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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\base;
use Yii;
use yii\helpers\Html;
/**
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class ViewContent extends Component
{
const POS_HEAD = 1;
const POS_BEGIN = 2;
const POS_END = 3;
const TOKEN_HEAD = '<![CDATA[YII-BLOCK-HEAD]]>';
const TOKEN_BODY_BEGIN = '<![CDATA[YII-BLOCK-BODY-BEGIN]]>';
const TOKEN_BODY_END = '<![CDATA[YII-BLOCK-BODY-END]]>';
public $assetBundles;
public $title;
public $metaTags;
public $linkTags;
public $css;
public $cssFiles;
public $js;
public $jsFiles;
public $jsInHead;
public $jsFilesInHead;
public $jsInBody;
public $jsFilesInBody;
public function reset()
{
$this->title = null;
$this->metaTags = null;
$this->linkTags = null;
$this->css = null;
$this->cssFiles = null;
$this->js = null;
$this->jsFiles = null;
$this->jsInHead = null;
$this->jsFilesInHead = null;
$this->jsInBody = null;
$this->jsFilesInBody = null;
}
private $_assetManager;
/**
* @return \yii\web\AssetManager
*/
public function getAssetManager()
{
return $this->_assetManager ?: Yii::$app->getAssets();
}
public function setAssetManager($value)
{
$this->_assetManager = $value;
}
public function begin()
{
ob_start();
ob_implicit_flush(false);
}
public function end()
{
$content = ob_get_clean();
echo $this->populate($content);
}
public function beginBody()
{
echo self::TOKEN_BODY_BEGIN;
}
public function endBody()
{
echo self::TOKEN_BODY_END;
}
public function head()
{
echo self::TOKEN_HEAD;
}
public function registerAssetBundle($name)
{
if (!isset($this->assetBundles[$name])) {
$am = $this->getAssetManager();
$bundle = $am->getBundle($name);
if ($bundle !== null) {
$this->assetBundles[$name] = false;
$bundle->registerAssets($this, $am);
$this->assetBundles[$name] = true;
} else {
throw new InvalidConfigException("Unknown asset bundle: $name");
}
} elseif ($this->assetBundles[$name] === false) {
throw new InvalidConfigException("A cyclic dependency is detected for bundle '$name'.");
}
}
public function registerMetaTag($options, $key = null)
{
if ($key === null) {
$this->metaTags[] = Html::tag('meta', '', $options);
} else {
$this->metaTags[$key] = Html::tag('meta', '', $options);
}
}
public function registerLinkTag($options, $key = null)
{
if ($key === null) {
$this->linkTags[] = Html::tag('link', '', $options);
} else {
$this->linkTags[$key] = Html::tag('link', '', $options);
}
}
public function registerCss($css, $options = array(), $key = null)
{
$key = $key ?: $css;
$this->css[$key] = Html::style($css, $options);
}
public function registerCssFile($url, $options = array(), $key = null)
{
$key = $key ?: $url;
$this->cssFiles[$key] = Html::cssFile($url, $options);
}
public function registerJs($js, $options = array(), $key = null)
{
$position = isset($options['position']) ? $options['position'] : self::POS_END;
unset($options['position']);
$key = $key ?: $js;
$html = Html::script($js, $options);
if ($position == self::POS_END) {
$this->js[$key] = $html;
} elseif ($position == self::POS_HEAD) {
$this->jsInHead[$key] = $html;
} elseif ($position == self::POS_BEGIN) {
$this->jsInBody[$key] = $html;
} else {
throw new InvalidParamException("Unknown position: $position");
}
}
public function registerJsFile($url, $options = array(), $key = null)
{
$position = isset($options['position']) ? $options['position'] : self::POS_END;
unset($options['position']);
$key = $key ?: $url;
$html = Html::jsFile($url, $options);
if ($position == self::POS_END) {
$this->jsFiles[$key] = $html;
} elseif ($position == self::POS_HEAD) {
$this->jsFilesInHead[$key] = $html;
} elseif ($position == self::POS_BEGIN) {
$this->jsFilesInBody[$key] = $html;
} else {
throw new InvalidParamException("Unknown position: $position");
}
}
protected function populate($content)
{
return strtr($content, array(
self::TOKEN_HEAD => $this->getHeadHtml(),
self::TOKEN_BODY_BEGIN => $this->getBodyBeginHtml(),
self::TOKEN_BODY_END => $this->getBodyEndHtml(),
));
}
protected function getHeadHtml()
{
$lines = array();
if (!empty($this->metaTags)) {
$lines[] = implode("\n", $this->cssFiles);
}
if (!empty($this->linkTags)) {
$lines[] = implode("\n", $this->cssFiles);
}
if (!empty($this->cssFiles)) {
$lines[] = implode("\n", $this->cssFiles);
}
if (!empty($this->css)) {
$lines[] = implode("\n", $this->css);
}
if (!empty($this->jsFilesInHead)) {
$lines[] = implode("\n", $this->jsFilesInHead);
}
if (!empty($this->jsInHead)) {
$lines[] = implode("\n", $this->jsInHead);
}
return implode("\n", $lines);
}
protected function getBodyBeginHtml()
{
$lines = array();
if (!empty($this->jsFilesInBody)) {
$lines[] = implode("\n", $this->jsFilesInBody);
}
if (!empty($this->jsInHead)) {
$lines[] = implode("\n", $this->jsInBody);
}
return implode("\n", $lines);
}
protected function getBodyEndHtml()
{
$lines = array();
if (!empty($this->jsFiles)) {
$lines[] = implode("\n", $this->jsFiles);
}
if (!empty($this->js)) {
$lines[] = implode("\n", $this->js);
}
return implode("\n", $lines);
}
}