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I18N: Add JavaScript translation support.

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Adds the `wp_set_script_translations()` function which registers translations for a JavaScript file. This function takes a handle, domain and optionally a path and ensures JavaScript translation files are loaded if they exist.

Merges [43825,43828,43859,43898] from the 5.0 branch to trunk.

Props herregroen, atimmer, omarreiss, nerrad, swissspidy, ocean90, georgestephanis.
Fixes #45103, #45256.



git-svn-id: https://develop.svn.wordpress.org/trunk@44169 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Gary Pendergast
2018-12-14 05:51:31 +00:00
parent ccd35b3c02
commit 8d897837aa
9 changed files with 423 additions and 1 deletions
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68
src/wp-includes/class.wp-scripts.php
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@@ -330,6 +330,11 @@ class WP_Scripts extends WP_Dependencies {
return true;
}
$translations = $this->print_translations( $handle, false );
if ( $translations ) {
$translations = sprintf( "<script type='text/javascript'>\n%s\n</script>\n", $translations );
}
if ( ! preg_match( '|^(https?:)?//|', $src ) && ! ( $this->content_url && 0 === strpos( $src, $this->content_url ) ) ) {
$src = $this->base_url . $src;
}
@@ -345,7 +350,7 @@ class WP_Scripts extends WP_Dependencies {
return true;
}
$tag = "{$cond_before}{$before_handle}<script type='text/javascript' src='$src'></script>\n{$after_handle}{$cond_after}";
$tag = "{$translations}{$cond_before}{$before_handle}<script type='text/javascript' src='$src'></script>\n{$after_handle}{$cond_after}";
/**
* Filters the HTML script tag of an enqueued script.
@@ -490,6 +495,67 @@ class WP_Scripts extends WP_Dependencies {
return parent::set_group( $handle, $recursion, $grp );
}
/**
* Sets a translation textdomain.
*
* @since 5.0.0
*
* @param string $handle Name of the script to register a translation domain to.
* @param string $domain The textdomain.
* @param string $path Optional. The full file path to the directory containing translation files.
*
* @return bool True if the textdomain was registered, false if not.
*/
public function set_translations( $handle, $domain, $path = null ) {
if ( ! isset( $this->registered[ $handle ] ) ) {
return false;
}
/** @var \_WP_Dependency $obj */
$obj = $this->registered[ $handle ];
if ( ! in_array( 'wp-i18n', $obj->deps, true ) ) {
$obj->deps[] = 'wp-i18n';
}
return $obj->set_translations( $domain, $path );
}
/**
* Prints translations set for a specific handle.
*
* @since 5.0.0
*
* @param string $handle Name of the script to add the inline script to. Must be lowercase.
* @param bool $echo Optional. Whether to echo the script instead of just returning it.
* Default true.
* @return string|false Script on success, false otherwise.
*/
public function print_translations( $handle, $echo = true ) {
if ( ! isset( $this->registered[ $handle ] ) || empty( $this->registered[ $handle ]->textdomain ) ) {
return false;
}
$domain = $this->registered[ $handle ]->textdomain;
$path = $this->registered[ $handle ]->translations_path;
$json_translations = load_script_textdomain( $handle, $domain, $path );
if ( ! $json_translations ) {
// Register empty locale data object to ensure the domain still exists.
$json_translations = '{ "locale_data": { "messages": { "": {} } } }';
}
$output = '(function( translations ){' .
'wp.i18n.setLocaleData( translations.locale_data, "' . $domain . '" );' .
'})(' . $json_translations . ');';
if ( $echo ) {
printf( "<script type='text/javascript'>\n%s\n</script>\n", $output );
}
return $output;
}
/**
* Determines script dependencies.
*