['title'=>'单独设置', 'type'=>'checkbox', 'value'=>1, 'label'=>'文章列表和编辑页面可以单独设置是否显示文章目录以及显示到第几级。'],
'depth' => ['title'=>'显示层级', 'type'=>'select', 'value'=>6, 'options'=> wpjam_fill(range(2, 6), fn($v)=> 'H'.$v)],
'position' => ['title'=>'显示位置', 'type'=>'select', 'value'=>'content', 'options'=>['content'=>'显示在文章内容前面', 'shortcode'=>'使用[toc]插入内容中', 'function'=>'显示在侧边栏/调用函数wpjam_get_toc()显示']],
]+(current_theme_supports('style', 'toc') ? [] : [
'css' => ['title'=>'显示样式', 'type'=>'textarea', 'description'=>'也可以将相关的样式代码复制主题的对应文件中，点击这里获取文章目录的默认的 CSS']
]);
}
public static function output($wrap=true){
$toc = is_singular() ? (string)self::get_arg('toc') : '';
return $toc && $wrap ? ''."\n".'文章目录
'."\n".$toc.' '."\n" : $toc;
}
public static function filter_content($content){
$depth = self::get_setting('individual', 1) ? (int)get_post_meta(get_the_ID(), 'toc_depth', true) : 0;
$depth = $depth ?: self::get_setting('depth', 6);
if($depth && $depth != -1){
$i = 0;
$stack = [];
$output = $toc = '';
$index = str_contains($content, '[toc]');
$tag = $index ? 'ol' : 'ul';
$parts = preg_split('#(]*)>(.*?))#is', $content, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
while($i < count($parts)){
$part = $parts[$i];
if(str_starts_with($part, '= 1 && $part[2] <= $depth){
$level = (int)$parts[$i+1];
$attr = $parts[$i+2] ? shortcode_parse_atts($parts[$i+2]) : [];
if(!str_contains($attr['class'] ?? '', 'toc-noindex')){
if(empty($attr['id'])){
$attr['id'] = 'toc_'.($i+1);
}
if($stack){
if($level > array_last($stack)){
$toc .= "\n<".$tag.">\n";
$output .= $index ? ''."\n" : '';
}else{
while($level <= array_last($stack)){
$toc .= "\n";
if($level < array_pop($stack)){
$toc .= "\n";
$output .= $index ? "\n" : '';
}
}
}
}
$stack[] = $level;
$toc .= ''.trim(strip_tags($parts[$i+3])).'';
}
$output .= wpjam_tag('h'.$level, $attr, $parts[$i+3]);
$i += 4;
}else{
$output .= $part;
$i += 1;
}
}
if($stack){
$content = implode([
!$index && self::get_setting('position', 'content') == 'content' ? '[toc]' : '',
$output,
$index ? str_repeat("\n", count($stack)-1) : ''
]);
self::update_arg('toc', "<".$tag.">\n".$toc.str_repeat("\n\n", count($stack)));
}
}
return str_replace('[toc]', self::output(), $content);
}
public static function add_hooks(){
wpjam_register_widget('wpjam-toc', 'WPJAM - 文章目录', [
'classname' => 'widget_toc',
'fields' => ['title' => ['type'=>'text', 'before'=>'列表标题：', 'class'=>'medium-text']],
'widget' => fn()=> self::output(false)
]);
wpjam_once('maybe', 'the_content', fn($content)=> !doing_filter('get_the_excerpt') && wpjam_is('single', get_the_ID()) ? self::filter_content($content) : null, 11);
if($css = self::get_setting('css')){
wpjam_hook('wp_head', fn()=> is_singular() && !current_theme_supports('style', 'toc') && wpjam_echo(''));
}
self::get_setting('individual', 1) && wpjam_register_post_option('wpjam-toc', [
'title' => '文章目录',
'context' => 'side',
'list_table' => true,
'post_type' => fn($type)=> is_post_type_viewable($type) && post_type_supports($type, 'editor'),
'fields' => ['toc_depth' => [
'title' => '层级：',
'type' => 'select',
'show_in_rest' => ['type'=>'integer'],
'default' => 0,
'options' => [0=>'默认']+wpjam_fill(range(2, 6), fn($v)=> 'H'.$v)+[-1=>'不显示']
]]
]);
}
}
wpjam_register_option('wpjam-toc', [
'model' => 'WPJAM_Toc',
'title' => '文章目录',
'menu_page' => ['tab_slug'=>'toc', 'plugin_page'=>'wpjam-posts', 'summary'=> __FILE__]
]);
function wpjam_get_toc(){
return WPJAM_Toc::output();
}