Merge HEIC removal (PR #28) into main

.gitignore

@@ -4,3 +4,4 @@ composer.lock
 .phpunit.cache/
 .phpcs-cache
 dist/
+.phpunit.result.cache

README.md

@@ -1,12 +1,12 @@
 # Client-Side Media Experiments
 
-Enables client-side media processing on Firefox and Safari via COEP/COOP cross-origin isolation headers, and adds HEIC/HEIF upload support with automatic client-side conversion to JPEG.
+Enables client-side media processing on Firefox and Safari via COEP/COOP cross-origin isolation headers.
 
 ## Features
 
 ### Cross-Origin Isolation (COEP/COOP)
 
-WordPress 7.0 and Gutenberg include client-side media processing powered by WebAssembly (wasm-vips). This requires cross-origin isolation, which is achieved via Document-Isolation-Policy (DIP) on Chrome 137+.
+WordPress 7.1 and Gutenberg include client-side media processing powered by WebAssembly (wasm-vips). This requires cross-origin isolation, which is achieved via Document-Isolation-Policy (DIP) on Chrome 137+.
 
 However, Firefox and Safari do not yet support DIP, so client-side media processing is disabled on those browsers.
 
@@ -17,50 +17,29 @@ This plugin restores support by sending the older COEP/COOP headers on browsers
 - Adds `credentialless` attribute to iframes so they continue working under COEP.
 - Filters embed previews for providers that do not support credentialless iframes (Facebook, SmugMug).
 
-### HEIC/HEIF Upload Support
+### HEIC uploads
 
-HEIC support was removed from WordPress core's wasm-vips build due to LGPL/GPL license incompatibility. This plugin re-enables HEIC upload support by converting images client-side:
-
-- **Enabled by default** — can be toggled under **Settings → Media**.
-- HEIC/HEIF images are automatically converted to JPEG in the browser before upload.
-- Uses the [heic2any](https://github.com/alexcorvi/heic2any) library, loaded dynamically from an external CDN only when a HEIC file is detected.
-- heic2any uses [libheif](https://github.com/strukturag/libheif) (LGPL-3.0) for decoding. Since it is loaded at runtime from a CDN rather than bundled with the plugin, it is treated as a separate work and does not affect the plugin's GPL-2.0-or-later license.
+WordPress 7.1 handles HEIC/HEIF uploads in core: MIME types, file type detection, HEIC-to-JPEG output mapping, and client-side conversion via the vips WASM pipeline or a canvas-based fallback for browsers with native HEVC decoding (such as Safari). This plugin no longer ships any HEIC handling of its own.
 
 ## Requirements
 
-- WordPress 6.8+ with the Gutenberg plugin, or WordPress 7.0+.
-- The client-side media processing feature must be enabled.
+- WordPress 6.8+ with the Gutenberg plugin, or WordPress 7.1+.
+- The client-side media processing feature must be enabled (it is on by default in secure contexts).
 
 ## Installation
 
 1. Upload the `client-side-media-experiments` folder to `/wp-content/plugins/`.
 2. Activate the plugin through the **Plugins** menu in WordPress.
-3. The COEP/COOP headers activate automatically on browsers that need them. HEIC support is enabled by default.
+3. The COEP/COOP headers activate automatically on browsers that need them.
 
 ## Configuration
 
 ### Disable COEP/COOP headers
 
-```php
-add_filter( 'csme_use_coep_coop', '__return_false' );
-```
-
-### Disable HEIC support
-
-Navigate to **Settings → Media** and uncheck **HEIC Support**, or programmatically:
+Navigate to **Settings → Media** and uncheck **Enable**, or programmatically:
 
 ```php
-update_option( 'csme_heic_enabled', 0 );
-```
-
-### Self-host the HEIC conversion library
-
-Use the `csme_heic_library_url` filter to point to your own hosted copy of heic2any:
-
-```php
-add_filter( 'csme_heic_library_url', function () {
-    return 'https://example.com/heic2any.min.js';
-} );
+add_filter( 'csme_use_coep_coop', '__return_false' );
 ```
 
 ## Development
@@ -78,5 +57,3 @@ This produces `dist/client-side-media-experiments.zip` containing only the runti
 ## License
 
 This plugin is licensed under [GPL-2.0-or-later](https://www.gnu.org/licenses/gpl-2.0.html).
-
-The HEIC conversion library ([heic2any](https://github.com/alexcorvi/heic2any) / [libheif](https://github.com/strukturag/libheif)) is LGPL-3.0 licensed and loaded at runtime from an external CDN as a separate work.

client-side-media-experiments.php

@@ -2,7 +2,7 @@
 /**
  * Plugin Name: Client-Side Media Experiments
  * Plugin URI:  https://github.com/adamsilverstein/client-side-media-experiments
- * Description: Enables client-side media processing on Firefox and Safari via COEP/COOP cross-origin isolation headers, and adds HEIC/HEIF upload support with client-side conversion.
+ * Description: Enables client-side media processing on Firefox and Safari via COEP/COOP cross-origin isolation headers.
  * Version:     0.2.0
  * Requires at least: 6.8
  * Requires PHP: 7.4
@@ -46,6 +46,5 @@ function csme_init() {
 
 	require_once CSME_PLUGIN_DIR . 'includes/settings.php';
 	require_once CSME_PLUGIN_DIR . 'includes/cross-origin-isolation.php';
-	require_once CSME_PLUGIN_DIR . 'includes/heic-support.php';
 }
 add_action( 'plugins_loaded', 'csme_init' );

includes/settings.php

@@ -44,24 +44,6 @@ function csme_register_settings() {
 		'media',
 		'csme_settings_section'
 	);
-
-	register_setting(
-		'media',
-		'csme_heic_enabled',
-		array(
-			'type'              => 'integer',
-			'default'           => 1,
-			'sanitize_callback' => 'csme_sanitize_enabled',
-		)
-	);
-
-	add_settings_field(
-		'csme_heic_enabled_field',
-		__( 'HEIC Support', 'client-side-media-experiments' ),
-		'csme_heic_enabled_field_callback',
-		'media',
-		'csme_settings_section'
-	);
 }
 add_action( 'admin_init', 'csme_register_settings' );
 
@@ -96,23 +78,6 @@ function csme_enabled_field_callback() {
 	<?php
 }
 
-/**
- * Outputs the checkbox field for the HEIC enabled setting.
- */
-function csme_heic_enabled_field_callback() {
-	$enabled = get_option( 'csme_heic_enabled', 1 );
-	?>
-	<input type="hidden" name="csme_heic_enabled" value="0" />
-	<label for="csme_heic_enabled">
-		<input type="checkbox" id="csme_heic_enabled" name="csme_heic_enabled" value="1" <?php checked( $enabled, 1 ); ?> />
-		<?php esc_html_e( 'Enable HEIC/HEIF image upload support (converts to JPEG on the client side).', 'client-side-media-experiments' ); ?>
-	</label>
-	<p class="description">
-		<?php esc_html_e( 'When enabled, HEIC images are converted to JPEG in the browser using the heic2any library (which uses libheif, LGPL-3.0 licensed), loaded from an external CDN at runtime.', 'client-side-media-experiments' ); ?>
-	</p>
-	<?php
-}
-
 /**
  * Disables COEP/COOP when the setting is off.
  *