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Customize: Prevent absent site icon link from outputting an empty string as href in customizer; use /favicon.ico as fallback.

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An empty string causes some browsers to use the current URL as the `href`. When using `history.replaceState()` Chrome will re-fetch the favicon with each call, meaning that `customize.php` gets hit with wasted requests which tax the server.

Fixes #38377.

Built from https://develop.svn.wordpress.org/trunk@38901


git-svn-id: http://core.svn.wordpress.org/trunk@38844 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Weston Ruter 2016-10-25 04:47:29 +00:00
parent a1777db166
commit afe90360b5
4 changed files with 31 additions and 12 deletions
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11
wp-admin/js/customize-controls.js
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@ -3333,7 +3333,7 @@
* @param {object} attachment
*/
setImageFromAttachment: function( attachment ) {
var sizes = [ 'site_icon-32', 'thumbnail', 'full' ],
var sizes = [ 'site_icon-32', 'thumbnail', 'full' ], link,
icon;
_.each( sizes, function( size ) {
@ -3347,8 +3347,13 @@
// Set the Customizer setting; the callback takes care of rendering.
this.setting( attachment.id );
if ( ! icon ) {
return;
}
// Update the icon in-browser.
$( 'link[sizes="32x32"]' ).attr( 'href', icon.url );
link = $( 'link[rel="icon"][sizes="32x32"]' );
link.attr( 'href', icon.url );
},
/**
@ -3365,7 +3370,7 @@
this.params.attachment = {};
this.setting( '' );
this.renderContent(); // Not bound to setting change when emptying.
$( 'link[rel="icon"]' ).attr( 'href', '' );
$( 'link[rel="icon"][sizes="32x32"]' ).attr( 'href', '/favicon.ico' ); // Set to default.
}
});

4
wp-admin/js/customize-controls.min.js vendored
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File diff suppressed because one or more lines are too long

26
wp-includes/general-template.php
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@ -2776,12 +2776,26 @@ function wp_site_icon() {
return;
}
$meta_tags = array(
sprintf( '<link rel="icon" href="%s" sizes="32x32" />', esc_url( get_site_icon_url( 32 ) ) ),
sprintf( '<link rel="icon" href="%s" sizes="192x192" />', esc_url( get_site_icon_url( 192 ) ) ),
sprintf( '<link rel="apple-touch-icon-precomposed" href="%s" />', esc_url( get_site_icon_url( 180 ) ) ),
sprintf( '<meta name="msapplication-TileImage" content="%s" />', esc_url( get_site_icon_url( 270 ) ) ),
);
$meta_tags = array();
$icon_32 = get_site_icon_url( 32 );
if ( empty( $icon_32 ) && is_customize_preview() ) {
$icon_32 = '/favicon.ico'; // Serve default favicon URL in customizer so element can be updated for preview.
}
if ( $icon_32 ) {
$meta_tags[] = sprintf( '<link rel="icon" href="%s" sizes="32x32" />', esc_url( $icon_32 ) );
}
$icon_192 = get_site_icon_url( 192 );
if ( $icon_192 ) {
$meta_tags[] = sprintf( '<link rel="icon" href="%s" sizes="192x192" />', esc_url( $icon_192 ) );
}
$icon_180 = get_site_icon_url( 180 );
if ( $icon_180 ) {
$meta_tags[] = sprintf( '<link rel="apple-touch-icon-precomposed" href="%s" />', esc_url( $icon_180 ) );
}
$icon_270 = get_site_icon_url( 270 );
if ( $icon_270 ) {
$meta_tags[] = sprintf( '<meta name="msapplication-TileImage" content="%s" />', esc_url( $icon_270 ) );
}
/**
* Filters the site icon meta tags, so Plugins can add their own.

2
wp-includes/version.php
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@ -4,7 +4,7 @@
*
* @global string $wp_version
*/
$wp_version = '4.7-alpha-38900';
$wp_version = '4.7-alpha-38901';
/**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.