view.php

Joomla15 - 最新开源CMS

	{
		$result = false;

		// If $model is null we use the default model
		if (is_null($model)) {
			$model = $this->_defaultModel;
		} else {
			$model = strtolower( $model );
		}

		// First check to make sure the model requested exists
		if (isset( $this->_models[$model] ))
		{
			// Model exists, lets build the method name
			$method = 'get'.ucfirst($method);

			// Does the method exist?
			if (method_exists($this->_models[$model], $method))
			{
				// The method exists, lets call it and return what we get
				$result = $this->_models[$model]->$method();
			}
			else
			{
				// Method wasn't found... throw a warning and return false
				JError::raiseWarning( 0, "Unknown Method $model::$method() was not found");
				$result = false;
			}
		}
		else
		{
			// degrade to JObject::get
			$result = parent::get( $method, $model );
		}

		return $result;
	}

	/**
	 * Method to get the model object
	 *
	 * @access	public
	 * @param	string	$name	The name of the model (optional)
	 * @return	mixed			JModel object
	 */
	function &getModel( $name = null )
	{
		if ($name === null) {
			$name = $this->_defaultModel;
		}
		return $this->_models[strtolower( $name )];
	}
	
	/**
	* Get the layout.
	*
	* @access public
	* @return string The layout name
	*/

	function getLayout()
	{
		return $this->_layout;
	}
	
	/**
	 * Method to get the view name
	 *
	 * The model name by default parsed using the classname, or it can be set
	 * by passing a $config['name'] in the class constructor
	 *
	 * @access	public
	 * @return	string The name of the model
	 * @since	1.5
	 */
	function getName()
	{
		$name = $this->_name;

		if (empty( $name ))
		{
			$r = null;
			if (!preg_match('/View((view)*(.*(view)?.*))$/i', get_class($this), $r)) {
				JError::raiseError (500, "JView::getName() : Cannot get or parse class name.");
			}
			$name = strtolower( $r[3] );
		}

		return $name;
	}
	
	/**
	 * Method to add a model to the view.  We support a multiple model single
	 * view system by which models are referenced by classname.  A caveat to the
	 * classname referencing is that any classname prepended by JModel will be
	 * referenced by the name without JModel, eg. JModelCategory is just
	 * Category.
	 *
	 * @access	public
	 * @param	object	$model		The model to add to the view.
	 * @param	boolean	$default	Is this the default model?
	 * @return	object				The added model
	 */
	function &setModel( &$model, $default = false )
	{
		$name = strtolower($model->getName());
		$this->_models[$name] = &$model;

		if ($default) {
			$this->_defaultModel = $name;
		}
		return $model;
	}

	/**
	* Sets the layout name to use
	*
	* @access	public
	* @param	string $template The template name.
	* @return	string Previous value
	* @since	1.5
	*/

	function setLayout($layout)
	{
		$previous		= $this->_layout;
		$this->_layout = $layout;
		return $previous;
	}

	/**
	 * Allows a different extension for the layout files to be used
	 *
	 * @access	public
	 * @param	string	The extension
	 * @return	string	Previous value
	 * @since	1.5
	 */
	function setLayoutExt( $value )
	{
		$previous	= $this->_layoutExt;
		if ($value = preg_replace( '#[^A-Za-z0-9]#', '', trim( $value ) )) {
			$this->_layoutExt = $value;
		}
		return $previous;
	}
	
	 /**
     * Sets the _escape() callback.
     *
     * @param mixed $spec The callback for _escape() to use.
     */
    function setEscape($spec)
    {
        $this->_escape = $spec;
    }

	/**
	 * Adds to the stack of view script paths in LIFO order.
	 *
	 * @param string|array The directory (-ies) to add.
	 * @return void
	 */
	function addTemplatePath($path)
	{
		$this->_addPath('template', $path);
	}

	/**
	 * Adds to the stack of helper script paths in LIFO order.
	 *
	 * @param string|array The directory (-ies) to add.
	 * @return void
	 */
	function addHelperPath($path)
	{
		$this->_addPath('helper', $path);
	}

	/**
	 * Load a template file -- first look in the templates folder for an override
	 *
	 * @access	public
	 * @param string $tpl The name of the template source file ...
	 * automatically searches the template paths and compiles as needed.
	 * @return string The output of the the template script.
	 */
	function loadTemplate( $tpl = null)
	{
		global $mainframe, $option;

		// clear prior output
		$this->_output = null;

		//create the template file name based on the layout
		$file = isset($tpl) ? $this->_layout.'_'.$tpl : $this->_layout;
		// clean the file name
		$file = preg_replace('/[^A-Z0-9_\.-]/i', '', $file);
		$tpl  = preg_replace('/[^A-Z0-9_\.-]/i', '', $tpl);

		// load the template script
		jimport('joomla.filesystem.path');
		$this->_template = JPath::find($this->_path['template'], $this->_createFileName('template', array('name' => $file)));

		if ($this->_template != false)
		{
			// unset so as not to introduce into template scope
			unset($tpl);
			unset($file);

			// never allow a 'this' property
			if (isset($this->this)) {
				unset($this->this);
			}

			// start capturing output into a buffer
			ob_start();
			// include the requested template filename in the local scope
			// (this will execute the view logic).
			include $this->_template;

			// done with the requested template; get the buffer and
			// clear it.
			$this->_output = ob_get_contents();
			ob_end_clean();

			return $this->_output;
		}
		else {
			return JError::raiseError( 500, 'Layout "' . $file . '" not found' );
		}
	}

	/**
	 * Load a helper file
	 *
	 * @access	public
	 * @param string $tpl The name of the helper source file ...
	 * automatically searches the helper paths and compiles as needed.
	 * @return boolean Returns true if the file was loaded
	 */
	function loadHelper( $hlp = null)
	{
		// clean the file name
		$file = preg_replace('/[^A-Z0-9_\.-]/i', '', $hlp);

		// load the template script
		jimport('joomla.filesystem.path');
		$helper = JPath::find($this->_path['helper'], $this->_createFileName('helper', array('name' => $file)));

		if ($helper != false)
		{
			// include the requested template filename in the local scope
			include_once $helper;
		}
	}

	/**
	* Sets an entire array of search paths for templates or resources.
	*
	* @access protected
	* @param string $type The type of path to set, typically 'template'.
	* @param string|array $path The new set of search paths.  If null or
	* false, resets to the current directory only.
	*/
	function _setPath($type, $path)
	{
		global $mainframe, $option;

		// clear out the prior search dirs
		$this->_path[$type] = array();

		// actually add the user-specified directories
		$this->_addPath($type, $path);

		// always add the fallback directories as last resort
		switch (strtolower($type))
		{
			case 'template':
			{
				// set the alternative template search dir
				if (isset($mainframe))
				{
					$option = preg_replace('/[^A-Z0-9_\.-]/i', '', $option);
					$fallback = JPATH_BASE.DS.'templates'.DS.$mainframe->getTemplate().DS.'html'.DS.$option.DS.$this->_name;
					$this->_addPath('template', $fallback);
				}
			}	break;
		}
	}

	/**
	* Adds to the search path for templates and resources.
	*
	* @access protected
	* @param string|array $path The directory or stream to search.
	*/
	function _addPath($type, $path)
	{
		// just force to array
		settype($path, 'array');

		// loop through the path directories
		foreach ($path as $dir)
		{
			// no surrounding spaces allowed!
			$dir = trim($dir);

			// add trailing separators as needed
			if (substr($dir, -1) != DIRECTORY_SEPARATOR) {
				// directory
				$dir .= DIRECTORY_SEPARATOR;
			}

			// add to the top of the search dirs
			array_unshift($this->_path[$type], $dir);
		}
	}

	/**
	 * Create the filename for a resource
	 *
	 * @access private
	 * @param string 	$type  The resource type to create the filename for
	 * @param array 	$parts An associative array of filename information
	 * @return string The filename
	 * @since 1.5
	 */
	function _createFileName($type, $parts = array())
	{
		$filename = '';

		switch($type)
		{
			case 'template' :
				$filename = strtolower($parts['name']).'.'.$this->_layoutExt;
				break;

			default :
				$filename = strtolower($parts['name']).'.php';
				break;
		}
		return $filename;
	}
}