wordpress-theme-aksrt/inc/modules/widget-areas.php

<?php
/**
 * Widget placement and area filtering.
 *
 * @package AKSRT
 */

defined('ABSPATH') || exit;

function aksrt_widget_sidebar_area_ids(): array {
	return ['home_sidebar', 'sidebar-article', 'all_sidebar_top', 'all_sidebar_bottom', 'cat_sidebar', 'tag_sidebar', 'search_sidebar'];
}

function aksrt_widget_archive_area_ids(): array {
	return ['cat_top_fluid', 'cat_top_content', 'cat_bottom_content', 'cat_bottom_fluid', 'cat_sidebar', 'tag_top_fluid', 'tag_top_content', 'tag_bottom_content', 'tag_bottom_fluid', 'tag_sidebar', 'search_top_fluid', 'search_top_content', 'search_bottom_content', 'search_bottom_fluid', 'search_sidebar'];
}

function aksrt_widget_homepage_area_ids(): array {
	return ['home_top_fluid', 'home_top_content', 'home_bottom_content', 'home_bottom_fluid'];
}

function aksrt_widget_single_area_ids(): array {
	return ['single_top_fluid', 'single_top_content', 'single_bottom_content', 'single_bottom_fluid'];
}

function aksrt_widget_base_from_id(string $widget_id): string {
	return preg_replace('/-\d+$/', '', $widget_id) ?: $widget_id;
}

function aksrt_widget_allowed_sidebars(string $widget_base_id): array {
	$sidebar_only = ['aksrt_categories', 'aksrt_tag_cloud', 'aksrt_hot_posts'];
	$homepage_only = ['aksrt_category_recommend'];
	$hybrid = ['aksrt_tab_posts', 'aksrt_category_block', 'aksrt_category_tabs'];

	if (in_array($widget_base_id, $sidebar_only, true)) {
		return aksrt_widget_sidebar_area_ids();
	}
	if (in_array($widget_base_id, $homepage_only, true)) {
		return aksrt_widget_homepage_area_ids();
	}
	if (in_array($widget_base_id, $hybrid, true)) {
		return array_values(array_unique(array_merge(aksrt_widget_sidebar_area_ids(), aksrt_widget_homepage_area_ids())));
	}
	if ($widget_base_id === 'aksrt_post_pay_box') {
		return ['sidebar-article'];
	}
	return [];
}

function aksrt_widget_is_allowed_in_sidebar(string $widget_base_id, string $sidebar_id): bool {
	if ($widget_base_id === '' || $sidebar_id === '') {
		return true;
	}
	if ($sidebar_id === 'wp_inactive_widgets' || strpos($sidebar_id, 'orphaned_widgets') === 0) {
		return true;
	}
	$allowed = aksrt_widget_allowed_sidebars($widget_base_id);
	return empty($allowed) || in_array($sidebar_id, $allowed, true);
}

function aksrt_widget_get_area_context(array $args): string {
	$sidebar_id = isset($args['id']) ? (string) $args['id'] : '';
	if (in_array($sidebar_id, aksrt_widget_sidebar_area_ids(), true)) {
		return 'sidebar';
	}
	if (in_array($sidebar_id, aksrt_widget_homepage_area_ids(), true)) {
		return 'homepage';
	}
	if (in_array($sidebar_id, aksrt_widget_archive_area_ids(), true)) {
		return 'archive';
	}
	if (in_array($sidebar_id, aksrt_widget_single_area_ids(), true)) {
		return 'single';
	}
	return 'other';
}

function aksrt_widget_render_location_help(string $scope): void {
	$messages = [
		'sidebar'  => __('仅限侧栏区域：首页侧栏、文章页侧边栏、全站侧栏、分类/标签/搜索侧栏。', 'aksrt'),
		'homepage' => __('仅限首页挂载区域：首页顶部/底部全宽、首页内容上方/下方。', 'aksrt'),
		'hybrid'   => __('支持侧栏、首页和归档页挂载区域。', 'aksrt'),
		'archive'  => __('仅限归档页挂载区域：分类页、标签页、搜索页的顶部/底部/侧栏。', 'aksrt'),
	];
	if (empty($messages[$scope])) {
		return;
	}
	printf('<p style="margin-top:10px;font-size:12px;color:#666;">%s</p>', esc_html($messages[$scope]));
}

function aksrt_filter_widget_display_by_area($instance, WP_Widget $widget, array $args) {
	if ($instance === false) {
		return false;
	}
	$sidebar_id = isset($args['id']) ? (string) $args['id'] : '';
	$widget_base_id = isset($widget->id_base) ? (string) $widget->id_base : '';
	return aksrt_widget_is_allowed_in_sidebar($widget_base_id, $sidebar_id) ? $instance : false;
}
add_filter('widget_display_callback', 'aksrt_filter_widget_display_by_area', 10, 3);

function aksrt_filter_widget_sidebar_assignments($new_value, $old_value) {
	if (!is_array($new_value)) {
		return $new_value;
	}
	$removed = [];
	foreach ($new_value as $sidebar_id => $widget_ids) {
		if (!is_array($widget_ids) || $sidebar_id === 'wp_inactive_widgets') {
			continue;
		}
		$filtered = [];
		foreach ($widget_ids as $widget_id) {
			if (!is_string($widget_id) || $widget_id === '') {
				continue;
			}
			$widget_base_id = aksrt_widget_base_from_id($widget_id);
			if (aksrt_widget_is_allowed_in_sidebar($widget_base_id, (string) $sidebar_id)) {
				$filtered[] = $widget_id;
			} else {
				$removed[] = $widget_id;
			}
		}
		$new_value[$sidebar_id] = array_values($filtered);
	}
	if (empty($removed)) {
		return $new_value;
	}
	if (!isset($new_value['wp_inactive_widgets']) || !is_array($new_value['wp_inactive_widgets'])) {
		$new_value['wp_inactive_widgets'] = [];
	}
	$assigned = [];
	foreach ($new_value as $widget_ids) {
		if (!is_array($widget_ids)) {
			continue;
		}
		foreach ($widget_ids as $widget_id) {
			if (is_string($widget_id) && $widget_id !== '') {
				$assigned[$widget_id] = true;
			}
		}
	}
	foreach (array_values(array_unique($removed)) as $widget_id) {
		if (!isset($assigned[$widget_id]) && !in_array($widget_id, $new_value['wp_inactive_widgets'], true)) {
			$new_value['wp_inactive_widgets'][] = $widget_id;
		}
	}
	return $new_value;
}
add_filter('pre_update_option_sidebars_widgets', 'aksrt_filter_widget_sidebar_assignments', 10, 2);