When a theme supports HTML5 captions via add_theme_support( 'html5', 'caption' ), figure and figcaption will be used instead of div and p.
There's a bonus. But first, some history: Captions were introduced with an inline style set for the container. This remains, as it is there to force captions to wrap. But this inline style included an extra 10 pixels, which have vexxed theme developers for years. While these pixels were designed to ensure padding around floated images, modern themes handle this with grace. The additional pixels thus feel encumbering.
As the new HTML5 gallery support avoids outputting default gallery styles (again, irking theme developers for years; see #26697), the new HTML5 caption support will also ditch these 10 pixels of unwanted hand-holding.
The 10 pixels are also removed entirely in the visual editor (and more styles may also disappear here; see #26642), giving themes the power necessary to match the frontend styles.
The filter img_caption_shortcode_width added in 3.7 to work around this madness (see #14380) is skipped entirely when the theme supports HTML5 captions.
props obenland, azaozz.
see #26642. also fixes#9066.
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* Abstract the setting of a primary button and its callback in `wp.media.view.MediaFrame.MediaDetails`
* Account for the existence or non-existence of `$content_width` in the TinyMCE views for video
* Make sure video models always have dimensions, even if they are the defaults
* For browsers that are not Firefox, don't use a timeout when setting the `MediaElementPlayer` instance in TinyMCE views
See #27320.
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* Support a `caption` attribute for audio and video shortcodes
* In `wp.media.audio|video`, rename `update` to `shortcode` to allow these models to share the same mixins as `wp.media.collection` subclasses
* When sending an audio or video shortcode to the editor, create a default caption if the user hasn't entered one. This currently only displays in the editor, not on the front end. Captions aren't tied to a specific attachment here because external sources are supported.
* In the `wp.mce.media` mixin, in the `edit` method, read `attr` instead of `data` when attempting to parse the encoded shortcode. `data` does not automatically update when the attribute changes. This was a blessing to debug.
* Add `wp.mce.media.PlaylistView` to support playlist views in TinyMCE
* Expose `WPPlaylistView` to global scope and suppress auto-parsing of playlist nodes when in the admin. Allow `WPPlaylistView` to be passed `metadata` on creation instead of requiring a JSON blob to be parsed.
* Remove all of the playlist logic from the `wpgallery` TinyMCE plugin.
* In `wp_prepare_attachment_for_js()` return more data for audio/video so that playlists can have parity in the admin/front end.
See #27320.
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UX Changes:
* Don't add a menu item for "Add Audio|Video Source"
* In the Audio|Video Details modal, add buttons and some suggestive text for adding alternate playback sources
* Don't show "Create Audio|Video Playlist" menu items until the user has uploaded audio or video files
See #27437.
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* Add an action, `wp_playlist_scripts`, where a user can turn off all default script and style loading for playlists and roll their own.
* Move the script and style loading for playlists to a function, `wp_playlist_scripts( $type )`, that hooks into `wp_playlist_scripts`.
* Make the `<noscript>` playlist output an `<ol>`, instead of a list of links with no surrounding markup.
See #26631.
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* Add a state: `Add Subititles`
* Add `text/vtt` to the list of allowed mime-types, files end in `.vtt`. `.srt` files are served as `text/plain`.
* The content body of a video shortcode should be used for adding `<track>` elements only. This happens dynamically in the modal. If added by hand, they can still be parsed and managed.
See #27016.
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* Make a generic model, `wp.media.model.PostMedia`, which replaces `wp.media.model.PostAudio` and `wp.media.model.PostVideo`
* Make a generic library, `wp.media.controller.MediaLibrary`, which replaces `wp.media.controller.ReplaceVideo` and `wp.media.controller.ReplaceAudio`
* `wp.media.controller.MediaLibrary` is used to create new states that want to load a library filtered by type, making it incredibly simple to add states to frames. See `wp.media.view.MediaFrame.VideoDetails` and `wp.media.view.MediaFrame.AudioDetails`.
UX changes:
* Add the ability to manage HTML5 fallbacks - add additional `<source>`s or remove specific `<source>`s
* In the Video Details state, add the ability to select a poster image
See #27016.
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* Add `embedMimes` to `_wpMediaViewsL10n`
* Use `escape` instead of `interpolate` when setting attributes in Underscore templates
* When creating the `<audio>` and `<video>` tags dynamically, set inner `<source>` nodes instead of the `src` attribute and properly set the mime-type per source as the `type` attribute. This is also drastically reduces the amount of code used to generate the tags.
See #27016.
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* Add `wp.media.mixin`.
* Add `wp.media.audio` and `wp.media.video`.
* Add `wp.media.model.PostAudio` and `wp.media.model.PostVideo`
* Add `wp.media.controller.AudioDetails` and `wp.media.controller.VideoDetails`.
* Add `wp.media.controller.ReplaceAudio` and `wp.media.controller.ReplaceVideo`.
* Add `wp.media.view.MediaFrame.AudioDetails` and `wp.media.view.MediaFrame.VideoDetails`.
* Add `wp.media.view.AudioDetails` and `wp.media.view.VideoDetails`.
* Update the `wpgallery` TinyMCE plugin.
* Display audio and video players in the media modal when shortcode is clicked.
* Provide a UI to edit shortcode attributes in the media modal.
* Provide a UI to replace the `src` media file in an `audio` or `video` shortcode.
See #27016.
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* Don't force a pseudo-mime-type for `.m4v` files
* Uniformly adapt to `$content_width` when setting video dimensions on the front end
* Add the `height` attribute to the initial `<video>` in the video playlist JS template
* Add some defensive/responsive CSS for a/v on the Edit Media page
See #27243.
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* Playlists operate like galleries in the admin.
* Provide default UI and JS support in themes using MediaElement and Backbone.
* The shortcodes are clickable, editable, and configurable using the media modal.
* Playlists support images for each item, whether or not the current theme supports images for `attachment:audio` and `attachment:video`
* Playlists respond to `$content_width` and resize videos accordingly.
* All playlist data is included inline, using a script tag with `type="application/json"`, allowing anyone to unenqueue the WP playlist JS and roll their own.
* Playlist styles are minimal and work out of the box in the last 5 default themes. They inherit and adapt to the current theme's font styles, and their rules are easily overrideable.
See #26631.
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The functions checks if the item is lacking metadata altogether. If a video or audio file was uploaded prior to 3.6, it does not have any metadata. This tries to fix it. Implements locking via a transient to protect against this running in parallel with another request.
This is the minimum viable product for #26825, but leaving the ticket open unless this function needs to be called in other places.
See #26825.
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