To aid moving towards a MainMenu component we must first make subcomponents
for the language alert and opt-out link (which share code which
I've captured in VectorComponentMainMenuAction)
Code is lifted into SkinVector22 to allow us to easily make the template
change without any breaking visual changes
Bug: T319349
Bug: T322089
Change-Id: Ibb69d029a9fb6cee3482e15a60a7358361bd2405
Making this a feature part of the feature management system is integral
to making this a toggle and will allow us to explore making this
persistent in future.
Bug: T319447
Bug: T319449
Change-Id: I80c7b892a6891094854b4154db90917b67986102
To avoid array query values to be used, see warning there:
"Array values are discarded for security reasons. Use {@see getArray} or
{@see getIntArray}."
This also fix that the falsy value "0" is checked against the regex
Bug: T321267
Change-Id: I29bc4a9a7fef5a6cadc0c6aa9fa1f4a03ccf9705
This allows the URL to the other wiki's rest.php to be configured
exactly, rather than assuming that it has the same wgScriptPath as the
current wiki. This is necessary to make this feature work on PatchDemo,
where wgScriptPath looks like '/123abc456/w'.
$wgVectorSearchHost is removed, since nothing uses it except PatchDemo
(where it's broken) and development setups.
Bug: T319494
Change-Id: Ife042f4f683d366a31a642723746d4aa80774c03
* Ensure addPortletLink hook is only run once
* Mark more menu as not supporting icons so icons are not added
Bug: T317491
Bug: T318495
Change-Id: I99450a5b0410e88cc7cdb2753b9b4256e3fe41db
Can be tested by appending ?vectorvisualenhancementnext=1
to URL
Bug: T310838
Bug: T234990
Bug: T234550
Depends-On: I76d0d94c9006cc5f5680849ecdd1c382c16e34ba
Depends-On: Ib7c3021db014827b4b88cac855afc0b54a360f8c
Change-Id: Ie2ffa5c3ecf270c1bb1f315937023ae7ace5ed30
* Updated usages to use SkinTemplateNavigation::Universal
in preparation for the hard deprecation and removal of the hook.
Bug: T310017
Change-Id: I133c7479da294c0b8c908ad8d34690297f08200b
- Make 'updateMenuItem' generic, rename to 'updateItemData'
- Make 'appendListItemClass' generic, rename to 'appendClassToItem'
- Remove 'appendClassToListItem' and replace with 'appendClassToItem'
- Create 'updateMenuItemData', 'updateLinkData', and 'updateDropdownMenuData' wrapper functions to be used in Hooks and SkinVector
- Add and update tests
Bug: T307901
Change-Id: I4b12a0c1aab1224d2658bad30ee629f7266c5b7e
Removes the .mw-ui-button styles from the userpage link
and create account link in the user menu.
Overrides the userpage redlink style so that the link
remains blue even if the userpage doesn't exist.
Visual changes: userpage link and create account link
in header are no longer .mw-ui-buttton styles, but
look like standard blue links. The user links menu shifts
slightly because of this as well.
Bug: T312157
Change-Id: Id98e566952e5875527f38d1edbc8f6e058af4518
- Rename 'vector-user-menu-more' class to 'vector-user-menu-overflow'
- Update storybook and tests
Visual changes
- Small intentional change on the create account button
Bug: T306662
Change-Id: I371bb11903d8cdd8f0da89266fcf549050c0da8c
There are two issues with context in this test case:
1. The $vectorTemplate object was not given the $context object.
Calling setContext() is the same as MediaWiki would normally do
after calling SkinFactory, e.g. as in RequestContext::getSkin.
2. The "main" glboal state was leaking into the test by mutating
the result of getMain() instead of creating your own for use
in the test.
Change-Id: I09eb8c3a38c0d4e2c85461b61e6f14ab00995016
Use overrideConfigValues instead of installMockMwServices and setMwGlobals.
This ensures that configuration overrides are handled consistently.
This also fixes a data provider that relied on a service, which causes
the test to fail when not run via the pgpunit wrapper.
Depends-On: I898927717ce961d98617a7fcd9c7fa8e19bec412
Change-Id: I6354fa39e1e9adf4be6eb6b26db82b8f106c593e
SkinVector and Hooks both had code to add classes and handle Vector specific template data. This patch simplifies the way we handle menu data to always use Hooks:updateMenuItem. This has an additional side effect of removing instances of mw-ui-icon-before.
Bug: T306628
Change-Id: I73514a0eada4d92705b70e7c2ebd91092fc12544
Follow up to c5cfd4d
1) Partial paths are incorrect
These are not a problem with our current Mustache template
parser but could break with any changes in our PHP implementation
2) Add dedicated class to legacy menus
On the longer term this will allow us to further separate the
old and new CSS.
Change-Id: I056b033855c28f919a4af99784620503f10b9dcb
Add action=edit to the exclusions in $wgVectorMaxWidthOptions
and update the parsing of the query string values for that config
variable to accept a regex.
Bug: T307725
Change-Id: Iba526033d45e18cb340a2648378d3d90ef3ae3c6
- `MediaWiki\Skins\Vector\Tests` is now the prefix for all tests in the skin
- we followed PSR conventions of following folder structure after the prefix
- Optimize imports/use order
- update namespace in skin.json
Bug: T303102
Change-Id: Ib76374d81d973c83adfd6c8e7863ff6d797e655d
Replaced “vector-menu-heading” with ‘’(empty string) in “$portletData['heading-class'] = '';”
in includes/SkinVector.php and updated accordingly the includes/templates/Menu.mustache file.
Updated “vector-menu-heading” with ‘’(empty string) in stories/LanguageButton.stories.data.js,
stories/UserLinks.stories.data.js, and tests/phpunit/integration/SkinVectorTest.php respectively
SkinVector and Storybook are cleaned up.
Bug: T290281
Change-Id: I4ca16953799b3dc52e45674bb398c78f14cfc842
It didn't vary by the skin version as documented in the Constants class,
and merely another instance of GlobalVarConfig.
Change-Id: I0acd0366a241e04bb79f6aae5dc52284dfa578df
The LatestSkinVersionRequirement is problematic for various reasons:
1) It uses the "useskin" query string
parameter which may or may not refer to the correct
skin (in the case of a non-existent skin it will always come to the conclusion that
it is not modern Vector and thus must be legacy).
2) It uses the User object which may or may not be safeToLoad
depending on when called.
The feature seems redundant at this point, as we are separating code
into separate classes Vector and Vector22 and all the features only apply
to modern Vector. I suggest we remove it and use the features explicitly in the skin
intended.
Bug: T305232
Bug: T305262
Bug: T302627
Change-Id: I92fa33547bd601e05ddc8c1468e681892e47c16b
Can be merged when database rows have been updated to
no longer use skin version.
* Drop migration code
* Drop skin version preference
* Drop default skin version and existing accounts skin version
* Move skin definitions into skin.json
* Repurpose SkinVector as an abstract class
* Update READMEs
Bug: T301930
Bug: T294995
Bug: T302627
Change-Id: I7454d8f1cfdef81e7f3df476d8ce86736b46fff2
A user with an ID is a registered user and this test requires
an anonymous user.
Follow up to a1afa7ccb3
Not sure why this was working before, but I'm guessing
setId doesn't modify the User associated with the skin
Change-Id: I32bd74bd5aec1b14fb8b725fca2f8cef5f9d2ba1
Namespaceless class aliases are left behind for migration purposes.
They can be removed at a later date when dependant extensions
and skins are fully updated.
Bug: T301204
Change-Id: I2b37c1889ff862ec8bb41325fc9f654c673cd115
- Add test for SkinVector::shouldLanguageAlertBeInSidebar() method.
- Change some methods to protected status -- acknowledging this is not
an optimal change. Until we can pull out some of the language checks
into its own class with injected dependencies (title, feature manager,
languages), this is an interim solution to try to catch regressions
since the conditional states for showing the alert are complex and
ultimately temporary. Extracting the language checks into their own
class can be done in a follow up ticket to help optimize testing
language checks in isolation.
Bug: T302018
Change-Id: I99b7df3029e0af86e4d67b3f446d4ce99260d33e
Server render the table of contents in a collapsed state when the total
number of headings is equal or greater than the value of
`$wgVectorTableOfContentsCollapseAtCount`. Otherwise, the table of
contents will be server rendered in its "expanded" state.
In addition:
* Revise table of contents tests to call one `assertion` per element so
that it is easier to see the exact element that may fail an assertion.
* Revise table of contents tests to call a mount function that can merge
props to allow for a more flexible set of tests.
* Revise table of contents tests by wrapping a `describe` around tests
that expect the same prop state.
* Adds typedef for table of sections props
Bug: T300973
Depends-On: Ifaee451e1903f2accd0ada2f2ed6dfa3f83037b6
Change-Id: I382200bc603b6abf757a91f14a8a55a6581969bd
The behavior of data loading can differ between submitting and display,
so use FauxRequest to customize the method.
Also fix the order of parameters passing to assertSame(), the first one
should be the expected one.
Change-Id: Icfa062eada75c50cd2c8bc5db2930602d80e9ae7
In I0cd49e6d621cd437e440ac7f7627eaa064ab870c a new field will be
added. Our tests in Vector shouldn't fail every time this happens
Change-Id: Ieb4923e9f58f950ee02ce3eb1446b982d1f5724a
Field name without 'wp' prefix (which is used as the key in html descriptor) is required.
After I58f9df384df8ecc5ebae8cac68ec2251351bc984, values of fields that are supposed to be disabled would be loaded from default, use a miss-matched field name would be treated as disabled.
It works in UI now, but it's not a good idea to strip the 'wp' prefix on the server-side.
Bug: T298819
Change-Id: If98368ad400986afaef3187867f201044ebf0efb
A new vector-2022 skin is added. This will be the eventual home
of the new Vector skin when we are ready to migrate.
Please see SkinVector class for the migration plan to simulate this
as part of testing.
Bug: T291098
Change-Id: Ibaddf94a5bfb5e21bbbaf1e0aa1b343a3f566d2d
The generation of JavaScript will throw a RuntimeException
making it obvious when an invalid A/B test has been setup.
Bug: T297662
Change-Id: I75b0e923463bf52f8fc5b5c6b7f9baf586053154
Remove using of User:getOption since this method
will be hard-deprecated. Now it is soft-deprecated.
Bug: T296083
Change-Id: I3194a9c1c5c70592f88bc4dbedc78846d1141768
After I628435a4a, we were asserting a boolean was given because we're
extending HTMLFormField which requires a boolean value. This was safe
because GlobalPrefs would provide a boolean, but that changed with
I594f6297.
We could rework GlobalPrefs once again to ensure only a boolean is
passed in, but since HTMLLegacySkinVersionField already has special
handling around the data types, it seems to make sense to contain the
type transformation in this class.
Simply removing the Assertion is enough to prevent T296068, however
depending on when the global preference was saved (such as since MW
1.38.0-wmf.9 but before wmf.10), it's possible either a bool or a string
was saved, hence we check for both to ensure correct display.
Bug: T296068
Change-Id: If10b948617d2bb8346475f207fe425fb768cb987
- Separate icon classes from button classes in user links/language
- Upgrades the personal tools language button preference to
a mw-ui-button with icon
- Adds a generic selector for dropdown menus without an icon
- Cleans up user links CSS now mw-list-item class is available
- Removes icon hack CSS
Bug: T289630
Bug: T283757
Change-Id: Ib518858e06549f252d73d57fd4768f446cc561b9
User::setOption() is deprecated and should be replaced with UserOptionsManager::setOption()
Bug: T277818
Change-Id: If867b4f97918db581d337a32b33cbca2315a71f6
Append mw-ui-icon classes to list item not list link
This allows us to apply a custom padding separate from the icon.
Note due to a bug in how core handles personal user items,
this will result in the icons temporarily disappearing for several
items until If399dfff9bbdd3b03b2ca702face3ec5164bef11 is resolved.
This is okay given the user menu is currently feature flagged.
Bug: T191021
Change-Id: I766aeb4d1bb36cebd0d80ad43ced940dbea96477
Since we have feature flagged the new user menu feature, it is
imperative we load both sets of styles until the feature has
shipped. This allows us to switch seamlessly between the two
without worrying about cached HTML being served with updated CSS.
To do this, we add a new class to both user menu's distinguishing
the legacy version from the modern version. The styles are then
scoped to these new selectors.
This also fixes some regressions with the legacy user menu in
modern Vector when wgVectorConsolidateUserLinks is disabled.
Notes:
* No caching selector is needed for #pt-userpage given it can only
ever be output for logged in users.
* ID selectors in general are bad, so scoping to mw-portlet-personal-user-menu-legacy
isolates the legacy component allowing it to be rendered alongside the modern UserMenu
Bug: T276561
Change-Id: I068c5233bb25a7b141e66a6726b5761841f83eb2
* We add the `.mw-interlanguage-selector` class to the
.vector-menu-heading in the server rendered HTML. `ext.uls.interface.js`
later attaches a click handler to this selector that loads the rest of
ULS.
* We hide the dropdown arrow for js users and only show it again if
ext.uls.interface module isn't installed or is not being loaded.
* When the `ext.uls.interface` module has been loaded, we hide the checkbox
and checkbox hack menu in favor of showing the ULS popover.
Additionally:
* Adds '.vector-menu-heading' class to menu headings.
* Change h3 selector to `.vector-menu-heading`.
Bug: T273232
Change-Id: I6f4572c16ca4096dcda3aac4d585003b93dcccfa
FeatureManager allows the logic to be centralized and allows clients to
ask about its state. For instance, SkinVector will make use of it in
I70277c1082a504fbd5f6023e9873e8071de7e35d.
Also:
* Adds WvuiSearchTreatmentRequirementTest to test A/B logic
WvuiSearchTreatmentRequirement/Test logic are adapted from
I878239a85ffbecb5e78d73aed5568c56dbd7d659.
Bug: T270202
Change-Id: Ia02349a7b41c7caf26fbd728e0be7d47488b97e5
SkinMustache in core provides most of what is required for Vector to
generate its menus. In the interest of having a canonical source of
truth for menus across all skins, Vector should use this data.
To ensure the HTML generated is (mostly) the same after this patch to
prior, a few modifications are necessary:
* The data from core is decorated so that Vector can continue having its
own custom class names on menus. This is done using the
decoratePortletClass method.
* There is no support for a menu having a header representing the
selected menu item, as is currently the case with variants. This is
achieved via an extension to getPortletData. It's assumed that later
when variants are merged with languages, this can be removed.
* Menus are agnostic to how they are displayed, so we must continue to
add the is-dropdown template variable to drop down menus. In future we
may want to rethink our Menu partial to make this unnecessary in PHP.
* The portal-first class is redundant in the modern Vector as we can
use the first-child selector. Previously we introduced a class to
service the legacy skin where this rule doesn't apply as #p-logo is
the first child. However, the legacy skin can do this using a special
next sibling selector instead.
Bug: T268157
Change-Id: I5f7adc1840441b508ffee40139b85b64021789e6
Drop support for vectorMenu, vectorTabs and
vectorMenuCheckbox, body, menu selectors in preference
for standard selectors.
This change will impact a large amount of user scripts/styles but should
not impact any gadgets.
These classes were kept around for user scripts and styles however are not
needed internally. As we transition to a more maintainable skin menu
system, it is time to lose these selectors even though this will cause
disruption.
Vector now will use the mw-portlet class rather than the vector-menu
class in its own CSS styling, however it keeps the other classes to
allow differentiation of the different types of menu.
Changes to test: Previously the tests assumed all portlets were empty
when checking the classes. This is very rare, so its better to check
the classes of non-empty portlets, so several tests are updated
accordingly to drop the emptyPortlet class.
Bug: T262092
Change-Id: I1824335eb47d613c2a4804ec1f1106c0f4c16101
Kept as simple as possible for now. The new class is added but no classes
are removed. This will be done in a follow up.
Bug: T256897
Bug: T253938
Change-Id: Ib31a9d8f2ac14e63b63e82abd4a9aa1fcb956f45
Since SkinVector provides name via skin.json the name must be
passed in the test constructor.
This will be required as part of
I5772eb760e4fc56d2062a333ba4d7ca6995f3db2
Change-Id: I4087deb8b0726c9959ac15d77a0ed2442e4890f6
A new config flag is added that buckets 50% of users into the old
header and the 50% into the new header.
Bug: T249363
Change-Id: I8b4fa475f9cd7e61ad2989e2a1485e7e64c8ab3f
I177dad88 introduced the skin version user preference field and
associated configuration values. Per T242381, the field is to presented
as a checkbox with the implied storage type of a boolean where a string
is needed. A PreferencesFormPreSave hook handler was added to adapt
values of either data type to the other. While this was a neat solution
to a minor nit, the adapter's implementation is incompatible with the
GlobalPreferences extension as the PreferencesFormPreSave hook isn't run
whilst saving global preferences.
Rather than adding an equivalent hook to the GlobalPreferences
extension, create a custom field based on a checkbox with the adapter
included. This allows us to:
- Separate the business logic concerned with preserving the user's
VectorSkinVersion preference if they've simply disabled Vector from
the adapter
- Simplify the adapter's implementation
- Forego adding hooks to the GlobalPreferences codebase
Additional changes:
- Replace repeated string literals with equivalent constants in
tests/phpunit/integration/VectorHooksTest.php
Bug: T258493
Change-Id: I628435a4ad676f55534191b8c10147be28be5d73
This hook is run on every page. The SkinTemplateNavigation hook
counter intutively is run only on pages which can exist. I think
it's clearer if we only use SkinTemplateNavigation::Universal hook
and keep the logic for when it runs inside our own code.
Bug: T255319
Change-Id: I0835074a6cadf6e9bdcc45299de37dd9328bf9b2
The feature manager abstracts away how a feature is enabled from the
consumer of that feature. Accordingly, replace direct instantiation of
SkinVersionLookup with usage of the Vector.FeatureManager service.
Supporting changes:
- Add Vector\VectorServices, a simple wrapper around
MediaWiki\MediaWikiServices that allows us to both document and
type-hint services specific to Vector
- Add Vector\Hooks::isSkinVersionLegacy to minimise repetition
Additional changes:
- Make the MakeGlobalVariablesScript hook handler return early if the
user isn't using the Vector skin like the other hook handlers
Bug: T256100
Change-Id: I93b5ef39802323c7ac658af8fa7cc312fff68aa7
In PHP we add collapsible classes to all elements except watchstar
so that certain tabs can be collapsed under the more menu in JS.
This adds unnecessary complexity to our codebase and is not used
if JS is disabled.
To simplify this and bring Vector's PHP consistency with core this
logic is moved to JavaScript.
Bug: T259372
Change-Id: I2acbf7089198118626368ee8a37615d2de062f83
Please note I7e06a4cc226f3434c0f655212a464b8b98bcc7f4 should be
merged at the same time as this patch.
== The background ==
All extensions have been weaned of BaseTemplate hooks in
Wikimedia projects.
This change now means that Vector will no longer run
any BaseTemplate hooks. See the epic T253809 for the
implementation details.
== The change ==
BaseTemplate will now have nothing to do with the rendering of
Vector. The skin version is added to express the significance of
breaking compatibility with 3rd party extensions.
We TEMPORARILY remove SkinVector to retain git blame. SkinTemplateVector will
be renamed SkinVector in the follow up (see 2/2)
Update skin.json to use SkinTemplateVector for the skin (this will be fixed
in a follow up).
The isLegacy method is moved to SkinTemplateVector.
Changes of note:
* html-debuglog is no longer needed. SkinMustache includes this information on
the skins behalf
* html-printtail and html-headelement are now not needed in the master template
and added by SkinMustache
* Skin::getAfterPortlet does not provide the `after-portlet` wrapping element provided
by BaseTemplate::getAfterPortlet so this is added
* SkinTemplate::getFooterIcons does not support the options that BaseTemplate::getFooterIcons
does so any icons which do not have an image must be manually checked for and unset
Known changes to HTML output as a result of intentionally
delegating their output to the core SkinMustache class:
* A new line is removed between the body element and #mw-page-base
* #mw-html-debug-log now appears at the end of the body element
* #printfooter is now a child of #mw-content-text rather than sibling.
Bug: T251212
Change-Id: I4e89beb96f6401ed7e51bafdf0aac408f5a2c42f
- Creates a new user-preference called 'VectorSidebarVisible'
which stores the sidebar hidden/collapsed state for logged-in
users.
- Updates that user-preference on the client whenever the sidebar
is expanded or collapsed.
- Refactors the sidebar related javascript into a separate file.
Bug: T255727
Change-Id: Ib1ce934f3646cd8feebf0d3b15c38b5b969ec957
Begin our journey away from BaseTemplate by
moving VectorTemplate code to SkinVector. In future all
methods will live here but to lower risk, I've only targetted
the get method.
Bug: T251212
Change-Id: I58c2ff5edaacc2d5e45492c121cf0f87d08b623f
The .menu class historically only needs to apply to dropdowns.
the .vectorMenuCheckbox is inconsistent with the other classes on the
menu so we should begin its deprecation.
Bug: T253329
Change-Id: I00b4d2fd795195cd9c8add650a3b3cafdced5465
Use SkinTemplateNavigation hook instead and copy the collapsible
behavior to the menu function
The code inside getSkinData that checks VectorUseIconWatch is
redundant as it duplicates checks already inside
SkinTemplate::buildContentNavigationUrls
It is enough to simplify check whether watch or unwatch is
present in the array.
Bug: T251212
Change-Id: If6b10b0ddcbd4b21dd13a2813e60b604c3a23415
* Standardise the menu markup. This means all menus in Vector will now
be wrapped in a div and will have a heading.
* All menus now have the vector-menu class. Styles specific to personal tools
are moved to layout since these are concerned with placement.
* The ul class will always have menu class.
* emptyPortal class is generalised into vector-menu-empty for consistency
with other classes and moved from common.less into Menu.less
* Standardise hooks - BaseTemplateAfterPortlet can now be run on any
menu.
Changes to HTML:
* lang and dir attributes are moved from the h3 up to the div element
.vectorTabs, .portal(s) and #p-personal now has hidden span element inside h3
* for non portals ul.menu" is now wrapped in a div.vector-menu-content
This change does impact the following CSS selectors which will need to be updated:
I see no matches for these selectors in code search.
```
#p-variants > ul
#p-namespaces > ul
#p-personal > ul
#p-views > ul
#p-cactions > ul
```
Using global-search.toolforge.org I see one match
for p-variants, 26 for p-namespaces, 30 for p-personal,
36 for p-views and 7 for p-cactions. I see this as acceptable
breakage provided a user notice is sent out which it has been
(T252447)
Bug: T249372
Change-Id: Id59234aa6b822a24848386bdc04d8d7ed37ca145
To complete the refactor, the Portal is also refactored
as a Menu using the getMenu function.
An old code path supporting portals outputted by hooks with
strings is marked as deprecated to simplify this code in future.
array-portals-first -> data-portals-first (the value is not
an array)
Changes:
* $this->getLanguages and $this->getToolbox() always returns an array (see BaseTemplate)
but we previously supported portals made using raw HTML. Let's move away from that
behaviour and deprecate it.
* Hooks are moved into buildSidebarProps and marked as deprecated where possible
(SkinTemplateToolboxEnd). SidebarBeforeOutput can be used instead.
Bug: T249372
Change-Id: I2549af3e24e5d51c09e9a88ca50a0d9b2e154c3f
The classes were recently changed so provided this is merged before
next branch cut no need to worry about cached HTML.
Bug: T249073
Change-Id: Ib20c7a359bda858df89ebb245e682d321dd5acd0
the PersonalMenu should be generalised. In future we will use it as
the template for all menus
Bug: T249372
Change-Id: Id1c43d2e9eefef1d7aec45f0137e27f10ad935df
VectorTemplate relies on many of SkinVector's methods. To future
proof these tests we need to set the skin in the mocked object.
Bug: T251212
Change-Id: Ifd9bbc9c909626ecfe8ccd085673bc777423d560
de76ab5 added the config,
`$wgVectorDefaultSkinVersionForExistingAccounts`. Its usage in
`Hooks::onUserGetDefaultOptions()` was invoked not only for existing
accounts but anonymous users _as well._ This is a bug, due to my own
misconceptions about the hook, that went against both the config's name
and its documentation.
Unfortunately, user sessions are unavailable in
`Hooks::onUserGetDefaultOptions()` so it does not seem to be possible to
determine whether the active user is an anonymous or existing account.
This patch drops the hook and centralizes all version determination
logic in SkinVersionLookup::getVersion(). SkinVersionLookup requires a
the active User object and can make the anonymous / existing account
determination by checking login state.
The issued was identified while responding to review feedback given by
@polishdeveloper / @pmiazga in
I52d80942b4270c008d4e45050589ed9220255a50.
Bug: T251415
Change-Id: I7982b4c34283ba81d0232ee6f501c44cf0a74b98
Changes:
- Add the LatestSkinVersionRequirement requirement class, which lazily
evaluates the application state to get the version of the skin for the
request.
This majority of this class is taken from Stephen Niedzielski's
Vector\SkinVersionLookup class, which was introduced in d1072d0fdf.
- Register an instance of LatestSkinVersionRequirement and register the
'LatestSkin' feature that requires that requirement
- Re-introduce SkinVector::isLegacy and make it defer to the Feature
Manager
Bug: T244481
Change-Id: If6b82a514aa5afce73e571abdd8de60b16a62fa8
