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<?php
/**
* Joomla! Content Management System
*
* @copyright (C) 2006 Open Source Matters, Inc. <https://www.joomla.org>
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
namespace Joomla\CMS\MVC\View;
\defined('JPATH_PLATFORM') or die;
use Joomla\CMS\Application\ApplicationHelper;
use Joomla\CMS\Event\AbstractEvent;
use Joomla\CMS\Factory;
use Joomla\CMS\Filesystem\Path;
use Joomla\CMS\Language\Text;
use Joomla\CMS\Log\Log;
use Joomla\CMS\Uri\Uri;
/**
* Base class for a Joomla Html View
*
* Class holding methods for displaying presentation data.
*
* @since 2.5.5
*/
class HtmlView extends AbstractView
{
/**
* The base path of the view
*
* @var string
* @since 3.0
*/
protected $_basePath = null;
/**
* Layout name
*
* @var string
* @since 3.0
*/
protected $_layout = 'default';
/**
* Layout extension
*
* @var string
* @since 3.0
*/
protected $_layoutExt = 'php';
/**
* Layout template
*
* @var string
* @since 3.0
*/
protected $_layoutTemplate = '_';
/**
* The set of search directories for resources (templates)
*
* @var array
* @since 3.0
*/
protected $_path = array('template' => array(), 'helper' => array());
/**
* The name of the default template source file.
*
* @var string
* @since 3.0
*/
protected $_template = null;
/**
* The output of the template script.
*
* @var string
* @since 3.0
*/
protected $_output = null;
/**
* Charset to use in escaping mechanisms; defaults to urf8 (UTF-8)
*
* @var string
* @since 3.0
*/
protected $_charset = 'UTF-8';
/**
* Constructor
*
* @param array $config A named configuration array for object construction.
* name: the name (optional) of the view (defaults to the view class name suffix).
* charset: the character set to use for display
* escape: the name (optional) of the function to use for escaping strings
* base_path: the parent path (optional) of the views directory (defaults to the component folder)
* template_plath: the path (optional) of the layout directory (defaults to base_path + /views/ + view name
* helper_path: the path (optional) of the helper files (defaults to base_path + /helpers/)
* layout: the layout (optional) to use to display the view
*
* @since 3.0
*/
public function __construct($config = array())
{
parent::__construct($config);
// Set the charset (used by the variable escaping functions)
if (\array_key_exists('charset', $config))
{
Log::add('Setting a custom charset for escaping is deprecated. Override \JViewLegacy::escape() instead.', Log::WARNING, 'deprecated');
$this->_charset = $config['charset'];
}
// Set a base path for use by the view
if (\array_key_exists('base_path', $config))
{
$this->_basePath = $config['base_path'];
}
else
{
$this->_basePath = JPATH_COMPONENT;
}
// Set the default template search path
if (\array_key_exists('template_path', $config))
{
// User-defined dirs
$this->_setPath('template', $config['template_path']);
}
elseif (is_dir($this->_basePath . '/tmpl/' . $this->getName()))
{
$this->_setPath('template', $this->_basePath . '/tmpl/' . $this->getName());
}
elseif (is_dir($this->_basePath . '/View/' . $this->getName() . '/tmpl'))
{
$this->_setPath('template', $this->_basePath . '/View/' . $this->getName() . '/tmpl');
}
elseif (is_dir($this->_basePath . '/view/' . $this->getName() . '/tmpl'))
{
$this->_setPath('template', $this->_basePath . '/view/' . $this->getName() . '/tmpl');
}
elseif (is_dir($this->_basePath . '/views/' . $this->getName() . '/tmpl'))
{
$this->_setPath('template', $this->_basePath . '/views/' . $this->getName() . '/tmpl');
}
else
{
$this->_setPath('template', $this->_basePath . '/views/' . $this->getName());
}
// Set the default helper search path
if (\array_key_exists('helper_path', $config))
{
// User-defined dirs
$this->_setPath('helper', $config['helper_path']);
}
else
{
$this->_setPath('helper', $this->_basePath . '/helpers');
}
// Set the layout
if (\array_key_exists('layout', $config))
{
$this->setLayout($config['layout']);
}
else
{
$this->setLayout('default');
}
$this->baseurl = Uri::base(true);
}
/**
* Execute and display a template script.
*
* @param string $tpl The name of the template file to parse; automatically searches through the template paths.
*
* @return void
*
* @throws \Exception
* @see \JViewLegacy::loadTemplate()
* @since 3.0
*/
public function display($tpl = null)
{
$app = Factory::getApplication();
if ($this->option)
{
$component = $this->option;
}
else
{
$component = ApplicationHelper::getComponentName();
}
$context = $component . '.' . $this->getName();
$app->getDispatcher()->dispatch(
'onBeforeDisplay',
AbstractEvent::create(
'onBeforeDisplay',
[
'eventClass' => 'Joomla\CMS\Event\View\DisplayEvent',
'subject' => $this,
'extension' => $context
]
)
);
$result = $this->loadTemplate($tpl);
$eventResult = $app->getDispatcher()->dispatch(
'onAfterDisplay',
AbstractEvent::create(
'onAfterDisplay',
[
'eventClass' => 'Joomla\CMS\Event\View\DisplayEvent',
'subject' => $this,
'extension' => $context,
'source' => $result
]
)
);
$eventResult->getArgument('used', false);
echo $result;
}
/**
* Escapes a value for output in a view script.
*
* If escaping mechanism is htmlspecialchars, use
* {@link $_charset} setting.
*
* @param mixed $var The output to escape.
*
* @return mixed The escaped value.
*
* @note the ENT_COMPAT flag was replaced by ENT_QUOTES in Joomla 4.0 to also escape single quotes
*
* @since 3.0
*/
public function escape($var)
{
return htmlspecialchars($var, ENT_QUOTES, $this->_charset);
}
/**
* Get the layout.
*
* @return string The layout name
*
* @since 3.0
*/
public function getLayout()
{
return $this->_layout;
}
/**
* Get the layout template.
*
* @return string The layout template name
*
* @since 3.0
*/
public function getLayoutTemplate()
{
return $this->_layoutTemplate;
}
/**
* Sets the layout name to use
*
* @param string $layout The layout name or a string in format <template>:<layout file>
*
* @return string Previous value.
*
* @since 3.0
*/
public function setLayout($layout)
{
$previous = $this->_layout;
if (strpos($layout, ':') === false)
{
$this->_layout = $layout;
}
else
{
// Convert parameter to array based on :
$temp = explode(':', $layout);
$this->_layout = $temp[1];
// Set layout template
$this->_layoutTemplate = $temp[0];
}
return $previous;
}
/**
* Allows a different extension for the layout files to be used
*
* @param string $value The extension.
*
* @return string Previous value
*
* @since 3.0
*/
public function setLayoutExt($value)
{
$previous = $this->_layoutExt;
if ($value = preg_replace('#[^A-Za-z0-9]#', '', trim($value)))
{
$this->_layoutExt = $value;
}
return $previous;
}
/**
* Adds to the stack of view script paths in LIFO order.
*
* @param mixed $path A directory path or an array of paths.
*
* @return void
*
* @since 3.0
*/
public function addTemplatePath($path)
{
$this->_addPath('template', $path);
}
/**
* Adds to the stack of helper script paths in LIFO order.
*
* @param mixed $path A directory path or an array of paths.
*
* @return void
*
* @since 3.0
*/
public function addHelperPath($path)
{
$this->_addPath('helper', $path);
}
/**
* Load a template file -- first look in the templates folder for an override
*
* @param string $tpl The name of the template source file; automatically searches the template paths and compiles as needed.
*
* @return string The output of the the template script.
*
* @since 3.0
* @throws \Exception
*/
public function loadTemplate($tpl = null)
{
// Clear prior output
$this->_output = null;
$template = Factory::getApplication()->getTemplate(true);
$layout = $this->getLayout();
$layoutTemplate = $this->getLayoutTemplate();
// Create the template file name based on the layout
$file = isset($tpl) ? $layout . '_' . $tpl : $layout;
// Clean the file name
$file = preg_replace('/[^A-Z0-9_\.-]/i', '', $file);
$tpl = isset($tpl) ? preg_replace('/[^A-Z0-9_\.-]/i', '', $tpl) : $tpl;
// Load the language file for the template
$lang = Factory::getLanguage();
$lang->load('tpl_' . $template->template, JPATH_BASE)
|| $lang->load('tpl_' . $template->parent, JPATH_THEMES . '/' . $template->parent)
|| $lang->load('tpl_' . $template->template, JPATH_THEMES . '/' . $template->template);
// Change the template folder if alternative layout is in different template
if (isset($layoutTemplate) && $layoutTemplate !== '_' && $layoutTemplate != $template->template)
{
$this->_path['template'] = str_replace(
JPATH_THEMES . DIRECTORY_SEPARATOR . $template->template,
JPATH_THEMES . DIRECTORY_SEPARATOR . $layoutTemplate,
$this->_path['template']
);
}
// Load the template script
$filetofind = $this->_createFileName('template', array('name' => $file));
$this->_template = Path::find($this->_path['template'], $filetofind);
// If alternate layout can't be found, fall back to default layout
if ($this->_template == false)
{
$filetofind = $this->_createFileName('', array('name' => 'default' . (isset($tpl) ? '_' . $tpl : $tpl)));
$this->_template = Path::find($this->_path['template'], $filetofind);
}
if ($this->_template != false)
{
// Unset so as not to introduce into template scope
unset($tpl, $file);
// Never allow a 'this' property
if (isset($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;
}
throw new \Exception(Text::sprintf('JLIB_APPLICATION_ERROR_LAYOUTFILE_NOT_FOUND', $file), 500);
}
/**
* Load a helper file
*
* @param string $hlp The name of the helper source file automatically searches the helper paths and compiles as needed.
*
* @return void
*
* @since 3.0
*/
public function loadHelper($hlp = null)
{
// Clean the file name
$file = preg_replace('/[^A-Z0-9_\.-]/i', '', $hlp);
// Load the template script
$helper = Path::find($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.
*
* @param string $type The type of path to set, typically 'template'.
* @param mixed $path The new search path, or an array of search paths. If null or false, resets to the current directory only.
*
* @return void
*
* @since 3.0
*/
protected function _setPath($type, $path)
{
if ($this->option)
{
$component = $this->option;
}
else
{
$component = ApplicationHelper::getComponentName();
}
$app = Factory::getApplication();
// Clear out the prior search dirs
$this->_path[$type] = array();
// Actually add the user-specified directories
$this->_addPath($type, $path);
// Get the active template object
$template = $app->getTemplate(true);
// Always add the fallback directories as last resort
switch (strtolower($type))
{
case 'template':
// Set the alternative template search dir
if (isset($app))
{
$component = preg_replace('/[^A-Z0-9_\.-]/i', '', $component);
$name = $this->getName();
if (!empty($template->parent))
{
// Parent template's overrides
$this->_addPath('template', JPATH_THEMES . '/' . $template->parent . '/html/' . $component . '/' . $name);
// Child template's overrides
$this->_addPath('template', JPATH_THEMES . '/' . $template->template . '/html/' . $component . '/' . $name);
break;
}
$this->_addPath('template', JPATH_THEMES . '/' . $template->template . '/html/' . $component . '/' . $name);
}
break;
}
}
/**
* Adds to the search path for templates and resources.
*
* @param string $type The type of path to add.
* @param mixed $path The directory or stream, or an array of either, to search.
*
* @return void
*
* @since 3.0
*/
protected function _addPath($type, $path)
{
// Loop through the path directories
foreach ((array) $path as $dir)
{
// Clean up the path
$dir = Path::clean($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
*
* @param string $type The resource type to create the filename for
* @param array $parts An associative array of filename information
*
* @return string The filename
*
* @since 3.0
*/
protected function _createFileName($type, $parts = array())
{
switch ($type)
{
case 'template':
$filename = strtolower($parts['name']) . '.' . $this->_layoutExt;
break;
default:
$filename = strtolower($parts['name']) . '.php';
break;
}
return $filename;
}
/**
* Returns the form object
*
* @return mixed A \JForm object on success, false on failure
*
* @since 3.2
*/
public function getForm()
{
if (!\is_object($this->form))
{
$this->form = $this->get('Form');
}
return $this->form;
}
/**
* Sets the document title according to Global Configuration options
*
* @param string $title The page title
*
* @return void
*
* @since 3.6
*/
public function setDocumentTitle($title)
{
$app = Factory::getApplication();
// Check for empty title and add site name if param is set
if (empty($title))
{
$title = $app->get('sitename');
}
elseif ($app->get('sitename_pagetitles', 0) == 1)
{
$title = Text::sprintf('JPAGETITLE', $app->get('sitename'), $title);
}
elseif ($app->get('sitename_pagetitles', 0) == 2)
{
$title = Text::sprintf('JPAGETITLE', $title, $app->get('sitename'));
}
$this->document->setTitle($title);
}
}