Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

207 lines (172 sloc) 7.638 kb
<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Form;
/**
* Default implementation of {@link FormRendererEngineInterface}.
*
* @author Bernhard Schussek <bschussek@gmail.com>
*/
abstract class AbstractRendererEngine implements FormRendererEngineInterface
{
/**
* The variable in {@link FormView} used as cache key.
*/
const CACHE_KEY_VAR = 'cache_key';
/**
* @var array
*/
protected $defaultThemes;
/**
* @var array
*/
protected $themes = array();
/**
* @var array
*/
protected $resources = array();
/**
* @var array
*/
private $resourceHierarchyLevels = array();
/**
* Creates a new renderer engine.
*
* @param array $defaultThemes The default themes. The type of these
* themes is open to the implementation.
*/
public function __construct(array $defaultThemes = array())
{
$this->defaultThemes = $defaultThemes;
}
/**
* {@inheritdoc}
*/
public function setTheme(FormView $view, $themes)
{
$cacheKey = $view->vars[self::CACHE_KEY_VAR];
// Do not cast, as casting turns objects into arrays of properties
$this->themes[$cacheKey] = is_array($themes) ? $themes : array($themes);
// Unset instead of resetting to an empty array, in order to allow
// implementations (like TwigRendererEngine) to check whether $cacheKey
// is set at all.
unset($this->resources[$cacheKey]);
unset($this->resourceHierarchyLevels[$cacheKey]);
}
/**
* {@inheritdoc}
*/
public function getResourceForBlockName(FormView $view, $blockName)
{
$cacheKey = $view->vars[self::CACHE_KEY_VAR];
if (!isset($this->resources[$cacheKey][$blockName])) {
$this->loadResourceForBlockName($cacheKey, $view, $blockName);
}
return $this->resources[$cacheKey][$blockName];
}
/**
* {@inheritdoc}
*/
public function getResourceForBlockNameHierarchy(FormView $view, array $blockNameHierarchy, $hierarchyLevel)
{
$cacheKey = $view->vars[self::CACHE_KEY_VAR];
$blockName = $blockNameHierarchy[$hierarchyLevel];
if (!isset($this->resources[$cacheKey][$blockName])) {
$this->loadResourceForBlockNameHierarchy($cacheKey, $view, $blockNameHierarchy, $hierarchyLevel);
}
return $this->resources[$cacheKey][$blockName];
}
/**
* {@inheritdoc}
*/
public function getResourceHierarchyLevel(FormView $view, array $blockNameHierarchy, $hierarchyLevel)
{
$cacheKey = $view->vars[self::CACHE_KEY_VAR];
$blockName = $blockNameHierarchy[$hierarchyLevel];
if (!isset($this->resources[$cacheKey][$blockName])) {
$this->loadResourceForBlockNameHierarchy($cacheKey, $view, $blockNameHierarchy, $hierarchyLevel);
}
// If $block was previously rendered loaded with loadTemplateForBlock(), the template
// is cached but the hierarchy level is not. In this case, we know that the block
// exists at this very hierarchy level, so we can just set it.
if (!isset($this->resourceHierarchyLevels[$cacheKey][$blockName])) {
$this->resourceHierarchyLevels[$cacheKey][$blockName] = $hierarchyLevel;
}
return $this->resourceHierarchyLevels[$cacheKey][$blockName];
}
/**
* Loads the cache with the resource for a given block name.
*
* @see getResourceForBlock()
*
* @param string $cacheKey The cache key of the form view.
* @param FormView $view The form view for finding the applying themes.
* @param string $blockName The name of the block to load.
*
* @return Boolean True if the resource could be loaded, false otherwise.
*/
abstract protected function loadResourceForBlockName($cacheKey, FormView $view, $blockName);
/**
* Loads the cache with the resource for a specific level of a block hierarchy.
*
* @see getResourceForBlockHierarchy()
*
* @param string $cacheKey The cache key used for storing the
* resource.
* @param FormView $view The form view for finding the applying
* themes.
* @param array $blockNameHierarchy The block hierarchy, with the most
* specific block name at the end.
* @param integer $hierarchyLevel The level in the block hierarchy that
* should be loaded.
*
* @return Boolean True if the resource could be loaded, false otherwise.
*/
private function loadResourceForBlockNameHierarchy($cacheKey, FormView $view, array $blockNameHierarchy, $hierarchyLevel)
{
$blockName = $blockNameHierarchy[$hierarchyLevel];
// Try to find a template for that block
if ($this->loadResourceForBlockName($cacheKey, $view, $blockName)) {
// If loadTemplateForBlock() returns true, it was able to populate the
// cache. The only missing thing is to set the hierarchy level at which
// the template was found.
$this->resourceHierarchyLevels[$cacheKey][$blockName] = $hierarchyLevel;
return true;
}
if ($hierarchyLevel > 0) {
$parentLevel = $hierarchyLevel - 1;
$parentBlockName = $blockNameHierarchy[$parentLevel];
// The next two if statements contain slightly duplicated code. This is by intention
// and tries to avoid execution of unnecessary checks in order to increase performance.
if (isset($this->resources[$cacheKey][$parentBlockName])) {
// It may happen that the parent block is already loaded, but its level is not.
// In this case, the parent block must have been loaded by loadResourceForBlock(),
// which does not check the hierarchy of the block. Subsequently the block must have
// been found directly on the parent level.
if (!isset($this->resourceHierarchyLevels[$cacheKey][$parentBlockName])) {
$this->resourceHierarchyLevels[$cacheKey][$parentBlockName] = $parentLevel;
}
// Cache the shortcuts for further accesses
$this->resources[$cacheKey][$blockName] = $this->resources[$cacheKey][$parentBlockName];
$this->resourceHierarchyLevels[$cacheKey][$blockName] = $this->resourceHierarchyLevels[$cacheKey][$parentBlockName];
return true;
}
if ($this->loadResourceForBlockNameHierarchy($cacheKey, $view, $blockNameHierarchy, $parentLevel)) {
// Cache the shortcuts for further accesses
$this->resources[$cacheKey][$blockName] = $this->resources[$cacheKey][$parentBlockName];
$this->resourceHierarchyLevels[$cacheKey][$blockName] = $this->resourceHierarchyLevels[$cacheKey][$parentBlockName];
return true;
}
}
// Cache the result for further accesses
$this->resources[$cacheKey][$blockName] = false;
$this->resourceHierarchyLevels[$cacheKey][$blockName] = false;
return false;
}
}
Jump to Line
Something went wrong with that request. Please try again.