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Correct the documentation for these new classes.

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The old documentation was copy-pasted or didn't exist.

Also, I forgot that tag() doesn't copy a tag, even if as written this
_did_ work for my purposes.
This commit is contained in:
hab 2019-08-14 20:17:11 +01:00
parent 8ce18541c6
commit 258dde98ed
1 changed files with 27 additions and 10 deletions
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37
src/allmydata/web/common.py
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@ -463,12 +463,13 @@ class MultiFormatPage(Page):
class MultiFormatResource(resource.Resource, object):
"""
```MultiFormatPage`` is a ``rend.Page`` that can be rendered in a number
of different formats.
``MultiFormatResource`` is a ``resource.Resource`` that can be rendered in
a number of different formats.
Rendered format is controlled by a query argument (given by
``self.formatArgument``). Different resources may support different
formats but ``json`` is a pretty common one.
formats but ``json`` is a pretty common one. ``html`` is the default
format if nothing else is given as the ``formatDefault``.
"""
formatArgument = "t"
formatDefault = None
@ -479,9 +480,9 @@ class MultiFormatResource(resource.Resource, object):
argument.
A renderer for the format given by the query argument matching
``formatArgument`` will be selected and invoked. The default ``Page``
rendering behavior will be used if no format is selected (either by
query arguments or by ``formatDefault``).
``formatArgument`` will be selected and invoked. render_HTML will be
used as a default if no format is selected (either by query arguments
or by ``formatDefault``).
:return: The result of the selected renderer.
"""
@ -494,11 +495,11 @@ class MultiFormatResource(resource.Resource, object):
"""
Get the renderer for the indicated format.
:param bytes fmt: The format. If a method with a prefix of
:param str fmt: The format. If a method with a prefix of
``render_`` and a suffix of this format (upper-cased) is found, it
will be used.
:return: A callable which takes a Nevow context and renders a
:return: A callable which takes a twisted.web Request and renders a
response.
"""
renderer = None
@ -519,6 +520,22 @@ class MultiFormatResource(resource.Resource, object):
class SlotsSequenceElement(template.Element):
"""
``SlotsSequenceElement` is a minimal port of nevow's sequence renderer
for twisted.web.template.
Tags passed in to be templated will have two renderers available:
- The ``item`` renderer will have its tag cloned for each item in the
sequence provided, and its slots filled from the sequence item. Each
item must be dict-like enough for ``tag.fillSlots(**item)``. Each cloned
tag will be siblings with no separator beween them.
- The ``empty`` renderer will either return its tag unmodified if the
provided sequence has no items, or return the empty string if there are
any items.
"""
def __init__(self, tag, seq):
self.loader = template.TagLoader(tag)
self.seq = seq
@ -526,9 +543,9 @@ class SlotsSequenceElement(template.Element):
@template.renderer
def item(self, request, tag):
for item in self.seq:
yield tag().fillSlots(**item)
@template.renderer
yield tag.clone(deep=False).fillSlots(**item)
@template.renderer
def empty(self, request, tag):
if len(self.seq) > 0:
return ''