Editor: do not reuse the preview tab when the user has navigated away.
See #32588. git-svn-id: https://develop.svn.wordpress.org/trunk@32809 602fd350-edb4-49c9-b593-d223f7449a82
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@ -290,6 +290,9 @@ add_action( 'post_updated', 'wp_check_for_changed_slugs', 12, 3 );
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// Nonce check for Post Previews
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add_action( 'init', '_show_post_preview' );
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// Output JS to reset window.name for previews
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add_action( 'wp_head', 'wp_post_preview_js', 1 );
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// Timezone
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add_filter( 'pre_option_gmt_offset','wp_timezone_override_offset' );
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@ -4913,3 +4913,36 @@ function wp_delete_file( $file ) {
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@unlink( $delete );
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}
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}
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/**
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* Outputs a small JS snippet on preview tabs/windows to remove `window.name` on unload.
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* This prevents reusing the same tab for a preview when the user has navigated away.
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*
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* @since 4.3.0
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*/
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function wp_post_preview_js() {
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global $post;
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if ( ! is_preview() || empty( $post ) ) {
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return;
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}
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// Has to match the window name used in post_submit_meta_box()
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$name = 'wp-preview-' . (int) $post->ID;
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?>
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<script>
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( function() {
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var query = document.location.search;
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if ( query && query.indexOf( 'preview=true' ) !== -1 ) {
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window.name = '<?php echo $name; ?>';
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}
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if ( window.addEventListener ) {
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window.addEventListener( 'unload', function() { window.name = ''; }, false );
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}
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}());
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</script>
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<?php
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}
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