Commit Graph

825 Commits

Author SHA1 Message Date
antpb
0c5a3fa2ed Media: Make adjacent_image_link() include alt text when returning an image.
When using the `adjacent_image_link()` function there is a condition that will return a linked image. Previously, the returned image was sent without alt attributes.

Now, `adjacent_image_link()` will include alt attributes of the image's title when an image is returned.

Props joedolson, Mista-Flo, sabernhardt.
Fixes #52387.

Built from https://develop.svn.wordpress.org/trunk@50274


git-svn-id: http://core.svn.wordpress.org/trunk@49919 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2021-02-09 17:27:05 +00:00
Sergey Biryukov
8bc5c10684 Docs: Clarify the @return value for wp_get_attachment_image_url() and get_the_post_thumbnail_url().
Props GeekPress, audrasjb, naveen17797.
Fixes #52183.
Built from https://develop.svn.wordpress.org/trunk@50236


git-svn-id: http://core.svn.wordpress.org/trunk@49897 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2021-02-08 14:14:08 +00:00
antpb
b566631d5e Media: Consistency in logic to pass wp_getimagesize() tests.
Previously, we used `DIR_TESTDATA` to determine if a test should skip a newly silenced error in `wp_getimagesize()`.

We are now using `WP_RUN_CORE_TESTS` instead for consistency.

Props hellofromTonya, SergeyBiryukov.
See #49889.

Built from https://develop.svn.wordpress.org/trunk@50170


git-svn-id: http://core.svn.wordpress.org/trunk@49849 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2021-02-02 21:36:03 +00:00
desrosj
230c1c5c8a Coding Standards: Fix several minor coding standards issues.
These are made by running `composer format`.

Follow up to [50124], [50129], [50143].

See #49961, #52192, #34281.
Built from https://develop.svn.wordpress.org/trunk@50152


git-svn-id: http://core.svn.wordpress.org/trunk@49831 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2021-02-02 18:04:03 +00:00
Sergey Biryukov
aab7206ff8 Media: Move wp_getimagesize() to wp-includes/media.php, for consistency with other media functions.
Follow-up to [50146].

See #49889.
Built from https://develop.svn.wordpress.org/trunk@50148


git-svn-id: http://core.svn.wordpress.org/trunk@49827 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2021-02-02 17:10:04 +00:00
antpb
f80e5d0919 Media: Avoid suppressing errors when using getimagesize().
Previously, all logic utilizing `getimagesize()` was supressing errors making it difficult to debug usage of the function. 

A new `wp_getimagesize()` function has been added to allow the errors to no longer be suppressed when `WP_DEBUG` is enabled.

Props Howdy_McGee, SergeyBiryukov, mukesh27, davidbaumwald, noisysocks, hellofromTonya.
Fixes #49889.

Built from https://develop.svn.wordpress.org/trunk@50146


git-svn-id: http://core.svn.wordpress.org/trunk@49825 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2021-02-02 16:53:04 +00:00
Joe McGill
373ee89c83 Media: Make filename checks less strict in 'wp_image_src_get_dimensions'.
This modifies the check for full size files so that only the basename is compared with the image `src` to avoid misses whenever the `src` path has been modified.

Props ianmjones.
Fixes: #52417.

Built from https://develop.svn.wordpress.org/trunk@50144


git-svn-id: http://core.svn.wordpress.org/trunk@49823 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2021-02-02 15:28:04 +00:00
Joe McGill
2642a446b3 Media: Sanity check image meta in 'wp_image_src_get_dimensions'.
This fixes a potential illegal offset error introduced in [50134] if the `$image_meta` doesn't include a `file` key.
    
Props dd32.
Fixes #51865.

Built from https://develop.svn.wordpress.org/trunk@50136


git-svn-id: http://core.svn.wordpress.org/trunk@49815 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2021-02-02 04:27:06 +00:00
Joe McGill
5ca780edb1 Media: Add filter to wp_image_src_get_dimensions.
This adds a new filter, `wp_image_src_get_dimensions` to the `wp_image_src_get_dimensions()` function to correct the dimensions returned for a file whenever WordPress isn't able to correctly get the dimensions from attachment metadata.

Fixes #51865.

Built from https://develop.svn.wordpress.org/trunk@50134


git-svn-id: http://core.svn.wordpress.org/trunk@49813 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2021-02-02 02:59:05 +00:00
Sergey Biryukov
489e47692a Media: Use consistent method for instantiating an attachment author object in Media Library.
Previously, attachments without an author could cause a PHP fatal error due to calling the `::exists()` method on a `false` value.

Props antpb, carloscastilloadhoc, hellofromTonya, garrett-eclipse.
Fixes #52030.
Built from https://develop.svn.wordpress.org/trunk@49979


git-svn-id: http://core.svn.wordpress.org/trunk@49680 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2021-01-18 12:55:07 +00:00
John Blackbourn
b59c0f307b Docs: Corrections and improvements to types used in various docblocks.
See #51800, #52217

Built from https://develop.svn.wordpress.org/trunk@49936


git-svn-id: http://core.svn.wordpress.org/trunk@49635 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2021-01-05 17:16:11 +00:00
John Blackbourn
dfe1f9b322 Docs: Promote many bool types to true or false where only that value is used.
See #51800

Built from https://develop.svn.wordpress.org/trunk@49927


git-svn-id: http://core.svn.wordpress.org/trunk@49626 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2021-01-03 22:04:04 +00:00
Felix Arntz
bb234abee7 Media: Enable lazy-loading of iframes by adding the loading="lazy" attribute to iframe tags on the front-end.
* Expands the capabilities of `wp_filter_content_tags()` to add the attribute to iframe tags if enabled.
* Modifies the default behavior of `wp_lazy_loading_enabled()` so that it returns `true` for `iframe` tags.
* Introduces a `wp_iframe_tag_add_loading_attr()` function.
* Introduces a `wp_iframe_tag_add_loading_attr` filter.

Like for images, the attribute is only added to iframes which have both `width` and `height` specified (see related #50367).

Props azaozz, flixos90, westonruter.
Fixes #50756.

Built from https://develop.svn.wordpress.org/trunk@49808


git-svn-id: http://core.svn.wordpress.org/trunk@49531 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-12-16 21:19:07 +00:00
Sergey Biryukov
52d2b07600 Docs: Fix typo in references to WP_Error in some DocBlocks.
See #51800.
Built from https://develop.svn.wordpress.org/trunk@49769


git-svn-id: http://core.svn.wordpress.org/trunk@49492 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-12-08 11:51:05 +00:00
iandunn
77236320d3 Media: Return WP_Error when cropping with bad input to avoid fatal.
This avoids an error on PHP 8 caused by calling `wp_imagecreatetruecolor()` with inputs that aren't numeric, or are less than 0.

Props hellofromtonya, Boniu91, metalandcoffee, SergeyBiryukov.
Fixes #51937.

Built from https://develop.svn.wordpress.org/trunk@49751


git-svn-id: http://core.svn.wordpress.org/trunk@49474 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-12-04 21:41:06 +00:00
Helen Hou-Sandí
ee48cca207 Media: Avoid fatal error in `wp_prepare_attachment_for_js().
In certain contexts, in particular on the front-end, `get_media_states()` is not availble.

Props rebasaurus.
Fixes #51791.

Built from https://develop.svn.wordpress.org/trunk@49613


git-svn-id: http://core.svn.wordpress.org/trunk@49351 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-11-16 19:20:09 +00:00
John Blackbourn
170ca32007 Docs: Various docblock corrections and improvements.
See #50768

Built from https://develop.svn.wordpress.org/trunk@49597


git-svn-id: http://core.svn.wordpress.org/trunk@49335 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-11-14 16:35:06 +00:00
Sergey Biryukov
a2d42351c5 Text Changes: Unify various "Back to..." vs. "Return to..." vs. "Go to..." strings.
Standardize on "Go to..." as a more appropriate option for most cases.

Props garrett-eclipse, kharisblank, audrasjb, ramiy, valentinbora.
Fixes #47235.
Built from https://develop.svn.wordpress.org/trunk@49539


git-svn-id: http://core.svn.wordpress.org/trunk@49277 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-11-09 10:53:10 +00:00
Sergey Biryukov
0a70f9b004 Docs: Document the return value of wp_prepare_attachment_for_js() using hash notation.
Props stevenlinx, Mista-Flo, johnbillion.
Fixes #50835.
Built from https://develop.svn.wordpress.org/trunk@49281


git-svn-id: http://core.svn.wordpress.org/trunk@49041 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-10-23 00:43:07 +00:00
Sergey Biryukov
e856a91321 Media: Introduce a filter for wp_get_attachment_image() HTML output.
Props prionkor, antpb, donmhico, audrasjb, Mista-Flo, hellofromTonya.
Fixes #50801.
Built from https://develop.svn.wordpress.org/trunk@49234


git-svn-id: http://core.svn.wordpress.org/trunk@48996 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-10-20 15:31:06 +00:00
Helen Hou-Sandí
edb64a3d8e Media: Indicate if item is or was used as a site option in the details modal.
Props Mista-Flo, melchoyce.
Fixes #42063.

Built from https://develop.svn.wordpress.org/trunk@49223


git-svn-id: http://core.svn.wordpress.org/trunk@48985 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-10-20 03:14:06 +00:00
Sergey Biryukov
e209e00734 Coding Standards: Fix WPCS issues in [49207].
See #46866.
Built from https://develop.svn.wordpress.org/trunk@49209


git-svn-id: http://core.svn.wordpress.org/trunk@48971 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-10-19 20:45:06 +00:00
antpb
9556c08b35 Media: Add 'Uploaded to' for individual media items in the media editor.
Adds a link in the media editor showing which post a media item was uploaded to.
Props karmatosed, garrett-eclipse, Mista-Flo, SergeyBiryukov, joemcgill, hellofromTonya.
Fixes #46866.

Built from https://develop.svn.wordpress.org/trunk@49207


git-svn-id: http://core.svn.wordpress.org/trunk@48969 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-10-19 20:29:05 +00:00
Sergey Biryukov
0e3147c40e Coding Standards: Replace alias PHP functions with the canonical names.
Using the canonical function name for PHP functions is strongly recommended, as aliases may be deprecated or removed without (much) warning.

This replaces all uses of the following:
* `join()` with `implode()`
* `sizeof()` with `count()`
* `is_writeable()` with `is_writable()`
* `doubleval()` with a `(float)` cast

In part, this is a follow-up to #47746.

Props jrf.
See #50767.
Built from https://develop.svn.wordpress.org/trunk@49193


git-svn-id: http://core.svn.wordpress.org/trunk@48955 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-10-18 17:27:06 +00:00
John Blackbourn
33070fb7d2 Media: Allow the gallery_shortcode() and get_image_tag() functions to correctly accept an array of image dimensions.
These functions did previously accept an array of image dimensions but their class attributes were not properly constructed.

Fixes #51362

Built from https://develop.svn.wordpress.org/trunk@49128


git-svn-id: http://core.svn.wordpress.org/trunk@48890 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-10-11 20:01:06 +00:00
Sergey Biryukov
897f004a9c General: Replace older-style PHP type conversion functions with type casts.
This improves performance, readability, and consistency throughout core.

* `intval()` → `(int)`
* `strval()` → `(string)`
* `floatval()` → `(float)`

Props ayeshrajans.
Fixes #42918.
Built from https://develop.svn.wordpress.org/trunk@49108


git-svn-id: http://core.svn.wordpress.org/trunk@48870 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-10-08 21:15:13 +00:00
John Blackbourn
aba2165aae Media: Standardise the description for image size parameters.
This brings continuity to all the image related functions and filters which accept or pass a size parameter.

Props dilipbheda, johnbillion

Fixes #47364

Built from https://develop.svn.wordpress.org/trunk@49021


git-svn-id: http://core.svn.wordpress.org/trunk@48783 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-09-20 16:23:07 +00:00
John Blackbourn
0b2e31a7f8 Docs: Inline documentation improvements for media related functions and hooks.
See #47364, #50768

Built from https://develop.svn.wordpress.org/trunk@49020


git-svn-id: http://core.svn.wordpress.org/trunk@48782 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-09-20 15:55:10 +00:00
John Blackbourn
ecfff6fe80 Media: Correct the image thumbnail logic in media templates.
This ensures the correct data properties are checked before displaying image thumbnails.

Props chetan200891

Fixes #49655

Built from https://develop.svn.wordpress.org/trunk@49012


git-svn-id: http://core.svn.wordpress.org/trunk@48774 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-09-20 13:15:04 +00:00
Sergey Biryukov
af523447f4 Media: Make the is_gd_image() function available on front end.
This avoids a fatal error if a plugin calls image creation or editing functions like `wp_imagecreatetruecolor()` outside of the admin.

Follow-up to [48798]

Props BackuPs.
Fixes #51174. See #50833.
Built from https://develop.svn.wordpress.org/trunk@48905


git-svn-id: http://core.svn.wordpress.org/trunk@48667 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-08-28 16:45:06 +00:00
Sergey Biryukov
0c8644c071 Docs: Improve documentation for wp_lazy_loading_enabled() per the documentation standards.
See #50768.
Built from https://develop.svn.wordpress.org/trunk@48855


git-svn-id: http://core.svn.wordpress.org/trunk@48617 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-08-24 22:16:06 +00:00
Sergey Biryukov
c3a7d6c379 Docs: Add a @since note about the $srcset and $sizes attributes added to wp_get_attachment_image().
Follow-up to [34855].

See #51122.
Built from https://develop.svn.wordpress.org/trunk@48853


git-svn-id: http://core.svn.wordpress.org/trunk@48615 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-08-24 22:12:03 +00:00
Sergey Biryukov
147ed6ebdb Docs: Add documentation and a @since note about the loading attribute added to wp_get_attachment_image().
Follow-up to [48272].

Props audrasjb.
Fixes #51122.
Built from https://develop.svn.wordpress.org/trunk@48852


git-svn-id: http://core.svn.wordpress.org/trunk@48614 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-08-24 22:04:04 +00:00
Sergey Biryukov
12c8f0e678 Code Modernization: Introduce is_gd_image() to check for PHP 8 GdImage object instances.
In PHP 8, the GD extension uses `GdImage` objects instead of resources for its underlying data structures.

This updates the existing `is_resource()` calls for image resources in core to accomodate for `GdImage` instances as well.

Props ayeshrajans, jrf.
Fixes #50833.
Built from https://develop.svn.wordpress.org/trunk@48798


git-svn-id: http://core.svn.wordpress.org/trunk@48560 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-08-16 13:33:09 +00:00
Sergey Biryukov
1f85e7484f Docs: Consistently use third-person singular verbs for various filter descriptions, per the documentation standards.
See #50768.
Built from https://develop.svn.wordpress.org/trunk@48782


git-svn-id: http://core.svn.wordpress.org/trunk@48544 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-08-11 00:34:08 +00:00
Sergey Biryukov
b1c6077591 Media: Remove extra space from the width attribute in wp_playlist_shortcode() output.
Props hvar.
Fixes #50840.
Built from https://develop.svn.wordpress.org/trunk@48716


git-svn-id: http://core.svn.wordpress.org/trunk@48478 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-08-04 12:47:06 +00:00
Sergey Biryukov
5d21bc9386 Docs: Correct description for wp_filter_content_tags() per the documentation standards.
DocBlocks should start with a brief, one sentence explanation of the purpose of the function spanning a maximum of two lines.

Follow-up to [48648].

See #44427.
Built from https://develop.svn.wordpress.org/trunk@48649


git-svn-id: http://core.svn.wordpress.org/trunk@48411 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-07-27 21:49:04 +00:00
Andrew Ozz
000086828f Media: Improve inline docs for wp_filter_content_tags().
Props johnstonphilip.
See #44427.
Built from https://develop.svn.wordpress.org/trunk@48648


git-svn-id: http://core.svn.wordpress.org/trunk@48410 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-07-27 21:06:03 +00:00
Sergey Biryukov
703a978a77 Administration: Capitalize Trash consistently in various messages.
When used as a noun referring to the "virtual" place, `Trash` should be capitalized.

Follow-up to [47233], [48352].

See #45317, #40244.
Built from https://develop.svn.wordpress.org/trunk@48594


git-svn-id: http://core.svn.wordpress.org/trunk@48356 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-07-24 00:21:03 +00:00
Sergey Biryukov
3061a680a9 Media: Pass the attachment ID to the wp_image_file_matches_image_meta filter.
Props spacedmonkey.
Fixes #50722.
Built from https://develop.svn.wordpress.org/trunk@48547


git-svn-id: http://core.svn.wordpress.org/trunk@48309 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-07-21 16:55:08 +00:00
whyisjake
69aaab5108 Feeds: Ensure that galleries can be output as a list of links in feeds.
Adjusts the gallery shortcode handler to check for the `link` attribute when outputting to a feed.

Fixes #22101.

Props ifrins, mdgl, SergeyBiryukov, chriscct7, stevenkword, iworks, DrewAPicture, birgire, whyisjake.

Built from https://develop.svn.wordpress.org/trunk@48496


git-svn-id: http://core.svn.wordpress.org/trunk@48258 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-07-16 21:31:03 +00:00
Andrew Ozz
618c32686e Media: Fix wp_image_file_matches_image_meta() to also match when the original image URL is used.
Also refreshes and fixes some of the unit tests for media, and replaces test-image-large.png with test-image-large.jpg which is larger to allow testing of `original_image` in the image meta.

Fixes #50628.


Built from https://develop.svn.wordpress.org/trunk@48454


git-svn-id: http://core.svn.wordpress.org/trunk@48223 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-07-12 21:20:03 +00:00
Andrew Ozz
af35cbeee8 Media: Tiny logic fix in wp_image_file_matches_image_meta() after [48329]. No need to look in sizes if the full size image path/URL matches.
See #50543.
Built from https://develop.svn.wordpress.org/trunk@48430


git-svn-id: http://core.svn.wordpress.org/trunk@48199 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-07-10 23:06:04 +00:00
whyisjake
81b809e3d6 Administration: Move more table strings to sentence casing.
WordPress as a project has moved largely to sentence casing for UI elements in the admin. This commit moves several string$

* Move to trash
* Mark as spam
* Permanently delete comment
* Approve comment
* In response to
* Bulk actions
* Not spam
* Sumitted on
* Delete permanently
* Add media
* Upload files
* Upload images
* Add media
* Bulk select
* Restore from trash
* Search media
* Attachment details
* Create gallery
* Edit gallery
* Cancel gallery
* Add to gallery
* Image details
* Replace image
* Cancel edit
* Edit image
* Choose image
* Select and crop
* Skip cropping
* Crop image
* Audio details
* Replace audio
* Add audio source
* Video details
* Replace video
* Add video source
* Select poster image
* Add subtitles
* Create audio playlist
* Edit audio playlist.
* Cancel audio playlist
* Create video playlist
* Edit video playlist
* Add to video playlist
* Filter media


Fixes #40244.
Props afercia, bhargavbhandari90, rcutmore, webzunft, manojlovic, jeremyfelt, desrosj, lschuyler, SergeyBiryukov, whyisjake. 


Built from https://develop.svn.wordpress.org/trunk@48352


git-svn-id: http://core.svn.wordpress.org/trunk@48121 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-07-06 21:52:21 +00:00
desrosj
ef0881750c Docs: Correct typo introduced in [48288].
See #42775.
Built from https://develop.svn.wordpress.org/trunk@48343


git-svn-id: http://core.svn.wordpress.org/trunk@48112 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-07-06 19:10:02 +00:00
Andrew Ozz
08dbc4c3bb Media:
- Introduce `wp_image_file_matches_image_meta()` utility function to check whether the image meta (retrieved by attachment ID) matches an image path or URI. A mismatch may happen in some cases, for example after the posts have been exported from one website and imported in another.
- Add unit tests for the new function.
- Improve `wp_image_src_get_dimensions()` a bit and use the new function to prevent these edge cases.

Fixes #50543.
Built from https://develop.svn.wordpress.org/trunk@48329


git-svn-id: http://core.svn.wordpress.org/trunk@48098 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-07-05 23:32:03 +00:00
Andrew Ozz
86317e3e85 Media: Show an error message when a .heic file is uploaded that this type of files cannot be displayed in a web browser and suggesting to convert to JPEG. The message is shown by using filters, plugins that want to handle uploading of .heic files can remove it.
Props mattheweppelsheimer, mikeschroder, jeffr0, andraganescu, desrosj, azaozz.
Fixes #42775.
Built from https://develop.svn.wordpress.org/trunk@48288


git-svn-id: http://core.svn.wordpress.org/trunk@48057 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-07-03 23:15:03 +00:00
Sergey Biryukov
ec571bdcf6 Docs: Spell "falsey" in a consistent way.
See #49572.
Built from https://develop.svn.wordpress.org/trunk@48275


git-svn-id: http://core.svn.wordpress.org/trunk@48044 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-07-02 11:30:02 +00:00
Felix Arntz
1d010a49c7 Media: Improve support for opting out of lazy-loading for template images.
With this changeset, in addition to the already present `wp_lazy_loading_enabled` filter, developers can now opt out of lazy-loading template images via `wp_get_attachment_image()` by passing a `loading` attribute with boolean value `false`. This can be used e.g. by theme developers on images which are very likely to be in the initial viewport.

This changeset also improves related test coverage.

Props adamsilverstein, azaozz, joemcgill, johnbillion.
See #50425, #44427.

Built from https://develop.svn.wordpress.org/trunk@48272


git-svn-id: http://core.svn.wordpress.org/trunk@48041 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-07-02 02:03:03 +00:00
Felix Arntz
70c8bd2333 Media: Only add loading attribute to img tags using double quotes.
Props azaozz.
Fixes #50367.

Built from https://develop.svn.wordpress.org/trunk@48239


git-svn-id: http://core.svn.wordpress.org/trunk@48008 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-06-30 20:34:06 +00:00