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<?php
/**
* @package Joomla.Libraries
* @subpackage Layout
*
* @copyright Copyright (C) 2005 - 2014 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
defined('JPATH_BASE') or die;
/**
* Base class for rendering a display layout
* loaded from from a layout file
*
* @package Joomla.Libraries
* @subpackage Layout
* @see http://docs.joomla.org/Sharing_layouts_across_views_or_extensions_with_JLayout
* @since 3.0
*/
class JLayoutFile extends JLayoutBase
{
/**
* @var string Dot separated path to the layout file, relative to base path
* @since 3.0
*/
protected $layoutId = '';
/**
* @var string Base path to use when loading layout files
* @since 3.0
*/
protected $basePath = null;
/**
* @var string Full path to actual layout files, after possible template override check
* @since 3.0.3
*/
protected $fullPath = null;
/**
* Paths to search for layouts
*
* @var array
* @since 3.2
*/
protected $includePaths = array();
/**
* Method to instantiate the file-based layout.
*
* @param string $layoutId Dot separated path to the layout file, relative to base path
* @param string $basePath Base path to use when loading layout files
* @param mixed $options Optional custom options to load. JRegistry or array format [@since 3.2]
*
* @since 3.0
*/
public function __construct($layoutId, $basePath = null, $options = null)
{
// Initialise / Load options
$this->setOptions($options);
// Main properties
$this->setLayout($layoutId);
$this->basePath = $basePath;
// Init Enviroment
$this->setComponent($this->options->get('component', 'auto'));
$this->setClient($this->options->get('client', 'auto'));
}
/**
* Method to render the layout.
*
* @param object $displayData Object which properties are used inside the layout file to build displayed output
*
* @return string The necessary HTML to display the layout
*
* @since 3.0
*/
public function render($displayData)
{
$layoutOutput = '';
// Check possible overrides, and build the full path to layout file
$path = $this->getPath();
if ($this->options->get('debug', false))
{
echo "<pre>" . $this->renderDebugMessages() . "</pre>";
}
// If there exists such a layout file, include it and collect its output
if (!empty($path))
{
ob_start();
include $path;
$layoutOutput = ob_get_contents();
ob_end_clean();
}
return $layoutOutput;
}
/**
* Method to finds the full real file path, checking possible overrides
*
* @return string The full path to the layout file
*
* @since 3.0
*/
protected function getPath()
{
JLoader::import('joomla.filesystem.path');
if (is_null($this->fullPath) && !empty($this->layoutId))
{
$this->addDebugMessage('<strong>Layout:</strong> ' . $this->layoutId);
// Refresh paths
$this->refreshIncludePaths();
$this->addDebugMessage('<strong>Include Paths:</strong> ' . print_r($this->includePaths, true));
$suffixes = $this->options->get('suffixes', array());
// Search for suffixed versions. Example: tags.j31.php
if (!empty($suffixes))
{
$this->addDebugMessage('<strong>Suffixes:</strong> ' . print_r($suffixes, true));
foreach ($suffixes as $suffix)
{
$rawPath = str_replace('.', '/', $this->layoutId) . '.' . $suffix . '.php';
$this->addDebugMessage('<strong>Searching layout for:</strong> ' . $rawPath);
if ($this->fullPath = JPath::find($this->includePaths, $rawPath))
{
$this->addDebugMessage('<strong>Found layout:</strong> ' . $this->fullPath);
return $this->fullPath;
}
}
}
// Standard version
$rawPath = str_replace('.', '/', $this->layoutId) . '.php';
$this->addDebugMessage('<strong>Searching layout for:</strong> ' . $rawPath);
$this->fullPath = JPath::find($this->includePaths, $rawPath);
if ($this->fullPath = JPath::find($this->includePaths, $rawPath))
{
$this->addDebugMessage('<strong>Found layout:</strong> ' . $this->fullPath);
}
}
return $this->fullPath;
}
/**
* Add one path to include in layout search. Proxy of addIncludePaths()
*
* @param string $path The path to search for layouts
*
* @return void
*
* @since 3.2
*/
public function addIncludePath($path)
{
$this->addIncludePaths($path);
}
/**
* Add one or more paths to include in layout search
*
* @param string $paths The path or array of paths to search for layouts
*
* @return void
*
* @since 3.2
*/
public function addIncludePaths($paths)
{
if (!empty($paths))
{
if (is_array($paths))
{
$this->includePaths = array_unique(array_merge($paths, $this->includePaths));
}
else
{
array_unshift($this->includePaths, $paths);
}
}
}
/**
* Remove one path from the layout search
*
* @param string $path The path to remove from the layout search
*
* @return void
*
* @since 3.2
*/
public function removeIncludePath($path)
{
$this->removeIncludePaths($path);
}
/**
* Remove one or more paths to exclude in layout search
*
* @param string $paths The path or array of paths to remove for the layout search
*
* @return void
*
* @since 3.2
*/
public function removeIncludePaths($paths)
{
if (!empty($paths))
{
$paths = (array) $paths;
$this->includePaths = array_diff($this->includePaths, $paths);
}
}
/**
* Validate that the active component is valid
*
* @param string $option URL Option of the component. Example: com_content
*
* @return boolean
*
* @since 3.2
*/
protected function validComponent($option = null)
{
// By default we will validate the active component
$component = ($option !== null) ? $option : $this->options->get('component', null);
if (!empty($component))
{
// Valid option format
if (substr_count($component, 'com_'))
{
// Latest check: component exists and is enabled
return JComponentHelper::isEnabled($component);
}
}
return false;
}
/**
* Method to change the component where search for layouts
*
* @param string $option URL Option of the component. Example: com_content
*
* @return mixed Component option string | null for none
*
* @since 3.2
*/
public function setComponent($option)
{
$component = null;
switch ((string) $option)
{
case 'none':
$component = null;
break;
case 'auto':
if (defined('JPATH_COMPONENT'))
{
$parts = explode('/', JPATH_COMPONENT);
$component = end($parts);
}
break;
default:
$component = $option;
break;
}
// Extra checks
if (!$this->validComponent($component))
{
$component = null;
}
$this->options->set('component', $component);
// Refresh include paths
$this->refreshIncludePaths();
}
/**
* Function to initialise the application client
*
* @param mixed $client Frontend: 'site' or 0 | Backend: 'admin' or 1
*
* @return void
*
* @since 3.2
*/
public function setClient($client)
{
// Force string conversion to avoid unexpected states
switch ((string) $client)
{
case 'site':
case '0':
$client = 0;
break;
case 'admin':
case '1':
$client = 1;
break;
default:
$client = (int) JFactory::getApplication()->isAdmin();
break;
}
$this->options->set('client', $client);
// Refresh include paths
$this->refreshIncludePaths();
}
/**
* Change the layout
*
* @param string $layoutId Layout to render
*
* @return void
*
* @since 3.2
*/
public function setLayout($layoutId)
{
$this->layoutId = $layoutId;
$this->fullPath = null;
}
/**
* Refresh the list of include paths
*
* @return void
*
* @since 3.2
*/
protected function refreshIncludePaths()
{
// Reset includePaths
$this->includePaths = array();
// (1 - lower priority) Frontend base layouts
$this->addIncludePaths(JPATH_ROOT . '/layouts');
// (2) Standard Joomla! layouts overriden
$this->addIncludePaths(JPATH_THEMES . '/' . JFactory::getApplication()->getTemplate() . '/html/layouts');
// Component layouts & overrides if exist
$component = $this->options->get('component', null);
if (!empty($component))
{
// (3) Component path
if ($this->options->get('client') == 0)
{
$this->addIncludePaths(JPATH_SITE . '/components/' . $component . '/layouts');
}
else
{
$this->addIncludePaths(JPATH_ADMINISTRATOR . '/components/' . $component . '/layouts');
}
// (4) Component template overrides path
$this->addIncludePath(JPATH_THEMES . '/' . JFactory::getApplication()->getTemplate() . '/html/layouts/' . $component);
}
// (5 - highest priority) Received a custom high priority path ?
if (!is_null($this->basePath))
{
$this->addIncludePath(rtrim($this->basePath, DIRECTORY_SEPARATOR));
}
}
/**
* Change the debug mode
*
* @param boolean $debug Enable / Disable debug
*
* @return void
*
* @since 3.2
*/
public function setDebug($debug)
{
$this->options->set('debug', (boolean) $debug);
}
/**
* Render a layout with the same include paths & options
*
* @param object $layoutId Object which properties are used inside the layout file to build displayed output
* @param mixed $displayData Data to be rendered
*
* @return string The necessary HTML to display the layout
*
* @since 3.2
*/
public function sublayout($layoutId, $displayData)
{
// Sublayouts are searched in a subfolder with the name of the current layout
if (!empty($this->layoutId))
{
$layoutId = $this->layoutId . '.' . $layoutId;
}
$sublayout = new static($layoutId, $this->basePath, $this->options);
$sublayout->includePaths = $this->includePaths;
return $sublayout->render($displayData);
}
}
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