* Update stubs to have draft status when changeset is saved as draft, instead of preventing auto-draft garbage collection by giving them a far-future `post_date`.
* Show notice in publish metabox when editing a customization draft indicating that it will be published automatically with its changeset; a link to Customizer is included.
* Include a new "Customization Draft" display post state in the post list table.
* Disconnect stubs from their changesets when they are updated with a status other than "Draft".
* Trash customization drafts when their related changeset is trashed or deleted.
* Add a `_customize_changeset_uuid` postmeta to stubs to link them with their associated changeset.
* Include `customize_changeset_uuid` as context when requesting to insert a new auto-draft.
Props westonruter, melchoyce.
See #39896, #39752, #34923.
Fixes#42220.
Built from https://develop.svn.wordpress.org/trunk@41887
git-svn-id: http://core.svn.wordpress.org/trunk@41721 1a063a9b-81f0-0310-95a4-ce76da25c4cd
The meta capabilities `install_languages` and `update_languages` rely on the admin function `wp_can_install_language_pack()`. That function in turn relies on `request_filesystem_credentials()`, so it needs to be ensured that this function is available as well.
Fixes#42230.
Built from https://develop.svn.wordpress.org/trunk@41885
git-svn-id: http://core.svn.wordpress.org/trunk@41719 1a063a9b-81f0-0310-95a4-ce76da25c4cd
While `get_site_by()` makes sense as a more explicit and less complex replacement for `get_blog_details()`, it is not ready yet in terms of caching, where it currently falls short of the older function under specific circumstances.
See #40180, #40228.
Built from https://develop.svn.wordpress.org/trunk@41883
git-svn-id: http://core.svn.wordpress.org/trunk@41717 1a063a9b-81f0-0310-95a4-ce76da25c4cd
The warning displayed upon first visit on the File Editors introduced in [41774]
needs to be the only perceivable content in the page for users of assistive
technologies. It looks like a modal but it's not exactly an ARIA dialog, not an
ARIA alert either, and needs some special treatment.
- constrains tabbing within the modal
- uses `wp.a11y.speak()` to make screen readers announce the modal message
- hides all the other page content from assistive technologies using `aria-hidden="true"`
This way, even if users miss the speak message, the warning is actually the only
perceivable content in the page.
Fixes#42110.
Built from https://develop.svn.wordpress.org/trunk@41876
git-svn-id: http://core.svn.wordpress.org/trunk@41710 1a063a9b-81f0-0310-95a4-ce76da25c4cd
When the `WP_Network::$blog_id` property is set manually, for example in the multisite bootstrap process, `get_main_site_id()` should use that value instead of running its own logic. The main logic for the function was therefore moved into the internal `WP_Network::get_main_site_id()` method, which is now being accessed by the function through the magic property handling for `WP_Network::$blog_id` (and its equivalent `WP_Network::$site_id`).
Props spacedmonkey, jeremyfelt.
Fixes#41936.
Built from https://develop.svn.wordpress.org/trunk@41861
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* Update date control padding.
* Collapse publish settings section when opening panes for available widgets or nav menus.
* Remove save and cog buttons in mobile preview only mode.
* Move definition of `wp.customize.previewedDevice` to `wp.customize.state('previewedDevice')` for centralization, maintaining old alias.
* Remove unused CSS because the section is inside form now.
Props sayedwp, westonruter.
See #39896.
Fixes#42027, #42199.
Built from https://develop.svn.wordpress.org/trunk@41860
git-svn-id: http://core.svn.wordpress.org/trunk@41694 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix an issue where the escape key would no longer close the attachment details modal after attempting to navigate over the navigation boundaries (by clicking the left arrow key on the first media item or clicking the right arrow key on the last media item). Remove a focus blur which caused the underlying Backbone View to not receive the 'keydown' event.
Props subrataemfluence, afercia.
Fixes#42180.
Built from https://develop.svn.wordpress.org/trunk@41856
git-svn-id: http://core.svn.wordpress.org/trunk@41690 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Previously, shortcodes were being counted when the `init` action fired, even though it's possible for shortcodes to be registered later than that.
By leaving the counting until just before the script is printed, we get a more accurate list of shortcodes.
Props ocean90.
Fixes#41917.
Built from https://develop.svn.wordpress.org/trunk@41844
git-svn-id: http://core.svn.wordpress.org/trunk@41678 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Previously, the (W) logo on the single site login screen linked to wordpress.org, with an appropriate `title` attribute, but the link text was the blog name.
To fix this discrepency, the link text is now the same as the `title` attribute.
Props pento, obrienlabs, afercia, flixos90, lukecavanagh, and the infinite stack of bikesheds that WordPress is balanced upon.
Fixes#34625.
Built from https://develop.svn.wordpress.org/trunk@41843
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* Customization locking is checked when changesets are saved and when heartbeat ticks.
* Lock is lifted immediately upon a user closing the Customizer.
* Heartbeat is introduced into Customizer.
* Changes made to user after it was locked by another user are stored as an autosave revision for restoration.
* Lock notification displays link to preview the other user's changes on the frontend.
* A user loading a locked Customizer changeset will be presented with an option to take over.
* Autosave revisions attached to a published changeset are converted into auto-drafts so that they will be presented to users for restoration.
* Focus constraining is improved in overlay notifications.
* Escape key is stopped from propagating in overlay notifications, and it dismisses dismissible overlay notifications.
* Introduces `changesetLocked` state which is used to disable the Save button and suppress the AYS dialog when leaving the Customizer.
* Fixes bug where users could be presented with each other's autosave revisions.
Props sayedwp, westonruter, melchoyce.
See #31436, #31897, #39896.
Fixes#42024.
Built from https://develop.svn.wordpress.org/trunk@41839
git-svn-id: http://core.svn.wordpress.org/trunk@41673 1a063a9b-81f0-0310-95a4-ce76da25c4cd
On narrower devices, input fields are too short to fit the number of default digits they contain. This widens the fields and also breaks each height and width attribute onto a new line for better usability, using some terrible CSS trickery. My apologies.
Props: Toru, Presskopp, desrosj, xkon, ryelle, melchoyce.
Fixes#34539.
Built from https://develop.svn.wordpress.org/trunk@41836
git-svn-id: http://core.svn.wordpress.org/trunk@41670 1a063a9b-81f0-0310-95a4-ce76da25c4cd
JSON files don't need a particular indent style, this was just inherited from the jQuery `.editorconfig`, that we based ours on.
`package.json` is staying in the 2-space-indent group for now, due to npm 3 and 4 having issues. Upgrading to npm 5 will allow us to remove `package.json`, too.
Props netweb.
Fixes#40946.
Built from https://develop.svn.wordpress.org/trunk@41835
git-svn-id: http://core.svn.wordpress.org/trunk@41669 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fixes an issue where hovering over the warning icon didn't work if there were multiple warnings on the same line of code. Also updates the cursor from "pointer" to "help" when hovering over warnings and errors.
Props joyously, obenland.
Fixes#42129.
Built from https://develop.svn.wordpress.org/trunk@41830
git-svn-id: http://core.svn.wordpress.org/trunk@41664 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This fixes a change in behaviour introduced by [41629].
The host is set to an empty string when it isn't defined, this continues existing behaviour. In particular, the mysqli library treats a `null` host as being the same as `localhost`, which is not always the intended behaviour.
Props birgire, markjaquith, pento.
Fixes#41722.
Built from https://develop.svn.wordpress.org/trunk@41820
git-svn-id: http://core.svn.wordpress.org/trunk@41654 1a063a9b-81f0-0310-95a4-ce76da25c4cd
On newer versions of MySQL, an error was being thrown when creating a table with an index that we wanted to be silently truncated.
To avoid this, the test now tries to use a newer InnoDB file format where available, and skips the test when that happens.
Props pento, danielbachhuber, straussd.
Fixes#41716.
Built from https://develop.svn.wordpress.org/trunk@41818
git-svn-id: http://core.svn.wordpress.org/trunk@41652 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Introduce `WP_Customize_Themes_Section::$filter_type`, which has built-in functionality for `local` and `remote` filtering. When this set to `local`, all themes are assumed to be loaded from Ajax when the section is first loaded, and subsequent searching/filtering is applied to the loaded collection of themes within the section. This is how the core "Installed" section behaves - third-party sources with limited numbers of themes may consider leveraging this implementation. When this is set to `remote`, searching and filtering always triggers a new remote query via Ajax. The core "WordPress.org" section uses this approach, as it has over 5000 themes to search.
* Refactor `filterSearch()` to accept a raw term string as input. This enables a feature filter to be used on a section where `filter_type` is `local`.
* Refactor `filter()` on a theme control to check for an array of terms. Also sort the results by the number of matches. Rather than searching for an exact match, this will now search for each word in a search distinctly, allowing things like tags to rank in search results more accurately.
* Split `loadControls()` into two functions for themes section JS: `loadThemes()` to initiate and manage an Ajax request and `loadControls()` to create theme controls based on the results of the Ajax call. If third-party sections need to change the way controls are loaded, such as by using a custom control subclass of `WP_Customize_Theme_Control`, this allows them to use the core logic for managing the Ajax call and only override the actual control-creation process.
* Introduce `customize_load_themes` filter to facilitate loading themes from third-party sources (or modifying the results of the core sections).
* Bring significant improvements to the installed themes search filter.
Props celloexpressions.
Amends [41648].
See #37661.
Fixes#42049.
Built from https://develop.svn.wordpress.org/trunk@41807
git-svn-id: http://core.svn.wordpress.org/trunk@41641 1a063a9b-81f0-0310-95a4-ce76da25c4cd
The theme and plugin editors now list all files in the selected theme or plugin, recursing through subdirectories as necessary.
Props WraithKenny, schlessera, chsxf, MikeHansenMe, Daedalon, valendesigns, westonruter, pento.
Fixes#6531.
Built from https://develop.svn.wordpress.org/trunk@41806
git-svn-id: http://core.svn.wordpress.org/trunk@41640 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Increase PHP execution time limit prior to issuing loopback requests where are themselves given timeouts to ensure PHP file can be reverted.
* Output scrape messages on success and failure so that absence of either can also be flagged as an error condition.
* Forward browser's HTTP Basic Auth credentials in loopback requests to admin and home URL.
* Display more helpful message when loopback request fails.
Amends [41721].
See #21622.
Fixes#42102.
Built from https://develop.svn.wordpress.org/trunk@41805
git-svn-id: http://core.svn.wordpress.org/trunk@41639 1a063a9b-81f0-0310-95a4-ce76da25c4cd
It doesn't look like `wp_register_sidebar_widget()` ever used a global named `$wp_register_widget_defaults`. It does however make use of `$wp_registered_widget_controls` now.
See [8960], [30776].
Props upadalavipul.
Fixes#41592.
Built from https://develop.svn.wordpress.org/trunk@41798
git-svn-id: http://core.svn.wordpress.org/trunk@41632 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Open the door for future browser history feature in #28536, which is currently not feasible when customize-loader is used.
* Remove customizer-loader from being used on admin screens for Dashboard, Themes, non-shiny theme install/update.
* Keep the customize-loader functionality available for plugins, for the time being. It may become deprecated.
* Ensure `return` param in customizer links in Themes screen update to reflect `search` updated by `pushState`.
* Persist `return` when reloading Customizer due to theme switch, autosave restoration, or changeset trashing.
* Use `location.replace()` instead of changing `location.href` when trashing.
* Hide theme browser while Themes screen is loading when there is a `search` to prevent flash of unfiltered themes.
* Use throttling instead of debouncing when searching themes to ensure that screen is updated immediately on page load.
* Fix encoding and decoding of `search` param between URL and search field.
* Add support for dismissing autosaves when closing customize-loader, when it is used by plugins.
* Skip sending changeset UUID to customize-loader for population in browser location if changeset branching is not enabled.
See #28536.
Fixes#40254.
Built from https://develop.svn.wordpress.org/trunk@41797
git-svn-id: http://core.svn.wordpress.org/trunk@41631 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Prevent autoloading an existing draft/future changeset when theme not active.
* Add missing notifications container to Themes panel.
* Remove deactivation of themes panel when selected status is not publish.
* Show notification in Themes panel when themes cannot be previewed and disable preview buttons.
* Reject installTheme call when theme preview not available.
* Return promise from installTheme and eliminate use of global events in favor of promises.
Props westonruter, melchoyce, zoonini.
See #37661, #39896.
Fixes#42126.
Built from https://develop.svn.wordpress.org/trunk@41788
git-svn-id: http://core.svn.wordpress.org/trunk@41622 1a063a9b-81f0-0310-95a4-ce76da25c4cd
- Fix keeping text selection and scroll position when there are embeds from URL.
- Add editor setting to disable keeping selection and scroll position.
- Remove dependency on Underscore.js.
- Fix error in the Text widget editor.
Props biskobe.
Fixes#42059, see #40854.
Built from https://develop.svn.wordpress.org/trunk@41783
git-svn-id: http://core.svn.wordpress.org/trunk@41617 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This is an effort to provide a speed bump before heading into something potentially destructive and some education for users on better alternatives, even as we make the file editors safer to use. Each user, including existing users, will be shown a one-time dismissible modal warning on their first visit to each of the theme and plugin file editors.
Copy tweaks to come.
props michelleweber, Ipstenu, melchoyce, adamsilverstein, westonruter, toddnestor, aryamaaru, ZaneMatthew, cliffseal, helen.
fixes#31779.
Built from https://develop.svn.wordpress.org/trunk@41774
git-svn-id: http://core.svn.wordpress.org/trunk@41608 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Often, folks run into two issues when they create new menus: they click "Add a Menu" thinking it will add a new page to their menu, or they forget to assign their new menu to a location, and then wonder why it doesn't show up on their site.
This commit rearranges the order of items in the menu panel, and updates the flow for creating a menu by breaking it up into steps. Additionally, more help text has been added to guide people through the process of creating a menu.
Also adds default `type` lookups for Panel and Section instances. See #30741.
Props bpayton, obenland, westonruter, celloexpessions, afercia, melchoyce, zoonini, michelleweber.
Fixes#40104.
Built from https://develop.svn.wordpress.org/trunk@41768
git-svn-id: http://core.svn.wordpress.org/trunk@41602 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Adds an "include_slug" orderby value for REST API collections to permit returning a collection filtered by slugs in the same order in which those slugs are specified.
Previously, the order of slugs provided with the ?slug query parameter had no effect on the order of the returned records.
Props wonderboymusic, ocean90, boonebgorges.
Fixes#40826.
Built from https://develop.svn.wordpress.org/trunk@41760
git-svn-id: http://core.svn.wordpress.org/trunk@41594 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Enables register_setting to accept an object as its schema value, allowing settings to accept non-scalar values through the REST API.
This whitelists the added type in the settings controller, and passes properties from argument registration into the validation functions.
Props joehoyle.
See #38583.
Built from https://develop.svn.wordpress.org/trunk@41758
git-svn-id: http://core.svn.wordpress.org/trunk@41592 1a063a9b-81f0-0310-95a4-ce76da25c4cd
- Remove plugins icons from the plugin list table, as there were performance issues loading the icons when the site had lots of plugins.
- Depending on which icons the plugin has uploaded, prefer them in this order: `svg`, `128x128`, `256x256`.
- Improve the style of the fallback icon for plugins that don't have an icon defined.
Props Travel_girl, danieltj, afercia, karmatosed,hugobaeta, empireoflight, brentjett, melchoyce, pento.
Fixes#30186.
Built from https://develop.svn.wordpress.org/trunk@41755
git-svn-id: http://core.svn.wordpress.org/trunk@41589 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Allow passing settings in keyed object (e.g. `settings: { default: 'id' } ), or as an array (e.g. `settings: [ 'id' ]`) with first being default; again, `Setting`/`Value` objects may be supplied instead of IDs.
* Allow a single setting to be supplied with just a single `setting` param, either a string or a `Setting`/`Value` object.
* Update `changeset_status` and `scheduled_changeset_date` to be added dynamically with JS and simply passing of `api.state()` instances as `setting`.
* Introduce a `data-customize-setting-key-link` attribute which, unlike `data-customize-setting-link`, allows passing the setting key (e.g. `default`) as opposed to the setting ID.
* Allow `WP_Customize_Control::get_link()` to return `data-customize-setting-key-link` when setting is not registered.
* Eliminate `default_value` from `WP_Customize_Date_Time_Control` since now comes from supplied `Value`.
* Export status choices as `wp.customize.settings.changeset.statusChoices`.
* Export date and time formats as `wp.customize.settings.dateFormat` and `wp.customize.settings.timeFormat` respectively.
Props westonruter, sayedwp.
See #39896, #30738, #30741, #42083.
Fixes#37964, #36167.
Built from https://develop.svn.wordpress.org/trunk@41750
git-svn-id: http://core.svn.wordpress.org/trunk@41584 1a063a9b-81f0-0310-95a4-ce76da25c4cd
When able to be parsed, store the created date for a video file from meta,
since this is useful separately from the dates on the file itself.
Introduces `wp_get_media_creation_timestamp()` to read the timestamp from
getID3 and a `wp_read_video_metadata` filter analogous to
`wp_read_image_metadata`.
Fixes#35218.
Props stevegrunwell, joemcgill, desrosj, blobfolio, mikeschroder.
Built from https://develop.svn.wordpress.org/trunk@41746
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Allows REST API consumers to specify the specific fields needed in their application code, whitelisting those fields and omitting all others from the returned JSON response object.
This permits applications that only need for example the ID and title of posts to avoid having to transfer the entire rendered post content over the wire alongside the desired fields.
While this whitelisting has no affect on the queries run when preparing the response, it can yield significant reductions in the bandwidth required to transfer a response payload for simple applications.
Props adamsilverstein, TimothyBlynJacobs, svrooij.
Fixes#38131.
Built from https://develop.svn.wordpress.org/trunk@41744
git-svn-id: http://core.svn.wordpress.org/trunk@41578 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This sets a referrer policy of `same-origin` which adds hardening by preventing a referrer being sent from the admin area or login screens to other origins. This helps prevent unwanted exposure of potentially sensitive information that may be contained within URLs.
This change introduces a new filter, `admin_referrer_policy`, for filtering the referrer policy header value. The header can be disabled if necessary by removing the `wp_admin_headers` action from the `admin_init` and `login_init` hooks.
Props joostdevalk
Fixes#42036
Built from https://develop.svn.wordpress.org/trunk@41741
git-svn-id: http://core.svn.wordpress.org/trunk@41575 1a063a9b-81f0-0310-95a4-ce76da25c4cd
`get_sites()` queries for a maximum of 100 records by default. In `domain_exists()`, we only use one.
A previous commit, [41736], has this same commit message but applies to `get_blog_id_from_url()` and #42073 instead.
Props danieltj, spacedmonkey.
Fixes#42072.
Built from https://develop.svn.wordpress.org/trunk@41738
git-svn-id: http://core.svn.wordpress.org/trunk@41572 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fixes an issue where submitting a well-formed request to create a term inappropriately returns a 500 error status if that term already exists.
HTTP 5xx error codes should be reserved for unexpected server errors, so "409 Conflict" is a more appropriate response.
Props alibasheer, guzzilar, shooper.
Fixes#41370.
Built from https://develop.svn.wordpress.org/trunk@41737
git-svn-id: http://core.svn.wordpress.org/trunk@41571 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This adds `Custom_Image_Header::get_previous_crop()`, which finds any
previously cropped headers created from the same base image and replaces
that attachment rather than creating a new attachment.
After updating a crop, the replaced images is also removed from the list
of previous header images in the Customizer.
See #21819.
Built from https://develop.svn.wordpress.org/trunk@41732
git-svn-id: http://core.svn.wordpress.org/trunk@41566 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Move the `create_function()` code into a file that's only loaded, and into a test that's only run, on PHP <= 7.2 to avoid deprecated warnings in 7.2+.
* Convert the test skipping into a failure if the GlotPress locale file cannot be downloaded.
* Ensure `test_exceptions` fails if an exception is not thrown.
* Docs improvements
See #41562, #40109
Built from https://develop.svn.wordpress.org/trunk@41730
git-svn-id: http://core.svn.wordpress.org/trunk@41564 1a063a9b-81f0-0310-95a4-ce76da25c4cd
When registering routes developers can now define their complex objects in the schema and benefit from the automatic validation and sanitization in the REST API. This also paves the way for support for complex object registration via register_meta and register_setting.
See #38583.
Props TimothyBlynJacobs5.
Built from https://develop.svn.wordpress.org/trunk@41727
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* Eliminate need to pass both ID and instance in calls to `Values#add()` for panels, sections, controls, settings, partials, and notifications.
* Eliminate need to supply `content` param when constructing a `Control`.
* Unwrap the `options.params` object passed in constructors to just pass a flat `options`. (Back-compat is maintained.)
* Add support for `templateId` param for `Control` to override which template is used for the content.
* Remove unused `previewer` being supplied in `Control` instances.
* Rename `classes` to `containerClasses` on `Notification`.
* Automatically supply `instanceNumber` to improve stable sorting.
* Use `api.Notifications` for notifications in settings instead of `api.Value`.
See #30741.
Fixes#42083.
Built from https://develop.svn.wordpress.org/trunk@41726
git-svn-id: http://core.svn.wordpress.org/trunk@41560 1a063a9b-81f0-0310-95a4-ce76da25c4cd
`test_cache` used PHPUnit's object mocking to test some internal behaviour in `Plural_Forms`, but made use of the `willReturn()` method, which was introduced in PHPUnit 4.0 as shorthand for `will($this->returnValue())`. Fixed by switching to the longer form.
Several tests used the `@expectedException` directive to catch generic `Exception` exceptions, which was added in PHPUnit 3.7. Fixed by changing to an explicit `try` / `catch` test.
See #41562.
Built from https://develop.svn.wordpress.org/trunk@41725
git-svn-id: http://core.svn.wordpress.org/trunk@41559 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Historically, we've evaluated the plural forms for each language using `create_function()`. This is being deprecated in PHP 7.2, so needs to be replaced.
The `Plural_Forms` class parses the `Plural-Forms` header from the PO file, and internally caches the result of all subsequent plural form tests, allowing it to match the performance of the existing code.
Props rmccue.
Fixes#41562.
Built from https://develop.svn.wordpress.org/trunk@41722
git-svn-id: http://core.svn.wordpress.org/trunk@41556 1a063a9b-81f0-0310-95a4-ce76da25c4cd
* Edits to active plugins which cause PHP fatal errors will no longer auto-deactivate the plugin. Supersedes #39766.
* Introduce sandboxed PHP file edits for active themes, preventing accidental whitescreening of a user's site when introducing a fatal error.
* After writing a change to a PHP file for an active theme or plugin, perform loopback requests on the file editor admin screens and the homepage to check for fatal errors. If a fatal error is encountered, roll back the edited file and display the error to the user to fix and try again.
* Introduce a secure way to scrape PHP fatal errors from a site via `wp_start_scraping_edited_file_errors()` and `wp_finalize_scraping_edited_file_errors()`.
* Moves file modifications from `theme-editor.php` and `plugin-editor.php` to common `wp_edit_theme_plugin_file()` function.
* Refactor themes and plugin editors to submit file changes via Ajax instead of doing full page refreshes when JS is available.
* Use `get` method for theme/plugin dropdowns.
* Improve styling of plugin editors, including width of plugin/theme dropdowns.
* Improve notices API for theme/plugin editor JS component.
* Strip common base directory from plugin file list. See #24048.
* Factor out functions to list editable file types in `wp_get_theme_file_editable_extensions()` and `wp_get_plugin_file_editable_extensions()`.
* Scroll to line in editor that has linting error when attempting to save. See #41886.
* Add checkbox to dismiss lint errors to proceed with saving. See #41887.
* Only style the Update File button as disabled instead of actually disabling it for accessibility reasons.
* Ensure that value from CodeMirror is used instead of `textarea` when CodeMirror is present.
* Add "Are you sure?" check when leaving editor when there are unsaved changes.
Supersedes [41560].
See #39766, #24048, #41886.
Props westonruter, Clorith, melchoyce, johnbillion, jjj, jdgrimes, azaozz.
Fixes#21622, #41887.
Built from https://develop.svn.wordpress.org/trunk@41721
git-svn-id: http://core.svn.wordpress.org/trunk@41555 1a063a9b-81f0-0310-95a4-ce76da25c4cd
`get_site_by()` is now the preferred way to retrieve a site object by lookup for identifying data. By using a coherent structure and `get_sites()` internally, it has several advantages over the direct database queries and complex code in `get_blog_details()`. Therefore `get_blog_details()` is now a wrapper for `get_site_by()`, providing backward compatibility fixes where necessary.
Unit tests have been adjusted to account for the `blog-details` and `blog-lookup` cache groups, which are no longer needed.
Props spacedmonkey, jeremyfelt, flixos90.
Fixes#40228.
Built from https://develop.svn.wordpress.org/trunk@41719
git-svn-id: http://core.svn.wordpress.org/trunk@41553 1a063a9b-81f0-0310-95a4-ce76da25c4cd
