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Diffstat (limited to 'lib/prado/framework/Web/UI/WebControls/THead.php')
| -rw-r--r-- | lib/prado/framework/Web/UI/WebControls/THead.php | 372 |
1 files changed, 372 insertions, 0 deletions
diff --git a/lib/prado/framework/Web/UI/WebControls/THead.php b/lib/prado/framework/Web/UI/WebControls/THead.php new file mode 100644 index 0000000..c7c9b57 --- /dev/null +++ b/lib/prado/framework/Web/UI/WebControls/THead.php @@ -0,0 +1,372 @@ +<?php +/** + * THead class file + * + * @author Marcus Nyeholt <tanus@users.sourceforge.net> and Qiang Xue <qiang.xue@gmail.com> + * @link https://github.com/pradosoft/prado + * @copyright Copyright © 2005-2015 The PRADO Group + * @license https://github.com/pradosoft/prado/blob/master/COPYRIGHT + * @package System.Web.UI + */ + +/** + * THead class + * + * THead displays a head element on a page. It displays the content + * enclosed in its body and the page title set by the + * {@link setTitle Title} property. In addition, stylesheets and JavaScripts registered via + * {@link TClientScriptManager::registerStyleSheet}, {@link TClientScriptManager::registerStyleSheetFile} + * {@link TClientScriptManager::registerHeadJavaScript}, and + * {@link TClientScriptManager::registerHeadJavaScriptFile} will also be displayed + * in the head. + * THead also manages and displays meta tags through its {@link getMetaTags MetaTags} + * property. You can add a meta object to the collection in code dynamically, + * or add it in template using the following syntax, + * <code> + * <com:THead> + * <com:TMetaTag HttpEquiv="Pragma" Content="no-cache" /> + * <com:TMetaTag Name="keywords" Content="Prado" /> + * </com:THead> + * </code> + * + * Note, {@link TPage} has a property {@link TPage::getHead Head} that refers to + * the THead control currently on the page. A page can have at most one THead + * control. Although not required, it is recommended to place a THead on your page. + * Without a THead on the page, stylesheets and javascripts in the current page + * theme will not be rendered. + * + * @author Marcus Nyeholt <tanus@users.sourceforge.net> and Qiang Xue <qiang.xue@gmail.com> + * @package System.Web.UI + * @since 3.0 + */ +class THead extends TControl +{ + /** + * @var TList list of meta name tags to be loaded by {@link THead} + */ + private $_metaTags=null; + + /** + * Registers the head control with the current page. + * This method is invoked when the control enters 'Init' stage. + * The method raises 'Init' event. + * If you override this method, be sure to call the parent implementation + * so that the event handlers can be invoked. + * @param TEventParameter event parameter to be passed to the event handlers + */ + public function onInit($param) + { + parent::onInit($param); + $this->getPage()->setHead($this); + } + + /** + * Processes an object that is created during parsing template. + * This method adds TMetaTag components into the {@link getMetaTags MetaTags} + * collection of the head control. + * @param string|TComponent text string or component parsed and instantiated in template + * @see createdOnTemplate + */ + public function addParsedObject($object) + { + if($object instanceof TMetaTag) + $this->getMetaTags()->add($object); + else + parent::addParsedObject($object); + } + + /** + * @return string the page title. + */ + public function getTitle() + { + return $this->getViewState('Title',''); + } + + /** + * Sets the page title. + * This title will be rendered only if the {@link TPage::getTitle Title} property + * of the page is empty. + * @param string the page title. + */ + public function setTitle($value) + { + $this->setViewState('Title',$value,''); + } + + /** + * @return string base URL of the page. This URL is rendered as the 'href' attribute of <base> tag. Defaults to ''. + */ + public function getBaseUrl() + { + return $this->getViewState('BaseUrl',''); + } + + /** + * @param string base URL of the page. This URL is rendered as the 'href' attribute of <base> tag. + */ + public function setBaseUrl($url) + { + $this->setViewState('BaseUrl',$url,''); + } + + /** + * @return string the URL for the shortcut icon of the page. Defaults to ''. + */ + public function getShortcutIcon() + { + return $this->getViewState('ShortcutIcon',''); + } + + /** + * @param string the URL for the shortcut icon of the page. + */ + public function setShortcutIcon($url) + { + $this->setViewState('ShortcutIcon',$url,''); + } + + /** + * @return TMetaTagCollection meta tag collection + */ + public function getMetaTags() + { + if(($metaTags=$this->getViewState('MetaTags',null))===null) + { + $metaTags=new TMetaTagCollection; + $this->setViewState('MetaTags',$metaTags,null); + } + return $metaTags; + } + + /** + * Renders the head control. + * @param THtmlWriter the writer for rendering purpose. + */ + public function render($writer) + { + $page=$this->getPage(); + $title=$this->getTitle(); + $writer->write("<head>\n<title>".THttpUtility::htmlEncode($title)."</title>\n"); + if(($baseUrl=$this->getBaseUrl())!=='') + $writer->write('<base href="'.$baseUrl."\" />\n"); + if(($icon=$this->getShortcutIcon())!=='') + $writer->write('<link rel="shortcut icon" href="'.$icon."\" />\n"); + + if(($metaTags=$this->getMetaTags())!==null) + { + foreach($metaTags as $metaTag) + { + $metaTag->render($writer); + $writer->writeLine(); + } + } + $cs=$page->getClientScript(); + $cs->renderStyleSheetFiles($writer); + $cs->renderStyleSheets($writer); + if($page->getClientSupportsJavaScript()) + { + $cs->renderHeadScriptFiles($writer); + $cs->renderHeadScripts($writer); + } + parent::render($writer); + $writer->write("</head>\n"); + } +} + +/** + * TMetaTag class. + * + * TMetaTag represents a meta tag appearing in a page head section. + * You can set its {@link setID ID}, {@link setHttpEquiv HttpEquiv}, + * {@link setName Name}, {@link setContent Content}, {@link setScheme Scheme} + * properties, which correspond to id, http-equiv, name, content, and scheme + * attributes for a meta tag, respectively. + * + * @author Qiang Xue <qiang.xue@gmail.com> + * @package System.Web.UI.WebControls + * @since 3.0 + */ +class TMetaTag extends TComponent +{ + /** + * @var string id of the meta tag + */ + private $_id=''; + /** + * @var string http-equiv attribute of the meta tag + */ + private $_httpEquiv=''; + /** + * @var string name attribute of the meta tag + */ + private $_name=''; + /** + * @var string content attribute of the meta tag + */ + private $_content=''; + /** + * @var string scheme attribute of the meta tag + */ + private $_scheme=''; + + /** + * @return string id of the meta tag + */ + public function getID() + { + return $this->_id; + } + + /** + * @param string id of the meta tag + */ + public function setID($value) + { + $this->_id=$value; + } + + /** + * @return string http-equiv attribute of the meta tag + */ + public function getHttpEquiv() + { + return $this->_httpEquiv; + } + + /** + * @param string http-equiv attribute of the meta tag + */ + public function setHttpEquiv($value) + { + $this->_httpEquiv=$value; + } + + /** + * @return string name attribute of the meta tag + */ + public function getName() + { + return $this->_name; + } + + /** + * @param string name attribute of the meta tag + */ + public function setName($value) + { + $this->_name=$value; + } + + /** + * @return string content attribute of the meta tag + */ + public function getContent() + { + return $this->_content; + } + + /** + * @param string content attribute of the meta tag + */ + public function setContent($value) + { + $this->_content=$value; + } + + /** + * @return string scheme attribute of the meta tag + */ + public function getScheme() + { + return $this->_scheme; + } + + /** + * @param string scheme attribute of the meta tag + */ + public function setScheme($value) + { + $this->_scheme=$value; + } + + /** + * Renders the meta tag. + * @param THtmlWriter writer for the rendering purpose + */ + public function render($writer) + { + if($this->_id!=='') + $writer->addAttribute('id',$this->_id); + if($this->_name!=='') + $writer->addAttribute('name',$this->_name); + if($this->_httpEquiv!=='') + $writer->addAttribute('http-equiv',$this->_httpEquiv); + if($this->_scheme!=='') + $writer->addAttribute('scheme',$this->_scheme); + $writer->addAttribute('content',$this->_content); + $writer->renderBeginTag('meta'); + $writer->renderEndTag(); + } +} + + +/** + * TMetaTagCollection class + * + * TMetaTagCollection represents a collection of meta tags + * contained in a {@link THead} control. + * + * @author Qiang Xue <qiang.xue@gmail.com> + * @package System.Web.UI.WebControls + * @since 3.0 + */ +class TMetaTagCollection extends TList +{ + /** + * Inserts an item at the specified position. + * This overrides the parent implementation by performing type + * check on the item being added. + * @param integer the speicified position. + * @param mixed new item + * @throws TInvalidDataTypeException if the item to be inserted is not a {@link TMetaTag} + */ + public function insertAt($index,$item) + { + if($item instanceof TMetaTag) + parent::insertAt($index,$item); + else + throw new TInvalidDataTypeException('metatagcollection_metatag_invalid'); + } + + /** + * Finds the lowest cardinal index of the meta tag whose id is the one being looked for. + * @param string the ID of the meta tag to be looked for + * @return integer the index of the meta tag found, -1 if not found. + */ + public function findIndexByID($id) + { + $index=0; + foreach($this as $item) + { + if($item->getID()===$id) + return $index; + $index++; + } + return -1; + } + + /** + * Finds the item whose value is the one being looked for. + * @param string the id of the meta tag to be looked for + * @return TMetaTag the meta tag found, null if not found. + */ + public function findMetaTagByID($id) + { + if(($index=$this->findIndexByID($id))>=0) + return $this->itemAt($index); + else + return null; + } +} + |