* Use `postMessage` transport for header image settings by default when video headers are supported, and thus `the_custom_header_markup()` will necessarily be used (and thus a selective refresh partial will be available).
* Ensure that `the_custom_header_markup()` always outputs a container element in the customizer preview even if the header is empty.
* Ensure that edit shortcut appearing for custom header does not get positioned off-screen.
Props bradyvercher, westonruter.
See #38639.
Fixes#38737.
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When a page is scrolled, the top nav menu become fixed. Depending on the page content this caused issue where focused links or buttons may be hidden behind the nav menu.
Props afercia, davidakennedy, Fencer04
Fixes#38476
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For developers wanting to add their own registered collection parameters, they can now use the `rest_$type_collection_params` filter. This brings consistency with the already existing `rest_$post_type_collection_params`.
Fixes#38710.
Props jnylen0.
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With the addition of Array support in our schema validation functions, it's now possible to use these in the meta validation and sanitization steps. Also, this increases the test coverage of using registered via meta the API significantly.
Fixes#38531.
Props rachelbaker, tharsheblows.
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* Toggles `has-header-image` body class in Customizer preview whenever images or videos are added or removed.
* Hides the `.custom-header-image`div in CSS when an image or video haven't been set so preview changes are smoother.
* Also fixes the main issues in #38391 – making the preview match.
Props bradyvercher.
Fixes#38627.
See #38391.
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IE9 doesn't understands `vh ` (vertical height) when inside of an `iframe`. Normally IE9 will understand `vh` as the vertical height relative to the viewport, but in an `iframe`, IE9 thinks the vertical height is relative to the size of the whole page. So this fixes that when the site is viewed in the Customizer preview – an `iframe`.
Props laurelfulford.
Fixes#38722.
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Adds translation context for "Hide Controls" strings so translators can supply shorter strings where space is constrained. Adds styles to fade-out long the "Hide Controls" label where it would run into the device preview buttons.
Props westonruter, ocean90.
Fixes#38762.
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This helps affirm that your upload is fine, and has not been reduced down to the first page or changed into an image. This applies to the attachment details modal in the media library, where media is also now centered in the preview area.
props folletto, helen.
fixes#38717.
Built from https://develop.svn.wordpress.org/trunk@39213
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Due to the `clear_update_cache` parameter not being respected, update caches were being cleared incorrectly which prevented multiple plugins to be updated at the same time in background updates - failing with a `fs_unavailable` error message.
Fixes#38024
Built from https://develop.svn.wordpress.org/trunk@39211
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* Add `customize_value_custom_css` filter to `WP_Customize_Custom_CSS::value()` method.
* Introduce `customize_update_custom_css_post_content_args` filter in `WP_Customize_Custom_CSS::update()` method.
* Make clear that `wp_get_custom_css()` and `wp_get_custom_css` filter are specifically for obtaining the value to render/display. Eliminate use of `wp_get_custom_css()` when getting the setting value. Use the underlying `post_value` directly when `is_previewed`.
* Move anonymous functions handing JS previewing for `custom_logo`, `custom_css`, and `background` into named functions on the `wp.customize.settingPreviewHandlers` to allow plugins to override/extend preview logic.
* Update `_custom_background_cb` to always print a `style` tag wen in the customizer preview, and update background preview logic to replace existing style element instead of appending a new style to the head so that background changes don't unexpectedly override any Custom CSS in the preview's stylesheet cascade.
Props westonruter, georgestephanis.
See #22058.
Fixes#38672.
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"Header Visuals" is a bit vague since the title/tagline are arguably
also “header visuals”. "Header Media" is more descriptive and is
consistent with how we refer to images/videos throughout core.
Props bradyvercher.
Fixes#38756.
Built from https://develop.svn.wordpress.org/trunk@39205
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Removes the `.customize-partial-edit-shortcut-left-margin` class which was not effective on some themes, created a worse experience for other themes, and which did not recalculate when the preview was reflowed or resized. Now some small-width media queries are added to handle common cases while more dramatic issues can be handled by the theme. Also renames `Partial.positionEditShortcut()`to `Partial.addEditShortcutToPlacement()` which is a more accurate description of its function.
Props sirbrillig, sstoqnov.
See #38651, #27403.
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Restoring the current user context when saving a setting ensures filters apply as expected, such as Kses. When a user is not associated with a given setting change, continue to override `capability` to be `exist` when saving. Skip overwriting setting values in a changeset that have not changed, facilitating concurrent editing and amending a changeset by a user with fewer privileges.
See #30937.
Fixes#38705.
Built from https://develop.svn.wordpress.org/trunk@39181
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Additionally, use these meta-caps in the REST API endpoints.
Previously, register_meta()'s auth_callback had no effect for non-post meta. This introduces `{add,edit,delete}_{comment,term,user}_meta` meta-caps to match the existing post meta capabilities. These are currently only used in the REST API.
Props tharsheblows, boonebgorges.
Fixes#38303, fixes#38412.
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