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[READ-ONLY] Subtree split of the Symfony CssSelector Component -- clone into Symfony/Component/ (master at symfony/symfony)

Merge branch '2.7'

* 2.7:
  [PhpUnitBridge] new bridge for testing with PHPUnit
  [FrameworkBundle] Check if templating is enabled.
  [Filesystem] Improve exception message for copy method
  [FrameworkBundle] Made ServerParams a service
  [2.7] [FrameworkBundle] bugfix in configuration for assets
  [FrameworkBundle] Enable assets by default.
  [Form] OptionsResolver 3.0 is not BC anymore
  [TwigBundle] add missing asset dependency
  Add an auto_alias compiler pass

Conflicts:
	.travis.yml
	composer.json
	src/Symfony/Bridge/Doctrine/composer.json
	src/Symfony/Bridge/Monolog/composer.json
	src/Symfony/Bridge/PhpUnit/DeprecationErrorHandler.php
	src/Symfony/Bridge/ProxyManager/composer.json
	src/Symfony/Bridge/Swiftmailer/composer.json
	src/Symfony/Bridge/Twig/composer.json
	src/Symfony/Bundle/DebugBundle/composer.json
	src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php
	src/Symfony/Bundle/FrameworkBundle/composer.json
	src/Symfony/Bundle/SecurityBundle/composer.json
	src/Symfony/Bundle/TwigBundle/composer.json
	src/Symfony/Bundle/WebProfilerBundle/composer.json
	src/Symfony/Component/BrowserKit/composer.json
	src/Symfony/Component/ClassLoader/composer.json
	src/Symfony/Component/Console/composer.json
	src/Symfony/Component/Debug/composer.json
	src/Symfony/Component/DependencyInjection/composer.json
	src/Symfony/Component/DomCrawler/composer.json
	src/Symfony/Component/EventDispatcher/composer.json
	src/Symfony/Component/Form/composer.json
	src/Symfony/Component/HttpFoundation/composer.json
	src/Symfony/Component/HttpKernel/composer.json
	src/Symfony/Component/Intl/composer.json
	src/Symfony/Component/Routing/composer.json
	src/Symfony/Component/Security/Core/composer.json
	src/Symfony/Component/Security/Csrf/composer.json
	src/Symfony/Component/Security/Http/composer.json
	src/Symfony/Component/Security/composer.json
	src/Symfony/Component/Serializer/composer.json
	src/Symfony/Component/Translation/composer.json
	src/Symfony/Component/Validator/composer.json

README.md

CssSelector Component

CssSelector converts CSS selectors to XPath expressions.

The component only goal is to convert CSS selectors to their XPath equivalents:

use Symfony\Component\CssSelector\CssSelector;

print CssSelector::toXPath('div.item > h4 > a');

HTML and XML are different

The CssSelector component comes with an HTML extension which is enabled by default. If you need to use this component with XML documents, you have to disable this HTML extension. That's because, HTML tag & attribute names are always lower-cased, but case-sensitive in XML:

// disable `HTML` extension:
CssSelector::disableHtmlExtension();

// re-enable `HTML` extension:
CssSelector::enableHtmlExtension();

When the HTML extension is enabled, tag names are lower-cased, attribute names are lower-cased, the following extra pseudo-classes are supported: checked, link, disabled, enabled, selected, invalid, hover, visited, and the lang() function is also added.

Resources

This component is a port of the Python cssselect library v0.7.1, which is distributed under the BSD license.

You can run the unit tests with the following command:

$ cd path/to/Symfony/Component/CssSelector/
$ composer install
$ phpunit
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