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vendor/phive/twig-extensions-deferred/LICENSE vendored Normal file
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The MIT License (MIT)
Copyright (c) 2014-2017 Eugene Leonovich
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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Deferred Twig Extension
=======================
[![Build Status](https://travis-ci.org/rybakit/twig-extensions-deferred.svg?branch=master)](https://travis-ci.org/rybakit/twig-extensions-deferred)
An extension for Twig that allows to defer block rendering.
## Installation
The recommended way to install the extension is through [Composer](http://getcomposer.org):
```sh
$ composer require phive/twig-extensions-deferred:^1.0
```
## Initialization
```php
$twig = new Twig_Environment($loader);
$twig->addExtension(new Phive\Twig\Extensions\Deferred\DeferredExtension());
```
## Simple Example
```jinja
{# outputs bar #}
{% block foo deferred %}
{{ bar }}
{% endblock %}
{% set bar = 'bar' %}
```
## Advanced Example
Just for example purposes, first create a [global twig variable](http://twig.sensiolabs.org/doc/advanced.html#globals):
```php
$twig = new Twig_Environment($loader);
$twig->addGlobal('data', new ArrayObject());
```
Then build the following set of templates:
```jinja
{# layout.html.twig #}
<!DOCTYPE html>
<html>
<head>
...
</head>
<body>
{% block content '' %}
{{ data.append('/js/layout-header.js') }}
{% block javascripts deferred %}
{% for item in data %}
<script src="{{ item }}"></script>
{% endfor %}
{% endblock %}
{{ data.append('/js/layout-footer.js') }}
</body>
</html>
{# page.html.twig #}
{% extends "layout.html.twig" %}
{% block content %}
{{ data.append('/js/page-header.js') }}
{% if foo is not defined %}
{{ include("subpage1.html.twig") }}
{% else %}
{{ include("subpage2.html.twig") }}
{% endif %}
{{ data.append('/js/page-footer.js') }}
{% endblock %}
{# subpage1.html.twig #}
{{ data.append('/js/subpage1.js') }}
{# subpage2.html.twig #}
{{ data.append('/js/subpage2.js') }}
```
The resulting html will be the following:
```html
<!DOCTYPE html>
<html>
<head>
...
</head>
<body>
<script src="/js/layout-header.js"></script>
<script src="/js/page-header.js"></script>
<script src="/js/subpage1.js"></script>
<script src="/js/page-footer.js"></script>
<script src="/js/layout-footer.js"></script>
</body>
</html>
```
## Block overriding
```jinja
{# index.twig #}
{% extends "base.twig" %}
{% block foo %}foo is not deferred anymore{% endblock %}
{% block bar deferred %}bar is deferred now{% endblock %}
{# base.twig #}
{% block foo deferred %}foo is deferred{% endblock %}
{% block bar %}bar is not deferred{% endblock %}
```
## License
Deferred Twig Extension is released under the MIT License. See the bundled [LICENSE](LICENSE) file for details.

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vendor/phive/twig-extensions-deferred/src/DeferredBlockNode.php vendored Executable file
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<?php
namespace Phive\Twig\Extensions\Deferred;
class DeferredBlockNode extends \Twig_Node_Block
{
public function compile(\Twig_Compiler $compiler)
{
$name = $this->getAttribute('name');
$compiler
->write("public function block_$name(\$context, array \$blocks = array())\n", "{\n")
->indent()
->write("\$this->env->getExtension('Phive\\Twig\\Extensions\\Deferred\\DeferredExtension')->defer(\$this, '$name');\n")
->outdent()
->write("}\n\n")
;
$compiler
->addDebugInfo($this)
->write("public function block_{$name}_deferred(\$context, array \$blocks = array())\n", "{\n")
->indent()
->subcompile($this->getNode('body'))
->write("\$this->env->getExtension('Phive\\Twig\\Extensions\\Deferred\\DeferredExtension')->resolve(\$this, \$context, \$blocks);\n")
->outdent()
->write("}\n\n")
;
}
}

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<?php
namespace Phive\Twig\Extensions\Deferred;
class DeferredExtension extends \Twig_Extension
{
/**
* @var array
*/
private $blocks = array();
/**
* {@inheritdoc}
*/
public function getTokenParsers()
{
return array(new DeferredTokenParser());
}
/**
* {@inheritdoc}
*/
public function getNodeVisitors()
{
return array(new DeferredNodeVisitor());
}
/**
* {@inheritdoc}
*/
public function getName()
{
return 'deferred';
}
public function defer(\Twig_Template $template, $blockName)
{
$templateName = $template->getTemplateName();
$this->blocks[$templateName][] = $blockName;
ob_start();
}
public function resolve(\Twig_Template $template, array $context, array $blocks)
{
$templateName = $template->getTemplateName();
if (empty($this->blocks[$templateName])) {
return;
}
while ($blockName = array_pop($this->blocks[$templateName])) {
$buffer = ob_get_clean();
$blocks[$blockName] = array($template, 'block_'.$blockName.'_deferred');
$template->displayBlock($blockName, $context, $blocks);
echo $buffer;
}
if ($parent = $template->getParent($context)) {
$this->resolve($parent, $context, $blocks);
}
}
}

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vendor/phive/twig-extensions-deferred/src/DeferredNode.php vendored Executable file
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<?php
namespace Phive\Twig\Extensions\Deferred;
class DeferredNode extends \Twig_Node
{
public function compile(\Twig_Compiler $compiler)
{
$compiler
->write("\$this->env->getExtension('Phive\\Twig\\Extensions\\Deferred\\DeferredExtension')->resolve(\$this, \$context, \$blocks);\n")
;
}
}

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vendor/phive/twig-extensions-deferred/src/DeferredNodeVisitor.php vendored Normal file
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<?php
namespace Phive\Twig\Extensions\Deferred;
class DeferredNodeVisitor implements \Twig_NodeVisitorInterface
{
private $hasDeferred = false;
/**
* {@inheritdoc}
*/
public function enterNode(\Twig_NodeInterface $node, \Twig_Environment $env)
{
if (!$this->hasDeferred && $node instanceof DeferredBlockNode) {
$this->hasDeferred = true;
}
return $node;
}
/**
* {@inheritdoc}
*/
public function leaveNode(\Twig_NodeInterface $node, \Twig_Environment $env)
{
if ($this->hasDeferred && $node instanceof \Twig_Node_Module) {
$node->setNode('display_end', new \Twig_Node(array(new DeferredNode(), $node->getNode('display_end'))));
$this->hasDeferred = false;
}
return $node;
}
/**
* {@inheritdoc}
*/
public function getPriority()
{
return 0;
}
}

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<?php
namespace Phive\Twig\Extensions\Deferred;
class DeferredTokenParser extends \Twig_TokenParser
{
private $blockTokenParser;
public function setParser(\Twig_Parser $parser)
{
parent::setParser($parser);
$this->blockTokenParser = new \Twig_TokenParser_Block();
$this->blockTokenParser->setParser($parser);
}
public function parse(\Twig_Token $token)
{
$stream = $this->parser->getStream();
$nameToken = $stream->next();
$deferredToken = $stream->nextIf(\Twig_Token::NAME_TYPE, 'deferred');
$stream->injectTokens(array($nameToken));
$node = $this->blockTokenParser->parse($token);
if ($deferredToken) {
$this->replaceBlockNode($nameToken->getValue());
}
return $node;
}
public function getTag()
{
return 'block';
}
private function replaceBlockNode($name)
{
$block = $this->parser->getBlock($name)->getNode(0);
$this->parser->setBlock($name, $this->createDeferredBlockNode($block));
}
private function createDeferredBlockNode(\Twig_Node_Block $block)
{
$name = $block->getAttribute('name');
$deferredBlock = new DeferredBlockNode($name, new \Twig_Node(array()), $block->getTemplateLine());
foreach ($block as $nodeName => $node) {
$deferredBlock->setNode($nodeName, $node);
}
$deferredBlock->setTemplateName($block->getTemplateName());
return $deferredBlock;
}
}