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<?php
/**
* @copyright Copyright © Kartik Visweswaran, Krajee.com, 2014
* @package yii2-widgets
* @subpackage yii2-widget-affix
* @version 1.0.0
*/
namespace kartik\affix;
use Yii;
use yii\base\InvalidConfigException;
use yii\helpers\Html;
use yii\helpers\ArrayHelper;
/**
* A scrollspy and affixed enhanced navigation to highlight sections and secondary
* sections in each page
*
* For example:
*
* ```php
* echo Affix::widget([
* 'items' => [
* [
* 'url' => '#section-1',
* 'label' => 'Section 1',
* 'icon' => 'asterisk'
* ],
* [
* 'url' => '#section-2',
* 'label' => 'Section 2',
* 'icon' => 'asterisk'
* 'items' => [
* ['url' => '#section-2-1', 'label' => 'Section 2.1'],
* ['url' => '#section-2-2', 'label' => 'Section 2.2'],
* ],
* ],
* ],
* ]);
* ```
*
* @author Kartik Visweswaran <kartikv2@gmail.com>
*/
class Affix extends \yii\widgets\Menu
{
/**
* @var string, the type of content to display. By default displays the navigation menu
* If set to 'body' it will display the body.
*/
public $type = 'menu';
/**
* @var array list of affic menu items. Each menu item should be an array of the following structure:
*
* - label: string, mandatory, specifies the menu item label. When [[encodeLabels]] is true, the label
* will be HTML-encoded.
* - icon: string, optional, specifies the glyphicon name to be placed before label.
* - header: string, optional, the header for the body content to be rendered in the main page
* using Affix::body. If not set, this will be defaulted to the label.
* - subheader: string, optional, the subheader that will be printed within the header.
* - content: string, the body content to be rendered in the main page using renderBody.
* - url: string, mandatory, specifies the URL of the menu item. This will be a bookmark on the same page.
* For example "#section-1" or "#section-1-1".
* - items: array, optional, specifies the sub-menu items. Its format is the same as the parent items.
* - options: array, optional, the HTML attributes for the menu item tag.
*/
public $items;
/* @var array options for the affix main container */
public $container;
/* @var string the body main section template */
public $secTemplate = <<<EOT
<div class="kv-section">
<div class="page-header">
<h1 id="{id}">{header}</h1>
</div>
{content}{subSection}
</div>
EOT;
/* @var string the body sub section template */
public $subTemplate = <<<EOT
<div class="kv-sub-section">
<h3 id="{id}">{header}</h3>
{content}
</div>
EOT;
public function init()
{
parent::init();
AffixAsset::register($this->getView());
$this->activateParents = true;
$this->submenuTemplate = "\n<ul class='nav'>\n{items}\n</ul>\n";
$this->linkTemplate = '<a href="{url}">{icon}{label}</a>';
$this->labelTemplate = '{icon}{label}';
Html::addCssClass($this->options, 'nav kv-nav');
Html::addCssClass($this->container, 'kv-sidebar hidden-print-affix');
}
public function run()
{
if ($this->type == 'body') {
echo $this->renderBody($this->items);
} else {
if ($this->route === null && Yii::$app->controller !== null) {
$this->route = Yii::$app->controller->getRoute();
}
if ($this->params === null) {
$this->params = $_GET;
}
$items = $this->normalizeItems($this->items, $hasActiveChild);
$options = $this->options;
$tag = ArrayHelper::remove($options, 'tag', 'ul');
$menu = Html::tag($tag, $this->renderItems($items), $options);
echo Html::tag('div', $menu, $this->container);
}
}
/**
* Generates the affix body content
*
* @param array $items the items to be rendered as body content
* @return string the rendering result
*/
protected function renderBody($items)
{
$body = '';
foreach ($items as $item) {
$body .= $this->renderSection($item) . "\n";
}
echo $body;
}
/**
* Renders each body main section.
*
* @param array $item the section item to be rendered. Please refer to [[items]]
* to see what data might be in the item.
* @return string the rendering result
* @throws InvalidConfigException
*/
protected function renderSection($item)
{
$this->validateItems($item);
$id = str_replace('#', '', $item['url']);
$header = ArrayHelper::getValue($item, 'header', $item['label']);
if (isset($item['subheader'])) {
$header .= ' <small>' . $item['subheader'] . '</small>';
}
$content = ArrayHelper::getValue($item, 'content', '');
$subSection = '';
if (isset($item['items'])) {
foreach ($item['items'] as $subItem) {
$subSection .= "\n" . $this->renderSubSection($subItem);
}
}
return strtr($this->secTemplate, [
'{id}' => $id,
'{header}' => $header,
'{content}' => $content,
'{subSection}' => $subSection
]);
}
/**
* Renders each body sub section.
*
* @param array $item the sub-section item to be rendered. Please refer to [[items]]
* to see what data might be in the item.
* @return string the rendering result
* @throws InvalidConfigException
*/
protected function renderSubSection($item)
{
$this->validateItems($item);
$id = str_replace('#', '', $item['url']);
$header = ArrayHelper::getValue($item, 'header', $item['label']);
if (isset($item['subheader'])) {
$header .= ' <small>' . $item['subheader'] . '</small>';
}
$content = ArrayHelper::getValue($item, 'content', '');
return strtr($this->subTemplate, [
'{id}' => $id,
'{header}' => $header,
'{content}' => $content,
]);
}
/**
* Renders the content of a affix menu item.
* Note that the container and the sub-menus are not rendered here.
*
* @param array $item the menu item to be rendered. Please refer to [[items]] to see what data might be in the item.
* @return string the rendering result
* @throws InvalidConfigException
*/
protected function renderItem($item)
{
$this->validateItems($item);
$template = ArrayHelper::getValue($item, 'template', $this->linkTemplate);
$icon = empty($item['icon']) ? '' : '<i class="glyphicon glyphicon-' . $item['icon'] . '"></i> ';
return strtr($template, [
'{url}' => $item['url'],
'{label}' => $item['label'],
'{icon}' => $icon
]);
}
/**
* Validates each item for a valid label and url.
*
* @throws InvalidConfigException
*/
protected function validateItems($item)
{
if (!isset($item['label'])) {
throw new InvalidConfigException("The 'label' option is required.");
}
if (!isset($item['url']) || substr($item['url'], 0, 1) != '#') {
throw new InvalidConfigException("The 'url' option is required and must point to a bookmarked content on the same page.");
}
}
}