary with keys like 'votes_bg', etc return locals() +class IsManyNode(template.Node): + def __init__(self, test_items, true_nodelist, false_nodelist): + self.true_nodelist = true_nodelist + self.false_nodelist = false_nodelist + self.test_items = test_items + def render(self, context): + maybe = False + for item in self.test_items: + is_good = item.resolve(context) + if maybe == True and is_good: + return self.true_nodelist.render(context) + if is_good: + maybe = True + return self.false_nodelist.render(context) + +@register.tag(name='ifmany') +def ifmany(parser,token): + """usage {% ifmany item1 item2 item3 ... itemN %} stuff {% endifmany %} + returns content included into the tag if more than one + item evaluates to Tru'ish value - that's the idea + {% else %} is not supported yet + """ + + bits = list(token.split_contents()) + start_tag = bits.pop(0) + + test_items = [] + for bit in bits: + item = parser.compile_filter(bit) + test_items.append(item) + + end_tag = 'end' + start_tag + else_tag = 'else' + true_nodelist = parser.parse((end_tag,else_tag,)) + token = parser.next_token() + if token.contents == else_tag: + false_nodelist = parser.parse((end_tag,)) + token = parser.next_token() + else: + false_nodelist = template.NodeList() + + + return IsManyNode(test_items, true_nodelist, false_nodelist) |