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Customize: Introduce custom CSS for extending theme styles.

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* Custom CSS is associated with a given theme and is displayed in an inline `style` element at the `wp_head` hook after the `wp_print_styles` is called so that it overrides any enqueued stylesheets.
* A `wp_get_custom_css()` function is used for accessing the CSS associated with the current theme (or another theme) and a `wp_get_custom_css` filter for manipulating it.
* CSS is managed in customizer via a new "Additional CSS" section with a single `textarea` control. 
* `WP_Customize_Section::$description_hidden` is introduced for hiding extended descriptions in customizer sections behind a help toggle as done with panels.
* CSS is stored in a `custom_css` post type with the theme (stylesheet) slug as the `post_name`.
* `WP_Customize_Custom_CSS_Setting` is introduced to handle validation of CSS, previewing, and persisting the CSS to the `custom_css` post type.
* The `custom_css` setting is tied to a new `unfiltered_css` capability which maps to `unfiltered_html` by default.
* Escaping the message in the notification template is removed to allow markup (`code` tags) to be rendered.

See https://make.wordpress.org/core/2016/10/11/feature-proposal-better-theme-customizations-via-custom-css-with-live-previews/

Props johnregan3, celloexpressions, folletto, westonruter.
Fixes #35395.

Built from https://develop.svn.wordpress.org/trunk@38829


git-svn-id: http://core.svn.wordpress.org/trunk@38772 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Weston Ruter
2016-10-19 18:15:31 +00:00
parent ec5782bed5
commit 1ccd9e7a6c
16 changed files with 692 additions and 19 deletions
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29
wp-includes/class-wp-customize-section.php
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@@ -145,6 +145,18 @@ class WP_Customize_Section {
*/
public $active_callback = '';
/**
* Show the description or hide it behind the help icon.
*
* @since 4.7.0
* @access public
*
* @var bool Indicates whether the Section's description should be
* hidden behind a help icon ("?") in the Section header,
* similar to how help icons are displayed on Panels.
*/
public $description_hidden = false;
/**
* Constructor.
*
@@ -223,7 +235,7 @@ class WP_Customize_Section {
* @return array The array to be exported to the client as JSON.
*/
public function json() {
$array = wp_array_slice_assoc( (array) $this, array( 'id', 'description', 'priority', 'panel', 'type' ) );
$array = wp_array_slice_assoc( (array) $this, array( 'id', 'description', 'priority', 'panel', 'type', 'description_hidden' ) );
$array['title'] = html_entity_decode( $this->title, ENT_QUOTES, get_bloginfo( 'charset' ) );
$array['content'] = $this->get_content();
$array['active'] = $this->active();
@@ -324,11 +336,11 @@ class WP_Customize_Section {
* @see WP_Customize_Manager::render_template()
*/
public function print_template() {
?>
?>
<script type="text/html" id="tmpl-customize-section-<?php echo $this->type; ?>">
<?php $this->render_template(); ?>
</script>
<?php
<?php
}
/**
@@ -350,7 +362,7 @@ class WP_Customize_Section {
<span class="screen-reader-text"><?php _e( 'Press return or enter to open this section' ); ?></span>
</h3>
<ul class="accordion-section-content">
<li class="customize-section-description-container">
<li class="customize-section-description-container section-meta <# if ( data.description_hidden ) { #>customize-info<# } #>">
<div class="customize-section-title">
<button class="customize-section-back" tabindex="-1">
<span class="screen-reader-text"><?php _e( 'Back' ); ?></span>
@@ -361,8 +373,15 @@ class WP_Customize_Section {
</span>
{{ data.title }}
</h3>
<# if ( data.description && data.description_hidden ) { #>
<button type="button" class="customize-help-toggle dashicons dashicons-editor-help" aria-expanded="false"><span class="screen-reader-text"><?php _e( 'Help' ); ?></span></button>
<div class="description customize-section-description">
{{{ data.description }}}
</div>
<# } #>
</div>
<# if ( data.description ) { #>
<# if ( data.description && ! data.description_hidden ) { #>
<div class="description customize-section-description">
{{{ data.description }}}
</div>