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Initial Drupal 11 with DDEV setup

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2025-10-08 11:39:17 -04:00
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web/core/lib/Drupal/Component/Render/FormattableMarkup.php Normal file
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<?php
namespace Drupal\Component\Render;
use Drupal\Component\Utility\Html;
use Drupal\Component\Utility\UrlHelper;
/**
* Formats a string for HTML display by replacing variable placeholders.
*
* When cast to a string, this object replaces variable placeholders in the
* string with the arguments passed in during construction and escapes the
* values so they can be safely displayed as HTML. See the documentation of
* \Drupal\Component\Render\FormattableMarkup::placeholderFormat() for details
* on the supported placeholders and how to use them securely. Incorrect use of
* this class can result in security vulnerabilities.
*
* In most cases, you should use TranslatableMarkup or PluralTranslatableMarkup
* rather than this object, since they will translate the text (on
* non-English-only sites) in addition to formatting it. Variables concatenated
* without the insertion of language-specific words or punctuation are some
* examples where translation is not applicable and using this class directly
* is appropriate.
*
* This class is designed for formatting messages that are mostly text, not as
* an HTML template language. As such:
* - The passed in string should contain no (or minimal) HTML.
* - The result from casting an object to a string should not be used within
* the "<" and ">" of an HTML tag, such as in HTML attribute values. This
* would be a security risk.
* To build non-minimal HTML, use an HTML template language such as Twig,
* rather than this class.
*
* @ingroup sanitization
*
* @see \Drupal\Core\StringTranslation\TranslatableMarkup
* @see \Drupal\Core\StringTranslation\PluralTranslatableMarkup
* @see \Drupal\Component\Render\FormattableMarkup::placeholderFormat()
*/
class FormattableMarkup implements MarkupInterface, \Countable {
/**
* The string containing placeholders.
*
* @var string
*/
protected $string;
/**
* The arguments to replace placeholders with.
*
* @var array
*/
protected $arguments = [];
/**
* Constructs a new class instance.
*
* @param string $string
* A string containing placeholders. The string itself will not be escaped,
* any unsafe content must be in $args and inserted via placeholders.
* @param array $arguments
* An array with placeholder replacements, keyed by placeholder. See
* \Drupal\Component\Render\FormattableMarkup::placeholderFormat() for
* additional information about correct and secure use of placeholders.
*
* @see \Drupal\Component\Render\FormattableMarkup::placeholderFormat()
*/
public function __construct($string, array $arguments) {
$this->string = (string) $string;
$this->arguments = $arguments;
}
/**
* {@inheritdoc}
*/
public function __toString() {
return static::placeholderFormat($this->string, $this->arguments);
}
/**
* Returns the string length.
*
* @return int
* The length of the string.
*/
public function count(): int {
return mb_strlen($this->string);
}
/**
* Returns a representation of the object for use in JSON serialization.
*
* @return string
* The safe string content.
*/
public function jsonSerialize(): string {
return $this->__toString();
}
/**
* Replaces placeholders in a string with values.
*
* For convenience examples are listed here. Refer to the parameter
* description for $args for details of the placeholders "@", "%", and ":".
*
* Secure examples.
* @code
* // Return the HTML string "Prefix $some_variable".
* $this->placeholderFormat('Prefix @foo', ['@foo' => $some_variable]);
* // Convert an object to a sanitized string.
* $this->placeholderFormat('Non-sanitized replacement value: @foo', ['@foo' => (string) $safe_string_interface_object]);
* // Wrap $some_variable in an <em> tag.
* $this->placeholderFormat('Prefix %foo', ['%foo' => $some_variable]);
* // The following are using the : placeholder inside an HTML tag.
* $this->placeholderFormat('<a href=":foo">link text</a>', [':foo' => $some_variable]);
* $this->placeholderFormat('<a href=":foo" title="static text">link text</a>', [':foo' => $some_variable]);
* $this->placeholderFormat('<a href=":foo">link text</a>', [':foo' => $some_variable]);
* // Use a : placeholder inside an HTML tag.
* $this->placeholderFormat('<img src=":foo" />', [':foo' => '/image.png']);
* @endcode
* The above are typical examples of using the placeholders correctly.
*
* Insecure examples.
* @code
* // The following are using the @ placeholder inside an HTML tag.
* $this->placeholderFormat('<@foo>text</@foo>', ['@foo' => $some_variable]);
* $this->placeholderFormat('<a @foo>link text</a>', ['@foo' => $some_variable]);
* $this->placeholderFormat('<a href="@foo">link text</a>', ['@foo' => $some_variable]);
* $this->placeholderFormat('<a title="@foo">link text</a>', ['@foo' => $some_variable]);
* // Implicitly convert an object to a string, which is not sanitized.
* $this->placeholderFormat('Non-sanitized replacement value: @foo', ['@foo' => $safe_string_interface_object]);
* @endcode
* These are the more common mistakes that can be made. Make sure that your
* site is not using any insecure usages of these placeholders.
*
* @param string $string
* A string containing placeholders. The string itself is expected to be
* safe and correct HTML. Any unsafe content must be in $args and inserted
* via placeholders. It is insecure to use the @ or % placeholders within
* the "<" and ">" of an HTML tag.
* @param array $args
* An associative array of replacements. Each array key should be the same
* as a placeholder in $string. The corresponding value should be a string
* or an object that implements \Drupal\Component\Render\MarkupInterface.
* The args[] value replaces the placeholder in $string. Sanitization and
* formatting will be done before replacement. The type of sanitization
* and formatting depends on the first character of the key:
* - @variable: Use as the default choice for anything displayed on the
* site. Do not use within the "<" and ">" of an HTML tag, such as in
* HTML attribute values. Doing so is a security risk.
* - %variable: Use when @variable would be appropriate, but you want the
* placeholder value to be wrapped in an <em> tag with a placeholder
* class. As with @variable, do not use within the "<" and ">" of an HTML
* tag, such as in HTML attribute values. Doing so is a security risk.
* - :variable: Use when the return value is to be used as a URL value of an
* HTML attribute. Only the "href" attribute is supported. The return
* value is escaped with
* \Drupal\Component\Utility\Html::escape() and filtered for dangerous
* protocols using UrlHelper::stripDangerousProtocols(). Use this when
* using the "href" attribute, ensuring the value is always wrapped in
* quotes.
*
* @return string
* A formatted HTML string with the placeholders replaced.
*
* @ingroup sanitization
*
* @see \Drupal\Core\StringTranslation\TranslatableMarkup
* @see \Drupal\Core\StringTranslation\PluralTranslatableMarkup
* @see \Drupal\Component\Utility\Html::escape()
* @see \Drupal\Component\Utility\UrlHelper::stripDangerousProtocols()
* @see \Drupal\Core\Url::fromUri()
*/
protected static function placeholderFormat($string, array $args) {
// Transform arguments before inserting them.
foreach ($args as $key => $value) {
switch ($key[0]) {
case '@':
// Escape if the value is not an object from a class that implements
// \Drupal\Component\Render\MarkupInterface, for example strings will
// be escaped.
// Strings that are safe within HTML fragments, but not within other
// contexts, may still be an instance of
// \Drupal\Component\Render\MarkupInterface, so this placeholder type
// must not be used within HTML attributes, JavaScript, or CSS.
$args[$key] = static::placeholderEscape($value);
break;
case ':':
// Strip URL protocols that can be XSS vectors.
$value = UrlHelper::stripDangerousProtocols($value);
// Escape unconditionally, without checking whether the value is an
// instance of \Drupal\Component\Render\MarkupInterface. This forces
// characters that are unsafe for use in an "href" HTML attribute to
// be encoded. If a caller wants to pass a value that is extracted
// from HTML and therefore is already HTML encoded, it must invoke
// \Drupal\Component\Render\OutputStrategyInterface::renderFromHtml()
// on it prior to passing it in as a placeholder value of this type.
// @todo Add some advice and stronger warnings.
// https://www.drupal.org/node/2569041.
$args[$key] = Html::escape($value);
break;
case '%':
// Similarly to @, escape non-safe values. Also, add wrapping markup
// in order to render as a placeholder. Not for use within attributes,
// per the warning above about
// \Drupal\Component\Render\MarkupInterface and also due to the
// wrapping markup.
$args[$key] = '<em class="placeholder">' . static::placeholderEscape($value) . '</em>';
break;
default:
if (!ctype_alnum($key[0])) {
// Warn for random placeholders that won't be replaced.
trigger_error(sprintf('Placeholders must begin with one of the following "@", ":" or "%%", invalid placeholder (%s) with string: "%s"', $key, $string), E_USER_WARNING);
}
// No replacement possible therefore we can discard the argument.
unset($args[$key]);
break;
}
}
return strtr($string, $args);
}
/**
* Escapes a placeholder replacement value if needed.
*
* @param string|\Drupal\Component\Render\MarkupInterface $value
* A placeholder replacement value.
*
* @return string
* The properly escaped replacement value.
*/
protected static function placeholderEscape($value) {
return $value instanceof MarkupInterface ? (string) $value : Html::escape($value);
}
}

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<?php
namespace Drupal\Component\Render;
use Drupal\Component\Utility\Html;
/**
* Escapes HTML syntax characters to HTML entities for display in markup.
*
* This class can be used to provide theme engine-like late escaping
* functionality.
*
* @ingroup sanitization
*/
class HtmlEscapedText implements MarkupInterface, \Countable {
/**
* The string to escape.
*
* @var string
*/
protected $string;
/**
* Constructs an HtmlEscapedText object.
*
* @param string $string
* The string to escape. This value will be cast to a string.
*/
public function __construct($string) {
$this->string = (string) $string;
}
/**
* {@inheritdoc}
*/
public function __toString() {
return Html::escape($this->string);
}
/**
* {@inheritdoc}
*/
public function count(): int {
return mb_strlen($this->string);
}
/**
* {@inheritdoc}
*/
public function jsonSerialize(): string {
return $this->__toString();
}
}

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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The licenses for most software are designed to take away your
freedom to share and change it. By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users. This
General Public License applies to most of the Free Software
Foundation's software and to any other program whose authors commit to
using it. (Some other Free Software Foundation software is covered by
the GNU Lesser General Public License instead.) You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
this service if you wish), that you receive source code or can get it
if you want it, that you can change the software or use pieces of it
in new free programs; and that you know you can do these things.
To protect your rights, we need to make restrictions that forbid
anyone to deny you these rights or to ask you to surrender the rights.
These restrictions translate to certain responsibilities for you if you
distribute copies of the software, or if you modify it.
For example, if you distribute copies of such a program, whether
gratis or for a fee, you must give the recipients all the rights that
you have. You must make sure that they, too, receive or can get the
source code. And you must show them these terms so they know their
rights.
We protect your rights with two steps: (1) copyright the software, and
(2) offer you this license which gives you legal permission to copy,
distribute and/or modify the software.
Also, for each author's protection and ours, we want to make certain
that everyone understands that there is no warranty for this free
software. If the software is modified by someone else and passed on, we
want its recipients to know that what they have is not the original, so
that any problems introduced by others will not reflect on the original
authors' reputations.
Finally, any free program is threatened constantly by software
patents. We wish to avoid the danger that redistributors of a free
program will individually obtain patent licenses, in effect making the
program proprietary. To prevent this, we have made it clear that any
patent must be licensed for everyone's free use or not licensed at all.
The precise terms and conditions for copying, distribution and
modification follow.
GNU GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. This License applies to any program or other work which contains
a notice placed by the copyright holder saying it may be distributed
under the terms of this General Public License. The "Program", below,
refers to any such program or work, and a "work based on the Program"
means either the Program or any derivative work under copyright law:
that is to say, a work containing the Program or a portion of it,
either verbatim or with modifications and/or translated into another
language. (Hereinafter, translation is included without limitation in
the term "modification".) Each licensee is addressed as "you".
Activities other than copying, distribution and modification are not
covered by this License; they are outside its scope. The act of
running the Program is not restricted, and the output from the Program
is covered only if its contents constitute a work based on the
Program (independent of having been made by running the Program).
Whether that is true depends on what the Program does.
1. You may copy and distribute verbatim copies of the Program's
source code as you receive it, in any medium, provided that you
conspicuously and appropriately publish on each copy an appropriate
copyright notice and disclaimer of warranty; keep intact all the
notices that refer to this License and to the absence of any warranty;
and give any other recipients of the Program a copy of this License
along with the Program.
You may charge a fee for the physical act of transferring a copy, and
you may at your option offer warranty protection in exchange for a fee.
2. You may modify your copy or copies of the Program or any portion
of it, thus forming a work based on the Program, and copy and
distribute such modifications or work under the terms of Section 1
above, provided that you also meet all of these conditions:
a) You must cause the modified files to carry prominent notices
stating that you changed the files and the date of any change.
b) You must cause any work that you distribute or publish, that in
whole or in part contains or is derived from the Program or any
part thereof, to be licensed as a whole at no charge to all third
parties under the terms of this License.
c) If the modified program normally reads commands interactively
when run, you must cause it, when started running for such
interactive use in the most ordinary way, to print or display an
announcement including an appropriate copyright notice and a
notice that there is no warranty (or else, saying that you provide
a warranty) and that users may redistribute the program under
these conditions, and telling the user how to view a copy of this
License. (Exception: if the Program itself is interactive but
does not normally print such an announcement, your work based on
the Program is not required to print an announcement.)
These requirements apply to the modified work as a whole. If
identifiable sections of that work are not derived from the Program,
and can be reasonably considered independent and separate works in
themselves, then this License, and its terms, do not apply to those
sections when you distribute them as separate works. But when you
distribute the same sections as part of a whole which is a work based
on the Program, the distribution of the whole must be on the terms of
this License, whose permissions for other licensees extend to the
entire whole, and thus to each and every part regardless of who wrote it.
Thus, it is not the intent of this section to claim rights or contest
your rights to work written entirely by you; rather, the intent is to
exercise the right to control the distribution of derivative or
collective works based on the Program.
In addition, mere aggregation of another work not based on the Program
with the Program (or with a work based on the Program) on a volume of
a storage or distribution medium does not bring the other work under
the scope of this License.
3. You may copy and distribute the Program (or a work based on it,
under Section 2) in object code or executable form under the terms of
Sections 1 and 2 above provided that you also do one of the following:
a) Accompany it with the complete corresponding machine-readable
source code, which must be distributed under the terms of Sections
1 and 2 above on a medium customarily used for software interchange; or,
b) Accompany it with a written offer, valid for at least three
years, to give any third party, for a charge no more than your
cost of physically performing source distribution, a complete
machine-readable copy of the corresponding source code, to be
distributed under the terms of Sections 1 and 2 above on a medium
customarily used for software interchange; or,
c) Accompany it with the information you received as to the offer
to distribute corresponding source code. (This alternative is
allowed only for noncommercial distribution and only if you
received the program in object code or executable form with such
an offer, in accord with Subsection b above.)
The source code for a work means the preferred form of the work for
making modifications to it. For an executable work, complete source
code means all the source code for all modules it contains, plus any
associated interface definition files, plus the scripts used to
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anything that is normally distributed (in either source or binary
form) with the major components (compiler, kernel, and so on) of the
operating system on which the executable runs, unless that component
itself accompanies the executable.
If distribution of executable or object code is made by offering
access to copy from a designated place, then offering equivalent
access to copy the source code from the same place counts as
distribution of the source code, even though third parties are not
compelled to copy the source along with the object code.
4. You may not copy, modify, sublicense, or distribute the Program
except as expressly provided under this License. Any attempt
otherwise to copy, modify, sublicense or distribute the Program is
void, and will automatically terminate your rights under this License.
However, parties who have received copies, or rights, from you under
this License will not have their licenses terminated so long as such
parties remain in full compliance.
5. You are not required to accept this License, since you have not
signed it. However, nothing else grants you permission to modify or
distribute the Program or its derivative works. These actions are
prohibited by law if you do not accept this License. Therefore, by
modifying or distributing the Program (or any work based on the
Program), you indicate your acceptance of this License to do so, and
all its terms and conditions for copying, distributing or modifying
the Program or works based on it.
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Program), the recipient automatically receives a license from the
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7. If, as a consequence of a court judgment or allegation of patent
infringement or for any other reason (not limited to patent issues),
conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot
distribute so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you
may not distribute the Program at all. For example, if a patent
license would not permit royalty-free redistribution of the Program by
all those who receive copies directly or indirectly through you, then
the only way you could satisfy both it and this License would be to
refrain entirely from distribution of the Program.
If any portion of this section is held invalid or unenforceable under
any particular circumstance, the balance of the section is intended to
apply and the section as a whole is intended to apply in other
circumstances.
It is not the purpose of this section to induce you to infringe any
patents or other property right claims or to contest validity of any
such claims; this section has the sole purpose of protecting the
integrity of the free software distribution system, which is
implemented by public license practices. Many people have made
generous contributions to the wide range of software distributed
through that system in reliance on consistent application of that
system; it is up to the author/donor to decide if he or she is willing
to distribute software through any other system and a licensee cannot
impose that choice.
This section is intended to make thoroughly clear what is believed to
be a consequence of the rest of this License.
8. If the distribution and/or use of the Program is restricted in
certain countries either by patents or by copyrighted interfaces, the
original copyright holder who places the Program under this License
may add an explicit geographical distribution limitation excluding
those countries, so that distribution is permitted only in or among
countries not thus excluded. In such case, this License incorporates
the limitation as if written in the body of this License.
9. The Free Software Foundation may publish revised and/or new versions
of the General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the Program
specifies a version number of this License which applies to it and "any
later version", you have the option of following the terms and conditions
either of that version or of any later version published by the Free
Software Foundation. If the Program does not specify a version number of
this License, you may choose any version ever published by the Free Software
Foundation.
10. If you wish to incorporate parts of the Program into other free
programs whose distribution conditions are different, write to the author
to ask for permission. For software which is copyrighted by the Free
Software Foundation, write to the Free Software Foundation; we sometimes
make exceptions for this. Our decision will be guided by the two goals
of preserving the free status of all derivatives of our free software and
of promoting the sharing and reuse of software generally.
NO WARRANTY
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
REPAIR OR CORRECTION.
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
be called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License.

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<?php
namespace Drupal\Component\Render;
/**
* Marks an object's __toString() method as returning markup.
*
* Objects that implement this interface will not be automatically XSS filtered
* by the render system or automatically escaped by the theme engine.
*
* If there is any risk of the object's __toString() method returning
* user-entered data that has not been filtered first, it must not be used. If
* the object that implements this does not perform automatic escaping or
* filtering itself, then it must be marked as "@internal". For example, Views
* has the internal ViewsRenderPipelineMarkup object to provide a custom render
* pipeline in order to render JSON and to fast render fields. By contrast,
* FormattableMarkup and TranslatableMarkup always sanitize their output when
* used correctly.
*
* If the object is going to be used directly in Twig templates it should
* implement \Countable so it can be used in if statements.
*
* @see \Drupal\Component\Render\MarkupTrait
* @see \Drupal\Core\Template\TwigExtension::escapeFilter()
* @see \Drupal\Component\Render\FormattableMarkup
* @see \Drupal\Core\StringTranslation\TranslatableMarkup
* @see \Drupal\views\Render\ViewsRenderPipelineMarkup
* @see twig_render_template()
* @see sanitization
* @see theme_render
*/
interface MarkupInterface extends \JsonSerializable, \Stringable {
/**
* Returns markup.
*
* @return string
* The markup.
*/
public function __toString();
}

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<?php
namespace Drupal\Component\Render;
/**
* Implements MarkupInterface and Countable for rendered objects.
*
* @see \Drupal\Component\Render\MarkupInterface
*/
trait MarkupTrait {
/**
* The safe string.
*
* @var string
*/
protected $string;
/**
* Creates a Markup object if necessary.
*
* If $string is equal to a blank string then it is not necessary to create a
* Markup object. If $string is an object that implements MarkupInterface it
* is returned unchanged.
*
* @param mixed $string
* The string to mark as safe. This value will be cast to a string.
*
* @return string|\Drupal\Component\Render\MarkupInterface
* A safe string.
*/
public static function create($string) {
if ($string instanceof MarkupInterface) {
return $string;
}
$string = (string) $string;
if ($string === '') {
return '';
}
$safe_string = new static();
$safe_string->string = $string;
return $safe_string;
}
/**
* Returns the string version of the Markup object.
*
* @return string
* The safe string content.
*/
public function __toString() {
return $this->string;
}
/**
* Returns the string length.
*
* @return int
* The length of the string.
*/
public function count(): int {
return mb_strlen($this->string);
}
/**
* Returns a representation of the object for use in JSON serialization.
*
* @return string
* The safe string content.
*/
public function jsonSerialize(): string {
return $this->__toString();
}
}

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<?php
namespace Drupal\Component\Render;
/**
* Provides an output strategy that formats HTML strings for a given context.
*
* Output strategies assist in transforming HTML strings into strings that are
* appropriate for a given context (e.g. plain-text), through performing the
* relevant formatting. No sanitization is applied.
*/
interface OutputStrategyInterface {
/**
* Transforms a given HTML string into to a context-appropriate output string.
*
* This transformation consists of performing the formatting appropriate to
* a given output context (e.g., plain-text email subjects, HTML attribute
* values).
*
* @param string|object $string
* An HTML string or an object with a ::__toString() magic method returning
* HTML markup. The source HTML markup is considered ready for output into
* HTML fragments and thus already properly escaped and sanitized.
*
* @return string
* A new string that is formatted according to the output strategy.
*/
public static function renderFromHtml($string);
}

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<?php
namespace Drupal\Component\Render;
use Drupal\Component\Utility\Html;
/**
* Provides an output strategy for transforming HTML into simple plain text.
*
* Use this when rendering a given HTML string into a plain text string that
* does not need special formatting, such as a label or an email subject.
*
* Returns a string with HTML tags stripped and HTML entities decoded suitable
* for email or other non-HTML contexts.
*/
class PlainTextOutput implements OutputStrategyInterface {
/**
* {@inheritdoc}
*/
public static function renderFromHtml($string) {
return Html::decodeEntities(strip_tags((string) $string));
}
}

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The Drupal Render Component
Thanks for using this Drupal component.
You can participate in its development on Drupal.org, through our issue system:
https://www.drupal.org/project/issues/drupal
You can get the full Drupal repo here:
https://www.drupal.org/project/drupal/git-instructions
You can browse the full Drupal repo here:
https://git.drupalcode.org/project/drupal

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HOW-TO: Test this Drupal component
In order to test this component, you'll need to get the entire Drupal repo and
run the tests there.
You'll find the tests under core/tests/Drupal/Tests/Component.
You can get the full Drupal repo here:
https://www.drupal.org/project/drupal/git-instructions
You can find more information about running PHPUnit tests with Drupal here:
https://www.drupal.org/node/2116263
Each component in the Drupal\Component namespace has its own annotated test
group. You can use this group to run only the tests for this component. Like
this:
$ ./vendor/bin/phpunit -c core --group Render

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{
"name": "drupal/core-render",
"description": "Renders placeholder variables for HTML and plain-text display.",
"keywords": [
"drupal"
],
"homepage": "https://www.drupal.org/project/drupal",
"license": "GPL-2.0-or-later",
"require": {
"php": ">=8.3.0",
"drupal/core-utility": "^11.2"
},
"autoload": {
"psr-4": {
"Drupal\\Component\\Render\\": ""
}
},
"extra": {
"_readme": [
"This file was partially generated automatically. See: https://www.drupal.org/node/3293830"
]
},
"minimum-stability": "dev"
}