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The adapter mechanism is not specific to the use of views. Moving the
class the cubicweb.entity makes this clearer.

This is not compatible with python3.5

Closes #17219704

This mostly consists in removing the dependency on "six" and updating
the code to use only Python3 idioms.

Notice that we previously used TemporaryDirectory from
cubicweb.devtools.testlib for compatibility with Python2. We now
directly import it from tempfile.

As in previous changesets, most code has been deprecated since a very
long time. This changeset concerns "core" cubicweb modules
(e.g. "server", "appobjects") for which it's not easy to handle change
atomically.

In cubicweb/server/querier.py, we adjust empty_rset() function as a
result of "rqlst" argument of ResultSet being dropped. (There was no use
of the keyword argument anyways.)

* update some copyright
* drop most __docformat__ declaration
* fix some flake8 warnings / errors

Basically:

mkdir cubicweb
hg mv *.py -X setup.py cubicweb
hg mv dataimport devtools entities etwist ext hooks i18n misc schemas server skeleton sobjects test web wsgi cubicweb

Other changes:

* adjust path to cubicweb-ctl in devtools tests
* update setup.py to avoid importing __pkginfo__ (exec it instead),
  replace os.path.walk by os.walk and prepend `modname` here and there
* update tox.ini to account for new test locations
* update doc/conf.py so that it still finds __pkginfo__.py and CWDIR in
  doc/Makefile

Get rid of extra space before `!' and `?'

In cw 3.9, interfaces are deprecated and replaced with adapters,
yielding a lot of bw compat in many places -- most if this patch is
concerned with the interface bw compat

- cwvreg: interface cleanup

- doc/adapters.rst: interface cleanup

- entities/adapters.py, wfobjs.py: interfaces bw compat

- entity.py: interfaces bw compat, also get_value, delete,
  attr_metadata, has_perm, set_related_cache, clear_related_cache,
  clear_related_cache, related_rql

- predicates.py: score_interfaces & implements

- interfaces.py & mixins.py: 100% gone

- view.py: implement_adapter_compat, unwrap_adapter_compat

- calendar.py, editcontroller.py, ibreadcrumbs.py, navigation.py, xmlrss.py:
  interface bw compat

- treeview.py: salvage one function from mixins.py


Related to #2782004.

We dropped xhtml support in 3.17 but we kept providing documents using the
XHTML strict doctype, while our content wasn't conform to the DTD since we
dropped proper namespaces definition as well as declaration of cubicweb DTD
extensions.

* HTMLStream does not care about xml any more

* reqquest.demote_to_html and .xhtml_browser are deprecated

* web config: drop force-html-content-type option

* adjust tests

Related to #3799117.

The boxes and entityvcomponent objects cannot really be removed as they
are still used throughout the code base (and possible cubes).

This may be caused by a non-working deprecation and needs some more
work.

Nothing seems to ever call user_callback on the Component, only on the
request.  Related to #3567793

* introduce a new 'uicfg' registry (storing instances)

* use the relevant new APIs from lgc.registry to manage the new
  registrable uicfg objects

* cw event manager useage is gone; instead thze standard registry
  reloading mechanism is used

* ensure i18n commands still work (devctl)

* introduce dynamic uicfgs use whenever possible (various views), even
  though sometimes the classic 'static' usage remains

--HG--
branch : stable

A new logilab.common.registry module has been created with content from

* cw.vreg (the whole things that was in there)
* cw.appobject (base selectors and all).

In the process, we've done some renaming:

* former selector functions are now known as "predicate", though you still
  use predicates to build an object'selector

* hence `objectify_selector` decorator is now `objectify_predicate`

* the top level registry is now `RegistryStore` (was `VRegistry`)

Also there is no more need for the @lltrace decorator.

On the CubicWeb side, the `selectors` module has been renamed to `predicates`.

There should be full backward compat with proper deprecation warnings.

[base views] make it easier to override EntityStartupView behaviour when the rset is empty; closes #2126364

--HG--
branch : stable

--HG--
branch : stable

--HG--
branch : stable

notice drop of the .paginable property necessary for 'paginable' affectation as done in the
forthcoming table views refactoring

--HG--
branch : stable

We drop the 'label_column_%s' % colidx pattern and add a clean column_label
method that might be overwritten by children class to alter the way default
columns headers are computed.

--HG--
branch : stable

--HG--
branch : stable

--HG--
branch : stable

--HG--
branch : stable

[view] ability to define a column header through custom label_column_<colindex> method, useful for table view to customize a specific column without specifying others

--HG--
branch : stable

--HG--
branch : stable

* give view init args when selecting row view
* optimize by avoiding re-selection on rset of size 1

--HG--
branch : stable

--HG--
branch : stable

[adapters] fix #1424467 caused by precedence of bw compat method while the adapter is concret for a given class

--HG--
branch : stable

[html generation] even when doctype without extension are asked, we should define the xmlns:cubicweb attribute to avoid html validation error during tests (break tests with new calendar view in default branch since it demote to html)

--HG--
branch : stable

extra ]> appears in the browser. We need to fix the validator instead.

--HG--
branch : stable

* separate box content generation from its layout
* refactor css classes to allow moving boxes and still get consistent ui

On the way to contentnavigation/boxes unification (in a later patch)
* * *
some fixes for the previous (default_new_boxes_system) patch
* * *
some fixes for the previous (default_new_boxes_system) patch

--HG--
branch : stable