script WIP

framework/base/View.php

@@ -37,7 +37,7 @@ class View extends Component
 	/**
 	 * @var ViewContent
 	 */
-	public $content;
+	public $page;
 	/**
 	 * @var mixed custom parameters that are shared among view templates.
 	 */
@@ -88,10 +88,10 @@ class View extends Component
 		if (is_array($this->theme)) {
 			$this->theme = Yii::createObject($this->theme);
 		}
-		if (is_array($this->content)) {
-			$this->content = Yii::createObject($this->content);
+		if (is_array($this->page)) {
+			$this->page = Yii::createObject($this->page);
 		} else {
-			$this->content = new ViewContent;
+			$this->page = new ViewContent;
 		}
 	}
 
@@ -166,7 +166,6 @@ class View extends Component
 			} else {
 				$output = $this->renderPhpFile($viewFile, $params);
 			}
-			$output = $this->content->populate($output);
 			$this->afterRender($viewFile, $output);
 		}
 

framework/base/ViewContent.php

@@ -8,6 +8,7 @@
 namespace yii\base;
 
 use Yii;
+use yii\helpers\Html;
 
 /**
  * @author Qiang Xue <qiang.xue@gmail.com>
@@ -19,6 +20,10 @@ class ViewContent extends Component
 	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]]>';
+
 	/**
 	 * @var array
 	 *
@@ -44,7 +49,7 @@ class ViewContent extends Component
 	 * )
 	 * ~~~
 	 */
-	public $bundles;
+	public $assetBundles;
 	public $title;
 	public $metaTags;
 	public $linkTags;
@@ -57,11 +62,6 @@ class ViewContent extends Component
 	public $jsInBody;
 	public $jsFilesInBody;
 
-	public function populate($content)
-	{
-		return $content;
-	}
-
 	public function reset()
 	{
 		$this->title = null;
@@ -77,7 +77,169 @@ class ViewContent extends Component
 		$this->jsFilesInBody = null;
 	}
 
-	public function renderScripts($pos)
+	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 requireAssetBundle($name)
+	{
+		if (!isset($this->assetBundles[$name])) {
+			$bundle = Yii::$app->assets->getBundle($name);
+			if ($bundle !== null) {
+				$this->assetBundles[$name] = $bundle;
+			} else {
+				throw new InvalidConfigException("Unknown asset bundle: $name");
+			}
+			foreach ($bundle->depends as $d) {
+				$this->requireAssetBundle($d);
+			}
+		}
+	}
+	
+	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, $position = self::POS_END, $options = array(), $key = null)
+	{
+		$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, $position = self::POS_END, $options = array(), $key = null)
+	{
+		$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)
+	{
+		$this->expandAssetBundles();
+		return strtr($content, array(
+			self::TOKEN_HEAD => $this->getHeadHtml(),
+			self::TOKEN_BODY_BEGIN => $this->getBodyBeginHtml(),
+			self::TOKEN_BODY_END => $this->getBodyEndHtml(),
+		));
+	}
+
+	protected function expandAssetBundles()
+	{
+
+	}
+
+	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);
 	}
 }