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Twenty Seventeen: Improve SVG markup, providing more options customization

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* Removes `aria-hidden` argument. Lets `aria-hidden="true"` be there by default and sets it empty when there is `title` and `desc`.
* Adds unique IDs for title and desc for accessible implementation options.
* Removes absolute path in the Customizer. It didn't work in Internet Explorer, and the original bug is fixed in #30028.
* Add whitespace around `<use>`, from #38387.

Props sami.keijonen, swissspidy, laurelfulford.

Fixes #38659.
See #38387.

Built from https://develop.svn.wordpress.org/trunk@39164


git-svn-id: http://core.svn.wordpress.org/trunk@39104 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
David A. Kennedy 2016-11-08 18:01:33 +00:00
parent 45d5d6ddb5
commit 35035be00b
2 changed files with 36 additions and 22 deletions
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56
wp-content/themes/twentyseventeen/inc/icon-functions.php
View File

@ -49,7 +49,6 @@ function twentyseventeen_get_svg( $args = array() ) {
'icon' => '',
'title' => '',
'desc' => '',
'aria_hidden' => true, // Hide from screen readers.
'fallback' => false,
);
@ -57,38 +56,53 @@ function twentyseventeen_get_svg( $args = array() ) {
$args = wp_parse_args( $args, $defaults );
// Set aria hidden.
$aria_hidden = '';
if ( true === $args['aria_hidden'] ) {
$aria_hidden = ' aria-hidden="true"';
}
$aria_hidden = ' aria-hidden="true"';
// Set ARIA.
$aria_labelledby = '';
if ( $args['title'] && $args['desc'] ) {
$aria_labelledby = ' aria-labelledby="title desc"';
/*
* Twenty Seventeen doesn't use the SVG title or description attributes; non-decorative icons are described with .screen-reader-text.
*
* However, child themes can use the title and description to add information to non-decorative SVG icons to improve accessibility.
*
* Example 1 with title: <?php echo twentyseventeen_get_svg( array( 'icon' => 'arrow-right', 'title' => __( 'This is the title', 'textdomain' ) ) ); ?>
*
* Example 2 with title and description: <?php echo twentyseventeen_get_svg( array( 'icon' => 'arrow-right', 'title' => __( 'This is the title', 'textdomain' ), 'desc' => __( 'This is the description', 'textdomain' ) ) ); ?>
*
* See https://www.paciellogroup.com/blog/2013/12/using-aria-enhance-svg-accessibility/.
*/
if ( $args['title'] ) {
$aria_hidden = '';
$unique_id = uniqid();
$aria_labelledby = ' aria-labelledby="title-' . $unique_id . '"';
if ( $args['desc'] ) {
$aria_labelledby = ' aria-labelledby="title-' . $unique_id . ' desc-' . $unique_id . '"';
}
}
// Begin SVG markup.
$svg = '<svg class="icon icon-' . esc_attr( $args['icon'] ) . '"' . $aria_hidden . $aria_labelledby . ' role="img">';
// If there is a title, display it.
// Display the title.
if ( $args['title'] ) {
$svg .= '<title>' . esc_html( $args['title'] ) . '</title>';
$svg .= '<title id="title-' . $unique_id . '">' . esc_html( $args['title'] ) . '</title>';
// Display the desc only if the title is already set.
if ( $args['desc'] ) {
$svg .= '<desc id="desc-' . $unique_id . '">' . esc_html( $args['desc'] ) . '</desc>';
}
}
// If there is a description, display it.
if ( $args['desc'] ) {
$svg .= '<desc>' . esc_html( $args['desc'] ) . '</desc>';
}
// Use absolute path in the Customizer so that icons show up in there.
if ( is_customize_preview() ) {
$svg .= '<use xlink:href="' . get_parent_theme_file_uri( '/assets/images/svg-icons.svg#icon-' . esc_html( $args['icon'] ) ) . '"></use>';
} else {
$svg .= '<use xlink:href="#icon-' . esc_html( $args['icon'] ) . '"></use>';
}
/*
* Display the icon.
*
* The whitespace around `<use>` is intentional - it is a work around to a keyboard navigation bug in Safari 10.
*
* See https://core.trac.wordpress.org/ticket/38387.
*/
$svg .= ' <use xlink:href="#icon-' . esc_html( $args['icon'] ) . '"></use> ';
// Add some markup to use as a fallback for browsers that do not support SVGs.
if ( $args['fallback'] ) {

2
wp-includes/version.php
View File

@ -4,7 +4,7 @@
*
* @global string $wp_version
*/
$wp_version = '4.7-beta2-39163';
$wp_version = '4.7-beta2-39164';
/**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.